Jan 1, 1989

Histamine and atopic eczema

Acta Dermato-venereologica. Supplementum
J Ring, P Thomas


Apart from increased production of immunoglobulin E antibodies and disturbed T-cell regulation, altered patterns of releasability of vasoactive mediators have been described in patients with atopic eczema. The best studied substance is histamine which is a classical inducer of pruritus in man. Elevated concentrations of histamine have been found in vivo in the skin and in the plasma of patients with atopic eczema especially during exacerbation of the disease. Similar findings have been described for other atopic diseases as extrinsic bronchial asthma. Histamine acts via characteristic receptors; symptoms as itch, wheal formation, mucus production, contraction of smooth muscle, tachycardia H2-effects include acid secretion in the stomach as well as the development of flush and itch reactions, blood pressure changes and cardiac arrhythmia. Of special interest is an inhibitory effect of histamine on lymphocyte reactions mediated via a H2-receptor. The existence of a new H3-receptor in the brain serving as autocrine feed-back inhibitor of histaminergic neurones has been established in the rat but not yet in man. In vitro an increased histamine releasability of peripheral leukocytes has been found after stimulation with a variety of...Continue Reading

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Mentioned in this Paper

Dermatitis, Atopic
Eczema, Infantile
Cardiac Arrhythmia
Histamine Release
Histamine Antagonists

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