Pattern Recognition Receptors in Innate Immunity to Obligate Intracellular Bacteria

Host pattern recognition receptors (PRRs) are crucial for sensing pathogenic microorganisms, initiating innate responses, and modulating pathogen-specific adaptive immunity during infection. Rickettsia spp. , Orientia tsutsugamushi , Anaplasma spp. , Ehrlichia spp. , and Coxiella burnetii are...

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Main Authors: James R. Fisher, Zachary D. Chroust, Florence Onyoni, Lynn Soong
Format: Article
Language:English
Published: Compuscript Ltd 2021-09-01
Series:Zoonoses
Online Access:https://www.scienceopen.com/hosted-document?doi=10.15212/ZOONOSES-2021-0011
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author James R. Fisher
Zachary D. Chroust
Florence Onyoni
Lynn Soong
author_facet James R. Fisher
Zachary D. Chroust
Florence Onyoni
Lynn Soong
author_sort James R. Fisher
collection DOAJ
description Host pattern recognition receptors (PRRs) are crucial for sensing pathogenic microorganisms, initiating innate responses, and modulating pathogen-specific adaptive immunity during infection. Rickettsia spp. , Orientia tsutsugamushi , Anaplasma spp. , Ehrlichia spp. , and Coxiella burnetii are obligate intracellular bacteria that can replicate only within host cells and must evade immune detection to successfully propagate. These five bacterial species are zoonotic pathogens of clinical or agricultural importance, yet uncovering how immune recognition occurs has remained challenging. Recent evidence from in vitro studies and animal models has yielded new insights into the types and kinetics of PRR activation during infection with Rickettsia spp. , A. phagocytophilum , E. chaffeensis , and C. burnetii . However, much less was known about PRR activation in O. tsutsugamushi infection until the recent discovery of the role of the C-type lectin receptor Mincle during lethal infection in mice and in primary macrophage cultures. This review provides a brief summary of the clinical and epidemiologic features of these five bacterial infections, with a focus on the fundamental biologic facets of infection, and recent advances in host recognition. In addition, knowledge gaps regarding the innate recognition of these bacteria in the context of disease pathogenesis are discussed.
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spelling doaj.art-489b4ba102a244c8a07f2fe1f4dd05232023-12-08T17:00:39ZengCompuscript LtdZoonoses2737-74662737-74742021-09-011199010.15212/ZOONOSES-2021-0011Pattern Recognition Receptors in Innate Immunity to Obligate Intracellular BacteriaJames R. FisherZachary D. ChroustFlorence OnyoniLynn SoongHost pattern recognition receptors (PRRs) are crucial for sensing pathogenic microorganisms, initiating innate responses, and modulating pathogen-specific adaptive immunity during infection. Rickettsia spp. , Orientia tsutsugamushi , Anaplasma spp. , Ehrlichia spp. , and Coxiella burnetii are obligate intracellular bacteria that can replicate only within host cells and must evade immune detection to successfully propagate. These five bacterial species are zoonotic pathogens of clinical or agricultural importance, yet uncovering how immune recognition occurs has remained challenging. Recent evidence from in vitro studies and animal models has yielded new insights into the types and kinetics of PRR activation during infection with Rickettsia spp. , A. phagocytophilum , E. chaffeensis , and C. burnetii . However, much less was known about PRR activation in O. tsutsugamushi infection until the recent discovery of the role of the C-type lectin receptor Mincle during lethal infection in mice and in primary macrophage cultures. This review provides a brief summary of the clinical and epidemiologic features of these five bacterial infections, with a focus on the fundamental biologic facets of infection, and recent advances in host recognition. In addition, knowledge gaps regarding the innate recognition of these bacteria in the context of disease pathogenesis are discussed.https://www.scienceopen.com/hosted-document?doi=10.15212/ZOONOSES-2021-0011
spellingShingle James R. Fisher
Zachary D. Chroust
Florence Onyoni
Lynn Soong
Pattern Recognition Receptors in Innate Immunity to Obligate Intracellular Bacteria
Zoonoses
title Pattern Recognition Receptors in Innate Immunity to Obligate Intracellular Bacteria
title_full Pattern Recognition Receptors in Innate Immunity to Obligate Intracellular Bacteria
title_fullStr Pattern Recognition Receptors in Innate Immunity to Obligate Intracellular Bacteria
title_full_unstemmed Pattern Recognition Receptors in Innate Immunity to Obligate Intracellular Bacteria
title_short Pattern Recognition Receptors in Innate Immunity to Obligate Intracellular Bacteria
title_sort pattern recognition receptors in innate immunity to obligate intracellular bacteria
url https://www.scienceopen.com/hosted-document?doi=10.15212/ZOONOSES-2021-0011
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