STM:PC190723药物能使MRSA变得敏感

2012-03-23 MedSci MedSci原创

近日,国际著名医学杂志Science Translational Medicine在线刊登了国外研究者的最新研究成果“Restoring Methicillin-Resistant Staphylococcus aureus Susceptibility to β-Lactam Antibiotics,”,文章中,研究者揭示了治疗耐甲氧西林金黄色葡萄球菌(MRSA)的一种新方法。 据一项新的研究

近日,国际著名医学杂志Science Translational Medicine在线刊登了国外研究者的最新研究成果“Restoring Methicillin-Resistant Staphylococcus aureus Susceptibility to β-Lactam Antibiotics,”,文章中,研究者揭示了治疗耐甲氧西林金黄色葡萄球菌(MRSA)的一种新方法。

据一项新的研究报告,将一种新药与目前可以获得的一种抗菌素同时给予病人可能有治疗危险的抗甲氧西林金黄色葡萄球菌或称MRSA感染的潜力。 MRSA流行菌株或“葡萄球菌”感染在医院中是常见的,它们(截止到2005年)在美国的估计死亡率超过HIV/艾滋病的死亡率。 单一、独立的药物仍然是医生治疗细菌感染的首选武器。 这些化合物通常是通过直接参与该过程的因子化学性抑制来对抗抗药性的。

Christopher Tan及其同事为人们提供一种将一个叫做PC190723的新药与一类目前使用的叫做β内酰胺类的抗菌素结合应用的新的治疗方法。 该药物组合通过一种“多米诺效应”而重新使MRSA变得敏感,即第一个药物PC190723阻断了细胞分裂蛋白FtsZ的表达,而这又损害了第二个叫做PBP2的蛋白。 由于PBP2是MRSA抗β内酰胺类抗菌素所需要的,因此破坏其活性可重新使MRSA对β内酰胺类变得敏感。 抑制FtsZ蛋白看来还抑制了MRSA的生长和生存能力。 这些结果提供的证据表明这两种抗菌素具有协同作用,即它们的组合抗MRSA的功效要比单独使用它们当中任何一种药物时的功效都大。 此外,由于这些化合物相互之间具有协同性,因此使抗感染所需的每种化合物的剂量显著减少,从而潜在地避免有害的副作用

原始链接http://stm.sciencemag.org/content/4/126/126ra35

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    2012-09-11 gdsun
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