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Perturbation of cultured human endothelial cells by atherogenic levels of low density lipoprotein. Am J Pathol 1988 Sep;132(3):474-8

Date

09/01/1988

Pubmed ID

3046368

Pubmed Central ID

PMC1880753

Scopus ID

2-s2.0-0023677144   56 Citations

Abstract

Cultured human umbilical vein endothelial cells (EC) exposed to atherogenic levels of low density lipoprotein (LDL) for protracted periods demonstrated no measurable evidence of overt cytotoxicity, but were perturbed as indicated by an increase in prostacyclin (PGI2) production. Confluent EC were incubated with high LDL concentrations (240 or 330 mg/dl cholesterol) for 1 to 12 days. LDL was added to culture media containing 25% human lipoprotein-deficient serum to determine the effects of LDL independent of other lipoproteins. LDL did not injure EC as assessed by cell count, vital dye exclusion, 51chromium release, and lactate dehydrogenase release. Although high concentrations of LDL did not cause EC cytotoxicity, such LDL concentrations did results in increased PGI2 generation. PGI2 accumulation in postincubation media was increased two-to-fivefold in otherwise unstimulated cells as measured by radioimmunoassay of the stable PGI2 breakdown product, 6-keto-PGF1-alpha. This elevation persisted for the entire 12-day exposure to high LDL concentrations. These results indicate that prolonged exposure to atherogenic concentrations of LDL does not effect EC viability, but does cause an endothelial perturbation as demonstrated by an increased PGI2 production.

Author List

Holland JA, Pritchard KA, Rogers NJ, Stemerman MB

Author

Kirkwood A. Pritchard PhD Professor in the Surgery department at Medical College of Wisconsin




MESH terms used to index this publication - Major topics in bold

Arteriosclerosis
Endothelium
Epoprostenol
Humans
Lipoproteins, LDL
jenkins-FCD Prod-482 91ad8a360b6da540234915ea01ff80e38bfdb40a