title

سلولهای بنیادی عصبی در گروههای مجزایی در مغز پستانداران بالغ واقع شده اند

گل محمدی, محمد قاسم ، بلکمور, دانیل ، ریتز, رادنی لی (1385) سلولهای بنیادی عصبی در گروههای مجزایی در مغز پستانداران بالغ واقع شده اند. در: Australian Neuroscience Society-26th Annual meeting, 31 ژانویه تا 3 فوریه, استرالیا-سیدنی.

[img]
پیش نمایش
متنی - نسخه چاپ شده
439kB

عنوان انگليسي

Neural Stem Cells Reside in distinct pocket in the adult mammalian brain

خلاصه انگلیسی

It is now clear that new neurons continue to be generated in the adult mammalian brain, and that endogenous neural stem cells (NSCs) provide the basis for replacing those neurons lost due to normal processes, such as ageing, or in response to pathological insults, such as spinal cord injury or stroke. Owing to the absence of a positive marker distinguishing NSCs from other precursor populations, we know little about the activity of endogenous stem cells, and even less about their regulation. A defining characteristic that distinguishes endogenous NSCs from more committed progenitors is their relatively quiescent nature. Here we sought to identify infrequently cycling endogenous NSCs by "pulsing" dividing cells with BrdU for a period of 1 month. This was followed by "chasing" these cells for a period of three months post-injection, over which rapidly cycling cells will have diluted their label leaving only slow cycling or label retaining cells (LRCs). An analysis of the distribution of LRCs along the adult mouse ventricular neuraxis was accomplished by serially sectioning (14 µm) the entire brain (n=5 mice), and counting the number of BrdU-immunoreactive cells that did not colocalize with markers of mature cell types (NeuN, GFAP, S-100, O4). This analysis revealed three distinct regions where high concentrations of LRCs correlated exactly with peaks in the number of neurosphere-forming cells that could be harvested. However, as neurosphere formation is indicative of both stem and progenitor cells, we are currently employing the neural-colony forming cell assay, which can be distinguish stem from progenitor cells based on colony size, to determine what percentage of LRCs are indeed NSCs.

نوع سند :موضوع کنفرانس یا کارگاه (پوستر )
زبان سند : انگلیسی
نویسنده مسئول :محمد قاسم گل محمدی
اطلاعات اضافی :شماره پوستر : 013
کلید واژه ها (انگلیسی):Neural stem cells-brain mouse
موضوعات :WL سیستم عصبی
QS آناتومی انسان
بخش های دانشگاهی :دانشكده پزشكي > گروه علوم پایه > بخش علوم تشريح
کد شناسایی :1481
ارائه شده توسط : دکتر محمدقاسم گلمحمدی
ارائه شده در تاریخ :30 تیر 1389 23:30
آخرین تغییر :07 مهر 1393 06:23

فقط پرسنل کتابخانه صفحه کنترل اسناد

Document Downloads

More statistics for this item...