Molecular mapping of 8 million cells brings cerebral architecture into focus
University of California, Irvine researchers have mapped approximately 8 million cells in regions deep within the human brain, identifying 60 distinct types and revealing how they form cellular communities. The work offers a foundational reference for investigating brain systems affected by Parkinson's disease, Huntington's disease and other neurological and psychiatric disorders.
Researchers at the University of California, Irvine have created a detailed map of approximately 8 million cells in deep regions of the human brain. This comprehensive atlas identifies 60 distinct cell types and reveals their organization into cellular communities within the basal ganglia, a cluster of structures involved in movement, motivation, and decision-making.
By examining both the molecular characteristics of cells and their spatial locations, scientists are building a precise picture of how these areas are structured and how changes may occur in diseases like Parkinson's and Huntington's.
The study, published in Cell, is one of two coordinated publications from the BRAIN Initiative Cell Atlas Network. UC Irvine's Center for Neural Circuit Mapping, led by Chancellor's Professor of Anatomy and Neurobiology Xiangmin Xu, played a central role in the research. The team employed spatial transcriptomics, a technique that measures gene activity while preserving the location of cells in tissue, to connect molecular cell identities with the brain's anatomy.
This approach allowed researchers to identify how different cell types are distributed within the basal ganglia. Certain supporting cells and specific neuron types were found in distinct areas of the brain. This spatial information provides insights that are not possible with a simple list of cell types alone. The atlas serves as a reference for investigating how brain disorders might alter these cellular communities, potentially leading to more targeted experimental models and therapeutic strategies.
UC Irvine's contribution extends beyond the atlas itself. The university also led a separate study published in Cell Systems that details the infrastructure needed for large-scale brain mapping projects. This includes standardized protocols for acquiring, preparing, and characterizing donated human brain tissue, as well as the anatomical documentation required for advanced molecular research.
The campus's brain procurement program partners with local coroners' offices, hospitals, and tissue recovery organizations to ensure a diverse and representative sample of human brain tissue is available for research.
Together, these studies demonstrate the importance of a comprehensive approach to brain mapping, from tissue procurement to spatial genomics. By establishing common frameworks and methods, UC Irvine is helping to create a collaborative framework for researchers around the world to compare findings and assess how discoveries in animal models translate to human biology.
This effort is part of a broader initiative by the BRAIN Initiative Cell Atlas Network to generate a common reference atlas of brain cell types, aiming to deepen our understanding of the brain's architecture and function.
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