期刊
CELLULAR & MOLECULAR IMMUNOLOGY
卷 7, 期 5, 页码 389-395出版社
CHIN SOCIETY IMMUNOLOGY
DOI: 10.1038/cmi.2010.28
关键词
lung cancer; programmed death-1; tumor-infiltrating lymphocyte
类别
资金
- National High Biotechnology Development Program of China [2006AA02A247]
T-cell tolerance is an important mechanism for tumor escape, but the molecular pathways involved in T-cell tolerance remain poorly understood. It remains unknown whether the inhibitory immunoreceptor programmed death-1 (PD-1) plays a role in conditions of human non-small cell lung cancer (NSCLC). In this study, we detected PD-1 expression on CD8(+) T cells from healthy control peripheral blood mononuclear cells (PBMCs) and the PBMCs of NSCLC patients as well as NSCLC tissues. Results showed that tumor-infiltrating CD8(+) T cells had increased PD-1 expression and impaired immune function, including reducing cytokine production capability and impairing capacity to proliferate. Blockade of the PD-1/PD-L1 pathway by the PD-L1-specific antibody partially restored cytokine production and cell proliferation. These data provide direct evidence that the PD-1/PD-L1 pathway is involved in CD8(+) T-cell dysfunction in NSCLC patients. Moreover, blocking this pathway provides a potential therapy target in lung cancer. Cellular & Molecular Immunology (2010) 7, 389-395; doi:10.1038/cmi.2010.28; published online 31 May 2010
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