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Monotropein exerts protective effects against IL-1β-induced apoptosis and catabolic responses on osteoarthritis
Abstract:
Osteoarthritis, characterized by a loss of articular cartilage accompanied with inflammation, is the most common age-associated degenerative disease. Monotropein, an iridoids glycoside isolated from the roots of Morinda officinalis How, has been demonstrated to exhibit anti-inflammatory activity. In the present study, monotropein was firstly to exhibit cartilage protective activity by down regulating the pro-inflammatory cytokines in the knee synovial fluid in vivo. The anti-apoptotic and anti-catabolic effects of monotropein on rat OA chondrocytes treated by IL-1β were investigated in vitro. In cultured chondrocytes, monotropein attenuated apoptosis in a dose-dependent manner in response to IL-1β stimulation. Moreover, treatment with monotropein, the expressions of MMP-3 and MMP-13 were significantly decreased, the expression of COL2A1 was increased. Taken together, these findings suggested that monotropein exerted anti-apoptosis and anti-catabolic activity in chondrocytes, which might support its possible therapeutic role in OA.
Insights
Monotropein, derived from Morinda officinalis, protects cartilage by reducing inflammation and apoptosis in osteoarthritis (OA). This compound shows potential as a therapeutic agent for OA by preserving chondrocytes.
Area of Science:
- Biochemistry
- Pharmacology
- Orthopedics
Background:
- Osteoarthritis (OA) is a prevalent age-associated degenerative joint disease characterized by articular cartilage loss and inflammation.
- Monotropein, an iridoid glycoside from Morinda officinalis, possesses known anti-inflammatory properties.
- The potential cartilage-protective effects of monotropein in OA have not been fully elucidated.
Purpose of the Study:
- To investigate the cartilage protective activity of monotropein in an in vivo osteoarthritis model.
- To evaluate the in vitro anti-apoptotic and anti-catabolic effects of monotropein on rat OA chondrocytes stimulated with IL-1β.
Main Methods:
- In vivo assessment of monotropein's effect on pro-inflammatory cytokines in knee synovial fluid.
- In vitro study using cultured rat OA chondrocytes treated with IL-1β and varying doses of monotropein.
- Analysis of chondrocyte apoptosis, and the expression of matrix metalloproteinases (MMP-3, MMP-13) and collagen type II alpha 1 (COL2A1).
Main Results:
- Monotropein demonstrated cartilage protective activity in vivo by down-regulating pro-inflammatory cytokines.
- In vitro, monotropein significantly attenuated IL-1β-induced apoptosis in chondrocytes in a dose-dependent manner.
- Monotropein treatment led to decreased expression of MMP-3 and MMP-13, and increased expression of COL2A1 in chondrocytes.
Conclusions:
- Monotropein exhibits significant anti-apoptotic and anti-catabolic effects in chondrocytes.
- These findings suggest that monotropein may possess therapeutic potential for osteoarthritis treatment.
- Further research into monotropein's mechanisms and efficacy in OA is warranted.
