title: Expression and possible role of neuronal calcium sensor-1 in the cerebellum.
abstract: Neuronal calcium sensor-1 (NCS-1) is a member of EF-hand calcium-binding protein superfamily, which is considered to modulate synaptic transmission and plasticity. In this mini-review, we first summarize distribution of NCS-1 in the cerebellum. NCS-1 is mainly detected in postsynaptic sites, such as somata and dendrites of Purkinje cells, stellate/basket cells and granule cells. In addition, GABAergic inhibitory stellate/basket cell axon terminals also contain NCS-1. Secondly, we describe cerebellar compartmentation defined by NCS-1. The NCS-1 immunostaining displayed characteristic parasagittal-banding pattern in the Purkinje cell layer and molecular layer, whereas there were no apparent bands in the granule cell layer. The alternating positively and negatively NCS-1-labeled Purkinje cell clusters contributed to this cerebellar compartmentation. In contrast, stellate/basket cells were uniformly NCS-1-positive throughout the cerebellum. Interestingly, NCS-1 and zebrin II exhibited a similar parasagittal-banding pattern. But it is noteworthy that NCS-1-negative/zebrin II-positive Purkinje cell clusters were detected selectively in anterior lobule vermis and paraflocculus. These results suggest that NCS-1 defines a novel pattern of cerebellar cortical compartmentation. Lastly, we describe recent data suggesting some relationship between NCS-1 and cerebellar long-term depression-related molecules, and discuss the possible role of NCS-1 in the cerebellum.
authors.affiliation: Department of Anatomy & Neurobiology, Graduate School of Medical Sciences, Kyushu University, Higashi-ku, Fukuoka, Japan. sjnno@med.kyushu-u.ac.jp
authors.forename: Shozo
authors.initials: S
authors.lastname: Jinno
authors.forename: Andreas
authors.initials: A
authors.lastname: Jeromin
authors.forename: Toshio
authors.initials: T
authors.lastname: Kosaka
mesh_terms: D000818:Animals; D002135:Calcium-Binding Proteins / Q000378:metabolism* / Q000502:physiology; D002531:Cerebellum / Q000166:cytology / Q000378:metabolism*; D006801:Humans; D007150:Immunohistochemistry; D009419:Nerve Tissue Proteins / Q000378:metabolism; D016571:Neural Networks, Computer; D051580:Neuronal Calcium-Sensor Proteins; D009474:Neurons / Q000378:metabolism*; D009479:Neuropeptides / Q000378:metabolism* / Q000502:physiology
chemical_list: D002135:Calcium-Binding Proteins; D009419:Nerve Tissue Proteins; D051580:Neuronal Calcium-Sensor Proteins; D009479:Neuropeptides; C101464:frequenin calcium sensor proteins; C071871:zebrin II