Scientists discover a major brain shift between ages 50 and 75
A new study reveals that the human brain undergoes significant changes in genome regulation between the ages of 50 and 75, particularly within immune cells called microglia. These findings suggest that the replacement of embryonic microglia with blood-derived cells may contribute to age-related neurodegenerative diseases.
Why it matters
Understanding these midlife biological shifts is crucial for developing potential treatments or preventative measures for conditions like Alzheimer's disease.
Researchers have found that the human brain begins undergoing broad changes in the way its genome is regulated starting in midlife. The findings may help explain why age is the strongest risk factor for neurodegenerative conditions such as Alzheimer's disease.
In a new study published in Science , scientists used advanced single-cell methods to examine gene regulation and three-dimensional genome organization in individual cells from the human hippocampus, a brain region essential for learning and memory. By analyzing samples from adults across a wide range of ages, the team created one of the most detailed pictures yet of how genome regulation shifts as the brain grows older.
Brain Immune Cells Undergo a Major Midlife Shift
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