Nuclear locale sways gene activity during brain development
Researchers have discovered that the physical position of genes within the cell nucleus, specifically their proximity to nuclear speckles, influences their activity during brain development. This finding suggests that nuclear architecture plays a critical role in gene regulation, potentially explaining mechanisms behind neurodevelopmental conditions like autism.
Why it matters
This research provides a new framework for understanding gene expression beyond traditional chemical tagging, offering potential new avenues for diagnosing and treating neurodevelopmental disorders.
As neural stem cells mature into neurons, developmental genes move from the edge of the cell nucleus toward structures called nuclear speckles—a shift associated with increased gene activity, a study of developing human brain tissue found.
The findings suggest that a gene’s position inside the nucleus can influence whether it remains silent or becomes active.
Scientists have traditionally focused on chemical tags and regulatory proteins as the main controls on gene activity, says Yin Shen , associate professor of neurology at the University of California, San Francisco, who wasn’t involved in the study. Finding that where a gene sits inside the nucleus may also matter offers a new way to study normal brain development and neurodevelopmental conditions, she adds. “This work shifts the way we think about epigenetic regulation.”
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