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- W3209707934 abstract "Abstract Pathogenic Rickettsia are obligate intracellular bacteria and the etiologic agents of many life‐threatening infectious diseases. Due to the serious nature of these infections, it is imperative to both identify the responsive immune sensory pathways and understand the associated immune mechanisms that restrict Rickettsia proliferation. Previous studies have demonstrated that the mammalian complement system is both activated during Rickettsia infection and contributes to the immune response to infection. To further define this component of the mammalian anti‐ Rickettsia immune response, we sought to identify the mechanism(s) of complement activation during Rickettsia infection. We have employed a series of in vitro and in vivo models of infection to investigate the role of the classical complement activation pathway during Rickettsia infection. Depletion or elimination of complement activity demonstrates that both C1q and pre‐existing IgM contribute to complement activation; thus implicating the classical complement system in Rickettsia ‐mediated complement activation. Elimination of the classical complement pathway from mice increases susceptibility to R . australis infection with both increased bacterial loads in multiple tissues and decreased immune activation markers. This study highlights the role of the classical complement pathway in immunity against Rickettsia and implicates resident Rickettsia ‐responsive IgM in the response to infection." @default.
- W3209707934 created "2021-11-08" @default.
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- W3209707934 date "2021-11-13" @default.
- W3209707934 modified "2023-10-16" @default.
- W3209707934 title "Contribution of classical complement activation and IgM to the control of <i>Rickettsia</i> infection" @default.
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- W3209707934 doi "https://doi.org/10.1111/mmi.14839" @default.
- W3209707934 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/34725868" @default.
- W3209707934 hasPublicationYear "2021" @default.
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