Granule cell raphes in the developing mouse cerebellum

被引:38
|
作者
Luckner, R
Obst-Pernberg, K
Hirano, S
Suzuki, ST
Redies, C
机构
[1] Univ Essen, Sch Med, Inst Anat, D-45122 Essen, Germany
[2] Aichi Human Serv Ctr, Inst Dev Res, Kasugai, Aichi 4800392, Japan
关键词
pattern formation; migration; Purkinje cells; cell adhesion molecules; cadherin; mouse (C57BL);
D O I
10.1007/s004410000292
中图分类号
Q2 [细胞生物学];
学科分类号
071009 ; 090102 ;
摘要
T(h)e cerebellar cortex of many vertebrates shows a striking parasagittal compartmentation that is thought to play a role in the establishment and maintenance of functional cerebellar connectivity. Here, we demonstrate the existence of multiple parasagittal raphes of cells in the molecular layer of the developing cerebellar cortex of postnatal mouse. The histological appearance and immunostaining profile of the raphe cells suggest that they are migrating granule cells. We therefore conclude that the granule cell raphes previously described in birds also exist in a mammalian species. The raphes in mouse are visible on nuclear stains from around birth to postnatal day 6 and are frequently found at the boundaries of Purkinje cell segments that differentially express cadherins ("early-onset" parasagittal banding pattern). A similar relation between the raphe pattern and various markers for the early-onset banding pattern has been found in the chicken cerebellum. One of the cadherins mapped in the present study (OL-protocadherin) continues to be expressed in specific Purkinje cell segments until at least postnatal day 14. At this stage of development, the borders of the OL-protocadherin-positive Purkinje cell segments coincide with the borders of Purkinje cell segments that express zebrin II, a marker for the "late-onset" parasagittal banding pattern which persists in the adult cerebellum. These findings demonstrate that the early-onset banding pattern, as reflected in the complementary arrangement of raphes/Purkinje cell segments, and the late-onset pattern of zebrin II expression share at least some positional cues during development.
引用
收藏
页码:159 / 172
页数:14
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