Academic literature on the topic 'Analyse RNAseq'
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Journal articles on the topic "Analyse RNAseq"
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Cribbs, Adam P., Sebastian Luna-Valero, Charlotte George, Ian M. Sudbery, Antonio J. Berlanga-Taylor, Stephen N. Sansom, Tom Smith, et al. "CGAT-core: a python framework for building scalable, reproducible computational biology workflows." F1000Research 8 (April 4, 2019): 377. http://dx.doi.org/10.12688/f1000research.18674.1.
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In the genomics era computational biologists regularly need to process, analyse and integrate large and complex biomedical datasets. Analysis inevitably involves multiple dependent steps, resulting in complex pipelines or workflows, often with several branches. Large data volumes mean that processing needs to be quick and efficient and scientific rigour requires that analysis be consistent and fully reproducible. We have developed CGAT-core, a python package for the rapid construction of complex computational workflows. CGAT-core seamlessly handles parallelisation across high performance computing clusters, integration of Conda environments, full parameterisation, database integration and logging. To illustrate our workflow framework, we present a pipeline for the analysis of RNAseq data using pseudo-alignment.
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Cribbs, Adam P., Sebastian Luna-Valero, Charlotte George, Ian M. Sudbery, Antonio J. Berlanga-Taylor, Stephen N. Sansom, Tom Smith, et al. "CGAT-core: a python framework for building scalable, reproducible computational biology workflows." F1000Research 8 (July 16, 2019): 377. http://dx.doi.org/10.12688/f1000research.18674.2.
Full textAbstract:
In the genomics era computational biologists regularly need to process, analyse and integrate large and complex biomedical datasets. Analysis inevitably involves multiple dependent steps, resulting in complex pipelines or workflows, often with several branches. Large data volumes mean that processing needs to be quick and efficient and scientific rigour requires that analysis be consistent and fully reproducible. We have developed CGAT-core, a python package for the rapid construction of complex computational workflows. CGAT-core seamlessly handles parallelisation across high performance computing clusters, integration of Conda environments, full parameterisation, database integration and logging. To illustrate our workflow framework, we present a pipeline for the analysis of RNAseq data using pseudo-alignment.
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Portet, Anaïs, Eve Toulza, Ana Lokmer, Camille Huot, David Duval, Richard Galinier, and Benjamin Gourbal. "Experimental Infection of the Biomphalaria glabrata Vector Snail by Schistosoma mansoni Parasites Drives Snail Microbiota Dysbiosis." Microorganisms 9, no. 5 (May 18, 2021): 1084. http://dx.doi.org/10.3390/microorganisms9051084.
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Host-parasite interaction can result in a strong alteration of the host-associated microbiota. This dysbiosis can affect the fitness of the host; can modify pathogen interaction and the outcome of diseases. Biomphalaria glabrata is the snail intermediate host of the trematode Schistosoma mansoni, the agent of human schistosomiasis, causing hundreds of thousands of deaths every year. Here, we present the first study of the snail bacterial microbiota in response to Schistosoma infection. We examined the interplay between B. glabrata, S. mansoni and host microbiota. Snails were infected and the microbiota composition was analysed by 16S rDNA amplicon sequencing approach. We demonstrated that the microbial composition of water did not affect the microbiota composition. Then, we characterised the Biomphalaria bacterial microbiota at the individual scale in both naive and infected snails. Sympatric and allopatric strains of parasites were used for infections and re-infections to analyse the modification or dysbiosis of snail microbiota in different host-parasite co-evolutionary contexts. Concomitantly, using RNAseq, we investigated the link between bacterial microbiota dysbiosis and snail anti-microbial peptide immune response. This work paves the way for a better understanding of snail/schistosome interaction and should have critical consequences in terms of snail control strategies for fighting schistosomiasis disease in the field.
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Allen, S. J. W., S. H. Krawczyk, L. R. McGee, N. Bischofberger, A. S. Mulato, and J. M. Cherrington. "Inhibition of HIV-1 RNase H Activity by Nucleotide Dimers and Monomers." Antiviral Chemistry and Chemotherapy 7, no. 1 (February 1996): 37–45. http://dx.doi.org/10.1177/095632029600700107.
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Nucleotide dimers and monomers were shown to inhibit human immunodeficiency virus type 1 (HIV) RNase H activity. Several effective inhibitors were identified and placed into three general groups based on biochemical characterization of their inhibition, The first group (group A) inhibited HIV RNase H and the closely related feline immunodeficiency virus (FIV) RNase H, but did not inhibit less related retroviral or cellular RNases H or HIV reverse transcriptase (RT). The second group (group B) inhibited the RNase H activity of several retroviruses as well as the reverse transcriptase function of HIV RT. The third group (group C) inhibited RNases H from retroviral and cellular sources but did not inhibit HIV RT. Kinetic analyses of HIV RNase H inhibition were conducted and all three types of inhibitors exhibited a competitive mode of inhibition with regard to substrate. The small nucleotides described here represent the most potent (Ki values from 0.57 to 16 μM) and selective inhibitors of HIV RNase H reported to date. Further structure - function analyses of these molecules may lead to the discovery of unique, potent antiretroviral therapeutics.
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Ahrenfeldt, Johanne, Ditte S. Christensen, Andreas B. Østergaard, Judit Kisistók, Mateo Sokač, and Nicolai J. Birkbak. "The ratio of adaptive to innate immune cells differs between genders and associates with improved prognosis and response to immunotherapy." PLOS ONE 18, no. 2 (February 6, 2023): e0281375. http://dx.doi.org/10.1371/journal.pone.0281375.
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Immunotherapy has revolutionised cancer treatment. However, not all cancer patients benefit, and current stratification strategies based primarily on PD1 status and mutation burden are far from perfect. We hypothesised that high activation of an innate response relative to the adaptive response may prevent proper tumour neoantigen identification and decrease the specific anticancer response, both in the presence and absence of immunotherapy. To investigate this, we obtained transcriptomic data from three large publicly available cancer datasets, the Cancer Genome Atlas (TCGA), the Hartwig Medical Foundation (HMF), and a recently published cohort of metastatic bladder cancer patients treated with immunotherapy. To analyse immune infiltration into bulk tumours, we developed an RNAseq-based model based on previously published definitions to estimate the overall level of infiltrating innate and adaptive immune cells from bulk tumour RNAseq data. From these, the adaptive-to-innate immune ratio (A/I ratio) was defined. A meta-analysis of 32 cancer types from TCGA overall showed improved overall survival in patients with an A/I ratio above median (Hazard ratio (HR) females 0.73, HR males 0.86, P < 0.05). Of particular interest, we found that the association was different for males and females for eight cancer types, demonstrating a gender bias in the relative balance of the infiltration of innate and adaptive immune cells. For patients with metastatic disease, we found that responders to immunotherapy had a significantly higher A/I ratio than non-responders in HMF (P = 0.036) and a significantly higher ratio in complete responders in a separate metastatic bladder cancer dataset (P = 0.022). Overall, the adaptive-to-innate immune ratio seems to define separate states of immune activation, likely linked to fundamental immunological reactions to cancer. This ratio was associated with improved prognosis and improved response to immunotherapy, demonstrating potential relevance to patient stratification. Furthermore, by demonstrating a significant difference between males and females that associates with response, we highlight an important gender bias which likely has direct clinical relevance.
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Orlandi, Elisa, Elisa De Tomi, Rachele Campagnari, Francesca Belpinati, Monica Rodolfo, Elisabetta Vergani, Giovanni Malerba, Macarena Gomez-Lira, Marta Menegazzi, and Maria Romanelli. "Human Melanoma Cells Differentially Express RNASEL/RNase-L and miR-146a-5p under Sex Hormonal Stimulation." Current Issues in Molecular Biology 44, no. 10 (October 11, 2022): 4790–802. http://dx.doi.org/10.3390/cimb44100326.
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Polymorphisms in the ribonuclease L (RNASEL) coding gene and hsa-miR-146a-5p (miR-146a) have been associated with melanoma in a sex-specific manner. We hypothesized that RNASEL and miR-146a expression could be influenced by sex hormones playing a role in the female advantages observed in melanoma incidence and survival. Thus, we explored the effects of testosterone and 17β-estradiol on RNASEL and miR-146a expression in LM-20 and A375 melanoma cell lines. Direct targeting of miR-146a to the 3’ untranslated region (3′UTR) of RNASEL was examined using a luciferase reporter system. Our results indicate that RNASEL is a direct target of miR-146a in both melanoma cell lines. Trough qPCR and western blot analyses, we explored the effect of miR-146a mimic transfection in the presence of each hormone either on RNASEL mRNA level or on protein expression of RNase-L, the enzyme codified by RNASEL gene. In the presence of testosterone or 17β-estradiol, miR-146a overexpression did not influence RNASEL transcript level in LM-20 cell line, but it slightly induced RNASEL mRNA level in A375 cells. Remarkably, miR-146a overexpression was able to repress the protein level of RNase-L in both LM-20 and A375 cells in the presence of each hormone, as well as to elicit high expression levels of the activated form of the extracellular signal-regulated kinases (ERK)1/2, hence confirming the pro-tumorigenic role of miR-146a overexpression in melanoma. Thereafter, we assessed if the administration of each hormone could affect the endogenous expression of RNASEL and miR-146a genes in LM-20 and A375 cell lines. Testosterone exerted no significant effect on RNASEL gene expression in both cell lines, while 17β-estradiol enhanced RNASEL transcript level at least in LM-20 melanoma cells. Conversely, miR-146a transcript augmented only in the presence of testosterone in either melanoma cell line. Importantly, each hormone acted quite the opposite regarding the RNase-L protein expression, i.e., testosterone significantly decreased RNase-L expression, whereas 17β-estradiol increased it. Overall, the data show that, in melanoma cells treated with 17β-estradiol, RNase-L expression increased likely by transcriptional induction of its gene. Testosterone, instead, decreased RNase-L expression in melanoma cell lines with a post-transcriptional mechanism in which miR-146a could play a role. In conclusion, the pro-tumor activity of androgen hormone in melanoma cells could be exacerbated by both miR-146a increase and RNase-L downregulation. These events may contribute to the worse outcome in male melanoma patients.
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Oczkowicz, Maria, Małgorzata Świątkiewicz, Katarzyna Ropka-Molik, Artur Gurgul, and Kacper Żukowski. "Effects of Different Sources of Fat in the Diet of Pigs on the Liver Transcriptome Estimated by RNA-Seq." Annals of Animal Science 16, no. 4 (October 1, 2016): 1073–90. http://dx.doi.org/10.1515/aoas-2016-0033.
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Abstract In this study, we have attempted to analyse the impact of dietary fats on the liver transcriptome in pigs. Four nutritional groups were created. The animals’ diets differed among groups in terms of the presence of corn dried distillers’ grains with solubles (DDGS) (group I - no DDGS, groups II, III, IV - 20% DDGS) as well as the type of fat (rapeseed oil - groups I and II, beef tallow - group III, coconut oil - group IV) used. Using the RNA-Seq method we identified 39 differentially expressed genes (DEGs) as a result of Cuffdiff analysis of the differences among all groups. Analysis of these genes with Panther Gene Classification System revealed that among identified DEGs, genes responsible for lipid and fatty acids metabolism are overrepresented as well as the genes engaged in oxidoreductase and catalytic activity. The article presents for the first time the RNAseq analysis of the liver transcriptome in pigs fed with different sources of fats. The results may be useful for the elaboration of new therapies for cardiovascular diseases in humans as well as for the preparation of new nutrition strategies in animals.
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Penttinen, Jenni, Dwi Ari Pujianto, Petra Sipilä, Ilpo Huhtaniemi, and Matti Poutanen. "Discovery in Silico and Characterization in Vitro of Novel Genes Exclusively Expressed in the Mouse Epididymis." Molecular Endocrinology 17, no. 11 (November 1, 2003): 2138–51. http://dx.doi.org/10.1210/me.2003-0008.
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Abstract Epididymal proteins interact with sperm during their passage through the epididymis and thus contribute to the maturation and fertilizing capacity of the spermatozoa. In the present study we have discovered five novel epididymis-specific genes through in silico analysis of expressed sequence tags (ESTs) at the UniGene library collection. The strategy used is a powerful way to discover novel epididymis-specific genes. The full-length cDNA sequences were determined, and computational tools were used to characterize the genomic structures and to predict putative functions for the encoded proteins. In vitro analyses revealed that all five genes characterized were highly expressed in the defined areas of the epididymis, and they were not expressed at significant levels in any other tissue. Three of the genes were named on the basis of their putative functions: Spint4 (serine protease inhibitor, Kunitz type 4), and Rnase9 and Rnase10 (ribonuclease, Rnase A family 9 and 10), while for the ESTs AV381130 and AV381126 no putative functions could be predicted. The expression of Spint4, Rnase9, and AV381130 was found to be under a direct or indirect regulation by androgens, while the expression of Rnase10 is regulated by a testicular factor(s) other than androgen. None of the genes were expressed in the immature epididymis, while mRNAs were detected from d 17 onward, at the time of maturation of epididymal epithelium. However, the expression of AV381130 was not detected until d 30 after birth, indicating a close connection between gene expression and puberty.
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Malvisi, Michela, Nico Curti, Daniel Remondini, Maria Grazia De Iorio, Fiorentina Palazzo, Gustavo Gandini, Silvia Vitali, Michele Polli, John L. Williams, and Giulietta Minozzi. "Combinatorial Discriminant Analysis Applied to RNAseq Data Reveals a Set of 10 Transcripts as Signatures of Exposure of Cattle to Mycobacterium avium subsp. paratuberculosis." Animals 10, no. 2 (February 5, 2020): 253. http://dx.doi.org/10.3390/ani10020253.
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Paratuberculosis or Johne’s disease in cattle is a chronic granulomatous gastroenteritis caused by infection with Mycobacterium avium subspecies paratuberculosis (MAP). Paratuberculosis is not treatable; therefore, the early identification and isolation of infected animals is a key point to reduce its incidence. In this paper, we analyse RNAseq experimental data of 5 ELISA-negative cattle exposed to MAP in a positive herd, compared to 5 negative-unexposed controls. The purpose was to find a small set of differentially expressed genes able to discriminate between exposed animals in a preclinical phase from non-exposed controls. Our results identified 10 transcripts that differentiate between ELISA-negative, clinically healthy, and exposed animals belonging to paratuberculosis-positive herds and negative-unexposed animals. Of the 10 transcripts, five (TRPV4, RIC8B, IL5RA, ERF, CDC40) showed significant differential expression between the three groups while the remaining 5 (RDM1, EPHX1, STAU1, TLE1, ASB8) did not show a significant difference in at least one of the pairwise comparisons. When tested in a larger cohort, these findings may contribute to the development of a new diagnostic test for paratuberculosis based on a gene expression signature. Such a diagnostic tool could allow early interventions to reduce the risk of the infection spreading.
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Ramanauskas, Karolis, and Boris Igić. "The evolutionary history of plant T2/S-type ribonucleases." PeerJ 5 (September 11, 2017): e3790. http://dx.doi.org/10.7717/peerj.3790.
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A growing number of T2/S-RNases are being discovered in plant genomes. Members of this protein family have a variety of known functions, but the vast majority are still uncharacterized. We present data and analyses of phylogenetic relationships among T2/S-RNases, and pay special attention to the group that contains the female component of the most widespread system of self-incompatibility in flowering plants. The returned emphasis on the initially identified component of this mechanism yields important conjectures about its evolutionary context. First, we find that the clade involved in self-rejection (class III) is found exclusively in core eudicots, while the remaining clades contain members from other vascular plants. Second, certain features, such as intron patterns, isoelectric point, and conserved amino acid regions, help differentiate S-RNases, which are necessary for expression of self-incompatibility, from other T2/S-RNase family members. Third, we devise and present a set of approaches to clarify new S-RNase candidates from existing genome assemblies. We use genomic features to identify putative functional and relictual S-loci in genomes of plants with unknown mechanisms of self-incompatibility. The widespread occurrence of possible relicts suggests that the loss of functional self-incompatibility may leave traces long after the fact, and that this manner of molecular fossil-like data could be an important source of information about the history and distribution of both RNase-based and other mechanisms of self-incompatibility. Finally, we release a public resource intended to aid the search for S-locus RNases, and help provide increasingly detailed information about their taxonomic distribution.
Dissertations / Theses on the topic "Analyse RNAseq"
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Benoit-Pilven, Clara. "Analyse de l’épissage alternatif dans les données RNAseq : développement et comparaison d’outils bioinformatiques." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSE1280/document.
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L'épissage alternatif est un processus biologique qui génère la diversité du protéome malgré le nombre limité de gène. Ce mécanisme régule à la fois les gènes de manières qualitatives (isoformes exprimées) mais aussi quantitatives (niveau d'expression). Avec le développement des technologies de séquençage à haut débit, il est maintenant possible d'étudier à large échelle les aspects quantitatif et qualitatif du transcriptome avec une même expérience (RNA-seq). Durant ma thèse, j'ai développé une nouvelle méthode d'analyse de l'épissage alternatif dans les données RNA-seq. J'ai également participé à la mise en place du pipeline global d'analyse de données RNA-seq (expression et épissage) qui a été utilisé pour analyser un grand nombre de jeux de données. Dans un second temps, nous avons comparé notre outil d'analyse de l'épissage, FaRLine, qui est basé sur l'alignement sur un génome de référence, à KisSplice, une méthode basée sur l'assemblage. Nous avons montré que ces méthodes trouvaient un grand nombre d'événements en communs (70%), mais qu'il existait des différences non négligeables dues à la méthodologie. Nous avons analysé et classifié ces événements en 4 grandes catégories. Les variants faiblement exprimés et les exons chevauchant des éléments répétés sont mieux annotés par les méthodes basées sur l'alignement. Alors que les méthodes basées sur l'assemblage trouvent des nouveaux variants (exons ou sites d'épissage non annotés) et prédisent de l'épissage alternatif dans les famille de gènes paralogues. Notre travail souligne les points qui nécessitent encore l'amélioration des méthodes bioinformatiques. Enfin, j'ai participé au développement de méthodes permettant d'aider les biologistes à évaluer l'impact fonctionnel de modification d'épissage, que ce soit au niveau de la protéine produite (annotation des domaines protéiques au niveau des exons), ou à un niveau plus global en intégrant les modifications d'épissage dans les voies de signalisationAlternative splicing is the biological process that explain the large diversity of the proteome compared to the limited number of genes. This process allow a qualitative regulation (expressed isoforms) and a quantitative regulation (expression level). The growth of high-trhoughtput sequencing methods enabled the analysis of these two aspects (quantitative and qualitative regulation) with the same experiment (RNA-Seq). During my PhD, I developped a new tool to analyse alternative splicing from RNA-Seq data. I also participated in the automatisation of the complet pipeline of RNA-Seq analysis (expression and splicing). This pipeline has been used to analyse various datasets. Then, we compared our mapping-first tool, FaRLine, with an assembly-first method, KisSplice. We found that the predictions of the two pipelines overlapped (70\% of exon skipping events were common), but with noticeable differences. The mapping-first approach allowed to find more lowly expressed splicing variants, and was better in predicting exons overlapping repeated elements. The assembly-first approach allowed to find more novel variants, including novel unannotated exons and splice sites. It also predicted AS in families of paralog genes. Our work point out where the bioinformatic improvment are still needed. Finally, I participated in the developpement of bioinformatics methods to help biologists to evualuate the fonctionnal impact of splicing alteration : at the level of the protein product by annotating fonctionnal domain at the exon level or at a more global level, by integrating splicing modifications in signaling pathways
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Meunier, Léa. "Analyse de signatures transcriptomiques et épigénétiques des carcinomes hépatocellulaires." Thesis, Université de Paris (2019-....), 2020. http://www.theses.fr/2020UNIP7082.
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Élucider les processus transcriptionnels et épigénétiques dérégulés dans les cancers est fondamental pour mieux comprendre les voies biologiques impliquées et proposer une thérapie adaptée au phénotype moléculaire de chaque tumeur. Les approches classiques de classification non supervisée définissent des groupes moléculaires principaux pour chaque type tumoral. Cependant, ces méthodes, appliquées à des tumeurs complexes comme le carcinome hépatocellulaire (CHC), le 3ème cancer le plus mortel au monde, définissent des groupes qui restent relativement hétérogènes et ne reflètent qu’imparfaitement la diversité des mécanismes biologiques à l’œuvre dans ces tumeurs. Au cours de ma thèse, j’ai développé une stratégie d’analyses innovante, basée sur l’analyse en composantes indépendantes (ACI), pour extraire des signatures de processus biologiques précis à partir de grands jeux de données transcriptomiques et épigénétiques. Grace à cette nouvelle approche, j’ai identifié des groupes de gènes co-régulés, associés à des phénotypes ou altérations moléculaires précises. De même, l’analyse en composantes indépendantes du méthylome de 738 CHC m’a permis d’isoler 13 signatures épigénétiques stables, préférentiellement actives dans certaines tumeurs et certains sites CpG. Ces signatures incluent des signatures de méthylation précédemment associées au vieillissement et au cancer, mais aussi de nouvelles signatures d'hyper- et d'hypométhylation liées à des événements « drivers » et sous-groupes moléculaires spécifiques. Ces résultats nous éclairent sur la diversité des mécanismes moléculaires impliqués dans la carcinogenèse hépatique. Les outils d’analyse biostatistique innovants que j’ai développés ont été incorporés dans un package R librement utilisable par la communauté scientifiqueElucidating deregulated transcriptional and epigenetic processes in cancers is fundamental to better understand the biological pathways involved and to propose a therapy adapted to the molecular phenotype of each tumor. Classical unsupervised classification approaches define, for each tumor type, the main molecular groups. However, these methods, applied to complex tumors such as hepatocellular carcinoma (HCC), the 3rd cause of cancer-associated mortality worldwide, define groups that remain relatively heterogeneous and only imperfectly reflect the diversity of biological mechanisms at work in these tumors. During my PhD, I developed a, innovative strategy involving independent component analysis (ICA) to extract signatures of precise biological processes in large transcriptomic and epigenetic tumor data sets. This new approach allowed me to identify groups of co-regulated genes associated with specific phenotypes or molecular alterations. Similarly, independent component analysis of the methylomes of 738 HCC revealed 13 stable epigenetic signatures preferentially active in specific tumors and CpG sites. These signatures include signatures previously associated with ageing and cancer, but also new hyper- and hypomethylation signatures related to specific driver events and molecular subgroups. The work presented in this thesis sheds light on the diversity of molecular processes remodeling liver cancer transcriptomes and methylomes, improve the understanding of the molecular mechanisms involved in hepatic carcinogenesis and provides a statistical framework to unravel the signatures of these processes
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Riquier, Sébastien. "Dans les abysses du transcriptome : découverte de nouveaux biomarqueurs de cellules souches mésenchymateuses par analyse approfondie du RNAseq." Thesis, Montpellier, 2019. http://www.theses.fr/2019MONTT004.
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Le développement du séquençage ARN, ou RNAseq, a permis l'essor de la recherche intensive de biomarqueurs dans de nombreux domaines de la biologie. L’information complète du transcriptome contenue dans les données de sorties, permet à un bioinformaticien assidu de dépasser les connaissances actuelles et d’accéder, grâce à des pipelines informatiques avancés, à d’innombrables signatures d’intérêts inédites. Dans cette thèse nous mettons en avant que ces marqueurs potentiels, essentiellement explorés pour répondre à des problématiques clinique en conditions pathologiques, peuvent être utilisés pour affiner la caractérisation de types de cellules sans marqueurs strictement spécifiques. Nous nous sommes intéressés aux cellules souches mésenchymateuses (MSCs), un type de cellules souches adultes multipotentes, fortement utilisées en clinique mais ne possédant pas de marqueurs positifs strictement spécifiques.Notre étude se concentre sur la recherche des ARN longs non-codants non annotés. Ces ARNs, aussi nommés "lncRNA", constituent une classe émergente de transcrits encore peu explorée à ce jour. De plus, cette catégorie démontre une spécificité conditionnelle et tissulaire élevée. Nous avons élaboré un pipeline d’analyse RNAseq optimisé pour la reconstruction et la quantification de lncRNAs non annotés.En utilisant les données publiques de RNAseq, venant de différentes sources de MSCs et d'autres types de cellules, nous avons identifié de nouveaux lncRNA non annotés exprimés spécifiquement dans les MSCs.Nous avons développé pour ce projet Kmerator.jl, un outil qui permet de décomposer un transcrit en sous séquences spécifiques (k-mers) afin de chercher et quantifier plus rapidement la signature de nos candidats dans un grand nombre de données RNAseq. Kmerator a également été utilisé dans d'autres applications pour tester la qualité des données RNA-seq disponibles en accés public.Après validation de ces nouveaux biomarqueurs de MSCs par qPCR, nous avons eu recours à plusieurs outils informatiques pour prédire leurs fonctions potentielles. Enfin, nous avons analysé des données RNAseq « single-cell » pour aborder l’hétérogénéité d’expression au sein des populations MSCsThe development of RNA sequencing, or RNAseq, have opened the path of intensive biomarkers research in many areas of biology. The complete information of the transcriptome contained in the output data, allows a bioinformatician to surpass the current knowledge and to access, thanks to advanced computer pipelines, to signatures of new interest. In this thesis, we are showing that these potential markers, classically used in clinical and pathological conditions, can be used to characterize cell types without extensive markers profile. We have studied mesenchymal stem cells, a type of adult multipotent stem cells, strongly used in clinics but without strickly specific positive markers. Our study mainly focuses on the search for non-annotated, long non-coding RNAs. These RNAs, also called "lncRNA", constitute an emerging class of transcripts and are still lightly explored.In addition, this category presents a highly tissue-related specificity. We have developed an optimized RNAseq pipeline for the reconstruction and quantification of non-annotated lncRNAs.Using public data from RNAseq, coming from different sources of MSC and other cell types, we have identified new non-annotated lncRNAs clearly and specifically expressed in MSCs. to complete this project, we developed Kmerator.jl, a bioinformatical tool that allows to decompose a transcript in k-mer, and select specific sub-sequences, in order to search and quantify at a faster rate the signature of our candidates in a large number of RNAseq dataset. After validation of these new biomarkers of MSCs by qPCR, we used several computer tools to predict their potential functions. Finally, we analyzed single-cell RNAseq data to address the heterogeneity of expression within MSC populations
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Gonzalez, Claudia. "Étude des mécanismes immunitaires impliqués dans le contrôle de l'infection par le virus Nipah." Electronic Thesis or Diss., Lyon, École normale supérieure, 2024. http://www.theses.fr/2024ENSL0035.
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Le virus Nipah (NiV) est un paramyxovirus hautement pathogène pour les humains faisant partie de la liste prioritaire pour la recherche et le développement de l’OMS. Les chauves-souris Pteropus sont le réservoir naturel asymptomatique du NiV et nous nous sommes intéressés aux mécanismes leur permettant de contrôler l’infection. Pour cela, nous avons réalisé une analyse transcriptomique comparative entre des cellules de chauves-souris et des cellules humaines. Nous avons tout d’abord observé des profils immunitaires innés distincts à l’état basal. Les cellules de chauves-souris présentent des niveaux élevés de récepteurs aux pathogènes comme TLR-3 et TLR-8, pouvant expliquer une détection rapide du virus. De plus, la cinétique d’activation des gènes a montré une différence entre les deux espèces, avec une activation précoce chez les chauves-souris alors que plus tardive et de plus grande amplitude chez les humains. L’activation précoce de la voie NF-kB a été observée chez les chauves-souris et parmi ces facteurs, c-Rel faisait partie des gènes les plus exprimés. L’analyse fonctionnelle a révélé que les protéines c-Rel humaine et de chauve-souris induisent l’activation de la voie NF-kB et sont inhibées par la protéine virale non structurale NiV-W. Nous avons aussi montré la capacité du c-Rel de chauve-souris, contrairement au c-Rel humain, de moduler l’activité du promoteur de réponse aux IFN (ISRE) après stimulation par l’IFN. Cette étude suggère que la réponse rapide et transitoire des Pteropus pourrait favoriser une meilleure régulation des réponses pro-inflammatoires et contribuer à leur capacité de contrôler l’infection NiV. Étant donné que nous ne disposons ni de traitement ni de vaccin pour ce virus, le travail a aussi porté sur l’évaluation d’un inhibiteur de fusion agissant sur l’entrée du virus, et un essai vaccinal chez un modèle primate. Ce dernier, combinant le récepteur CD40 à l’ectodomaine de la protéine NiV-G a été validé in vivo, démontrant une protection complète chez les singes immunisés. L’ensemble de ces résultats ouvre de nouvelles perspectives vers des approches antivirales innovantesNipah virus (NiV) is a highly pathogenic paramyxovirus for humans, listed as a priority for research and development by the WHO. Pteropus bats are the natural asymptomatic reservoir of NiV and we investigated on the mechanisms allowing them to control the infection. For this, we conducted a comparative transcriptomic analysis between bat and human cells. We observed distinct immune profiles at the basal state. Bat cells show high levels of receptors like TLR-3 and TLR-8, which may explain the rapid viral detection. Additionally, the kinetics of gene expression resulted to be different among the two species, as we detected early gene activation in bats, while the response in humans was delayed. Early activation of the NF-kB pathway was observed in bats, and among these factors, c-Rel was one of the most expressed genes. Functional analysis revealed that both human and bat c-Rel proteins induce NF-kB pathway activation and are inhibited by the non-structural protein NiV-W. We also demonstrated the ability of bat c-Rel, unlike human c-Rel, to modulate IFN response promoter (ISRE) activity after IFN stimulation. This study suggests that the rapid and transient response of Pteropus may promote better regulation of pro-inflammatory responses and contribute to their ability to control NiV infection. Since no treatment or vaccine is available for this virus, the work also focused on evaluating a fusion inhibitor acting on virus entry and a vaccine. The latter, combining the CD40 receptor with the ectodomain of the G protein, was validated in vivo, demonstrating complete protection Nipah virus (NiV) is a highly pathogenic paramyxovirus for humans, listed as a priority for research and development by the WHO. Pteropus bats are the natural asymptomatic reservoir of NiV and we investigated on the mechanisms allowing them to control the infection. For this, we conducted a comparative transcriptomic analysis between bat and human cells. We observed distinct immune profiles at the basal state. Bat cells show high levels of receptors like TLR-3 and TLR-8, which may explain the rapid viral detection. Additionally, the kinetics of gene expression resulted to be different among the two species, as we detected early gene activation in bats, while the response in humans was delayed. Early activation of the NF-kB pathway was observed in bats, and among these factors, c-Rel was one of the most expressed genes. Functional analysis revealed that both human and bat c-Rel proteins induce NF-kB pathway activation and are inhibited by the non-structural protein NiV-W. We also demonstrated the ability of bat c-Rel, unlike human c-Rel, to modulate IFN response promoter (ISRE) activity after IFN stimulation. This study suggests that the rapid and transient response of Pteropus may promote better regulation of pro-inflammatory responses and contribute to their ability to control NiV infection. Since no treatment or vaccine is available for this virus, the work also focused on evaluating a fusion inhibitor acting on virus entry and a vaccine. The latter, combining the CD40 receptor with the ectodomain of the G protein, was validated in vivo, demonstrating complete protection in immunized monkeys. These results open new perspectives for innovative antiviral approaches
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Gössringer, Markus. "In-vivo-Analysen zur Funktion bakterieller RNase-P-Proteine in Bacillus subtilis." [S.l. : s.n.], 2004. http://archiv.ub.uni-marburg.de/diss/z2004/0529/.
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Ahmed, Firdous. "Identification of potential biomarkers in lung cancer as possible diagnostic agents using bioinformatics and molecular approaches." University of the Western Cape, 2015. http://hdl.handle.net/11394/4862.
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>Magister Scientiae - MScLung cancer remains the leading cause of cancer deaths worldwide, with the majority of cases attributed to non-small cell lung carcinomas. At the time of diagnosis, a large percentage of patients present with advanced stage of disease, ultimately resulting in a poor prognosis. The identification circulatory markers, overexpressed by the tumour tissue, could facilitate the discovery of an early, specific, non-invasive diagnostic tool as well as improving prognosis and treatment protocols. The aim was to analyse gene expression data from both microarray and RNA sequencing platforms, using bioinformatics and statistical analysis tools. Enrichment analysis sought to identify genes, which were differentially expressed (p < 0.05, FC > 2) and had the potential to be secreted into the extracellular circulation, by using Gene Ontology terms of the Cellular Component. Results identified 1 657 statically significant genes between normal and early lung cancer tissue, with only 1 gene differentially expressed (DE) between the early and late stage disease. Following statistical analysis, 171 DE genes selected as potential early stage biomarkers. The overall sensitivity of RNAseq, in comparison to arrays enabled the identification of 57 potential serum markers. These genes of interest were all downregulated in the tumour tissue, and while they did not facilitate the discovery of an ideal diagnostic marker based on the set criteria in this study, their roles in disease initiation and progression require further analysis.
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Mary, Catherine. "Utilisation séquentielle des sites accepteurs d'épissage lors de l'expression du provirus HIV-1 : analyse par cartographie à la RNAse." Lyon 1, 1994. http://www.theses.fr/1994LYO1T236.
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Ahmed, Fathima Zuba. "Unravelling genes responsible for successful anthocyanin production in Nicotiana benthamiana." Thesis, Queensland University of Technology, 2022. https://eprints.qut.edu.au/230763/1/Fathima%20Zuba_Ahmed_Thesis.pdf.
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This thesis utilised two approaches, forward genetics and comparative transcriptomic analysis, to investigate the contrasting response to anthocyanin production observed in two distinct Nicotiana benthamiana ecotypes, LAB and QLD. The thesis is a step forward in utilising N. benthamiana as a candidate in forward genetics, currently limited due to its large complex genome and polyploid nature. The study utilised a cross-population between LAB and QLD to investigate the nature of inheritance of the contrasting parental phenotypes in its progeny. Additionally, expression profiles of anthocyanin biosynthesis genes were analysed via differential expression analysis and a novel method of mathematical manifold analysis
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Marchant, Axelle. "Le processus de domiciliation des punaises hématophages vectrices de la maladie de Chagas : apport de l’étude du transcriptome chimiosensoriel." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLS008/document.
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En Amérique Latine, les punaises hématophages Triatominae transmettent à l’homme le parasite Trypanosoma cruzi, responsable de la maladie de Chagas touchant actuellement 5 millions de personnes. Même si les programmes d’éradication chimique des vecteurs sont efficaces, la maladie persiste du fait de la recolonisation des habitations humaines par des vecteurs provenant d’habitats naturels. Ainsi, certaines espèces présentent une capacité d’adaptation aux anthroposystèmes (processus de domiciliation), alors que d’autres espèces apparentées ne l’ont pas. Comprendre cette capacité d’adaptation est crucial d’un point de vue épidémiologique afin de cibler les espèces présentant un risque pour l’homme. La capacité à s’adapter à un nouvel habitat pourrait être liée à l’évolution du répertoire de gènes du système chimiosensoriel, important pour la perception du milieu. Cette étude a porté sur le système chimiosensoriel des Triatominae dans le but de documenter le processus d’adaptation et donc de domiciliation des vecteurs. Des données transcriptomiques obtenues en séquençage à haut débit ont été utilisées pour annoter et répertorier les gènes chimiosensoriels ainsi que pour comparer leur expression au sein de punaises hématophages d’habitats différents. L’existence d’une relation entre les variations de ces gènes chez différentes espèces de Triatominae et leur capacité d’adaptation à un habitat a par la suite été évaluée. L’espèce T. brasiliensis en voie de domiciliation au Brésil et présentant à la fois des populations sylvatiques, péri-domiciliaires et domiciliaires, et différentes espèces du genre Rhodnius d’habitats variés, ont été étudiées, notamment les deux espèces sœurs, R. robustus, sylvatique en Amazonie et R. prolixus majoritairement domiciliée dans toute son aire de répartition. En l’absence de génomes de références suffisamment proches de T. brasiliensis et des 10 espèces de Rhodnius étudiées, leurs transcriptomes ont été assemblés de novo. Les transcriptomes des deux espèces R. prolixus et R. robustus ont été assemblés par alignement sur le génome de R. prolixus. Chez ces différentes espèces de Triatominae étudiées, l’analyse du répertoire des gènes chimiosensoriels codant les OBPs et CSPs (familles multigéniques) comparé à celui d’autres Paranéoptères a montré des expansions géniques pouvant refléter des processus adaptatifs. Par ailleurs, chez les différentes espèces du genre Rhodnius, il existe une corrélation positive entre le nombre de gènes codant les OBPs et la capacité de domiciliation, suggérant l’implication de cette famille de gènes dans l’adaptation au milieu anthropique. Les analyses d’expression différentielle concernant les différentes populations de T. brasiliensis et les espèces R. prolixus/R. robustus ont montré qu’un certain nombre de transcrits sont différentiellement exprimés selon l’environnement dans lequel ont évolué les punaises notamment des gènes chimiosensoriels (OBPs, CSPs) ainsi que des gènes impliqués dans le rythme circadien et le comportement de recherche alimentaire (Takeout), dans la réponse à des stress environnementaux comme des gènes de détoxification (P450, glutathione S-transférase), dans la résistance à des changements climatiques (Heat-shock protéines) et dans la protection du milieu extérieur (protéines cuticulaires). Ce travail a permis de mettre à la disposition de la communauté scientifique des outils performants pour l’étude du processus de domiciliation des vecteurs de la maladie de Chagas (transcriptome, répertoire de gènes). Il a également permis de révéler des gènes qui pourraient être impliqués dans l’adaptation et/ou la plasticité phénotypique en réponse à un changement d’habitat. La compréhension des bases moléculaires de l’adaptation des vecteurs aux habitations humaines ouvre des potentialités de développer des méthodes alternatives de lutte contre les vecteurs qui pourraient être basées sur une perturbation de la communication chimiqueIn Latin America, the bloodsucking bugs (Triatominae, Hemiptera, Reduviidae) are vectors of the parasite Trypanosoma cruzi, which causes Chagas disease. More than five million people are infected. Even if chemical control campaigns are effective against vectors, the disease persists due to the recolonization of human habitations by vectors from natural habitats. Some species have the capacity to adapt to anthroposystems (domiciliation process), while other related species do not. Understanding this capacity to adapt is crucial from an epidemiological perspective to target species at risk to humans. The capacity to adapt to a new habitat could be linked to changes in the repertoire of chemosensory system genes, particularly for odorant binding proteins (OBP) and chemosensory proteins (CSP), which are important proteins to detect various odor stimuli. This study is based on the chemosensory system of Triatominae to document the adaptation process and then the domiciliation of the vectors. Transcriptomic data obtained by high-throughput sequencing were used to annotate and list the chemosensory genes and also to compare their expression in bloodsucking bugs from different habitats. The relationship between changes in these genes in different Triatominae species and their ability to adapt to a new habitat was evaluated. The species T. brasiliensis, which is in the process of domiciliation in Brazil with sylvatic, peridomiciliary and domiciliary populations, and various species of the genus Rhodnius from diverse habitats were studied, especially the two sibling species R. robustus, sylvatic in the Amazonia and R. prolixus mostly domiciliary throughout its geographical range. In the absence of a reference genome for T. brasiliensis, a reference transcriptome via de novo assembly (data 454 and Illumina) was achieved. The reference transcriptomes for 10 Rhodnius species were also established using the de novo assembly method. A genome reference based method on R. prolixus was also used to assemble the transcriptome of the two species R. prolixus and R. robustus. In the different species of the Triatominae studied, the chemosensory gene repertoire showed a high diversity and genic expansions compared to that of others Paraneoptera, which could reflect adaptive process. Furthermore, a positive correlation was shown between the number of OBP genes in Rhodnius species and their domiciliation ability, suggesting that this gene family is involved in the adaptation to anthropogenic environment. The differential expression analyses on the T. brasiliensis populations and the R. prolixus / R. robustus species showed that some transcripts are differentially expressed according to the environment in which the bugs have evolved, especially the chemosensory genes (OBP, CSP) and also genes involved in the circadian rhythm and foraging behavior (Takeout), in the response to environmental stress such as detoxification genes (P450, glutathione S-transferase), in resistance to climatic changes (heat-shock proteins) and in protection from the external environment (cuticular proteins).This work has helped make available to the scientific community powerful tools for studying the process of domiciliation of Chagas disease vectors (transcriptome, gene repertoire). It also revealed genes that could be involved in the adaptation and/or phenotypic plasticity in response to a change in habitat. Understanding the molecular basis of vector adaptation to human dwellings opens the potential to develop new tools to control the disease vectors, for example by disrupting chemical communication
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Loe-mie, Yann. "Contribution bioinformatique à l' analyse du transcriptome humain." Thesis, Aix-Marseille, 2012. http://www.theses.fr/2012AIXM4002/document.
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Dans la première partie j'ai analysé des jeux de données de RNA-seq de transcriptome de petits ARNs disponibles dans les bases de données publiques. J'y ai observé 2 points intrigants : - une grande partie des lectures (bien que courtes) ne peux pas être alignée sur le génome de référence sans discordance et cette fraction non-alignable est parfois majoritaire. - de nombreuses lectures ont des tailles autours de 15-18nt qui ne correspondent à aucun type de petits ARNs connues, cette fraction est également majoritaires dans certains cas. Ces expériences sont souvent conçues pour la détection des miRNAs et l'analyse bioinformatique de ces données passent toujours par un alignement sur le génome de référence ou sur des séquences connues pour donner des petits ARNs. J'ai donc simplement éliminé la contrainte d'alignement dans l'analyse de ces données et effectué un regroupement des lectures par similarité (à la manière des ESTs). Ce regroupement donne une vision différente des données dans laquelle la notion de position génomique n'est plus centrale et ouvre la possibilité d'y découvrir des phénomènes non-standard. La deuxième partie est tirée d'une collaboration avec le laboratoire U675 INSERM. J'ai fait l'analyse bioinformatique des gènes dérégulés par la répression par RNAi du gène REST dans une lignée de neuroblastome de souris (N18). Ce gène est un facteur de transcription qui réprime les gènes neuronaux dans les cellules non neuronales. Ce répertoire de gènes dérégulés est potentiellement constitué de gènes clefs dans la biologie des neuronesIn first part of this thesis I have analysed small RNA-seq transcriptome data. I have noticed : - a large fraction of reads can't be aligned perfectly on reference genome - lot of reads are very short (15-18 nt) and don't match on previously known functionnal small RNAs. These experiments are designed for miRNA discovery and bioinformatics analysis of these data use alignments on genome or on known small RNA precursors sequences. I have eliminated the alignment and I have clustered these sequences. This clustering let me to observe these data with a new view in wich the genomic location is not central and open the gate to discover unconventional events. The second part is the analysis of deregulate genes by the silencing of the gene REST/NRSF in mouse N18 cell line. This gene is a transcription factor and it works as a repressor of neuronal genes in non neuronal cells. This deregulate genes repertoire potentially contains key genes in neuron biology. We found in this repertoire a network of genes centered on SWI/SNF complex including SMARCA2. This gene was associated to schizophrenia (SZ) in association studies and structural variation studies. In this network we found another genes associated to SZ. We show that these genes exhibit positive evolution in primate compare to rodents
Books on the topic "Analyse RNAseq"
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1925-, Cherayil J. D., ed. Transfer RNAs and other soluble RNAs. Boca Raton: CRC Press, 1990.
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Rederstorff, Mathieu. Small non-coding RNAs: Methods and protocols. New York: Humana Press, 2015.
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Kirch, Hans-Hubert. Strukturelle und funktionelle Analyse der Regulation zweier S-RNAse Gene aus Solanum tuberosum L. in transgenen Pflanzen. 1993.
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Scharnhorst, Christina. Analyse kerngenomkodierter messenger RNAs für chloroplastidäre Proteine der Erbse (Pisum sativum L.). [s.l.], 1987.
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Conrad, Frank. Neue Möglichkeiten der enzymatischen Synthese von modifizierten RNAs zur Analyse von Ribozym Reaktionen. 1995.
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Rederstorff, Mathieu. Small Non-Coding RNAs: Methods and Protocols. Springer, 2022.
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Rederstorff, Mathieu. Small Non-Coding RNAs: Methods and Protocols. Springer New York, 2016.
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Rederstorff, Mathieu. Small Non-Coding RNAs: Methods and Protocols. Springer, 2021.
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Nellen, Wolfgang, and Christian Hammann. Small RNAs : : Analysis and Regulatory Functions. Springer London, Limited, 2007.
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(Editor), Wolfgang Nellen, and Christian Hammann (Editor), eds. Small RNAs:: Analysis and Regulatory Functions (Nucleic Acids and Molecular Biology). Springer, 2005.
Find full textBook chapters on the topic "Analyse RNAseq"
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Cagnin, Stefano, Enrico Alessio, Raphael Severino Bonadio, and Gabriele Sales. "Single-Cell RNAseq Analysis of lncRNAs." In Long Non-Coding RNAs in Cancer, 71–90. New York, NY: Springer US, 2021. http://dx.doi.org/10.1007/978-1-0716-1581-2_5.
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Agnelli, Luca, Stefania Bortoluzzi, and Giancarlo Pruneri. "Bioinformatic Pipelines to Analyze lncRNAs RNAseq Data." In Long Non-Coding RNAs in Cancer, 55–69. New York, NY: Springer US, 2021. http://dx.doi.org/10.1007/978-1-0716-1581-2_4.
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Croce, Olivier, and Eric Röttinger. "Creating a User-Friendly and Open-Access Gene Expression Database for Comparing Embryonic Development and Regeneration in Nematostella vectensis." In Methods in Molecular Biology, 649–62. New York, NY: Springer US, 2022. http://dx.doi.org/10.1007/978-1-0716-2172-1_35.
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AbstractThe sea anemone Nematostella vectensis has emerged as a powerful research model to understand at the gene regulatory network level, to what extend regeneration recapitulates embryonic development. Such comparison involves massive transcriptomic analysis, a routine approach for identifying differential gene expression. Here we present a workflow to build a user-friendly, mineable, and open-access database providing access to the scientific community to various RNAseq datasets.
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Sharma, Preeti, B. Sharan Sharma, and Ramtej J. Verma. "A Guide to RNAseq Data Analysis Using Bioinformatics Approaches." In Advances in Bioinformatics, 243–60. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-6191-1_12.
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Hallier, Marc, Svetlana Chabelskaya, and Brice Felden. "Experimental Analyses of RNA-Based Regulations in Bacteria." In Regulatory RNAs, 341–70. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-662-45801-3_14.
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Majerczyk, Charlotte D. "Global Expression Analysis of Quorum Sensing-Controlled Genes by RNAseq." In Methods in Molecular Biology, 177–92. New York, NY: Springer New York, 2017. http://dx.doi.org/10.1007/978-1-4939-7309-5_14.
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Skreka, Konstantinia, Michael Karbiener, Marek Zywicki, Alexander Hüttenhofer, Marcel Scheideler, and Mathieu Rederstorff. "Expression Profiling of ncRNAs Employing RNP Libraries and Custom LNA/DNA Microarray Analysis." In Regulatory RNAs, 229–51. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-662-45801-3_9.
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Ender, Anna, Peter F. Stadler, Mario Mörl, and Sven Findeiß. "RNA Design Principles for Riboswitches that Regulate RNase P-Mediated tRNA Processing." In Riboregulator Design and Analysis, 179–202. New York, NY: Springer US, 2022. http://dx.doi.org/10.1007/978-1-0716-2421-0_11.
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Ender, Anna, Peter F. Stadler, Mario Mörl, and Sven Findeiß. "RNA Design Principles for Riboswitches that Regulate RNase P-Mediated tRNA Processing." In Riboregulator Design and Analysis, 179–202. New York, NY: Springer US, 2022. http://dx.doi.org/10.1007/978-1-0716-2421-0_11.
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Boerner, Susan, and Karen M. McGinnis. "Computational Analysis of LncRNA from cDNA Sequences." In Long Non-Coding RNAs, 255–69. New York, NY: Springer New York, 2016. http://dx.doi.org/10.1007/978-1-4939-3378-5_20.
Full textConference papers on the topic "Analyse RNAseq"
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Oba-Shinjo, Sueli M., Lais C. Cardoso, Roseli da Silva, Antonio M. Lerario, Miyuki Uno, and Suely S. K. Marie. "Abstract 66: CD99 functional analysis in glioblastoma by RNAseq." In Proceedings: AACR 106th Annual Meeting 2015; April 18-22, 2015; Philadelphia, PA. American Association for Cancer Research, 2015. http://dx.doi.org/10.1158/1538-7445.am2015-66.
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Legeai, Fabrice, Susete Alves-Carvalho, Kévin Gazengel, Anthony Bretaudeau, Stéphanie Robin, and Stéphanie Daval. "AskoR, A R Package for Easy RNASeq Data Analysis." In The 1st International Electronic Conference on Entomology. Basel, Switzerland: MDPI, 2021. http://dx.doi.org/10.3390/iece-10646.
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Bhuvaneshwar, Krithika, Coleman I. Smith, Alexander H. Kroemer, Aiwu Ruth He, and Yuriy Gusev. "Abstract 548: RNAseq analysis of infiltrating immune cells in liver cancer." In Proceedings: AACR Annual Meeting 2017; April 1-5, 2017; Washington, DC. American Association for Cancer Research, 2017. http://dx.doi.org/10.1158/1538-7445.am2017-548.
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Bloom, Ryan, Raman Talwar, Jeff Hiken, and Jon Armstrong. "Abstract 1999: Cofactor Paragon: a novel tool to analyze the tumor microenvironment using RNAseq." In Proceedings: AACR Annual Meeting 2017; April 1-5, 2017; Washington, DC. American Association for Cancer Research, 2017. http://dx.doi.org/10.1158/1538-7445.am2017-1999.
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"Genome-wide association and RNAseq analyses of sunflower resistance to Sclerotinia basal stalk rot." In IS-MPMI Congress. IS-MPMI, 2023. http://dx.doi.org/10.1094/ismpmi-2023-51.
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Ryan, Michael C., and John N. Weinstein. "Abstract 1796: Analysis of TCGA RNASeq data using SpliceSeq provides a survey of alternative splicing in cancer." In Proceedings: AACR 104th Annual Meeting 2013; Apr 6-10, 2013; Washington, DC. American Association for Cancer Research, 2013. http://dx.doi.org/10.1158/1538-7445.am2013-1796.
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Toccacieli, Ali, and Manuela Petti. "Identification of Cancer Biomarkers for Multi-class Diagnostics through Network Analysis of RNAseq Data of Tumor-Educated Platelets." In 2022 IEEE International Conference on Bioinformatics and Biomedicine (BIBM). IEEE, 2022. http://dx.doi.org/10.1109/bibm55620.2022.9995086.
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Mavrommatis, Konstantinos, Lauren Intagliata, Garth McGrath, Daniel Civello, and Maureen Cronin. "Abstract 3626: Establishing a robust NGS laboratory workflow and analysis pipeline for FFPE specimen RNAseq to support biopharmaceutical translational research." In Proceedings: AACR 107th Annual Meeting 2016; April 16-20, 2016; New Orleans, LA. American Association for Cancer Research, 2016. http://dx.doi.org/10.1158/1538-7445.am2016-3626.
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Duan, Jing-Hua, Fang-Dong Li, and Hong-Yan Du. "Identification and Sequence Analysis of Four S-RNase Genes in Plumcot (Prunus simonii Carr.)." In 2009 3rd International Conference on Bioinformatics and Biomedical Engineering (iCBBE 2009). IEEE, 2009. http://dx.doi.org/10.1109/icbbe.2009.5162918.
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Singh, Vikram, and Ramakrishna Ramaswamy. "Spectral analysis of long noncoding RNAs." In Annual International Conference on BioInformatics and Computational Biology & Annual International Conference on Advances in Biotechnology. Global Science and Technology Forum, 2011. http://dx.doi.org/10.5176/978-981-08-8119-1_bicb27.
Full textReports on the topic "Analyse RNAseq"
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Lers, Amnon, E. Lomaniec, S. Burd, A. Khalchitski, L. Canetti, and Pamela J. Green. Analysis of Senescence Inducible Ribonuclease in Tomato: Gene Regulation and Function. United States Department of Agriculture, February 2000. http://dx.doi.org/10.32747/2000.7570563.bard.
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Natural leaf senescence has a negative influence on yield. Postharvest induced senescence contributes to the losses of quality in flowers, foliage, and vegetables. Strategies designed to control the senescence process in crop plants could therefore have great applied significance. Senescence is regulated by differential gene expression yet, functional characterization of the genes specifically induced and study of their expression control, is still in its infancy. Study of senescence-specific genes is required to allow identification of regulatory elements participating in senescence-induced expression and thus provide insights into the genetic regulation of senescence. A main feature of senescence is the hydrolysis of macromolecules by hydrolases of various types such as RNases and proteases. This study was aimed a analysis of senescence-inducible RNases in tomato with the following objectives: Isolation of senescence-inducible RNase cDNA clones; Expression analyses of RNase genes during senescence; Identification of sequences required for senescence-induced gene expression; Functional analyses of senescence-inducible RNases. We narrowed our aims somewhat to focus on the first three objectives because the budget we were awarded was reduced from that requested. We have expanded our research for identification senescence-related RNase/nuclease activities as we thought it will direct us to new RNase/nuclease genes. We have also carried out research in Arabidopsis and parsley, which enabled us to draw mire general conclusions. We completed the first and second objectives and have made considerable progress on the remaining two. We have defined growth conditions suitable for this research and defined the physiological and biochemical parameters characteristic to the advance of leaf senescence. In tomato and arabidopsis we have focused on natural leaf senescence. Parsley was used mainly for study of postharvest senescence in detached leaves. We have identified a 41-kD a tomato nuclease, LeNUCI, specifically induced during senescence which can degrade both RNA and DNA. This activity could be induced by ethylene in young leaves and was subjected to detailed analysis, which enabled its classification as Nuclease I enzyme. LeNUCI may be involved in nucleic acid metabolism during tomato leaf senescence. In parsley senescing leaves we identified 2 main senescence-related nuclease activities of 41 and 39-kDa. These activities were induced in both naturally or artificially senescing leaves, could degrade both DNA and RNA and were very similar in their characteristics to the LeNUCI. Two senescence-induced RNase cDNAs were cloned from tomato. One RNase cDNA was identical to the tomato LX RNase while the second corresponded to the LE RNase. Both were demonstrated before to be induced following phosphate starvation of tomato cell culture but nothing was known about their expression or function in plants. LX gene expression was much more senescence specific and ethylene could activate it in detached young leaves. LE gene expression, which could be transiently induced by wounding, appeared to be activated by abscisic acid. We suggest that the LX RNase has a role in RNA catabolism in the final stage of senescence, and LE may be a defense-related protein. Transgenic plants were generated for altering LX gene expression. No major visible alterations in the phenotype were observed so far. Detailed analysis of senescence in these plants is performed currently. The LX promoter was cloned and its analysis is performed currently for identification of senescence-specific regulatory elements. In Arabidopsis we have identified and characterized a senescence-associated nuclease 1 gene, BFN1, which is highly expressed during leaf and stem senescence. BFN1, is the first example of a senescence- associated gene encoding a nuclease I enzyme as well as the first nuclease I cloned and characterized from Arabidopsis. Our progress should provide excellent tools for the continued analysis of regulation and function of senescence-inducible ribonucleases and nucleases in plants. The cloned genes can be used in reverse genetic approaches, already initiated, which can yield a more direct evidence for the function of these enzymes. Another contribution of this research will be in respect to the molecular mechanism, which controls senescence. We had already initiated in this project and will continue to identify and characterize regulatory elements involved in senescence-specific expression of the genes isolated in this work.
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Schuster, Gadi, and David Stern. Integrated Studies of Chloroplast Ribonucleases. United States Department of Agriculture, September 2011. http://dx.doi.org/10.32747/2011.7697125.bard.
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Gene regulation at the RNA level encompasses multiple mechanisms in prokaryotes and eukaryotes, including splicing, editing, endo- and exonucleolytic cleavage, and various phenomena related to small or interfering RNAs. Ribonucleases are key players in nearly all of these post-transcriptional mechanisms, as the catalytic agents. This proposal continued BARD-funded research into ribonuclease activities in the chloroplast, where RNase mutation or deficiency can cause metabolic defects and is often associated with plant chlorosis, embryo or seedling lethality, and/or failure to tolerate nutrient stress. The first objective of this proposal was to examined a series of point mutations in the PNPase enzyme of Arabidopsis both in vivo and in vitro. This goal is related to structure-function analysis of an enzyme whose importance in many cellular processes in prokaryotes and eukaryotes has only begun to be uncovered. PNPase substrates are mostly generated by endonucleolytic cleavages for which the catalytic enzymes remain poorly described. The second objective of the proposal was to examine two candidate enzymes, RNase E and RNase J. RNase E is well-described in bacteria but its function in plants was still unknown. We hypothesized it catalyzes endonucleolytic cleavages in both RNA maturation and decay. RNase J was recently discovered in bacteria but like RNase E, its function in plants had yet to be explored. The results of this work are described in the scientific manuscripts attached to this report. We have completed the first objective of characterizing in detail TILLING mutants of PNPase Arabidopsis plants and in parallel introducing the same amino acids changes in the protein and characterize the properties of the modified proteins in vitro. This study defined the roles for both RNase PH core domains in polyadenylation, RNA 3’-end maturation and intron degradation. The results are described in the collaborative scientific manuscript (Germain et al 2011). The second part of the project aimed at the characterization of the two endoribonucleases, RNase E and RNase J, also in this case, in vivo and in vitro. Our results described the limited role of RNase E as compared to the pronounced one of RNase J in the elimination of antisense transcripts in the chloroplast (Schein et al 2008; Sharwood et al 2011). In addition, we characterized polyadenylation in the chloroplast of the green alga Chlamydomonas reinhardtii, and in Arabidopsis (Zimmer et al 2009). Our long term collaboration enabling in vivo and in vitro analysis, capturing the expertise of the two collaborating laboratories, has resulted in a biologically significant correlation of biochemical and in planta results for conserved and indispensable ribonucleases. These new insights into chloroplast gene regulation will ultimately support plant improvement for agriculture.
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Lers, Amnon, and Pamela J. Green. LX Senescence-Induced Ribonuclease in Tomato: Function and Regulation. United States Department of Agriculture, September 2003. http://dx.doi.org/10.32747/2003.7586455.bard.
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Natural leaf senescence, which occurs even when growth conditions are near optimal, has a negative influence on yield. Postharvest induced senescence contributes to the losses of quality in flowers, foliage, and vegetables. Strategies designed to control the senescence process in crop plants could therefore have great applied significance. However, the successful design of such strategies requires a better insight into the senescence machinery and control in higher plants. A main feature of senescence is the hydrolysis of macromolecules by hydrolases of various types such as ribonucleases (RNases) and proteases. Previously we had identified and characterized the tomato LX RNase gene demonstrating its transcript to be highly and specifically induced during senescence. This reported study was focused on LX but also had broadened our research to other senescence-associated nucleic acids degrading enzymes to learn about their function and the regulation of their encoding genes. Beside tomato we used parsley and Arabidopsis for the study of: the bi-functional nuclease which has a role in senescence. The study of different senescence- associated nucleases in few plant systems will allow a more general view on function and regulation of these enzymes in senescence. The specific original proposed objectives included: 1. Study the consequences of alterations in LX RNase level on tomato leaf senescence and general development; 2. Analyze stimuli which may participate in senescence-specific activation of the LX gene; 3. Clone the senescence-associated BFNI nuclease gene homologue from tomato. 4. Further characterize the sequences required for senescence-specific gene expression. Homozygous transgenic plants in which LX gene was either inhibited or over-expressed were generated. In both of these LX mutated plants no major phenotypic consequences were observed, which may suggests that LX is not essential for plant growth under optimal growth conditions. Lack of any abnormalities in the LX over-expressing lines suggests that special system exist to allow function of the RNase only when needed. Detailed analyses of growth under stress and consequences to RNA metabolism are underway. We have analyzed LX expression on the protein level demonstrating that it is involved also in petal senescing. Our results suggest that LX is responding to complex regulation involving developmental, organ dependent factors and responds differently to hormonal or environmental stimuli in the different plant organs. The cloned 1.4 kb promoter was cloned and its analysis revealed that probably not all required elements for senescence induction are included. Biochemical analysis of senescence-associated be-functional nucleases in the different plants, tomato, parsley and Arabidopsis, suggests they belong to a sub-class within the type I plant nucleases. The parsley PcNUC1/2 nuclease protein was purified from senescing leaves its and activity was studied in vitro revealing endo-, double strand, nucleolytic activity and exo-nucleolytic activity. Its encoding gene was cloned and found to be induced on the mRNA level. The promoter of the related Arabidopsis BFNI nuclease was shown in both tomato and Arabidopsis to be able and direct senescence-specific expression suggesting that, at least part, the gene is regulated on the transcriptional level and that the mechanism for this senescence-specific regulation is conserved between different plants. Few plants in which the BFNI gene is mutated were identified which are subjected now to detailed analysis. Our results suggest that the senescence-related nucleic acid degrading enzymes share similarities in both function and regulation between different plants and possibly have important functions in processes un-related to senescence. Still, the function of these enzymes, at least in some cases is not essential to plant development under optimal growth conditions. We are now at the stage which permits in depth investigation of the specific functions and mode of molecular regulation of senescence-associated nucleases with the aid of the research tools developed. The isolated senescence-specific promoter, shown to be active in heterologous plant system, could be utilized in agricultural-related biotechnological applications for retardation of senescence.
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Eyal, Yoram, and Sheila McCormick. Molecular Mechanisms of Pollen-Pistil Interactions in Interspecific Crossing Barriers in the Tomato Family. United States Department of Agriculture, May 2000. http://dx.doi.org/10.32747/2000.7573076.bard.
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During the evolutionary process of speciation in plants, naturally occurring barriers to reproduction have developed that affect the transfer of genes within and between related species. These barriers can occur at several different levels beginning with pollination-barriers and ending with hybrid-breakdown. The interaction between pollen and pistils presents one of the major barriers to intra- and inter-specific crosses and is the focus of this research project. Our long-term goal in this research proposal was defined to resolve questions on recognition and communication during pollen-pistil interactions in the extended tomato family. In this context, this work was initiated and planned to study the potential involvement of tomato pollen-specific receptor-like kinases (RLK's) in the interaction between pollen and pistils. By special permission from BARD the objectives of this research were extended to include studies on pollen-pistil interactions and pollination barriers in horticultural crops with an emphasis on citrus. Functional characterization of 2 pollen-specific RLK's from tomato was carried out. The data shows that both encode functional kinases that were active as recombinant proteins. One of the kinases was shown to accumulate mainly after pollen germination and to be phosphorylated in-vitro in pollen membranes as well as in-vivo. The presence of style extract resulted in dephosphorylation of the RLK, although no species specificity was observed. This data implies a role for at least one RLK in pollination events following pollen germination. However, a transgenic plant analysis of the RLK's comprising overexpression, dominant-negative and anti-sense constructs failed to provide answers on their role in pollination. While genetic effects on some of the plants were observed in both the Israeli and American labs, no clear functional answers were obtained. An alternative approach to addressing function was pursued by screening for an artificial ligand for the receptor domain using a peptide phage display library. An enriched peptide sequence was obtained and will be used to design a peptide-ligand to be tested for its effect o pollen germination and tube growth. Self-incompatibility (SI) in citrus was studied on 3 varieties of pummelo. SI was observed using fluorescence microscopy in each of the 3 varieties and compatibility relations between varieties was determined. An initial screen for an S-RNase SI mechanism yielded only a cDNA homologous to the group of S-like RNases, suggesting that SI results from an as yet unknown mechanism. 2D gel electrophoresis was applied to compare pollen and style profiles of different compatibility groups. A "polymorphic" protein band from style extracts was observed, isolated and micro-sequenced. Degenerate primers designed based on the peptide sequence date will be used to isolate the relevant genes i order to study their potential involvement in SI. A study on SI in the apple cultivar Top red was initiated. SI was found, as previously shown, to be complete thus requiring a compatible pollinator variety. A new S-RNase allele was discovered fro Top red styles and was found to be highly homologous to pear S-RNases, suggesting that evolution of these genes pre-dated speciation into apples and pears but not to other Rosaceae species. The new allele provides molecular-genetic tools to determine potential pollinators for the variety Top red as well as a tool to break-down SI in this important variety.
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Lers, Amnon, and Pamela J. Green. Analysis of Small RNAs Associated with Plant Senescence. United States Department of Agriculture, March 2013. http://dx.doi.org/10.32747/2013.7593393.bard.
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Senescence is an agriculturally significant process due to its negative impact to crop yield and postharvest quality. The genetic regulatory systems controlling senescence induction and progress respond to both developmental and environmental stress signals and involve numerous gene expression changes. Knowledge about the key molecular factors which control senescence is very limited. MicroRNAs (miRNAs) are a class of small RNAs which typically function by guiding cleavage of target messenger RNAs. They have been shown to play major roles in a variety of plant processes including development, responses to environmental stresses, and senescence. The long-term goal of this work is to elucidate roles of small RNAs associated with plant senescence. The hypothesis underlying this research is that miRNA-mediated regulation makes important contributions to the senescence process in plants. Specific, original research objectives included: 1) Profiling of small RNAs from senescing plants; 2) Data Analysis and public access via a user-friendly web interface; 3) Validation of senescence-associated miRNAs and target RNAs; 4) Development of transgenic plants for functional analysis of miRNAs in Arabidopsis. Major revisions made in the research compared to the original work plan included 1) Exclusion of the planned work with tomato as recommended by the BARD review panel; 2) Performing miRNA study also in senescing Arabidopsis siliques, in addition to senescing leaves. To identify senescenceregulation of miRNAs in Arabidopsis thaliana, eight small RNA libraries were constructed and sequenced at four different stages of development and senescence from both leaves and siliques, resulting in more than 200 million genome-matched sequences. Parallel Analysis of RNA Ends (PARE) libraries, which enable the large-scale examination of miRNA-guided cleavage products, were also constructed and sequenced, resulting in over 750 million genome-matched sequences. These massive datasets lead to the identification of new miRNAs, as well as new regulation of known miRNAs and their target genes during senescence, many of which have established roles in nutrient responsiveness and cell structural integrity. In keeping with remobilization of nutrients thought to occur during senescence, many miRNAs and targets had opposite expression pattern changes between leaf and silique tissues during the progression of senescence. Taken together, these findings highlight the integral role that miRNAs may play in the remobilization of resources and alteration of cellular structure that is known to occur in senescence. Experiments were initiated for functional analysis of specific senescence-associated miRNAs and respective target genes. Transgenic Arabidopsis plants were generated in which miR408, found in this study to be significantly induced in leaf senescence, was over-expressed either constitutively or under a senescence-specific promoter. These plants are currently being characterized for any altered phenotypes. In addition T-DNA knock out mutants for various target genes identified in this research are being analyzed. This work provides insights about specific miRNAs that contribute to leaf and silique senescence. The knowledge generated may suggest new strategies to monitor and alter the progression of senescence in crops for agricultural improvement.
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Glazer, Itamar, Alice Churchill, Galina Gindin, and Michael Samish. Genomic and Organismal Studies to Elucidate the Mechanisms of Infectivity of Entomopathogenic Fungi to Ticks. United States Department of Agriculture, January 2013. http://dx.doi.org/10.32747/2013.7593382.bard.
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The overall goal of this research was to elucidate the factors affecting early development of Metarhizium spp. (previously named M. anisopliae) on ticks or tick cuticle extracts and the molecular basis of these early infection processes. The original objectives were: 1. Characterize the pre-penetration events (adhesion, germination and appressorium formation) of spores of M. anisopliae strains with high or low virulence during tick infection. 2. Create GFP-expressing strains of M. anisopliae tick pathogens having high and low virulence to compare their progress of infection by microscopy. 3. Use microarray analyses, primarily with existing M. anisopliae EST sequences in GenBank, to identify and characterize fungal genes whose expression is regulated in response to host cuticle extracts. Objective 3 was later modified (as approved by BARD) to use RNAseq to characterize the early stages of fungal gene expression during infection of intact host cuticles. This new method provides a massively larger and more informative dataset and allows us to take advantage of a) recently published genomes of Metarhizium robertsii and M. acridum for RNAseq data analysis, and b) newly developed and highly efficient cDNA sequencing technologies that are relatively low cost and, therefore, allow deep sequencing of multiple transcriptome samples. We examined pre-penetration and penetration events that differentiate high and low virulence strains of Metarhizium spp., focusing on spore adhesion, germination, appressorium formation, and penetration of tick integuments. Initiation of fungal infection was compared on susceptible and resistant tick species at different tick developmental stages. In vitro studies comparing the effects of protein and fatty acid profiles from tick cuticle extracts demonstrated that resistant tick cuticles contain higher concentrations of specific lipids that inhibit fungal development than do susceptible tick cuticles, suggesting one mechanism of Ixodidae resistance to fungal entomopathogens (Objective 1). We used molecular markers to determine that the three M. anisopliae strains from Israel that we studied actually were three distinct species. M. brunneum is highly virulent against the tick Rhipicephalus annulatus, M. pingshaense and M. robertsii are intermediate in virulence, and M. majus is of low virulence. We transformed all four Metarhizium species to express GFP and used them in pathogenicity assays against diverse tick species. Key findings were that a) resistant ticks inhibit Metarhizium infection prior to hemocoel invasion by reducing fungal viability on the cuticle surface (Objective 2), as was supported by the in vitro studies of Objective 1, and b) Metarhizium kills susceptible ticks after cuticle penetration but prior to hemocoel colonization. Transcriptome studies of the most virulent species, M. brunneum, are in progress and include analyses of ungerminated conidia and conidia germination and development on a low nutrient medium or on susceptible R. annulatus exoskeleton (Objective 3). We anticipate these studies will contribute to identifying fungal genetic factors that increase virulence and speed of kill and may help reveal tick chemistries that could be included in biocontrol formulations to increase efficacy. Methodologies developed to screen tick cuticle extracts for ability to support conidia germination and development may help in the selection of wild fungi with increased virulence against resistant ticks. The overall knowledge gained should contribute not only to the improvement of tick control but also to the control of other blood-sucking arthropods and related plant pests. Use of bio-based agents for controlling arthropods will contribute to a healthier, more sustainable environment and serve a growing number of organic food farmers.
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Ori, Naomi, and Mark Estelle. Specific mediators of auxin activity during tomato leaf and fruit development. United States Department of Agriculture, January 2012. http://dx.doi.org/10.32747/2012.7597921.bard.
Full textAbstract:
The plant hormone auxin is involved in numerous developmental processes, including leaf and fruit development. The tomato (Solanumlycopersicum) gene ENTIRE (E) encodes an auxin-response inhibitor from the Aux/IAA family. While most loss-offunction mutations in Aux/IAA genes are similar to the wild type due to genetic redundancy, entire (e) mutants show specific effects on leaf and fruit development. e mutants have simple leaves, in contrast to the compound leaves of wild type tomatoes. In addition, e plants produce parthenocarpic fruits, in which fruit set occurs independently of fertilization. The aim of this research program was to utilize the e mutation to identify and characterize genes that mediate the specific effect of auxin in leaf and fruit development. The specific objectives of the project were to: 1. Characterize and map modifiers of the e leaf phenotype. 2. Characterize and map suppressors of the e fruit phenotype. 3. Dissect the developmental specificity of the E gene. 4. Examine the effect of fruit-overexpression of identified genes on fruit set and seed production. To identify mediators of auxin in leaf development, we mainly focused on one mutant, crawling elephant (crel, previously called t282), which showed substantial suppression of the e phenotype and other auxin-relatedphenotypes. We have identified the CREL gene as a homolog of the Arabidopsis VRN5 gene, involved in recruiting polycomb silencing complexes to specific targets. We showed that CREL affects auxin sensitivity in tomato. Suppressors of the e fruit phenotype have been further characterized and selected for more profound effects. Expression profiling by RNAseq was used to analyze the effect of e as well as crel on gene expression in leaves and fruits. This analysis has identified putative E and CREL targets. We have initiated studies to assess the role of some of these targets in flower and fruit development. The research has identified potential mediators of auxin response in leaf, flower and fruit development.
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Zhong, xiaoling. Diagnostic Significance of Noncoding RNAs in Kawasaki Disease: A Systematic Review and Meta-Analysis. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, October 2022. http://dx.doi.org/10.37766/inplasy2022.10.0035.
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Xu, Jianhao, Fang Cao, Yongwei Hu, and Zaichang Chen. Circulating long noncoding RNAs as potential biomarkers for stomach cancer: A systematic review and meta-analysis. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, February 2021. http://dx.doi.org/10.37766/inplasy2021.2.0079.
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Zhong, Xiaoling, Qin Guo, Jing Zhao, Yinyue Li, Xue Li, Min Ren, and Min Shu. Diagnostic significance of long non-coding RNAs expression in TB patients: a systematic review and meta-analysis. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, July 2020. http://dx.doi.org/10.37766/inplasy2020.7.0043.
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