Endogenous and exogenous catalase in reoxygenation lung injury

Robert Jackson, W. J. Russell, C. F. Veal

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

Reexpansion pulmonary edema parallels reperfusion (reoxygenation) injuries in other organs in that hypoxic and hypoperfused lung tissue develops increased vascular permeability and neutrophil infiltration after reexpansion. This study investigated endogenous lung catalase activity and H2O2 production during hypoxia (produced by lung collapse) and after reoxygenation (resulting from reexpansion), in addition to assessing the effects of exogenous catalase infusion on the development of unilateral pulmonary edema after reexpansion. Lung collapse resulted in a progressive increase in endogenous catalase activity after 3 (14%) and 7 days (23%), while activities in contralateral left lungs did not change (normal left lungs averaged 180 ± 11 units/mg DNA). Tissue from control left lungs released H2O2 into the extracellular medium at a rate calculated to be 242 ± 34 nmol · h-1 · lung-1. No significant change in extracellular release of H2O2 occurred after 7 days of right lung collapse. However, after reexpansion of the previously collapsed right lungs for 2 h, H2O2 release from both reexpanded right and contralateral left lungs significantly increased (88 and 60%, respectively) compared with controls. Infusion of exogenous catalase significantly increased plasma and lung catalase activities. Exogenous catalase infusion prevented neither the increase in lung permeability nor the infiltration with neutrophils that typically occurs in reexpanded lungs. These data indicate that lung hypoxia/reoxygenation, induced by sequential collapse and reexpansion, has specific effects on endogenous lung catalase activity and H2O2 release. However, exogenous catalase does not prevent reexpansion pulmonary edema, eliminating extracellular (but not intracellular) H2O2 as an important mediator of unilateral lung injury in this model.

Original languageEnglish
Pages (from-to)858-864
Number of pages7
JournalJournal of Applied Physiology
Volume72
Issue number3
StatePublished - Jan 1 1992
Externally publishedYes

Fingerprint

Lung Injury
Catalase
Lung
Pulmonary Atelectasis
Pulmonary Edema
Neutrophil Infiltration
Capillary Permeability
Reperfusion Injury
Permeability

Keywords

  • hydrogen peroxide
  • lung tissue hypoxia
  • oxidant lung injury
  • reexpansion pulmonary edema

ASJC Scopus subject areas

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

Cite this

Endogenous and exogenous catalase in reoxygenation lung injury. / Jackson, Robert; Russell, W. J.; Veal, C. F.

In: Journal of Applied Physiology, Vol. 72, No. 3, 01.01.1992, p. 858-864.

Research output: Contribution to journalArticle

Jackson, Robert ; Russell, W. J. ; Veal, C. F. / Endogenous and exogenous catalase in reoxygenation lung injury. In: Journal of Applied Physiology. 1992 ; Vol. 72, No. 3. pp. 858-864.
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