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Tracing the Evolution of Human Immunity Through Ancient DNA
Etienne Patin1, Lluis Quintana-Murci2,1
1Institut Pasteur, Université Paris Cité, CNRS UMR 2000, Human Evolutionary Genetics Unit, Paris, France;
Annual Review of Immunology
|December 20, 2024
Summary
Ancient DNA reveals how human immunity evolved through interbreeding and adaptation to diseases. Genetic risk for autoimmune disorders may stem from past infection resistance, highlighting a complex evolutionary past.
Area of Science:
- Evolutionary genetics
- Paleogenomics
- Immunology
Background:
- Infectious diseases have profoundly shaped human evolution and immunity.
- Ancient DNA studies offer novel insights into the evolutionary history of human immune systems.
Purpose of the Study:
- To review how ancient DNA and genomics advance our understanding of human immunity evolution.
- To explore genetic adaptations to historical infections and cultural shifts.
Main Methods:
- Analysis of ancient DNA from modern humans, Neanderthals, and Denisovans.
- Genomic tracking of immune gene evolution across different historical periods and populations.
Main Results:
- Interbreeding with archaic humans influenced modern immune responses, especially to viruses.
- Human immunity shows strong selection since the European Bronze Age and adaptations to epidemics.
- Genetic risk for autoimmune disorders may be linked to ancestral resistance to infections.
Conclusions:
- Ancient genomics provides a powerful lens for understanding human immunity evolution.
- Past adaptations for infection resistance may contribute to modern non-infectious immune disorders.
- Further research is needed to include diverse global populations for a comprehensive view.
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