Anti-inflammatory effect of peroxisome proliferator-activated receptor-γin non-obese diabetic mice / 中华风湿病学杂志

ABSTRACT

Objective To investigate the anti-inflammatory effect of peroxisome proliferator-activated receptor-γ(PPAR-γ)in non-obese diabetic mice(NOD mice)with Sj(o)gren's syndrome(SS)．Methods Twenty 8-weeks-old female NOD mice were randomly divided into 2 groups．Rosiglitazone and normal saline were administered for the rosiglitazone group and control group respectively．At age of 12 weeks and 15 weeks，one mouse in the rosiglitazone group and the control group were killed respectively,and the others were sacrificed at the age of 17 weeks．Blood were obtained by cardiac puncture，and minor salivary glands (MSG) were resected．The histopathological changes waere examined by H&E staining．The level of IL-1β，IL-4，IL-6 and TNF-α in serum were measured by ELISA．Real-time PCR waft used to evaluate the mRNA expression level of IL-1β，IL-4，IL-6 and TNF-α in MSG．Student's t-test was used to assess the differences．Results Compared with the control group，the mice in the rosiglitazone group showed that：①histopatho-logical change was significantly ameliorated．②At the age of 17 weeks，IL-6[(26±7)vs(37±11)，t=-2．298] and TNF-α[(57±22)vs(79±21)，t=-2．188] were expressed significantly lower and IL-4[(26±13)vs(12±4)，t=2．438 ] was expressed significantly higher in serum(P<0．05)．③The expression of TNF-αwas significantly decreased and the expression of IL-4 was significantly increased in MSG (P<0．05)．Conclusion PPAR-γ can ameliorate SS on NOD mice effectively．The mechanism may be related to reduction of Th1 cytokines，and the Th1/Th2 balance is changed into Th2 predominant．