Neonatal ACE inhibition in rats interferes with lung development

Authors: Lasaitiene D.¹; Chen Y.¹; Nannmark U.²; Wollmer P.³; Friberg P.

Source: Clinical Physiology and Functional Imaging, Volume 24, Number 1, January 2004 , pp. 65-68(4)

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Abstract:

Summary

The renin–angiotensin system (RAS) is developmentally up-regulated and it is essential for kidney development in several species. Given the fact that the rat lung undergoes postnatal development, the mammalian lung possesses the highest angiotensin-converting enzyme (ACE) levels and ACE activity increases during the first weeks postpartum, we tested the hypothesis that ACE inhibition influences postnatal lung development. Rats were given the ACE inhibitor enalapril (10 mg kg^-1) from 0 to 9 days of age and their lungs were examined at day 4 and 9. Lung structure was evaluated by means of light microscopy, and surface tension of bronchoalveolar lavage fluid was measured by means of a Wilhelmy balance. Neonatal ACE inhibition lowered the surface tension of bronchoalveolar lavage fluid and caused widening of respiratory airspaces and thinning of alveolar septa. Our results suggest that early postnatal ACE inhibition in rats interferes with lung development.

Keywords: angiotensin-converting enzyme; lung development; renin–angiotensin system; surface tension; Wilhelmy balance

Document Type: Research article

DOI: http://dx.doi.org/10.1046/j.1475-0961.2003.00530.x

Affiliations: 1: Department of Physiology 2: Department of Anatomy and Cell Biology, University of Gothenburg, Gothenburg, Sweden 3: Department of Clinical Physiology, Malmo University Hospital, Malmo, Sweden

Publication date: 2004-01-01