Division of Biological Sciences, Section of Molecular Biology, University of California San Diego, San Diego, California, USA.
Division of Signaling and Gene Expression, La Jolla Institute for Immunology, La Jolla, California, USA.
J Clin Invest. 2021 Apr 1;131(7). doi: 10.1172/JCI143729.
Adoptive T cell therapies (ACTs) hold great promise in cancer treatment, but low overall response rates in patients with solid tumors underscore remaining challenges in realizing the potential of this cellular immunotherapy approach. Promoting CD8+ T cell adaptation to tissue residency represents an underutilized but promising strategy to improve tumor-infiltrating lymphocyte (TIL) function. Here, we report that deletion of the HIF negative regulator von Hippel-Lindau (VHL) in CD8+ T cells induced HIF-1α/HIF-2α-dependent differentiation of tissue-resident memory-like (Trm-like) TILs in mouse models of malignancy. VHL-deficient TILs accumulated in tumors and exhibited a core Trm signature despite an exhaustion-associated phenotype, which led to retained polyfunctionality and response to αPD-1 immunotherapy, resulting in tumor eradication and protective tissue-resident memory. VHL deficiency similarly facilitated enhanced accumulation of chimeric antigen receptor (CAR) T cells with a Trm-like phenotype in tumors. Thus, HIF activity in CD8+ TILs promotes accumulation and antitumor activity, providing a new strategy to enhance the efficacy of ACTs.
过继性 T 细胞疗法(ACT)在癌症治疗中具有巨大的潜力,但实体瘤患者的总体反应率较低,这突显了在实现这种细胞免疫疗法方法的潜力方面仍然存在挑战。促进 CD8+T 细胞适应组织驻留是提高肿瘤浸润淋巴细胞(TIL)功能的一种未被充分利用但很有前途的策略。在这里,我们报告在恶性肿瘤的小鼠模型中,CD8+T 细胞中缺氧诱导因子负调节因子 von Hippel-Lindau(VHL)的缺失诱导了组织驻留记忆样(Trm-like)TIL 的缺氧诱导因子-1α(HIF-1α)/缺氧诱导因子-2α(HIF-2α)依赖性分化。尽管存在衰竭相关表型,但缺乏 VHL 的 TIL 在肿瘤中积累,并表现出核心 Trm 特征,这导致保留了多功能性和对 αPD-1 免疫疗法的反应,从而导致肿瘤消除和保护性组织驻留记忆。VHL 缺乏同样促进了嵌合抗原受体(CAR)T 细胞在肿瘤中积累具有 Trm-like 表型。因此,CD8+TIL 中的 HIF 活性促进了积累和抗肿瘤活性,为增强 ACT 的疗效提供了一种新策略。
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