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초록

Curcumin, a natural bioactive compound, is known to exert therapeutic effects on cancer and dysplasia. However, less is known of its effects on DNA damage and repair in obesity. Therefore, this study was to examine the novel role of curcumin in regulating DNA repair signaling using a high-fat diet (HFD)-induced obesity in mice. Male C57BL/6 mice were fed either a 60% of HFD or standard chow with curcumin (2.5g/kg diet) for eight weeks. We observed that curcumin alleviated weight gain, preserved glucose balance, and enhanced liver fat accumulation and lipid profile in mice with obesity induced by a HFD. Curcumin enhanced the adipocyte-derived mesenchymal stem cell (ADMSC) population (Sca-1+CD45-) and expression of phosphorylated checkpoint kinase1 (pCHK1), a DNA repair gene, in adipocytes isolated from adipose tissues of HFD-induced obesity in mice. Moreover, in human preadipocytes, treatment with 10 μM curcumin effectively reduced the mRNA levels of IL6 and CCL2 in a dose-dependent manner, while treatment with 100 μM H2O2 together with curcumin upregulated the levels of pCHK2 and total CHK2 protein and reduced level of 3H2AX, a biomarker of DNA damage. In addition, curcumin inhibits preadipocyte-to-adipocyte differentiation. In conclusion, our data demonstrated that curcumin reduced the pro-inflammatory response and DNA damage in adipocytes, controlling weight gain in mice with HFD-induced obesity. © The Author(s), 2025.

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