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骨髓间充质干细胞对氧化应激下肺泡上皮细胞凋亡的调控作用及其机制 被引量:3

Modulatory effects of bone marrow mesenchymal stem cells on apoptosis of alveolar epithelial cells under oxidative stress
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摘要 目的探讨骨髓间充质干细胞(MSCs)与氧化应激状态下的肺泡上皮细胞共培养,对氧化应激水平的变化和分裂原活化蛋白激酶(MAPKs)通路的调控机制。方法分离培养大鼠MSCs,在Transwell小室中建立共培养体系,实验分3组为A549组、香烟烟雾提取物(CES)+A549组、CES十A549+MSCs共培养组。收集各组细胞和上清液,检测A549细胞凋亡率、丙二醛(MDA)、超氧化物歧化酶(SOD)的含量,c-JunN-末端激酶(JNK)、细胞外信号调节激酶(ERK)、p38蛋白激酶(p38)的表达及半胱氨酰天冬氨酸特异性蛋白酶.3(Caspase-3)的表达。结果CES+A549+MSCs组细胞凋亡率明显低于CES+A549组[(11.01±0.23)比(18.12±1.43),(P〈0.01)]。CES+A549+MSCs组MDA较CES+A549组明显降低[(0.512±0.132)比(1.450±0.073),(P〈0.01)1,而SOD明显增高[(12.224-0.12)比(7.21±0.31),(P〈0.01)]。A549+CSE+MSCs组P-p38、P—JNK、Caspase-3的表达明显低于A549+CSE组,分别为(1.55±0.13)比(3.41±0.01)、(3.24±0.21)比(7.22±0.25)、(2.29±0.15)比(5.27±0.17),P〈0.05,而P—ERK的表达明显增高[(1.21±0.03)比(0.22±0.02),P〈0.05]。结论MSCs可以通过抑制p-p38、p-JNK的表达,提高p-ERK的表达而降低氧化应激下的细胞凋亡,从而对细胞起保护作用。 Objective To explore the modulatory effects of bone marrow mesenchymal stem cells (MSCs) on changes in oxidative stress and mitogen-activated protein kinases (MAPKs) pathway by co-culturing of bone marrow MSCs with alveolar epithelial cells under oxidative stress. Methods MSCs in rats were separated and cultured, the the co-culture system was established in Transwell small chamber. Three groups were designed : A549 group, CES + A549 group, and CES + A549 + MSCs group. The cells and the supernatant in three groups were harvested for detection of apoptosis rate of A549 epithelial cells, the con- tents of malondialdehyde (MDA) and superoxide dismutase (SOD), and the expression of p-C-Jun N-ter- minal kinase (p-JNK), p-extracellular signal-regulated kinase (p-ERK) , p-p38 and Caspase-3. Results The apoptosis rate in CES + A549 + MSCs group was significantly lower than in CES + A549 group [ ( 11. 01 ±0. 23) vs. ( 18. 12±1.43), (P 〈0. 01 ). The MDA content in CES + A549 + MSCs group was reduced significantly as compared with CES + A549 group [ (0. 512 ± 0. 132) vs. (1. 450 ±0. 073 ), (P 〈 0. 01 ) ], and the SOD content was higher than in CES + A549 group [ ( 12. 22± 0. 12) vs. (7.21 ± 0. 31 ), (P 〈 0. 01 ) ]. The expression of p-p38, p-JNK and Caspase-3 in A549 + CSE + MSCs group was significantly lower than in A549 + CSE group [ p-p38 : ( 1.55±0. 13 ) vs. ( 3.41± 0. O1 ) ; p-JNK : ( 3.24 ±0. 21 ) vs. (7.22 ± 0. 25 ) ; Caspase-3 : [ ( 2. 29±0. 15 ) vs. (5.27 ± 0. 17 ), P 〈 0. 05 ], and the expression of p-ERK was significantly higher than in 3.549 + CSE group [ ( 1.21 ± 0. 03 ) vs. (0. 22 ± 0. 02), P 〈 0. 05 ]. Conclusion MSCs can exert the protective effects on alveolar epithelial cells under oxidative stress by reducing apoptosis through inhibiting the expression of p-p38 and p-JNK, and increasing the expression of p-ERK.
出处 《中华实验外科杂志》 CAS CSCD 北大核心 2012年第9期1796-1798,共3页 Chinese Journal of Experimental Surgery
基金 河南省医学科技重大攻关计划资助项目(200902012):河南省科技攻关计划资助项目(102300410247)
关键词 骨髓间充质干细胞 氧化应激 脱噬作用 Bone marrow mesenchymal stem cells Oxidative stress Apoptosis
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