PMID: 19943491Dec 1, 2009Paper

Influence of scorpion alcoholic extraction on mdr1 mRNA and P-gp expression in brain of phenytoin-resistant convulsive rats

Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica
Xinfeng WangYi Xiao

Abstract

To study the anticonvulsive action of scorpion alcoholic extraction (SAE) on phenytoin-resistant convulsive rats made by direct cortical electrical stimulation in order to investigate the mechanism of antagonizing drug-resistance of SAE. Using the method of implanting microelectrodes in the cortical motor area of the brains of rats where the brain tissue was stimulated frequently by electricity through microelectrodes until igniting and then PHT (0.154 g x kg(-1) x d(-1)) ig for 7 days, We established phenytoin-resistant convulsive rat model. Total 6 groups were set up in the experiment: Normal control group, convulsion model control group (CMCG), phenytoin-resistant convulsion control group (PRCG), verapamil positive control group (VPCG, 0.0385 g x kg(-1)), scorpion alcohol extraction (SAE1, 6.5 g x kg(-1)) and scorpion alcohol extraction (SAE2, 13.0 g x kg(-1)). After ig both doses of SAE (6.5, 13.0 g x kg(-1)), the effects of SAE on the changes of convulsion threshold of phenytoin-resistant convulsive rats were observed. The method of RT-polymerase chain reaction (RT-PCR) was used to detect the changes of mdrl gene expression and the method of immunohistochemistry (SABC) was adopted to determine the changes of P-gp expressio...Continue Reading

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