S-15 in combination of Akt inhibitor promotes the expansion of CD45RA^-CCR7⁺ tumor infiltrating lymphocytes with high cytotoxic potential and downregulating PD-1⁺Tim-3⁺ cells as well as regulatory T cells.

ABSTRACT:

Background

Autologous tumor-infiltrating lymphocytes (Tils) immunotherapy is a promising treatment in patients with advanced hepatocellular cancer. Although Tils treatment has shown great promise, their persistence and the efficacy after adoptive-transfer are insufficient and remain a challenge. Studies have demonstrated that IL-15 and Akt inhibitor can regulate T cell differentiation and memory. Here, we constructed S-15 (Super human IL-15), a fusion protein consisting of human IL-15, the sushi domain of the IL-15 receptor α chain and human IgG-Fc. Herein we compared the effects of S-15 with IL-2 or in combination with Akti on the expansion and activation of Tils.

Methods

Hepatocellular cancer tissues were obtained from 6 patients, Tils were expanded using IL-2, IL-2/S-15,

SUBMITTER: Xu B 

PROVIDER: S-EPMC6889332 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature