Analysis of lipids and endothelial and smooth muscle cells of umbilical cord in familial homozygous hypercholesterolemia

Richard E. Ostlund, Shirley Vaerewyck Hajek, Richard A. Levy, Joseph L. Witztum

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Umbilical cord lipids from a familial hypercholesterolemia homozygote were extracted and quantitated. Free cholesterol was increased 26% and esterified cholesterol was increased 379% compared to normal, whereas phospholipid content was not altered. Analysis of homozygote umbilical artery revealed no excess cholesterol and the vessels were histologically normal. Thus, in the the homozygote cord, accumulation of cholesterol occurs first in Wharton's jelly, the hypocellular glycosaminoglycan-enriched cord matrix. Skin fibroblasts, umbilical vein endothelial cells, and umbilical vein smooth muscle cells were cultured from the homozygote. Low density lipoprotein receptor activity was reduced to 9%-38% of normal in all cell types from the homozygote, demonstrating that vessel cells express the LDL receptor defect seen in skin fibroblasts.

Original languageEnglish
Pages (from-to)285-289
Number of pages5
JournalMetabolism
Volume30
Issue number3
DOIs
StatePublished - Mar 1981

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