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Related Experiment Videos

Insulin binding to differentiating muscle cell line L6.

N Watanabe, M Kobayashi, M Iwasaki

    Diabetes Research and Clinical Practice
    |September 1, 1986
    PubMed
    Summary

    Glucocorticoids significantly increase insulin binding in L6 muscle cells by upregulating insulin receptors. This suggests a key role for glucocorticoids in modulating insulin sensitivity.

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    Area of Science:

    • Biochemistry
    • Cell Biology
    • Endocrinology

    Background:

    • Insulin resistance is a growing health concern.
    • Understanding insulin receptor regulation is crucial for metabolic research.

    Purpose of the Study:

    • To investigate the effect of glucocorticoids on insulin binding in L6 muscle cells.
    • To explore the role of glucocorticoids in modulating insulin receptor expression.

    Main Methods:

    • Cultured differentiating muscle cell line L6 were used.
    • Cells were incubated with 125I-insulin under various conditions.
    • Insulin binding was measured after preincubation with hydrocortisone or dexamethasone.

    Main Results:

    • Insulin binding reached a plateau after 4 h at 22°C and was optimal at pH 7.8.

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  • Hydrocortisone and dexamethasone significantly increased insulin binding.
  • Glucocorticoid treatment increased insulin-binding sites per cell by 2.5-fold.

    • Conclusions:

    • Glucocorticoids play a significant role in regulating the number of insulin receptors in L6 muscle cells.
    • This finding has implications for understanding insulin resistance and metabolic regulation.