Non-cell autonomous influence of MeCP2-deficient glia on neuronal dendritic morphology.

Non-cell autonomous influence of MeCP2-deficient glia on neuronal dendritic morphology.
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DOI:
10.1038/nn.2275
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发表时间:
2009-03
影响因子:
25
通讯作者:
Mandel, Gail
Mandel, Gail
中科院分区:
医学1区
文献类型:
--
作者:
Ballas, Nurit;Lioy, Daniel T.;Grunseich, Christopher;Mandel, Gail

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神经发育障碍Rett综合征(RTT)是由转录因子甲基-CpG结合蛋白2(MeCP 2)的零星突变引起的。虽然认为RTT的主要原因是由于神经元中缺乏功能性MeCP 2而导致的细胞自主性,但非细胞自主性因素是否有助于该疾病尚不清楚。在这里,我们表明,损失的MeCP 2不仅发生在神经元,但也在RTT脑胶质细胞。使用体外共培养系统,我们发现,从RTT小鼠模型的突变型星形胶质细胞,和他们的条件培养基,不能支持正常的树突状形态的野生型或突变型海马神经元。我们的研究表明,在RTT脑中,携带MeCP 2突变的星形胶质细胞对神经元特性具有非细胞自主效应,可能是由于可溶性因子的异常分泌。
The neurodevelopmental disorder Rett Syndrome (RTT) is caused by sporadic mutations in the transcriptional factor methyl-CpG binding protein 2 (MeCP2). Although it is thought that the primary cause of RTT is cell autonomous due to lack of functional MeCP2 in neurons, whether non-cell autonomous factors contribute to the disease, is unknown. Here, we show that loss of MeCP2 occurs not only in neurons but also in glial cells of RTT brain. Using an in vitro co-culture system, we find that mutant astrocytes from a RTT mouse model, and their conditioned medium, fail to support normal dendritic morphology of either wild-type or mutant hippocampal neurons. Our studies suggest that in RTT brain, astrocytes carrying MeCP2 mutations have a non-cell autonomous effect on neuronal properties, likely due to aberrant secretion of soluble factor(s).
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