Osteoarthritis (OA) is a joint disease in which cartilage degradation is the hallmark pathological change. In this study, we investigated the anti-osteoarthritic effects of DHEA in rabbit chondrocytes. Polymerase chain reaction was performed to evaluate the expression of a disintegrin and metalloproteinase with thrombospondin motifs (ADAMTS)-4, ADAMTS-5, aggrecan and collagen type 2. In addition, ERK1/2 signaling pathway components were analyzed by Western blotting. In IL-1β-induced chondrocytes, the phosphorylation of ERK1/2 was enhanced, and the downstream catabolic genes, including ADAMTS-4 and ADAMTS-5, were upregulated, while the anabolic genes aggrecan and collagen type 2 were downregulated. DHEA administration restored the IL-1β-induced imbalance in anabolic and catabolic gene expression. In addition, the phosphorylation of ERK1/2 was suppressed by DHEA. Then, PD98059 was used to block the ERK1/2 signaling pathway. The protective effect of DHEA was significantly increased when ERK1/2 signaling was inactivated. DHEA may exert its protective effect by suppressing ADAMTS in an ERK1/2-dependent manner in rabbit chondrocytes.

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11584127PMC
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0313560PLOS

Publication Analysis

Top Keywords

erk1/2 signaling
12
rabbit chondrocytes
8
adamts-4 adamts-5
8
aggrecan collagen
8
collagen type
8
signaling pathway
8
phosphorylation erk1/2
8
dhea
5
erk1/2
5
dehydroepiandrosterone inhibits
4

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!