PLoS Patho:发现肺炎链球菌可通过小RNA来控制其毒力表达
导读 | 近日,刊登在国际著名杂志<em>PLoS Pathogens</em>上的一篇研究报告“Control of Virulence by Small RNAs in Streptococcus pneumoniae”揭示了美国圣裘德儿童研究医院研究人员的最新研究成果,文章中,研究者揭示了在肺炎链球菌中通过小RNA来控制细菌的毒力。
世界范围内,肺炎是儿童主要的致死原因,... |
近日,刊登在国际著名杂志<em>PLoS Pathogens</em>上的一篇研究报告“Control of Virulence by Small RNAs in Streptococcus pneumoniae”揭示了美国圣裘德儿童研究医院研究人员的最新研究成果,文章中,研究者揭示了在肺炎链球菌中通过小RNA来控制细菌的毒力。
世界范围内,肺炎是儿童主要的致死原因,引发肺炎的一个主要原因是患者感染了致病菌肺炎链球菌,理解病原菌如何快速对宿主产生反应对于我们揭示其致病菌至关重要。
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在真核生物和原核生物中,小型非编码的RNA(sRNAs)在调节基因表达方面扮演着非常重要的作用。然而目前并没有报道sRNA在影响肺炎链球菌上的作用,基于基因间隔区签字啊的编码能力,研究者们假设肺炎球菌可以产生许多sRNA并且其在菌体的致病性上扮演着非常重要的作用。
在研究报告中,研究者Jason W. Rosch说到,他们使用了全基因组转录测序技术来系统性的识别发现肺炎链球菌(Streptococcus pneumoniae)的sRNAs,使用这种技术,研究者发现了89个假设的sRNAs,其中56个为新发现的。通过深入研究,研究者运用定向基因操作技术和转座突变的方法,揭示了其中许多小RNA在影响细菌独立上扮演着重要的角色。研究数据为我们更好地理解肺炎链球菌中小RNA所扮演的角色和功能提供了基础,而且研究者也是首次揭示了sRNA在肺炎链球菌中所发挥的功能。
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<img src="http://www.bioon.com/biology/UploadFiles/201208/2012080700145483.jpg" alt="" width="113" height="149" border="0" />
<a title="" href="http://dx.doi.org/doi:10.1371/journal.ppat.1002788" target="_blank">doi:10.1371/journal.ppat.1002788</a>
PMC:
PMID:
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<br/><strong>Control of Virulence by Small RNAs in Streptococcus pneumoniae</strong><br/>
Beth Mann1#, Tim van Opijnen2#, Jianmin Wang3, Caroline Obert3, Yong-Dong Wang3, Robert Carter3, Daniel J. McGoldrick3, Granger Ridout3, Andrew Camilli4, Elaine I. Tuomanen1, Jason W. Rosch1*
Small noncoding RNAs (sRNAs) play important roles in gene regulation in both prokaryotes and eukaryotes. Thus far, no sRNA has been assigned a definitive role in virulence in the major human pathogen Streptococcus pneumoniae. Based on the potential coding capacity of intergenic regions, we hypothesized that the pneumococcus produces many sRNAs and that they would play an important role in pathogenesis. We describe the application of whole-genome transcriptional sequencing to systematically identify the sRNAs of Streptococcus pneumoniae. Using this approach, we have identified 89 putative sRNAs, 56 of which are newly identified. Furthermore, using targeted genetic approaches and Tn-seq transposon screening, we demonstrate that many of the identified sRNAs have important global and niche-specific roles in virulence. These data constitute the most comprehensive analysis of pneumococcal sRNAs and provide the first evidence of the extensive roles of sRNAs in pneumococcal pathogenesis.
<br/>来源:生物谷
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世界范围内,肺炎是儿童主要的致死原因,引发肺炎的一个主要原因是患者感染了致病菌肺炎链球菌,理解病原菌如何快速对宿主产生反应对于我们揭示其致病菌至关重要。
<!--more-->
在真核生物和原核生物中,小型非编码的RNA(sRNAs)在调节基因表达方面扮演着非常重要的作用。然而目前并没有报道sRNA在影响肺炎链球菌上的作用,基于基因间隔区签字啊的编码能力,研究者们假设肺炎球菌可以产生许多sRNA并且其在菌体的致病性上扮演着非常重要的作用。
在研究报告中,研究者Jason W. Rosch说到,他们使用了全基因组转录测序技术来系统性的识别发现肺炎链球菌(Streptococcus pneumoniae)的sRNAs,使用这种技术,研究者发现了89个假设的sRNAs,其中56个为新发现的。通过深入研究,研究者运用定向基因操作技术和转座突变的方法,揭示了其中许多小RNA在影响细菌独立上扮演着重要的角色。研究数据为我们更好地理解肺炎链球菌中小RNA所扮演的角色和功能提供了基础,而且研究者也是首次揭示了sRNA在肺炎链球菌中所发挥的功能。
<div id="ztload">
<div>
<div>
<img src="http://www.bioon.com/biology/UploadFiles/201208/2012080700145483.jpg" alt="" width="113" height="149" border="0" />
<a title="" href="http://dx.doi.org/doi:10.1371/journal.ppat.1002788" target="_blank">doi:10.1371/journal.ppat.1002788</a>
PMC:
PMID:
</div>
<div>
<br/><strong>Control of Virulence by Small RNAs in Streptococcus pneumoniae</strong><br/>
Beth Mann1#, Tim van Opijnen2#, Jianmin Wang3, Caroline Obert3, Yong-Dong Wang3, Robert Carter3, Daniel J. McGoldrick3, Granger Ridout3, Andrew Camilli4, Elaine I. Tuomanen1, Jason W. Rosch1*
Small noncoding RNAs (sRNAs) play important roles in gene regulation in both prokaryotes and eukaryotes. Thus far, no sRNA has been assigned a definitive role in virulence in the major human pathogen Streptococcus pneumoniae. Based on the potential coding capacity of intergenic regions, we hypothesized that the pneumococcus produces many sRNAs and that they would play an important role in pathogenesis. We describe the application of whole-genome transcriptional sequencing to systematically identify the sRNAs of Streptococcus pneumoniae. Using this approach, we have identified 89 putative sRNAs, 56 of which are newly identified. Furthermore, using targeted genetic approaches and Tn-seq transposon screening, we demonstrate that many of the identified sRNAs have important global and niche-specific roles in virulence. These data constitute the most comprehensive analysis of pneumococcal sRNAs and provide the first evidence of the extensive roles of sRNAs in pneumococcal pathogenesis.
<br/>来源:生物谷
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