目的探讨白芍总苷(TGP)对胶原性关节炎(CIA)大鼠滑膜β抑制蛋白1、2表达的影响与其抑制成纤维样滑膜细胞(FLS)增殖的关系。方法采用CCⅡ诱导大鼠CIA模型,TGP(25、50、100 mg.kg-1.d-1)、雷公藤多苷(GTW)(40 mg.kg-1.d-1)灌胃给药(d 14~28),进行大鼠多发性关节炎指数评分;MTT法检测FLS的增殖;Western blot法检测不同剂量TGP体内给药对β抑制蛋白1、2表达的影响。结果 TGP(25、50、100 mg.kg-1,ig,d 14~28)可明显减轻CIA大鼠多发性关节炎指数,抑制FLS增殖反应;TGP可下调β抑制蛋白2的表达;TGP对β抑制蛋白2表达的影响与其抑制FLS增殖作用呈高度相关。结论 TGP可抑制FLS的增殖,其机制可能与其下调β抑制蛋白2的表达有关。
Aim To elucidate the correlation between effects of total glucosides of paeony(TGP) on expression of β-arrestins and inhibition on synoviocyte proliferation from CIA rats.Methods CIA model in rats was induced by injection of chicken type Ⅱ collagen(CCII) emulsion.TGP(25,50,100 mg·kg-1·d-1) was adminisered intragastricly to CIA rats during d 14~28.Synoviocyte proliferation was determined by MTT assay.The expression of β-arrestins in synoviocytes from CIA rats was measured by Western blot.Results TGP(25,50,100 mg ·kg-1,ig,d 14~28) could inhibit synoviocyte proliferation and reduce the expression of β-arrestin 2 greatly in synovial tissue of CIA rats.The effects of TGP on the expression of β-arrestin 2 had a positive correlation with the inhibition of TGP on synoviocyte proliferation.Conclusion TGP can inhibit synoviocyte proliferation of CIA rats,which may be related to downregulating the expression of β-arrestin 2.