Synthesis and analgesic activity of C-terminal fragment peptides of cholecystokinin.
作者:KOJI IUCHI、MASAHIRO NITTA、TAKASHI TANAKA、KEIZO ITO、YASUO MORIMOTO、GORO TSUKAMOTO
DOI:10.1248/cpb.35.4307
日期:——
Eleven C-terminal fragment peptides of cholecystokinin (CCK) which contain a O-sulfated tyrosine residue [CCK (27-32), CCK (27-31), CCK (27-31) amide, CCK (27-30), CCK (27-30) amide, CCK (27-29), CCK (27-29) amide, CCK (26-27), CCK (26-27) amide, CCK (25-27) and CCK (25-27) amide] were prepared by the solution method. The syntheses of these peptides were carried out by stepwise condensation in combination with fragment condensation. Analgesic effects of these fragment peptides were measured by means of the writhing test. The ED50 value of CCK (27-32) was 9.1 mg/kg and that of CCK (25-27) was 7.5 mg/kg, but the other synthetic peptides produced no statistically significant response at a dose of 8 or 10 mg/kg.
十一种包含O-硫酸化酪氨酸残基的胆囊收缩素(CCK)C端片段肽[CCK (27-32)、CCK (27-31)、CCK (27-31) 酰胺、CCK (27-30)、CCK (27-30) 酰胺、CCK (27-29)、CCK (27-29) 酰胺、CCK (26-27)、CCK (26-27) 酰胺、CCK (25-27) 和 CCK (25-27) 酰胺]通过溶液法制备。这些肽的合成是通过逐步缩合与片段缩合结合来进行的。这些片段肽的镇痛效果通过扭动测试进行测量。CCK (27-32) 的ED50值为9.1 mg/kg,而CCK (25-27) 的ED50值为7.5 mg/kg,其他合成肽在8或10 mg/kg剂量下没有产生统计学显著反应。