摘要
目的观察右美托咪定预处理和后处理对大鼠肺缺血再灌注(1/R)所致急性肺损伤的影响。方法32只sD大鼠随机分为对照组、I/R组、预处理组和后处理组,每组8只,除对照组外,各组均建立肺缺血再灌注急性肺损伤动物模型,测定各组动脉血氧分压(PaO2)、肺组织干湿重比(W/D)、氧化应激分子、炎性介质的含量及凋亡分子的表达量。结果I/R组、预处理组及后处理组中肺组织W/D、丙二醛(MDA)、C反应蛋白(CRP)、肿瘤坏死因子-α(TNF—α)、单核细胞趋化蛋白-1(MCP-1)含量及B细胞淋巴瘤/白血病-2相关X蛋白(bax)、半胱氨酰天冬氨酸特异性蛋白酶(Caspase)-3表达量均依次降低[5.97±0.74、4.42±0.62、3.88±0.44;(20.35±2.65、15.54±1.73、11.21±1.36)nmol/L;(7.21±0.89、4.14±0.54、3.56±0.44)mg/L;(66.51-4-7.38、49.59±5.27、44.25±4.63)ng/L;(38.284-4.76、25.394-3.49、21.244-3.12)ng/L;236.75±28.48、176.59±18.39、155.35±14.68;194.78±20.35、148.54±15.86、130.15±12.45];而动脉血氧分压(PaO2)、超氧化物歧化酶(SOD)、谷胱甘肽(GSH)含量及bcl-2表达量均依次升高[(68.73±7.13、80.53±7.35、88.65±7.75)mmHg(1mmHg=0.133kPa);(24.48±3.25、32.65±3.24、36.42±3.36)u/L;(30.45±3.51、45.97±5.13、53.12±5.45)U/L;36.65±4.12、66.76±7.38、74.65±7.241。结论右美托咪定预处理和后处理对大鼠肺缺血再灌注所致急性肺损伤具有保护效应,能够减轻氧化应激损伤以及炎性反应所引起的细胞损伤和凋亡,且右美托咪定后处理保护效果更好。
Objective To study the effect of dexmedetomidine preconditioning and postcondition- ing on acute lung injury by lung ischemia - reperfusion (I/R) in rats. Methods 32 SD rats were divided into control group, IfR group, preconditioning group, posteonditioning group. All the groups establish the model of acute lung injury by lung isehemia - reperfusion, except the control group. Arterial blood oxygen partial pressure, lung coefficient, oxidative stress and inflammation mediator content, the expression of ap- optosis molecule were measured. Results The lung tissue wet / dry weight ratio (W/D) , malondialde- hyde ( MDA), C - reactive protein (CRP) and tumor necrosis factor - α ( TNF -α ), monocyte chemo- taxis protein - 1 ( MCP - 1 ) content and bax, Caspase - 3 expression were decreased from I/R group to pre- conditioning group, and to postconditioning group, respectively [ 5.97 ± 0. 74,4.42 ± 0. 62,3.88 ± 0. 44 ; (20. 35 ±2. 65,15.54 ± 1.73,11.21 ± 1.36) nmol/L; (7.21 ±0. 89,4. 14 ±0. 54,3,56 ±0.44) mg/L; (66.51 ±7.38,49.59 ±5.27,44.25 ±4.63) ng/L; (38.28 ±4.76,25.39 ±3.49,21.24 ±3.12) ng/L; 236.75 ± 28.48,176. 59 ± 18. 39,155.35 ± 14. 68 ; 194. 78 ± 20. 35,148. 54 ± 15.86,130. 15 ± 12. 45 ]. While the arterial oxygen pressure ( PaO2 ), superoxide dismutase ( SOD), glutathione (GSH) content and bcl -2 expression were increased from I/R group to preconditioning group, and to posteonditioning group, respectively [ (68.73 ± 7.13,80. 53 ± 7.35,88.65 ± 7.75 ) mmHg ( 1 mmHg = 0. 133 kPa) ; (24. 48 ± 3.25,32.65 ±3.24,36.42 ±3.36) U/L;(30.45±3.51,45.97±5.13,53.12±5.45) U/L;36.65± 4. 12,66. 76 ±7. 38,74. 65 ± 7.24 ]. Conclusion Dexmedetomidine preconditioning and postconditioning have a protective effect on acute lung injury by lung ischemia - reperfusion in rats and can reduce cell inju- ry and apoptosis induced by oxidative stress injury and inflammation, and the protective effect of dexme- detomidine postconditioning is better.
出处
《中华实验外科杂志》
CAS
CSCD
北大核心
2016年第6期1604-1607,共4页
Chinese Journal of Experimental Surgery
关键词
急性肺损伤
再灌注损伤
右美托咪定
预处理
后处理
Acute lung injury
Reperfusion injury
Dexmedetomidine
Preconditioning
Postconditioning
作者简介
通信作者:朱洁芳,Email:37952463@qq.com