Targeting 5-lipoxygenase-activating protein in asthma and chronic obstructive pulmonary disease.

INTRODUCTION: In asthma and chronic obstructive pulmonary disease (COPD), there is an unmet therapeutic need for the anti-inflammatory therapies, and the identification of therapeutic targets and potent corresponding therapies is necessary. Although inhaled corticosteroids and leukotriene modifiers are most effective in asthma they are still not always capable of appropriately controlling the disease. In COPD, the therapeutic gap is even larger because inhaled corticosteroids and other anti-inflammatory therapies are not beneficial in all disease subsets. AREAS COVERED: The role of the 5-lipoxygenase-activating protein (FLAP) in generating proinflammatory molecules such as leukotrienes is discussed, highlighting, in particular, its potential as a therapeutic target in asthma and COPD. The preclinical data on FLAP inhibitors are discussed. The clinical data on the FLAP inhibitors investigated so far for these diseases are analyzed. EXPERT OPINION: FLAP inhibitors have emerged during the past decade as a promising therapeutic class in asthma and COPD, but there exists only a limited amount of data supporting their efficacy in these diseases. This might be due to the fact that the development of some of the molecules discussed was abandoned. Such therapies might be of particular interest in COPD and in asthma-COPD overlap syndrome.