[Regulation effect of scorpio and scolopendra on CD4 + CD25 + FoxP3 + Treg cell in peripheral blood from rats with collagen-induced arthritis (CIA)].

Objective: To study the regulation effect of Scorpio and Scolopendra on CD4 + CD25 + FoxP3 + Treg Cell in peripheral blood from rats with collagen-induced arthritis.

Methods: Sixty female Wistar rats were randomly divided into 6 groups, normal control group, model control group, low-dose, middle-dose and high-dose Scorpio and Scolopendra group,and the type II collagen group. Rats' arthritis was induced by collagen. The number of CD4 + CD25 + FoxP3 + Treg cell in peripheral blood was tested by flow cytometry, and the level of IL-2 in serum was detected by enzyme linked immunosorbent assay.

Results: Compared with the model groups,the levels of CD4 + CD25 + Treg cell and CD4 + CD25 + FoxP3 + Treg cell were increased obviously in the high and low dose of Scorpio and Scolopendra groups (P < 0.05 or P < 0.01), while the level of IL-2 in serum was decreased remarkably in the middle and low dose of Scorpio and Scolopendra groups (P < 0.05 or P < 0.01).

Conclusion: It is realized that Scorpio and Scolopendra effectively treat RA by regulating the level of CD4 + CD25 + FoxP3 + Treg cell to restore immunological tolerance.