Amiselimod (MT-1303), a novel sphingosine 1-phosphate receptor-1 functional antagonist, inhibits progress of chronic colitis induced by transfer of CD4+CD45RBhigh T cells

Autoři: Kyoko Shimano aff001;  Yasuhiro Maeda aff001;  Hirotoshi Kataoka aff001;  Mikako Murase aff001;  Sachiko Mochizuki aff001;  Hiroyuki Utsumi aff001;  Koichi Oshita aff001;  Kunio Sugahara aff001
Působiště autorů: Sohyaku, Innovative Research Division, Mitsubishi Tanabe Pharma Corporation, Yokohama, Japan aff001
Vyšlo v časopise: PLoS ONE 14(12)
Kategorie: Research Article


Amiselimod (MT-1303) is a novel sphingosine 1-phosphate receptor-1 (S1P1 receptor) modulator with a more favorable cardiac safety profile than other S1P1 receptor modulators. MT-1303 phosphate (MT-1303-P), an active metabolite of MT-1303, exhibits S1P1 receptor agonism at a lower EC50 value than other S1P1 receptor modulators currently being developed. We aimed to evaluate the efficacy of MT-1303 and its mode of action in chronic colitis using an inflammatory bowel disease (IBD) model. Oral administration of MT-1303 (0.3 mg/kg) once daily for 3 days to mice almost completely abolished S1P1 receptor expression on CD4+ T cells from mesenteric lymph nodes, which corresponded to a marked decrease in CD4+ T cell count in peripheral blood, indicating that MT-1303-P acts as a functional antagonist of the S1P1 receptor. The potential benefit of MT-1303 for IBD was assessed using immunodeficient SCID mice with chronic colitis induced by adoptive transfer of CD4+CD45RBhigh T cells from BALB/c mice. An oral dose of 0.1 and 0.3 mg/kg MT-1303 administered daily one week after the cell transfer inhibited the development of chronic colitis with an efficacy comparable to that of an anti-mTNF-α mAb (250 μg/mouse). In addition, MT-1303 administration significantly reduced the number of infiltrating Th1 and Th17 cells into the lamina propria of the colon in colitis mice. Our results suggest that MT-1303 acts as a functional antagonist of the S1P1 receptor on lymphocytes, regulates lymphocyte trafficking, and inhibits infiltration of colitogenic Th1 and Th17 cells into the colon to inhibit the development of chronic colitis.

Klíčová slova:

Body weight – Colitis – Colon – Lymphocytes – Mouse models – T cell receptors – T cells – T helper cells


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2019 Číslo 12
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