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Familial amyloid polyneuropathy.

A H Koeppen, E J Mitzen, M B Hans

    Muscle & Nerve
    |November 1, 1985
    PubMed
    Summary
    This summary is machine-generated.

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    Familial amyloid polyneuropathy involves abnormal transthyretin protein deposits in tissues. This study identifies these amyloid fibrils as altered transthyretin, distinct from the normal form.

    Area of Science:

    • Cardiovascular Research
    • Neurology
    • Protein Biochemistry

    Background:

    • Familial amyloid polyneuropathy (FAP) is a progressive disease characterized by amyloid fibril deposition.
    • The specific protein composition of amyloid fibrils in FAP with cardiomyopathy remains incompletely understood.

    Observation:

    • Amyloid fibrils were isolated from the myocardium of FAP patients.
    • The isolated amyloid protein showed similarities but also distinct differences compared to normal human serum prealbumin (transthyretin).

    Findings:

    • Amyloid fibrils contained peptide fragments of transthyretin and fibronectin.
    • Antiserum against the isolated amyloid protein effectively stained tissue amyloid, unlike commercial antitransthyretin antibodies.
    • The amyloid protein lacked amyloid P component.

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    Implications:

    • These findings suggest that FAP with cardiomyopathy results from the infiltration of tissues by an abnormal form of transthyretin.
    • The study highlights the importance of using specific antibodies for accurate amyloid detection in FAP research.