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Requirement for the homeobox gene Hb9 in the consolidation of motor neuron identity

Arber, S. and Han, B. and Mendelsohn, M. and Smith, M. and Jessell, T. M. and Sockanathan, S.. (1999) Requirement for the homeobox gene Hb9 in the consolidation of motor neuron identity. Neuron, Vol. 23, H. 4. pp. 659-674.

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Official URL: http://edoc.unibas.ch/dok/A5259095

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Abstract

The homeobox gene Hb9, like its close relative MNR2, is expressed selectively by motor neurons (MNs) in the developing vertebrate CNS. In embryonic chick spinal cord, the ectopic expression of MNR2 or Hb9 is sufficient to trigger MN differentiation and to repress the differentiation of an adjacent population of V2 interneurons. Here, we provide genetic evidence that Hb9 has an essential role in MN differentiation. In mice lacking Hb9 function, MNs are generated on schedule and in normal numbers but transiently acquire molecular features of V2 interneurons. The aberrant specification of MN identity is associated with defects in the migration of MNs, the emergence of the subtype identities of MNs, and the projection of motor axons. These findings show that HB9 has an essential function in consolidating the identity of postmitotic MNs.
Faculties and Departments:05 Faculty of Science > Departement Biozentrum > Neurobiology > Cell Biology (Arber)
UniBasel Contributors:Arber, Silvia
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:Cell Press
ISSN:0896-6273
Note:Publication type according to Uni Basel Research Database: Journal article
Last Modified:22 Mar 2012 14:20
Deposited On:22 Mar 2012 13:21

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