Selective suppression of melanoma lacking IFN-γ pathway by JAK inhibition depends on T cells and host TNF signaling

Hongxing Shen, Fengyuan Huang, Xiangmin Zhang, Oluwagbemiga A. Ojo, Yuebin Li, Hoa Quang Trummell, Joshua C. Anderson, John Fiveash, Markus Bredel, Eddy S. Yang, Christopher D. Willey, Zechen Chong, James A. Bonner, Lewis Zhichang Shi

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

Therapeutic resistance to immune checkpoint blockers (ICBs) in melanoma patients is a pressing issue, of which tumor loss of IFN-γ signaling genes is a major underlying mechanism. However, strategies of overcoming this resistance mechanism have been largely elusive. Moreover, given the indispensable role of tumor-infiltrating T cells (TILs) in ICBs, little is known about how tumor-intrinsic loss of IFN-γ signaling (IFNγR1KO) impacts TILs. Here, we report that IFNγR1KO melanomas have reduced infiltration and function of TILs. IFNγR1KO melanomas harbor a network of constitutively active protein tyrosine kinases centered on activated JAK1/2. Mechanistically, JAK1/2 activation is mediated by augmented mTOR. Importantly, JAK1/2 inhibition with Ruxolitinib selectively suppresses the growth of IFNγR1KO but not scrambled control melanomas, depending on T cells and host TNF. Together, our results reveal an important role of tumor-intrinsic IFN-γ signaling in shaping TILs and manifest a targeted therapy to bypass ICB resistance of melanomas defective of IFN-γ signaling.

Original languageEnglish
Article number5013
JournalNature Communications
Volume13
Issue number1
DOIs
StatePublished - Dec 2022

Bibliographical note

Publisher Copyright:
© 2022, The Author(s).

Funding

We would like to acknowledge other members of Shi lab and the Department of Radiation Oncology at UAB for their constructive input. We are grateful for the Startup fund from the Department of Radiation Oncology and the O’Neal Invests pre-R01 Grant from the UAB-O’Neal Comprehensive Cancer Center granted to Shi lab. This study is also funded by National Institutes of Health grants (1R21CA230475-01A1 and 1R21CA259721-01A1), the V Foundation Scholar Award (V2018-023), a DoD-Congressionally Directed Medical Research Programs grant (ME210108), a Cancer Research Institute CLIP Grant (CRI4342), an American Cancer Society Institutional Research Grant (91-022-19), and National Institute of General Medical Sciences (1R35GM138212). We would like to acknowledge other members of Shi lab and the Department of Radiation Oncology at UAB for their constructive input. We are grateful for the Startup fund from the Department of Radiation Oncology and the O’Neal Invests pre-R01 Grant from the UAB-O’Neal Comprehensive Cancer Center granted to Shi lab. This study is also funded by National Institutes of Health grants (1R21CA230475-01A1 and 1R21CA259721-01A1), the V Foundation Scholar Award (V2018-023), a DoD-Congressionally Directed Medical Research Programs grant (ME210108), a Cancer Research Institute CLIP Grant (CRI4342), an American Cancer Society Institutional Research Grant (91-022-19), and National Institute of General Medical Sciences (1R35GM138212).

FundersFunder number
Department of Radiation Oncology
UAB-O’Neal Comprehensive Cancer Center
National Institutes of Health (NIH)1R21CA230475-01A1
National Institutes of Health (NIH)
American Cancer Society-Michigan Cancer Research Fund91-022-19
American Cancer Society-Michigan Cancer Research Fund
National Childhood Cancer Registry – National Cancer InstituteR21CA259721
National Childhood Cancer Registry – National Cancer Institute
National Institute of General Medical Sciences DP2GM119177 Sophie Dumont National Institute of General Medical Sciences1R35GM138212
National Institute of General Medical Sciences DP2GM119177 Sophie Dumont National Institute of General Medical Sciences
Congressionally Directed Medical Research ProgramsME210108
Congressionally Directed Medical Research Programs
Children's Cancer Research Institute, ViennaCRI4342
Children's Cancer Research Institute, Vienna
V Foundation for Cancer ResearchV2018-023
V Foundation for Cancer Research
University of Alabama, Birmingham

    ASJC Scopus subject areas

    • General Chemistry
    • General Biochemistry, Genetics and Molecular Biology
    • General
    • General Physics and Astronomy

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