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Science 17 September 1993:
Vol. 261. no. 5128, pp. 1594 - 1597
DOI: 10.1126/science.8372355
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Articles

Science, Vol 261, Issue 5128, 1594-1597
Copyright © 1993 by American Association for the Advancement of Science

articles

Neuroblast specification and formation regulated by wingless in the Drosophila CNS

Q Chu-LaGraff and CQ Doe

Department of Cell and Structural Biology, University of Illinois, Urbana 61801.

The Drosophila central nervous system (CNS) develops from a heterogeneous population of neural stem cells (neuroblasts), yet the genes regulating neuroblast determination remain unknown. The segmentation gene wingless is regionally expressed in the neuroectoderm from which neuroblasts develop. A conditional wingless mutation is used to inactivate CNS function without affecting segmentation. The stripe of wingless-expressing neuroectoderm generates apparently normal neuroblasts after wingless inactivation; however, adjacent anterior and posterior neuroectoderm requires wingless nonautonomously for subsequent neuroblast determination and formation. Loss of wingless results in the absence or duplication of identified neuroblasts, highlighting its role in generating neuroblast diversity in the CNS.


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