Expression of TNFR2 by regulatory T cells in peripheral blood is correlated with clinical pathology of lung cancer patients.
CD4(+)FoxP3(+) regulatory T cells (Tregs) represent a major cellular mediator of cancer immune evasion. The expression of tumor necrosis factor receptor type II (TNFR2) on Tregs is reported to identify the maximally suppressive Treg population in both mice and human. We therefore investigated the phenotype and function of TNFR2(+) Tregs present in the peripheral blood (PB) of 43 lung cancer patients. Further, the association of TNFR2 expression on Tregs with clinicopathological factors was analyzed. The results showed that in the PB of lung cancer patients, Tregs expressed markedly higher levels of TNFR2 than conventional T cells (Tconvs). Expression of TNFR2 appeared to correlate better than CD25(+) and CD127(-) with FoxP3 expression. PB TNFR2(+) Tregs in lung cancer patients were more proliferative and expressed higher levels of the immunosuppressive molecule CTLA-4, and consequently more potently suppressed IFNγ production by cocultured CD8 CTLs. More importantly, higher TNFR2 expression levels on Tregs were associated with lymphatic invasion, distant metastasis and more advanced clinical stage of lung cancer patients. Therefore, our study suggests that TNFR2(+) Tregs play a role in promoting tumor progressive metastasis and expression of TNFR2 by PB Tregs may prove to be a useful prognostic marker in lung cancer patients.
['Yan|Fan|F|', 'Du|Ruijuan|R|', 'Wei|Feng|F|', 'Zhao|Hua|H|', 'Yu|Jinpu|J|', 'Wang|Changli|C|', 'Zhan|Zhongli|Z|', 'Ding|Tingting|T|', 'Ren|Xiubao|X|', 'Chen|Xin|X|', 'Li|Hui|H|']
D000328:Adult D000368:Aged D018414:CD8-Positive T-Lymphocytes D005260:Female D006801:Humans D016130:Immunophenotyping D007371:Interferon-gamma D008175:Lung Neoplasms D008297:Male D008875:Middle Aged D047889:Receptors, Tumor Necrosis Factor, Type II D050378:T-Lymphocytes, Regulatory
Clinical pathology Lung cancer Tumor necrosis factor receptor type II (TNFR2) Immunosuppression CD4+FoxP3+ regulatory T cells