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Updated: Sep 9, 2025
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Intravenous Endotoxin Challenge in Healthy Humans: An Experimental Platform to Investigate and Modulate Systemic Inflammation
Published on: May 16, 2016
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Inflamm-aging as a diverse and context-dependent process: From species and population differences to individual
Maximilien Franck1, Camille Daunizeau2, Jacob E Aronoff3
1Research Center on Aging, Faculty of Medicine and Health Sciences, University of Sherbrooke, Sherbrooke, QC, Canada.
Ageing Research Reviews
|August 31, 2025
Summary
Inflamm-aging, or age-related inflammation, is not universal but context-dependent. Its specific manifestation varies based on evolutionary history and environmental exposures, not a single aging signature.
Area of Science:
- Evolutionary biology
- Immunology
- Anthropology
Background:
- Inflamm-aging is considered a hallmark of aging, but its universality is debated.
- Emerging evidence suggests inflammation's role in aging is more complex than previously thought.
Purpose of the Study:
- To re-examine inflamm-aging through an eco-evolutionary perspective.
- To understand the context-dependent nature of inflammation across biological scales.
- To explore how evolutionary and environmental factors shape inflamm-aging trajectories.
Main Methods:
- Integrated mechanistic, evolutionary, comparative, anthropological, genetic, and environmental evidence.
- Analyzed data from non-industrialized populations to contrast with industrialized exposomes.
- Examined inflammation as a flexible stress response system.
Main Results:
- Inflammatory mechanisms are flexible stress responses regulated by biological context.
- Population-specific evolutionary histories and environments influence inflamm-aging.
- A universal signature of inflamm-aging is unlikely; specific triggers vary.
Conclusions:
- Inflamm-aging is a norm of reaction, with phenotypic expression varying by genotype and environment.
- The universality of inflamm-aging depends on its definition: broad inflammatory activation vs. specific profiles.
- Future research should focus on ecological, evolutionary, and environmental modulation of age-related inflammation.
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