Abstract
Summary Effector T cells and fibroblasts are major components in the tumor microenvironment. The means through which these cellular interactions affect chemoresistance is unclear. Here, we show that fibroblasts diminish nuclear accumulation of platinum in ovarian cancer cells, resulting in resistance to platinum-based chemotherapy. We demonstrate that glutathione and cysteine released by fibroblasts contribute to this resistance. CD8+ T cells abolish the resistance by altering glutathione and cystine metabolism in fibroblasts. CD8+ T-cell-derived interferon (IFN)γ controls fibroblast glutathione and cysteine through upregulation of gamma-glutamyltransferases and transcriptional repression of system xc- cystine and glutamate antiporter via the JAK/STAT1 pathway. The presence of stromal fibroblasts and CD8+ T cells is negatively and positively associated with ovarian cancer patient survival, respectively. Thus, our work uncovers a mode of action for effector T cells: they abrogate stromal-mediated chemoresistance. Capitalizing upon the interplay between chemotherapy and immunotherapy holds high potential for cancer treatment.
Original language | English (US) |
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Pages (from-to) | 1092-1105 |
Number of pages | 14 |
Journal | Cell |
Volume | 165 |
Issue number | 5 |
DOIs | |
State | Published - May 19 2016 |
Funding
This work is supported (in part) by the Department of Defense ( W81XWH-10-1-0865 ), the NIH grants ( CA123088 , CA099985 , CA156685 , CA171306 , CA190176 , CA193136 , and 5P30CA46592 ), the Ovarian Cancer Research Fund , and Marsha Rivkin Center for Ovarian Cancer Research . This work utilized Metabolomics Core Services supported by grant U24 DK097153 of NIH Common Funds Project to the University of Michigan. We thank Kathleen Cho for her intellectual support. We thank D. Postiff, M. Vinco, R. Craig, and J. Barikdar for their assistance. We thank Chunhai Ruan and Charles F. Burant at the Metabolomics Core, Ted J. Huston at the Department of Earth and Environmental Sciences, Peng Huang at the University of Texas, and Stephen B. Howell at the University of California San Diego for their support. We appreciate the support from Barbara and Don Leclair.
ASJC Scopus subject areas
- General Biochemistry, Genetics and Molecular Biology