Abstract：
:To elucidate the molecular mechanisms that regulate the maturation of action potential, we began by examining voltage-dependent K+ currents, known to contribute to the maturation of action potential, of developing granule cells in mouse cerebellar microexplant cultures. The migration of developing granule cells in this culture is reported to mimic the in vivo process, but their specific identification is still incomplete. In this study, we identified and characterized granule cells in this culture. Immunocytochemical analysis found that granule cells migrated radially out from explants and subsequently formed small clusters and also that their morphology changed from a bipolar to a T shape during migration. Moreover, in the electrophysiological study, the GABA response of granule cells in this culture clarified that the electrophysiological properties of granule cells were normally maintained. We therefore have concluded, that this culture system is a powerful tool for investigating the differentiation of cerebellar granule cells. Based on these findings, we recorded voltage-dependent K+ currents of developing granule cells in this culture, while concurrently observing their morphology. Our results show that voltage-dependent K+ currents of developing granule cells change from delayed rectifier to A current in parallel with their morphological changes from bipolar to T-shaped cells.
journal_name
Neurosci Resjournal_title
Neuroscience researchauthors
Wakazono Y,Kurahashi T,Nakahira K,Nagata I,Takayama C,Inoue Y,Kaneko A,Ikenaka Kdoi
10.1016/s0168-0102(97)00099-0subject
Has Abstractpub_date
1997-12-01 00:00:00pages
291-301issue
4eissn
0168-0102issn
1872-8111pii
S0168-0102(97)00099-0journal_volume
29pub_type
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