Largest Map of Gene Activity to Date May Hold Clues to Alzheimer’s and Other Brain Diseases
Learn how brain tissue donated to science after death gives clues about genetic changes in neurological disorders and how we might target them better in future patients.
A groundbreaking research project, initiated in 2019, has created the largest map of gene activity to date, focusing on the prefrontal cortex, a brain region associated with decision-making, planning, and emotional regulation. This area is linked to a range of neurological diseases, including dementia, Parkinson's, and bipolar disorder.
The map was built using postmortem brain tissue from nearly 1,500 individuals, spanning from infants to those 108 years old, representing various backgrounds and both healthy individuals and those with neurological diseases.
The researchers used single-cell RNA sequencing to determine which genes were active in each cell, measuring gene activity in over 6 million brain cells. They identified three stages of change in the dorsolateral prefrontal cortex, linked to age, where it first remodels in youth, stays stable in midlife, and remodels again after 65.
By mapping these stages and analyzing gene activity in different cell types, they found that even diseases with distinct mechanisms and symptoms share similarities at the molecular level. For instance, immune cell genetic activity in Alzheimer's and Parkinson's showed several genetic changes in common. They also discovered molecular pathways connecting Alzheimer's with behavioral symptoms.
The research team hopes that this comprehensive map will facilitate personalized treatments for neurological diseases based on an individual's genetic makeup. They have made all data and analytical instructions publicly available, encouraging other researchers to build upon their work. This monumental achievement represents a significant step forward in understanding the molecular changes in neurological diseases, offering hope for more effective and personalized treatments in the future.
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