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Perinatal changes in the absorption of trace elements.

C F Mills, N T Davies

    Ciba Foundation Symposium
    |January 16, 1979
    PubMed
    Summary
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    Newborns have unique trace element absorption needs, with efficiency varying by age and diet. Understanding these processes is crucial for preventing deficiencies and managing toxic element exposure in early life.

    Area of Science:

    • Nutritional Science
    • Developmental Biology
    • Toxicology

    Background:

    • Fetal trace element requirements shift significantly during late development.
    • Postnatal vulnerability to trace element deficiencies is linked to fetal reserves, maternal milk composition, and absorption efficiency.
    • Essential and toxic trace element absorption post-birth is age- and diet-dependent.

    Purpose of the Study:

    • To investigate the developmental changes in trace element absorption in newborns and weaned animals.
    • To explore the mechanisms of high absorption efficiency for certain trace elements in the neonatal period.
    • To highlight the gaps in understanding trace metal absorption in weaned animals.

    Main Methods:

    • Review of existing literature on fetal and neonatal trace element metabolism.

    Related Experiment Videos

  • Analysis of studies on the efficiency of trace element absorption in relation to age and diet.
  • Examination of evidence for pinocytotic absorption of trace elements in newborns.
  • Consideration of developmental changes in enterohepatic recirculation of metals.

    • Main Results:

    • Newborns exhibit poorly developed iron absorption regulation.
    • Pinocytotic absorption of iron, copper, lead, and cadmium may occur in neonates, explaining high absorption from liquid diets.
    • Significant developmental changes occur in the absorption and handling of trace elements from birth through weaning.
    • Understanding of trace metal absorption in weaned animals remains inadequate.

    Conclusions:

    • Neonatal trace element absorption is a complex process influenced by developmental stage and diet.
    • Specific mechanisms like pinocytosis contribute to high absorption rates of certain elements in newborns.
    • Further research is needed to fully elucidate trace metal absorption processes, particularly in weaned animals, to ensure adequate nutrition and prevent toxicity.