Research Project
Grant-in-Aid for Scientific Research (A)
Innervation of cerebellar Purkinje cells (PCs) by parallel fibers (PFs) and climbing fibers (CFs) is one of the best model system for synaptic circuit development and maturation. Through our previous analysis on PF synapse-specific molecule GluRd2, we have shown that this molecule strengthens synaptogenesis by PFs. Without GluRd2, PF-PCPC synapses are markedly reduced in number, and many PC spines on distal dendrites became free of synaptic contact (Kurihara et al.,1997, J.Neurosci.17:9613-9623). In this research project, we aimed to clarify what happens for CF in nervation under weakened PF synaptogenesis. By employing anterograde tracer labeling and immunolabeling, distal extension of CF in nervation was shown to occur in GluRd2 knockout mice and innervated free spines on distal dendrites of the PC. The distal extension further occurred against distal dendrites on adjacent PCs, resulting in multiple CF in nervation (Hahimoto et al.,2001;J.Neurosci.21:9701-9712 ; Ichikawa et al.,2002, J.Neurosci.22:8487-8503). These results indicate that synaptogenesis on PC dendrites stands on active competition between PF and CF, in which GluRd2 strengthens PF innervation to distal dendrites. Furthermore, we further revealed that P/Q-type calcium channel alpha-1A, which is activated by CF and induces calcium influx to PC dendrites, is the molecular mechanism that strengthens in nervation by a single major CF at proximal dendrites and expels other lesser CFs and PFs from the dendrites (Miyazaki et al.,2004, J.Neurosci.24:1734-1743).
All 2004 2003 2002 Other
All Journal Article (74 results)
J.Neurosci. 24
Pages: 1734-1743
Genes Cells 9
Pages: 1-14
J.Biol.Chem. 279
Pages: 3573-3577
Eur.J.Neurosci. 19
Pages: 552-569
Pages: 2682-2692
J.Neurochem. 89
Pages: 1454-1461
Eur.J.Neurosci. 20
Pages: 144-160
Hippocampus 14
Pages: 193-215
Pages: 5766-5777
Pages: 9292-9304
Pages: 17634-17639
Neurosci.Lett. 97
Pages: 97-101
Mol Brain Res. 125
Pages: 60-75
J.Neurochem. 90
Pages: 526-536
Neurosci.Lett. 369
Pages: 173-178
J.Cell Biol. 167
Pages: 293-302
Neurosci.Lett. 364
Pages: 101-105
Pages: 2929-2944
Neurosci.Res. 50
Pages: 369-374
Eur.J.Neurosci 20
Pages: 3301-3312
Genes Cells. 9
Hippocampus. 14
J.Biol.Chem. 27
Pages: 2029-2944
J Neurosci 23
Pages: 550-560
Eur J Neurosci 17
Pages: 545-554
Proc Natl Acad Sci USA 100
Pages: 4855-4860
Dev.Brain Res. 140
Pages: 263-268
Eur.J.Neurosci. 17
Pages: 2503-2520
Pages: 2563-2572
J.Comp.Neurol. 463
Pages: 237-248
J.Neurosci. 23
Pages: 8098-8108
Dev.Biol. 263
Pages: 216-230
Neurol. 61
Pages: 891-896
Arch.Histol.Cytol. 66
Pages: 109-121
Pages: 429-436
J Neurosci. 23
Eur J Neurosci. 17
Proc Natl Acad Sci USA. 100
J Neurosci 22
Pages: 803-814
Neurosci Res 43
Pages: 239-250
Science 297
Pages: 211-218
Pages: 8487-8503
Pages: 8379-8390
J Neurochem 83
Pages: 797-806
J Cereb Blood Flow Metab 22
Pages: 1327-1335
Anat.Sci.Int. 77
Pages: 94-108
J Biochem 132
Pages: 463-470
Eur J Neurosci 16
Pages: 868-876
Science. 297
J Neurosci. 22
J Cereb Blood Flow Metab. 22
Eur J Neurosci. 16
EMBO report. (印刷中)
J.Neurochem (印刷中)
Eur.J.Neurosci. (印刷中)
J.Neurosci. (印刷中)
EMBO report. (in press)
J.Neurochem. (in press)
Eur.J.Neurosci. (in press)
J.Neurosci. (in press)