Angiotensin-converting enzyme inhibitor captopril attenuates ventilator-induced lung injury in rats

Jiunn Song Jiang, Leng-Fang Wang, Hsiu Chu Chou, Chung Ming Chen

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

We hypothesized that lung inflammation and parenchymal apoptosis in ventilator-induced lung injury (VILI) are related to ANG II and assessed the ability of the angiotensin-converting enzyme inhibitor captopril to attenuate VILI in rats. Adult male Sprague-Dawley rats were randomized to receive two ventilation strategies for 2 h: 1) tidal volume of 40 ml/kg, respiratory rate of 25 breaths/min, and inspiratory O2 fraction of 0.21 [high-volume, 0 positive end-expiratory pressure (HVZP) group] and 2) injection of captopril (100 mg/kg ip) 30 min before HVZP ventilation (HVZP + CAP group). Another group, which did not receive ventilation, served as the control. Mean arterial pressure was significantly lower in the HVZP + CAP group than in the HVZP group at 2 h of ventilation. Total protein levels were significantly higher in bronchoalveolar lavage fluid (BALF) recovered from HVZP-ventilated rats than from controls. BALF macrophage inflammatory protein-2 and lung ANG II were significantly higher in the HVZP group than in the control and HVZP + CAP groups. Lung ANG II levels correlated positively with BALF protein and macrophage inflammatory protein-2. The number of apoptotic airway and alveolar wall cells was significantly higher in the HVZP and HVZP + CAP groups than in the control group and significantly lower in the HVZP + CAP group than in the HVZP group. These results suggest that the efficiency of captopril to attenuate VILI is related to reduction of inflammatory cytokines and inhibition of apoptosis and indicate that VILI is partly mediated by the local angiotensin system.

Original languageEnglish
Pages (from-to)2098-2103
Number of pages6
JournalJournal of Applied Physiology
Volume102
Issue number6
DOIs
Publication statusPublished - Jun 2007

Fingerprint

Ventilator-Induced Lung Injury
Captopril
Angiotensin-Converting Enzyme Inhibitors
Ventilation
Bronchoalveolar Lavage Fluid
Chemokine CXCL2
Apoptosis
Alveolar Epithelial Cells
Lung
Control Groups
Positive-Pressure Respiration
Tidal Volume
Angiotensins
Respiratory Rate
Sprague Dawley Rats
Pneumonia
Arterial Pressure
Proteins
Cytokines
Injections

Keywords

  • Apoptosis
  • Bronchoalveolar lavage
  • Macrophage inflammatory protein

ASJC Scopus subject areas

  • Physiology
  • Endocrinology
  • Orthopedics and Sports Medicine
  • Physical Therapy, Sports Therapy and Rehabilitation

Cite this

Angiotensin-converting enzyme inhibitor captopril attenuates ventilator-induced lung injury in rats. / Jiang, Jiunn Song; Wang, Leng-Fang; Chou, Hsiu Chu; Chen, Chung Ming.

In: Journal of Applied Physiology, Vol. 102, No. 6, 06.2007, p. 2098-2103.

Research output: Contribution to journalArticle

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