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Pulsatile adrenocorticotropic hormone: an overview

A Gudmundsson1, M Carnes

  • 1Geriatric Research, Education and Clinical Center, William S Middleton Memorial Veterans Hospital, Madison, WI 53705, USA.

Biological Psychiatry
|February 1, 1997
PubMed
Summary
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Pulsatile adrenocorticotropic hormone (ACTH) secretion shows significant inter-individual variability. Understanding ACTH pulse dynamics is crucial for comprehending the hypothalamic-pituitary-adrenocortical (HPA) axis and its role in adaptation.

Area of Science:

  • Neuroendocrinology
  • Hormone Physiology

Background:

  • Adrenocorticotropic hormone (ACTH) is released in pulsatile bursts from corticotrophic cells.
  • Hormone pulsatility is a fundamental characteristic of neuroendocrine systems.
  • The hypothalamic-pituitary-adrenocortical (HPA) axis is vital for adaptation and survival.

Purpose of the Study:

  • To review the literature on pulsatile ACTH secretion.
  • To address fundamental aspects of hormone pulsatility.
  • To identify key themes in ACTH secretion patterns.

Main Methods:

  • Systematic review of 51 studies.
  • Analysis of plasma ACTH measurements at intervals of 20 minutes or less.

Main Results:

Related Experiment Videos

  • Observed marked inter-individual variability in ACTH patterns.
  • Highlighted the dependence of pulse identification on sampling frequency.
  • Noted similarities in ACTH pulse amplitude and frequency across species.
  • Identified amplitude changes as predominant over frequency changes in altered physiological states.

    • Conclusions:

    • Modulating ACTH signal shape may be key for transmitting complex information to target cells.
    • Temporal alterations in ACTH secretion hold clinical and neurobiological significance.
    • Further investigation into the significance of ACTH temporal dynamics is warranted.