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Cytokines and the hypothalamic-pituitary-adrenal axis
1Department of Medicine, University of Nijmegen, The Netherlands.
The Journal of Steroid Biochemistry and Molecular Biology
|December 20, 1990
Summary
Cytokines like interleukin 1 (IL1) and tumor necrosis factor (TNF) elevate glucocorticoids by activating the hypothalamic-pituitary unit. These immune signaling molecules also impact thyroid and gonadal function, affecting hormone secretion during immune responses.
Area of Science:
- Endocrinology
- Immunology
- Neuroendocrinology
Background:
- Cytokines are key mediators of immune responses.
- Immune system activation can lead to significant physiological changes.
- Hormonal alterations are observed during infectious diseases and immune stimulation.
Purpose of the Study:
- To investigate the effects of specific cytokines on hormone secretion.
- To explore the role of cytokines in neuroendocrine regulation.
- To understand cytokine-mediated alterations in the hypothalamic-pituitary axis.
Main Methods:
- Administration of cytokines (IL1, TNF, IL2, IL6) to laboratory animals and humans.
- In vitro studies on rat adrenocortical and renal cortical cells.
- Assessment of plasma hormone levels and hypothalamic-pituitary function.
Main Results:
- Interleukin 1 (IL1) and tumor necrosis factor (TNF) increased plasma glucocorticoids via hypothalamic-pituitary activation.
- IL1 and TNF inhibited aldosterone production and stimulated renin release.
- IL1 and TNF suppressed hypothalamic-pituitary-thyroid function; IL1 interfered with gonadotropin and sex steroid secretion.
Conclusions:
- Cytokines significantly influence the endocrine system, particularly the hypothalamic-pituitary-adrenal axis.
- Cytokines play a role in neuroendocrine responses to immune system stimulation.
- Further research is needed to fully establish the role of cytokines in hormone alterations during immune challenges.