In competitive radioligand binding assays, MEN 10207 (the IC50 ranges of 21-54 nM) has high affinity in bovine stomach membranes and SKLKB82#3 cells, a murine fibroblast cell line transfected with a cDNA encoding for the bovine NK2 receptor[3].
but not Substance P in a dose-dependent manner. And MEN 10207 also effectively blocks the long-term reflex facilitation to the gastrocnemius nerve stimulation[1].
References:
[1]. X J Xu, et al. On the role of NK-2 tachykinin receptors in the mediation of spinal reflex excitability in the rat. Neuroscience. 1991;44(2):483-90.
[2]. P Rovero, et al. A highly selective NK-2 tachykinin receptor antagonist containing D-tryptophan. Eur J Pharmacol. 1990 Jan 3;175(1):113-5.
[3]. A K Henderson, et al. Demonstration of a neurokinin A receptor subtype in transfected fibroblasts. Eur J Pharmacol. 1992 Feb 13;225(2):175-8.