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 language | English |
|---|---|
| Article number | 5013 |
| Journal | Nature Communications |
| Volume | 13 |
| Issue number | 1 |
| DOIs | |
| State | Published - 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).
| Funders | Funder 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 Fund | 91-022-19 |
| American Cancer Society-Michigan Cancer Research Fund | |
| National Childhood Cancer Registry – National Cancer Institute | R21CA259721 |
| National Childhood Cancer Registry – National Cancer Institute | |
| National Institute of General Medical Sciences DP2GM119177 Sophie Dumont National Institute of General Medical Sciences | 1R35GM138212 |
| National Institute of General Medical Sciences DP2GM119177 Sophie Dumont National Institute of General Medical Sciences | |
| Congressionally Directed Medical Research Programs | ME210108 |
| Congressionally Directed Medical Research Programs | |
| Children's Cancer Research Institute, Vienna | CRI4342 |
| Children's Cancer Research Institute, Vienna | |
| V Foundation for Cancer Research | V2018-023 |
| 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