Summary
The effects of histamine (HA) on prolactin (PRL), ACTH, and cortisol secretion in
human males were investigated. Specific H2-receptor blockade caused an immediate and significant PRL release, while specific
H2-receptor stimulation (HA and mepyramine) was without effect on PRL secretion. HA
significantly stimulated both ACTH and cortisol secretion, and this stimulation was
probably mediated through H2-receptors. H2-receptor blockade caused a late, but significant ACTH release. This release was not
accompanied by a release of cortisol, and might therefore be due to a spontaneous
oscillation in ACTH secretion. The results support the theory that HA acts as a modulator
of human ACTH secretion. A similar effect on PRL secretion as postulated by others
could not be confirmed in this study.
Key-Words:
Histamine
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Ranitidine
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Mepyramine
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Prolactin
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ACTH
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Cortisol