Abstract:
:In the early postnatal period, cerebellar granule cells exhibit an activity-dependent downregulation of a set of immaturation genes involved in cell growth and migration and are shifted to establishment of a mature network formation. Through the use of a granule cell culture and both pharmacological and RNA interference (siRNA) analyses, the present investigation revealed that the downregulation of these immaturation genes is controlled by strikingly unified signaling mechanisms that operate sequentially through the stimulation of AMPA and NMDA receptors, tetrodotoxin-sensitive Na(+) channels and Ca(2+)/calmodulin-dependent protein kinase II (CaMKII). This signaling cascade induces the Etv1 transcription factor, and knockdown of Etv1 by a siRNA technique prevented this activity-dependent downregulation of immaturation genes. Thus, taken into consideration the mechanism that controls the upregulation of maturation genes involved in synaptic formation, these results indicate that Etv1 orchestrates the activity-dependent regulation of both maturation and immaturation genes in developing granule cells and plays a key role in specifying the identity of mature granule cells in the cerebellum.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Okazawa M,Abe H,Nakanishi Sdoi
10.1016/j.bbrc.2016.04.017subject
Has Abstractpub_date
2016-05-13 00:00:00pages
1071-1077issue
4eissn
0006-291Xissn
1090-2104pii
S0006-291X(16)30512-5journal_volume
473pub_type
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