国际麻醉学与复苏杂志   2015, Issue (4): 7-7
    
线粒体通透性转换孔与心肌细胞缺氧/复氧过程中炎症反应关系的实验研究
薛富善, 廖旭, 程怡, 李瑞萍, 王世玉, 刘高谱, 杨桂珍, 孙超1()
1.中国医学科学院整形外科医院
The experiment on studying the relation between mitochondrial permeability transition pore and inflammatory response in myocardial cells during anoxia/reoxygenation
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摘要:

目的 探讨线粒体通透性转换孔(mitochondrial permeability transition pore, mPTP)功能状态与心肌细胞缺氧/复氧损伤过程中炎症反应的关系。 方法 心肌细胞培养72 h后,采用随机数字表法将其随机分为4组:空白对照组(Sham组)、缺氧/复氧损伤对照组(AR组)、mPTP开放抑制剂环孢素A(ciclosporin A, CSA)后处理组(CSA组)、mPTP开放剂苍术苷(atractyloside, ATR)后处理组(ATR组)。实验结束后检测各组心肌细胞乳酸脱氢酶(lactate dehydrogenase, LDH)漏出率、心肌细胞凋亡、线粒体膜电位的变化和心肌细胞核转录因子?蛳κB p65(nuclear factor-κB p65, NF-κB p65)与磷酸化核转录因子-κB p65 Ser536(p-NF-κB p65 Ser536)蛋白的表达量,并检测心肌细胞培养上清液白细胞介素-6(interleukin-6, IL-6)与肿瘤坏死因子-α(tumor necrosis factor-α, TNF-α)的浓度。 结果 与AR组比较,CSA组LDH漏出率显著降低[(27.2±2.6)%,(19.0±2.3)%](P<0.01),早期凋亡细胞百分比显著降低[(33.4±2.8)%,(15.4±2.3)%](P<0.01),p-NF-κB p65 Ser536蛋白表达量显著降低(5.1±0.7,4.4±0.4)(P<0.01),IL-6和TNF-α浓度均显著降低[IL-6 (190±10),(170±11) ng/L;TNF-α(129±9),(118±12) ng/L](P<0.01)。与AR组比较,ATR组LDH漏出率显著升高[(27.2±2.6)%,(32.1±3.6)%](P<0.01),早期凋亡细胞百分比显著升高[(33.4±2.8)%,(43.0±3.3)%](P<0.01),p-NF-κB p65 Ser536蛋白表达量显著升高(5.1±0.7,5.8±0.6)(P<0.01),IL-6和TNF-α浓度均显著升高[IL-6 (189±10),(205±9) ng/L; TNF-α(129±9),(144±10) ng/L](P<0.01)。 结论 mPTP开放状态能够通过调控心肌细胞缺氧/复氧过程中的炎症反应而显著影响缺氧/复氧心肌细胞损伤的程度。

关键词: 心肌细胞; 缺氧/复氧损伤; 线粒体通透性转换孔; 炎症反应
Abstract:

Objective To explore the relation between mitochondrial permeability transition pore (mPTP) and inflammatory response in myocardial cells during anoxia/reoxygenation. Methods Myocardial cells,cultured for 72 h were divided into 4 groups by a random number method: Sham group, anoxia/reoxygenation injury group (AR group), ciclosporin A(mPTP opening inhibitor) postconditioning group(CSA group), atractyloside(mPTP opening activator) postconditioning group(ATR group). After these treatments, lactate dehydrogenase (LDH) release rate, apoptosis, mitochondrial membrane potential were detected in myocardial cells of all groups, the protein levels of nuclear factor-κB p65(NF-κB p65) and phosphorylated NF-κB p65 Ser536 were also detected, the concentrations of interleukin-6(IL-6) and tumor necrosis factor-α (TNF-α) were assayed in myocardial cell culture supernatant fluids. Results Compared to the AR group, the LDH release rate[(27.2±2.6)% vs (19.0±2.3)%](P<0.01), early apoptosis[(33.4±2.8)% vs (15.4±2.3)%](P<0.01), phosphorylated NF-κB p65 Ser536 (5.1±0.7 vs 4.4±0.4)] (P<0.01) and the supernatant concentrations of TNF-α and IL-6 [IL-6 (190±10) ng/L vs (170±11) ng/L, TNF-α (129±9) ng/L vs (118±12) ng/L] (P<0.01) were significantly decreased in the CSA group. While in the ATR group, the LDH release rate[(27.2±2.6)% vs(32.1±3.6)%](P<0.01), early apoptosis[(33.4±2.8)% vs (43.0±3.3)%](P<0.01), phosphorylated NF-κB p65 Ser536 (5.1±0.7 vs 5.8±0.6)] (P<0.01) and the supernatant concentrations of TNF-α and IL-6 [IL-6(189±10) ng/L vs(205±9) ng/L, TNF-α (129±9) ng/L vs (144±10) ng/L](P<0.01) were higher than in the AR group. Conclusions mPTP opening can significant impact on the degree of myocardial cell injury during anoxia/reoxygenation by regulating the inflammatory response.

Key words: Myocardial cells; Anoxia/reoxygenation injury; Mitochondrial permeability transition pore; Inflammatory response