Imperial College London
Alternate

ProfessorLanZhao

Faculty of Medicine, National Heart & Lung Institute

Professor of Experimental Medicine
 
 
 
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Contact

 

+44 (0)20 7594 6823l.zhao

 
 
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Location

 

531ICTEM buildingHammersmith Campus

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Summary

 

Publications

Citation

BibTex format

@article{Zhao:1996,
author = {Zhao, L and Al-Tubuly, R and Sebkhi, A and Owji, AA and DJR, N and Wilkins, MR},
journal = {British Journal of Pharmacology},
pages = {1217--1222},
title = {Angiotensin II receptor expression and inhibition in the chronically hypoxic rat lung},
volume = {119},
year = {1996}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - 1. Angiotensin II (AII) binding density and the effect of chronic AII receptor blockade were examined in the rat model of hypoxia-induced pulmonary hypertension. 2. [125I]-[Sar1,Ile2]AII binding capacity was increased in lung membranes from rats exposed to hypoxia (10% fractional inspired O2) for 7 days compared to normal rats (Bmax 108 +/- 12 vs 77 +/- 3 fmol mg-1 protein; P < 0.05), with no significant change in dissociation constant. Competition with specific AII receptor subtype antagonists demonstrated that AT1 is the predominant subtype in both normal and hypoxic lung. 3. Rats treated intravenously with the AT1 antagonist, GR138950C, 1 mg kg-1 day-1 rather than saline alone during 7 days of exposure to hypoxia developed less pulmonary hypertension (pulmonary arterial pressure: 21.3 +/- 1.7 vs 28.3 +/- 1.1 mmHg; P < 0.05), right ventricular hypertrophy (right/left ventricle weight ratio: 0.35 +/- 0.01 vs 0.45 +/- 0.01; P < 0.05) and pulmonary artery remodelling (abundance of thick-walled pulmonary vessels: 9.6 +/- 1.4% vs 20.1 +/- 0.9%; P < 0.05). 4. The reduction in cardiac hypertrophy and pulmonary remodelling with the AT1 antagonist was greater than that achieved by a dose of sodium nitroprusside (SNP) that produced a comparable attenuation of the rise in pulmonary arterial pressure during hypoxia. 5. The data suggest that AII, via the AT1 receptor, has a role in the early pathogenesis of hypoxia-induced pulmonary hypertension in the rat.
AU  - Zhao,L
AU  - Al-Tubuly,R
AU  - Sebkhi,A
AU  - Owji,AA
AU  - DJR,N
AU  - Wilkins,MR
EP  - 1222
PY  - 1996///
SP  - 1217
TI  - Angiotensin II receptor expression and inhibition in the chronically hypoxic rat lung
T2  - British Journal of Pharmacology
VL  - 119
ER  -
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