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An intracellular transit iron pool.

A Jacobs

    Ciba Foundation Symposium
    |December 7, 1976
    PubMed
    Summary
    This summary is machine-generated.

    A newly identified cellular iron transit pool is crucial for various iron metabolic processes, including heme synthesis and enzyme activation. This pool

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    Area of Science:

    • Cellular iron metabolism
    • Biochemistry
    • Molecular biology

    Background:

    • Iron is essential for cellular functions, including heme synthesis and enzyme activity.
    • Cellular iron uptake and utilization involve complex transport mechanisms.
    • The precise intracellular pathways for iron trafficking remain incompletely understood.

    Purpose of the Study:

    • To investigate the existence and characteristics of a labile intracellular iron pool.
    • To determine the origin and fate of iron within this proposed pool.
    • To explore the pool's role in cellular iron homeostasis.

    Main Methods:

    • Studies involved various cell types, including reticuloendothelial cells, red blood cell precursors, cultured Chang cells, and liver cells.
    • Iron metabolism was assessed by tracking iron incorporation into ferritin and heme.

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  • The chelation of iron by agents like desferrioxamine was investigated.

    • Main Results:

    • Evidence suggests the presence of a labile intracellular iron pool.
    • This pool serves as a source for heme synthesis, iron-dependent enzymes, ferritin incorporation, and return to transferrin.
    • Iron enters the pool from transferrin, heme breakdown, and ferritin mobilization.
    • The pool is implicated in iron chelation by agents such as desferrioxamine.

    Conclusions:

    • A labile intracellular iron transit pool is proposed to exist.
    • This pool plays a central role in managing intracellular iron availability and distribution.
    • Further characterization of this low molecular weight complex is warranted.