Дисертації з теми "KIT proto-oncogene"
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Qiu, Fei-Hua. "Proto-oncogene c-kit : structure and relationship to the transmembrane receptor kinases /." Access full-text from WCMC, 1989. http://proquest.umi.com/pqdweb?did=744572251&sid=1&Fmt=2&clientId=8424&RQT=309&VName=PQD.
Повний текст джерелаGari, Mamdooh Abdullah Mahmoud. "Pathogenesis of c-kit proto-oncogene mutations in acute and chronic myeloproliferative disorders." Thesis, University of Sheffield, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.341830.
Повний текст джерелаWang, Hong. "The proto-oncogene c-Kit inhibits tumor growth by behaving as a dependence receptor." Thesis, Lyon, 2018. http://www.theses.fr/2018LYSE1172/document.
Повний текст джерелаC-Kit has been generally considered as a receptor tyrosine kinase and a proto-oncogene, whose upregulation and mutation lead to tumor progression through its kinase activity. Clinically, drugs targeting the kinase activity of c-Kit, such as Imatinib (Gleevec), have been wildly used to treat patients with c-Kit related diseases. While the role of c-Kit as a proto-oncogene is of no doubt, some research reports and database analysis do not fit well the tumor promoting role of c-Kit, indicating a possible different role of c-Kit in cancer. Here, we show that c-Kit belongs to the dependence receptor family, similarly to other receptor tyrosine kinases such as MET, RET and TrkC. In the absent of its ligand SCF (stem cell factor), instead of staying inactive, c-Kit triggers apoptosis, which can be enhanced by silencing its kinase activity. Besides, we have shown that c-Kit is able to bind and activate caspase-9. Moreover, similarly to other dependence receptors, c-Kit is also cleaved by caspases-like protease at aspartic acid residue D816, which is crucial for its pro-apoptotic activity. The mutation of D816 site inhibits the c-Kit/caspase-9 binding and silences the pro-apoptotic activity of c-Kit. Of interest, c-Kit D816 mutation is one of the most common mutation of this receptor in many c-Kit related cancers and it promotes resistance against Gleevec treatment. We also show that overexpression of kinase mutated c-Kit is able to inhibit tumor growth in animal models, while the mutation of D816 site impairs the tumor suppressing activity. Furthermore, we develop a tool to block the SCF/c-Kit interaction, which unleashes the pro-apoptotic activity of c-Kit in cancers expressing this receptor. By using the pro-apoptotic activity of c-Kit, in combination with kinase inhibitors like Gleevec, we propose a novel therapeutic strategy. In conclusion, we demonstrate that c-Kit is a member of dependence receptor family, harboring intrinsic pro-apoptotic activity, which can be used as an alternative tool in cancer treatment
Chui, Chung-hin, and 徐宗憲. "Molecular characterization of C-KIT proto-oncogene in Hong Kong leukemia patients: 'culprit or bystander'." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1998. http://hub.hku.hk/bib/B31236790.
Повний текст джерелаChui, Chung-hin. "Molecular characterization of C-KIT proto-oncogene in Hong Kong leukemia patients : 'culprit or bystander' /." Hong Kong : University of Hong Kong, 1998. http://sunzi.lib.hku.hk/hkuto/record.jsp?B1947037X.
Повний текст джерелаEstrozi, Bruna. "Avaliação anatomoclínica e molecular do melanoma cutâneo em pacientes jovens (idade 18-30 anos)." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/5/5144/tde-01042015-144721/.
Повний текст джерелаThe incidence of cutaneous melanoma in young adults has dramatically increased in recent years. However, there is scarce data about the clinicopathological and molecular characteristics on the melanomas occurring at this age group. The present study aimed to evaluate 132 patients aged between 18 and 30 years with primary cutaneous melanoma with emphasis on the study of clinical, histopathological characteristics and molecular evaluation of mutations in BRAF, NRAS and KIT genes. Regarding the clinical and histopathological findings, the following results were found: female predominance (61.4%), trunk was the most commonly anatomical site involved (44.3%) and superficial spreading melanoma, was the most common histological type (79.5 %). The V600E mutation in BRAF (BRAFV600E) gene was analyzed in 93 cases, using RT-PCR. It was present in 38.7% (36/93) and statistically related to the vertical growth phase (p = 0.01), mild inflammatory infiltration (p = 0.02) and the presence of intradermal mitosis (p = 0.004). There was, also, strongly evidence of an association with the presence of ulceration (p = 0.05). Worse prognosis was associated with these variables. There was a predominance of BRAFV600E mutation in anatomical regions related to intermittent sun exposure. No cases of melanoma with BRAFV600E mutation showed regression phenomenon (p < 0.05). There was no significant association between BRAFV600E and gender, histological type, Clark level, Breslow thickness, solar elastosis, angiolymphatic and perineural invasion, sattelitosis, coexisting melanocytic nevus and survival. The presence of a mutation in NRAS, by RT-PCR was seen in 3.95% (3/76) of the cases. All these three mutations were of type 61K, occurred in male patients and the head and neck region. BRAFV600E and NRAS mutations, when present, were mutually exclusive. The frequency of KIT mutations, analyzed by sequencing, was 11.1% (3/27). The three mutations identified in this gene were located in exon 9 (G510, G498S and 489I). Concomitant mutations were found between KIT and NRAS and BRAFV600E. Due to the small number of KIT and NRAS mutated cases, it was not possible to establish clinical and histopathological correlations and mutation status in these genes. This study was the first to describe the G510D and G498S mutations in KIT gene in cutaneous melanomas. In the present study, BRAFV600E mutation in cutaneous melanoma of young adults correlated with anatomic and clinical features of worse prognosis compared to wild type
Hagger, Robert William. "Chronic idiopathic constipation : role of colonic motor activity interstital cells of cajal and the c-kit proto-oncogene." Thesis, St George's, University of London, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.404569.
Повний текст джерелаMendonça, Ullyanov Bezerra Toscano de. "Análise de mutações do gene KIT em pacientes com melanoma de mucosa de cabeça e pescoço e relação clínica retrospectiva." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/5/5132/tde-14122015-114016/.
Повний текст джерелаUnlike their cutaneous counterparts, head and neck mucosal malignant melanomas (HNMM) behave much more aggressively and their prognostic markers have not been fully elucidated. In recent studies, some molecular pathways have been found to be involved in the pathogenesis of melanomas. Among these, there is a proliferative MAPK pathway (\"Mitogen Activated Protein Kinase\"). This signaling pathway is involved in controlling cell growth, proliferation and migration, with a role in the development and progression of melanoma. In addition, KIT gene mutation has been identified in melanomas, indicating that there may be potential therapeutic benefits of tyrosine kinase inhibitors. Objectives: Evaluation of KIT mutation prevalence in a subset of 28 patients with HNMM treated at a single institution, establishing the relationship between different mutations and outcome (DFS and OS). The primary end-point of the study was to define the incidence of KIT mutations in HNMM, including the relationship between KIT mutations with disease-free survival (DFS) and overall survival (OS) in HNMM. Secondary end-points were correlation among therapeutic options, histopathological findings, demographic data and clinical response. Methods: This retrospective study comprised data of 28 patients with HNMM treated at Brazilian National Cancer Institute (INCA) between 2000 and 2011. Clinical analysis included patients characteristics, staging, primary and palliative treatments, disease free survival and overall survival. Progression-free survival and overall survival were analyzed using the Kaplan-Meier method, with SPS 11.0 software. KIT analysis: paraffin blocks were selected following analyses of histologic preparations, enabling DNA extraction. Different DNA concentrations were employed in PCR amplifications, based on DNA integrity. PCR amplification of exon, 9, 11, 13 and 17 was performed. . Results: Patients were predominantly females (57%). The age of presentation ranged from 27 to 85 years. The sinonasal region was the most frequent primary site (75%). All patients underwent surgical resection. Seventeen patients received adjuvant radiotherapy (37%). Recurrences occurred in 82% patients. Oncologic mutations in KIT were found in 7 (25%) of seven tumors, 3 in exon 9, 3 in exon 11 and 1 in exon 13. Predictive factors for recurrence were mitotic rate (p=0.05), vascular invasion (p=0.043), and perineural spread (p=0.034). There were no significant differences in DFS and OS according to KIT mutation. Conclusion: HNMM remains a rare disease. The present single-institution series includes 28 cases treated in single institution. Seven cases (25%) had activating KIT mutations, which is an increased prevalence of activating KIT mutations in this specific subset of mucosal melanomas. This finding suggests that there is a group of patients who might benefit with appropriate targeted therapy with kinase inhibitors
Zhang, Qiangnu [Verfasser], and Stephanie [Akademischer Betreuer] Rössler. "FUNCTIONAL ANALYSIS OF PROTO-ONCOGENE c-KIT IN THE DEVELOPMENT AND PROGRESSION OF HEPATOCELLULAR CARCINOMA / Qiangnu Zhang ; Betreuer: Stephanie Rössler." Heidelberg : Universitätsbibliothek Heidelberg, 2019. http://d-nb.info/1193347270/34.
Повний текст джерелаShahidian, Lara Zorro. "Characterization of in vitro models for the study of candidate G-quadruplex ligands targeting the human c-KIT proto-oncogene promoter." Master's thesis, Universidade de Lisboa. Faculdade de Medicina Veterinária, 2013. http://hdl.handle.net/10400.5/6216.
Повний текст джерелаProto-oncogene c-KIT has been implicated in the development and growth of several tumors, e.g. mast cell tumors (MCT) in dogs and gastrointestinal stromal tumors (GIST) in humans. Several therapeutic approaches directed to the blocking of receptor tyrosine kinases (RTK), such as c-KIT, have been created. However, after a short period of recovery, these drugs lose efficiency and the tumor relapses. A new approach, aiming to control c-KIT’s transcription, is being tested. This approach relies on the use of small molecule inhibitors (SMI) that specifically block DNA secondary structures, G-quadruplexes, located on the promoter regions of many proto-oncogenes, including c-KIT. The main goal of this work is the development of in vitro models through which the study of candidate SMIs for human c-KIT is possible. An in vitro model, composed by cytotoxicity tests aimed for the determination of the SMI’s inhibitory concentration 50 (IC50) on two human cell lines and by real time quantitative PCR (qPCR) for the study of gene expression alterations, has been developed and validated. The cytotoxicity tests were also used to identify the IC50 of three candidate ligands for c-KIT.
RESUMO - Caracterização de modelos in vitro para o estudo de possíveis ligandos de G-quadruplex dirigidos à região promotora do proto-oncogene c-KIT no Homem - O proto-oncogene c-KIT tem sido relacionado com o desenvolvimento e crescimento de vários tumores, incluindo mastocitomas em cães e tumores do estroma gastrointestinal no Homem. Várias abordagens terapêuticas têm vindo a ser desenvolvidas tendo como objetivo bloquear os recetores de tirosina quinase, tais como c-KIT. No entanto, após um curto período de recuperação, estes fármacos perdem eficácia e o tumor reaparece. Está a ser testada uma nova abordagem, que visa controlar a transcrição de c-KIT. Esta abordagem recorre ao uso de pequenas moléculas inibidoras que bloqueiam, de forma específica, estruturas secundárias de ADN, G-quadruplex, localizadas na região promotora de vários proto-oncogenes, incluindo c- KIT. O principal objetivo deste trabalho é o desenvolvimento de modelos in vitro que possam ser utilizados para estudar possíveis moléculas inibidoras para o c-KIT humano. Assim foi desenvolvido e validado um modelo in vitro, composto por testes de citotoxicidade, que visam determinar a concentração inibitória 50 dos ligandos, em duas linhas celulares humanas, e por métodos de PCR quantitativo em tempo real, para o estudo das alterações na expressão génica. Os testes de citotoxicidade foram também utilizados para identificar a concentração inibitória 50 de três possíveis ligandos para c-KIT.
Pimenta, Vanessa de Sousa Cruz. "Avaliação histoquímica e da expressão das proteínas p53 e c-KIT no mastocitoma canino." Universidade Federal de Goiás, 2012. http://repositorio.bc.ufg.br/tede/handle/tede/3576.
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES
The objective of this study was to verify the pattern of staining by Bismarck Brown and evaluate the expression of p53 and c-KIT in neoplastic mast cells, quantifying the marking obtained by these antibodies using the Image J software and correlating the values found with histologic subtypes. Mast cell tumors are the most common skin neoplasms of dogs, is an excessive proliferation of neoplastic mast cells, of variable and unpredictable biological behavior, with great capacity of recurrences and metastasis. The lesions may be dermis or subcutaneous location and three grades are described. At the first, the tumor is well differentiated, moderately differentiated is the second and the third is little differentiated. Their cause is still unknown. One of the mechanisms proposed for the proliferation of mast cells is to change the nucleotide sequence of the c-KIT gene. The tumor suppressor gene TP53 is directly related to blockage of cell cycle and the protection is changed by mutations in the p53. Were reviewed 1242 protocols of histopathology exams obtained the archives of Laboratory of Animal Pathology/UFG, from January 2007 to April 2011, found 37 diagnosis of canine cutaneous mast cell tumor. Regarding the epidemiologic aspects the prevalence of 55.26% was noted in dogs in the age group 6-10 years, 63.16% female and 39.48% of the Boxer breed. The most common anatomic site was the hind-limb with 31.58% of records. Histologic evaluation and histochemistry using Hematoxylin - Eosin and Toluidine Blue allowed to classify the majority of mast cell tumors studied, although only 24.32% of the samples were identified using the color Bismarck Brown. The prevalence of Grade II was 43.24% of all cases The lowest value expressed for p53 and c-KIT, was in Grade II, the highest value in the Grade III and the highest average in grade I. Was concluded that the coloration of Bismarck Brown proved efficient to aid in the diagnostic accuracy of laboratory routine and utilization of antibodies anti p53 and anti c-kit promoted good immunostaining with important role to determine the prognosis of canine mast cell tumors.
O objetivo deste estudo foi verificar o padrão de coloração pelo Pardo de Bismarck e avaliar a expressão de p53 e c-KIT nos mastócitos neoplásicos, quantificando a marcação obtida por estes anticorpos através do software Image J e correlacionando os valores encontrados com os subtipos histológicos. O mastocitoma é a neoplasia cutânea mais frequente do cão, sendo uma proliferação excessiva de mastócitos neoplásicos, de comportamento biológico variável e imprevisível, com grande capacidade de recidivas e metástases. As lesões podem ser de localização dérmica a subcutânea e três graus são descritos. No primeiro, o tumor é bem diferenciado, no segundo é moderadamente diferenciado e no terceiro é pouco diferenciado. Sua causa ainda é desconhecida. Um dos mecanismos propostos para a proliferação de mastócitos é a alteração da sequência de nucleotídeos do gene c-KIT. O gene supressor de tumor TP53 está diretamente relacionado ao bloqueio do ciclo celular e a proteção é alterada por mutações da p53. Foram revisados 1242 protocolos de exames histopatológicos obtidos dos arquivos do Laboratório de Patologia Animal/UFG, do período de janeiro de 2007 a abril de 2011, encontrando 37 diagnósticos de mastocitoma cutâneo canino. Quanto aos aspectos epidemiológicos a prevalência notada foi de 55,26% de cães na faixa etária de 6-10 anos, 63,16% do gênero feminino e 39,48% da raça Boxer. A localização anatômica mais frequente foi o membro pélvico com 31,58% de registros. A avaliação histológica e histoquímica utilizando a Hematoxilina - Eosina e o Azul de Toluidina permitiu classificar a maioria dos mastocitomas estudados, porém 24,32% das amostras só foram identificadas com a utilização da coloração Pardo de Bismarck. A prevalência do Grau II foi de 43,24% do total dos casos. O menor valor expresso, por p53 e c-KIT, foi no Grau II, o maior valor no Grau III e a maior média no grau I. Foi possível concluir que a coloração Pardo de Bismarck mostrou-se eficiente para auxiliar na precisão dos diagnósticos da rotina laboratorial e a utilização dos anticorpos anti p53 e anti c-KIT promoveu boa imunomarcação, com papel importante na determinação do prognóstico do mastocitoma canino.
Vilela, Maria Helena Tavares. "Ki-67, cd10, cd34, p53, cd117 e mastócitos no diagnóstico diferencial dos fibroadenomas celulares e na graduação dos tumores filóidesz." Universidade Federal de Goiás, 2013. http://repositorio.bc.ufg.br/tede/handle/tede/3229.
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The proper management of breast phyllodes tumors (PTs) remains challenging, due to the difficulty of the correct preoperative diagnosis. The aim of this study was to evaluate the usefulness of the Ki-67, CD10, CD34, p53, CD117 and the number of mast cells for the differential diagnosis between benign PTs and cellular fibroadenomas (CFs), and also at the grading of PTs. 51 primary PTs and 14 FCs were examined by immunohistochemistry (IH). Through the evaluation of the expression of CD117, greater epithelial expression was found at the FCs and an increased number of mast cells in benign TFs. The stromal expression of the Ki-67, CD10, CD34 and p53 showed relevance to the grading of PTs.
O manejo adequado dos tumores filóides (TFs) mamários continua desafiador, devido à dificuldade do diagnóstico pré-operatório correto. O objetivo deste estudo foi avaliar a utilidade do Ki-67, do CD34, do CD10, do CD117, da p53 e do número de mastócitos no diagnóstico diferencial entre os TFs benignos e fibroadenomas celulares (FCs), bem como na graduação dos TFs. Foram examinados 51 TFs primários e 14 FCs por imunohistoquímica (IH). Na marcação pelo CD117, houve maior expressão epitelial nos FCs e maior número de mastócitos nos TFs benignos. A expressão estromal do Ki-67, da p53, do CD10 e CD34 mostrou-se significante na graduação dosTFs.
Edling, Charlotte. "Receptor tyrosine kinase c-Kit signalling in hematopoietic progenitor cells." Doctoral thesis, Umeå : Umeå University, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-888.
Повний текст джерелаAll-Ericsson, Charlotta. "Uveal melanoma : cytogenetics, molecular biology and tumor immunology /." Stockholm, 2002. http://diss.kib.ki.se/2002/91-7349-278-7.
Повний текст джерелаBandeira, Rodolfo Anisio Santana de Torres. "Densidade das células intersticiais de Cajal como fator prognóstico em pacientes com estenose da junção pieloureteral." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/5/5153/tde-04082017-102827/.
Повний текст джерелаThe interstitial cells of Cajal (ICC) have been studied as peristalsis participating in various systems. Its presence in the genitourinary tract can sustain the importance of these cells in the pathophysiology of ureteropelvic junction obstruction (UPJO). The aim of this study was to evaluate the density of ICC in adults and in the late adolescence patients with UPJO, undergoing pyeloplasty and to check if there is association of changes in the ICC density with clinical findings, as well as pre and postoperative images, especially ultrasound and diuretic radioisotope renography. We selected 23 patients with UPJO, undergoing laparocopic dismembered pyeloplasty in the Urology Division of the HC-FMUSP Department of Surgery, consecutively, by the same group of surgeons in the period between February 2011 and January 2012. It was performed immunohistochemical analysis for tyrosine kinase receptor expression (c-KIT) in all samples of UPJO quantified the ICC density. The patients were followed up periodically to evaluate the clinical response and imaging. The average age of the sample was 34.83 years. There was a predominance of males (56.5%). The right kidney was the most affected (56.5%). Severe hydronephrosis was identified in most patients (52.2%). The average renal function affected estimated by diuretic radioisotope renography, pre and post-operative was respectively 33.7 and 33.4%. Of the 23 patients, 20 had an improvement on diuretic radioisotope renography pattern of ureteral drainage. There was a predominance of patients with high ICC density (52.2%). There was statistical significance when associated with ICC density and the improvement of ultrasonographic pattern (p = 0.032). However, there was no association between the ICC density and other clinical or imaging variables. It can be concluded that the density of the ICC maybe a good predictor of post-operative ultrasound response in adult patients with UPJO undergoing pyeloplasty
Fonseca, Ivone Izabel Mackowiak da. "Avaliação da expressão do gene supressor de tumor PTEN, proto-oncogene c-kit, matrilisina (MMP-7), Conexinas 32 e 43 e do complexo E-caderinas/cateninas em mastocitomas da espécie canina: estudos ex vivo e in vitro." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/10/10133/tde-24032015-170247/.
Повний текст джерелаMast cell tumors are malignant skin formations that most affect dogs, so many research projects are being directed at the discovery of new treatment options, diagnosis and prognosis of this disease. The objective of this study was to evaluate the expression of a set of proteins that are interlinked or interconnected signaling pathways, in an attempt to identify proteins that show differentially expressed in canine mast cell tumors of different grades. We performed a study of the expression of this set of 18 proteins in tumors originating from the files of the Service of Animal Pathology, Department of Pathology of the FMVZ - USP. We collected other 18 new samples of canine cutaneous mast cell tumors , which were subjected to cell culture , and 10 strains of canine cutaneous mast cell tumors were established in order to evaluate in vitro this same group of molecular markers. The samples were subjected to immunostainings the following proteins: PTEN, c-kit, E-cadherin, β-catenin, α-catenin, p120-catenin, MMP-7. In established tumor cell lines we analyzed the cell cycle, DNA ploidy, cell proliferation by CFSE, ultrastructural analysis by transmission electron microscopy , mutational analysis of c-kit gene, and analysis by immunocytochemistry and immunofluorescence of the following molecular markers: PTEN, c-kit, E-cadherin, β-catenin, α-catenin, p120-catenin, MMP-7, CX32, Cx43, vimentin, tryptase. The results demonstrate the altered expression of the proteins, c- Kit, MM7 and PTEN proteins according to the level of the canine mastocytoma E-caderina/catenina complex. It has been observed a reduced expression as well as alterations in subcellular localization of all these proteins in more aggressive tumors as in grade 3 mast cell tumors. The same was observed for Cx 43 and 32 proteins. It has been performed a survey of the medical records of 18 cases of canine mast cell tumors retrieved from the archives, and clinical parameters evaluated were age, race, gender, location, time of evolution, change lymph node metastasis, survival time, recurrence interval, death. Older animals, metastasis, and tumor location in the chest, and mast cell tumor grade: patients who had the following parameters were associated with a worse prognosis. In the established tumor cell lines, ploidy analysis revealed that all lines are diploid mastocytoma and CFSE proliferation showed that the maximum occurs within 24 hours of cultivation. The ultrastructural analysis showed that the tumor cells are mast cell lineages. Analysis by immunocytochemistry markers studied showed similar patterns to those found in immunohistochemistry. By expression of vimentin and tryptase confirmed once again the case of mast cell lines in culture. In mutational analysis of the c kit, mutations were found in exon 8 and 11, but not in exon 17. Our results show the simultaneous occurrence of numerous molecular alterations in canine mast cell tumors. Proteins have different functions and evaluated pathways, but that interlock may regulate or be regulated, depending on the moment of the cell. The destabilization of the complex E-cadherin-catenins seems to be the effector program in the progression of canine mast cell tumors. The main purpose of performing morphological, functional and molecular studies of tumors is to contribute, sooner or later, to the control of these diseases. Hopefully, with this work, we have provided important information which will facilitate the search for better treatment of canine mast cell tumors
Lennartsson, Johan. "Stem Cell Factor Induced Signal Transduction." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis : Univ.-bibl. [distributör], 2002. http://publications.uu.se/theses/91-554-5291-4/.
Повний текст джерелаAbadi, Marcia Datz. ""Análise imunohistoquímica do osteossarcoma em pacientes com e sem metástases e sua correlação prognóstica"." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/5/5140/tde-17022006-132205/.
Повний текст джерелаWe study, by imunohistochemistry technique, the proteins p53, MDM-2, c-Kit, ErbB-2, PCNA and p-glycoprotein in samples of osteosarcoma tumors at diagnosis and its correlation with the prognosis of this patients. The p-53 was positive in 23,1% (9/39), PCNA in 71,4% (25/35), p-glycoprotein in 40,5% (15/37), MDM-2 in 34,8% (8/23), c-kit in 67,8%(25/37) and ErbB-2 in 17,9% (7/39) of the samples. In the univariate analysis, the presence of metastasis at diagnosis, the positivity of p-53 and ErbB-2 influenced the prognosis individually, otherwise, in the multivariate analysis, the presence of metastasis at diagnosis was the only prgnostic factor statistically significant
Tisserand, Julie. "Mise en évidence d'un rôle suppresseur de tumeur pour la protéine tyrosine-kinase FES dans le mélanome." Thesis, Aix-Marseille, 2016. http://www.theses.fr/2016AIXM5035.
Повний текст джерелаAmong skin cancers, melanoma is the most aggressive and has the worst prognosis. In the last years, new therapeutic tools have been developed but responses differ between patients and are often transient due to resistance mechanisms. This highlights the need to improve understanding of molecular mechanisms of the disease. During my thesis, I have shown for the first time that FES tyrosine kinase is expressed in normal melanocytes, and that its expression is lost at the protein and RNA levels in most melanoma cell lines. The same result is observed in a panel of 12 patients’ short-term cultures. The lack of expression is due to FES promoter hyper-methylation and can be reverted using a hypomethylating agent. By restoring FES expression in two melanoma cell lines, I observe a decrease of oncogenic properties of the cells. Moreover, the analysis of the TCGA data on melanoma indicate that FES expression is strongly decreased or lost in about 40% of patients, and that this loss of expression is correlated with FES promoter methylation. Importantly, patients with low level of FES mRNA have poor prognosis compared to FES expressing patients. Finally, Fes knock-out mice crossed with an inducible melanoma mouse model indicate that tumors proliferation and size are more important under a Fes KO background.In conclusion, by using melanoma cells in vitro, data from melanoma patients and mouse models, I have demonstrated that FES is expressed in normal melanocytes and clearly plays a tumor suppressor role.in melanoma
Tamlin, Vanessa Sarah. "KIT Mutations in Australian Canine Mast Cell Tumours and Correlations with Patient Prognostic Factors." Thesis, 2019. http://hdl.handle.net/2440/123488.
Повний текст джерелаThesis (Ph.D.) -- University of Adelaide, School of Animal and Veterinary Sciences, 2019
Randall, Valerie A., Tracey J. Jenner, Nigel A. Hibberts, Oliveira Isabel O. De, and Tayyebeh Vafaee. "Stem cell factor/c-Kit signalling in normal and androgenetic alopecia hair follicles." 2008. http://hdl.handle.net/10454/6148.
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