双调蛋白对小鼠呼吸机相关性肺损伤的保护作用及机制研究  

Protective effects of Amphiregulin on ventilator-associated lung injury in mice and its potential mechanisms

作　　者：蒙臣 王思露 钟政 王贤裕[1,2] 昌睿杰[1,2] MENG Chen;WANG Silu;ZHONG Zheng;WANG Xianyu;CHANG Ruijie(Department of Anesthesiology,Taihe Hospital,Shiyan,Hubei 442000,China;Institute of Anesthesiology,Hubei University of Medicine,Shiyan,Hubei 442000,China)

机构地区：[1]十堰市太和医院麻醉科,湖北十堰442000 [2]湖北医药学院麻醉学研究所,湖北十堰442000

出　　处：《安徽医药》2019年第6期1082-1087,共6页Anhui Medical and Pharmaceutical Journal

基　　金：湖北省科技计划项目(2017CFB387)

摘　　要：目的研究上皮生长因子双调蛋白(Amphiregulin,Areg)对呼吸机相关性肺损伤(ventilator-associated lung injury,VALI)肺组织的保护作用,并探讨其作用机制。方法将C57BL/6小鼠根据随机数字表法随机分为8组:①对照组(Control组),每只腹腔注射磷酸盐缓冲液(PBS) 200μL,维持正常呼吸;②Areg组,腹腔注射重组小鼠Areg蛋白(rmAreg),维持正常呼吸;③PBS+VALI组,腹腔注射PBS,30min后行机械通气;④Areg+VALI组,腹腔注射rmAreg,30 min后行机械通气;⑤DMSO+VALI组;⑥DMSO+Areg+VALI组,每只腹腔注射二甲基亚砜(dimethylsulfoxide,DMSO)100μL,30 min后腹腔注射PBS或rmAreg,再经30 min后行机械通气;⑦AG1478+Areg+VALI组与⑧Perifosine+Areg+VALI组,每只腹腔注射AG1478 1 mg或Perifosine 1 mg,30 min后腹腔注射rmAreg,再经30 min后行机械通气。小鼠通过大潮气量机械通气(潮气量12 mL/kg,频率90次/分,通气4 h)制作VALI模型。机械通气24 h后行肺组织HE染色并观察病理学变化,检测支气管肺泡灌洗液(Bronchoalveolar lavage fluid,BALF)中总蛋白、免疫球蛋白M(Immunoglobulin M,IgM)、肿瘤坏死因子α-(Tumor necrosis factor,TNF-α)与白细胞介素-6(Interleukin-6,IL-6)的浓度;机械通气6 h后检测肺组织中上皮生长因子受体(Epidermal growth factor receptor,EGFR)与蛋白激酶B(AKT)的磷酸化水平。结果与0 h组[(62.0±19.4) pg/mL]相比,VALI小鼠在机械通气结束3、6、12、24 h后BALF中的Areg浓度有明显升高,其中在6 h升高最为显著[(231.8±58.7) pg/mL]。与Control组相比,PBS+VALI组小鼠的肺组织肺泡壁增厚,炎症反应显著增加,而在Areg+VALI组中这些病理损伤均有明显减轻。与Control组相比,PBS+VALI组小鼠BALF中总蛋白、IgM、TNF-α与IL-6均有显著升高,而相较于PBS+VALI组,Areg+VALI组中这些指标有明显降低。rmAreg显著提高了VALI小鼠肺组织中EGFR与AKT的磷酸化水平。AG1478与Perifosine均明显抑制了rmAreg对VALI肺组织的作用效果。结论小鼠发生VAObjective To study the protective effect of Amphiregulin(Areg)on ventilator-associated lung injury(VALI)in mice and to explore the potential mechanisms.Methods Male C57BL/6 mice were randomly divided into eight groups according to the random number table:(1)control group,mice were injected with Phosphate buffer solution(PBS:200μL)and treated with normal breathing;(2)Areg group,mice were injected with recombinant mouse Areg(rmAreg)and treated with normal breathing;(3)PBS+VALI group,mice were intraperitoneally administrated with PBS,and then were treated with high tidal volume mechanical ventilation 30 min later;(4)Areg+VALI group,mice were intraperitoneally injected with PBS,and then were subjected to high tidal volume mechanical ventilation 30 min later;(5)DMSO+VALI group and(6)DMSO+Areg+VALI group,mice were injected with DMSO(100μL),followed by treatment with PBS or rmAreg 30 min later,and then were subjected to high tidal volume mechanical ventilation 30 min later;(7)AG1478+Areg+VALI group and(8)Perifosine+Areg+VALI group,mice were administered intraperitoneally with AG1478 or Perifosine,followed by injection with rmAreg 30 min later,and then were subjected to high tidal volume mechanical ventilation 30 min later.To establish VALI model,male C57BL/6 mice were ventilated at high tidal volume(12μL/kg)with 90 breaths/min for 4 hours after being anesthetized.At 24 hours after ventilation,mice lung tissues were stained with HE and examined at the light microscopy level,and the concentrations of total protein,Immunoglobulin M(IgM),Tumor necrosis factor(TNF-α)and Interleukin-6(IL-6)in Bronchoalveolar lavage fluid(BALF)were tested.At 6 hours after ventilation,the phosphorylation levels of epidermal growth factor receptor(EGFR)and protein kinase B(AKT)in lung tissues were detected by western blot.Methods Male C57BL/6 mice were randomly assigned into eight groups according to the random number table:①control group and②Areg group,mice injected with Phosphate buffer solution(PBS)or recombinant mouse Areg(rmAreg);�

关 键 词：呼吸机相关性肺损伤 双调蛋白 上皮生长因子受体 肺泡灌洗液 小鼠 

分 类 号：R563[医药卫生—呼吸系统]