青光安颗粒剂含药血清对RGC5细胞损伤模型线粒体自噬及相关蛋白的影响  

Effects of Serum Containing Qingguang’an Granule on Mitochondrial Autophagy and Related Proteins in RGC5 Cell Injury Model

作　　者：刘倩宏 陈立浩 时健 朱冰瑶 曾令聪 姚小磊[1,2,3] LIU Qianhong;CHEN Lihao;SHI Jian;ZHU Bingyao;ZENG Lingcong;YAO Xiaolei(Hunan University of Chinese Medicine,Changsha,Hunan 410208,China;Key Laboratory of Hunan Province for Prevention and Treatment of Eye,Ear,Nose and Throat Diseases with Traditional Chinese Medicine,Changsha,Hunan 410208,China;The First Affiliated Hospital of Hunan University of Chinese Medicine,Changsha,Hunan 410007,China)

机构地区：[1]湖南中医药大学,湖南长沙410208 [2]中医药防治眼耳鼻咽喉疾病湖南省重点实验室,湖南长沙410208 [3]湖南中医药大学第一附属医院,湖南长沙410007

出　　处：《湖南中医药大学学报》2021年第10期1517-1522,共6页Journal of Hunan University of Chinese Medicine

基　　金：国家自然科学基金地区基金项目(81860870);第64批中国博士后科学基金面上资助一等资助项目(2018M640754);全国中医药创新骨干人才培训项目(湘中医药函2019:67号);湖南省高层次卫生人才“225”工程培养项目(湘卫函2019:196号)。

摘　　要：目的观察青光安颗粒剂含药血清对视网膜神经节细胞-5(retinal ganglion cells-5,RGC-5)损伤模型中线粒体自噬和相关蛋白的影响。方法将14只大鼠随机分为空白对照组(3只)和青光安组(11只)。青光安组灌胃青光安颗粒剂,空白对照组灌胃同等剂量的生理盐水,1次/d,灌胃7 d,第7天灌胃后提取含药血清和空白血清。培养RGC-5细胞,用谷氨酸毒性模拟青光眼所造成的神经细胞损伤,CCK8法筛选合适的含药血清和谷氨酸浓度。细胞分组为正常细胞组、空白血清组(谷氨酸+空白血清)、含药血清组(谷氨酸+含药血清)、3-甲基腺嘌呤(3-methyladenine,3-MA)+空白血清组(谷氨酸+3-MA+空白血清)、3-MA+含药血清组(谷氨酸+3-MA+含药血清组)。细胞培养24 h后,荧光共定位检测线粒体自噬发生情况;Western blot检测微管相关蛋白轻链3(microtubule associated protein light chain 3,LC3)中LC3-Ⅱ/LC3-I、溶酶体相关膜蛋白1(lysosome associated membrane protein1,LAMP1)蛋白的表达。结果通过CCK8结果筛选,确定谷氨酸最佳的作用浓度为20 mmol/L,空白血清和含药血清的作用浓度均为20%。与空白血清组相比,含药血清组、3-MA+空白血清组和3-MA+含药血清组的溶酶体含量显著降低(P<0.05)。与空白血清组相比,含药血清组、3-MA+空白血清组和3-MA+含药血清组中LAMP1和LC3-Ⅱ/LC3-I蛋白表达水平均显著降低(P<0.05);与3-MA+空白血清组相比,3-MA+含药血清组中LAMP1和LC3-Ⅱ/LC3-I蛋白表达水平水平显著降低(P<0.05)。结论青光安颗粒剂含药血清对青光眼损伤的保护作用可能通过抑制细胞的线粒体自噬,调控LAMP1和LC3-Ⅱ/LC3-I蛋白的表达,从而起到对RGCs的保护作用。Objective To observe the effect of serum containing Qingguang’an Granule on mitochondrial autophagy and related proteins in retinal ganglion cells-5(RGC-5)injury model.Methods 14 rats were randomly divided into blank control group(n=3)and Qingguang'an group(n=11).Qingguang'an group was given Qingguang'an Granule by intragastric administration,and the blank control group was given the same dose of normal saline once a day for 7 days.The drug-containing serum and blank serum were extracted after 7 days of intragastric administration.RGC-5 cells were cultivated,and glutamate toxicity was used to simulate nerve cell damage caused by glaucoma,CCK8 method was used to screen appropriate drug-containing serum and glutamate concentration.Cells were grouped into:normal cell group,blank serum group(glutamate+blank serum),drug-containing serum group(glutamate+drug-containing serum),3-methyladenine(3-MA)+blank serum group(glutamate+3-MA+blank serum),3-MA+drug-containing serum group(glutamic acid+3-MA+drug-containing serum).After the cells were cultured for 24 hours,fluorescence colocalization was used to detect the occurrence of mitochondrial autophagy;the expression levels of LC3-II/LC3-I and lysosome associated membrane protein 1(LAMP1)in microtubule associated protein light chain 3(LC3)were detected by Western blot.Results Through the screening of CCK8 results,it was determined that the optimal concentration of glutamic acid was 20 mmol/L,and the concentration of blank serum and drug-containing serum were both 20%.Compared with the blank serum group,the lysosome content of the drug-containing serum group,the 3-MA+blank serum group and the 3-MA+drug-containing serum group were significantly reduced(P<0.05).Compared with the blank serum group,the LAMP1 and LC3-II/LC3-I protein expression levels in the drug-containing serum group,3-MA+blank serum group and 3-MA+drug-containing serum group were significantly reduced(P<0.05).Compared with the 3-MA+blank serum group,the LAMP1 and LC3-II/LC3-I protein expression levels in the 3

关 键 词：青光眼 视网膜神经节细胞 青光安颗粒剂 谷氨酸 3-甲基腺嘌呤 微管相关蛋白轻链3 溶酶体相关膜蛋白1 

分 类 号：R285.5[医药卫生—中药学]