Abstract
CD39/CD73-adenosine pathway has been recently defined as an important tumor-induced immunosuppressive mechanism. We here documented a fraction of CD11b+CD33+ myeloid-derived suppressor cells (MDSCs) in peripheral blood and tumor tissues from non-small cell lung cancer (NSCLC) patients expressed surface ectonucleotidases CD39 and CD73. Tumor TGF-β stimulated CD39 and CD73 expression, thereby inhibited T cell and NK cell activity, and protected tumor cells from the cytotoxic effect of chemotherapy through ectonucleotidase activity. Mechanistically, TGF-β triggered phosphorylation of mammalian target of rapamycin, and subsequently activated hypoxia-inducible factor-1α (HIF-1α) that induced CD39/CD73 expression on MDSCs. CD39 and CD73 on MDSCs, therefore, link their immunosuppressive and chemo-protective effects to NSCLC progression, providing novel targets for chemo-immunotherapeutic intervention.
Original language | English (US) |
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Article number | e1320011 |
Journal | OncoImmunology |
Volume | 6 |
Issue number | 6 |
DOIs | |
State | Published - Jun 3 2017 |
Keywords
- CD39
- CD73
- MDSCs
- NSCLC
- TGF-β
ASJC Scopus subject areas
- Oncology
- Immunology and Allergy
- Immunology