Synthesis of substance-P C-terminal hexapeptide analogues and their biological activity. Analogues with antagonistic activity without containing d-amino acids
摘要:
Analogues of the C-terminal hexapeptide of substance P have been synthesized in which each amino-acid residue was replaced by the bulky and strong lipophilic residue Asp(OBz1). The amino-acid residue of other selected places has also been replaced by Glu(OBz1) or Glu(OCH3). The resulting analogues were assayed for agonistic and antagonistic activity in 3 biological preparations, GPI, RC and RPV, which have been proposed as representative of the NK-1, NK-2 and NK-3 receptors, respectively. Although none of the analogues contained D-amino acids, they showed antagonistic activity according to the receptor type. Structure-activity relationships are also reported.
Tritiated peptides. 12. Synthesis and biological activity of [4-3H-Phe8]substance P
作者:Mark C. Allen、Derek E. Brundish、Roy Wade、Bengt E. B. Sandberg、Michael R. Hanley、Leslie L. Iversen
DOI:10.1021/jm00352a022
日期:1982.10
SubstanceP has been prepared 3H labeled at Phe8 by catalytic deiodination of a protected precursor. Synthesis of the precursor was by solid-phase methodology on polydimethylacrylamide resin and by condensation in solution of fragments covering sequences 1-4, 5-7, and 8-11. Free peptide made by each route analyzed satisfactorily and had the same chromatographic characteristics as unlabeled substance
物质P是通过对被保护的前体进行催化碘化制备的,在Phe8处标记3H的物质。前体的合成是通过在聚二甲基丙烯酰胺树脂上的固相方法,以及在溶液中缩合的,覆盖序列1-4、5-7和8-11的片段进行的。通过每种途径制备的游离肽均能令人满意地分析,并且具有与未标记物质P相同的色谱特性。当使用N和C末端定向的抗血清时,通过放射免疫分析无法区分后者,并且能够引起分离的豚鼠回肠收缩。比放射性为23 Ci / mmol。
Hexapeptide amides
申请人:Sterling Drug Inc.
公开号:US04472305A1
公开(公告)日:1984-09-18
N-Terminal L-prolyl or D-prolyl hexapeptide amides useful as Substance P agonists and/or antagonists and as analgesics and/or antihypertensives and a process for preparing them are disclosed.