CS-003

CS-003 is a triple neurokinin receptor antagonist with activity in inhibiting neurokinin-related respiratory diseases. CS-003 exhibits high affinity for human neurokinin 1, 2 and 3 receptors, withKi values of 2.3 nM, 0.54 nM and 0.74 nM respectively. The Ki values of CS-003 on the guinea pig neurokinin receptor are 5.2 nM, 0.47 nM and 0.71 nM respectively, showing superior inhibitory effect. CS-003 significantly inhibits the formation of inositol phosphate involving substance P, neurokinin A and neurokinin B through competitive antagonism. CS-003 significantly inhibits citric acid-induced cough, and its effect is better than other selective neurokinin receptor antagonists[1].