Improved Monosynaptic Neural Circuit Tracing Using Engineered Rabies Virus Glycoproteins.
Improved Monosynaptic Neural Circuit Tracing Using Engineered Rabies Virus Glycoproteins.
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DOI:
10.1016/j.celrep.2016.03.067
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发表时间:
2016-04-26
期刊:
影响因子:
8.8
通讯作者:
Callaway EM
中科院分区:
文献类型:
--
作者:
Kim EJ;Jacobs MW;Ito-Cole T;Callaway EM
Monosynaptic rabies virus tracing is a unique and powerful tool to identify neurons making direct presynaptic connections onto neurons of interest across the entire nervous system. Current methods utilize complementation of glycoprotein gene-deleted rabies of the SAD B19 strain with its glycoprotein, B19G, to mediate retrograde trans-synaptic spread across a single synaptic step. In most conditions this method labels only a fraction of input neurons and would thus benefit from improved efficiency of trans-synaptic spread. Here we report newly engineered glycoprotein variants to improve trans-synaptic efficiency. Among them, oG (optimized Glycoprotein) is a codon-optimized version of a chimeric glycoprotein consisting of the transmembrane/cytoplasmic domain of B19G and the extracellular domain of rabies Pasteur virus strain glycoprotein. We demonstrate that oG increases the tracing efficiency for long-distance input neurons up to 20-fold compared to B19G. oG-mediated rabies tracing will therefore allow identification and study of more complete monosynaptic input neural networks.
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