Protective Mechanism of the Antioxidant Baicalein toward Hydroxyl Radical-Treated Bone Marrow-Derived Mesenchymal Stem Cells.
Protective Mechanism of the Antioxidant Baicalein toward Hydroxyl Radical-Treated Bone Marrow-Derived Mesenchymal Stem Cells.
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DOI:
10.3390/molecules23010223
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发表时间:
2018-01-20
期刊:
影响因子:
--
通讯作者:
Chen D
中科院分区:
文献类型:
--
作者:
Tian Y;Li X;Xie H;Wang X;Xie Y;Chen C;Chen D
Our study explores the antioxidant and cytoprotective effects of baicalein and further discusses the possible mechanisms. A methyl thiazolyl tetrazolium (MTT) assay revealed that baicalein could considerably enhance the viability of hydroxyl radical-treated bone marrow-mesenchymal stem cells (bmMSCs) at 37–370 µM. The highest viability rate was 120.4%. In subsequent studies, baicalein was observed to effectively scavenge hydroxyl radical and PTIO• radicals, reducing Fe3+ and Cu2+ ions. In the Fe2+-chelating UV-vis spectra, mixing of baicalein with Fe2+ yielded two evident redshifts (275 → 279 nm and 324 → 352 nm) and a broad absorption peak (λmax ≈ 650 nm, ε = 1.6 × 103 L mol−1·cm−1). Finally, we compared the Fe2+-chelating UV-vis spectra of baicalein and its analogues, including 5-hydroxyflavone, 6-hydroxyflavone, 7-hydroxyflavone, catechol, pyrogallol, and chrysin. This analysis revealed that the 4-keto group of the C-ring played a role. The 5,6,7-trihydroxy-group (pyrogallol group) in the A-ring served as an auxochrome, enhancing the absorbance of the UV-vis spectra and deepening the color of the Fe2+-complex. We concluded that baicalein, as an effective hydroxyl radical-scavenger, can protect bmMSCs from hydroxyl radical-mediated oxidative stress. Its hydroxyl radical-scavenging effects are likely exerted via two pathways: direct scavenging of hydroxyl radicals, possibly through electron transfer, and indirect inhibition of hydroxyl radical generation via Fe2+ chelation through the 4-keto-5,6,7-trihydroxy groups.
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影响因子:
2.4
作者:
Chen, Dong-Feng;Li, Xican;Hua, Zi-Chun
通讯作者:
Hua, Zi-Chun
影响因子:
1.7
作者:
Li, Xican;Han, Lu;Wei, Gang
通讯作者:
Wei, Gang
影响因子:
1.8
作者:
Li, Xican;Mai, Wenqiong;Chen, Dongfeng
通讯作者:
Chen, Dongfeng
影响因子:
3.3
作者:
Chen F;Liu Y;Wong NK;Xiao J;So KF
通讯作者:
So KF
DOI:
10.3390/molecules21091246
发表时间:
2016-09-19
期刊:
Molecules (Basel, Switzerland)
影响因子:
--
作者:
Li X;Jiang Q;Wang T;Liu J;Chen D
通讯作者:
Chen D