Mouse Brain Development pp 21-49

Part of the Results and Problems in Cell Differentiation book series (RESULTS, volume 30)

Mapping Genes that Modulate Mouse Brain Development: A Quantitative Genetic Approach

  • Robert W. Williams

Abstract

The complexity of CNS development is staggering. In mice a total of approximately 75 million neurons and 25 million glial cells are generated, moved, connected, and integrated into hundreds of different circuits over a period of 1 month. The process is coordinated by the expression of a large fraction of the genome — as many as 40 000 genes are involved (Sutcliffe 1988; Adams et al. 1993). These same genes coordinate the development of the human brain, but a thousand times more neurons are generated (Williams and Herrup 1988) and their integration and training take more than a decade. While 5000 of these genes have common roles in cellular metabolism, this still leaves a huge complement that have selective, transient, and partially redundant roles in the development of different parts of the brain (Usui et al. 1994; Gautvik et al. 1996). Reductionist approaches that focus on isolated processes and molecules may seem hopelessly inadequate, but they are an absolute necessity at this early stage of analysis and understanding.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • Robert W. Williams
    • 1
  1. 1.Center for Neuroscience and Department of Anatomy and NeurobiologyUniversity of TennesseeMemphisUSA

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