AI Summary

Researchers have identified a primate‑specific DNA change that may link to dementia‑related neurodegeneration. The change involves abnormal recombination between Alu elements, short sequences that appear only in primate genomes and make up about 10 % of the human genome. When Alu elements misalign, they can delete the genetic material that lies between them, potentially disrupting brain‑related genes. Because mice lack Alu elements, conventional animal models have struggled to capture this mechanism, highlighting the need for primate‑based studies to better understand human brain disease.

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