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The problem of neuronal cell types: a physiological genomics approach
Sacha B Nelson1, Ken Sugino, Chris M Hempel
1Department of Biology and National Center for Behavioral Genomics, Brandeis University, MS 008, 415 South Street, Waltham, MA 02454-9110, USA. nelson@brandeis.edu
Trends in Neurosciences
|May 23, 2006
Summary
Understanding brain cell diversity is key. Gene expression profiling and mouse genetic tools can objectively classify neuronal types and investigate their roles in brain circuits.
Area of Science:
- Neuroscience
- Genomics
- Cell Biology
Background:
- Vertebrate brains exhibit high cell diversity, but the exact number of distinct neuronal types remains debated.
- Cortical interneurons, for example, may represent a few, dozens, or over 100 unique cell types.
Purpose of the Study:
- To advocate for broader application of genome-wide gene expression profiling for objective neuronal classification.
- To promote coupling gene expression data with large-scale mouse genetic tools for functional studies.
Main Methods:
- Utilizing microarrays for genome-wide gene expression profiling of specific neuronal cell types.
- Developing mouse driver lines expressing genetic manipulation tools (e.g., Cre recombinase) in identified cell types.
Main Results:
- Gene expression profiles provide an objective basis for classifying neuronal cell types.
- This approach enables systematic investigation of gene roles in cellular phenotypes and cell type functions.
Conclusions:
- Widespread gene expression profiling and genetic tool development are crucial for advancing our understanding of neural circuit complexity.
- These integrated approaches will facilitate systematic research into the roles of specific genes and cell types in brain function and cognition.
