摘要
目的 探讨小豆蔻明对蛛网膜下腔出血迟发性脑血管痉挛(DCVS)的作用机制.方法 颈内动脉刺破法制作大鼠蛛网膜下腔出血迟发性脑血管痉挛模型,在造模后第1~7天,每天给予小豆蔻明(7.5 mg/kg)腹腔注射,对照组注入等量生理盐水.Image pro-plus软件测量苏木素-伊红(HE)染色大鼠基底动脉管壁厚度,免疫组织化学法检测磷酸化蛋白激酶B (p-Akt),免疫荧光染色检测Akt通路下游增殖蛋白C-myc表达和α-平滑肌肌动蛋白(α-SMA)改变.原位缺口末端标记法(TUNEL)检测细胞凋亡情况.结果 药物治疗组p-Akt、C-myc表达(2.36±0.58、0.96±0.20)、内皮细胞和平滑肌细胞凋亡[(2.77 ±0.29)%]明显低于出血组[5.58±0.65、2.56±0.34、(5.45±0.56)%]和溶媒组大鼠[5.41±0.55、2.67±0.56、(5.53±0.40)%,P<0.05],而α-SMA表达量(0.23±0.02)高于出血组(0.14±0.02)和溶媒组(0.15 ±0.02,P <0.05).结论 小豆蔻明可能通过抑制Akt通路下调C-myc表达,并促进α-SMA表达而影响平滑肌表型转换和增殖,同时能减少内皮细胞和平滑肌细胞凋亡,从而缓解蛛网膜下腔出血所致DCVS.
Objective Exploration the mechanism of Cardmonin treats delayed cerebral vasospasm after subarachnoid hemorrhage (SAH).Methods Internal carotid artery puncture SAH model in rats,Cardmonin (7.5 mg/kg) intraperitoneal injection per day from 1 day to 7 days after surgery,control group injected amount of saline solution.hematoxylin and eosin (HE) staining calculates the wall thickness of basilar atrery,immunohistochemical detection of phosphorylated protein kinase B (p-Akt) and alpha smooth muscle actin (α-SMA) content,immunofluorescence staining detects C-myc expression and alpha actin quantity change.TdT-mediated dUTP nick end labeling (TUNEL) staining detects apoptosis.Results Drug treatment group:p-Akt,C-myc expression and apoptosis [(2.36 ± 0.58,0.96 ± 0.20,(2.77 ± 0.29) %] significantly lower than the amount of SAH [5.58 ± 0.65,2.56 ± 0.34,(5.45 ± 0.56) %] and solvent group [5.41 ± 0.55,2.67 ± 0.56,(5.53 ± 0.40) %,P 〈 0.05],while α-SMA expression quantity is the drug treatment group (0.23 ±0.02) higher than the hemorrhage group (0.14 ± 0.02) and solvent (0.15 ± 0.02,P 〈 0.01).Conclusion Cardmonin alleviates cerebral vasospasm after SAH may affects the smooth muscle phenotype switching and proliferation by inhibiting Akt pathway C-myc expression and apoptosis,increase of alpha smooth muscle actin expression.
出处
《中华实验外科杂志》
CAS
CSCD
北大核心
2015年第2期343-345,共3页
Chinese Journal of Experimental Surgery
基金
国家自然科学基金资助项目(81171116)
关键词
小豆蔻明
迟发性脑血管痉挛
表型转换
增殖
凋亡
Cardmonin
Delayed cerebral vascular vasospasm
Phenotype switching
Proliferation
Apoptosis