Epigenetic Manipulation of the Somatostatin Receptor Type 2 in Neuroendocrine Tumor Cells Abstract #1097

Introduction: The somatostatin receptor type 2 (sst2) is a target for treatment in patients with neuroendocrine tumors (NET). However, variability in tumoral sst2 expression might lead to variability in response. Epidrugs could increase sst2 levels and improve response to somatostatin analogues (SSA).
Aim(s): Determine the effect of the DNA demethylating drug 5-aza-2’-deoxycytidine (5-aza-dC) and histone deacetylase inhibitor Valproic Acid (VPA) on sst2 mRNA, internalization and cAMP signaling in NET cell lines BON and QGP.
Materials and methods: After 7 days treatment with 5-aza-dC, VPA or both, sst2 mRNA values were determined by Q-RT-PCR, as well as the effect on uptake of [125I-Tyr3]octreotide and in BON on the inhibition of forskolin-stimulated cAMP expression by octreotide.
Conference: 12th Annual ENETS Conference (2015)
Category: Basic Science - Genetics, epigenetics, miRNAs
Presenting Author: Marije Jildau Veenstra
Keywords: NET, sst2, epidrug, signaling

To read results and conclusion, please login ...

Further abstracts you may be interested in

#976 Upregulation of Somatostatin Receptor Type 2 Expression in Neuroendocrine Tumors by Epigenetic Modulation
Introduction: The somatostatin receptor type 2 (sst2) is a target for treatment of neuroendocrine tumors (NETs). However, epigenetic mechanisms might account for the high variability in sst2 expression and treatment response between patients.
Conference: 11th Annual ENETS Conference (2014)
Category: Basic Science - Genetics, epigenetics, miRNAs
Presenting Author: MSc Marije J Veenstra
Keywords: GEP-NET, sst2, epigenetics
#2275 Analysis of Gene Expression Patterns of Rectum Neuroendocrine Tumors (NET) Versus Healthy Tissue Reveals Alterations in the MAPK and WNT Signaling Pathways
Introduction: The neuroendocrine tumors (NETs) of the rectum are rare but increasing in incidence, by means of improved endoscopic techniques and histological reporting. They often occur as small polypoid lesions and G1, and in most cases an incidental finding at endoscopy.
Conference: 15th Annual ENETS conference (2018)
Category: Basic Science - Signaling pathways, receptors, biomarkers
Presenting Author: Dr. Franziska Briest
#1075 Filamin-A Is Required for Somatostatin Receptor 2 (SST2) Stabilization, Signaling and Angiogenesis Regulation in Gastroenteropancreatic Neuroendocrine Tumors
Introduction: Somatostatin receptor type 2 (SST2) is the main pharmacological target for GEP-NETs. A subset of patients is resistant to somatostatin analogs (SSa), although the molecular mechanisms responsible for resistance are poorly understood. Several studies identified cytoskeleton protein as determinant in receptor anchoring and signaling
Conference: 12th Annual ENETS Conference (2015)
Category: Basic Science - mTOR and other pathways, signalling, receptors
Presenting Author: Eleonora Vitali
Keywords: FLNA, SST2, GEP-NET
#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
#1505 A Blood-Based Multi-Transcript Test, the NETest, Predicts and Defines PRRT Efficacy in Neuroendocrine Tumors
Introduction: Peptide receptor radionuclide therapy (PRRT) is an effective NET treatment. Predicting response is based on somatostatin receptor expression and efficacy evaluated by RECIST criteria. Both have limited accuracy. The NETest measures tumor activity in blood and correlates cell signaling and metabolism directly with tumor activity.
Conference: 13th Annual ENETS conference (2016)
Category: PRRT-Ablative therapies-Endoscopic treatment
Presenting Author: Professor Mark Kidd
Authors: Bodei L, Kidd M, Severi S, Drozdov I, ...
Keywords: NETest, PRRT