Functional genomic analyses identify pathways dysregulated by progranulin deficiency, implicating Wnt signaling.
Functional genomic analyses identify pathways dysregulated by progranulin deficiency, implicating Wnt signaling.
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DOI:
10.1016/j.neuron.2011.07.021
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发表时间:
2011-09-22
期刊:
影响因子:
16.2
通讯作者:
Geschwind DH
中科院分区:
文献类型:
--
作者:
Rosen EY;Wexler EM;Versano R;Coppola G;Gao F;Winden KD;Oldham MC;Martens LH;Zhou P;Farese RV Jr;Geschwind DH
Progranulin (GRN) mutations cause frontotemporal dementia (FTD), but GRN’s function in the CNS remains largely unknown. To identify the pathways downstream of GRN, we used weighted gene co-expression network analysis (WGCNA) to develop a systems-level view of transcriptional alterations in a human neural progenitor model of GRN-deficiency. This highlighted key pathways such as apoptosis and ubiquitination in GRN deficient human neurons, while revealing an unexpected major role for the Wnt signaling pathway, which was confirmed by analysis of gene expression data from postmortem FTD brain. Furthermore, we observed that the Wnt receptor Fzd2 was one of only a few genes up-regulated at 6 weeks in a GRN knockout mouse, and that FZD2 reduction caused increased apoptosis, while its upregulation promoted neuronal survival in vitro. Together, these in vitro and in vivo data point to an adaptive role for altered Wnt signaling in GRN deficiency-mediated FTD, representing a potential therapeutic target.
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