RESUMO
Objective To investigate the expression of CD4+CDhi25CDlow127 regulatory T cells (Treg cell), IL-2, IL-10 and IFN-γin peripheral blood of patients with different TNM stages of non-small cell lung cancer( NSCLC) , and to evaluate their correlation. Methods The proportion of CD4+CDhi25 CDlow127 Treg cells to CD4+cell in peripheral blood of 55 NSCLC patients were determined by flow cytometry, and levels of IL-2, IL-10 and IFN-γ were measured by ELISA. The proportion of CD4+CDhi25 CDlow127 Treg cells, IL-2, IL-10 and IFN-γ of patients with different TNM stages of NSCLC were compared, and correlation analysis was carried on. Results The proportion of CD4+CDhi25 CDlow127 Treg cells increased obviously together with the increasing of TNM stages of NSCLC(P<0. 05),so did the level of IL-10 (P<0. 05). On the other hand, the level of IL-2 and IFN-γdecreased apparently with the increasing of TNM sta-ges of NSCLC(P<0. 05). CD4+CDhi25CDlow127Treg cells and IL-10 were positively correlated(P <0. 05). IL-2 and IFN-γ were positively correlated too(P<0. 05). CD4+CDhi25CDlow127Treg cells and IL-10 were all negatively correlated with IL-2 and IFN-γ(P<0. 05). Conclusion The increasing of CD4+ CDhi25CDlow127Treg cells and IL-10 and the de-creasing of IL-2 and IFN-γ are possibly one of the reasons of antitumor immunity suppression in terminal NSCLC patients. The surveillance for them can be reference indicators to evaluate antitumor immunity status of terminal lung cancer patients.