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Spatiotemporal expression and functional implication of CXCL14 in the developing mice cerebellum

Authors
Park, Cho RongKim, Dong-KyuCho, Eun BeeYou, Dong-Joodo Rego, Jean LucVaudry, DavidSun, WoongKim, HyunSeong, Jae YoungHwang, Jong-Ik
Issue Date
9월-2012
Publisher
KOREAN SOC MOLECULAR & CELLULAR BIOLOGY
Keywords
cerebellum; chemokine; CXCL14; granule cells; migration
Citation
MOLECULES AND CELLS, v.34, no.3, pp.289 - 293
Indexed
SCIE
SCOPUS
KCI
Journal Title
MOLECULES AND CELLS
Volume
34
Number
3
Start Page
289
End Page
293
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/107569
DOI
10.1007/s10059-012-0116-0
ISSN
1016-8478
Abstract
Cerebellar granule neurons migrate from the external granule cell layer (EGL) to the internal granule cell layer (IGL) during postnatal morphogenesis. This migration process through 4 different layers is a complex mechanism which is highly regulated by many secreted proteins. Although chemokines are well-known peptides that trigger cell migration, but with the exception of CXCL12, which is responsible for prenatal EGL formation, their functions have not been thoroughly studied in granule cell migration. In the present study, we examined cerebellar CXCL14 expression in neonatal and adult mice. CXCL14 mRNA was expressed at high levels in adult mouse cerebellum, but the protein was not detected. Nevertheless, Western blotting analysis revealed transient expression of CXCL14 in the cerebellum in early postnatal days (P1, P8), prior to the completion of granule cell migration. Looking at the distribution of CXCL14 by immunohistochemistry revealed a strong immune reactivity at the level of the Purkinje cell layer and molecular layer which was absent in the adult cerebellum. In functional assays, CXCL14 stimulated transwell migration of cultured granule cells and enhanced the spreading rate of neurons from EGL microexplants. Taken together, these results revealed the transient expression of CXCL14 by Purkinje cells in the developing cerebellum and demonstrate the ability of the chemokine to stimulate granule cell migration, suggesting that it must be involved in the postnatal maturation of the cerebellum.
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