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Studies on a beta-migrating high density lipoprotein.

M Wada, T Minamisono, M Komoda

    Clinica Chimica Acta; International Journal of Clinical Chemistry
    |July 15, 1977
    PubMed
    Summary
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    A Japanese family displayed an unusual serum lipoprotein profile, revealing a distinct high-density lipoprotein (HDL) subfraction migrating as a double beta-lipoprotein. This genetic trait, linked to an autosomal dominant gene, did not correlate with premature heart disease in the study subjects.

    Area of Science:

    • Biochemistry
    • Genetics
    • Clinical Chemistry

    Background:

    • Serum lipoprotein profiles are crucial for cardiovascular health assessment.
    • Unusual lipoprotein electrophoretic mobility can indicate underlying genetic or metabolic conditions.
    • Previous studies suggested links between abnormal lipoproteins and ischemic heart disease.

    Purpose of the Study:

    • To characterize an unusual serum lipoprotein (Lp) phenotype observed in a Japanese family.
    • To identify the nature and properties of the abnormal beta-lipoprotein.
    • To investigate the genetic basis and clinical implications of this lipoprotein variant.

    Main Methods:

    • Polyacrylamide gel electrophoresis of serum lipoproteins.
    • Ultracentrifugation to isolate lipoprotein fractions (density 1.063--1.21).

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  • Immunological reaction with anti-beta-lipoprotein antiserum.
  • Analysis of electrophoretic mobility and triglyceride content.

    • Main Results:

    • A double beta-lipoprotein pattern was observed, with a slower migrating fraction identified as a high-density lipoprotein (HDL) subfraction.
    • This HDL subfraction migrated to the 'midband L.1' position and reacted with anti-beta-lipoprotein antiserum.
    • The abnormal lipoprotein had higher triglyceride content than usual beta-lipoprotein and was poorly detected by paper electrophoresis.
    • Affected individuals were heterozygous for an autosomal dominant gene.

    Conclusions:

    • The study identified a novel HDL subfraction presenting as a double beta-lipoprotein, associated with an autosomal dominant genetic trait.
    • Despite potential associations in other reports, this specific lipoprotein variant showed no correlation with premature ischemic heart disease in the observed family.
    • Further research is warranted to understand the broader implications of this unique lipoprotein phenotype.