Abstract library

36 results for "promoter methylation".
#62 Genome-wide DNA methylation profiling of pancreatic neuroendocrine tumors identifies distinct methylation profiles and differentially methylated gene promoter regions associated with low, medium and high grade tumors
Introduction: Integration of genetics and epigenetics has emerged as a powerful approach to studying cellular differentiation (Mikkelsen et al, 2009) and tumorigenesis (Shen et al, 2007). The study of DNA methylation is of particular importance in cancer, as causal involvement has been demonstrated and it is the most stable of all epigenetic modifications, making it a desirable marker for both early detection and treatment of tumors. Hypermethylation of CpG sites in gene promoter regions leads to decreased gene expression; if such a gene is a tumor suppressor, this leads to carcinogenesis. To date, there have been no studies of genome-wide DNA methylation profiling of NETs. This study sets out to determine the DNA methylation profiles of low, intermediate and high grade pancreatic NET liver metastases with the intention of identifying dysregulated biological pathways in the development of these tumors. A protocol for the analysis formalin-fixed paraffin embedded tissue (FFPE) has also been developed in order to study these tumors in significant numbers following this pilot study.
Conference: 7th Annual ENETS Conference (2010)
Category: Basic
Presenting Author: Dr Christina Thirlwell
#936 Promoter Hypermethylation at RASSF1 is a Feature of Small Intestinal Neuroendocrine Tumors
Introduction: Promoter hypermethylation of RASSF1 has been reported in many tumor types.
Conference: 11th Annual ENETS Conference (2014)
Category: Basic Science - Genetics, epigenetics, miRNAs
Presenting Author: Dr Anna Karpathakis
#471 Alterations of Global and Gene-Specific DNA Methylation in Midgut Carcinoids
Introduction: Epigenetic alterations of DNA methylation are known to be associated with the clinical presentation of midgut carcinoids.
Conference: 9th Annual ENETS Conference (2012)
Category: Basic
Presenting Author: Omid Fotouhi
#72 Reduced expression of p27 and the occurrence of CpG island methylator phenotype in insulinomas
Introduction: The molecular pathogenesis of sporadic insulinoma is unclear, though some of the genes were found to be slienced by promoter methylation. CpG island methylator phenotype (CIMP) was found in a number of common tumors and correlated with loss of expression of p27, which may contribute to the tumorigenesis of the tumors.
Conference: 7th Annual ENETS Conference (2010)
Category: Basic
Presenting Author: Dr Yuan-Jia Chen
Authors: Chen Y J, Zhou Q, Xiao Y, Zhu Y, ...
#676 Gene Silencing by Promoter Hypermethylation in SI-NETs
Introduction: Aberrant DNA methylation is an important feature of human cancer affecting corresponding gene expressions and clinical features in different tumors, including SI-NETs.
Conference: 10th Annual ENETS Conference (2013)
Category: Basic Science - Genetics, epigenetics, miRNAs
Presenting Author: Omid Fotouhi
Keywords: SI-NET
#1440 Expression and Clinical Significance of Alpha-internexin in Gastroenteropancreatic Neuroendocrine Neoplasm
Introduction: Alpha-internexin is a 66-kDa neuronal intermediate filament protein, data on its role in gastroenteropancreatic neuroendocrine neoplasm (GEP-NEN) are limited.
Conference: 13th Annual ENETS conference (2016)
Category: Biomarkers
Presenting Author: Chen Jie
Authors: Yuhong W, Yuanjia C, Minhu C, Jie C, ...
#780 Epigenetic Regulation of Endogenous Somatostatin Expression in Neuroendocrine Tumors
Introduction: Somatostatin (SST) can regulate hormone secretion and cell proliferation in neuroendocrine tumors (NETs). SST expression levels in NETs likely differ between patients. DNA methylation inhibits gene transcription and can be reversed by the demethylating drug 5-aza-2-deoxycytidine (AZA).
Conference: 10th Annual ENETS Conference (2013)
Category: Biomarkers
Presenting Author: MSc Marije J. Veenstra
#842 O6-Methylguanine DNA Methyltransferase (MGMT) Expression and Ki-67 Index Predict Response to Temozolomide in Patients with Well-Differentiated Pancreatic Neuroendocrine Tumors (WDPNET)
Introduction: Temozolomide (TEM) showed encouraging results in WDPNET. Decreased MGMT expression and methylation of its promoter seems to correlate with better outcome in TEM-treated glioblastomas.
Conference: 11th Annual ENETS Conference (2014)
Category: Biomarkers
Presenting Author: Dr Jerome Cros
Authors: Cros J, Hentic O, Rebours V, Zappa M, ...
#212 Reduced MEN1 Gene Expression in Pulmonary Carcinoids Is Associated With Metastatic Disease
Introduction: Lung carcinoids are neuroendocrine tumors that can be classified as typical (TC) or atypical (AC) carcinoids. Previously, MEN-1 mutations and associated LOH of 11q13 have been implied in tumorigenesis.
Conference: 8th Annual ENETS Conference (2011)
Category: Basic
Presenting Author: MSc Dorian R.A. Swarts
#748 O6-Methylguanine-DNA Methyltransferase Deficiency in Neuroendocrine Tumors and Correlation with Response to Alkylating Agents (Temozolomide, Streptozotocin, Dacarbazine)
Introduction: Low O6-methylguanine-DNA methyltransferase (MGMT) expression is predictive of response to alkylants in some tumor types.
Conference: 10th Annual ENETS Conference (2013)
Category: PRRT-Ablative therapies-Endoscopic treatment
Presenting Author: MD thomas Walter
Keywords: MGMT