Inducible Costimulator and Its Ligand Promote Proliferation and Migration of Tumor Cells in Cutaneous T-Cell Lymphoma.

ABSTRACT: Inducible costimulator (ICOS) is a costimulatory immune checkpoint receptor expressed on activated T-cells, while the ICOS ligand (ICOSL) is expressed on antigen-presenting cells. The ICOS-ICOSL axis promotes the survival of memory and effector T-cells and induces several immune responses. In addition, the ICOS-ICOSL interaction induces cell proliferation, cell survival, and cytokine production. The roles of ICOS and ICOSL in cutaneous T-cell lymphoma (CTCL) are unclear. In this study, we examined the roles of ICOS and ICOSL in CTCL. The tumor cells co-expressed ICOS and ICOSL, and the upregulated expression of ICOS and ICOSL reflected disease severity. Anti-ICOS and anti-ICOSL neutralizing antibodies inhibited both the in vitro and in vivo proliferation of CTCL cell lines. The anti-ICOSL

SUBMITTER: Oka K 

PROVIDER: S-EPMC12897944 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature