An opportunistic pathogen under stress: how group B streptococcus responds to cytotoxic reactive species and conditions of metal ion imbalance to survive
Kelvin G K Goh, Devika Desai, Ruby Thapa, Darren Prince, Dhruba Acharya, Matthew J Sullivan, Glen C Ulett
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引用次数: 0
Abstract
Group B Streptococcus (GBS; also known as Streptococcus agalactiae) is an opportunistic bacterial pathogen that causes sepsis, meningitis, pneumonia and skin and soft tissue infections in neonates and healthy or immunocompromised adults. GBS is well-adapted to survive in humans due to a plethora of virulence mechanisms that afford responses to support bacterial survival in dynamic host environments. These mechanisms and responses include counteraction of cell death from exposure to excess metal ions that can cause mismetallation and cytotoxicity, and strategies to combat molecules such as reactive oxygen and nitrogen species that are generated as part of innate host defence. Cytotoxicity from reactive molecules can stem from damage to proteins, DNA, and membrane lipids, potentially leading to bacterial cell death inside phagocytic cells or within extracellular spaces within the host. Deciphering the ways in which GBS responds to the stress of cytotoxic reactive molecules within the host will benefit the development of novel therapeutic and preventative strategies to manage the burden of GBS disease. This review summarises knowledge of GBS carriage in humans and the mechanisms used by the bacteria to circumvent killing by these important elements of host immune defence: oxidative stress, nitrosative stress, and stress from metal ion intoxication/mismetallation.
期刊介绍:
Title: FEMS Microbiology Reviews
Journal Focus:
Publishes reviews covering all aspects of microbiology not recently surveyed
Reviews topics of current interest
Provides comprehensive, critical, and authoritative coverage
Offers new perspectives and critical, detailed discussions of significant trends
May contain speculative and selective elements
Aimed at both specialists and general readers
Reviews should be framed within the context of general microbiology and biology
Submission Criteria:
Manuscripts should not be unevaluated compilations of literature
Lectures delivered at symposia must review the related field to be acceptable