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Related Experiment Videos

Further characterization of amyloid-enhancing factor

M A Axelrad, R Kisilevsky, J Willmer

    Laboratory Investigation; a Journal of Technical Methods and Pathology
    |August 1, 1982
    PubMed
    Summary
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    Amyloid-enhancing factor (AEF) accelerates amyloid deposition in mice. This transferable activity, induced by azocasein or silver nitrate, localizes to spleen and liver tissues.

    Area of Science:

    • Biochemistry
    • Immunology
    • Pathology

    Background:

    • Amyloid deposition is a hallmark of various diseases.
    • Amyloid-enhancing factor (AEF) is a known accelerator of amyloid formation.
    • Understanding AEF's properties is crucial for developing therapeutic strategies.

    Purpose of the Study:

    • To characterize the properties and behavior of Amyloid-enhancing factor (AEF).
    • To investigate the induction and localization of AEF.
    • To determine the molecular characteristics of the active AEF component.

    Main Methods:

    • Induction of AEF in CBA/J mice using azocasein or silver nitrate.
    • Intravenous administration of AEF and assessment of splenic amyloid deposition.
    • Subcellular fractionation of liver tissue to identify AEF-containing organelles.

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  • Solubilization in 4 M glycerol and Sepharose 4B chromatography.
  • Disc electrophoresis for tentative identification of the active component.

    • Main Results:

    • AEF significantly reduced splenic amyloid deposition induction time to 48 hours.
    • Azocasein or silver nitrate induced AEF in spleen and liver, with activity found in liver subcellular organelles.
    • Intravenous AEF administration localized to spleen perifollicular areas and liver Kupffer cells.
    • AEF activity persisted for at least 4 weeks.
    • AEF was solubilized in 4 M glycerol, was high molecular weight, and distinct from amyloid A protein and serum amyloid P component.

    Conclusions:

    • AEF is a transferable factor that accelerates amyloid deposition.
    • AEF possesses adherent properties and specific tissue localization.
    • The active component of AEF is a high molecular weight entity, not amyloid A or SAP.