Leukotriene C4 synthase polymorphisms and responsiveness to leukotriene antagonists in asthma

Airway responsiveness to leukotriene C4 (LTC4), leukotriene E4 (LTE4) and histamine in aspirin-sensitive asthmatic subjects.

We wanted to determine whether the airway response to inhaled leukotriene C4 (LTC4) is similar to inhaled leukotriene E4 (LTE4) in aspirin-sensitive asthma and, therefore, determined airway responsiveness to histamine, LTC4 and LTE4 in seven aspirin-sensitive subjects and 13 control asthmatic subjects, who were tolerant of aspirin. The concentration of inhaled lysine-aspirin which produced a 15...

Role of leukotriene receptor antagonists in asthma.

Asthma is a chronic inflammatory disease that affects >300 million people worldwide. However, inhaled corticosteroids (ICS), the gold standard therapy for persistent asthma, cannot suppress every component of airway inflammation and often fail to adequately penetrate the small airways in order completely suppress eosinophilia. Cysteinyl leukotrienes are important inflammatory factors that are i...

Leukotriene receptor antagonists: useful in acute asthma?

Association of Leukotriene C4 Synthase A-444C Polymorphism with Asthma and Asthma Phenotypes in Romanian Population.

INTRODUCTION Leukotriene C4 synthase (LTC4S) gene -444A/C polymorphism has been implicated in susceptibility to asthma, but a large number of studies have reported inconclusive results. The aim of this study was to investigate the association between the -444A/C polymorphism of LTC4S gene and asthma, asthma phenotypes (aspirin intolerant/tolerant asthma) and different characteristics of the pat...

Passive sensitization of human airways increases responsiveness to leukotriene C4.

Passive sensitization of human airways in vitro causes increased responsiveness to histamine and induces specific immunoglobulin (Ig)E-dependent contractile responsiveness to allergen. Leukotrienes (LTs) and, to a lesser extent, histamine are the major mediators of allergen-induced contraction. Since it is unclear whether passively sensitized airways are also hyperresponsive to cysteinyl leukot...