Studies on lipoprotein metabolism in a family with jejunal chylomicron retention

A. Nemeth, U. Myrdal, B. Veress, M. Rudling, Lars Berglund, B. Angelin

Research output: Contribution to journalArticlepeer-review

23 Scopus citations


We describe two siblings with fat malabsorption and jejunal chylomicron retention. Plasma lipoproteins were studied in the patients and their first- degree relatives. The patients were a 14-year-old girl and her 8-year-old brother. Compared to healthy controls, they both had low fasting plasma concentrations of plasma total, HDL, and LDL cholesterol, as well as of apolipoproteins A-I and B. No increase in plasma lipoprotein levels or detectable apo B-48 was observed following an oral fat load. Histological studies of jejunal biopsy specimens obtained during fasting and 1 h postprandially showed severe steatosis, and an apparent block of chylomicron secretion from the endoplasmic reticulum into the Golgi apparatus was observed by electron microscopy. Liver biopsy specimens showed moderate steatosis and ultrastructural changes similar to those in the enterocytes. One healthy sister had a normal plasma lipoprotein pattern, and showed increased plasma triglyceride levels as well as the presence of apo B-48 following an oral fat load. Both parents had normal plasma total cholesterol levels, but clearly reduced fasting concentrations of HDL cholesterol and apo A-I. At least in this family, determination of plasma apo A-I levels might thus prove useful in the identification of heterozygotes.

Original languageEnglish (US)
Pages (from-to)271-280
Number of pages10
JournalEuropean Journal of Clinical Investigation
Issue number4
StatePublished - 1995
Externally publishedYes


  • Chylomicrons
  • fat absorption
  • genetic disease
  • lipoproteins
  • steatosis

ASJC Scopus subject areas

  • Medicine(all)


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