Urbanization, environment, and inflammaging: insights from sub-Saharan Africa

Area of Science:

• Gerontology
• Immunology
• Environmental Health

Background:

• Inflammaging, a chronic low-grade inflammation associated with aging, is increasingly recognized but shows population-specific variations.
• Universal models of immune aging are challenged by this heterogeneity, necessitating research into environmental and ecological influences.
• Sub-Saharan Africa's rapid urbanization provides a unique context to study how environmental shifts impact inflammaging.

Purpose of the Study:

• To investigate the influence of urbanization and associated environmental changes on inflammaging.
• To compare inflammaging levels between indigenous and industrialized populations in sub-Saharan Africa.
• To assess the role of ecological context in shaping immune system aging.

Main Methods:

• Comparative analysis of inflammaging markers across diverse populations undergoing different stages of urbanization.
• Assessment of environmental exposures and lifestyle factors linked to urbanization.
• Evaluation of immune system aging indicators in relation to ecological settings.

Main Results:

• Significant variations in inflammaging were observed across different populations.
• Indigenous groups exhibited lower levels of inflammaging, potentially linked to adaptations to chronic infections.
• Industrialized populations showed heightened inflammation, suggesting an ecological imbalance related to environmental changes.

Conclusions:

• Inflammaging is not uniform and is significantly influenced by ecological and environmental factors.
• Urbanization in sub-Saharan Africa presents a natural experiment highlighting environmental impacts on immune aging.
• Future aging research must incorporate diverse ecological groups to develop comprehensive models of inflammaging.