Leukotriene D4 (LTD4) is an active metabolite of LTC4 (Item Nos. 20210 | 10007241) and a constituent of slow-reacting substance of anaphylaxis (SRS-A). It is formed via metabolism of LTC4 by γ-glutamyl transpeptidase. Like LTC4, LTD4 (0.01-0.1 pM) induces contractions in isolated guinea pig parenchymal strips and tracheal spirals. In vivo, LTD4 increases insufflation pressure, a marker of bronchoconstriction, in anesthetized guinea pigs by 100% when administered at a dose of 89 pmol per animal. It also increases vascular permeability in guinea pig skin when administered intradermally at a dose of 0.1 pmol per animal.
LTD4 (Leukotriene D4) is a member of the leukotriene family shown to be a potent contractor of smooth muscle.
ChEBI: A leukotriene that is (7E,9E,11Z,14Z)-icosa-7,9,11,14-tetraenoic acid substituted by a hydroxy group at position 5 (5S) and a L-cysteinylglycinyl group at
position 6 (6R).
Slow reacting substance of anaphylaxis (SRS-A). Potent bronchoconstrictor and mediator of asthmatic and inflammatory processes. Increases cytosolic free Ca2+ in epithelial cells.
