Synthesis and Anti-Helicobacter pylori Activity of Pyloricidin Derivatives. II. The Combination of Amino Acid Residues in the Dipeptidic Moiety and its Effect on the Anti-Helicobacter pylori Activity.
作者:ATSUSHI HASUOKA、YUJI NISHIKIMI、YUTAKA NAKAYAMA、KEIJI KAMIYAMA、MASAFUMI NAKAO、KEN-ICHIRO MIYAGAWA、OSAMU NISHIMURA、MASAHIKO FUJINO
DOI:10.7164/antibiotics.55.499
日期:——
The novel natural antibiotics pyloricidin A, B and C, consisting of a common (2S,3R,4R,5S)-5-amino-2,3,4,6-tetrahydroxyhexanoyl-beta-D-phenylalanine moiety and a terminal peptidic moiety (pyloricidin A: L-valine-L-valine-L-leucine; pyloricidin B: L-valine-L-leucine; pyloricidin C: L-leucine), exhibit potent and highly selective anti-Helicobacter pylori activity. In order to develop more potent compounds
新型天然抗菌素pyloricidin A,B和C,由常见的(2S,3R,4R,5S)-5-氨基-2,3,4,6-四羟基己酰基-β-D-苯丙氨酸部分和末端肽部分组成(pyloricidin A:L-缬氨酸-L-缬氨酸-L-亮氨酸; pyloricidin B:L-缬氨酸-L-亮氨酸; pyloricidin C:L-亮氨酸),具有有效且高度选择性的抗幽门螺杆菌活性。为了开发更有效的化合物并研究与肽的组合有关的肽部分的结构活性关系,制备了具有各种二肽部分的一系列衍生物,并评估了它们的抗-H。幽门螺杆菌活动。发现该部分中两个氨基酸的结合对活性有显着影响。具有Nva-Abu的化合物显示出优异的抗H值。幽门螺杆菌活性,MIC值为0。相对于幽门螺杆菌TN2为013微克/毫升。此外,发现该化合物在重复口服(10 mg / kg,中标7天)后,可从感染的蒙古沙鼠中清除60%的幽门螺杆菌。