Abstract Library

#3073 The Role of Rb as a Prognostic Factor in Grade 3 Poorly Differentiated Neuroendocrine Carcinoma (G3NEC) Treated by First Line Platinum-Etoposide Combination, a Retrospective Study

Introduction: G3NEC are heterogeneous and aggressive diseases which can arise in different organs. Platinum-etoposide combination is used as first line treatment whatever the primary. Rb has been suggested to be a predictive/prognostic factor.

Conference: 17th Annual ENETSConcerence (2020)

Presenting Author: Hadoux J

Authors: Hadoux J, Kanaan C, Planchard D, Malka D, Ducreux M,

Keywords: Neuroendocrine carcinoma, Platinum-etoposide, Rb,

#3072 Rb and p53 Status Determination by Immunochemistry Is Complementary in Routine Practice to Genetic Testing of Neuroendocrine Neoplasms

Introduction: Rb and p53 status may help distinguishing well from poorly differentiated neuroendocrine neoplasms (NEN) and may predict response to chemotherapy. Studies correlating Rb/p53 genetic and immunohistochemistry were performed on high-quality frozen samples with high throughput techniques efficient for copy number determination. This situation differs from routine practice in which small deletions may be hard to detect on formalin-fixed paraffin-embedded (FFPE) samples with a gene panel approach.

Conference: 17th Annual ENETSConcerence (2020)

Presenting Author: Cros J

Authors: Chen R, Lacroix L, De Rycke O, Lacombe C, Cazes A,

Keywords: rb, p53, aggressive neuroendocrine tumors, biomarker,

#3068 WHO Grade 3 Gastroenteropancreatic Neuroendocrine Neoplasm (GEP-NEN): Data from 358 Patients of the Spanish Group of Neuroendocrine and Endocrine Tumors Registry (R-GETNE)

Introduction: RGETNE national NEN Registry comprises 74 hospitals from all regions of Spain.

Conference: 17th Annual ENETSConcerence (2020)

Presenting Author:

Authors: Garcia Carbonero R, Jimenez-Fonseca P, Benavent M, Alonso V, Crespo G,

Keywords: G3 NEN, epidemiology, survival, patterns of care, response to chemotherapy,

#3051 Epidemiology, Pathological and Clinical Features of 4307 Patients with Gastroenteropancreatic Neuroendocrine Neoplasms (GEP-NEN) of the Spanish Neuroendocrine Cancer Registry (R-GETNE)

Introduction: RGETNE national NEN Registry comprises 74 hospitals from all regions of Spain.

Conference: 17th Annual ENETSConcerence (2020)

Presenting Author:

Authors: Garcia Carbonero R, Jimenez-Fonseca P, Benavent M, Alonso V, Alonso T,

Keywords: GEP-NEN, tumor registry, survival, prognosis, epidemiology,

#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 ENETSConcerence (2020)

Presenting Author: Iyer A

Authors: Iyer A, Vriens J, Dogan-Oruç F, van Koetsveld P, Hofland L,

Keywords: β-arrestin 1, CRISPR-Cas9, BON-1, knock-out, SSTR, SSA, Pan-NET,