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[Insulin Receptor in human placenta and its function].

T Mori, M Mochizuki, S Tojo

    Nihon Sanka Fujinka Gakkai Zasshi
    |February 1, 1982
    PubMed
    Summary
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    Human placental villi have insulin receptors that increase glucose uptake and glycogen synthesis. Receptor concentration varies with gestational age, impacting placental glucose metabolism.

    Area of Science:

    • Endocrinology
    • Reproductive Biology
    • Metabolic Research

    Context:

    • Investigates the role of insulin signaling in placental function.
    • Examines glucose metabolism and its regulation during pregnancy.
    • Focuses on the human placenta as a model for nutrient transport.

    Purpose:

    • To characterize insulin receptor properties in human placental villi.
    • To determine the relationship between insulin receptor characteristics and glucose uptake/glycogenesis.
    • To assess the influence of gestational age on these parameters.

    Summary:

    • Insulin receptor binding capacity is higher in early placental villi compared to term placenta, with similar binding affinity.
    • Insulin administration in vitro enhances glucose uptake, glycogen content, and glycogen synthetase activity in both early and term placental villi.

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  • Placental glucose uptake and glycogenesis are more pronounced in early gestation, suggesting gestational age-dependent insulin regulation.

    • Impact:

    • Highlights the dynamic nature of insulin receptor expression and function during pregnancy.
    • Provides insights into the mechanisms regulating fetal glucose supply and utilization.
    • Informs potential therapeutic strategies for managing gestational diabetes mellitus.