All are functions of leukotrienes except:

Satyanarayan -562 Leukotrienes are implicated in asthma, inflammatory reactions, hypersensitivity and heart attacks. Leukotrienes cause contraction of smooth muscles, bronchoconstriction, vasoconstriction, adhesion of white blood cells and release of lysosomal enzymes. Lipoxins are involved in vasoactive, and immunoregulatory functions. There is a strong evidence to support that lipoxins act as counter regulatory compounds of immune response.