LIS-less Neurons Don't Even Make It to the Starting Gate

Overview

Journal J Cell Biol

Specialty Cell Biology

Date 2005 Sep 15

PMID 16157697

Citations 6

Authors

Mary E Hatten

Affiliations

Soon will be listed here.

Abstract

The manuscript by Tsai et al. (935-945) is a tour de force analysis of a controversial issue in developmental neurobiology, namely the molecular basis of the devastating human brain malformation, type I lissencephaly (Lis1) (Jellinger, K., and A. Rett. 1976. Neuropadiatrie. 7:66-91). For several decades, defects in neuronal migration have been assumed to underlie all defects in cortical histogenesis. In the paper by Tsai et al., the authors use a variety of elegant approaches, including the first real-time imaging of cortical neurons with reduced levels of LIS1, to demonstrate that LIS1 and dynactin act as regulators of dynein during cortical histogenesis. A loss of LIS1 results in both a failure to exit the cortical germinal zone and abnormal neuronal process formation. Thus, the primary action of the mutation is to disrupt the production of neurons in the developing brain as well as their migration.

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