Lanreotide as maintenance therapy after first-line treatment in patients with non-resectable duodeno-pancreatic neuroendocrine tumours: An international double-blind, placebo-controlled randomised phase II trial - Prodige 31 REMINET: An FFCD study

Abstract

Background: Following European guidelines, patients with aggressive metastatic or locally advanced, non-resectable, duodeno-pancreatic (DP) neuroendocrine tumours (NETs) should receive systemic combination chemotherapy until progression. Aggressive disease is defined as progressive and/or symptomatic metastases with or without significant hepatic invasion (>30-50%), and/or bone metastases.

Methods: This academic randomised, double-blind, placebo-controlled phase II study aims to evaluate lanreotide autogel 120 mg (LAN) as maintenance treatment after at least 2 months of first-line treatment (L1) in aggressive G1-G2 DP-NET. Patients were randomly assigned in a 1:1 ratio to receive LAN or placebo (PBO), every 28 days, until progression or toxicity. The primary end-point was progression-free survival (PFS) at 6 months.

Results: Among the 118 planned patients, 53 were included. Of these, 81.1% had a G2 tumour, and 90.6% had metastatic disease. L1 therapy consisted of chemotherapy (96.8%). Median duration of L1 was 4.6 months (range: 2.0-7.7). At the time of randomisation, 81.1% of patients had stable disease. Median follow-up was 27.0 months (95% CI: 19.5; 31.2). PFS at 6 months was 73.1% (90% CI: 55.3; 86.6) in LAN versus 54.2% (90% CI: 35.8; 71.8) in PBO. Median PFS was 19.4 months (95% CI: 7.6; 32.6) and 7.6 months (95% CI: 3.0; 9.0), respectively. Median overall survival was 41.9 months in PBO and was not reached in LAN. The toxicity profile was mainly grade 1-2 expected toxicities.

Conclusions: The encouraging results of lanreotide autogel 120 mg as a maintenance treatment after L1 in aggressive G1/2 DP-NET should be confirmed.

Trial registration: NCT02288377 (clinicaltrials.gov).

Keywords: Clinical trial; Duodeno-pancreatic; Maintenance; Neuroendocrine tumours; Non-resectable.

Conflict of interest statement

Conflict of interest statement Côme Lepage worked as a member of the advisory board for Novartis, personal fees from Novartis, IPSEN, grants from Merck, IPSEN. Thomas Walter worked as a member of advisory boards for AAA, IPSEN, Keocyt and Novartis. Astrid Lièvre reports grants from Bayer Lilly, Merck and Novartis; personal fees from AAA, Amgen, Bayer, Bristol-Myers Squibb, Celgene, HalioDx, Incyte, Ipsen, Lilly, Merck, Novartis, Pierre Fabre, Roche, Sandoz, Sanofi and Servier; non-financial support from AAA, Amgen, Bayer, Incyte, Ipsen, Merck, Novartis, Pierre Fabre, Pfizer, Roche, Sandoz, Servier and Integragen. David Tougeron reports grants from Bristol-Myers Squibb and Novartis; personal fees from Amgen, Bayer, Bristol-Myers SquibbIpsen, Novartis, Pierre Fabre, Roche, Sanofi and Servier. Catherine Lombard-Bohas worked as a member of advisory boards for AAA, IPSEN, Keocyt, Novartis. Jean-Louis Legoux worked as a member of an advisory board for Novartis, reports personal fees from Novartis, Pfizer (clinical research), Novartis, Keocyt, Servier (courses, training), Merck, Servier, Keocyt (invitations to national or international congresses). All remaining authors have no conflicts of interest to declare.

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