Study on the potentiation effect of Puerariae Lobatue Radix and Acori Tatarinowii Rhizoma on PNS in the improvement of blood-brain barrier damage in MCAO rats based on the opening and closing of sweat pores
Objective To observe the neuroprotective effect of wind medicine(Puerariae Lobatue Radix and Acori Tatarinowii Rhizoma)in combination with Panax ginseng total saponin(PNS)on cerebral ischemia-reperfusion rats;To elucidate the mechanism of"wind medicine increasing effect".Methods Totally 140 male SD rats were divided into sham-operation group,model group,PNS group,Puerariae Lobatue Radix group,Acori Tatarinowii Rhizoma group,Puerariae Lobatue Radix+PNS group,Acori Tatarinowii Rhizoma+PNS group according to the random number table method,with 20 rats in each group.Except for the sham-operation group,the cerebral ischemia/reperfusion rat model was established using the modified Longa line bolus method in the remaining groups.After 7 d of administration of the appropriate pharmacologic intervention in each group,neurological dysfunction was evaluated by Zea-longa score after final administration,cerebral infarct volume was determined by TTC staining;blood brain barrier(BBB)permeability of brain tissue on the ischemic side was detected by Evans blue content;BBB ultrastructure of each group of rats was observed by transmission electron microscopy;Claudin 5 protein expression level was detected by immunohistochemistry;Zonula occludens-1(ZO-1),major facilitator supeffamily domain-containing protein 2a(Mfsd2a),Occludin,P-glycoprotein(P-gp),Monocarboxylate Transporters-1(MCT1)and breast cancer resistance protein(BCRP)protein expression levels were detected by Western-blot.Results Compared with the model group,the rat neurological function scores were reduced in each administration group(P＜0.05),infarct volume was reduced(P＜0.05),EB content of brain tissue decreased(P＜0.05),protein expressions of Claudin 5,ZO-1,Mfsd2a and Occludin in brain tissue were elevated(P＜0.05),the protein expressions of P-gp,BCRP and MCT1 were reduced(P＜0.05),and the protein expressions of Claudin 5,Mfsd2a,and Occludin was higher in the Puerariae Lobatue Radix+PNS group and Acori Tatarinowii Rhizoma+PNS group than that of each group of medication alone(P＜0.05),and the protein expression of MCT1 was lower than that of each group of medication alone(P＜0.05);the protein expression level of ZO-1 in the Puerariae Lobatue Radix+PNS group was higher than that of the group of medication alone(P＜0.05);P-gp protein expression was lower in Acori Tatarinowii Rhizoma+PNS group than in the PNS group and Acori Tatarinowii Rhizoma group(P＜0.05).Conclusion Wind medicine(Puerariae Lobatue Radix and Acori Tatarinowii Rhizoma)may potentiate the neuroprotective effect of PNS on cerebral ischemia-reperfusion rats,and the mechanism may be related to the protection of BBB structural integrity and maintenance of central barrier properties,while regulating substance transport proteins and increasing the intracerebral content of the drug.
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