Understanding and exploiting regulation in pathogenic enteroaggregative Escherichia coli

了解和利用致病性肠聚集性大肠杆菌的调控

基本信息

  • 批准号:
    BB/R017689/1
  • 负责人:
  • 金额:
    $ 62.43万
  • 依托单位:
  • 依托单位国家:
    英国
  • 项目类别:
    Research Grant
  • 财政年份:
    2019
  • 资助国家:
    英国
  • 起止时间:
    2019 至 无数据
  • 项目状态:
    已结题

项目摘要

Many bacteria cause diarrhoea in humans because, when they are ingested, they colonise the lower gut by attaching to the lining of the intestine. They then produce products that cause abnormal levels of fluid build-up in the host's gut. For most people, such diarrhoea is merely an irritation, but, for some, it can be life-threatening. Currently, one especially troublesome cause of diarrhoea, in both developed and developing countries, is enteroaggregative Escherichia coli (EAEC). This harmful organism probably evolved from harmless Escherichia coli strains following the acquisition of a score or so of extra genes that allow it to attach to human intestines and cause diarrhoea. Studies with EAEC and with other harmful bacteria have shown that the expression of these extra genes, which cause disease, is tightly controlled. For EAEC, and related harmful bacteria, we now know what the principal regulators are. Interestingly, the most important of these regulators was acquired with the other extra genes, and its role appears to be mainly to make sure that the harmful bacteria only express the disease-causing genes when the harmful bacteria are in the host. Hence the main aims of the work proposed here are to do experiments that will tell us how the main regulator is activated when the bacteria get to the gut, and how the activity of the regulator is turned on and turned off. We plan to look at EAEC strains from patients from different countries to see if the same mechanism is always used and also to check the harmful genes in the different strains. Once we have understood how the regulator works, we will use genetic engineering techniques to make derivatives of the regulator that are defective and so will interfere with virulent strains. We will devise ways to deliver the defective regulator to harmful cells during infection with a view to developing a new way to treat bactreial infection that involves 'disarming' the harmful bacteria rather than killing them.
许多细菌会导致人类腹泻,因为当它们被摄入时,它们会附着在肠道的衬里上,从而在下部肠道定居。然后,他们生产的产品会导致宿主肠道内异常水平的液体积聚。对大多数人来说,这种腹泻只是一种刺激,但对一些人来说,它可能会危及生命。目前,无论在发达国家还是发展中国家,引起腹泻的一个特别棘手的原因是肠聚集性大肠杆菌(EAEC)。这种有害的微生物可能是从无害的大肠杆菌菌株进化而来的,这些菌株获得了大约20个额外的基因,使其能够附着在人体肠道并导致腹泻。对EAEC和其他有害细菌的研究表明,这些导致疾病的额外基因的表达受到严格控制。对于EAEC和相关的有害细菌,我们现在知道了主要的监管机构是什么。有趣的是,这些调控因子中最重要的是与其他额外基因一起获得的,其作用似乎主要是确保有害细菌只有在有害细菌存在于宿主中时才表达致病基因。因此,这里提出的工作的主要目的是做实验,告诉我们当细菌到达肠道时,主要调节器是如何激活的,以及调节器的活动是如何打开和关闭的。我们计划观察来自不同国家患者的EAEC菌株,看看是否总是使用相同的机制,并检查不同菌株中的有害基因。一旦我们了解了调节器的工作原理,我们将使用基因工程技术来制造有缺陷的调节器的衍生品,从而干扰有毒菌株。我们将设计出在感染过程中将有缺陷的调节器传递给有害细胞的方法,以期开发一种治疗细菌感染的新方法,这种方法包括“解除”有害细菌的武装,而不是杀死它们。

项目成果

期刊论文数量(10)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Novel organisation and regulation of the pic promoter from enteroaggregative and uropathogenic Escherichia coli.
  • DOI:
    10.1080/21505594.2022.2111754
  • 发表时间:
    2022-12
  • 期刊:
  • 影响因子:
    5.2
  • 作者:
  • 通讯作者:
RNA polymerase spoiled for choice as transcription begins.
当转录开始时,RNA 聚合酶的选择就变多了。
Laboratory strains of Escherichia coli K-12: things are seldom what they seem.
  • DOI:
    10.1099/mgen.0.000922
  • 发表时间:
    2023-03
  • 期刊:
  • 影响因子:
    3.9
  • 作者:
    Browning, Douglas F.;Hobman, Jon L.;Busby, Stephen J. W.
  • 通讯作者:
    Busby, Stephen J. W.
Heterologous Expression of Membrane Proteins in E. coli.
膜蛋白在大肠杆菌中的异源表达。
Antimicrobial Resistance and Comparative Genome Analysis of Klebsiella pneumoniae Strains Isolated in Egypt.
  • DOI:
    10.3390/microorganisms9091880
  • 发表时间:
    2021-09-05
  • 期刊:
  • 影响因子:
    4.5
  • 作者:
    Abdelwahab R;Alhammadi MM;Hassan EA;Ahmed EH;Abu-Faddan NH;Daef EA;Busby SJW;Browning DF
  • 通讯作者:
    Browning DF
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Steve Busby其他文献

Kinked, curved or bent but certainly not going straight
扭结、弯曲或弯曲,但肯定不会笔直
  • DOI:
  • 发表时间:
    1992
  • 期刊:
  • 影响因子:
    9.2
  • 作者:
    Steve Busby
  • 通讯作者:
    Steve Busby

Steve Busby的其他文献

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{{ truncateString('Steve Busby', 18)}}的其他基金

Global Regulators in a Bacterial Pathogen and Virulence
细菌病原体和毒力的全球调节剂
  • 批准号:
    BB/W00285X/1
  • 财政年份:
    2022
  • 资助金额:
    $ 62.43万
  • 项目类别:
    Research Grant
Bacterial chromosome structure and transcription
细菌染色体结构和转录
  • 批准号:
    BB/J006076/1
  • 财政年份:
    2012
  • 资助金额:
    $ 62.43万
  • 项目类别:
    Research Grant

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