Objective To investigate the changes of peripheral blood T cell subsets and serum soluble interleukin-2 receptor (sIL-2R),vascular endothelial growth factor (VEGF) and LDH in patients with diffuse large B cell lymphoma,and to investigate their relationship of the cellular immune function,clinical stage and disease progression.Methods 35 cases of DLBCL patients were selected as observe group,20 cases of healthy individuals as normal control group.Peripheral blood T cell subsets were detected by flow cytometry.Serum soluble interleukin-2 receptor (sIL-2R) and vascular endothelial growth factor (VEGF) were detected by ELISA assay.Serum levels of LDH were detected by the rate method for measuring.Results The expression levels of CD4,NK cells and CD4/CD8 ratios in all patients with DLBCL were lower than healthy individuals [(68.62±12.82) ％ vs(73.00±6.12) ％,(14.28±7.93) ％ vs (39.49±12.01) ％,(1.03±0.84) vs (1.45±0.28),all P ＜ 0.05].Serum sIL-2R in patients with DLBCL was significantly higher than healthy individuals [(501.50±157.70).μg/L vs (128.30±82.40) μg/L,P＜ 0.001].Serum levels of sIL-2R with Ⅲ-Ⅳ stage in patients with DLBCL was higher than that in ones with Ⅰ-Ⅱ stage [(618.38±192.22) μg/L vs (432.45±75.48)μg/L,P ＜ 0.05].Serum expression levels of sIL-2R in patients with DLBCL with B symptoms was higher than that in ones with A symptoms [(616.50±183.03) μg/L vs (441.52±103.48) μg/L,P ＜ 0.01].The expression levels of VEGF,LDH in patients with DLBCL were higher than healthy individuals [(304.03±163.05) pg/ml vs (156.25±47.83) pg/ml,(300.74±300.91) U/L vs (177.00±32.14) U/L,both P ＜ 0.05].The high expression level of serum sIL-2R was correlated with low CD4/CD8 ratio (r =0.4635,P ＜ 0.05).The high expression levels of serum sIL-2R was correlated with the high expression levels of serum VEGF,LDH (r =0.447,P ＜ 0.05; r =0.448,P ＜ 0.05).Conclusion High expression levels of serum sIL-2R in DLBCL are closely associated to low cellular immune function,tumor burden in vivo,disease progression and invasion.

Objective To investigate the correlation between expression levels of serum cytokines IL-2,IL-6, IL-8, IL-10, TNF-α and IFN-γ in patients with diffuse large B-cell lymphoma(DLBCL) and chemotherapy resistance. Methods 30 cases of DLBCL patients with chemotherapy resistant, 30 cases of DLBCL patients with chemotherapy sensitive and 20 cases of healthy individuals as normal control group were enrolled. The levels of serum cytokines IL-2, IL-6, IL-8, IL-10, TNF-α and IFN-γbefore, during and after treatment in both DLBCL groups and normal control group were detected by ELISA assay. Results The expression level of serum IL-6 and IL-10 before treatment in DLBCL patients with chemotherapy resistance was significantly higher than that in DLBCL patients with chemotherapy sensitive and normal control group (P ＜ 0.05), however,that after treatment in DLBCL patients with chemotherapy resistance was significantly lower than that before treatment (P = 0.02, P = 0.015). The level of serum IL-6 and IL-10 in patients with DLBCL recurrence into drug resistance was higher than that during of remission (P = 0.004, P ＜0.001). Before treatment, the expression level of serum IL-6 in patients with Ⅲ-Ⅳ stage in chemotherapy resistant group was significantly higher than that in ones with Ⅰ - Ⅱ stage(P ＜0.05). Levels of IL-2, IL-8, TNF-α and IFN-γin chemotherapy resistant group, chemotherapy sensitive group and the normal control group were no differences (P ＞0.05).Conclusion The expression levels of the serum IL-6 and IL-10 were closely correlated with the chemotherapy efficacy of DLBCL, they may be involved in drug resistance of DLBCL.