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OBJECTIVE:To investigate the effect of total saponins of Man medicine Thladiantha dubia root(TSTR)on the ex-pressions of CD3+,CD4+and CD8+ in spleen tissue of rats with type Ⅱ collagen-induced arthritis (CIA),and explore its mecha-nism in the treatment of rheumatoid arthritis(RA). METHODS:8 rats were taken as normal control group(NC group),the others 72 rats were injected mixture of bovine type Ⅱ collagen and Freund's complete adjuvant in tail and back to induce CIA model. The 50 modeled rats were randomly divided into model group(MC group),tripterygium polyglycoside(TG)group(12 mg/kg,posi-tive control),TSTR low-dose,medium-dose,high-dose groups (20,40,80 mg/kg),10 in each group. Rats in medicine groups were intragastrically administrated for 35 d,once a day;rats in NC group and MC group were intragastrically administrated equal volume of distilled water. Ankle swelling degree of rats was determined,arthritis indexes were calculated,HE staining was used to observe the lesions in synovial tissue,and immunohistochemistry was used to detect the expressions of CD3+,CD4+,CD8+ in spleen tissue of rats. RESULTS:After 35 d of administration,ankle swelling degree,arthritis indexes,CD4+ expression in spleen tissue,and CD4+/CD8+ ratio in MC group were significantly higher than NC group (P<0.05 or P<0.01),expressions of CD3+, CD8+were significantly lower than NC group(P<0.05);and there was congestion and massive inflammatory cell infiltration in sy-novial tissue. The ankle swelling degree,arthritis indexes,expression of CD4+ in spleen tissue,and CD4+/CD8+ ratio in administra-tion groups were significantly lower than MC group(P<0.05);the expressions of CD3+,CD8+ in spleen tissue in administration groups were significantly higher than MC group (P<0.05);TG group,TSTR medium-dose and high-dose groups showed mild congestion and a small amount of inflammatory cell infiltration in synovial tissue of rats,and TSTR low-dose group showed no ob-vious congestion or inflammatory cell infiltration. CONCLUSIONS:Up-regulating the expressions of CD3+,CD8+ and down-regu-lating the expression of CD4+ may be one of the mechanisms of TSTR in the treatment of RA;and with best efficacy when the TSTR dose of 20 mg/kg.
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AIM To establish the model of type Ⅱ collagen(CⅡ) induced arthritis in mice. METHODS The type Ⅱ collagen induced arthritits(CIA) mice were induced by intradermal injection with CⅡ and complete Freund adjnvant emulsion. RESULITS In comparison with control mice, the arthritic swelling and index were significant increased. The responses of CⅡ induced delayed type hypersensitivity were remarkably positive, and IgG anti bodies to CⅡ in serum could be detected in CIA mice. CONCLUSION The model CIA mice was successfully established.
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Objective:Research on establishing a better experimental arthritis rat model of cold-dampness arthraligia on rheumatoid arthritis(RA) research.Methods:In order to induce arthritis,the rat's feet were injected with different concentrations of type Ⅱ collagen mixed with Freund's adjuvant;measure the feet swelling degrees of rats,then calculated swelling rate;detect the level of serum sialic acid(SA);observ the synovial histopathology and ultrastructural of rats.Results:The rat joints swell of the group with low concentration of type Ⅱ collagen and completed Freund's adjuvant was rapid and severe,while that of the group with high concentration of type Ⅱ collagen and incompleted Freund's adjuvant was moderate and lasting.The level of serum SA of model groups was higher than the normal group.The histopathology changes of rat's synovium conform to RA.Conclusion:The group injected with high concentration of type Ⅱ collagen and incompleted Freund's adjuvant is the ideal RA model.It is belonged to the symptom of cold-dampness arthralgia,compared with this model,the AA approaches the symptom of heat-dampness arthralgia.
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Objective To replicate a model of type Ⅱ collagen (C Ⅱ) induced arthritis in C57BL/6 mice. Methods C57BL/6 mice were immunized by intradermal injection at the base of the tail with chick type Ⅱ collagen and complete Freund adjuvant emulsion, followed by another injection 21 days later. Manifestations of joint ailment, pathological examination, and T cell subtypes detected by FCM were observed. Results In comparison with control mice, the C57BL/6 mice developed CIA with high incidence (70%) and severity after immunization. Hyperplasia of the synovium and inflammatory infiltration were observed. The percentage of Th1 cells in the peripheral blood of the mice was significantly increased in the peripheral mononuclear cells (PBMC). Conclusion The CIA model of C57BL/6 mice and the platform its study were successfully established.