Expressions of Caveolin-1 and Transforming growth factor betal 1 in A549 cells exposed to hyperoxia and their relationship
10.3760/cma.j.issn.2095-428X.2013.04.022
- VernacularTitle:高体积分数氧暴露下A549细胞中小窝蛋白-1与转化生长因子-β1的表达及其相互关系
- Author:
Jia-Wen DANG
1
;
Wen-Bin DONG
;
Qing-Ping LI
;
Xiao-Ping LEI
;
Xue-Song ZHAI
;
Feng CHEN
Author Information
1. 646000,泸州医学院附属医院新生儿科
- Keywords:
Hyperoxia;
Lung injury;
A549;
Caveolin-1;
Transforming growth factor-β1
- From:
Chinese Journal of Applied Clinical Pediatrics
2013;28(4):308-310
- CountryChina
- Language:Chinese
-
Abstract:
Objective To observe the expressions of Caveolin-1 (CAV-1) and transforming growth factor bata 1 (TGF-β1) in human adenocarcinoma of lung A549 cells exposed to hyperoxia,and to explore the changes in CAV-1 and TGF-β1 expressions and the role in hyperoxic lung injury.Methods After the A549 human lung cancer cell lines were resuscitated,the cells were packaged and cultured in 50 mL/L CO2 culture chamber,when approaching to the condition of confluence in CO2 culture chamber(37 ℃,50 mL/L CO2),the cells were randomly divided into control group and hyperoxia group.Eighteen bottles of A549 cells in each group.The hyperoxia group received attacking factor that was mixed with oxygen (950 mL/L)and CO2 (50 mL/L) at a velocity of 3 L/min for 10 min;then the flasks were enclosed and cultured in culture chamber,while those in control group were still exposed to 5 mL/L CO2.After cells were cultured for 12 h,24 h,48 h,the changes in morphology were observed under the inverted microscope,the expressions CAV-1 and TGF-β1 were detected by double immunofluorescence staining technique,followed by laser scanning under the focus microscope.Results In the control group,there was high expression of CAV-1 associated with low expression of TGF-β1 (44.25 ± 3.23,10.18 ± 2.74).Compared with control group,the content of CAV-1 reduced continuously (12 h:35.25 ± 1.88,24 h:20.75 ± 1.68,48 h:9.86 ± 2.80) under prolonged hyperoxia exposure,but TGF-β1 increased gradually(12 h:17.32 ± 1.50,24 h:26.51 ± 1.82,48 h:41.94 ±4.47),and the expression of CAV-1 had highly negative relation to TGF-β1 at the same time (r =-0.91,-0.62,-0.53,-0.88,all P ＜ O.05) in the control group and the hyperoxia group in 12 h,24 h,48 h.Conclusions The reduction of CAV-1 expression can attenuate the inhibitory effect of TGF-β1 and activate TGF-β1 signaling pathway,which may result in hyperoxic lung injury.
