Abstract Library

#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,

#2962 90Y- and/or 177Lu-DOTATOC Re-Challenge in Patients with Progressive Neuroendocrine Tumors

Introduction: Most patients treated with PRRT will eventually progress. Previous studies indicated that repeated PRRT is feasible and promising.

Conference: 17th Annual ENETSConcerence (2020)

Presenting Author: Aberle S

Authors: Aberle S, Benz M, Grokovski R, Christ E, Nicolas G,

Keywords: PRRT, Re-challenge, 90Y-DOTATOC, 177Lu-DOTATOC, neuroendocrine tumor,

#2817 METNET: A Phase II Trial of Metformin in Patients with Well Differentiated Neuroendocrine Tumors

Introduction: Preclinical studies have suggested that metformin has antitumor effects, likely due to blockage of mTOR pathway through AMPK and decreased insulin levels. A retrospective study showed that metformin combined with everolimus to treat related hyperglycemia offered longer progression-free survival (PFS) in patients (pts) with pancreatic neuroendocrine tumors (NET).

Conference: 17th Annual ENETSConcerence (2020)

Presenting Author: Glasberg J

Authors: Glasberg J, Talans A, Lopez R, Recchimuzzi D, Riechelmann R,

Keywords: neuroendocrine tumors, metformin, clinical trial,

#2234 High Rate of Copy-Number Alterations in Gastrointestinal and Pancreatic Neuroendocrine Tumors with Unidentified Driver Mutations

Introduction: The driving genetic alteration leading to neuroendocrine tumor (NET) development has been reported for primary tumors of pancreatic origin, but not for metastases. Moreover, even for primary tumor a significant “dark matter” remains to be explored.

Conference: 15th Annual ENETSConcerence (2018)

Presenting Author: Tirosh A

Authors: Tirosh A, Killian J, Zhu Y, Neychev V, Meltzer P,

Keywords: GEP-NET, Driver mutation, Copy-number, Metastases,

#1798 Safety and Efficacy of 14-Day Dosing Interval of Lanreotide Autogel/Depot (LAN) for Patients wth Pancreatic or Midgut Neuroendocrine Tumours (NETs) Progressing on LAN Every 28 Days: The Prospective, Open-label, International, Phase 2 CLARINET FORTE Study

Introduction: CLARINET demonstrated the antitumour effect of LAN 120mg/28 days (standard interval) in metastatic gastroenteropancreatic NETs. If disease progresses (PD) on this dose, aggressive treatments (eg targeted therapies) are usually offered.

Conference: 14th Annual ENETSConcerence (2017)

Presenting Author:

Authors: Pavel M, Dromain C, Majdi A, Houchard A,

Keywords: Lanreotide, dosing interval,