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The hypothalamic-pituitary-adrenal axis.

C M Feek, D J Marante, C R Edwards

Clinics in Endocrinology and Metabolism

|November 1, 1983

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Anterior pituitary cells produce pro-opiomelanocortin (POMC), which yields adrenocorticotropic hormone (ACTH). N-POMC may amplify ACTH effects and regulate adrenal cell growth, offering insights into corticotrophinoma.

Area of Science:

Endocrinology
Molecular Biology
Cell Biology

Background:

Anterior pituitary corticotrophin cells synthesize pro-opiomelanocortin (POMC).
POMC undergoes post-translational cleavage into ACTH, beta-LPH, and N-POMC.
CRH (corticotropin-releasing hormone) regulates POMC secretion.

Purpose of the Study:

Investigate the role of N-POMC in adrenal steroidogenesis and adrenocortical cell growth.
Discuss the findings in the context of corticotrophinoma pathophysiology.
Highlight the clinical utility of plasma ACTH measurements.

Main Methods:

In vivo and in vitro experiments were conducted.
Analysis of POMC precursor processing and peptide functions.
Clinical case discussions and monitoring strategies.

Related Experiment Videos

Main Results:

N-POMC may act as a prohormone amplifier for ACTH-induced adrenal steroidogenesis.
N-POMC may regulate adrenocortical cell growth.
CRH controls POMC secretion.

Conclusions:

The primary defect in corticotrophinoma appears to be at the anterior pituitary cell level.
Trans-sphenoidal microsurgery is an effective treatment for corticotrophinoma.
Plasma ACTH level estimation is valuable for monitoring Addison's disease and congenital adrenal hyperplasia.