MULTISCREEN™ MEMBRANE PREPARATION
HUMAN RECOMBINANT HISTAMINE H4 RECEPTOR
1 vial (14.66 mg/mL, 1 mg)
20 mM Gly-Gly, 1 mM MgCl2, 25 mM Sucrose (pH 7.2)
Expression vector containing full-length human HRH4 cDNA (GenBank accession number NM_021624.2) with FLAG tag sequence at N-terminus
Store at – 80°C. Avoid repeated freeze-thaw.
Background: Histamine is one of the most studied biomolecules in medicine and is most notably known for its effects on smooth muscle contraction, vascular permeability and regulation of stomach acid. The histamine receptor H4 has been shown to have a role in chemotaxis and mediator release in a variety of immune cells, such as mast cells, eosinophils, dendritic cells, and T cells. The development of potent H4 receptor antagonists has great potential to open up the pathway for new therapeutic treatments in chronic inflammatory diseases, such as bronchial asthma, allergic gastrointestinal disease, and atopic dermatitis.
Figure 1. Histogram showing receptor expression on cell surface measured by flow cytometry (FACS) using an anti-FLAG antibody. Thin line: parental cells; thick line: receptor-expressing cells.
Daugherty (2004) Histamine H4 antagonism: a therapy for chronic allergy?. Br J Pharmacol 142:5-7.
Nguyen et al. (2001) Discovery of a novel member of the histamine receptor family. Mol Pharmacol 59:427-433.