Abstract Library

#4291 Novel genomic score predicts survival with immune checkpoint blockade in neuroendocrine neoplasms

Introduction: Immune checkpoint inhibition (ICI) has activity in Grade 3 (G3) neuroendocrine neoplasms (NENs) but predictive biomarkers of overall survival (OS) are currently lacking.

Conference:

Presenting Author:

Authors: Brar T, Sukrithan V, Le D, Xu M, Olowookere C,

Keywords: Neuroendocrine Neoplasm, Immunotherapy, Ipilimumab, Nivolumab, Immune checkpoint inhibitor, biomarker, genomic score,

#4285 Predictive biomarkers for immunotherapy efficacy in neuroendocrine neoplasms

Introduction: The application of immunotherapy in NENs is still in its early stages. Identifying reliable predictive biomarkers of efficacy is critical for research, enabling better selection of patients who are more likely to respond to immunotherapy and improving treatment success rates.

Conference:

Presenting Author: Liang Y

Authors: Liang Y, Sun Z, Jia X, Chen J,

Keywords: immunotherapy, biomarker, neuroendocrine neoplasm,

#4128 Validation of a 3-gene signature of response to axitinib in patients with advanced NETs

Introduction: Axitinib in combination with SSA significantly improved ORR and PFS per central blinded radiological assessment, as compared to placebo and SSA in 253 EP-NETs in the AXINET trial. The magnitude of the benefit, however, was limited. We recently described a 3-gene tumor transcriptomic signature predictive of response to axitinib in NET patients.

Conference:

Presenting Author: Lens-Pardo A

Authors: Lens-Pardo A, Carretero-Puche C, Antón-Pascual B, Capdevila J, Benavent M,

Keywords: axitinib, sunitinib, tyrosine kinase inhibitor, predictive biomarker, signature, elisa,

#3768 Predictive transcriptomic signature of response to axitinib in patients with advanced NETs included in the randomized, double-blind, placebo-controlled AXINET trial (GETNE 1107)

Introduction: Axitinib in combination with Octreotide LAR significantly improved ORR (13.2 vs 3.2%, OR 4.58, p=0.0045) and PFS (16.6 vs 9.9m, HR 0.71, p=0.017) per central blinded radiological assessment, as compared to placebo and SSA, in 256 patients with EP-NETs included in the AXINET trial (Garcia-Carbonero et al, ESMO 2021). The magnitude of the benefit, however, was limited.

Conference:

Presenting Author: Lens-Pardo A

Authors: Lens-Pardo A, Carretero C, Antón-Pascual B, Capdevila J, Benavent M,

Keywords: Axitinib, Tyrosine kinase inhibitor, predictive biomarker, signature,

#3726 Inflammation based index and tumor heterogeneity on pretherapeutic 68Ga DOTATOC PET/CT predict outcome in midgut neuroendocrine tumor patients treated with 177Lu-oxodotreotide

Introduction: Peptide receptor radionuclide therapy with 177Lu oxodotreotide (LuPRRT) is a standard treatment for the management of patients with inoperable metastatic well-differentiated neuroendocrine tumors of the midgut (iNET). As LuPRRT becomes widely used for a heterogeneous population of NET patients, practical predictive biomarkers are needed. Inflammation based index (IBI) derived from serum C reactive protein and albumin is associated with progression free survival (PFS) and overall survival (OS) in patients with PRRT for NETs. Ga-68 DOTATOC PET/CT (DOTAPET) assessment of lesion heterogeneity was predictive for response to PRRT.

Conference:

Presenting Author: Vija L

Authors: Vija L, Dierickx L, Kanoun S, Texier J, Terroir M,

Keywords: LuPRRT, GaDOTA PET/CT, neuroendocrine tumor, outcome,