摘要
目的研究肾上腺髓质素(ADM)对大鼠低氧性肺动脉高压的调节作用。方法24只雄性Wistar大鼠随机分为对照组、低氧组、低氧+ADM组,每组各8只。对于低氧+ADM组大鼠通过微量渗透泵皮下持续给予ADM(300ng/h)。低氧2周后,以右心导管法测定肺动脉收缩压(sPAP)和肺动脉平均压(mPAP),测量体循环平均压(mSAP),检测右心室与左心室加室间隔比值[RV/(LV+S)]。结果低氧2周后大鼠sPAP、mPAP和RV/(LV+S)较对照组明显增高(P均<0.01),低氧+ADM组大鼠sPAP、mPAP和RV/(LV+S)较低氧组明显减低(P均<0.01),而mSAP在3组之间无明显差异。结论通过微量渗透泵皮下持续给予低氧大鼠ADM,缓解了低氧性肺动脉高压形成。
Objective To study the modulation effect of adrenomedullin (ADM) on hypoxia pulmonary hypertension in rats.Methods Twenty-four male Wistar rats were randomly divided into control group ( n =8), hypoxic group ( n =8), hypoxic with ADM group ( n =8). ADM was subcutaneously administered into rats of hypoxic with ADM group by mini-osmotic pump (300 ng/h). After two weeks hypoxic challenge, systolic pulmonary arterial pressure (sPAP) and mean pulmonary arterial pressure (mPAP) were evaluated by a right cardiac catheterization procedure. Mean systemic artery pressure (mSAP) was measured. The ratio of right ventricular mass to left ventricular plus septal mass [RV/(LV+S)] was detected.Results sPAP, mPAP and RV/(LV+S) significantly increased in hypoxic rats compared with controls ( P <0.01, respectively). sPAP, mPAP and RV/(LV+S) significantly decreased in rats of hypoxic with ADM group compared with those of hypoxic group ( P <0.01, respectively). No significant difference was found in mSAP among the three groups.Conclusion ADM subcutaneously administered by mini-osmotic pump may alleviate the development of hypoxic pulmonary hypertension in rats.
出处
《实用儿科临床杂志》
CAS
CSCD
北大核心
2005年第7期628-629,共2页
Journal of Applied Clinical Pediatrics
基金
国家自然科学基金项目资助(30300376)
国家重点基础研究发展规划项目资助(973G2000056905)
