کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10933552 1093802 2009 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Autonomous turning of cerebellar granule cells in vitro by intrinsic programs
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی بیولوژی سلول
پیش نمایش صفحه اول مقاله
Autonomous turning of cerebellar granule cells in vitro by intrinsic programs
چکیده انگلیسی
External guidance cues play a role in controlling neuronal cell turning in the developing brain, but little is known about whether intrinsic programs are also involved in controlling the turning. In this study, we examined whether granule cells undergo autonomous changes in the direction of migration in the microexplant cultures of the early postnatal mouse cerebellum. We found that granule cells exhibit spontaneous and periodical turning without cell-cell contact and in the absence of external guidance cues. The frequency of turning was increased by stimulating the Ca2+ influx and the internal Ca2+ release, or inhibiting the cAMP signaling pathway, while the frequency was reduced by inhibiting the Ca2+ influx. Granule cell turning in vitro was classified into four distinct modes, which were characterized by the morphological changes in the leading process and the trailing process, such as bifurcating, turning, withdrawing, and changing the polarity. The occurrence of the 1st and 2nd modes of turning was differentially affected by altering the Ca2+ and cAMP signaling pathways. Collectively, the results demonstrate that intrinsic programs regulate the autonomous turning of cerebellar granule cells in vitro. Furthermore, the results suggest that extrinsic signals play a role as essential modulators of intrinsic programs.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Developmental Biology - Volume 326, Issue 1, 1 February 2009, Pages 237-249
نویسندگان
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