Effects of the three selective NK1, NK2 and NK3 receptor agonists, respectively [Sar9,Met(O2)11]SP (▪), [β-Ala8]neurokinin A (○) and senktide (▴) on PMN adhesion to HUVEC. Incubation time and methods were identical to those selected for SP. Data are expressed as means±s.e.m.; n=7. Statistical analysis established the following significance: P<0.01 vs control for the concentration range of [Sar9,Met(O2)11]SP 10−16–10−13 and 10−11–10−9 M; P<0.01 vs control for [β-Ala8]neurokinin A 10−12–10−10 M.