中国药理学通报
中國藥理學通報
중국약이학통보
CHINESE PHARMACOLOGICAL BULLETIN
2014年
7期
921-925
,共5页
朱娜%冯利杰%王海萍%沈玉君%沈玉先
硃娜%馮利傑%王海萍%瀋玉君%瀋玉先
주나%풍리걸%왕해평%침옥군%침옥선
α1 抗胰蛋白酶 Z 型突变体%自噬%p62%LC3%Bec-lin1%细胞毒性
α1 抗胰蛋白酶 Z 型突變體%自噬%p62%LC3%Bec-lin1%細胞毒性
α1 항이단백매 Z 형돌변체%자서%p62%LC3%Bec-lin1%세포독성
α1-antitrypsin Z variant%autophagy%p62%LC3%Beclin1%cytotoxicity
目的:观察α1抗胰蛋白酶(α1-antitrypsin,AAT)Z型突变体(α1-antitrypsin Z variant,ATZ)表达对细胞自噬水平的影响,探讨ATZ细胞毒作用的可能机制。方法体外培养人胚肾细胞株HEK 293T并转染ATZ真核表达质粒,利用Western blot法检测自噬相关蛋白LC3和p62的表达,免疫荧光染色观察LC3的细胞定位,real-time PCR法检测自噬相关基因Atg5、Atg12和Beclin1的变化,DAB染色观察ATZ过表达对细胞形态的影响。结果与转染空质粒对照组相比,
目的:觀察α1抗胰蛋白酶(α1-antitrypsin,AAT)Z型突變體(α1-antitrypsin Z variant,ATZ)錶達對細胞自噬水平的影響,探討ATZ細胞毒作用的可能機製。方法體外培養人胚腎細胞株HEK 293T併轉染ATZ真覈錶達質粒,利用Western blot法檢測自噬相關蛋白LC3和p62的錶達,免疫熒光染色觀察LC3的細胞定位,real-time PCR法檢測自噬相關基因Atg5、Atg12和Beclin1的變化,DAB染色觀察ATZ過錶達對細胞形態的影響。結果與轉染空質粒對照組相比,
목적:관찰α1항이단백매(α1-antitrypsin,AAT)Z형돌변체(α1-antitrypsin Z variant,ATZ)표체대세포자서수평적영향,탐토ATZ세포독작용적가능궤제。방법체외배양인배신세포주HEK 293T병전염ATZ진핵표체질립,이용Western blot법검측자서상관단백LC3화p62적표체,면역형광염색관찰LC3적세포정위,real-time PCR법검측자서상관기인Atg5、Atg12화Beclin1적변화,DAB염색관찰ATZ과표체대세포형태적영향。결과여전염공질립대조조상비,
Aim To investigate the effect of α1-anti-trypsin Z variant (ATZ)overexpression on cell autoph-agy.Methods HEK 293T cells were transfected with pcDNA3.1 zeo+/ATM or pcDNA3.1 zeo+/ATZ,e-qual amount of empty vector was used as control.Cells were treated with NH4Cl for 4 hours and processed for detecting ATZ,LC3 and p62 by immunoblot.Mean-while ,expression and intracellular localization of ATZ, LC3 in 293 T cells were observed with double labeled immunofluorescence.The mRNA levels of autophagy-related genes were measured by real-time PCR.Immu-nohistochemistry was used to observe the morphology of ATZ-positive cells.Results Compared with the control,higher LC3Ⅱ levels and LC3 puncta were observed in ATZ transfected cells.Meanwhile,the levelsof p62 were decreased in ATZ transfected cells,andreversed by NH4 Cl (25 mmol·L -1 )treatment.Overexpression of ATZ increased the mRNA levels of Atg5and Atg12,but had no obvious influence on Beclin1.ATZoverexpressing cells presented abnormal morphologies.The nuclei became reduced,condensed,and even disappeared in ATZpositive cells.Conclusion ATZ overexpression increases autophagy activity whichmay be related to increasing Atg5 and Atg12 levels.