Heart angiotensin-converting enzyme activity increased after intraperitoneal bleomycin administration in rat.

Abstract:

:Angiotensin-converting enzyme (ACE) generates angiotensin II and degrades bradykinin. This ectopeptidase acts as a marker in pathologic conditions, showing tissue and vascular damage. In order to evaluate serum and tissue ACE activity in bleomycin-associated lung damage, the authors studied morphological and enzymatic alterations as well as blood pressure in male Sprague-Dawley rats. Animals were treated intraperitoneally with bleomycin (5 mg/kg) 3 times for 1 week. This subacute and therapeutic dose produced morphologically evident pulmonary damage characterized by alveolar septum thickness and collagen deposition. Bleomycin also had significantly lowered lung and aorta N-acetyl-beta-D-glucosaminidase (NAG) activity, whereas heart and serum NAG activity increased significantly. Serum ACE activity was significantly lower in the treated animals, and heart ACE activity increased significantly. Lung ACE activity and blood pressure did not change during the study. The authors conclude that heart ACE activity increased faster than pulmonary ACE and serum ACE is a good indicator of damage even in subacute therapeutic bleomycin doses.

journal_name

Exp Lung Res

authors

Ziai SA,Salehian P,Mahmoudian M

doi

10.1080/01902140490266556

subject

Has Abstract

pub_date

2004-03-01 00:00:00

pages

97-104

issue

2

eissn

0190-2148

issn

1521-0499

pii

9X8PXHG7R17NR02R

journal_volume

30

pub_type

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