Adrenomedullin relieves the pulmonary hypertension in hypoxic rats
- VernacularTitle:肾上腺髓质素缓解大鼠低氧性肺动脉高压
- Author:
Ping XU
;
Aiguo DAI
;
Yuanyuan LIU
;
Jiali PI
;
Weidong SONG
- Publication Type:Journal Article
- Keywords:
adrenomedullin;
receptor;
hypoxia;
pulmonary hypertension
- From:
Basic & Clinical Medicine
2006;0(06):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the effects and mechanisms of adrenomedullin (ADM) and adrenomedullin receptor (ADMR) on hypoxia pulmonary hypertension (HPH) in rats.Methods Eighteen male Wistar rats were randomly divided into three groups:control group, hypoxic group and hypoxic plus ADM group.ADM was subcutaneously administered into rats with ADM. After 21 days, The mean pulmonary arterial pressure (mPAP) and right ventricular hypertrophy index[RV/(LV+S)] were measured. Hypoxic pulmonary vascular remodeling(HPSR) was observed with morphometric analysis. The level of pulmonary arterial plasma ADM was measured by radioimmunoassay. The semiquantitate in situ hybridization was used to measure the expression of ADMR mRNA in pulmonary artery walls. Results (1) The level of mPAP, RV/(LV+S),the ratio of vascular wall thick ness to external diameter(MT%) and ratio of vascular wall area to total area (MA%) were significantly higher in hypoxia group than those in control group(2) The pulmonary artery plasma ADM level was significantly higher in hypoxic group and hypoxic plus ADM group than that in control group(P
