NDLI: PKCδ regulates cortical radial migration by stabilizing the Cdk5 activator p35

Content Provider	PubMed Central
Author	Zhao, Chun-tao Li, Kun Li, Jun-tao Zheng, Wang Liang, Xu-jun Geng, An-qi Li, Ning Yuan, Xiao-bing
Abstract	Cyclin-dependent kinase 5 (Cdk5) and its activator p35 are critical for radial migration and lamination of cortical neurons. However, how this kinase is regulated by extracellular and intracellular signals during cortical morphogenesis remains unclear. Here, we show that PKCδ, a member of novel PKC expressing in cortical neurons, could stabilize p35 by direct phosphorylation. PKCδ attenuated the degradation of p35 but not its mutant derivative, which could not be phosphorylated by PKCδ. Down-regulation of PKCδ by in utero electroporation of specific small interference RNA (siRNA) severely impaired the radial migration of cortical neurons. This migration defect was similar to that caused by down-regulation of p35 and could be prevented by cotransfection with the wild-type but not the mutant p35. Furthermore, PKCδ could be activated by the promigratory factor brain-derived neurotrophic factor (BDNF) and was required for the activation of Cdk5 by BDNF. Both PKCδ and p35 were required for the promigratory effect of BDNF on cultured newborn neurons. Thus, PKCδ may promote cortical radial migration through maintaining the proper level of p35 in newborn neurons.
Related Links	http://dx.doi.org/10.1073/pnas.0812872106
Ending Page	21358
Page Count	6
Starting Page	21353
File Format	PDF
ISSN	00278424
e-ISSN	10916490
Journal	Proceedings of the National Academy of Sciences of the United States of America
Issue Number	50
Volume Number	106
Language	English
Publisher	National Academy of Sciences
Publisher Date	2009-12-15
Access Restriction	Open
Rights Holder	National Academy of Sciences
Subject Keyword	General Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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