A new antiarrhythmic peptide, N-3-(4-hydroxyphenyl)propionyl Pro-Hyp-Gly-Ala-Gly.
作者:YASUHIRO KOHAMA、NAOTSUGU OKIMOTO、TSUTOMU MIMURA、CHIKARA FUKAYA、MASAHIRO WATANABE、KAZUMASA YOKOYAMA
DOI:10.1248/cpb.35.3928
日期:——
In order to increase the antiarrhythmic activity of Pro-Hyp-Gly-Ala-Gly (P-5), P-5 analogues with three different hydrophobic substituents, N-3- (4-hydroxyphenyl) propionyl (H), N-3-phenyl-propionyl (I) and N-3-phenylpropyl (P), were prepared and their activities were evaluated in CaCl2-induced arrhythmias in mice. HP-5 showed potent antiarrhythmic activity at 1 mg/kg, i.v. and its potency was much higher than that of P-5 at 10 mg/kg, i.v. IP-5 showed similar potency to P-5, but PP-5 was inactive. Pro-Hyp-Gly-Ala, Pro-Hyp-Gly and Pro-Hyp with the substituent, H, were also ineffective. Thus, 3- (4-hydroxyphenyl) propionylation of the imino nitrogen of Pro in P-5 led to increased potency.
为了提高 Pro-Hyp-Gly-Ala-Gly (P-5)的抗心律失常活性,制备了具有三种不同疏水取代基(N-3- (4-hydroxyphenyl) propionyl (H)、N-3-phenyl-propionyl (I)和 N-3-phenyl-propyl(P))的 P-5 类似物,并评估了它们在 CaCl2 诱导的小鼠心律失常中的活性。HP-5 在静脉注射 1 毫克/千克时显示出强大的抗心律失常活性,在静脉注射 10 毫克/千克时,其效力远高于 P-5。Pro-Hyp-Gly-Ala、Pro-Hyp-Gly 和带有取代基 H 的 Pro-Hyp 也无效。因此,对 P-5 中 Pro 的亚氨基氮进行 3-(4-羟基苯基)丙酰化可提高药效。