Histamine structure. Image source: Wikipedia.
Histamine H3 receptors (H3R) is localized around submucosal glands. H3R plays an important role in the secretion of submucosal glands in the nose.
The seminal work on histamine was published in 1910, but histamine was not identified as a mediator of anaphylactic reactions until 1932. Histamine is a major mediator responsible for the symptoms of allergic rhinitis, with its activities mediated through 4 G protein-coupled receptors. Most of histamine's effects are exerted through the H₁ receptor, but some effects are through the H₂ and H₃ receptors, and possibly also through the H₄ receptor.
References:
Localization and function of histamine H3 receptor in the nasal mucosa. S. Suzuki, K. Takeuchi and Y. Majima. Clinical & Experimental Allergy. Volume 38 Issue 9, Pages 1476 - 1482.
The basics of histamine biology. Lieberman P. Ann Allergy Asthma Immunol. 2011 Feb;106(2 Suppl):S2-5. Epub 2010 Sep 16.
Mast Cells and Basophils. Allergy Cases.
H(3) receptor antagonist is a new therapeutic strategy for allergic rhinitis, trials are ongoing. JACI, 2012.
No comments:
Post a Comment