title: Symmetrical bis(heteroarylmethoxyphenyl)alkylcarboxylic acids as inhibitors of leukotriene biosynthesis.
abstract: Symmetrical bis(quinolylmethoxyphenyl)alkylcarboxylic acids were investigated as inhibitors of leukotriene biosynthesis and 4, 4-bis(4-(2-quinolylmethoxy)phenyl)pentanoic acid sodium salt (47.Na) met our design parameters for a drug candidate (ABT-080). This compound was readily synthesized in three steps from commercially available diphenolic acid. Against intact human neutrophils, 47.Na inhibited ionophore-stimulated LTB(4) formation with an IC(50) = 20 nM. In zymosan-stimulated mouse peritoneal macrophages producing both LTC(4) and PGE(2), 47.Na showed 9000-fold selectivity for inhibition of LTC(4) (IC(50) = 0.16 nM) over PGE(2) (IC(50) = 1500 nM). Preliminary pharmacokinetic evaluation in rat and cynomolgus monkey demonstrated good oral bioavailability and elimination half-lives of 9 and 5 h, respectively. Pharmacological evaluation of leukotriene inhibition with oral dosing was demonstrated in a rat pleural inflammation model (ED(50) = 3 mg/kg) and a rat peritoneal passive anaphylaxis model (LTB(4), ED(50) = 2.5 mg/kg; LTE(4), ED(50) = 1.0 mg/kg). In a model of airway constriction induced by antigen challenge in actively sensitized guinea pigs, 47.Na dosed orally blocked bronchoconstriction with an ED(50) = 0.4 mg/kg, the most potent activity we have observed for any leukotriene inhibitor in this model. The mode of inhibitory action of 47.Na occurs at the stage of 5-lipoxygenase biosynthesis as it blocks both leukotriene pathways leading to LTB(4) and LTC(4) but not PGH(2) biosynthesis. However, 47.Na does not inhibit 5-lipoxygenase catalysis in a broken cell enzyme assay; therefore it is likely that 47.Na acts as a FLAP inhibitor.
authors.affiliation: Immunoscience Research, Abbott Laboratories, D41K, R13-4, 1401 Sheridan Road, North Chicago, Illinois 60064, USA.
authors.forename: T
authors.initials: T
authors.lastname: Kolasa
authors.forename: D E
authors.initials: DE
authors.lastname: Gunn
authors.forename: P
authors.initials: P
authors.lastname: Bhatia
authors.forename: A
authors.initials: A
authors.lastname: Basha
authors.forename: R A
authors.initials: RA
authors.lastname: Craig
authors.forename: A O
authors.initials: AO
authors.lastname: Stewart
authors.forename: J B
authors.initials: JB
authors.lastname: Bouska
authors.forename: R R
authors.initials: RR
authors.lastname: Harris
authors.forename: K I
authors.initials: KI
authors.lastname: Hulkower
authors.forename: P E
authors.initials: PE
authors.lastname: Malo
authors.forename: R L
authors.initials: RL
authors.lastname: Bell
authors.forename: G W
authors.initials: GW
authors.lastname: Carter
authors.forename: C D
authors.initials: CD
authors.lastname: Brooks
mesh_terms: D000284:Administration, Oral; D000707:Anaphylaxis / Q000378:metabolism; D000818:Animals; D001992:Bronchoalveolar Lavage Fluid / Q000166:cytology; D016084:Bronchoconstriction / Q000187:drug effects; D002264:Carboxylic Acids / Q000138:chemical synthesis* / Q000737:chemistry / Q000493:pharmacokinetics / Q000494:pharmacology; D004353:Drug Evaluation, Preclinical; D004804:Eosinophils / Q000473:pathology; D006168:Guinea Pigs; D006801:Humans; D066298:In Vitro Techniques; D020024:Leukotriene Antagonists / Q000138:chemical synthesis* / Q000737:chemistry / Q000493:pharmacokinetics / Q000494:pharmacology; D007975:Leukotriene B4 / Q000037:antagonists & inhibitors / Q000096:biosynthesis; D008168:Lung / Q000473:pathology; D008252:Macaca fascicularis; D051379:Mice; D009504:Neutrophils / Q000378:metabolism; D010421:Pentanoic Acids / Q000138:chemical synthesis* / Q000737:chemistry / Q000493:pharmacokinetics / Q000494:pharmacology; D010537:Peritoneum / Q000378:metabolism; D010998:Pleurisy / Q000139:chemically induced / Q000188:drug therapy; D011804:Quinolines / Q000138:chemical synthesis* / Q000737:chemistry / Q000493:pharmacokinetics / Q000494:pharmacology; D051381:Rats; D013329:Structure-Activity Relationship
chemical_list: C413351:ABT 080; D002264:Carboxylic Acids; D020024:Leukotriene Antagonists; D010421:Pentanoic Acids; D011804:Quinolines; D007975:Leukotriene B4