Abstract library

18 results for "PTHrP".
#616 Assessment of DNA Double-Strand Breaks in Blood Lymphocytes after Whole-Body Radiation Exposure in Patients with Neuroendocrine Tumors Undergoing 177Lu-Octreotate Therapy
Introduction: Peptide receptor radionuclide therapy using somatostatin receptor-binding peptides, such as 177Lu-Octreotate (LuTate), has been clinically proven to be effective in treating patients with inoperable neuroendocrine tumors. Despite the rather high radiation exposure, only few side effects have been reported. However, blood cells are very sensitive to radiation. Therefore, it is important to determine how much radiation they received. Recently, the detection by immunofluorescence of the phosphorylation of the histone variant H2AX (γ‐H2AX) has been established as a reliable and sensitive technique to monitor DNA double-strand breaks (DSBs) in blood lymphocytes.
Conference: 10th Annual ENETS Conference (2013)
Category: Basic Science - Genetics, epigenetics, miRNAs
Presenting Author: Dr Delphine Denoyer
#1202 Role of Amplifications in the PIK3/Akt/mTOR-Pathway in Neuroendocrine Tumors of the Small Intestine
Introduction: Amplifications in the PIK3/Akt/mTOR pathway can lead to increased proliferation and reduced apoptosis, resulting in the development of various cancers. Recently, amplifications of Akt1/2, PDGFRα/β and mTOR in small intestine neuroendocrine tumors (siNET) have been shown.
Conference: 12th Annual ENETS Conference (2015)
Category: Basic Science - mTOR and other pathways, signalling, receptors
Presenting Author: Maike Hoffmeister
#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
#118 Gastrointestinal motility in patients with neuroendocrine tumors
Introduction: Diarrhea is the most common symptom in patients with intestinal neuroendocrine tumors (NET). Somatostatin analogues reduce stool frequency and may increase gastrointestinal transit time (GITT). Motility tracking system® MTS-1 (MTS) (Motilis, Switzerland) is a novel, safe, almost non-invasive and easy-to-perform method for description of gastrointestinal motility.
Conference: 7th Annual ENETS Conference (2010)
Category: Clinical
Presenting Author: Tine Gregersen
#143 Association of somatostatin receptor 2 immunohistochemical expression with [111In]-DTPA octreotide scintigraphy and [68Ga]-DOTATOC PET/CT in neuroendocrine tumors
Introduction: In the absence of preoperative somatostatin receptor (sst) scans, knowledge of immunohistochemical sst2 tumor expression may help in predicting the success of somatostatin analogue-based follow-up studies and treatment of neuroendocrine tumors (NETs).
Conference: 7th Annual ENETS Conference (2010)
Category: Clinical
Presenting Author: Dr. Karsten Müssig
#653 Interobserver Variability of Pulmonary Carcinoids
Introduction: Lung carcinoids are neuroendocrine tumors histopathologically classified into typical (TC; no necrosis, <2 mitoses/2 mm2) and atypical (AC; necrosis or 2-10 mitoses/2 mm2). Identification of mitoses may be hampered by the presence of apoptotic cells, and reported prediction of prognosis based on histopathology varies, especially for ACs.
Conference: 10th Annual ENETS Conference (2013)
Category: PRRT-Ablative therapies-Endoscopic treatment
Presenting Author: MSc Dorian Swarts
#912 Serial 89Zr-bevacizumab PET in Patients with Neuroendocrine Tumors before and on Everolimus Treatment
Introduction: Everolimus increases PFS in patients with advanced NETs. Currently, no biomarkers are available for early selection of patients who will benefit from everolimus. Everolimus can reduce VEGF-A production by tumor cells.
Conference: 11th Annual ENETS Conference (2014)
Category: Imaging (radiology, nuclear medicine, endoscopy)
Presenting Author: MD, PhD Adrienne H Brouwers
#975 Electron Microscopy of Pancreatic Beta Cell Neuroendocrine Tumors (NETs) in Multiple Endocrine Neoplasia Type 1 (MEN1) Knockout Mice Reveal an Adenomatous Phenotype with Depletion of Insulin Granules and Increased Mitochondrial Content
Introduction: Insulinomas are β cell neuroendocrine tumors (NETs) that secrete insulin, and ~4% of insulinoma patients have multiple endocrine neoplasia type 1 (MEN1). One in ten MEN1 patients present with an insulinoma. Previous reports describe insulinomas as possibly having typical granules (46.4%) or atypical smaller granules (34.3%), both associated with adenomas, or agranular cells (14.3%) associated with carcinomas. MEN1 knockout (Men1+/-) mice develop pancreatic NETs that are mostly insulinomas, and their ultrastructural phenotype is unknown. We hypothesized that these may resemble the adenoma phenotype with atypical granules.
Conference: 11th Annual ENETS Conference (2014)
Category: Basic Science - Genetics, epigenetics, miRNAs
Presenting Author: Dr Gerard V Walls
Authors: Walls G V, Clark A, Thakker R, ...
Keywords: GEP-NET
#1256 Characterization and Rescue of a Pathogenic D63N Mutant Human Glucagon Receptor That Causes a Pancreatic Neuroendocrine Tumor Syndrome (Mahvash disease)
Introduction: We have previously demonstrated that inactivating glucagon receptor (GCGR) mutations cause a novel hereditary human disease of hyperglucagonemia, pancreatic α cell hyperplasia, and pancreatic neuroendocrine tumor (Mahvash disease). We recently identified a novel missense GCGR mutation, D63N, in a family with Mahvash disease.
Conference: 13th Annual ENETS conference (2016)
Category: Basic Science - Genetics, epigenetics, miRNAs
Presenting Author: Dr. Run Yu
Authors: Yu R, Zhou C, Chen C R, ...
#1267 Two Cases of Parathyroid Cancer with Pulmonary Metastasis
Introduction: Parathyroid cancer(PC) is a rare disease accounting for less then 1% of all patients with primary hyperparathyroidism. The prognosis of patients with parathyroid carcinoma is variable; more than 50% have a persistent or recurrent disease due to a regional or distant disease.
Conference: 13th Annual ENETS conference (2016)
Category: Pathology, grading, staging
Presenting Author: Iya Voronkova