Transient calretinin expression defines early postmitotic step of neuronal differentiation in adult hippocampal neurogenesis of mice

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Item Type:	Article
Title:	Transient calretinin expression defines early postmitotic step of neuronal differentiation in adult hippocampal neurogenesis of mice
Creators Name:	Brandt, M.D., Jessberger, S., Steiner, B., Kronenberg, G., Reuter, K., Bick-Sander, A., der Behrens, W. and Kempermann, G.
Abstract:	We here show that the early postmitotic stage of granule cell development during adult hippocampal neurogenesis is characterized by the transient expression of calretinin (CR). CR expression was detected as early as 1 day after labeling dividing cells with bromodeoxyuridine (BrdU), but not before. Staining for Ki-67 confirmed that no CR-expressing cells were in cell cycle. Early after BrdU, CR colocalized with immature neuronal marker doublecortin; and later with persisting neuronal marker NeuN. BrdU/CR-labeled cells were negative for GABA and GABAA1 receptor, but early on expressed granule cell marker Prox-1. After 6 weeks, no new neurons expressed CR, but all contained calbindin. Stimuli inducing adult neurogenesis have limited (enriched environment), strong (voluntary wheel running), and very strong effects on cell proliferation (kainate-induced seizures). In these models the induction of cell proliferation was paralleled by an increase of CR-positive cells, indicating the stimulus-dependent progression from cell division to a postmitotic stage.
Keywords:	Aging, Biological Models, Cell Differentiation, Cell Division, Controlled Environment, Dentate Gyrus, Homeodomain Proteins, Inbred C57BL Mice, Ki-67 Antigen, Microtubule-Associated Proteins, Motor Activity, Neurons, Neuropeptides, Seizures, Stem Cells, Vitamin D-Dependent Calcium-Binding Protein, Animals, Mice
Source:	Molecular and Cellular Neuroscience
ISSN:	1044-7431
Publisher:	Academic Press
Volume:	24
Number:	3
Page Range:	603-613
Date:	November 2003
Official Publication:	https://doi.org/10.1016/S1044-7431(03)00207-0
PubMed:	View item in PubMed

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