title: Treatment of allergic asthma by targeting janus kinase 3-dependent leukotriene synthesis in mast cells with 4-(3', 5'-dibromo-4'-hydroxyphenyl)amino-6,7-dimethoxyquinazoline (WHI-P97).
abstract: 4-(3',5'-Dibromo-4'-hydroxyphenyl)amino-6,7-dimethoxyquinazoline (WHI-P97) is a rationally designed potent inhibitor of Janus kinase (JAK)-3. Treatment of mast cells with WHI-P97 inhibited the translocation of 5-lipoxygenase (5-LO) from the nucleoplasm to the nuclear membrane and consequently 5-LO-dependent leukotriene (LT) synthesis after IgE receptor/FcepsilonRI crosslinking by >90% at low micromolar concentrations. WHI-P97 did not directly inhibit the enzymatic activity of 5-LO, but prevented its translocation to the nuclear membrane without affecting the requisite calcium signal. WHI-P97 was very well tolerated in mice, with no signs of toxicity at dose levels ranging from 5 microg/kg to 50 mg/kg, and LD(10) was not reached at a 50 mg/kg dose level when administered as a single i. p. or i.v. bolus dose. Therapeutic WHI-P97 concentrations, which inhibit mast cell leukotriene synthesis in vitro, could easily be achieved in vivo after the i.v. or i.p. administration of a single nontoxic 40 mg/kg bolus dose of WHI-P97. Notably, WHI-P97 showed promising biological activity in a mouse model of allergic asthma at nontoxic dose levels. Treatment of ovalbumin-sensitized mice with WHI-P97 prevented the development of airway hyper-responsiveness to methacholine in a dose-dependent fashion. Furthermore, WHI-P97 inhibited the eosinophil recruitment to the airway lumen after the ovalbumin challenge in a dose-dependent fashion. Further development of WHI-P97 may therefore provide the basis for new and effective treatment as well as prevention programs for allergic asthma in clinical settings.
authors.affiliation: Department of Allergy and Inflammatory Diseases, Parker Hughes Institute, St. Paul, Minnesota, USA.
authors.forename: R
authors.initials: R
authors.lastname: Malaviya
authors.forename: C L
authors.initials: CL
authors.lastname: Chen
authors.forename: C
authors.initials: C
authors.lastname: Navara
authors.forename: R
authors.initials: R
authors.lastname: Malaviya
authors.forename: X P
authors.initials: XP
authors.lastname: Liu
authors.forename: M
authors.initials: M
authors.lastname: Keenan
authors.forename: B
authors.initials: B
authors.lastname: Waurzyniak
authors.forename: F M
authors.initials: FM
authors.lastname: Uckun
mesh_terms: D000818:Animals; D018927:Anti-Asthmatic Agents / Q000493:pharmacokinetics / Q000494:pharmacology*; D001094:Arachidonate 5-Lipoxygenase / Q000378:metabolism; D016718:Arachidonic Acid / Q000378:metabolism; D000001:Calcimycin / Q000494:pharmacology; D004791:Enzyme Inhibitors / Q000494:pharmacology*; D004804:Eosinophils / Q000187:drug effects / Q000502:physiology; D005260:Female; D053616:Janus Kinase 3; D017997:Leukotriene C4 / Q000096:biosynthesis*; D008297:Male; D008407:Mast Cells / Q000187:drug effects* / Q000378:metabolism; D051379:Mice; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D016513:Mice, SCID; D011505:Protein-Tyrosine Kinases / Q000037:antagonists & inhibitors* / Q000502:physiology; D011799:Quinazolines / Q000493:pharmacokinetics / Q000494:pharmacology*; D017455:Receptors, IgE / Q000502:physiology
chemical_list: D018927:Anti-Asthmatic Agents; D004791:Enzyme Inhibitors; D011799:Quinazolines; D017455:Receptors, IgE; C416931:WHI P97; D016718:Arachidonic Acid; D017997:Leukotriene C4; D000001:Calcimycin; D001094:Arachidonate 5-Lipoxygenase; D011505:Protein-Tyrosine Kinases; C507935:Jak3 protein, mouse; D053616:Janus Kinase 3