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FLAP (Arachidonate 5-lipoxygenase-activating protein) is a protein that in humans is encoded by the ALOX5AP gene. FLAP is necessary for the activation of 5-lipoxygenase and therefore for the production of leukotrienes. It is an integral protein within the nuclear membrane. FLAP is necessary in synthesis of leukotriene, which are lipid mediators of inflammation that is involved in respiratory and cardiovascular diseases. FLAP functions as a membrane anchor for 5-lipooxygenase and as an amine acid-bind protein. Gene polymorphisms in FLAP are suspected of playing a role in Alzheimer's disease. Leukotrienes, which need the FLAP protein to be made, have an established pathological role in allergic and respiratory diseases. Animal and human genetic evidence suggests they may also have an important role in atherosclerosis, myocardial infarction, and stroke. The structure of FLAP provides a tool for the development of novel therapies for respiratory and cardiovascular diseases and for the design of focused experiments to probe the cell biology of FLAP and its role in leukotriene biosynthesis.

Cat. No. Product Name CAS No. Information
H9180

Diflapolin

724453-98-9

Diflapolin is a highly active dual 5-lipoxygenase-activating protein (FLAP)/soluble epoxide hydrolase (sEH) inhibitor with marked anti-inflammatory efficacy and high target selectivity; Diflapolin inhibits 5-LOX product formation in intact human monocytes and neutrophils with IC50s of  30 and 170 nM, respectively, and suppressed the activity of isolated sEH (IC50=20 nM).

H3988

Quiflapon sodium

147030-01-1

A potent, orally active leukotriene biosynthesis inhibitor that acts by inhibiting 5-lipoxygenase activating protein (FLAP) with IC50 of 1.6 nM in a FLAP binding assay; inhibits leukotriene (LT) biosynthesis in intact human and elicited rat PMNLs with IC50 of 3.1 nM and 6.1 nM, respectively; inhibits the systemic generation of peptidoleukotrienes as measured by urinary LTE4 excretion in dogs (ED50=1 mg/kg).

H3987

MK-0591

136668-42-3

A potent, specific and orally active 5-Lipoxygenase-activating protein (FLAP) inhibitor with IC50 of 1.6 nM in FLAP binding assay; has no inhibitory effect on 15-lipoxygenase and platelet 12-lipoxygenase and cyclooxygenase in human PMNLs; potently inhibits leukotriene (LT) biosynthesis in intact human and elicited rat PMNLs with IC50 of 3.1 and 6.1 nM, respectively; inhibits excretion of LTE4 in antigen-challenged allergic animal models.

H3986

GSK2190915 sodium

1196070-26-4

A potent, selective FLAP inhibitor with binding IC50 of 2.6 nM; inhibits LTB4 synthesis following ionophore challenge in human whole blood with IC50 of 76 nM (5 h incubation); shows good selectivity over CYP3A4, 2C9, and 2D6; exhibits excellent preclinical toxicology, pharmacokinetics and oral bioactivity.

H3985

GSK2190915

936350-00-4

A potent, selective FLAP inhibitor with binding IC50 of 2.6 nM; inhibits LTB4 synthesis following ionophore challenge in human whole blood with IC50 of 76 nM (5 h incubation); shows good selectivity over CYP3A4, 2C9, and 2D6; exhibits excellent preclinical toxicology, pharmacokinetics and oral bioactivity.

H3984

BI 665915

1360550-04-4

BI 665915 is a highly potent, selective, orally active 5-lipoxygenase-activating protein (FLAP) inhibitor with binding IC50 of 1.7 nM; displays no activity against other enzymes and receptors in the leukotriene pathway such as 5-LO, COX-1 and -2, phospholipase A2, LTA4 hydrolase, BLT1, and BLT2 (IC50s>10 uM); shows functional inhibition of LTB4 production in human whole blood (IC50=45 nM); demonstrates a dose-dependent DMPK relationship and inhibition of LTB4 production in vivo.

H3983

AZD5718

2041075-86-7

AZD5718 (Atuliflapon,AZD-5718, AZD 5718) is a novel potent 5-lipoxygenase activating protein (FLAP) inhibitor with binding IC50 of 6.3 nM; exhibits LTB4 inhibition in human whole blood assays with IC50 of 39 nM; reduce the production of pro-inflammatory and vasoactive leukotrienes both in vitro and in vivo.

H3981

ABT-080

189498-57-5

ABT-080 is a potent FLAP inhibitor that inhibits ionophore-stimulated LTB(4) formation with with IC50 of 20 nM; selectively inhibits zymosan-stimulated mouse peritoneal macrophages producing LTC(4) with IC50 of 0.16 nM, 9000-fold selectivity over PGE(2) producing; demonstrates leukotriene inhibition with oral dosing in a rat pleural inflammation model.

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