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• W3105683325 abstract "Abstract Herbal medicines are attractive agents for human care. In this study, we found that the alcohol extract of Ajuga taiwanensis (ATE) screened from a chemical bank exhibited potent capacity for suppressing senescence associated biomarkers, including SA-β-gal and up-regulated p53 in old human dermal fibroblasts (HDFs) without induction of significant cytotoxicity up to 100 µg/ml. Concomitantly, cells re-entered the cell cycle by reducing G1 phase arrest and increasing cell growth rate. The ATE was further partitioned to obtain the sub-fractions of n -butanol (BuOH), ethyl acetate (EA) and water. The BuOH and water sub-fractions exhibited less effects on prohibition of cell growth than the EA sub-fraction. All of these sub-fractions exhibited the ability on suppressing SA-β-gal and p53 of old HDFs as low as 5–10 µg/ml. Under the activity guided fractionation and isolation, a major active constituent named AT-1 was isolated. The AT-1 was further identified as 8- O -acetylharpagide by structural analysis, and it could suppress SA-β-gal and p53 of old HDFs below 10 µM. In addition, the intracellular reactive oxygen species (ROS) levels of old HDFs were suppressed by ATE, the sub-fractions of BuOH and water, and AT-1. However, the EA sub-fraction showed little ability on suppression of ROS. Furthermore, we performed an in vivo study using aging mice to be fed with ATE and the sub-fractions followed by immunohistochemical (IHC) staining. The expression of p53 and SA-β-gal was significantly reduced in several tissue sections, including skin, liver, kidney, and spleen. Taken together, current data demonstrated that A. taiwanensis could suppress cellular senescence in HDFs, and might be used for health care." @default.
• W3105683325 created "2020-11-23" @default.
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• W3105683325 date "2020-11-12" @default.
• W3105683325 modified "2023-09-24" @default.
• W3105683325 title "Involvement of 8-O-acetylharpagide for Ajuga taiwanensis mediated suppression of senescent phenotypes in human dermal fibroblasts" @default.
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• W3105683325 doi "https://doi.org/10.1038/s41598-020-76797-6" @default.
• W3105683325 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7661503" @default.
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• W3105683325 hasPublicationYear "2020" @default.
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