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- W2015014955 abstract "The causative agent of anthrax, Bacillus anthracis, is capable of circumventing the humoral and innate immune defense of the host and modulating the blood chemistry in circulation to initiate a productive infection. It has been shown that the pathogen employs a number of strategies against immune cells using secreted pathogenic factors such as toxins. However, interference of B. anthracis with the innate immune system through specific interaction of the spore surface with host proteins such as the complement system has heretofore attracted little attention. In order to assess the mechanisms by which B. anthracis evades the defense system, we employed a proteomic analysis to identify human serum proteins interacting with B. anthracis spores, and found that plasminogen (PLG) is a major surface-bound protein. PLG efficiently bound to spores in a lysine- and exosporium-dependent manner. We identified α-enolase and elongation factor tu as PLG receptors. PLG-bound spores were capable of exhibiting anti-opsonic properties by cleaving C3b molecules in vitro and in rabbit bronchoalveolar lavage fluid, resulting in a decrease in macrophage phagocytosis. Our findings represent a step forward in understanding the mechanisms involved in the evasion of innate immunity by B. anthracis through recruitment of PLG resulting in the enhancement of anti-complement and anti-opsonization properties of the pathogen." @default.
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- W2015014955 date "2011-03-25" @default.
- W2015014955 modified "2023-10-16" @default.
- W2015014955 title "Bacillus anthracis Interacts with Plasmin(ogen) to Evade C3b-Dependent Innate Immunity" @default.
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- W2015014955 doi "https://doi.org/10.1371/journal.pone.0018119" @default.
- W2015014955 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3064659" @default.
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