Protective effect of <em>Astragalus membranaceus</em> on intestinal mucosa reperfusion injury after hemorrhagic shock in rats

Zi-Qing Hei, Jing-Jun Zhang, Bing-Xue Chen, Xiao-Yun Li, Department of Anesthesiology, Third Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510080, Guangdong Province, China

He-Qing Huang, School of Pharmaceutical Sciences of Sun Yat-Sen University, Guangzhou 510080, Guangdong Province, China

Author contributions: All authors contributed equally to the work.

Correspondence to: Dr. Zi-Qing Hei, Department of Anesthesiology, Third Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510630, Guangdong Province, China. moc.anis@gniqizieh

Telephone:+86-20-85516867-3132

Zi-Qing Hei, Jing-Jun Zhang, Bing-Xue Chen, Xiao-Yun Li, Department of Anesthesiology, Third Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510080, Guangdong Province, China

He-Qing Huang, School of Pharmaceutical Sciences of Sun Yat-Sen University, Guangzhou 510080, Guangdong Province, China

Author contributions: All authors contributed equally to the work.

Correspondence to: Dr. Zi-Qing Hei, Department of Anesthesiology, Third Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510630, Guangdong Province, China. moc.anis@gniqizieh

Telephone:+86-20-85516867-3132

Received 2004 Oct 29; Revised 2005 Jan 8; Accepted 2005 Jan 12.

Abstract

AIM: To study the protective effect of Astragalus membranaceus on intestinal mucosa reperfusion injury and its mechanism after hemorrhagic shock in rats.

METHODS: A total of 32 SD rats were randomly divided into four groups (n = 8, each group): normal group, model group, low dosage group (treated with 10 g/kg Astragalus membranaceus) and high dosage group (treated with 20 g/kg Astragalus membranaceus). The model of hemorrhagic shock for 60 min and reperfusion for 90 min was established. Therapeutic solution (3 mL) was administrated before reperfusion. At the end of the study, the observed intestinal pathology was analyzed. The blood concentrations of lactic acid (LD), nitric oxide (NO), endothelin-1 (ET-1), malondialdehyde (MDA) and the activity of superoxide dismutase (SOD), glutathione peroxidase (GSH-PX) in intestinal mucosa were determined.

RESULTS: The intestinal mucosa pathology showed severe damage in model group and low dosage group, slight damage in high dosage group and no obvious damage in normal group. The Chiu’s score in low dose group and high dose group was significantly lower than that in model group. The content of MDA in model group was higher than that in low and high dose groups, while that in high dose group was almost the same as in normal group. The activity of SOD and GSH-PX was the lowest in model group and significantly higher in high dose group than in normal and low dose groups. The concentrations of LD and ET-1 in model group were the highest. The concentrations of NO in model group and low dose group were significantly lower than those in high dose group and normal group.

CONCLUSION: High dose Astragalus membranaeus has much better protective effect on hemorrhagic shock-reperfusion injury of intestinal mucosa than low dose Astragalus membranaceus. The mechanism may be that Astragalus membranaceus can improve antioxidative effect and regulate NO/ET level during hemorrhagic reperfusion.

Keywords: Hemorrhage shock, Intestinal reperfusion injury, Astragalus membranaceus

Abstract

Footnotes

Supported by the Chinese Traditional Medicine Foundation of Guangdong Province, China, No. 102061

Science Editor Wang XL and Guo SY Language Editor Elsevier HK

Footnotes

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