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Tytuł pozycji:

Expression of Bacillus cereus Virulence-Related Genes in an Ocular Infection-Related Environment.

Tytuł :
Expression of Bacillus cereus Virulence-Related Genes in an Ocular Infection-Related Environment.
Autorzy :
Coburn PS; Department of Ophthalmology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA.
Miller FC; Department of Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA.; Department of Family and Preventive Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA.
Enty MA; Department of Ophthalmology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA.
Land C; Department of Ophthalmology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA.
LaGrow AL; Department of Ophthalmology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA.
Mursalin MH; Department of Microbiology and Immunology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA.
Callegan MC; Department of Ophthalmology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA.; Department of Microbiology and Immunology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA.; Dean McGee Eye Institute, Oklahoma City, OK 73104, USA.
Pokaż więcej
Źródło :
Microorganisms [Microorganisms] 2020 Apr 22; Vol. 8 (4). Date of Electronic Publication: 2020 Apr 22.
Typ publikacji :
Journal Article
Język :
English
Imprint Name(s) :
Original Publication: Basel, Switzerland : MDPI AG, [2013]-
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Grant Information :
Equipment Grant to REA Presbyterian Health Foundation; R21EY028066 United States EY NEI NIH HHS; R01EY024140 United States EY NEI NIH HHS; P30EY027125 United States NH NIH HHS; R21 EY028066 United States EY NEI NIH HHS; P30 EY021725 United States EY NEI NIH HHS; R01 EY024140 United States EY NEI NIH HHS; R01 EY028810 United States EY NEI NIH HHS; R01EY028810 United States EY NEI NIH HHS; Research Support Grant to MCC Presbyterian Health Foundation; Unrestricted grant to Dean McGee Eye Institute Research to Prevent Blindness
Contributed Indexing :
Keywords: Bacillus cereus; endophthalmitis; ocular environment; ocular infections; virulence determinants; vitreous
Entry Date(s) :
Date Created: 20200426 Latest Revision: 20200928
Update Code :
20210914
PubMed Central ID :
PMC7232466
DOI :
10.3390/microorganisms8040607
PMID :
32331252
Czasopismo naukowe
Bacillus cereus produces many factors linked to pathogenesis and is recognized for causing gastrointestinal toxemia and infections. B. cereus also causes a fulminant and often blinding intraocular infection called endophthalmitis. We reported that the PlcR/PapR system regulates intraocular virulence, but the specific factors that contribute to B. cereus virulence in the eye remain elusive. Here, we compared gene expression in ex vivo vitreous humor with expression in Luria Bertani (LB) and Brain Heart Infusion (BHI) broth by RNA-Seq. The expression of several cytolytic toxins in vitreous was less than or similar to levels observed in BHI or LB. Regulators of virulence genes, including PlcR/PapR, were expressed in vitreous. PlcR/PapR was expressed at low levels, though we reported that PlcR-deficient B. cereus was attenuated in the eye. Chemotaxis and motility genes were expressed at similar levels in LB and BHI, but at low to undetectable levels in vitreous, although motility is an important phenotype for B. cereus in the eye. Superoxide dismutase, a potential inhibitor of neutrophil activity in the eye during infection, was the most highly expressed gene in vitreous. Genes previously reported to be important to intraocular virulence were expressed at low levels in vitreous under these conditions, possibly because in vivo cues are required for higher level expression. Genes expressed in vitreous may contribute to the unique virulence of B. cereus endophthalmitis, and future analysis of the B. cereus virulome in the eye will identify those expressed in vivo, which could potentially be targeted to arrest virulence.

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