Synthesis, stability and mechanistic studies of potent anticryptococcal hexapeptides
作者:Kitika Shenmar、Krishna K. Sharma、Nishima Wangoo、Indresh K. Maurya、Vinod Kumar、Shabana I. Khan、Melissa R. Jacob、Kulbhushan Tikoo、Rahul Jain
DOI:10.1016/j.ejmech.2017.03.046
日期:2017.5
which has been exploited in the present study by synthesizing a series of hexapeptides that exhibits promising activity against a panel of Gram-negative and Gram-positive bacteria and various pathogenic fungal strains; the most exemplary activity was observed against Cryptococcus neoformans. The peptides 3, 24, 32 and 36 displayed potent anticryptococcal activity (IC50 = 0.4-0.46 μg/mL, MIC = 0.63-1.25
免疫功能低下患者中隐球菌病的发病率不断增长,因此需要一种能够根除该病的新型药物疗法。与传统治疗剂相比,基于肽的药物治疗具有许多优势,传统治疗剂已在本研究中得到利用,其方法是合成一系列六肽,这些六肽对一组革兰氏阴性和革兰氏阳性细菌以及各种病原性真菌菌株显示出有希望的活性; 观察到了对新型隐球菌的最典型的活性。肽3、24、32和36表现出强大的抗隐球菌活性(IC50 = 0.4-0.46μg/ mL,MIC = 0.63-1.25μg/ mL,MFC = 0.63-1.25μg/ mL),并且在蛋白水解条件下具有稳定性。除此之外,其他几种肽还显示出对病原菌的抑制作用。突出的肽包括表现出IC50值在2.1和3.6μg/ mL之间的肽18-20和26,针对金黄色葡萄球菌和耐甲氧西林的S的MIC为5-20μg/ mL和MBC为10-20μg/ mL。金黄色的。通过扫描电子显微镜和透射电子显微镜研究证