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Related Experiment Videos

Isoferritins in normal leucocytes.

B M Jones, M Worwood, A Jacobs

    British Journal of Haematology
    |September 1, 1983
    PubMed
    Summary
    This summary is machine-generated.

    Human leukocytes contain diverse ferritin types, with heart-type ferritin significantly higher in monocytes and lymphocytes than spleen-type. Conventional serum ferritin assays may underestimate levels due to varied isoferritins.

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    Area of Science:

    • Immunology
    • Hematology
    • Biochemistry

    Background:

    • Ferritin is an iron-storage protein crucial for cellular iron homeostasis.
    • Different ferritin isoferritins exist, varying in tissue distribution and subunit composition (H and L).
    • Previous studies primarily focused on liver and spleen ferritin, potentially overlooking other cell types.

    Purpose of the Study:

    • To quantify heart and spleen ferritin concentrations in human peripheral blood leukocytes.
    • To investigate the synthesis of ferritin subunits in mononuclear cells.
    • To assess the implications of leukocyte isoferritins for conventional serum ferritin assays.

    Main Methods:

    • Separation of monocytes, lymphocytes, and polymorphs from human peripheral blood.
    • Quantification of heart and spleen ferritin using specific antibodies.

    Related Experiment Videos

  • Anion exchange chromatography of cell extracts.
  • Analysis of ferritin subunit synthesis via 3H-leucine incorporation.

    • Main Results:

    • Monocytes exhibited the highest heart-type ferritin concentration (38.4 fg/cell), followed by lymphocytes (8.6 fg/cell) and polymorphs (3.2 fg/cell).
    • Spleen-type ferritin was also detected, with monocytes showing the highest levels (15.6 fg/cell).
    • Heart-type ferritin eluted differently from spleen-type during chromatography, indicating distinct properties. Mononuclear cells synthesized both H and L ferritin subunits.

    Conclusions:

    • Human leukocytes contain a diverse array of ferritin isoferritins, with significant differences in heart and spleen ferritin levels across cell types.
    • The presence of various isoferritins suggests that standard serum ferritin assays, often using antibodies against liver or spleen ferritin, may underestimate total ferritin levels.
    • Further research is needed to understand the functional implications of different leukocyte ferritin types in health and disease.