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Amaral, Telmo. "Analysis of breast tissue microarray spots". Thesis, University of Dundee, 2010. https://discovery.dundee.ac.uk/en/studentTheses/0a83915d-2f11-4b89-9c24-8dc3c15346f2.
Pełny tekst źródłaNguyễn, Hoài Nam. "Méthodes et algorithmes de segmentation et déconvolution d'images pour l'analyse quantitative de Tissue Microarrays". Thesis, Rennes 1, 2017. http://www.theses.fr/2017REN1S104/document.
Pełny tekst źródłaThis thesis aims at developing dedicated methods for quantitative analysis of Tissue Microarray (TMA) images acquired by fluorescence scanners. We addressed there issues in biomedical image processing, including segmentation of objects of interest (i.e. tissue samples), correction of acquisition artifacts during scanning process and improvement of acquired image resolution while taking into account imaging modality and scanner design. The developed algorithms allow to envisage a novel automated platform for TMA analysis, which is highly required in cancer research nowadays. On a TMA slide, multiple tissue samples which are collected from different donors are assembled according to a grid structure to facilitate their identification. In order to establish the link between each sample and its corresponding clinical data, we are not only interested in the localization of these samples but also in the computation of their array (row and column) coordinates according to the design grid because the latter is often very deformed during the manufacturing of TMA slides. However, instead of directly computing array coordinates as existing approach, we proposed to reformulate this problem as the approximation of the deformation of the theoretical TMA grid using “thin plate splines” given the result of tissue sample localization. We combined a wavelet-based detection and a ellipse-based segmentation to eliminate false alarms and thus improving the localization result of tissue samples. According to the scanner design, images are acquired pixel by pixel along each line, with a change of scan direction between two subsequent lines. Such scanning system often suffers from pixel mis-positioning (jitter) due to imperfect synchronization of mechanical and electronic components. To correct these scanning artifacts, we proposed a variational method based on the estimation of pixel displacements on subsequent lines. This method, inspired from optical flow methods, consists in estimating a dense displacement field by minimizing an energy function composed of a nonconvex data fidelity term and a convex regularization term. We used half-quadratic splitting technique to decouple the original problem into two small sub-problems: one is convex and can be solved by standard optimization algorithm, the other is non-convex but can be solved by a complete search. To improve the resolution of acquired fluorescence images, we introduced a method of image deconvolution by considering a family of convex regularizers. The considered regularizers are generalized from the concept of Sparse Variation which combines the L1 norm and Total Variation (TV) to favors the co-localization of high-intensity pixels and high-magnitude gradient. The experiments showed that the proposed regularization approach produces competitive deconvolution results on fluorescence images, compared to those obtained with other approaches such as TV or the Schatten norm of Hessian matrix
Sievertzon, Maria. "Transcript profiling of small tissue samples using microarray technology". Doctoral thesis, Stockholm Department of Biotechnology, Royal Institute of Technology, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-158.
Pełny tekst źródłaCheng, Yabin. "Tissue microarray based biomarker study in human cutaneous melanoma". Thesis, University of British Columbia, 2014. http://hdl.handle.net/2429/46655.
Pełny tekst źródłaXie, Dan, i 謝丹. "Application of high-throughput tissue microarray technology in cancer research". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2004. http://hub.hku.hk/bib/B30283619.
Pełny tekst źródłaMckenzie, Gavin Medical Sciences Faculty of Medicine UNSW. "The analysis of signalling pathways in sporadic colorectal carcinoma using tissue microarrays". Publisher:University of New South Wales. Medical Sciences, 2008. http://handle.unsw.edu.au/1959.4/43370.
Pełny tekst źródłaJernås, Margareta. "Microarray analysis of gene expression in human adipocytes and adipose tissue /". Göteborg : Institute of Medicine, Dept. of Molecular and Clinical Medicine, Sahlgrenska Academy, Göteborg University, 2008. http://hdl.handle.net/2077/9583.
Pełny tekst źródłaPANSINI, P. F. "Potencial Prognóstico da Survivina em Carcinoma Epidermóide da Cavidade Bucal". Universidade Federal do Espírito Santo, 2017. http://repositorio.ufes.br/handle/10/7104.
Pełny tekst źródłaO carcinoma epidermóide de cabeça e pescoço (CECP) é o sexto tipo de câncer mais comum em todo o mundo. Nos últimos anos, tem sido sugerida a participação da survivina na progressão tumoral em CECP. Este estudo teve como objetivo avaliar a survivina como potencial biomarcador de progressão tumoral em CECB. Foram utilizados no estudo dados clínicos e amostras biológicas de 115 indivíduos com carcinoma epidermóide da cavidade bucal. Lâminas contendo tecidos tumorais coradas pelo método hematoxilina e eosina foram usadas para as análises histopatológicas para avaliar o infiltrado linfocitário tumoral, padrão de invasão tumoral, gradação tumoral, invasão vascular, linfática e perineural. Tissue Microarrays foram construídos para realizar a análise imunohistoquímica da expressão da proteína survivina utilizando o anticorpo primário monoclonal de coelho anti-survivina. Para avaliar as associações entre as variáveis estudadas foram utilizados os testes Qui-Quadrado e o Exato de Fisher. A comparação das médias dos segmentos foi obtida pelo teste T de amostras independentes. As curvas de sobrevida foram calculadas pelo modelo de Kaplan-Meier e confirmadas pelo modelo multivariado de Cox. Nossos resultados mostraram existir correlação entre o infiltrado linfocitário tumoral alto, tamanho do tumor primário T1/T2 (p = 0,001) e estadiamento clínico I e II (p = 0,005). O padrão de invasão tumoral tipo IV foi correlacionado com o tamanho do tumor primário T3/T4 (p = 0,006) e estadiamento clínico avançado (estádio III e IV) (p = 0,028). Invasão perineural foi associada com o tamanho do tumor primário T1/T2 (p = 0,035). A expressão nuclear da survivina na porção mediana do tumor mostrou associação com a metástase em linfonodos regionais (p = 0,004) e o estadiamento clínico (p = 0,041). A análise regressiva multivariada confirmou que as variáveis tamanho do tumor primário (p = 0,004) e acometimento linfonodal (p= 0,06) são fatores prognósticos independentes para sobrevida global, enquanto o etilismo influencia na sobrevida livre de doença (p = 0,048). Com este estudo pode-se concluir que a elevada expressão da survivina está correlacionada com o comportamento tumoral mais agressivo, estadiamento clínico avançado, presença de mestástase linfonodal, podendo ser considerada como indicador de prognóstico em pacientes com CECB. A variável histopatológica padrão de invasão tumoral mostrou que sua correlação com tamanho do tumor primário e estadiamento clínico avançado podendo estar relacionada ao pior prognóstico dos pacientes em CECB.
Foster, Cheryl June. "Identifying a prognostic test in follicular lymphoma using a tissue microarray and immunohistochemistry". Thesis, Kingston, Ont. : [s.n.], 2008. http://hdl.handle.net/1974/1296.
Pełny tekst źródłaHabibi, Golareh. "Y-box binding protein-1 (YB-1) is a bio-marker of aggressiveness in breast cancer and is a potential target for therapeutic intervention". Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/911.
Pełny tekst źródłaCarlberg, Konstantin. "In Situ RNA Quality Control : A spatial heat map of RNA integrity with single cell resolution". Thesis, KTH, Skolan för bioteknologi (BIO), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-176873.
Pełny tekst źródłaNeves-Silva, Rodrigo 1986. "Estudo para validação do uso do tissue microarray como método para análise imunoistoquímica de ameloblastomas = A validation study for the use of tissue microarray as a method for immunohistochemical analysis of ameloblastomas". [s.n.], 2015. http://repositorio.unicamp.br/jspui/handle/REPOSIP/289468.
Pełny tekst źródłaTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: Tumores odontogênicos (TOs) são neoplasias originadas do órgão de desenvolvimento dentário ou de seus remanescentes. Neste contexto, o ameloblastoma é um dos TOs mais relevantes devido a sua elevada frequência e alto potencial de agressividade clínica. O presente estudo se propôs a realizar uma análise clinicopatológica retrospectiva de ameloblastomas e, posteriormente, validar o uso da técnica do tissue microarray (TMA) para a análise imunoistoquímica de ameloblastomas. Material e métodos: O estudo clinicopatológico se baseou numa amostra de 869 TOs, oriundos de dois centros de Patologia Oral brasileiros, sendo 177 (20,36%) casos de ameloblastomas, dos quais foram selecionados 40 (22,59%) casos representativos de ameloblastomas multicísticos que foram distribuídos em dois blocos do TMA montados em triplicata contendo cilindros de 1.0mm e 2.0mm (Sakura Co., Tokyo, Japan). A validação da análise imunoistoquímica foi realizada para proteínas expressas em citoplasma (citoqueratina 14, citoqueratina 19 e Bcl-2) e em núcleo (Ki-67); analisada por meio semiquantitativo e também por microscopia óptica digital (Aperio Scanscope CS® Slide Scanner; Aperio Technologies Inc.; Vista, CA; USA) e quantificada por meio dos algoritmos PixelCount® e NuclearV9® (Aperio Technologies Inc.; Vista, CA; USA). Resultados: Os 40 casos de ameloblastoma multicístico afetaram predominantemente pacientes do gênero masculino (62,5%), a média de idade no momento do diagnóstico foi de 39,92 anos (variando de 15 a 71 anos), a maioria (92,5%) dos casos ocorreu na região posterior da mandíbula. A concordância obtida para a expressão imunoistoquímica entre os diferentes diâmetros do TMA e os cortes convencionais mostrou melhores resultados para os cilindros de 2.0mm montados em triplicata nas análises digital e semiquantitativa. Em conclusão, o presente estudo demonstrou originalmente que a técnica do TMA pode ser usada com rigor científico para estudos baseados na análise imunoistoquímica de marcadores de citoplasma e núcleo celular em ameloblastomas multicísticos
Abstract: Odontogenic tumors (OTs) are neoplasms originating from the tooth developing apparatus or its remnants. In this context, ameloblastoma is one of the most relevant OTs due to its high frequency and clinical potential of aggressiveness. The present study performed a retrospective, clinicopathological analysis of ameloblastomas and subsequently validated the use of the tissue microarray (TMA) for immunohistochemical analysis of ameloblastomas. Materials and methods: The clinicopathologic study was based on a sample of 869 OTs from two Brazilian Oral Pathology Centers. Of these, 177 (20.36%) cases were ameloblastomas, of which 40 (22.59%) cases of multicystic ameloblastomas were selected and divided into two TMA blocks mounted in triplicate containing cores of 1.0mm and 2.0mm (Sakura Co., Tokyo, Japan). The validation of the immunohistochemical analysis was performed for proteins expressed in the cytoplasm (cytokeratin 14, cytokeratin 19, and Bcl-2) and nuclei (Ki-67), analyzed in a semiquantitative way as well as by digital optical microscopy (Aperio Scanscope CS® Slide Scanner; Aperio Technologies Inc., Vista, CA, USA), and quantified by PixelCount® and NuclearV9® algorithms (Aperio Technologies Inc., Vista, CA, USA). Results: Forty cases of ameloblastoma affected predominantly male patients (n=25; 62.5%). The mean age at diagnosis was 39.92 years (ranging from 15 to 71 years), and the majority (92.5%) of the cases occurred in the posterior mandible. The concordance obtained for the immunohistochemical expression in different TMA core diameters and whole sections showed best results for 2.0mm TMA assembled in triplicates both for semiquantitative and digital analyses. In conclusion, this study originally demonstrated that the TMA technique could be used with scientific rigor in studies based on immunohistochemical analysis of cytoplasmic and nuclear markers in multicystic ameloblastomas
Doutorado
Estomatologia
Doutor em Estomatopatologia
Das, Gupta Paromita Clinical School Prince of Wales Hospital Faculty of Medicine UNSW. "Gene profiling in soft tissue sarcoma: predictive value of EGFR in sarcoma tumour progression and survival". Publisher:University of New South Wales. Clinical School - Prince of Wales Hospital, 2007. http://handle.unsw.edu.au/1959.4/43259.
Pełny tekst źródłaStrömberg, Sara. "Antibody-based Profiling of Expression Patterns using Cell and Tissue Microarrays". Doctoral thesis, Uppsala University, Department of Genetics and Pathology, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-8680.
Pełny tekst źródłaIn this thesis, methods to study gene and protein expression in cells and tissues were developed and utilized in combination with protein-specific antibodies, with the overall objective to attain greater understanding of protein function.
To analyze protein expression in in vitro cultured cell lines, a cell microarray (CMA) was developed, facilitating antibody-based protein profiling of cell lines using immunohistochemistry (IHC). Staining patterns in cell lines were analyzed using image analysis, developed to automatically identify cells and immunohistochemical staining, providing qualitative and quantitative measurements of protein expression. Quantitative IHC data from CMAs stained with nearly 3000 antibodies was used to evaluate the adequacy of using cell lines as models for cancer tissue. We found that cell lines are homogenous with respect to protein expression profiles, and generally more alike each other, than corresponding cancer cells in vivo. However, we found variability between cell lines in regards to the level of retained tumor phenotypic traits, and identified cell lines with a preserved link to corresponding cancer, suggesting that some cell lines are appropriate model systems for specific tumor types.
Specific gene expression patterns were analyzed in vitiligo vulgaris and malignant melanoma. Transcriptional profiling of vitiligo melanocytes revealed dysregulation of genes involved in melanin biosynthesis and melanosome function, thus highlighting some mechanisms possibly involved in the pathogenesis of vitiligo. Two new potential markers for infiltrating malignant melanoma, Syntaxin-7 and Discs large homolog 5, were identified using antibody-based protein profiling of melanoma in a tissue microarray format. Both proteins were expressed with high specificity in melanocytic lesions, and loss of Syntaxin-7 expression was associated with more high-grade malignant melanomas.
In conclusion, the combination of antibody-based proteomics and microarray technology provided valuable information of expression patterns in cells and tissues, which can be used to better understand associations between protein signatures and disease.
Qiao, Guibin. "Molecular prognostic study of non-small cell lung cancer using high-throughput tissue microarray and immunohistochemistry". [S.l.] : [s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=975693859.
Pełny tekst źródłaZerati, Marcelo. "Estudo de fatores prognósticos moleculares no carcinoma renal de células claras pela técnica de tissue microarray". Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/5/5153/tde-23082011-143257/.
Pełny tekst źródłaINTODUCTION: Renal cell carcinoma is an aggressive disease and its incidence is rising. The clear cell variant is the most common, and also the most aggressive. Recent advances in the understanding of the tumors molecular biology indicate that the oncogenesis of each histologic subtype is controlled by distinct cellular mechanisms. Current prognostic models are gradually incorporating the advances in molecular biology, in the hope to improve their predictive capacity. OBJECTIVES: To correlate the immunoexpression of selected markers with 1) overall survival, and 2) with established prognostic parameters (clinical TNM stage, tumor size, Fuhrman nuclear grade, microvascular invasion and perirenal fat invasion) in patients with non-metastatic ccRCC. METHODS: This is a retrospective cohort study, we evaluated 99 patients with non-metastatic clear cell renal cell carcinoma, as to the expression of the following proteins: CA-IX, EGF-R, Ki-67, p53, PTEN, VEGF e VEGF-R. The analyzed parameters where: overall survival, TNM stage, tumor size, Fuhrman nuclear grade, microvascular invasion, perirenal fat invasion. We utilized a custom built tissue microarray, and the immunoexpression was digitally quantified using the Photoshop® software. RESULTS: The mean follow-up time was 7,9 years. We found no correlation between the expression of the studied molecular markers and overall survival. As for the conventional prognostic parameters, we found the expression of EGF-R to correlate with T stage (p= 0,049) and perirenal fat invasion (p= 0,020), and VEGF-R to correlate with Fuhrman nuclear grade (p= 0,022) and microvascular invasion (p= 0,022). None of the other markers showed correlation with the studied parameters. CONCLUSIONS: The expression of EGF-R and VEGF-R may be useful tools in the prognostic evaluation of unfavorable risk in patients with non metastatic clear cell renal cell carcinoma
Barros, Érika Aparecida Felix de. "Aneuploidia dos Cromossomos 3, 7, 9 e 17 no câncer de próstata localizado tratado com cirurgia: Análise e correlação prognóstica". Universidade Nove de Julho, 2014. http://bibliotecadigital.uninove.br/handle/tede/1151.
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Prostate cancer (PCa) is the most common non-skin solid tumor in man in western countries. The prognosis is defined by the measurement of PSA, stage and Gleason score, however, none of these factors classics, even when combined, show good performance in prognosis definition, therefore molecular markers are being studied. Cytogenetic abnormalities, represented by chromosomal deletions and gains, are characteristic of oncogenesis and potentially can be used as a prognostic marker. Objectives: The study aimed to identify the cytogenetic alterations of aneuploidy in chromosomes 3 , 7 , 17 and 9p21 locus by FISH technique located in PCa underwent radical prostatectomy. As a secondary objective correlate the changes found with biochemical recurrence after surgical treatment and the classical prognostic factors of prostate adenocarcinoma. Methodology: For this case-control study 112 patients with clinically localized PCa who underwent radical prostatectomy were followed up postoperatively than ten years were analyzed. Samples of the primary tumor of each patient were available for tissue microarray matrix and cytogenetic changes were assessed by FISH technique. Results: Among the patients for the 9p21 locus, 6.4 % had lost one of the two alleles. In relation to the results obtained for chromosomes 3, 7 and 17 find deletion of one allele of 2.3, 1.2 and 1.8% of the cases respectively. No association between aneuploidy of these chromosomes with the Gleason score, pathological stage, serum PSA level or risk group . We observed that the loss of the 9p21 locus was associated with shorter time to recurrence (p 0.038 ). Conclusions: We found a low occurrence of aneuploidy detected by probes CEP 3 , 7 and 17 and LSI 9p in our series of tumors. We observed that the loss of the 9p21 locus was associated with worse prognosis in CaP located treated with surgery.
Introdução: O câncer de próstata (CaP) é o tumor sólido não cutâneo mais comum do homem em países ocidentais. O prognóstico é feito pela dosagem do PSA, estádio e escore de Gleason, porém, nenhum destes fatores clássicos, mesmo quando avaliados em conjunto, apresentam bom desempenho na determinação prognóstica, por isso marcadores moleculares estão sendo estudados. Alterações citogenéticas, representadas por ganhos e deleções cromossômicas, são características da oncogênese e potencialmente podem ser empregadas como marcador de prognóstico. Objetivos: O estudo teve como objetivo principal identificar as alterações citogenéticas de aneuploidia nos cromossomos 3, 7, 17 e lócus 9p21 pela técnica de FISH no CaP localizado submetido à prostatectomia radical. Como objetivo secundário correlacionamos as alterações encontradas com a recidiva bioquímica após tratamento cirúrgico e com os fatores prognósticos clássicos do adenocarcinoma de próstata. Metodologia: Para este estudo caso controle foram analisados 112 pacientes com diagnóstico de CaP clinicamente localizado submetidos à prostatectomia radical com seguimento pós operatório superior a dez anos. As amostras do tumor primário de cada paciente foram disponibilizadas em matriz de microarranjo tecidual e as alterações citogenéticas foram avaliadas através da técnica de FISH. Resultados: Dos pacientes avaliados para o lócus 9p21, 6,4% apresentaram perdas de um dos dois alelos. Em relação aos resultados obtidos para os cromossomos 3, 7 e 17 encontramos deleção de um dos alelos em 2,3; 1,2 e 1,8% dos casos respectivamente. Não observamos associação entre aneuploidia desses cromossomos com o escore de Gleason, estádio patológico, nível sérico de PSA ou grupo de risco. Observamos que a perda do lócus 9p21 esteve associado a menor tempo para recidiva (p 0,038). Conclusões: Encontramos baixa ocorrência de aneuploidia detectadas pelas sondas CEP 3, 7 e 17 e LSI 9p em nossa série de tumor. Observamos que a perda do lócus 9p21 esteve associado a pior prognóstico no CaP localizado tratado com cirurgia.
Fujimoto, Masakazu. "Stromal plasma cells expressing immunoglobulin G4 subclass in non-small cell lung cancer". Kyoto University, 2015. http://hdl.handle.net/2433/199170.
Pełny tekst źródłaHinterberger, Marc Lorenz. "D2-40 and calretinin : a tissue microarray analysis of 341 malignant mesotheliomas with emphasis on sarcomatoid differentiation /". [S.l.] : [s.n.], 2009. http://opac.nebis.ch/cgi-bin/showAbstract.pl?sys=000281124.
Pełny tekst źródłaGuo, Dongli. "Expression of Wnt signaling targets and their clinico-pathological significance in colorectal neoplasm a tissue microarray study /". Click to view the E-thesis via HKUTO, 2006. http://sunzi.lib.hku.hk/hkuto/record/B38610541.
Pełny tekst źródłaTawfik, El-Mansi M. M. "Molecular analysis and application of tissue microarray technology to the histopathological and immunohistochemical analysis of cervical adenocarcinoma". Thesis, University of Edinburgh, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.662741.
Pełny tekst źródłaSchreiber, Melanie [Verfasser], i Guido [Akademischer Betreuer] Sauter. "Tissue microarray based identification of molecular cancer therapy targets in clinical routine / Melanie Schreiber. Betreuer: Guido Sauter". Hamburg : Staats- und Universitätsbibliothek Hamburg, 2013. http://d-nb.info/1045024171/34.
Pełny tekst źródłaMayer, Lisa [Verfasser]. "Immunhistochemische Evaluation der Proteinexpression verschiedener Somatostatin-Rezeptoren beim muskelinfiltrierenden Harnblasenkarzinom mittels der Tissue Microarray Technik / Lisa Mayer". Tübingen : Universitätsbibliothek Tübingen, 2021. http://d-nb.info/1232725730/34.
Pełny tekst źródłaWang, Yemin. "Role of tumour suppressor ING3 in melanoma pathogenesis". Thesis, University of British Columbia, 2009. http://hdl.handle.net/2429/3850.
Pełny tekst źródłaSahadevan, Kanagasabai. "The development of tissue microarray to investigate the role of fibroblast growth factor signalling regulators in prostate cancer". Thesis, University of Newcastle upon Tyne, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.440559.
Pełny tekst źródłaWeitbrecht, Timo Konstantin [Verfasser]. "Expression von Cytokeratin 18 in menschlichen Tumoren und Normalgeweben: Eine Tissue-Microarray-Studie an 11.952 Tumoren / Timo Konstantin Weitbrecht". Hamburg : Staats- und Universitätsbibliothek Hamburg Carl von Ossietzky, 2020. http://d-nb.info/1229625615/34.
Pełny tekst źródłaSchneider, Jana Verfasser], i Guido [Akademischer Betreuer] [Sauter. "Thyreoglobulin Expression in humanen Tumor- und Normalgeweben : Eine Tissue Microarray-Studie an 3448 Tumoren / Jana Schneider ; Betreuer: Guido Sauter". Hamburg : Staats- und Universitätsbibliothek Hamburg, 2020. http://nbn-resolving.de/urn:nbn:de:gbv:18-106511.
Pełny tekst źródłaSchneider, Jana [Verfasser], i Guido [Akademischer Betreuer] Sauter. "Thyreoglobulin Expression in humanen Tumor- und Normalgeweben : Eine Tissue Microarray-Studie an 3448 Tumoren / Jana Schneider ; Betreuer: Guido Sauter". Hamburg : Staats- und Universitätsbibliothek Hamburg, 2020. http://d-nb.info/1216629714/34.
Pełny tekst źródłaJunttila, S. (Sanna). "Studies of kidney induction in vitro using gene expression profiling and novel tissue manipulation technique". Doctoral thesis, Oulun yliopisto, 2014. http://urn.fi/urn:isbn:9789526206608.
Pełny tekst źródłaTiivistelmä Nisäkkäiden munuainen on toiminut vuosikymmeniä mallielimenä tutkittaessa kehitysbiologisia tapahtumasarjoja, kuten epitelisaatiota, haaroittumismorfologiaa sekä solujen erilaistumista. Munuaisaihioita voidaan viljellä laboratorio-olosuhteissa, jolloin kehityksen aikaisia muutoksia päästään seuraamaan lähes reaaliaikaisesti. Perinteisten kudosviljelytekniikoiden tarjoamat mahdollisuudet solujen molekulaariseen muokkaukseen ovat kuitenkin varsin rajalliset. Tässä väitöskirjassa esitettävät tulokset pyrkivät osaltaan vähentämään näitä rajoitteita. Väitöskirjan kokeellisessa osassa tarkastellaan lähemmin klassista munuaiskudosviljelyä sekä esitetään siihen tehtyjä optimointeja, joiden avulla kudosviljelyä pyritään hyödyntämään geenien toiminnan tutkimuksessa. Aluksi perinteisellä tavalla reikäisen kalvon läpi indusoitu nefroni karakterisoitiin tarkasti hyödyntäen useita erilaistumista osoittavia merkkimolekyylejä. Lisäksi samalla tekniikalla tuotettujen munuaiskudosviljelmien geeniekspressiota tutkittiin mikrosiruanalyysillä. Klassisia kudosviljelytekniikoita muokattiin soveltuvammaksi moderneille geneettisille työkaluille. Munuaiskudos hajotettiin ensin solususpensioksi, jonka jälkeen solut muodostivat uudelleen kolmiulotteisen, kudosmaisen rakenteen. Hyödyntämällä suojaavia kasvutekijöitä, hajotus kyettiin tekemään jo ennen nefronien muodostumisen alkua. Näin saavutettin 24 tunnin aikaikkuna indusoimattoman kudoksen geneettiselle muokkaukselle. Väitöskirjassa esitelläänkin demonsrtaatiot solujen lisäämisestä ja poistamisesta sekä virusvälitteisestä geenin aktivoinnista ja hiljennyksestä hyödyntäen uutta kudosmanipulaatio ja –vilejelytekniikkaa. Nefronin kehityksen aikaisen geeniekspression kartoitus sekä tässä tutkimuksessa kehitetyt uudet kudosmanipulaatio ja -viljelytekniikat tarjoavat yhdessä työkaluja molekyylitason yksityiskohtaiseen tutkimiseen
Matilda, Rentoft. "The use of formalin fixed paraffin embedded tissue and global gene expression profiling for increased understanding of squamous cell carcinoma of the tongue". Doctoral thesis, Umeå universitet, Patologi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-54005.
Pełny tekst źródłaAgnarsdóttir, Margrét. "Biomarker Discovery in Cutaneous Malignant Melanoma : A Study Based on Tissue Microarrays and Immunohistochemistry". Doctoral thesis, Uppsala universitet, Institutionen för immunologi, genetik och patologi, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-146436.
Pełny tekst źródłaMattedi, Romulo Loss. "Carcinomas uroteliais de bexiga: aspectos anatomopatológicos e imuno-histoquímicos. Pesquisa de metaloproteinases de matriz utilizando a técnica de tissue microarray (TMA)". Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/5/5144/tde-30082011-160347/.
Pełny tekst źródłaOBJECTIVES: To study morphological features related to tumor progression in urothelial carcinoma of the urinary bladder and its association with immunohistochemical (IHC) expression of matrix metalloproteinases (MMPs) -2, -9 and -14 in epithelial and stromal cells of primary tumor and regional lymph node metastases. METHODS: Sixty-one cases of muscle-invasive or locally advanced urothelial carcinomas of the bladder operated on Clinic\'s Hospital of Faculty Medicine Sao Paulo University and the Cancer Institute of the State of Sao Paulo, with 34 cases showing regional lymph nodes metastases, were characterized regarding gender, age, tumor size, multifocality, histological grade, neoplastic type/configuration, papillary type, architectural pattern of invasive tumor, nuclear atypia, sarcomatoid component, squamous and glandular diffentiation, histological variants, lymphovascular and perineural invasion, carcinoma in situ, tumor stage, metastases to regional lymph nodes, metastases size and extranodal extension. Tissue samples of 1.0 mm were arranged in tissue microarrays blocks (TMA) for IHC detection of MMP-2, MMP-9 and MMP-14. The grading of expression of MMPs was determined to a semiquantitative scale from 0 (absence) to 20 (higher expression). The associations between the IHC global expression of MMPs, in epithelium and in stromal cells of the primary tumor and in the lymph node metastases with the morphological features were obtained through Pearson\'s chi-square (significant at p<0.05). RESULTS: Thirty-six, 57 and 60 cases of primary tumor were positive for MMP-2, MMP-9 and MMP-14 respectively. In the lymph nodes metastases, 20, 27 and 26 cases were positive for MMP-2, MMP-9 and MMP-14 respectively. The global IHC expression of MMP-2 in primary tumor has been associated with the architectural pattern of invasion (p=0.022). The expression in stromal cells were correlated with the degree of nuclear atypia (p=0.032) and the percentage of sarcomatoid component (p=0.003). The IHC expression of MMP-9 in primary tumor has been associated with squamous differentiation (p=0.033). The architectural pattern of invasion was related to the expression of MMP-9 in epithelium (p=0.043) and in the stroma (p=0.044). Expression of MMP-9 in the stroma was associated with the degree of nuclear atypia (p=0.031), sarcomatoid component (p=0.036) and the percentage of this component in primary tumor (p=0.013). The grouped tumoral stage pT2+pT3 vs pT4 showed association with MMP-9 expressed in epithelium (p=0.049). For MMP-14, the architectural pattern of invasion showed significant association with global IHC expression (p=0.022) and tumor epithelium (p=0.045). The percentage of sarcomatoid component related to the estromal expression of MMP-14 (p<0.001). Considering the IHC expression of MMPs in lymph nodes metastases, there was a significant association between MMP-9 with the type of histological variants (p=0.021) and the expression of MMP-14 with the percentage of sarcomatoid component in primary tumor (p=0.017). CONCLUSION: The study of IHC expression of MMP-2, MMP-9 and MMP-14 in bladder carcinoma samples arranged in TMA, both in epithelium and in stromal cells and regional lymph nodes metastases, demonstrated significant association with morphological features recognized as prognostically important for these tumors. These findings herald the importance of action of these enzymes in epithelialmesenchymal transition, providing basis for the understanding of tumoral progression and metastases in urothelial carcinoma
Vidale, Mariana Marras [UNESP]. "Avaliação da prliferação e apoptose com a utilização de arranjos em matriz de amostra tecidual (Tissue Microarray - TMA) em mastocitomas cutâneos caninos". Universidade Estadual Paulista (UNESP), 2010. http://hdl.handle.net/11449/89270.
Pełny tekst źródłaCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Os mastócitos são células provenientes do precursor CD34 da medula óssea, o mastocitoma (MCT) pertence ao grupo das neoplasias de células redondas e possui etiologia desconhecida, é a neoplasia cutânea mais comum em cães, sem predileção por raça, sexo ou idade. Seu comportamento biológico é bastante agressivo e de alta frequência. A graduação histopatológia proposta Patnaik et al., (1984), é o critério mais utilizado para a graduação histopatológica da neoplasia sendo o grau 1 uma neoplasia bem diferenciada, o grau 2 moderadamente diferenciada e o grau 3 pouco diferenciada ou anaplásica. O presente trabalho teve como objetivos a avaliação do ínidice proliferativo e apoptotico dos MCT em lâmina de Microarranjo de tecido (TMA) utilizando a técnica de imunoistoquiímica e TUNEL. Para tal utilizou-se 166 casos de MCT compondo um arranjo em matriz de amostra tecidual, ou tissue microarray (TMA) com 190 amostras, sendo avaliado o padrão de marcação da proteína Kit, a proliferação celular com o anticorpo primário Ki67 e apoptose com o anticorpo primário caspase-3 clivada e pela técnica da Terminal Deoxynucleotidyl Transferase Mediated dUTP Nick end Labeling Assey (TUNEL). Quando os casos foram avaliados quanto à imunoexpressão de c-KIT, os tumores (únicos e múltiplos) com expressão citoplasmática da proteína KIT tiveram uma taxa proliferativa maior e uma menor taxa apoptótica quando comparados aos com expressão membranosa. Os MCTs grau 3 tiveram um maior índice proliferativo (imunoexpressão de Ki67) quando comparados aos tumores de graus 1 e 2. Não foi observada correlação entre a imunomarcação do anticorpo primário caspase-3 clivada e a técnica de TUNEL, sendo que a técnica de TUNEL se mostrou mais eficaz na avaliação da apoptose que a imunomarcação para caspase-3 clivada
Mast cells are from precursor CD34 cells bone marrow, the mast cell tumor (MCT) belongs to the group of round cell malignancies and has unknown etiology, is the most common skin cancer in dogs without distinction of race, sex or age. Its biological behavior is very aggressive and high frequency. The histopathological grading proposal from Patnaik et al., (1984), is the most commonly used criterion for the histopathological grade of the tumor is a tumor grade 1 are well-differentiated, grade 2 are moderately differentiated and grade 3 are poorly differentiated or anaplastic. This study aimed to evaluate the proliferative and apoptotic index of MCT in blade tissue microarray (TMA) using the TUNEL technique and immunohistochemistry. To this end we used 166 cases of MCT composing an tissue microarray (TMA) with 190 samples, and evaluated the pattern of protein labeling kit, cell proliferation, with the primary antibody Ki67 and apoptosis with primary antibody and cleaved caspase-3 by the technique of terminal deoxynucleotidyl transferase dUTP Nick End Labeling Mediated Assey (TUNEL). When the cases were evaluated for immunoexpression of c-KIT, tumors (single and multiple) with cytoplasmic KIT protein expression had a higher proliferative rate and a lower apoptotic rate when compared to those with membranous expression. Grade 3 MCTs had a greater proliferative index (Ki67 immunostaining) when compared with tumor grades 1 and 2. No correlation was observed between the immunostaining of primary antibody caspase-3 cleavage and TUNEL technique, and TUNEL technique was more effective in assessing apoptosis that immunostaining for cleaved caspase-3
Fonseca, Felipe Paiva 1986. "Análise clinicopatológica de 493 casos de tumores de glândulas salivares e construção de blocos de parafinas utilizando a técnica de tissue microarray". [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/288414.
Pełny tekst źródłaDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
Made available in DSpace on 2018-08-20T06:52:13Z (GMT). No. of bitstreams: 1 Fonseca_FelipePaiva_M.pdf: 2031852 bytes, checksum: 891d082818e43f0fa54efa8553fba38c (MD5) Previous issue date: 2012
Resumo: Tumores de glândulas salivares correspondem à cerca de 3 a 6% de todos os tumores de cabeça e pescoço, apresentando uma ampla variação quanto à freqüência dos diferentes tipos histológicos e seus respectivos cursos clínicos. Desta forma, a determinação de novos marcadores moleculares que estejam relacionados com o comportamento biológico destas neoplasias se faz necessário e o uso da técnica de tissue microarray (TMA) ou micro-arranjo tecidual representa uma ferramenta altamente eficaz para a identificação destes marcadores. Sendo assim, o objetivo do presente estudo é avaliar as características clinicopatológicas de 493 neoplasias de glândulas salivares e descrever os princípios técnicos de construção de blocos de micro-arranjo tecidual, assim como suas vantagens e desvantagens para o estudo destes tumores. Para isto, os prontuários de um centro de patologia médica e de um centro de patologia oral compreendidos entre os anos de 2001 e 2011 foram revisados e os dados clinico patológicos coletados, enquanto que a construção dos blocos de TMA foi realizada por meio de equipamento manual de arranjo tecidual em matriz, onde três áreas tumorais representativas foram selecionadas e incluídas no bloco receptor. Após a obtenção dos resultados, foi observado que o adenoma pleomórfico e o carcinoma mucoepidermóide representaram as neoplasias benigna e maligna de glândulas salivares mais freqüentes e após a construção de 12 blocos de TMA foi possível obter boa representatividade utilizando-se cilindros de 1,0, 2,0 ou 3,0 mm, especialmente em neoplasias sólidas. Portanto, a distribuição dos tumores de glândulas salivares na amostra estudada está de acordo com os achados relatados anteriormente na literatura e a técnica de TMA apresenta-se como uma metodologia de alto rendimento e baixo custo no estudo de tumores de glândulas salivares
Abstract: Salivary gland tumors account for 3 to 6% of the head and neck tumors, with a broad variation in the incidence of their different histological subtypes and their respective clinical courses. For this reason, the determination of new molecular markers truly associated to the biological behavior of these neoplasias becomes necessary and the use of tissue microarray (TMA) technique represents a high-throughput laboratory tool for identifying such markers. The aim of the present study is to evaluate the clinic-pathological features of 493 salivary gland neoplasias and to describe the technical principles for construction of TMA blocks, as well as their advantages and disadvantages regarding the study of salivary gland tumors. For this, medical charts of a general pathology service and of an oral pathology service from 2001 to 2011 were reviewed and the clinic-pathological data acquired, whereas TMA blocks were constructed using a manual tissue arrayer by selecting three representative neoplastic areas to be included in the recipient block. Following the acquisition of the results, it was observed that pleomorphic adenoma and mucoepidermoid carcinoma represented the most frequent benign and malignant neoplasias, respectively, and that after the building of 12 TMA blocks it was possible to obtain high representative cores by using 1.0, 2.0 and 3.0 mm cylinders, especially in solid neoplasias. Hence, the distribution of salivary gland tumors in the sample studied is in agreement with the findings reported previously in the literature and the TMA technique presents as a high-throughput and low-cost methodology in salivary gland tumors study
Mestrado
Patologia
Mestre em Estomatopatologia
Vidale, Mariana Marras. "Avaliação da prliferação e apoptose com a utilização de arranjos em matriz de amostra tecidual (Tissue Microarray - TMA) em mastocitomas cutâneos caninos /". Botucatu : [s.n.], 2010. http://hdl.handle.net/11449/89270.
Pełny tekst źródłaBanca: Noeme Sousa Rocha
Banca: Antonio Carlos Alessi
Resumo: Os mastócitos são células provenientes do precursor CD34 da medula óssea, o mastocitoma (MCT) pertence ao grupo das neoplasias de células redondas e possui etiologia desconhecida, é a neoplasia cutânea mais comum em cães, sem predileção por raça, sexo ou idade. Seu comportamento biológico é bastante agressivo e de alta frequência. A graduação histopatológia proposta Patnaik et al., (1984), é o critério mais utilizado para a graduação histopatológica da neoplasia sendo o grau 1 uma neoplasia bem diferenciada, o grau 2 moderadamente diferenciada e o grau 3 pouco diferenciada ou anaplásica. O presente trabalho teve como objetivos a avaliação do ínidice proliferativo e apoptotico dos MCT em lâmina de Microarranjo de tecido (TMA) utilizando a técnica de imunoistoquiímica e TUNEL. Para tal utilizou-se 166 casos de MCT compondo um arranjo em matriz de amostra tecidual, ou tissue microarray (TMA) com 190 amostras, sendo avaliado o padrão de marcação da proteína Kit, a proliferação celular com o anticorpo primário Ki67 e apoptose com o anticorpo primário caspase-3 clivada e pela técnica da Terminal Deoxynucleotidyl Transferase Mediated dUTP Nick end Labeling Assey (TUNEL). Quando os casos foram avaliados quanto à imunoexpressão de c-KIT, os tumores (únicos e múltiplos) com expressão citoplasmática da proteína KIT tiveram uma taxa proliferativa maior e uma menor taxa apoptótica quando comparados aos com expressão membranosa. Os MCTs grau 3 tiveram um maior índice proliferativo (imunoexpressão de Ki67) quando comparados aos tumores de graus 1 e 2. Não foi observada correlação entre a imunomarcação do anticorpo primário caspase-3 clivada e a técnica de TUNEL, sendo que a técnica de TUNEL se mostrou mais eficaz na avaliação da apoptose que a imunomarcação para caspase-3 clivada
Abstract: Mast cells are from precursor CD34 cells bone marrow, the mast cell tumor (MCT) belongs to the group of round cell malignancies and has unknown etiology, is the most common skin cancer in dogs without distinction of race, sex or age. Its biological behavior is very aggressive and high frequency. The histopathological grading proposal from Patnaik et al., (1984), is the most commonly used criterion for the histopathological grade of the tumor is a tumor grade 1 are well-differentiated, grade 2 are moderately differentiated and grade 3 are poorly differentiated or anaplastic. This study aimed to evaluate the proliferative and apoptotic index of MCT in blade tissue microarray (TMA) using the TUNEL technique and immunohistochemistry. To this end we used 166 cases of MCT composing an tissue microarray (TMA) with 190 samples, and evaluated the pattern of protein labeling kit, cell proliferation, with the primary antibody Ki67 and apoptosis with primary antibody and cleaved caspase-3 by the technique of terminal deoxynucleotidyl transferase dUTP Nick End Labeling Mediated Assey (TUNEL). When the cases were evaluated for immunoexpression of c-KIT, tumors (single and multiple) with cytoplasmic KIT protein expression had a higher proliferative rate and a lower apoptotic rate when compared to those with membranous expression. Grade 3 MCTs had a greater proliferative index (Ki67 immunostaining) when compared with tumor grades 1 and 2. No correlation was observed between the immunostaining of primary antibody caspase-3 cleavage and TUNEL technique, and TUNEL technique was more effective in assessing apoptosis that immunostaining for cleaved caspase-3
Mestre
Gry, Marcus. "Global expression analysis of human cells and tissues using antibodies". Doctoral thesis, Stockholm : Bioteknologi, Kungliga Tekniska högskolan, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-9116.
Pełny tekst źródłaTimoszczuk, Luciana Maria Sevo. "Análise de proteínas cuja expressão é controlada por miRNA e relacionada à progressão do adenocarcinoma de próstata por imuno-histoquimica em tissue microarray". Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/5/5153/tde-13122012-162235/.
Pełny tekst źródłaIntroduction: Prostate cancer (PCa) is the most common tumor in men and the second leading cause of cancer death in men in Brazil. MicroRNA (miRNA) is a class of small non-coding RNA that plays a key role in the control of gene expression. They are responsible for the control of key processes in the cell and are involved in tumorigenesis in humans. Previously, we demonstrated alterations in the expression profile of miRNA 100, 218 and let7c comparing localized and metastatic carcinomas. The characterization of expression profiles of their target proteins in PCa is crucial to understanding the processes involved in carcinogenesis, giving us the opportunity to discover new diagnostic or prognostic markers, and most importantly to find new targets for the development of innovative therapies. Objective: To analyze the expression of proteins controlled by miR-let7c (Ras, c- Myc and Bub1), miR-100 (Smarca5 and Retinoblastoma) and miR- 218 (Laminin 5 3) and proliferative activity (Ki-67) in prostate cancer with immunohistochemistry using tissue microarrays representing localized PCa, lymph node and bone metastases. To correlate the expression levels of miRNAs with their target proteins. To analyze the expression of miRNAs, proteins and proliferative activity with prognostic factors of prostate cancer and disease progression. Methods: The immunoexpression of Smarca5, Retinoblastoma, Laminin, Ras, c-Myc, Bub1 and Ki-67 was evaluated by IHC by tissue microarray technique featuring three stages of PCa, with 112 cases of localized PCa, 19 lymph node metastases and 28 bone metastases. The images obtained from IHC were submitted to analysis using the digital image software MacBiophotonics ImageJ from the National Institutes of Health, USA, where the intensity of luminescence was quantified densitometrically. We studied the expression profile of the miRNAs in the paraffin blocks of 61 patients out of the 112 patients with localized carcinoma, who underwent protein analysis by IHC. The processing of miRNA involved three steps: extraction of miRNA, generation of complementary DNA and amplification of the miRNA by quantitative real time PCR (qRT-PCR). To analyze the data we used a control endogenous RNU-43. The results were analyzed using the 2-CT formula. As control, we used the tissue from five patients with benign prostate hyperplasia (BPH) submitted to surgery. The relationship between the expression of miRNAs and their target proteins were analyzed as well as their expression with Gleason score, pathological stage and disease progression considered as PSA>0.4 ng/mL in a mean follow-up of 77.5 months. The statistical analysis was performed using SPSS 19.0 software, we used the Student t test, Mann-Whitney test, Kruskal- Wallis and chi-square. The value was considered statistically significant when p0.05. Results: There was a decrease in the expression of Ras (p=0.017) and Laminin (p<0.0001) according to PCa progression from localized to lymph node and bone metastases. There was an increase in the expression of Retinoblastoma (p=0.0361) and an increase in proliferative activity assessed by Ki-67 (p<0.0001). We also found a relationship between the positivity of c-Myc expression with pT3 staged tumors (p=0.070). All miRNAs showed overexpression in PCa samples. Laminin showed a higher expression together with higher expression of miR-218 (p=0.038). The other miRNAs did not show a relationship with protein expression by IHC. There was no correlation between the expression of miRNAs and protein expression by IHC with biochemical recurrence. Conclusions: Although our findings confirm the overexpression of miR-100, 218 and let7c in localized PCa, there was no correlation between their expression and the protein of their target using immunohistochemistry. We demonstrated that there was a change in immunostatining of Ras, Laminin 5 3, Retinoblastoma and Ki- 67 according to tumor progression. The increased expression of c- Myc per IHC showed a significant tendency to relate to tumor unconfined staged pT3
Barrezueta, Luis Fernando Mesias [UNIFESP]. "Imuno-expressão das proteínas da família BCL-2 (BCL-2. BCL-XL, BAX, BAK, BAD) em câncer gátrico, preparados em arranjo em matriz (TMA)". Universidade Federal de São Paulo (UNIFESP), 2009. http://repositorio.unifesp.br/handle/11600/9724.
Pełny tekst źródłaCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Em casos de carcinoma gástrico, para contribuir ao conhecimento do processo de carcinogênese: Objetivo: Estudar a expressão das proteínas da família Bcl-2 (BcI-2, Bcl-xl, Bak, Bad, Bax). Correlacionar a expressão destas proteínas com 0 índice apoptótico mediante a expressão da proteína Caspase 3 clivada, com 0 índice mit6tico mediante a expressão da proteína Ki-67 e com a expressão da proteína p53. Método: Técnica de arranjo em matriz de amostras teciduais (TMA): em 87 amostras de adenocarcinomas gástricos (grupo teste) e de mucosa gástrica não tumoral (grupo controle) foi avaliada a imuno-expressão das proteínas da família BcI-2 (BeI-2, Bcl-xl, Bak, Bad, Bax), da proteína p53, da proteína caspase 3 e da proteína Ki-67. Resultados: Todas as proteínas examinadas foram observadas nos adenocarcinomas e mucosa não tumoral, porem com diferenças de expressão em relação à porcentagem de positividade e intensidade. Observamos: i) Houve associação entre 0 tamanho do tumor e a proteína p53. ii) Houve associação da proteína Bad no adenocarcinoma com a idade dos pacientes. iii) Associação das proteínas Bax, Bad e Ki-67 com 0 adenocarcinoma de tipo intestinal. iv) As proteínas Bcl-xl, Bak, Bad, p53 e Ki-67 apresentaram diferenças estatisticamente significantes entre a imuno-expressão no tumor e na mucosa não tumoral. v) Associação das proteínas Bax, Bak e Bad na mucosa não tumoral. vi) Não houve correlação da imunoexpressão das proteínas com a sobrevida dos pacientes. Conclusão: A expressão aumentada da proteína Bcl-xl nos adenocarcinomas, com evidente diferença de expressão entre 0 grupo teste e 0 grupo controle, esta relacionada com 0 efeito anti-apoptótico da proteína. A expressão reduzida das proteínas Bak e Bad e a expressão aumentada das proteínas p53 e Ki-67 nos adenocarcinomas demonstram 0 desequilíbrio entre morte e proliferação celular, permitindo 0 crescimento descontrolado das células neoplásicas.
Purpose: To study the immunoexpression of Bcl-2 family proteins (Bcl-2, Bcl-xl, Bax, Bak, Bad) and to evaluate the correlation between the immunoexpression of these proteins with the cleaved caspases 3, Ki-67 and p53 immuno-expression. Methods: A TMA paraffin block was constructed with gastric carcinoma tissue (test group) and normal gastric adjoining mucosa (control group) of 87 patients. The TMA block was submitted to immunohistochemistry for Bcl-2, Bcl-xl, Bax, Bak, Bad, p53 and-cleaved Caspase 3. Results: All studied proteins were present in tumor and normal gastric adjoining mucosa, but with different intensity and amount of positive cells. i) There was an association between tumor size and p53 expression. ii) association between Bad expression in the tumor and patient’s age. iii) Intestinal type adenocarcinoma was positively correlated with the expression of Bax, Bad and Ki-67. iv) The protein Bcl-xl, Bak, Bad, p53 and Ki-67 showed statistically significant differences between the immuno-expression in tumor and normal gastric adjoining mucosa. v) There was an association between the proteins Bax, Bak and Bad expression in the normal gastric adjoining mucosa. vi) No correlation between patient’s survival rates and the expression of the proteins was observed. Conclusions: The higher expression of Bcl-xl protein in adenocarcinoma, the difference of Bcl-xl expression between test group and control group, might be related with the anti-apoptotic effect of this protein. The lower expression of Bak and Bad and the increased expression of p53 protein and Ki-67 protein in adenocarcinomas demonstrate the imbalance between death and cellular proliferation, which allows the uncontrolled tumor cell proliferation.
FAPESP: 04/09932-4
FAPESP: 06/54187-0
TEDE
Hemdan, Tammer. "Prognostic and Predictive Factors in Bladder Cancer". Doctoral thesis, Uppsala universitet, Urologkirurgi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-282607.
Pełny tekst źródłaGong, Ting. "Computational Dissection of Composite Molecular Signatures and Transcriptional Modules". Diss., Virginia Tech, 2009. http://hdl.handle.net/10919/77302.
Pełny tekst źródłaPh. D.
Rasiah, Krishan Kumar St Vincent's UNSW. "The identification of novel biomarkers in the development and progression of early prostate cancer". Awarded by:University of New South Wales. St Vincent's, 2006. http://handle.unsw.edu.au/1959.4/24187.
Pełny tekst źródłaGeiges, Annabella [Verfasser], i Arnulf [Akademischer Betreuer] Stenzl. "Evaluation von Alterationen innerhalb der mTOR-Regulation entlang der Progression zum metastasierten Prostatakarzinom – Immunhistochemische Untersuchungen mittels Tissue-Microarray-Technik / Annabella Christina Geiges ; Betreuer: Arnulf Stenzl". Tübingen : Universitätsbibliothek Tübingen, 2019. http://d-nb.info/1196633770/34.
Pełny tekst źródłaLarsson, Karin. "Generation and characterization of antibodies for proteomics research". Doctoral thesis, Stockholm : Skolan för bioteknologi, Kungliga Tekniska högskolan, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-11425.
Pełny tekst źródłaGriffith, Obi Lee. "Identification of gene expression changes in human cancer using bioinformatic approaches". Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/689.
Pełny tekst źródłaBaneshi, Mohammad Reza. "Statistical models in prognostic modelling with many skewed variables and missing data : a case study in breast cancer". Thesis, University of Edinburgh, 2009. http://hdl.handle.net/1842/4191.
Pełny tekst źródłaLandman, Maria Luísa de Lima. "Expressão de marcadores imunoistoquímicos em neoplasias melanocíticas de equinos por microarranjo de tecidos". Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/10/10133/tde-13032012-161024/.
Pełny tekst źródłaThe aim of this study was to evaluate the morphological behavior, and expression of the following proteins: S-100, Melan-A, HMB-45, Ki-67, PCNA and p53, in 25 equine melanocytic neoplasms. Clinical (gender, breed, coat color, age and lesions location) and morphological (cellular, pigment, nuclear, nucleoli, melanophages, invasion and necrosis) data were collected. A tissue microarray block, embedded in paraffin, with equine tissue samples and positive controls, was elaborated for protein expression through immunohistochemistry. The evaluation of S100, HMB-45 and Melan-A was based on a score, and for Ki-67, PCNA and p53 it was based on cellular count. Breeds were: Mixed breed (16/25, 64%), Lusitano (6/25, 24%), Arab (2/25, 8%) and Swedich (1/25, 4%). All animals were gray and the majority males (18/25, 72%). Age varied from 4 to 24 years old (mean=13 years). The perianal region (13/25, 52%) was the most common location. Morphological analysis have shown neoplasms with predominantly moderate (52%) and intense (40%) cellularity, diffuse and fascicles distribution (52%), no mitoses figures (96%) and predominance of epithelioid and spindle cells in the same tumor (80%). There was discrete (48%) and moderate (44%) nuclear atypia, round and elongated nucleus in the same tumor (76%), and disperse chromatin (60%). Nucleoli were multiple and prominent in the majority of cases (88%). Tumor cells with diffuse and intense pigmentation, with dermal location (100%) were predominant. High cellularity of macrophages (64%) with diffuse distribution (96%) was mostly seen. The protein expression for melanocytes have shown 44% of moderate to strong expression for S100 protein, 56% of weak expression for HMB-45 protein and 64% of negative expression for Melan-A protein. It was found positivity for more than two antibodies in 72% of equine melanocytic neoplasms. The proliferation antibodies Ki-67 and PCNA had mean positivity of 0,0005% and 15,7%, respectively. The p53 expression had mean positivity of 6,1%. Macrophages cellularity was statistically associated with S100 and p53. In conclusion: 1. clinical data obtain reproduce the biological behavior of equine Macrophages celllularity was statistically associated with S100 and p53. In conclusion: 1. clinical data obtain reproduce the biological behavior of equine melanocytic neoplasms, excepting the animals age; 2. equine melanocytic neoplasms assemble to human cellular blue nevi and dogs melanocytoma; 3. the tissue microarray was shown to be an economic, rapid and less variable technique; 4. using a panel for antibodies for melanocytes is relevant to differentiate melanocytic and not melanocytic tumors, reproducing the diagnosis panel used in human and canine literature; 5. the proliferation index found suggests that both antibodies (Ki-67 and PCNA) could be used in mitotic activity cell count; and 6. p53 protein has more relation with cellular cycle stop than in other equine studies, probably indicating a different biological behavior than the presented in humans and dogs.
Lindholm, Andreas. "Ezrin som prognosmarkör för rektalcancer". Thesis, Malmö högskola, Fakulteten för hälsa och samhälle (HS), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-26644.
Pełny tekst źródłaYearly, about 2000 persons in Sweden are diagnosed with rectal cancer. Although advances have been made in tumour detection and its treatment, local recurrence still represents a severe matter. A majority of the patients diagnosed with local recurrence will not survive. There are no clinically available prognostic tissue markers for rectal cancer patients concerning the risk of local recurrence at the moment. The identification of a prognostic marker could lead to the development of an individualized treatment plan for the patient, both primarily and postoperatively as well as in follow-up. Several published papers have shown that the protein ezrin could be a potential tumour marker in various tumours. Association between high ezrin expression and poor prognosis has been demonstrated. The aim of this study was to further explore if ezrin may function as a prognostic marker for rectal. This by manufacturing tissue blocks utilizing the technique of tissue microarray that were stained immunohistochemically for ezrin. By analysing the expression of ezrin in the tumour cell cytoplasms microscopically by determining the colour intensity. Patients in the study form a control group consisting of only patients that did not develop a local recurrence. The ezrin expression of the control group will be compared to the results from the study of Jörgren et al. (2010) on rectal cancer patients who developed local recurrence within 5 years of surgery, where it was shown that ezrin expression could be used as a prognostic marker for rectal cancer. In 19,4% (59/304) the expression intensity of the tumour cells cytoplasm was assessed as weak, as moderate in 56,9% (173/304) and as intense in 23,7% (72/304). The intensity of the ezrin expression will be analysed multivariately, and the prognostic value further evaluated.
Brentel, Sahra. "Protokollutveckling för caldesmon samt en jämförelse med SMMS-1 av dess effektivitet som en myoepitelial markör på fibroadenom". Thesis, Malmö högskola, Fakulteten för hälsa och samhälle (HS), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-26142.
Pełny tekst źródłaImmunohistochemistry (IHC), is a method used for examining the presence of specific biomarkers in tissue. It uses antibodies affinity for antigens and their presence can then be visualized. Caldesmon is a protein that is associated with the cytoskeleton in smooth muscle and non-smooth muscle cells. It is used within IHC as a marker for smooth muscle but also as a marker for the myoepithelium. The intent of this study was to develop a new protocol for caldesmon and to compare it with SMMS-1, also a marker for smooth muscle and the myoepithelium. The comparison was performed on tissue from fibroadenoma, a type of breast cancer that evolved from epithelial tissue and stroma, due to its high content of myoepithelial cells. For optimal effectiveness, the tissue microarray technique was used, where tissue from several blocks are extracted and brought together into a single new block. A Ventana Benchmark Ultra was used to develop a new protocol for the new antibody, caldesmon. The new protocol was used in the comparison with SMMS-1 on fibroadenoma tissue. The results were that SMMS-1 had a clearer and sharper staining of the myoepithelial layer, due to the fact that it only stained the layer. While caldesmon also stained the stroma in the tissue. Because fibroadenom tissue contained so much stroma the staining done with caldesmon made it harder to separate the myoepithelial layer from its surroundings.
Boeuf, Stéphane. "Comparative study of gene expression during the differentiation of white and brown preadipocytes". Phd thesis, Universität Potsdam, 2002. http://opus.kobv.de/ubp/volltexte/2005/51/.
Pełny tekst źródłaSäugetiere haben zwei verschiedene Arten von Fettgewebe: das weiße Fettgewebe, welches vorwiegend zur Lipidspeicherung dient, und das braune Fettgewebe, welches sich durch seine Fähigkeit zur zitterfreien Thermogenese auszeichnet. Weiße und braune Adipozyten sind beide mesodermalen Ursprungs. Die Mechanismen, die zur Entwicklung von Vorläuferzellen in den weißen oder braunen Fettzellphenotyp führen, sind jedoch unbekannt. Durch verschiedene experimentelle Ansätze konnte gezeigt werden, daß diese Adipocyten vermutlich durch die Differenzierung zweier Typen unterschiedlicher Vorläuferzellen entstehen: weiße und braune Preadipozyten. Von dieser Hypothese ausgehend, war das Ziel dieser Studie, die Genexpression weißer und brauner Preadipozyten auf Unterschiede systematisch zu analysieren.
Methoden
Die zu vergleichenden Zellen wurden aus primären Zellkulturen weißer und brauner Preadipozyten des dsungarischen Zwerghamsters gewonnen. „Representational Difference Analysis“ wurde angewandt, um potentiell unterschiedlich exprimierte Gene zu isolieren. Die daraus resultierenden cDNA Fragmente von Kandidatengenen wurden mit Hilfe der Microarraytechnik untersucht. Die Expression dieser Gene wurde in braunen und weißen Fettzellen in verschiedenen Differenzierungsstadien und in braunem und weißem Fettgewebe verglichen.
Ergebnisse
12 Gene, die in braunen und weißen Preadipozyten unterschiedlich exprimiert werden, konnten identifiziert werden. Drei Komplement Faktoren und eine Fettsäuren Desaturase werden in weißen Preadipozyten höher exprimiert; drei Struktur Gene (Fibronectin, Metargidin und a Actinin 4), drei Gene verbunden mit transkriptioneller Regulation (Necdin, Vigilin und das „small nuclear ribonucleoprotein polypeptide A“) sowie zwei Gene unbekannter Funktion werden in braunen Preadipozyten höher exprimiert. Mittels Clusteranalyse (oder Gruppenanalyse) wurden die gesamten Genexpressionsdaten charakterisiert. Dabei konnten die Gene in 4 typischen Expressionsmuster aufgeteilt werden: in weißen Preadipozyten höher exprimierte Gene, in braunen Preadipozyten höher exprimierte Gene, während der Differenzierung herunter regulierte Gene und während der Differenzierung hoch regulierte Gene.
Schlußfolgerungen
In dieser Studie konnte gezeigt werden, daß weiße und braune Preadipozyten aufgrund der Expression verschiedener Gene unterschieden werden können. Es wurden mehrere Kandidatengene zur Bestimmung weißer und brauner Preadipozyten identifiziert. Außerdem geht aus den Genexpressionsdaten hervor, daß funktionell unterschiedliche Gruppen von Genen eine wichtige Rolle bei der Differenzierung von weißen und braunen Preadipozyten spielen könnten, wie z.B. Gene des Komplementsystems und der extrazellulären Matrix.
Introduction
Mammals have two types of adipose tissue: the lipid storing white adipose tissue and the brown adipose tissue characterised by its capacity for non-shivering thermogenesis. White and brown adipocytes have the same origin in mesodermal stem cells. Yet nothing is known so far about the commitment of precursor cells to the white and brown adipose lineage. Several experimental approaches indicate that they originate from the differentiation of two distinct types of precursor cells, white and brown preadipocytes. Based on this hypothesis, the aim of this study was to analyse the gene expression of white and brown preadipocytes in a systematic approach.
Experimental approach
The white and brown preadipocytes to compare were obtained from primary cell cultures of preadipocytes from the Djungarian dwarf hamster. Representational difference analysis was used to isolate genes potentially differentially expressed between the two cell types. The thus obtained cDNA libraries were spotted on microarrays for a large scale gene expression analysis in cultured preadipocytes and adipocytes and in tissue samples.
Results
4 genes with higher expression in white preadipocytes (3 members of the complement system and a fatty acid desaturase) and 8 with higher expression in brown preadipocytes were identified. From the latter 3 coded for structural proteins (fibronectin, metargidin and a actinin 4), 3 for proteins involved in transcriptional regulation (necdin, vigilin and the small nuclear ribonucleoprotein polypeptide A) and 2 are of unknown function. Cluster analysis was applied to the gene expression data in order to characterise them and led to the identification of four major typical expression profiles: genes up-regulated during differentiation, genes down-regulated during differentiation, genes higher expressed in white preadipocytes and genes higher expressed in brown preadipocytes.
Conclusion
This study shows that white and brown preadipocytes can be distinguished by different expression levels of several genes. These results draw attention to interesting candidate genes for the determination of white and brown preadipocytes (necdin, vigilin and others) and furthermore indicate that potential importance of several functional groups in the differentiation of white and brown preadipocytes, mainly the complement system and extracellular matrix.
Lundberg, Emma. "Bioimaging for analysis of protein expression in cells and tissues using affinity reagents". Doctoral thesis, Stockholm : School of biotechnology, Royal institute of technology, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4862.
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