1. Academic Validation
  2. ARID1A is a coactivator of STAT5 that contributes to CD8+ T cell dysfunction and anti-PD-1 resistance in gastric cancer

ARID1A is a coactivator of STAT5 that contributes to CD8+ T cell dysfunction and anti-PD-1 resistance in gastric cancer

  • Pharmacol Res. 2024 Dec:210:107499. doi: 10.1016/j.phrs.2024.107499.
Fangqi Ma 1 Mingming Ren 2 Zhongqiu Li 3 Yujing Tang 4 Xiaoyu Sun 2 Yi Wang 2 Nida Cao 2 Xiaohong Zhu 2 Yan Xu 2 Rui Wang 5 Yumiao Shen 2 Ruohan Zhao 2 Zhaoyan Li 6 Milad Ashrafizadeh 7 Gautam Sethi 8 Furong Wang 9 Aiguang Zhao 10
Affiliations

Affiliations

  • 1 Department of Oncology, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China; Department of Traditional Chinese Medicine, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui 230001, China.
  • 2 Department of Oncology, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China.
  • 3 Henan Provincial People's Hospital, Zhengzhou University People's Hospital, Zhengzhou, Henan 450004, China.
  • 4 Obesity and Metabolism Medicine-Engineering Integration Laboratory, Department of General Surgery, The Third People's Hospital of Chengdu, The Affiliated Hospital of Southwest Jiaotong University, Chengdu, Sichuan 611756, China.
  • 5 Department of Gastroenterology, Shanghai Municipal Hospital of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 200071, China.
  • 6 Department of Traditional Chinese Medicine, School of Medicine Affiliated Ruijin Hospital, Shanghai Jiao Tong University, Shanghai 200025, China.
  • 7 Department of Radiation Oncology and Shandong Provincial Key Laboratory of Radiation Oncology, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, Shandong 250117, China.
  • 8 Department of Pharmacology and NUS Centre for Cancer Research (N2CR) Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117600, Singapore. Electronic address: phcgs@nus.edu.sg.
  • 9 Department of Pathology, the Huizhou Central People's Hospital, Guangdong Medical University, Huizhou, Guangdong 516002, China. Electronic address: ldyy_wangfr@lzu.edu.com.
  • 10 Department of Oncology, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China. Electronic address: lh2305@shutcm.edu.cn.
Abstract

ARID1A deletion mutation contributes to improved treatment of several malignancies with Immune Checkpoint inhibitors (ICIs). However, its role in modulating of tumor immune microenvironment (TIME) of gastric Cancer (GC) remains unclear. Here, we report an increase of CD8+ T cells infiltration in GC patients with ARID1A-mutation (MUT), which enhances sensitivity to ICIs. Kaplan-Meier survival analysis showed that ARID1A-mutation patients with gastrointestinal malignancies benefit from immunotherapy. Transcriptome analysis implicated that ARID1A regulates STAT5 downstream targets to inhibit T-cell mediated toxicity. Integrated dual luciferase assay and ChIP-qPCR analyses indicated that ARID1A coordinated with STAT5 to facilitate the transcription of the immunosuppressive factors TGF-β1 and NOX4. ARID1A recruited canonical BAF complex (cBAF) subunits, including SMARCB1 and SMARCD1, to sustain DNA accessibility. Downregulation of ARID1A reduced chromatin remodeling into configurations which make GC more sensitive to ICIs. In addition, targeting STAT5 effectively improved anti-PD-1 efficiency in ARID1A-wild type (WT) GC patients. Taken together, ARID1A is a coactivator of STAT5, function as a chromatin organizer in GC ICIs resistance, and targeting STAT5 is an effective strategy to improve the efficiency of ICIs in GC.

Keywords

ARID1A; CD8(+) T effector; Chromatin remodeling; Gastric cancer; STAT5.

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