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Related Experiment Videos

Copper transport

M C Linder1, L Wooten, P Cerveza

  • 1Department of Chemistry and Biochemistry, and the Institute for Molecular Biology and Nutrition, California State University, Fullerton 92834-6866, USA. mlinder@fullerton.edu

The American Journal of Clinical Nutrition
|May 20, 1998
PubMed
Summary
This summary is machine-generated.

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Dietary copper absorption in humans is about 1 mg daily, with most copper recirculating. Newly absorbed copper travels to tissues in two phases, primarily via plasma proteins like ceruloplasmin.

Area of Science:

  • Human physiology
  • Trace element metabolism
  • Nutritional biochemistry

Background:

  • Dietary copper absorption is crucial for human health, with approximately 1 mg absorbed daily.
  • Endogenous copper also enters the gastrointestinal tract, with most being reabsorbed, highlighting complex copper homeostasis.

Purpose of the Study:

  • To elucidate the transport pathways and tissue distribution of newly absorbed dietary copper in adult humans.
  • To investigate the role of plasma proteins, particularly ceruloplasmin, in copper transport.
  • To examine copper distribution in various body fluids and its presence in milk.

Main Methods:

  • The study describes copper absorption and transport based on existing physiological knowledge and literature.
  • It details the two-phase transport of absorbed copper from the intestine to tissues.

Related Experiment Videos

  • It discusses the role of plasma protein carriers like albumin, transcuprein, and ceruloplasmin.

    • Main Results:

    • Newly absorbed copper is transported in two phases: intestine to liver/kidney, then liver/kidney to other organs, with ceruloplasmin involvement.
    • Copper also circulates in other body fluids, including cerebrospinal and amniotic fluid, with ceruloplasmin potentially aiding transport.
    • Milk copper and ceruloplasmin concentrations vary with lactation, and milk-derived copper is highly absorbable in rats.

    Conclusions:

    • Copper absorption and distribution involve intricate multi-phase transport mechanisms.
    • Ceruloplasmin plays a significant role in systemic and potentially specialized fluid copper transport.
    • Lactational stage influences milk copper content and bioavailability, suggesting specific nutritional roles.