한빛사논문
강원대학교
Kun-Joo Lee,1,9 Donghoon Choi,2,9 Nara Tae,3 Ha Won Song,4 Yeon-Woo Kang,1 Minji Lee,2 Dain Moon,1 Youngsik Oh,1 Sujeong Park,1 Ji-Hae Kim,1 Siheon Jeong,1 Jaehyuk Yang,1 Uni Park,1 Da Hee Hong,5 Mi-Sun Byun,5 Su-Hyung Park,6 Joohyuk Sohn,7 Yunji Park,1 Sun-Kyoung Im,2 Sun Shim Choi,4,* Dae Hee Kim,3,8,* and Seung-Woo Lee 1,10,*
1Department of Life Sciences, Pohang University of Science and Technology, Pohang 37673, Republic of Korea
2Research Institute of NeoImmuneTech, Inc., Pohang 37673, Republic of Korea
3Kangwon Institute of Inclusive Technology, Kangwon National University, Chuncheon 24341, Republic of Korea
4Division of Biomedical Convergence, College of Biomedical Science, Institute of Bioscience & Biotechnology, Kangwon National University, Chuncheon 24341, Republic of Korea
5Genexine Inc., Seoul 07789, Republic of Korea
6Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea
7Division of Medical Oncology, Department of Internal Medicine, Yonsei Cancer Center, Yonsei University College of Medicine, Seoul 03722, Republic of Korea
8College of Pharmacy, Kangwon National University, Chuncheon 24341, Republic of Korea
9These authors contributed equally
10Lead contact
*Corresponding authors: correspondence to Sun Shim Choi, Dae Hee Kim or eung-Woo Lee
Abstract
Bispecific T cell engagers (TCEs) show promising clinical efficacy in blood tumors, but their application to solid tumors remains challenging. Here, we show that Fc-fused IL-7 (rhIL-7-hyFc) changes the intratumoral CD8 T cell landscape, enhancing the efficacy of TCE immunotherapy. rhIL-7-hyFc induces a dramatic increase in CD8 tumor-infiltrating lymphocytes (TILs) in various solid tumors, but the majority of these cells are PD-1-negative tumor non-responsive bystander T cells. However, they are non-exhausted and central memory-phenotype CD8 T cells with high T cell receptor (TCR)-recall capacity that can be triggered by tumor antigen-specific TCEs to acquire tumoricidal activity. Single-cell transcriptome analysis reveals that rhIL-7-hyFc-induced bystander CD8 TILs transform into cycling transitional T cells by TCE redirection with decreased memory markers and increased cytotoxic molecules. Notably, TCE treatment has no major effect on tumor-reactive CD8 TILs. Our results suggest that rhIL-7-hyFc treatment promotes the antitumor efficacy of TCE immunotherapy by increasing TCE-sensitive bystander CD8 TILs in solid tumors.
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