کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6277634 | 1295769 | 2010 | 14 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The immediate large-scale dendritic plasticity of cortical pyramidal neurons subjected to acute epidural compression
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کلمات کلیدی
PBSMAP2PGPphosphate buffer - بافر فسفاتTaxol - تاکولTrauma - تروماMicrotubule - ریزلوله یا میکروتوبولCompression - فشرده سازیsensorimotor cortex - قشر حسگر حرکتیlucifer yellow - لوسیفر زردPhosphate-buffered saline - محلول نمک فسفات با خاصیت بافریprotein gene product - پروتئین محصول ژنMicrotubule associated protein 2 - پروتئین مرتبط با میکروتوبول 2
موضوعات مرتبط
علوم زیستی و بیوفناوری
علم عصب شناسی
علوم اعصاب (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Head trauma and acute disorders often instantly compress the cerebral cortex and lead to functional abnormalities. Here we used rat epidural bead implantation model and investigated the immediate changes following acute compression. The dendritic arbors of affected cortical pyramidal neurons were filled with intracellular dye and reconstructed 3-dimensionally for analysis. Compression was found to shorten the apical, but not basal, dendrites of underlying layer III and V cortical pyramidal neurons and reduced dendritic spines on the entire dendritic arbor immediately. Dendrogram analysis showed that in addition to distal, proximal apical dendrites also quickly reconfigured. We then focused on apical dendritic trunks and explored how proximal dendrites were rapidly altered. Compression instantly twisted the microtubules and deformed the membrane contour of dendritic trunks likely a result of the elastic nature of dendrites as immediate decompression restored it and stabilization of microtubules failed to block it. Subsequent adaptive remodeling restored plasmalemma and microtubules to normal appearance in 3 days likely via active mechanisms as taxol blocked the restoration of microtubules and in addition partly affected plasmalemmal reorganization which presumably engaged recycling of excess membrane. In short, the structural dynamics and the associated mechanisms that we revealed demonstrate how compression quickly altered the morphology of cortical output neurons and hence cortical functions consequently.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Neuroscience - Volume 167, Issue 2, 5 May 2010, Pages 414-427
Journal: Neuroscience - Volume 167, Issue 2, 5 May 2010, Pages 414-427
نویسندگان
J.-R. Chen, T.-J. Wang, Y.-J. Wang, G.-F. Tseng,