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. 1980 Feb;98(2):445–456.

Lysosomal alterations in hypoxic and reoxygenated hearts. II. Immunohistochemical and biochemical changes in cathepsin D.

R S Decker, A R Poole, J S Crie, J T Dingle, K Wildenthal
PMCID: PMC1903426  PMID: 6986784

Abstract

Sublethal hypoxic injury in rat and rabbit hearts was accompanied by a biochemical redistribution of cathepsin D activity from the particulate to the supernatant fraction of the tissue homogenate, which was partially reversible on reoxygenation. Immunofluorescent staining for cathepsin D failed to reveal major anatomic release of the acid hydrolase until necrosis was present, suggesting that the earlier biochemical redistribution was primarily a result of increased lysosomal fragility during homogenization, with significant intracellular diffusion of the enzyme occurring only as irreversible damage took place. Hypoxia produced enlargement of both cathepsin-D-staining lysosomes and nonstaining vacuoles, as well as their aggregation. These changes were intensified during reoxygenation and recovery of reversibly damaged hearts, suggesting a possible role for the lysosomal-vacuolar apparatus in myocytic repair following hypoxic injury.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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