Polyoxypregnane glycoside from Dregea volubilis extract inhibits IL-1β-induced expression of matrix metalloproteinase via activation of NF-κB in human chondrocytes
| Autor: | Prachya Kongtawelert, Saksri Sanyacharernkul, Peraphan Pothacharoen, Thanyaluck Phitak, Wilart Pompimon, Akanit Itthiarbha |
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| Rok vydání: | 2011 |
| Předmět: |
Swine
Interleukin-1beta Type II collagen IκB kinase Matrix metalloproteinase Chondrocyte Chondrocytes medicine Animals Humans Glycosides Phosphorylation Collagen Type II Cells Cultured Mitogen-Activated Protein Kinase Kinases Plant Extracts Chemistry Kinase NF-kappa B Cell Biology General Medicine Saponins Matrix Metalloproteinases Cell biology Apocynaceae IκBα medicine.anatomical_structure Gene Expression Regulation Biochemistry sense organs Signal transduction Signal Transduction Developmental Biology |
| Zdroj: | In Vitro Cellular & Developmental Biology - Animal. 48:43-53 |
| ISSN: | 1543-706X 1071-2690 |
| Popis: | Interleukin-1β (IL-1β) induces the expression of matrix metalloproteinases (MMPs) implicated in cartilage and joint degradation in osteoarthritis (OA) and rheumatoid arthritis (RA). Polyoxypregnane glycoside (PPG), active compound was identified from Dregea volubilis extract by chemical analysis, shown to exert chondroprotective effects in cartilage explant models. However, no studies have been undertaken for the molecular investigation of whether PPG constituents protect the human articular chondrocyte (HAC). In the present studies, HAC was co-treated with IL-1β and PPG. The expression of MMPs, type II collagen, phosphorylation of mitogen-activated protein kinases (MAPKs) and NF-κB signaling pathway were determined by Western immunoblotting. PPG (6.25-25 μM) decreased the IL-1β-induced HA release from chondrocyte to culture medium. The mode of action of PPG was likely mediated through inhibiting expression of MMP-1, -3 and -13 in the medium, which was associated with the inhibition of mRNA expression. PPG had no effect on IL-1β-induced phosphorylation of MAPK pathway. Conversely, PPG decreased phosphorylation of IκB kinase and IκBα degradation. Taken together, these results indicate that PPG may inhibit cartilage degradation in OA and may also be used as nutritional supplement for maintaining joint integrity and function. |
| Databáze: | OpenAIRE |
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