High-throughput genetic screen for synaptogenic factors: identification of LRP6 as critical for excitatory synapse development.

High-throughput genetic screen for synaptogenic factors: identification of LRP6 as critical for excitatory synapse development.
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DOI:
10.1016/j.celrep.2013.11.008
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发表时间:
2013-12-12
期刊:
影响因子:
8.8
通讯作者:
Huganir RL
Huganir RL
中科院分区:
生物学1区
文献类型:
--
作者:
Sharma K;Choi SY;Zhang Y;Nieland TJ;Long S;Li M;Huganir RL

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无脊椎动物的基因筛查已经发现了许多突触基因和突触途径。然而,在哺乳动物身上进行类似的基因研究是不可能的。我们优化了一个自动化的高通量平台,该平台采用了自动化的液体处理和原始哺乳动物神经元的成像。利用这个平台,我们已经筛选了3200个针对800个蛋白质的shRNA。LRP6是发现的其中一个靶点,它是典型的Wnt配体的共同受体。LRP6调节兴奋性突触发生,并选择性地定位于兴奋性突触。在体内,LRP6的敲除会导致功能性突触数量的减少。此外,我们还证明了规范的Wnt配体Wnt8A通过LRP6促进突触发生。这些结果为使用高含量方法筛选哺乳动物神经系统中的突触生成因子,以及鉴定和表征对体内功能突触的发育至关重要的Wnt配体受体复合体提供了原理证据。
Genetic screens in invertebrates have discovered many synaptogenic genes and pathways. However, similar genetic studies have not been possible in mammals. We have optimized an automated high-throughput platform that employs automated liquid handling and imaging of primary mammalian neurons. Using this platform we have screened 3200 shRNAs targeting 800 proteins. One of the hits identified was LRP6, a co-receptor for canonical Wnt ligands. LRP6 regulates excitatory synaptogenesis, and is selectively localized to excitatory synapses. In vivo knockdown of LRP6 leads to a reduction in the number of functional synapses. Moreover, we show that the canonical Wnt ligand, Wnt8A, promotes synaptogenesis via LRP6. These results provide a proof of principle for using a high content approach to screen for synaptogenic factors in the mammalian nervous system, and identify and characterize a Wnt ligand receptor complex that is critical for development of functional synapses in vivo.
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