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Quorum sensing in the genus Burkholderia

机译:伯克霍尔德氏菌属中的群体感应

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The genus Burkholderia contains over 30 species, many of which are important human pathogens. In addition to the primary pathogens Burkholderia pseudomallei and Burkholderia mallei, several species have emerged as opportunistic pathogens in persons suffering from cystic fibrosis (CF) and immunocompromised individuals. All Burkholderia species investigated so far employ quorum-sensing (QS) systems that rely on N-acyl-homoserine lactone (AHL) signal molecules to express certain phenotypic traits in a population density-dependent manner. Whilst many Burkholderia strains only contain the CepI/CepR QS system, which relies on C8-HSL, some strains, in particular isolates of B. pseudomallei and B. mallei, harbour multiple LuxI/LuxR homologues and produce numerous AHL signal molecules. Evidence has accumulated over the past few years that the QS systems operating in Burkholderia are crucial for full virulence in various animal models. However, only few QS-regulated functions required for virulence in the different infection models have so far been identified. Given the essential role of QS in the expression of pathogenic traits in Burkholderia these regulatory systems represent attractive targets for the development of novel therapeutics. (c) 2006 Elsevier GmbH. All rights reserved.
机译:伯克霍尔德氏菌属包含30多种,其中许多是重要的人类病原体。除了主要的病原体伯克霍尔德氏菌和马氏伯克霍尔德氏菌外,在患有囊性纤维化(CF)的人和免疫功能低下的人中还出现了几种机会致病菌。迄今为止,所有调查的伯克霍尔德氏菌物种均采用群体感应(QS)系统,该系统依赖于N-酰基-高丝氨酸内酯(AHL)信号分子以种群密度依赖性的方式表达某些表型性状。尽管许多伯克霍尔德菌菌株仅包含依赖于C8-HSL的CepI / CepR QS系统,但某些菌株,尤其是假双歧芽孢杆菌和马来芽孢杆菌的分离株,具有多个LuxI / LuxR同源物并产生许多AHL信号分子。过去几年中积累的证据表明,在伯克霍尔德州运行的QS系统对于各种动物模型中的完全毒力至关重要。但是,到目前为止,在不同的感染模型中,只有很少的QS调节功能可以实现毒性反应。鉴于QS在伯克霍尔德氏菌病原性表达中的重要作用,这些调节系统代表了新型疗法发展的诱人靶标。 (c)2006 Elsevier GmbH。版权所有。

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