摘要
目的:研究蒺藜皂苷(GSTT)对氰化钠(NaCN)诱导大鼠乳鼠心肌细胞缺氧时心肌细胞内蛋白激酶C含量的影响。方法:利用培养的Wistar大鼠乳鼠心肌细胞,采用NaCN建立心肌细胞内缺氧模型,100 mg.L-1GSTT组和30 mg.L-1GSTT组干预12 h后,应用激光共聚焦显微镜系统和流式细胞术定性定量研究心肌细胞内δPKC和εPKC的分布及含量。结果:GSTT能明显促进εPKC和δPKC从细胞浆向细胞膜的转位,100 mg.L-1GSTT组激光聚焦显微镜系统及流式细胞术测定的荧光定量心肌细胞内εPKC及δPKC(1 325.00±53.25、810.55±36.89;66.22±6.23、40.12±2.21)与模型组(792.00±32.36、492.40±30.15;32.70±2.78、29.28±4.82)比较,差异具有显著性(P<0.001,P<0.01;P<0.001,P<0.01),GSTT明显增加δPKC和εPKC表达,100 mg.L-1GSTT组δPKC和εPKC含量(1 325.00±53.25、810.55±36.89;66.22±6.23、40.12±2.21)高于30 mg.L-1GSTT组(998.00±23.21、710.00±38.12;55.35±5.15、35.68±3.89),两组比较,差异具有显著性(P<0.01,P<0.05;P<0.01,P<0.05)。结论:GSTT可能通过激活PKC以保护受损心肌细胞。
Objective To study the protective mechanism of Gross Saponin Tribulus Terrestris (GSTT) on the neonatal rat ventrieular eardioeytes injured by hypoxia and the effect on protein kinase C (PKC). Methods The hypoxia-ischemia model was performed by treating the cultured neonatal rat ventricular cardiocytes with NaCN. The effect of GSTT (100 and 30 mg · L^-1 ) on the contents of εPKC and δPKC were detected by flow eytometry and laser confocal microscopy system. Results GSTT up-regulated εPKC and δPKC expressions. The contents of εPKC and δPKC in GSTT 100mg · L^-1 group (1 325.00±53.25, 810. 55±36.89; 66.22±6.23, 40.12±2. 21) were increased significantly than those in model group (792.00±32.36, 492.40±30.15; 32.70±2.78, 29. 28±4.82) (P〈0. 001, P〈0.01; P〈0. 001, P〈0. 01), and were higher than those in GSTT 30mg · L^-1 group (998. 00± 23.21,710.00± 38.12 ; 55.35±5.15, 35.68±3.89) (P〈0.01, P〈0.05; P〈0.01, P〈0.05). Conclusion GSTT can protect cardiocytes through activating PKC signaling pathway.
出处
《吉林大学学报(医学版)》
CAS
CSCD
北大核心
2006年第2期214-217,共4页
Journal of Jilin University:Medicine Edition
基金
国家自然科学基金资助项目(30472020)
关键词
蒺藜皂苷
蛋白激酶C
激光聚焦显微镜
流式细胞术
Gross Saponin Tribulus Terrestris
protein kinase C
laser confocal microscopy
flow cytometry
作者简介
孙巍(1978-),男,吉林省长春市人,医学博士,主要从事心血管药理学研究。
通讯作者(Tel:0431—5619483;E-mail:jcyaoli@sina.com)