Duhuo Jisheng decoction inhibits endoplasmic reticulum stress in chondrocytes induced by tunicamycin through the downregulation of miR-34a

International Journal of Molecular Medicine
Fayuan LiuXihai Li

Abstract

Our previous study showed that Duhuo Jisheng decoction (DHJSD) inhibited chondrocyte apoptosis by the mitochondria-dependent signaling pathway. Endoplasmic reticulum (ER) stress is upstream of the mitochondria-dependent signaling pathway and has been shown to promote chondrocyte apoptosis that occurs in osteoarthritis (OA). The present study aimed to evaluate whether DHJSD inhibits the chondrocyte apoptosis by regulating ER stress. DHJSD enhanced the viability of tunicamycin (TM)‑exposed chondrocytes, a model of ER stress-induced apoptosis, in a dose‑ and time‑dependent manner, as shown by MTT assay. The present results showed that DHJSD and sodium 4-phenylbutyrate (PBA), an ER stress inhibitor, reduced TM‑induced chondrocyte apoptosis by 4',6-diamidino‑2-phenylindole staining. To gain insight into the mechanisms of DHJSD that are responsible for enhancing the viability and inhibiting TM‑induced chondrocyte apoptosis, the associated mRNA expressions and protein levels were detected by reverse transcription‑polymerase chain reaction (RT‑PCR) and western blot analysis, respectively. The results showed that the expression levels of Xbp1, Xbp1s and Bcl‑2 were increased, and the expression levels of Bip, Atf4, Chop, Bax, caspase‑9 a...Continue Reading

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Citations

Jul 28, 2020·Evidence-based Complementary and Alternative Medicine : ECAM·Zhencheng XiongMingsheng Tan
Feb 11, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Magdalena KusaczukMarzanna Cechowska-Pasko
May 31, 2021·Pharmacological Research : the Official Journal of the Italian Pharmacological Society·Ivo Ricardo de Seabra Rodrigues DiasLiang Liu

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