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Dying for a cause: The pathogenic manipulation of cell death and efferocytic pathways
Kelley N Cooper1,2, Jan Potempa2,3, Juhi Bagaitkar4,5
1Department of Immunology and Microbiology, University of Louisville, Louisville, Kentucky, USA.
Abstract:
Cell death is a natural consequence of infection. However, although the induction of cell death was solely thought to benefit the pathogen, compelling data now show that the activation of cell death pathways serves as a nuanced antimicrobial strategy that couples pathogen elimination with the generation of inflammatory cytokines and the priming of innate and adaptive cellular immunity. Following cell death, the phagocytic uptake of the infected dead cell by antigen-presenting cells and the subsequent lysosomal fusion of the apoptotic body containing the pathogen serve as an important antimicrobial mechanism that furthers the development of downstream adaptive immune responses. Despite the complexity of regulated cell death pathways, pathogens are highly adept at evading them. Here, we provide an overview of the remarkable diversity of cell death and efferocytic pathways and discuss illustrative examples of virulence strategies employed by pathogens, including oral pathogens, to counter their activation and persist within the host.
Insights
Cell death pathways eliminate pathogens and prime immunity. However, pathogens evade these crucial antimicrobial defenses, including oral pathogens, impacting host persistence.
Area of Science:
- Immunology
- Microbiology
- Cell Biology
Background:
- Cell death was traditionally viewed as beneficial to pathogens.
- Emerging evidence reveals cell death pathways as a sophisticated antimicrobial strategy.
- These pathways eliminate pathogens while stimulating immune responses.
Purpose of the Study:
- To provide an overview of regulated cell death and efferocytic pathways.
- To discuss pathogen evasion strategies targeting these pathways.
- To highlight the role of oral pathogens in evading cell death.
Main Methods:
- Literature review of cell death and efferocytosis.
- Analysis of pathogen virulence strategies.
- Case studies of pathogen-host interactions.
Main Results:
- Cell death pathways are crucial for pathogen clearance and immune priming.
- Phagocytosis of dead cells by antigen-presenting cells enhances adaptive immunity.
- Pathogens, including oral pathogens, have evolved diverse mechanisms to evade cell death.
Conclusions:
- Regulated cell death is a complex host defense mechanism.
- Pathogen evasion of cell death is a significant factor in host persistence.
- Understanding these interactions is vital for developing new therapeutic strategies.
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