Acute cigarette smoke exposure increases alveolar permeability in rabbits

M. L. Witten, R. J. Lemen, S. F. Quan, R. E. Sobonya, H. Roseberry, J. L. Stevenson, J. Clayton

Research output: Contribution to journalArticlepeer-review

42 Scopus citations

Abstract

We measured lung clearance of aerosolized technetium-labeled diethylenetriamine pentaacetic acid (99mTcDTPA) as an index of alveolar epithelial permeability in rabbits exposed to cigarette smoke. Eighteen rabbits were randomly assigned to 3 equal-size groups: control, all smoke exposure (ASE), and limited smoke exposure (LSE). Cigarette or sham smoke was delivered by syringe in a series of 5, 10, 20, and 30 tidal volume breaths with a 20-min counting period between each subset of breaths to determine 99mTcDTPA biologic half-life (T 1/2 ). Mean T 1/2 minimum (i.e., the smallest T 1/2 observed) was significantly lower (p < 0.05) for ASE and LSE rabbits than by control rabbits. We observed a significant difference at 20 and 30 breath exposures between the control and ASE group mean values (% baseline) for T 1/2 , arterial blood pressure, and peak airway pressure. A combination of light and electron microscopy showed focal alveolar edema and hemorrhage in the ASE and LSE group but no alveolar-capillary membrane damage. In summary, acute cigarette smoke exposure increases alveolar permeability as measured by 99mTcDTPA clearance, but there was no detectable ultrastructural alteration of the alveolar-capillary membrane.

Original languageEnglish (US)
Pages (from-to)321-325
Number of pages5
JournalAmerican Review of Respiratory Disease
Volume132
Issue number2
StatePublished - 1985

ASJC Scopus subject areas

  • Pulmonary and Respiratory Medicine

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