Maghsoudi Hossein
Payame Noor University, Iran
Posters & Accepted Abstracts: Altern Integr Med
Rheumatoid arthritis (RA) joints are in a hypoxic condition. Hypoxia-induced migration and invasion of fibroblast-like synoviocytes (FLSs) are considered to play a critical role in the pathogenesis of RA. Among the key genes upregulated by hypoxia-inducible factor-1�± (HIF-1�±), CXC chemokine receptor 4 (CXCR4) plays an important role in FLS migration and invasion. Our previous studies have shown that kaempferol exerts anti-arthritic effects by inhibiting FLS migration and invasion under normoxic conditions. However, the effect and molecular mechanisms underlying the effect of kaempferol on hypoxia-induced FLS migration and invasion are poorly understood. In the present study, we assessed the effect of kaempferol on hypoxia-induced FLS migration and invasion. Results showed that kaempferol suppressed hypoxia-induced FLS migration and invasion. In addition, we also found that celastrol inhibited hypoxia-induced CXCR4 expression at both the mRNA and the protein levels in RA-FLSs. Meanwhile, it is revealed that kaempferol inhibited the transcriptional activity of CXCR4 under hypoxic conditions by suppressing the binding activity of HIF-1�± in the CXCR4 promoter, and blocked hypoxia-induced accumulation of nuclear HIF-1�±. Furthermore, treatment with HIF-1�± inhibitor reduced the hypoxia-induced expression and transcriptional activity of CXCR4. In conclusion, our results indicate that kaempferol inhibits hypoxia-induced migration and invasion via suppression of HIF-1�± mediated CXCR4 expression in FLSs under hypoxic conditions. These results provide a strong rationale for further testing and validation of the use of kaempferol as a new alternative for using in the treatment of RA. hossein_m2002@yahoo.com
Alternative & Integrative Medicine received 476 citations as per Google Scholar report
Spanish 
Chinese 
Russian 
German 
French 
Japanese 
Portuguese 
Hindi 