Endothelial Cell Heterogeneity: Antioxidant Profiles Determine Vulnerability to Oxidant Injury

Gregory M. Vercellotti, Martha Dobson, Anna E. Schorer, Charles F. Moldow

Research output: Contribution to journalArticlepeer-review

43 Scopus citations

Abstract

Human umbilical vein endothelial cells were more sensitive to hydrogen peroxide lysis than cow pulmonary artery endothelial cells. Conversely, activated neutrophils which utilize hydrogen peroxide-mediated cell cytotoxicity cell mechanisms were more toxic to the cow pulmonary artery cells. This discordance was not related to neutrophil adhesion to either cell type or cell passage number. The antioxidant profiles of the endothelial cells revealed that cow pulmonary artery cells were rich in catalase to consume bolus hydrogen peroxide presented to them, while human umbilical vein endothelial cells utilize glutathione peroxidase-linked mechanisms to detoxify a slower more sustained release of hydrogen peroxide generated by neutrophils. Endothelial cells from different species and sites may utilize diversified antioxidant protective mechanisms.

Original languageEnglish (US)
Pages (from-to)181-189
Number of pages9
JournalProceedings of the Society for Experimental Biology and Medicine
Volume187
Issue number2
DOIs
StatePublished - Feb 1988

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