作者:Susanne Koschatzky、Peter Gmeiner
DOI:10.1002/cmdc.201100499
日期:2012.3.5
neuromodulatory peptide neurotensin has been described to functionally interact with dopaminergic pathways of the human brain. We employed radioligand binding studies to investigate the physical interaction between co‐expressed dopamine D2L or D3 and neurotensin NTS1 or NTS2 receptors. Substantial cross‐inhibitory effects of both receptor subtypes NTS1 and NTS2 on the agonist binding of D2L or D3 were
已经描述了神经调节肽神经降压素与人脑的多巴胺能途径在功能上相互作用。我们采用放射性配体结合研究来研究共表达的多巴胺D 2L或D 3与神经降压素NTS 1或NTS 2受体之间的物理相互作用。在存在神经降压素的情况下,检测到两种受体亚型NTS 1和NTS 2对D 2L或D 3的激动剂结合具有明显的交叉抑制作用。为了鉴定配体特异性调节和亚型依赖性差异,新型多巴胺受体激动剂5和6合成了带有7-OH-DPAT药效团的。在D 3 –NTS 2共表达中观察到了出色的配体特异性,在存在神经降压素的情况下,其对联苯甲酰胺5的亲和力降低了20倍。比较在存在神经降压素的情况下多巴胺能化合物的结合特性,观察到多巴胺受体亚型对神经降压素的交叉抑制作用具有选择性。