Protective effects of Nebivolol against interleukin-1β (IL-1β)-induced type II collagen destruction mediated by matrix metalloproteinase-13 (MMP-13)

Cell Stress & Chaperones
Zhigang LiBorui Li

Abstract

The pathological progression of osteoarthritis (OA) involves degradation of articular cartilage matrix. Type II collagen is the main component of cartilage matrix, which is degraded by pro-inflammatory cytokines such as IL-1β mediated by MMP-13. Nebivolol, a licensed drug used for the treatment of hypertension in clinics, displays its anti-inflammatory capacity in various conditions. However, whether Nebivolol has a protective effect on cartilage matrix degradation has not been reported before. In this study, we investigated the effects of Nebivolol on regulating the expression of MMP-13 and degradation of type II collagen. Our results indicate that Nebivolol alleviated the increase in gene expression, protein expression, and activity of MMP-13 induced by IL-1β. Importantly, IL-1β strikingly reduced the levels of type II collagen in cell culture supernatants, which was reversed by treatment with Nebivolol in a dose-dependent manner. Mechanistically, Nebivolol was found to alleviate the increased levels of phosphorylated IκBα and reduced levels of total IκBα induced by IL-1β, which subsequently mitigated p65 nuclear translocation and the transcriptional activity of NF-κB. Furthermore, our results indicated that IL-1β treatment r...Continue Reading

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Methods Mentioned

BETA
PCR
electrophoresis
nuclear translocation
transfection

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