کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2077987 1079760 2009 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
High Levels of Id1 Expression Define B1 Type Adult Neural Stem Cells
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی بیوتکنولوژی یا زیست‌فناوری
پیش نمایش صفحه اول مقاله
High Levels of Id1 Expression Define B1 Type Adult Neural Stem Cells
چکیده انگلیسی

SummaryDefining the molecular identity of stem cells may be critical for formulating a rational strategy for the therapeutic intervention of stem cell dysfunction. We find that high expression of Id1, a dominant-negative helix-loop-helix transcriptional regulator, identifies a rare population of GFAP+ astrocytes with stem cell attributes among the subventricular astrocytes in the adult brain. The rare, long-lived, and relatively quiescent Id1high astrocytes with morphology characteristic of B1 type astrocytes self-renew and generate migratory neuroblasts that differentiate into olfactory bulb interneurons. Cultured Id1high neural stem cells can self-renew asymmetrically and generate a stem and a differentiated cell expressing progressively lower levels of Id1, revealing an Id1 gradient in unperturbed cells of subventricular neurogenic lineages. Moreover, Id genes are necessary to confer self-renewal capacity, a characteristic of stem cell identity. We suggest that high expression of a single transcriptional regulator, Id1, molecularly defines the long-sought-after B1 type adult neural stem cells.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: - Volume 5, Issue 5, 6 November 2009, Pages 515–526
نویسندگان
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