Lentinan (LNT) is a purified β-1, 3-glucan and augments immune responses.
A phase III study of S-1 versus S-1 plus LNT was conducted for advanced gastric cancer.
This study showed no efficacy of LNT combined with S-1 treatment.
LNT-binding monocytes were analysed for the biomarker assessment.
In S-1 plus LNT group, long survivors were seen in subgroup of patients with a high percentage of LNT-binding monocytes.