Open AccessAvidity‐Based Selection of Tissue‐Specific CAR‐T Cells from a Combinatorial Cellular Library of CARs
Author(s) -
Ma Peixiang,
Ren Ping,
Zhang Chuyue,
Tang Jiaxing,
Yu Zheng,
Zhu Xuekai,
Fan Kun,
Li Guanglei,
Zhu Wei,
Sang Wei,
Min Chenyu,
Chen Wenzhang,
Huang Xingxu,
Yang Guang,
Lerner Richard A.
Publication year - 2021
Publication title -
advanced science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.388
H-Index - 100
ISSN - 2198-3844
DOI - 10.1002/advs.202003091
Subject(s) - avidity , chimeric antigen receptor , antigen , cd38 , t cell , in vitro , biology , cancer research , microbiology and biotechnology , immunology , chemistry , immune system , stem cell , biochemistry , cd34
Using T‐cell chimeric antigen receptors (CAR‐T) to activate and redirect T cells to tumors expressing the cognate antigen represents a powerful approach in cancer therapy. However, normal tissues with low expression of tumor‐associated antigens (TAAs) can be mistargeted, resulting in severe side effects. An approach using a collection of T cells expressing a diverse, 10 6 ‐member combinatorial cellular library of CARs, in which members can be specifically enriched based on avidity for cell membrane antigens, is reported. Using CD38 as the target antigen, an efficient and effective selection of CARs specifically recognizing CD38 + tumor cells is demonstrated. These selected CAR‐T's produce cytokines known to be associated with T cell activation in a CD38 expression‐dependent manner. This avidity‐based selection endows the engineered T cells with minimal off‐tumor effects, while retaining robust antitumor efficacy both in vitro and in vivo. The described method may facilitate the application of CAR‐T therapy to TAAs previously considered undruggable.