Abstract Library

#3067 Somatostatin Analogs in Real‐World Practice for Patients with Metastatic Neuroendocrine Tumors: A Single Institution Experience in the Ouest of Algeria (CHU Oran)

Introduction: The efficacy of somatostatin analogs (SSAs) were clearly established trough pivotal trials as first‐line agents for neuroendocrine tumors (NETs), but their use in clinical practice is largely unknown.

Conference: 17th Annual ENETSConcerence (2020)

Presenting Author:

Authors: Ameziane N, Behourah Z, Aida M, Ahed Messaoud M, Bousahba A,

Keywords: GEP-NET, Somatostatin analogs, anti proliferative action, anti secretory action, Management real world practice,

#3048 Somatostatin Analogs or Active Surveillance in Sporadic Non-Functioning Pancreatic Neuroendocrine Tumors

Introduction: Non-functioning (NF), sporadic pancreatic neuroendocrine tumors (pNETs) have usually an indolent behavior, but sometimes show an unpredictable aggressiveness. Surgery is the first-choice for localized tumors >2 cm. Unresectable or metastatic lesions expressing somatostatin receptors (SSTRs) are treated with Somatostatin analogs (SSAs). No evidence of SSAs efficacy exists in tumors ≤2 cm, for which active surveillance has been proposed.

Conference: 17th Annual ENETSConcerence (2020)

Presenting Author:

Authors: Schinzari G, Maiorano B, Rossi E, Bianchi A, Chiloiro S,

Keywords: pNET, non-functioning, sporadic, somatostatin analogs, surveillance,

#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,

#3044 Efficacy of Alkylating Agent Re-challenge after Therapeutic Pause in Metastatic Pancreatic Neuroendocrine Tumors (PanNET)

Introduction: Temozolomide (TMZ) and dacarbazine (DTIC) are alkylating agents (ALK) with antitumor efficacy in metastatic PanNET. Rechallenging ALK following prior efficacy is commonly performed but has not been evaluated.

Conference: 17th Annual ENETSConcerence (2020)

Presenting Author:

Authors: De Rycke O, Walter T, Perrier M, Hentic O, Lombard-Bohas C,

Keywords: alkylating agents, pancreatic NET, re-challenge, chemotherapy,

#3034 Somatostatin Analogs for Pancreatic Neuroendocrine Tumors: Is There Any Benefit When Ki-67 Is ≥ 10%?

Introduction: The antiproliferative effect of first-line long acting somatostatin analogs (SSA) in advanced gastro-entero-pancreatic neuroendocrine tumors (GEP-NETs) was shown in the PROMID and the CLARINET trials. Efficacy data in pancreatic NETs (PanNETs) with Ki-67 ≥ 10% are limited.

Conference: 17th Annual ENETSConcerence (2020)

Presenting Author: Merola E

Authors: Merola E, Alonso Gordoa T, Zhang P, Al-Toubah T, Pelle E,

Keywords: Pancreatic NET, Somatostatin Analogs, Grade 2 and 3, Safety, Efficacy,