纳洛酮对油酸型ARDS大鼠血清中心房钠尿肽、B型脑钠肽及肺组织Na+-K+-ATP酶含量的影响研究
2016-08-18崔青松金明根黄莉花延边大学附属医院重症医学科吉林延吉133000
崔青松 金明根 黄莉花延边大学附属医院重症医学科,吉林延吉 133000
纳洛酮对油酸型ARDS大鼠血清中心房钠尿肽、B型脑钠肽及肺组织Na+-K+-ATP酶含量的影响研究
崔青松金明根黄莉花
延边大学附属医院重症医学科,吉林延吉133000
目的研究纳洛酮对油酸型急性呼吸窘迫综合征(ARDS)大鼠的血清中心房钠尿肽、B型脑钠肽及肺组织Na+-K+-ATP酶含量的影响。方法2014年1月~2015年1月将30只健康SD大鼠随机分为正常组、ARDS模型组、纳洛酮治疗组,由股静脉缓慢注入油酸0.1mL/kg建立ARDS模型,测定血清中心房钠尿肽(ANP)、B型脑钠肽(BNP)、肺组织Na+-K+-ATP酶(NKA)含量,计算左肺湿/干重比值,制备光镜标本和电镜标本观察肺组织。结果ARDS模型组与正常组比较,左肺湿/干重比值、血清ANP、BNP含量显著升高,肺组织NKA含量显著下降(P<0.01),肺组织出现明显病理损害,与ARDS模型组比较纳洛酮治疗组的变化较轻(P<0.01),肺组织变化较轻。结论纳洛酮可抑ANP、BNP升高,提高肺组织Na+-K+-ATP酶活性,纳洛酮对实验性大鼠油酸型急性呼吸窘迫综合征有一定的治疗作用。
纳洛酮;急性呼吸窘迫综合征;油酸;心房钠尿肽;B型脑钠肽
[Abstract]Objective To study the influence of naloxone on serum atrial natriuretic peptide(ANP)and B-type natriuretic peptide(BNP),and Na+-K+-ATP enzyme(NKA)content in lung tissues in oleic acid induced acute respiratory distress syndrome(ARDS)rats.M ethods From January 2014 to January 2015,30 healthy SD ratswere randomly divided into normal group,ARDSmodel group,and naloxone treatment group.The ARDSmodel was established by oleic acid 0.1 mL/kg i.v.,and levels of serum ANP and BNP,and NKA content in lung tissues were determined.The wet/dry weight ratio of the left lungwas calculated,and the lung tissueswere observed by lightmicroscope and electronmicroscope.Results The wet/dry weight ratio of the left lung,and levels of serum ANP and BNPwere significantly higher in the ARDSmodel group than in the normal group,and the NKA content in lung tissues was significantly lower in the ARDSmodel group than in the normal group(P<0.01),with evident pathological impairment of lung tissues.While compared with the ARDSmodel group,the pathological change in the naloxone treatment group wasmilder(P<0.01),with less pathological impairment of lung tissues.Conclusion Naloxone can inhibit the increase of ANP and BNP,and enhance the enzymatic activity of Na+-K+-ATP enzyme in lung tissues,thus showing a certain therapeutic effect on experimental ratswith oleic acid induced acute respiratory distress syndrome.
[Key words]Naloxone;Acute respiratory distress syndrome;Oleic acid;Atrial natriuretic peptide;B-type natriuretic peptide
急性呼吸窘迫综合征(acute respiratory distress syndrome,ARDS)是重症医学科的常见病、多发病,是指由心源性以外的各种肺内外致病因素所导致的以进行性低氧血症、呼吸窘迫为特征的临床综合征[1,2]。虽然目前ARDS的治疗手段有所改善,但是其发病机制仍不清楚,患者的病死率仍较高[3]。ARDS的发病机制错综复杂,近年来有资料表明钠水转运与ARDS的发病有关。ANP与BNP均为钠尿肽家族的一员,肺是右心房释放ANP后的第一个靶器官,所以ANP可对肺循环和肺通气功能具有调节作用,BNP主要代谢场所是肺循环,ARDS时严重损伤肺毛细血管网,使肺脏对BNP清除能力进而下降[4]。……
