EMBO J:武汉病毒所发现噬菌体裂解酶具有降低金黄色葡萄球菌毒力与增强免疫清除功能

2018-09-17 佚名 武汉病毒所

由于抗生素广泛使用和研制全新抗生素面临较大困难,近年来包括MRSA在内的超级耐药细菌日益增多,严重威胁人类健康。据世界著名经济学家Jim O’neill 2014年的一项研究,如果人类现在不采取行动遏制耐药性细菌,到2050 年全球每年因耐药菌感染死亡的人数将高达1000万人,相关花费高达63万亿英镑,占全球经济总量的2%-3.5%。因此,研究和发展能对抗耐药细菌感染的新药物刻不容缓。

近日,中国科学院武汉病毒研究所的一项研究发现来源于噬菌体裂解酶的重组蛋白V12CBD具有降低金黄色葡萄球菌毒力与增强免疫清除的多重功能,为研究治疗包括耐甲氧西林金黄色葡萄球菌(MRSA)在内的超级耐药细菌感染药物提供了新的思路,研究成果在线发表于《The EMBO Journal》( 《欧洲分子生物学组织杂志》),原文题为“Staphylococcus aureus virulence attenuation and immune clearance mediated by a phage lysin-derived protein”(一种噬菌体裂解酶来源蛋白质降低金黄色葡萄球菌毒力与增强免疫清除研究)。

由于抗生素广泛使用和研制全新抗生素面临较大困难,近年来包括MRSA在内的超级耐药细菌日益增多,严重威胁人类健康。据世界著名经济学家Jim O’neill 2014年的一项研究,如果人类现在不采取行动遏制耐药性细菌,到2050 年全球每年因耐药菌感染死亡的人数将高达1000万人,相关花费高达63万亿英镑,占全球经济总量的2%-3.5%。因此,研究和发展能对抗耐药细菌感染的新药物刻不容缓。作为细菌的“天敌”,细菌病毒也即噬菌体具有特异杀菌、对环境和人无害等优点,噬菌体治疗耐药细菌感染研究在近些年重新得到了高度重视。中国科学院武汉病毒研究所危宏平研究员团队一直致力噬菌体治疗方面的研究,分离了多种噬菌体和已发现了多个能快速杀灭耐药细菌的重组噬菌体裂解酶。

该研究团队在这些研究基础上,进一步研究了一种来自于噬菌体裂解酶PlyV12结合域的V12CBD蛋白质,发现在体外与金黄色葡萄球菌结合后,V12CBD不仅能降低多个金葡菌毒力因子的表达,而且具有通过激活NF-κB通路提高巨噬细胞杀灭金葡菌的功能。在小鼠感染模型上,V12CBD不仅显示了较好的治疗效果,而且具有很好的免疫预防效果。该研究首次发现一个蛋白质分子同时具有治疗(作用于细菌本身)和免疫保护(激活宿主免疫反应)效果,为研究治疗包括MRSA在内的超级耐药细菌感染药物提供了新的思路和潜在靶标,具有重要意义。



中国科学院武汉病毒研究所的杨航青年研究员为该论文的第一作者,危宏平研究员和武汉大学李宇红教授为论文共同通讯作者,中国科学院武汉病毒研究所魏滨研究员、陈建军副研究员、杨艳副研究员、郑振华青年研究员等对该研究给予了建议和帮助。该研究得到了国家自然科学基金、中国科学院等项目资助。

原始出处:Hang Yang, Jingjing Xu, Wuyou Li, et al. Staphylococcus aureus virulence attenuation and immune clearance mediated by a phage lysin‐derived protein. The EMBO Journal (2018)

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    2018-09-18 明月清辉

    谢谢分享,学习了

    0

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    2018-09-18 liumin1987

    嗯嗯,学习了。

    0

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