The DOI matches its Crossref record; 52 of the 52 references it cites were found in a registry or an index.
Dietary fat clearance in normal subjects is regulated by genetic variation in apolipoprotein E.
Open accessAbstract
Apolipoprotein E (apo E) plays an important role in receptor mediated clearance of lipoprotein particles from plasma. Common genetic variation in apo E exists with three alleles coding for proteins called E2, E3, and E4. In in vitro receptor binding assays, E2 binds poorly, whereas E3 and E4 function normally. Recently, the apo E phenotype has been shown to have an effect on low density lipoprotein (LDL) cholesterol levels with levels in subjects with E2 lower and E4 higher than E3. We have examined the effect of the apo E polymorphism on dietary fat clearance using the vitamin A-fat loading test, which specifically labels intestinally derived lipoproteins with retinyl palmitate (RP). 27 normal subjects were studied, 10 with E3/3, 9 with E3/2, 7 with E4/3, and 1 with E4/4. After a vitamin A-containing fatty meal, postprandial RP concentrations were measured in chylomicron (Sf greater than 1,000) and nonchylomicron (Sf less than 1,000) fractions for 14 h. Compared with E3/3 subjects, E3/2 subjects had a significantly higher nonchylomicron RP concentration (P less than 0.05) (peak heights and areas below the curves) indicating slower clearance and the E4/3, E4/4 group had a significantly lower nonchylomicron RP concentration (P less than 0.05) indicating faster clearance. The clearance in the latter group was twice that of E3/2 subjects (P less than 0.01). Thus, heterozygosity for the defective form of apo E, E2, delays, and the surprising presence of a functionally normal allele, E4, increases clearance. This apo E effect on exogenous fat clearance may explain the recently described effect of the apo E phenotypes on LDL cholesterol levels.
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Cited by
Triglycerides and Cardiovascular Disease: A Scientific Statement From the American Heart Association
Miller, M., Stone, N. J., Ballantyne, C., Bittner, V., Criqui, M. H., Ginsberg, H. N., Goldberg, A. C., Howard, W. J., Jacobson, M. S., Kris-Etherton, P. M., et al. (2011) · Circulation · doi:10.1161/cir.0b013e3182160726 · Cited by 1,871
Apolipoprotein E: Far More Than a Lipid Transport Protein
Mahley, R. W., & Rall, S. C. (2000) · Annual Review of Genomics and Human Genetics · doi:10.1146/annurev.genom.1.1.507 · Cited by 1,836
Relation of triglyceride metabolism and coronary artery disease. Studies in the postprandial state
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Apolipoprotein E: from cardiovascular disease to neurodegenerative disorders
Mahley, R. W. (2016) · Journal of Molecular Medicine · doi:10.1007/s00109-016-1427-y · Cited by 837
Apolipoprotein E: Structure-Function Relationships
Weisgraber, K. H. (1994) · Advances in Protein Chemistry · doi:10.1016/s0065-3233(08)60642-7 · Cited by 830
Metadata
- Authors
- Weintraub, M. S., Eisenberg, S., & Breslow, J. L.
- Venue
- Journal of Clinical Investigation
- Published
- 1987-12-01
- Volume
- 80
- Issue
- 6
- Pages
- 1571-1577
- ISSN
- 0021-9738 (ISSN-L)
- OpenAlex
- W2003854546
- Cited by
- 418
- References
- 52
- FWCI
- 8.58
- Type
- journal article
- Language
- en
- Open access
- bronze
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