Resilience to Bacterial Infection: Difference between Species Could Be Due to Proteins in Serum
Open accessAbstract
Vertebrates vary in resistance and resilience to infectious diseases, and the mechanisms that regulate the trade-off between these often opposing protective processes are not well understood. Variability in the sensitivity of species to the induction of damaging inflammation in response to equivalent pathogen loads (resilience) complicates the use of animal models that reflect human disease. We found that induction of proinflammatory cytokines from macrophages in response to inflammatory stimuli in vitro is regulated by proteins in the sera of species in inverse proportion to their in vivo resilience to lethal doses of bacterial lipopolysaccharide over a range of 10,000-fold. This finding suggests that proteins in serum rather than intrinsic cellular differences may play a role in regulating variations in resilience to microbe-associated molecular patterns between species. The involvement of circulating proteins as key molecules raises hope that the process might be manipulated to create better animal models and potentially new drug targets.
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TLR4 on murine KCs is less responsive, meaning that mice exhibit a weaker response to bacteria and bacterial products.
“Treg, while TLR4 on murine KCs is less responsive meaning that mice exhibit a weaker response to bacteria and bacterial products(53).”
From The liver as a central "hub" of the immune system: pathophysiological implications (2025) · cites this paper as [53]
The Results (whole-blood comparison; page not provided) show that mouse blood produced much less TNF and IL-6 than human blood after exposure to bacterial products or heat-killed bacteria. But the Introduction says isolated mouse macrophages respond to TLR agonists at roughly similar concentrations to human cells, and the paper does not establish that TLR4 on murine Kupffer cells (KCs) is intrinsically less responsive. (LLM, conf=0.88)
Experimental — accuracy not yet measuredTLR2 and TLR9 participate in alcohol-mediated liver injury by inducing CXCL1 expression and neutrophil infiltration.
“TLR2 and TLR9 participate in alcohol-mediated liver injury by inducing CXCL1 expression and neutrophil infiltration (53).”
From The liver as a central "hub" of the immune system: pathophysiological implications (2025) · cites this paper as [53]
The Results section discusses TLR2 agonists and TNF production in monocytes, while the Discussion addresses responses to bacterial infection. A search for alcohol-mediated liver injury, CXCL1, TLR9, and neutrophil infiltration found no passage addressing the claimed mechanism; no page numbers were available in our copy. (LLM, conf=0.75)
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References 35 · Cited by 269
Research works printed but not linked: 36
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- Authors
- Warren, H. S., Fitting, C., Hoff, E., Adib‐Conquy, M., Beasley‐Topliffe, L., Tesini, B., Liang, X., Valentine, C., Hellman, J., Hayden, D., & Cavaillon, J.
- Affiliations
- Institut Pasteur (FR)
- Massachusetts General Hospital (US)
- Corresponding author
- Warren, H. Shaw
- Venue
- The Journal of Infectious Diseases
- Publisher
- Oxford University Press (OUP)
- Published
- 2010-01-15
- Volume
- 201
- Issue
- 2
- Pages
- 223-232
- ISSN
- 0022-1899 (ISSN-L)
- 1537-6613
- PMC
- PMC2798011
- OpenAlex
- W2162114403
- Cited by
- 269
- References
- 35
- Citations by year
- 2026: 10 · 2025: 13 · 2024: 20 · 2023: 12 · 2022: 16 · 2021: 20 · 2020: 20 · 2019: 26 · 2018: 23 · 2017: 17 · 2016: 16 · 2015: 13 · 2014: 21 · 2013: 14 · 2012: 16
- FWCI
- 4.03
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- Locations
- The Journal of Infectious Diseases (publishedVersion)
- PubMed (publishedVersion)
- Europe PMC (PubMed Central) (acceptedVersion)
- PubMed Central (acceptedVersion)
- Funders
- National Institute of General Medical Sciences (R01GM059694, GM 59694)
- National Institute of Allergy and Infectious Diseases (AI059010, R01AI059010, T32AI007061)
- Topics
- Life Sciences › Immunology and Microbiology › Immunology › Immune Response and Inflammation
- Health Sciences › Medicine › Epidemiology › Sepsis Diagnosis and Treatment
- Life Sciences › Immunology and Microbiology › Immunology › Inflammation biomarkers and pathways
- Keywords
- bacterial lipopolysaccharide, serum proteins, inflammatory cytokines, macrophages, inflammation, interspecies variation, microbe-associated molecular patterns, animal models of infection, host defense
- MeSH terms
- Animals, Bacterial Outer Membrane Proteins, Cardenolides, Cells, Cultured, Disease Models, Animal, Humans, Immunity, Innate, Lipoproteins, Macrophage Activation, Macrophages, Peptidoglycan, Saponins, Species Specificity, Bacteremia, Escherichia coli Proteins, Mice
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