Role of TGF beta-1 in Regulating Pancreatic Neuroendocrine Tumor Cell Viability Abstract #1089

Introduction: Neuroendocrine tumors (NETs) are heterogeneous neoplasms arising from neuroendocrine cells spread in the respiratory and gastro-entero-pancreatic epithelium. The role of transforming growth factor beta-1 (TGF b-1) in NET biology is largely unknown. TGF b-1 signaling pathway is tumor suppressive in most non-transformed epithelial cell lines. In contrast, many human carcinomas are refractory to the growth–inhibitory effects of TGF b-1.
Aim(s): To investigate if TGF b-1 may modulate cell viability and apoptosis in NET of the pancreas (pNET) and to understand whether TGF b-1 may influence the effects of therapeutic molecules currently used in the management of pNETs.
Materials and methods: 20 primary cultures obtained from surgical samples of pNETs were treated with TGF b-1 and/or Everolimus, a mTOR inhibitor. Cell viability and caspase activity were evaluated.
Conference: 12th Annual ENETS Conference (2015)
Category: Basic Science - mTOR and other pathways, signalling, receptors
Presenting Author: PhD student Simona Falletta
Keywords: pNET, TGF-b1, Everolimus

To read results and conclusion, please login ...

Further abstracts you may be interested in

#1086 mTOR Down-Stream Signaling Pattern May Predict pNET Response to Everolimus
Introduction: NETs are rare neoplasms arising from neuroendocrine cells spread in the respiratory and gastro-entero-pancreatic epithelium. The mammalian target of rapamycin (mTOR) pathway plays a central role in the regulation of cell growth, metabolism, and apoptosis representing a novel molecular target. This pathway is constitutively activated in pancreatic NETs (pNETs) providing the basis for the development of specific mTOR inhibitors as new therapeutic tools.
Conference: 12th Annual ENETS Conference (2015)
Category: Basic Science - mTOR and other pathways, signalling, receptors
Presenting Author: PhD student Simona Falletta
Keywords: pNET, Everolimus, mTOR
#1090 p27kip1 Is Involved in the Resistance of Human Bronchial Carcinoids to m-TOR Inhibitors
Introduction: Bronchial carcinoids (BC) are still orphan of medical therapy. We previously demonstrated that the typical BC human cell line NCI-H727 is sensitive to Everolimus (E), in terms of cell viability reduction, with a G0 cell-cycle arrest, while the atypical human BC cell line NCI-H720 is not. The mechanisms underlying this phenomenon have not been clarified
Conference: 12th Annual ENETS Conference (2015)
Category: Basic Science - mTOR and other pathways, signalling, receptors
Presenting Author: Master Degree Katiuscia Benfini
Keywords: RAD001, BC, p27kip1, Cell cycle
#1494 CDK-Inhibitors as New Therapeutic Treatment for Human Bronchial Carcinoids
Introduction: Bronchial Carcinoids (BC) are still orphan of medical therapy. We previously demonstrated that 70% of primary BC cultures are sensitive to Everolimus (E), an mTOR inhibitor, while 30% are not. We also observed that in 2 human BC cell lines, the NCI-H720 (sensitive to E) and NCI-H727 (resistant to E), mTOR resistance may be linked to a differential cell cycle protein expression (CyclinD1/E, CDK2/4, p27kip1/p27kip1phospho-Ser10), which is higher in BC resistant to E as compared to sensitive ones, suggesting an impaired p27 function
Conference: 13th Annual ENETS conference (2016)
Category: Medical treatment - Others
Presenting Author: MASTER DEGREE Katiuscia Benfini
#1224 A Randomized Open-label Phase II Study of Everolimus Alone or in Combination with Pasireotide LAR in Advanced, Progressive Pancreatic Neuroendocrine Tumors (pNET): COOPERATE-2 Trial
Introduction: Pasireotide is a somatostatin analog (SSA) that targets somatostatin receptor subtypes 1-3 and 5. An earlier phase I study showed antitumor activity of everolimus+pasireotide LAR (EVE+PAS) in NET.
Conference: 12th Annual ENETS Conference (2015)
Category: Medical treatment - Targeted therapies
Presenting Author: Dr. Matthew H Kulke
#840 Clinical Impact of Everolimus Cumulative Dose on Pancreatic Neuroendocrine Tumors (pNETs) Outcome
Introduction: Everolimus is approved for advanced pancreatic neuroendocrine tumors (pNETs).
Conference: 11th Annual ENETS Conference (2014)
Category: Medical treatment - Targeted therapies
Presenting Author: Rossana Berardi