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Int. J. Mol. Sci. 2012, 13(2), 1747-1761; doi:10.3390/ijms13021747
Article

Mitochondrial Protection and Anti-aging Activity of Astragalus Polysaccharides and Their Potential Mechanism

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Received: 31 December 2011; in revised form: 21 January 2012 / Accepted: 29 January 2012 / Published: 7 February 2012
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Abstract: The current study was performed to investigate mitochondrial protection and anti-aging activity of Astragalus polysaccharides (APS) and the potential underlying mechanism. Lipid peroxidation of liver and brain mitochondria was induced by Fe2+–Vit C in vitro. Thiobarbituric acid (TBA) colorimetry was used to measure the content of thiobarbituric acid reactive substances (TBARS). Mouse liver mitochondrial permeability transition (PT) was induced by calcium overload in vitro and spectrophotometry was used to measure it. The scavenging activities of APS on superoxide anion (O2•-) and hydroxyl radical (•OH), which were produced by reduced nicotinamide adenine dinucleotide (NADH)—N-Methylphenazonium methyl sulfate (PMS) and hydrogen peroxide (H2O2)–Fe2+ system respectively, were measured by 4-nitrobluetetrazolium chloride (NBT) reduction and Fenton reaction colorimetry respectively. The Na2S2O3 titration method was used to measure the scavenging activities of APS on H2O2. APS could inhibit TBARS production, protect mitochondria from PT, and scavenge O2•-, •OH and H2O2 significantly in a concentration-dependent manner respectively. The back of the neck of mice was injected subcutaneously with D-galactose to induce aging at a dose of 100 mg/kg/d for seven weeks. Moreover, the activities of catalase (CAT), surperoxide dismutase (SOD) and glutathione peroxidase (GPx) and anti-hydroxyl radical which were assayed by using commercial monitoring kits were increased significantly in vivo by APS. According to this research, APS protects mitochondria by scavenging reactive oxygen species (ROS), inhibiting mitochondrial PT and increasing the activities of antioxidases. Therefore, APS has the effect of promoting health.
Keywords: Astragalus polysaccharides; mitochondria; anti-aging; antioxidant; reactive oxygen species; mitochondrial permeability transition Astragalus polysaccharides; mitochondria; anti-aging; antioxidant; reactive oxygen species; mitochondrial permeability transition
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Li, X.-T.; Zhang, Y.-K.; Kuang, H.-X.; Jin, F.-X.; Liu, D.-W.; Gao, M.-B.; Liu, Z.; Xin, X.-J. Mitochondrial Protection and Anti-aging Activity of Astragalus Polysaccharides and Their Potential Mechanism. Int. J. Mol. Sci. 2012, 13, 1747-1761.

AMA Style

Li X-T, Zhang Y-K, Kuang H-X, Jin F-X, Liu D-W, Gao M-B, Liu Z, Xin X-J. Mitochondrial Protection and Anti-aging Activity of Astragalus Polysaccharides and Their Potential Mechanism. International Journal of Molecular Sciences. 2012; 13(2):1747-1761.

Chicago/Turabian Style

Li, Xing-Tai; Zhang, Ya-Kui; Kuang, Hai-Xue; Jin, Feng-Xin; Liu, De-Wen; Gao, Ming-Bo; Liu, Ze; Xin, Xiao-Juan. 2012. "Mitochondrial Protection and Anti-aging Activity of Astragalus Polysaccharides and Their Potential Mechanism." Int. J. Mol. Sci. 13, no. 2: 1747-1761.



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