Increased lysosomal enzymes in lungs of ozone-exposed rats

C. J. Dillard, N. Urribarri, K. Reddy, B. Fletcher, S. Taylor, B. De Lumen, S. Langberg, A. L. Tappel

Research output: Contribution to journalArticlepeer-review

25 Scopus citations


Groups of rats were exposed continuously for five days at 0.7 ± 0.15 ppm ozone or for seven days at 0.79 ± 0.14 ppm ozone. The specific activities of the lysosomal hydrolases, acid phosphatase; β-N-acetylglucosaminidasej cathepsins A, B, C, and D and benzoylarginine-β-naphthylamide (BANA) amidohydrolase, were measured in whole lung homogenates, cell-free particulates or light mitochondrial fractions, and in the supernatant fractions. Statistically significant increases in the specific activities of these hydrolases from the lungs of ozone-exposed rats were observed over those from control animals. The cause of the increases can be attributed to the infiltration of the lung by phagocytic cells in the inflammatory response induced by ozone. The increase in specific activities of the proteases and peplidases in the lungs is of significance when related to chronic obstructive pulmonary disease and cases of genetic deficiency of ill-antitrypsin factor.

Original languageEnglish (US)
Pages (from-to)426-431
Number of pages6
JournalArchives of environmental health
Issue number6
StatePublished - Dec 1972
Externally publishedYes

ASJC Scopus subject areas

  • Environmental Chemistry
  • Environmental Science(all)
  • Public Health, Environmental and Occupational Health
  • Health, Toxicology and Mutagenesis


Dive into the research topics of 'Increased lysosomal enzymes in lungs of ozone-exposed rats'. Together they form a unique fingerprint.

Cite this