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The status of the corticotropin releasing factor (CRF)

M Saffran, A V Schally

    Neuroendocrinology
    |January 1, 1977
    PubMed

    Insights

    Early research suggested multiple factors release adrenocorticotropic hormone (ACTH). This review revisits the evidence for various ACTH-releasing agents, challenging the long-held neurohumoral theory of a single hypothalamic controller.

    Area of Science:

    • Endocrinology
    • Neuroendocrinology
    • Physiology

    Background:

    • Historical research on adrenocorticotropic hormone (ACTH) release indicated multiple influencing factors.
    • The neurohumoral theory proposed a unique hypothalamic agent for each pituitary hormone, guiding ACTH research for two decades.
    • A singular focus on identifying a unique ACTH-releasing hormone dominated early studies.

    Purpose of the Study:

    • To re-examine the scientific evidence supporting the release of ACTH by multiple factors.
    • To challenge the established neurohumoral theory's premise of a single hypothalamic controlling agent for ACTH.
    • To provide a comprehensive review of the historical and current perspectives on ACTH regulation.

    Main Methods:

    • Literature review of early and contemporary studies on ACTH release.
    • Analysis of historical data and theoretical frameworks in neuroendocrinology.
    • Synthesis of evidence regarding the multiplicity of factors influencing ACTH secretion.

    Main Results:

    • Evidence suggests that ACTH release is not solely regulated by a single hypothalamic factor.
    • The historical search for a unique ACTH-releasing hormone may have overlooked the complexity of the system.
    • Multiple hypothalamic and extra-hypothalamic factors likely contribute to ACTH regulation.

    Conclusions:

    • The regulation of ACTH release is more complex than previously assumed by the singular neurohumoral theory.
    • Revisiting the evidence supports the hypothesis of multiple factors controlling ACTH secretion.
    • Future research should focus on elucidating the interplay of various agents in ACTH regulation.

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