SUN 1334H

SUN 1334H is a potent, orally active, highly selective H1 receptor antagonist, with Ki of 9.7 nM.

Signaling Pathways >> GPCR/G Protein >> Histamine Receptor

Signaling Pathways >> Immunology/Inflammation >> Histamine Receptor

Research Areas >> Inflammation/Immunology

Ki: 9.7 nM (H1 receptor)[1]

SUN-1334H causes potent inhibition of histamine induced contractions of isolated guinea-pig ileum with an IC50 (half the maximal inhibitory concentration) of 0.198 μM. In CHO-K1/hERG cells, SUN-1334H does not modulate hERG K+-currents at concentrations as high as 100 μM[1]. SUN-1334H, cetirizine and hydroxyzine cause comparable inhibition of NLF leukocytes, IL-4 and total protein concentrations[2].

SUN-1334H potently inhibits histamine-induced bronchospasm over 24 hours following oral administration and completely suppresses histamine-induced skin wheal in beagle dogs and ovalbumin-induced rhinitis in guinea pigs[1]. In skin allergy models, SUN-1334H shows potent reduction of passive and active cutaneous anaphylactic reactions. In central nervous system side effects models, SUN-1334H, desloratadine and fexofenadine are devoid of any significant effects[2].

[1]. Mandhane SN, et al. Preclinical efficacy and safety pharmacology of SUN-1334H, a potent orally active antihistamine agent. Drugs R D. 2008;9(2):93-112.

[2]. Mandhane SN, et al. Characterization of anti-inflammatory properties and evidence for no sedation liability for the novel antihistamine SUN-1334H. Int Arch Allergy Immunol. 2010;151(1):56-69.

Loratadine | Histamine | Pitolisant hydrochloride | Cimetidine | Osthole | Clemastine fumarate | Ebrotidine | JNJ-7777120 | Famotidine | Cetirizine Dihydrochloride | Desloratadine | Ketotifen fumarate | Lodoxamide | Meclizine dihydrochloride | Chlorpheniramine maleate