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Related Experiment Videos

Lipid synthesis in cutaneous xanthoma

C H Hu, R D Ellefson, R K Winkelmann

    The Journal of Investigative Dermatology
    |August 1, 1982
    PubMed
    Summary

    Xanthoma tissue demonstrates significant in vitro lipid synthesis, regardless of patient plasma lipid levels. This local lipogenesis contributes to xanthoma composition, alongside potential plasma lipid origins.

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    Area of Science:

    • Biochemistry
    • Dermatology
    • Metabolic Research

    Background:

    • Xanthomas are lipid-rich skin deposits.
    • The origin of lipids in xanthomas, particularly in normolipidemic individuals, requires further investigation.
    • Understanding local lipid synthesis in xanthoma tissue is crucial.

    Purpose of the Study:

    • To investigate in vitro lipogenesis in human xanthoma tissue.
    • To compare lipid synthesis rates between xanthoma tissue and normal skin.
    • To determine if plasma lipid levels influence xanthoma tissue's lipogenic capacity.

    Main Methods:

    • Xanthoma tissue from patients with normal or hyperlipidemia and normal skin were incubated with sodium [14C]acetate.
    • Lipids were extracted and separated.
    • Radioactivity in each lipid class was quantified to measure acetate incorporation.

    Main Results:

    • Xanthoma tissue exhibited significantly higher acetate incorporation into lipids compared to normal skin.
    • No significant difference in 14C incorporation patterns was observed between xanthomas from normolipidemic and hyperlipidemic patients.
    • All major lipid groups showed increased synthesis in xanthoma tissue.

    Conclusions:

    • Xanthoma tissue possesses a substantial capacity for in situ lipid synthesis (lipogenesis).
    • Local lipogenesis is a significant contributor to xanthoma lipid content, irrespective of plasma lipid status.
    • The origin of xanthoma lipids is likely multifactorial, involving both local synthesis and potential plasma-derived lipids.

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