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Abstract Title:

Diphlorethohydroxycamalol isolated from Ishige okamurae prevents HO-induced oxidative damage via BMP2/Runx2 signaling in osteoblastic MC3T3-E1 cells.

Abstract Source:

Fitoterapia. 2021 Jul ;152:104921. Epub 2021 May 11. PMID: 33984434

Abstract Author(s):

Seung-Hong Lee, Mihyang Kim, Mi Hwa Park

Article Affiliation:

Seung-Hong Lee

Abstract:

Accumulating evidence has shown an association between osteoporosis and oxidative damage. In the present study, the protective effects of diphlorethohydroxycarmalol (DPHC) isolated from the brown algae Ishige okamurae against HO-induced oxidative damage via bone morphogenetic protein 2 (BMP2)/ runt-related transcription factor 2 (Runx2) signaling were investigated using MC3T3-E1 osteoblastic cells. DPHC counteracted the reduction in cell viability caused by HOexposure and protected against HO-induced dysfunction, demonstrated by improved cellular alkaline phosphatase (ALP) activity and calcium deposition. In addition, treatment with 0.05-0.2 mM DPHC elevated the protein expression of osteoblast differentiation factors type 1 collagen, ALP, p-Smad1/5, Osterix, BMP2, and Runx2, in response to HO-induced oxidative damage. Importantly, DPHC decreased the expression levels of receptor activator of nuclear factor kappa-B ligand, which promotes bone resorption, and inhibited the HO-induced generation of reactive oxygen species. Taken together, the results suggest that DPHC counteracts the effects of oxidative stress in osteoblastic cells and has the potential to be effective in preventing and alleviating osteoporosis.

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