Abstract library

130 results for "van Koetsveld".
#2905 DNA Methyltransferase Inhibitor Hydralazine Induces Upregulation of Somatostatin Type 2 Receptors in Human Neuroendocrine Tumor Cells
Introduction: Epidrugs like DNA methyltransferase inhibitors (DNMTi) can increase somatostatin receptor type 2 (SST2) expression in neuroendocrine tumor (NET) cells in vitro and in vivo. This effect could be used for NET patients with low SST2 expression who are currently ineligible for somatostatin analogue (SSA) treatment. However, the DNMTi known to stimulate SST2 have either a high toxicity profile or are not yet approved.
Conference: 17th Annual ENETS Conference 2020 (2020)
Category: Basic Science - Genetics, epigenetics, miRNAs, Omics
Presenting Author: Dr Julie Refardt
#2988 Epigenetic Treatment with Histone Deacetylase Inhibitor Enhances Uptake of [111In]In-DOTA-TATE by Increased SST2 Expression on Neuroendocrine Tumor Cells
Introduction: The somatostatin-2 receptor (SST2) is a target for peptide receptor radionuclide therapy (PRRT) in neuroendocrine tumors (NETs). By using epigenetic drugs, which can regulate gene transcription, PRRT efficacy may be further improved due to enhanced SST2 expression.
Conference: 17th Annual ENETS Conference 2020 (2020)
Category: Basic Science - Genetics, epigenetics, miRNAs, Omics
Presenting Author: MSc Ilva Klomp
#3047 Functional Consequence of β-Arrestin 1 Gene Knock-Out in Pancreatic Neuroendocrine Tumor Cell Line BON-1
Introduction: An important limiting factor influencing treatment efficacy of neuroendocrine tumors (NETs) with somatostatin analogs (SSA) is the availability of somatostatin receptors (SSTR) on NETs. While downregulation or altered pattern of SSTR expression are important considerations, receptor internalization/desensitization by β-arrestins may be a crucial contributing factor. Interestingly, our previous study showed a preferential higher expression of β-arrestin 1 (ARRB1), in gastroenteropancreatic NETS (GEP-NETs) compared to pituitary adenomas.
Conference: 17th Annual ENETS Conference 2020 (2020)
Category: Basic Science - Signaling pathways, receptors, biomarkers
Presenting Author: Dr Anand Iyer
#2847 Surgical and Survival Outcomes of Early Peptide Receptor Radionuclide Therapy for Downstaging Locally Advanced or Oligometastatic Pancreatic Neuroendocrine Neoplasms
Introduction: Pancreatic neuroendocrine neoplasm (pNEN) patients often present with locally advanced or metastatic disease. The objective response rate of peptide receptor radionuclide therapy (PRRT) in pNENs is 55%. Therefore, PRRT may be a possibility for patients who are not eligible for upfront curative surgery.
Conference: 17th Annual ENETS Conference 2020 (2020)
Category: Nuclear Medicine - Imaging and Therapy (PRRT)
Presenting Author: MD Noémie S Minczeles
#3045 Reliability and Agreement of Radiological and Pathological Tumor Size in Patients with MEN1-Related Pancreatic Neuroendocrine Tumors: Results from a Population-Based Cohort
Introduction: Pancreatic neuroendocrine tumors (pNETs) are the most lethal manifestation in patients with multiple endocrine neoplasia type 1 (MEN1). Tumor size is still regarded as the main prognostic factor and therefore used for surgical decision making.
Conference: 17th Annual ENETS Conference 2020 (2020)
Category: Imaging and Interventions (radiology, endoscopy)
Presenting Author: MD, MSc Dirk-Jan van Beek
#269 Expression of IGF/mTOR Pathway Components in Human Pheochromocytomas and In Vitro Inhibition of PC12 Rat Pheochromocytoma Cell Growth by mTOR Inhibitors
Introduction: The pathogenesis of pheochromocytomas (pheo) is poorly understood and malignant pheo need new treatment options. mTOR inhibitors, as sirolimus(S) and everolimus(E), are promising antineoplastic drugs.
Conference: 8th Annual ENETS Conference (2011)
Category: Basic
Presenting Author: MD Maria Cristina De Martino
#670 The Relationship Between the Ki-67 Protein and IGF-Related Genes in Gastroenteropancreatic Neuroendocrine Tumor Patients with Normal and Elevated Serum Chromogranin-A
Introduction: GEP-NETs are rare, heterogeneous neoplasms with a distinct biological and clinical behavior. Both IGF-system and Ki-67 indices have been reported as important stimulating factors in carcinogenesis and/or tumor progression. The tumor marker CgA is an independent predictor for survival as well. Currently no data are available about a possible interaction between IGF-system (IGF(-R)s, IRs, BPs) and Ki-67 protein in GEP-NET patients with normal and elevated serum CgA.
Conference: 10th Annual ENETS Conference 2013 (2013)
Category: Basic Science - In vitro models, tumor growth, CTCs
Presenting Author: Drs Roxanne Van Adrichem
Keywords: 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 (2013)
Category: Biomarkers
Presenting Author: MSc Marije J. Veenstra
#850 Expression of IGF/mTOR Pathway Components in Human Pheochromocytomas and In Vitro Inhibition of PC12 rat Pheochromocytoma Cell Growth by mTOR Inhibitors alone and in Combination with the Dual IGFI-R/INS-R Antagonist OSI-906
Introduction: Dysregulation of the mTOR and IGF pathways have been suggested to be involved in the pathogenesis of pheochromocytomas (PCC). mTOR inhibitors, such as sirolimus (S) and everolimus (E), as well as IGFI-R antagonists such as OSI-906, could be new a treatment for malignant PPC.
Conference: 11th Annual ENETS Conference 2014 (2014)
Category: Non digestive NETs (bronchial, MTC, pheochromocytoma)
Presenting Author: MD Maria Cristina De Martino
#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 (2014)
Category: Basic Science - Genetics, epigenetics, miRNAs
Presenting Author: MSc Marije J Veenstra
Keywords: GEP-NET, sst2, epigenetics