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Related Experiment Videos

beta-Endorphin and beta-MSH in human plasma.

L McLoughlin, P J Lowry, S Ratter

    Clinical Endocrinology
    |March 1, 1980
    PubMed
    Summary

    This study confirms the presence of beta-endorphin in human plasma. Researchers identified this peptide using chromatography and immunoassay in patients with high ACTH and LPH levels.

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    Area of Science:

    • Endocrinology
    • Neuroscience
    • Biochemistry

    Background:

    • Beta-endorphin is a key endogenous opioid peptide involved in pain and stress responses.
    • Its presence and stability in human plasma are crucial for understanding physiological and pathological conditions.

    Purpose of the Study:

    • To determine if a peptide exhibiting the characteristics of beta-endorphin is present in human plasma.
    • To investigate the conditions under which beta-endorphin might be generated or detected in plasma samples.

    Main Methods:

    • Direct chromatography was employed to isolate and analyze plasma peptides.
    • Conditions were optimized to minimize the degradation or transformation of beta-lipotropin (beta-LPH) into beta-endorphin and beta-melanocyte-stimulating hormone (beta-MSH).
    • Immunological assays were used to detect beta-endorphin immunoreactivity.

    Main Results:

    • A peptide with beta-endorphin immunoreactivity was consistently detected.
    • This peptide eluted at the expected position for beta-endorphin on gel chromatography.
    • Beta-MSH was detected in only one patient with ectopic ACTH syndrome, suggesting specific origins.

    Conclusions:

    • Human plasma contains a peptide with the properties of beta-endorphin.
    • The presence of this peptide is associated with elevated levels of ACTH and LPH.
    • Further research can explore the physiological significance of plasma beta-endorphin.

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