Synthesis and Anti-Helicobacter pylori Activity of Pyloricidin Derivatives. I. Structure-activity Relationships on the Terminal Peptidic Moiety.
作者:ATSUSHI HASUOKA、YUJI NISHIKIMI、YUTAKA NAKAYAMA、KEIJI KAMIYAMA、MASAFUMI NAKAO、KEN-ICHIRO MIYAGAWA、OSAMU NISHIMURA、MASAHIKO FUJINO
DOI:10.7164/antibiotics.55.322
日期:——
The novel natural antibiotics pyloricidin A, B and C possess potent and highly selective antibacterial activity against Helicobacter pylori. In order to investigate the structure activity relationships for the terminal peptidic moiety, a series of pyloricidin B and pyloricidin C derivatives, bearing various amino acids in the moiety, were prepared and evaluated for their anti-H. pylori activity. The derivatives bearing α-D-, β- and γ-amino acids or peptidemimetics showed drastically decreased activity. On the other hand, the derivatives with α-L-amino acids were found to maintain the activity. Among the derivatives prepared in this work, the allylglycine derivative 2s showed the most potent anti-H. pylori activity, with an MIC value of less than 0.006μg/ml against H. pylori NCTC11637, which is 60-fold greater than the activity of the lead compound pyloricidin C.
新型天然抗生素喷菌素A、B和C对幽门螺杆菌具有强效且高度选择性的抗菌活性。为了研究末端肽部分的结构-活性关系,制备了一系列含不同氨基酸的喷菌素B和喷菌素C衍生物,并评估了它们的抗幽门螺杆菌活性。含有α-D-、β-和γ-氨基酸或肽模拟物的衍生物显示出显著降低的活性。另一方面,含有α-L-氨基酸的衍生物被发现能保持活性。在本工作中制备的衍生物中,烯丙基甘氨酸衍生物2s表现出最强的抗幽门螺杆菌活性,对幽门螺杆菌NCTC11637的最低抑制浓度(MIC)值小于0.006μg/ml,比原始化合物喷菌素C的活性高出60倍。