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Role of proapoptotic BH3-only proteins inListeria monocytogenesinfection
- Source :
- European journal of immunology
- Publication Year :
- 2016
- Publisher :
- Wiley, 2016.
-
Abstract
- The ability of pathogens to influence host cell survival is a crucial virulence factor. Listeria monocytogenes (Lm) infection is known to be associated with severe apoptosis of hepatocytes and spleen cells. This impairs host defense mechanisms and thereby facilitates the spread of intracellular pathogens. The general mechanisms of apoptosis elicited by Lm infection are understood, however, the roles of BH3-only proteins during primary Lm infection have not been examined. To explore the roles of BH3-only proteins in Lm-induced apoptosis, we studied Listeria infections in mice deficient in Bim, Bid, Noxa or double deficient in BimBid or BimNoxa. We found that BimNoxa double knockout mice were highly resistant to high-dose challenge with Listeria. Decreased bacterial burden and decreased host cell apoptosis were found in the spleens of these mice. The ability of the BH3-deficient mice to clear bacterial infection more efficiently than WT was correlated with increased concentrations of ROS, neutrophil extracellular DNA trap release and downregulation of TNF-α. Our data show a novel pathway of infection-induced apoptosis that enhances our understanding of the mechanism by which BH3-only proteins control apoptotic host cell death during Listeria infection.
- Subjects :
- Male
0301 basic medicine
Neutrophils
Immunology
Gene Expression
Apoptosis
Biology
Listeria infection
medicine.disease_cause
Extracellular Traps
Virulence factor
Microbiology
Mitochondrial Proteins
Mice
03 medical and health sciences
Listeria monocytogenes
medicine
Animals
Immunology and Allergy
Listeriosis
Disease Resistance
Mice, Knockout
Bcl-2-Like Protein 11
Intracellular parasite
Neutrophil extracellular traps
medicine.disease
biology.organism_classification
3. Good health
Survival Rate
Disease Models, Animal
030104 developmental biology
Neutrophil Infiltration
Proto-Oncogene Proteins c-bcl-2
Listeria
Cytokines
Female
Tumor necrosis factor alpha
Disease Susceptibility
biological phenomena, cell phenomena, and immunity
Reactive Oxygen Species
Spleen
BH3 Interacting Domain Death Agonist Protein
Subjects
Details
- ISSN :
- 00142980
- Volume :
- 46
- Database :
- OpenAIRE
- Journal :
- European Journal of Immunology
- Accession number :
- edsair.doi.dedup.....d16f948fd55c1d1ec057a19178376dde