慢性脑缺血大鼠OXR表达的实验分析Study on the OXR expression of chronic cerebral ischemia in rats
吕斌,娄季宇,张萍,李文杰
摘要(Abstract):
目的探讨慢性脑缺血时食欲素受体(OXR)的表达。方法通过结扎双侧颈总动脉(2VO)建立脑缺血模型,免疫组化测定OXR表达。结果慢性脑缺血是OX1R及OX2R出现了一致的表达变化,即缺血15d时二者表达均明显增加,1个月时下降,2个月时再次升高。缺血1个月时大部分神经细胞萎缩,而2个月时部分细胞恢复正常。结论提示缺血的早期OXR可能有诱导细胞凋亡的作用,而缺血的后期OXR可能有神经保护作用。
关键词(KeyWords): 慢性脑缺血;大鼠;OREXIN;OXR表达
基金项目(Foundation):
作者(Author): 吕斌,娄季宇,张萍,李文杰
参考文献(References):
- [1]OhtaH.NishikawaH.KimuraH,et al.Chronic cerebral hy-poperfusion by permanent internal carotid ligation produceslearning impairment without brain damage in rats[J].Neuro-science,1997,79(4):1039-1050.
- [2]Irving EA,Harrison DC,Babbs AJ,et al.Increased corticalexpression of the orexin-1receptor following permanent middlecerebral artery occlusion in the rat[J].Neurosci Lett,2002,324:53-56.
- [3]Smart D,Jerman J.The physiology and pharmacology of theorexins[J].Pharmacol Ther,2002,94:51-61.
- [4]Taylor MM,Samson WK.The other side of the Orexins:en-docrine and metabolic actions[J].Am J Physiol EndocrinolMetab,2003,284:E13-17.
- [5]Ray SK,Fidan M,Nowak MW,et al.Oxidativestressand Ca2+influx and upregulate calpain and induce apoptosis in PC12cells[J].Brain Res,2000,852:326-334.
- [6]Neves SR,Ram PT,Iyengar R.G Protein pathways[J].Sci-ence,2002,296:1636-1639.
- [7]Voisin T,El Firar,Avondo V,et al.Orexin-induced apoptosis:the key role of the seven transmembran domain orexin type2receptor[J].Endocrinology,2006,7:1-32.
- [8]Katsuki,Hiroshi,Akaike,et al.Quinolinic acid toxicity on ore-xin neurons blocked by gamma aminobutyric acid type A recep-tor stimulation[J].Lippincott Williams&Wilkins,Inc,2005,16(11):1157-1161.