Dissertations / Theses on the topic 'Reticular stress'
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Kraupner, Nicolas. "Conception d'outils pharmacologiques pour comprendre le rôle de l'Insulin Degrading Enzyme (IDE) dans la gestion du stress protéotoxique." Electronic Thesis or Diss., Université de Lille (2022-....), 2022. http://www.theses.fr/2022ULILS039.
Insulin Degrading Enzyme (IDE) is a ubiquitous zinc metalloprotease found in extracellular and intracellular compartments. IDE is involved in the degradation of physiologically important peptides such as insulin and other amyloidogenic peptides. However, it is remarkably conserved in species and tissues that do not produce these substrate peptides. This observation suggests an important role for IDE, not fully identified, and not only correlated with its catalytic activity. IDE is an enzyme for which new biological implications continue to be discovered and its characterization is necessary to better understand these new physiological or pathological roles. In particular, in the last few years studies have highlighted the link between IDE and endoplasmic reticulum (ER) stress, notably in the ubiquitin-proteasome pathway and the Unfolded Protein Response (UPR) pathway.The unit has recently patented the use of a first series of IDE inhibitors, with the BDM 44768 as lead compound, to boost cytotoxics, including proteasome inhibitors such as carfilzomib, one of the gold standard treatments for multiple myeloma.Based on this chemical series of BDM 44768 and guided by the crystallographic structure of our compounds in IDE, several modulations were performed on four different parts of the pharmacophore as well as the development of a macrocyclic series. These pharmacomodulations resulted in several potent molecules with nanomolar activity and pharmacokinetic properties that could allow their use in in vivo models.In order to explore the functions and involvement of IDEs in different cellular processes, this thesis also allowed the design and synthesis of different chemical exploration tools. First, following the different binding modes of our molecules in IDE, two series of PROTAC probes were synthesized. Their biological evaluations revealed that they do not induce the degradation of IDE but of two other proteins, a protein homologous to IDE, pitrilysin, and DPP3, a dipeptidyl peptidase. Finally, two fluorescent probes, that still need to be optimized, were designed and synthesized in order to be able to follow the localization of IDE within the cell and more particularly in the endoplasmic reticulum with the aim of correlating this localization over time with the effects on the UPR proteins and reticular stress.Thus, during this thesis, valuable results to design future chemical tools to study IDE and to elucidate the different roles of this protein were obtained. In addition, several potent small molecules modulating the activity of IDE were synthesized in order to address the different therapeutic needs associated with this target
Johnson, Charlotte. "Targeting endoplasmic reticulum stress and autophagy in cancer." Thesis, Cardiff University, 2015. http://orca.cf.ac.uk/84379/.
Chan, Cheuk-wing Wilson. "ER stress in the pathogenesis of osteochondrodysplasia." Click to view the E-thesis via HKUTO, 2009. http://sunzi.lib.hku.hk/hkuto/record/B43085192.
Zachariah, Matshediso. "High selenium induces endothelial dysfunction via endoplasmic reticulum stress." Thesis, University of Surrey, 2017. http://epubs.surrey.ac.uk/845246/.
Voyias, Philip D. "Regulation of endoplasmic reticulum stress in adipose tissue metabolism." Thesis, University of Warwick, 2015. http://wrap.warwick.ac.uk/74256/.
Furmanik, Malgorzata. "The role of endoplasmic reticulum stress in vascular calcification." Thesis, King's College London (University of London), 2015. http://kclpure.kcl.ac.uk/portal/en/theses/the-role-of-endoplasmic-reticulum-stress-in-vascular-calcification(a0138614-e3d8-42ef-9cbf-02a01f6e6eaf).html.
Darling, Nicola Jane. "Regulation of ER stress-induced cell death by the ERK1/2 signalling pathway." Thesis, University of Cambridge, 2015. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.708709.
Preston, Amanda Miriam Clinical School St Vincent's Hospital Faculty of Medicine UNSW. "The role of endoplasmic reticulum stress in beta-cell lipoapoptosis." Publisher:University of New South Wales. Clinical School - St Vincent's Hospital, 2008. http://handle.unsw.edu.au/1959.4/41231.
Katsoulieris, Elias. "Oxidatives and Endoplasmic Reticulum Stress in Kidney Priximal Tubule Cells." Thesis, University of Brighton, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.506517.
Niederreiter, Lukas. "Endoplasmic reticulum (ER) stress transcription factor Xbp1 in intestinal tumourigenesis." Thesis, University of Cambridge, 2015. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.708846.
Gaifem, Joana Filipa Madureira. "" Role Of In Endoplasmic Reticulum Stress Response In Sacccharoromyces cerevisiae "." Master's thesis, Instituto de Ciências Biomédicas Abel Salazar, 2011. http://hdl.handle.net/10216/56926.
Bonilla, Myriam. "Endoplasmic reticulum stress linked to calcium signaling in saccharomyces cerevisiae." Available to US Hopkins community, 2003. http://wwwlib.umi.com/dissertations/dlnow/3080627.
Das, Indrajit. "Therapeutic Targeting of Endoplasmic Reticulum Stress in Inflammatory Bowel Disease." Thesis, Griffith University, 2012. http://hdl.handle.net/10072/365999.
Thesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Biomolecular and Physical Sciences
Science, Environment, Engineering and Technology
Full Text
Gendrisch, Fabian [Verfasser], and Stefan F. [Akademischer Betreuer] Martin. "The role of endoplasmic reticulum stress responses in contact dermatitis." Freiburg : Universität, 2018. http://d-nb.info/1211956318/34.
Martin, Rachel E. "Targeted sensors to monitor oxidative stress in the endoplasmic reticulum." Thesis, University of Glasgow, 2014. http://theses.gla.ac.uk/5884/.
Gaifem, Joana Filipa Madureira. "" Role Of In Endoplasmic Reticulum Stress Response In Sacccharoromyces cerevisiae "." Dissertação, Instituto de Ciências Biomédicas Abel Salazar, 2011. http://hdl.handle.net/10216/56926.
Wang, Yongchao. "THE ROLE OF ENDOPLASMIC RETICULUM STRESS IN ETHANOL-INDUCED NEURODEGENERATION." UKnowledge, 2019. https://uknowledge.uky.edu/pharmacol_etds/33.
Kerbiriou, Mathieu. "Étude du stress du reticulum endoplasmique (RE) dans la mucoviscidose." Brest, 2008. http://www.theses.fr/2008BRES3204.
Cystic fibrosis is a genetic disease caused by mutations in the CFTR (cystic fibrosis transmenbrane conductance regulator) chloride channel gene. The most common of these mutations is the deletion of the phenylalanine at position 508 (delF508) of the protein which leads to the expression of a misfiled protein which is retained in the endoplasmic reticulum (ER). Now, the accumulation of misfiled proteins in the ER induces a stress and the triggering of an adaptative response called UPR (unfolded protein response) which induces among other things the decrease of protein synthesis and the augmentation of proteins degradation capacities. Moreover, UPR can be induced by exogenous factors which are present in cystic fibrosis (CF) such as inflammation and infections. Thus, we wanted to know whether delF508-CFTR could induce a stress and trigger 13FR. Hi the first part of this thesis, we show for the first time that UPR is triggered in delF508-CFTR expressing cells. Moreover, we have observed that the selective inhibition of a component of UFR (ATF6, activating transcription factor 6) allows a partial restauration of the delF508-CFTR channel activity. UFR can also land to apoptosis during a prolonged or too intense ER stress. Now, apoptosis is altered in CF. Thus, we compared ER stress-induced apoptosis between Wt (Wild type) and CF cells. In the second part of this thesis, we show that the apoptotic cascade involving calcium, m-calpain, caspase 12 and caspase 3 is altered in delF508-CFTR expressing cells, suggesting its implication in CF physiopathology. These results show that UPR is involved in CF physiopathology and that its regulation is a potential therapeutic target
Mihai, Adina Daniela. "Obesity-related factors involved in endoplasmic reticulum stress induction in adipocytes." Thesis, Durham University, 2015. http://etheses.dur.ac.uk/11637/.
Park, Soon Hyang. "The role of endoplasmic reticulum stress signaling in isolated islet apoptosis." Thesis, McGill University, 2009. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=32257.
Un obstacle majeur lors de la transplantation des îlots pancréatiques est la perte des cellules β lors de la procédure d'isolation. En effet, lors de ce processus, les îlots sont exposés à divers stress cellulaires incluant ceux qui induisent un stress au niveau du réticulum endoplasmique (RE). Cette étude porte donc sur la signalisation menant à l'apoptose en réponse au stress du RE sur les îlots isolés. L'activation d'eIF2α, de JNK1 et de l'épissage de XBP1 qui est suivi par une augmentation de l'activité de la caspase-3 fut observées sur des îlots isolés chez l'humain. L'absence de la protéine tyrosine phosphatase 1B (PTP1B) avait précédemment été démontrée comme pouvant contribuer à la diminution de la signalisation déclenchée par le stress du RE et l'apoptose chez les fibroblastes. Malgré des résultats encourageants concernant l'utilisation d'un inhibiteur et d'un miRNA qui ciblent PTP1B, un lien concluant entre l'inhibition de cette enzyme et l'amélioration de la survie des cellules β n'a pas été observé Cette étude fournit la première évidence qui clarifie le rôle de la signalisation induite par le stress du RE lors de l'apoptose des îlots pancréatiques. De plus, elle pourrait résulter en une nouvelle approche thérapeutique pour augmenter la survie des cellules β lors de la transplantation d'îlots.
Hühn, Martin [Verfasser]. "Endoplasmic Reticulum (ER)-stress signalling in the alveolar epithelium / Martin Hühn." Gießen : Universitätsbibliothek, 2013. http://d-nb.info/1065395310/34.
Mahmood, Ahsan. "Role of SLMAP in Endoplasmic Reticulum Stress and Unfolded Protein Response." Thèse, Université d'Ottawa / University of Ottawa, 2013. http://hdl.handle.net/10393/24399.
Nakano, Kenzo. "Chloroquine induces apoptosis in pancreatic neuroendocrine neoplasms via endoplasmic reticulum stress." Doctoral thesis, Kyoto University, 2021. http://hdl.handle.net/2433/263541.
Brown, Max Adam. "Investigation of how endoplasmic reticulum stress causes insulin resistance and neuroinflammation." Thesis, Durham University, 2015. http://etheses.dur.ac.uk/11438/.
Fonseca, Sonya G. "Role of WFS1 in Regulating Endoplasmic Reticulum Stress Signaling: A Dissertation." eScholarship@UMMS, 2009. https://escholarship.umassmed.edu/gsbs_diss/414.
Tan, Zhijia, and 谭志佳. "Molecular analyses of chondrocyte differentiation and adaptation to ER stress." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2013. http://hdl.handle.net/10722/209435.
published_or_final_version
Biochemistry
Doctoral
Doctor of Philosophy
Sarkar, Deboleena Dipak. "Potential Role Of Endoplasmic Reticulum Redox Changes In Endoplasmic Reticulum Stress And Impaired Protein Folding In Obesity-Associated Insulin Resistance." Diss., The University of Arizona, 2013. http://hdl.handle.net/10150/306999.
Shank, Karin Janel. "Coordination of the endoplasmic reticulum stress response and lipid metabolism in plants." NCSU, 2000. http://www.lib.ncsu.edu/theses/available/etd-20000729-161702.
The endoplasmic reticulum (ER) stress response is an important signal transduction pathway that senses ER stress caused by misfolded proteins or increased secretory protein traffic and induces molecular chaperone expression to counter such stress. The response has been well characterized in yeast and mammals where it has been associated with a variety of metabolic pathways, such as phospholipid biosynthesis, translational inhibition, and ER associated degradation. In plants, however, the connections of the ER stress response with metabolic pathways other than those involved in chaperone biosynthesis have not been characterized. This study defines a connection between phospholipid synthesis and the ER stress response in plants. Two model systems were used to characterize this association, the maize mutant floury-2 (fl2), which displays a unique endosperm specific ER stress response mediated by a mutant seed storage protein, and soybean cell cultures treated with the pharmacological agents tunicamycin (Tm) or azetidine-2-carboxylic acid (AZC). These chemicals interfere with normal protein synthesis and processing events, and are well characterized inducers of ER stress responses in animals, plants, and yeast. Investigation of both of these systems revealed a common theme; induction of the ER stress response in plants leads to increased activity and/or expression of various phospholipid biosynthetic enzymes. These increases were correlated with previously described amplifications in expression of the molecular chaperones binding protein (BiP), protein disulfide isomerase (PDI) and calreticulin. Certain aspects of the ER stress response may be unique to plants. A seed-specific result of the ER stress response was the accumulation of triacylglycerols (TG), which specifically increased in the endosperm of the fl2 mutant to more than 3-fold higher than normal endosperm levels by 36 days after pollination (DAP). The maize and soybean systems used in this study provide a starting point for the investigation of other details of the ER stress response in plants and represent important tools for future efforts to define the components of the signaling pathway.
Misiewicz, Michael. "Identification of a novel endoplasmic reticulum stress response element regulated by XBP1." Thesis, McGill University, 2013. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=116963.
La protéine Prion (PrP), qui est l'agent infectieux causant les encéphalopathies transmissibles, n'a pas toujours un rôle bien identifié dans la cellule, malgré 30 ans de recherche sur sa fonction physiologique. Cependant, de plus en plus de preuves commencent à impliquer PrP dans des fonctions de protection dans la cellule. Dans cette étude, nous avons étudié la régulation peu connue du promoteur du gène qui encode PrP (PRNP). Par homologie de séquence, nous avons identifié un nouvel élément dans le promoteur de PRNP qui ressemble à l'Endoplasmic Reticulum Stress Response Element (ERSE). Ce nouvel ERSE (appelé ERSE-26) est capable de réguler l'expression du PRNP de manière endogène en réponse au stress dans le réticulum endoplasmique (RE). Pour savoir si l'ERSE-26 existe ailleurs dans le génome et afin de trouver d'autres gènes régulé avec PRNP, nous avons fait une recherche bioinformatique dans le génome entier. Nous avons identifié 38 gènes contenant aussi un ERSE-26 dans leur promoteur. Afin de confirmer l'expression de ces gènes en réponse au stress ER, nous avons traité des cultures de neurones primaires humains et des cellules MCF-7 avec les activateurs du stress RE Brefeldin A, Tunicamycin et Thapsigargin, puis vérifié l'expression par Transcriptase Inverse PCR (RT-PCR) ou RT-PCR quantitative. Nous avons montré l'induction des gènes GADD45B, SESN2 et PRNP, et d'autres ont montré une tendance positive. Ensuite, un plasmide rapporteur luciferase contenant l'ERSE-26 seulement a été utilisé pour montrer que le facteur de transcription du stress ER XBP1 est un facteur de transcription responsable pour l'activité de l'ERSE-26. Finalement, nous avons fait une recherche dans la littérature afin de déterminer la fonction des gènes contenant ERSE-26. Les gènes répondant au stress oxydant et les gènes pro-survie étaient parmi les gènes ERSE-26, et aussi ont été le plus induits, soutenant le rôle protecteur du PrP dans la cellule.
Lari, Federica. "Resolution of proteotoxic stress in the endoplasmic reticulum by ubiquitin ligase complexes." Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:871e0484-3de4-4d0d-8206-4af16a8b743e.
Pallet, Nicolas. "Rôle du stress du reticulum endoplasmique dans la néphrotoxicité de la ciclosporine." Paris 5, 2009. http://www.theses.fr/2009PA05S007.
The molecular mechanisms by which cyclosporine (CsA) induces chronic nephrotoxicity remain poorly understood. Previous transcriptomic study suggested that CsA might induce endoplasmic reticulum (ER) stress in human tubular cells. The aim of this study was to characterize the features of the tubular ER stress induced by CsA and to investigate its consequences on cell differentiation and viability. We confirmed that CsA is responsible for ER stress in vitro in primary cultures of human tubular cells and in vivo in the rat. CsA and other ER stress inducers were responsible for epithelial phenotypic changes (EPCs) leading to the generation of protomyofibroblasts, independently of TGF-0 signaling. RNA interference directed against cyclophilin A gene supported the role of its inhibition in the ER stress and EPCs induced by CsA. Salubrinal, a selective inhibitor of eIF2oc dephosphorylation known to protect cells from ER stress, significantly reduced EPCs and cytotoxicity induced by CsA. Finally, ER stress detection in tubular cells on 56 kidney transplant protocol biopsies was significantly associated with tubular atrophy and interstitial fibrosis. In conclusion, we describe here a new mechanism that initiates dedifferentiation and tubular cell death during CsA treatment, and that may be implicated in the occurrence of the tubulo-interstitial lesions observed in CsA chronic nephrotoxicity. These results provide an interesting framework for further nephroprotective therapies by targetting ER stress
Levet, Clémence. "Mild Endoplasmic Reticulum Stress Protects From Cell Death : The Role Of Autophagy." Thesis, Lyon 1, 2012. http://www.theses.fr/2012LYO10209.
The last years have been very successful in identifying mechanisms, which control apoptosis in metazoan. However, the regulation of cell death in specific cell type remains to be determined. An excess of neuron apoptosis can lead to neurodegenerative diseases such as Huntington, Parkinson or Alzheimer diseases. Neurodegeneration is usually associated to Endoplasmic Reticulum stress (ER stress), autophagy or oxidative stress. However, the role of these mechanisms in the regulation of neurodegeneration is not clearly established. To test the role of ER stress in the regulation of neuronal death, we used several models of neurodegeneration in Drosophila and mammals. First, we have shown that the genetic induction of ER stress protected photoreceptors of the Drosophila eye from apoptosis. Then, we have shown that the protective effect of ER stress is conserved in both Drosophila and mouse models of Parkinson disease. In order to characterize the protective effect of ER stress, we have studied the activation of protective mechanisms upon ER stress. We have shown that in the Drosophila retina, ER stress can induce an anti-oxidative response and autophagy. Interestingly, autophagy is only activated in presence of both ER stress and cell death signal. We have focused on the role of autophagy in the protective effect of ER stress. We have shown that the activation of autophagy was required for the protective effect of ER stress. Thus, we have shown that ER stress response is not only involved in the reduction of misfolded protein accumulation, but can also protect neurons form cell death by activating autophagy
Page, Lindsay N. "Endoplasmic Reticulum Stress Contributes to Cyclosporine A-Induced Lens Epithelial Cell Loss." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1585948655611948.
Bicknell, Alicia Anne. "Two MAP kinases regulate novel aspects of the endoplasmic reticulum stress response." Diss., [La Jolla] : University of California, San Diego, 2009. http://wwwlib.umi.com/cr/ucsd/fullcit?p3369545.
Title from first page of PDF file (viewed September 14, 2009). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references (p. 160-185).
Pino, Steven C. "Role of Endoplasmic Reticulum Stress Response Signaling in T Cells: A Dissertation." eScholarship@UMMS, 2008. https://escholarship.umassmed.edu/gsbs_diss/381.
Thomas, Sally Edwina. "The role of cell cycle checkpoints in the survival of endoplasmic reticulum stress." Thesis, University of Cambridge, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.608043.
Chan, Cheuk-wing Wilson, and 陳卓榮. "ER stress in the pathogenesis of osteochondrodysplasia." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2009. http://hub.hku.hk/bib/B43085192.
Adolph, Timon Erik. "ER stress converts autophagy defects into intestinal inflammation." Thesis, University of Cambridge, 2015. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.708683.
Gwiazda, Kamila Sabina. "Role of endoplasmic reticulum calcium stores in beta-cell ER stress and lipotoxicity." Thesis, University of British Columbia, 2009. http://hdl.handle.net/2429/12553.
Tillman, Erik J. (Erik James). "Genetic analysis of endoplasmic reticulum homeostasis during stress and infection of Caenorhabditis elegans." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/119917.
This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references.
Animals experience intrinsic and extrinsic stressors throughout development and adulthood. To maintain cellular and organismal homeostasis, eukaryota and metazoa rely on conserved, integrated stress response pathways. Throughout its life cycle, the free-living nematode Caenorhabditis elegans encounters diverse microbial taxa, including both nutritional and pathogenic species. Intestinal infection with the pathogenic bacteria Pseudomonas aeruginosa induces a transcriptional innate immune response leading to the secretion of immune effector molecules into the intestinal lumen. Previous work has demonstrated a critical role for the endoplasmic reticulum unfolded protein response in surviving immune activation during larval development. Specifically, the most ancient IRE-1/XBP-1 branch of the UPR is required for larval development during immune activation, whether or not pathogen is present. To understand additional mechanisms regulating ER homeostasis in C. elegans, we conducted a forward genetic screen and identified suppressors of xbp-1 mutant larval lethality on P. aeruginosa. In this work, I outline the characterization of several identified mutations that each affect a gene encoding a broadly conserved transcriptional regulator. A mutation in the gene encoding the forkhead DNA binding domain-containing transcription factor FKH-9 enhances ER homeostasis outside the context of infection and immune activation, but paradoxically sensitizes animals to perturbations in cytosolic proteostasis. My results suggest that loss of fkh-9 enhances translocation of misfolded proteins out of the ER, thereby disrupting cytosolic proteostasis and decreasing proteasomal function. These findings implicate a critical need for balancing proteostasis across cellular compartments during organismal stress, and further investigation of the additional characterized mutants will elucidate the breadth of this phenomenon.
by Erik J. Tillman.
Ph. D.
Nugent, Ashleigh Elizabeth. "The Presence of Extracellular Matrix Alters the Chondrocyte Response to Endoplasmic Reticulum Stress." Kent State University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=kent1271375344.
Mlynarczyk, Coraline. "Regulation of p21CDKN1A in the endoplasmic reticulum stress response : mechanism, function and implications." Paris 7, 2013. http://www.theses.fr/2013PA077128.
Stress to the endoplasmic reticulum (ER) occurs during nutrient or oxygen limitation as can be found in solid tumors and is characterized by an accumulation of misfolded proteins in the ER lumen. We have previously shown that the resulting unfolded protein response (UPR) induces the p53 isoform p53/47 and a subsequent 14-3-3 sigma-mediated G2 arrest that helps to restore ER homeostasis. This contrasts with the p21coKNiA-dependent Gl arrest caused by p53 following DNA damage. A large proportion of anticancer therapies are based on genotoxic agents and we sought to determine how ER stress affects the p53-mediated response to DNA damage. It appeared that the UPR down regulates expression of p21 in a p53-dependent manner and prevents p21 induction by DNA damage, resulting in increased apoptosis. P53/47 impedes p21 promoter transactivation by p53 and the coordinated activity of both isoforms represses de novo p21 protein synthesis, via codons 76 to 164 of the p21 mRNA. It is further demonstrated that p21, if not suppressed, prevents ER stress-induced G2 arrest via directing 14-3-3 sigma degradation by the E3 ubiquitin ligase COP1. Therefore, this work i) illustrates how p53 controls an intrinsic balance between the Gl and G2 checkpoints in response to different stress signals; ii) uncovers a novel level at which p53 can regulate expression of its target genes; iii) reveals a pro-proliferative role for p21, whose suppression is essential during ER stress and iv) identifies conditions displayed by solid tumor cells that may be used to potentiate the cytotoxicity of existing anticancer drugs
Zha, Beth Shoshana. "HIV Protease Inhibitors Trigger Lipid Metabolism Dysregulation Through Endoplasmic Reticulum Stress and Autophagy." VCU Scholars Compass, 2011. http://scholarscompass.vcu.edu/etd/273.
Egawa, Naohiro. "The endoplasmic reticulum stress sensor, ATF6α, protects against neurotoxin-induced dopaminergic neuronal death." Kyoto University, 2011. http://hdl.handle.net/2433/142092.
Lipson, Kathryn L. "The Role of Endoplasmic Reticulum Stress Signaling in Pancreatic Beta Cells: a Dissertation." eScholarship@UMMS, 2008. https://escholarship.umassmed.edu/gsbs_diss/363.
Herrenbruck, Adrienne Rose. "EFFECTS OF HIGH FAT EXPOSURE ON SKELETAL MUSCLE AUTOPHAGY AND ENDOPLASMIC RETICULUM STRESS." UKnowledge, 2018. https://uknowledge.uky.edu/khp_etds/53.
Bezu, Lucillia. "Mort cellulaire immunogène : du stress du reticulum endoplasmique à l'exposition de la calréticuline." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLS246.
Conventional anticancer chemotherapies display a high degree of toxicity with certain specificity for tumor cells. However most of these approaches fail to activate immune system-related bystander effects and thus do often fail to prevent from recurrence. Despite these premises, certain anticancer treatments (including anthracycline-based chemotherapy, radiotherapy and photodynamic therapy) have the ability to induce an immunogenic cell death (ICD) modality. The exposure of calreticulin (CALR) during the course of ICD is quintessential for the transfer of tumor antigen from dying tumors to dendritic cells of the immune system as well as translocation of high mobility group box 1 (HMGB1), autophagy and ATP secretion. Previous studies have shown that certain anticancer agents including anthracylins are able to activate markers of endoplasmic reticulum stress (ER stress). Here we investigated the molecular mechanisms that link ER stress responses with hallmarks of ICD. In a drug screening approach, we showed that ICD-inducing drugs triggered the phosphorylation of the eukaryotic initiation factor 2 alpha (P-eIF2α) and that this correlated with CALR exposure (R score 0.73, p<0.01). Surprisingly though the agents failed to induce downstream ER stress pathways including the transcriptional activation of activating transcription factor 4 (ATF4), the alternative splicing of X-box binding protein 1 (XBP1s) mRNA and the proteolytic cleavage of activating transcription factor 6 (ATF6). In addition, we found that mitoxantrone actively inhibited all three arms of the unfolded protein response, when co-administered with the inhibitor of N-linked glycosylation tunicamycin, whereas tunicamycin alone triggered all arms of ER-stress. These findings were validated in vivo in immunodeficient animals xenografted with biosensors for ER-stress responses. Moreover, using a machine learning approach that integrates physicochemical properties of oncologic drugs with their ability to elicit immunogenic hallmarks including the phosphorylation of eIF2α, the exposure of CALR, the translocation of HMGB1, the formation of stress granules and the induction of autophagy we established an in silico approach for ICD prediction. For the future, we further aim to investigate the possibility to use these score comprising P-eIF2α and its downstream consequences as biomarker for immunogenic responses during anticancer treatment in patients
Lo, Ling-kit Rebecca. "ER-stress signaling and chondrocyte differentiation in mice." Click to view the E-thesis via HKUTO, 2006. http://sunzi.lib.hku.hk/hkuto/record/B3861926X.
Lo, Ling-kit Rebecca, and 羅令潔. "ER-stress signaling and chondrocyte differentiation in mice." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2006. http://hub.hku.hk/bib/B3861926X.
Clavier, Thomas. "Etude de l 'expression du stress du reticulum endoplasmique au cours de l'inflammation systémique aigue chez l'homme Gene expression of protein tyrosine phosphatase 1B and endoplasmic reticulum stress during septic shock." Thesis, Normandie, 2020. http://www.theses.fr/2020NORMR015.
Systemic inflammatory response syndrome is a common phenomenon in intensive care unit. Its origins are multiple and sometimes intricate: sepsis, trauma, major surgery, cardiopulmonary bypass (CPB), ischemia-reperfusion, acute pancreatitis, ... Its physiopathology is based on cytokine synthesis, activation of immune cells and coagulation, and alteration of endothelial function (in particular nitrogen monoxide synthesis). These abnormalities induce vascular dysfunction which may be responsible for a shock and multiple organ failure syndrome (Acute Respiratory Distress Syndrome, renal failure, confusional syndromes, ...). Recent data have shown that endoplasmic reticulum stress (ERS), is involved in endothelial dysfunction and organ failure induced by systemic inflammation. ERS corresponds to the accumulation of unfolded proteins in the endoplasmic reticulum, accumulation that can alter cell function and even induce apoptosis. The Unfolded Protein Response (UPR) is a response to ERS that allows the proteins to be folded, in particular through the synthesis of chaperone proteins and therefore allows the ERS resolution. Pre-clinical studies have shown that ERS inhibition during sepsis or sterile inflammation via chemical chaperones reduces organ failure and improves survival. However, there is no description of UPR during systemic inflammation in humans. We show in this work that all the three UPR pathways are activated during sepsis and CPB-induced inflammation. During sepsis the expression of one UPR pathway was associated with the SOFA organ failure score. In patients undergoing cardiac surgery with CPB, a relatively low UPR response and a decreased chaperone synthesis were associated with post-operative organ failure. Our data therefore confirm that UPR is activated in humans during systemic inflammation and that the intensity of its expression appears to be associated with organ failure