Structure&ndash;Activity Relationships (SAR) of [<small>D</small>-Arg<sup>2</sup>]Dermorphin(1&mdash;4) Analogues, <i>N<sup>&alpha;</sup></i>-Amidino-Tyr-<small>D</small>-Arg-Phe-X
作者:Tadashi Ogawa、Tetsuhisa Miyamae、Toru Okayama、Masaki Hagiwara、Shinobu Sakurada、Tadanori Morikawa
DOI:10.1248/cpb.50.771
日期:——
preferable for expression of potent analgesic activity, and that the free carboxyl group is superior in its analgesic activity to that of the esterified or amidated carboxy group at the C-terminal. In addition, N-methylation of the amide bond at the 4th position contributed to improved analgesic activity. These results indicated that the strong and long-lasting analgesic effect of ADAMB is expressed by
在研究口服给药后具有有效止痛作用的化合物的开发过程中,基于Nα-ami基-甲酰胺的结构,有74个C端类似物(Nα-d基-Tyr-D-Arg-Phe-X)。合成了Tyr-D-Arg-Phe-MeβAla-OH(ADAMB)。在皮下和口服给药后,通过鼠尾压力测试评估它们的镇痛活性,并详细检查其结构活性关系(SAR)。结果清楚地表明,对于有效的镇痛活性,优选在X位上含有侧链β-氨基酸的化合物,并且,游离羧基的镇痛活性优于酯化或酰胺化的羧基。 C端。此外,在第4位的酰胺键的N-甲基化有助于改善止痛活性。这些结果表明,ADAMB的强而持久的镇痛作用由Nα-酰胺化,酰胺键在第4位的N-甲基化和碳链长度(β-Ala)的协同作用来表达。残基在第4位,这是最合适的结构。