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. 1974 Mar 1;60(3):673–684. doi: 10.1083/jcb.60.3.673

HUMAN VASCULAR ENDOTHELIAL CELLS IN CULTURE

Growth and DNA Synthesis

Michael A Gimbrone Jr 1, Ramzi S Cotran 1, Judah Folkman 1
PMCID: PMC2109230  PMID: 4363161

Abstract

Human endothelial cells, obtained by collagenase treatment of term umbilical cord veins, were cultured using Medium 199 supplemented with 20% fetal calf serum. Small clusters of cells initially spread on plastic or glass, coalesced and grew to form confluent monolayers of polygonal cells by 7 days. Cells in primary and subcultures were identified as endothelium by the presence of Weibel-Palade bodies by electron microscopy. A morphologically distinct subpopulation of cells contaminating some primary endothelial cultures was selectively subcultured, and identified by ultrastructural criteria as vascular smooth muscle. Autoradiography of endothelial cells after exposure to [3H]thymidine showed progressive increases in labeling in growing cultures beginning at 24 h. In recently confluent cultures, labeling indices were 2.4% in central closely packed regions, and 53.2% in peripheral growing regions. 3 days after confluence, labeling was uniform, being 3.5 and 3.9% in central and peripheral areas, respectively. When small areas of confluent cultures were experimentally "denuded," there were localized increases in [3H]thymidine labeling and eventual reconstitution of the monolayer. Liquid scintillation measurements of [3H]thymidine incorporation in primary and secondary endothelial cultures in microwell trays showed a similar correlation of DNA synthesis with cell density. These data indicate that endothelial cell cultures may provide a useful in vitro model for studying pathophysiologic factors in endothelial regeneration.

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Selected References

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