ABSTRACT
Objective To observe the expression level of CD4+ CD25+ Foxp3+ regulatory T cells in the peripheral blood of acute and stable senile COPD patients ,and analyze the correlation between Treg cells and TGF‐β1 of senile COPD ,then investigate the role of Treg cells and TGF‐β1 in the onset of senile COPD .Methods Totally 26 patients with acute stage and 23 patients with stable stage were investigated as acute group and stable group ,they came from the department of geriatric of our hospital form March ,2012 to February ,2014 .Meanwhile ,20 healthy people were selected as control group .The proportion of Treg cells in pe‐ripheral blood was measured by flow cytometry method and the level of TGF‐β1 in serum was measured by ELISA .Results The percentage of Treg on peripheral blood in acute and stable groups were significantly higher than control group(P0 .05) .Conclusion Treg cells may be involved in the process of the pathogenesis of senile COPD and acute exacerbation .There is no correlation between the proportion of Treg cells and TGF‐β1 ,and it indicates immune disorders may exist in senile COPD patients .