Randomised phase III study of S-1 alone versus S-1 plus lentinan for unresectable or recurrent gastric cancer (JFMC36-0701).

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Randomised phase III study of S-1 alone versus S-1 plus lentinan for unresectable or recurrent gastric cancer (JFMC36-0701).

Eur J Cancer. 2016 Sep;65:164-71

Authors: Yoshino S, Nishikawa K, Morita S, Takahashi T, Sakata K, Nagao J, Nemoto H, Murakami N, Matsuda T, Hasegawa H, Shimizu R, Yoshikawa T, Osanai H, Imano M, Naitoh H, Tanaka A, Tajiri T, Gochi A, Suzuki M, Sakamoto J, Saji S, Oka M

Abstract
BACKGROUND: Lentinan (LNT) is a purified β-1, 3-glucan that augments immune responses. The present study was conducted to assess the efficacy of LNT in combination with S-1 as a first-line treatment for unresectable or recurrent gastric cancer.
PATIENTS AND METHODS: Eligible patients were randomly assigned to receive S-1 alone or S-1 plus LNT. The primary end-point was overall survival (OS). Secondary end-points were time-to-treatment failure (TTF), overall response rate (ORR), safety, quality of life (QOL), and biomarker. The percentages of LNT-binding monocytes in peripheral blood prior to treatment were analysed for the biomarker assessment.
RESULTS: One hundred and fifty-four and 155 patients were randomly assigned to receive S-1 alone or S-1 plus LNT, respectively. The median OS was 13.8 and 9.9 months (P = 0.208), the median TTF was 4.3 and 2.6 months (P < 0.001), the ORR was 22.3% and 18.7% for the S-1 and S-1 plus LNT groups, respectively. The incidences of haematologic and non-haematologic adverse events were similar, and no significant changes in QOL scores were observed during the treatment in both groups. In a subpopulation of patients with LNT-binding monocytes ≥2%, patients who received more than two cycles of chemotherapy showed a longer survival time in the S-1 plus LNT group.
CONCLUSIONS: OS did not improve and TTF was significantly worse in the S-1 plus LNT group as compared with the S-1-only group. This study showed no efficacy of LNT when combined with S-1 treatment in patients with unresectable or recurrent gastric cancer.
CLINICAL TRIAL REGISTRATION ID NUMBER: UMIN 000000574.

PMID: 27501505 [PubMed - indexed for MEDLINE]

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