Six substance P (SP) analogs, in which the glutaminyl residue(s) at the position(s) 5 or/and 6 were replaced by homoglutamine (Hgn), were prepared using a novel Nα,Nca–(Boc)2–Hgn–OH by the solid phase method. The activity of the analogs was assayed on isolated guinea pig organs. Results indicate that the elongation of the methylene on glutaminyl residue(s) in SP enhances the activity on isolated guinea pig ileum.
通过固相法,使用新型的Nα,Nca–(Boc)2–Hgn–OH,制备了六种 substance P (
SP) 类似物,这些类似物中,第5和/或第6位的谷
氨酰残基被同型谷
氨酰(Hgn)所取代。在离体豚鼠器官上对这些类似物的活性进行了测定。结果表明,在
SP中,谷
氨酰残基上的甲撑基的延长增强了其在离体豚鼠回肠上的活性。