Development of a Dominant Negative Competence-Stimulating Peptide (dnCSP) that Attenuates Streptococcus pneumoniae Infectivity in a Mouse Model of Acute Pneumonia.

Development of a Dominant Negative Competence-Stimulating Peptide (dnCSP) that Attenuates Streptococcus pneumoniae Infectivity in a Mouse Model of Acute Pneumonia.
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DOI:
10.1002/cbic.201800505
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发表时间:
2018-11-16
期刊:
Chembiochem : a European journal of chemical biology
影响因子:
--
通讯作者:
Tal-Gan Y
Tal-Gan Y
中科院分区:
其他
文献类型:
--
作者:
Koirala B;Lin J;Lau GW;Tal-Gan Y

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肺炎链球菌(Streptococcus pneumoniae)(肺炎球菌)是导致多种疾病的流行的人类病原体,包括肺炎、菌血症、败血症、脑膜炎和中耳炎,仅在美国每年的死亡人数就超过22,000人。肺炎球菌利用感受态调节子及其相关的信号肽,感受态刺激肽(CSP),启动其对宿主的攻击并建立感染。在这项工作中,我们着手:1)开发一种泛组QS抑制剂,可以有效地与肺炎球菌ComD 1和ComD 2受体相互作用; 2)评估显性阴性CSP(dnCSPs)在减弱肺炎球菌感染性方面的效用。我们的研究结果强调了抑制感受态调节子作为对抗肺炎球菌感染的治疗方法的潜力。在急性肺炎小鼠模型中,感染后2小时给予显性负性能力刺激肽(dnCSP)导致肺炎链球菌感染性减弱并增加存活率。
Streptococcus pneumoniae (pneumococcus) is a prevalent human pathogen responsible for a variety of diseases, including pneumonia, bacteremia, sepsis, meningitis and otitis media, with a death toll of >22,000 a year in the United States alone. Pneumococcus utilizes the competence regulon and its associated signaling peptide, the competence stimulating peptide (CSP), to initiate its attack on the host and establish an infection. In this work, we set to: 1) develop a pan-group QS inhibitor that can effectively interact with both the pneumococcus ComD1 and ComD2 receptors; and 2) evaluate the utility of dominant-negative CSPs (dnCSPs) in attenuating pneumococcus infectivity. Our results highlight the potential of inhibiting the competence regulon as a therapeutic approach to combat pneumococcus infections. Administration of a dominant-negative competence stimulating peptide (dnCSP) two-hour post-infection resulted in attenuation of Streptococcus pneumoniae infectivity and increased survival in a mouse model of acute pneumonia.
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