ABSTRACT
Objective@#To preliminary analysis of the characteristics of lymphocyte subsets in peripheral blood among 135 cases of coal worker’s pneumoconiosis patients in Huainan mining area.@*Methods@#The peripheral bloods of 135 cases of coal worker’s pneumoconiosis patients and 112 cases of health examiners were collected. Flow cytometry was used to detect peripheral blood lymphocytes, T cell subsets and CD4+CD25+ regulatory T cells.@*Results@#Compared with the control group, CD64 index of granulocytes and lymphocytes was slightly higher. The total T cells (CD3+) increased in peripheral blood, CD4+ expression was reduced and CD8+ expression was increased in infection group, CD4+/CD8+ ratio was inverted, the differences between the infection group and the control group were statistically significant (P<0.05) . There were significantly fewer NK (nature killer) and B cells, significantly more double negative T cells (DNT, CD3+CD4-CD8-) than the control group (P<0.05) . There was no statistically significant difference of CD4+CD25+CD127+low、CD4+CD25+CD127+hi and the ration of Treg/CD4+CD25+CD127+hi protein expression in peripheral blood in two groups (P>0.05) .@*Conclusion@#The analysis of peripheral blood lymphocyte and subgroup is an ideal index to monitor the immune status of coal worker's pneumoconiosis patients. It has theoretical significance for studying the immune mechanism of pneumoconiosis and guiding clinical treatment.