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Hypothalamic-pituitary-adrenal axis and immune system

S Savastano1, A P Tommaselli, R Valentino

  • 1Chair of Endocrinology, C.E.O.S. National Research Council (CNR), Italy.

Acta Neurologica
|August 1, 1994
PubMed
Summary
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The hypothalamic-pituitary-adrenal (HPA) axis and immune system (IS) interact bidirectionally. This complex relationship is crucial in stress, aging, and diseases like HIV, impacting immune function and HPA regulation.

Area of Science:

  • Neuroendocrinology
  • Immunology
  • Physiology

Background:

  • The hypothalamic-pituitary-adrenal (HPA) axis and immune system (IS) exhibit complex, bidirectional interactions.
  • Evidence supports a physiological role for the HPA axis-immune system network in vivo and in vitro.

Observation:

  • Hormones from the HPA axis, like glucocorticoids (GC), have direct effects on IS functions under physiological conditions.
  • Soluble mediators from the IS influence HPA axis regulation at multiple steps in both health and disease.

Findings:

  • Stress and aging highlight the HPA axis-IS network's importance, often showing coexistent HPA activation and IS impairment.
  • HIV infection is associated with HPA axis abnormalities, including a reported case of Cushing's syndrome in an AIDS-related complex patient.

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Implications:

  • Understanding the HPA axis-IS interplay is vital for comprehending physiological and pathological conditions.
  • Further research into this network may reveal therapeutic targets for immune and neuroendocrine disorders.