Cell Reports
Volume 30, Issue 12, 24 March 2020, Pages 4303-4316.e6
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Conditional Single Vector CRISPR/SaCas9 Viruses for Efficient Mutagenesis in the Adult Mouse Nervous System

https://doi.org/10.1016/j.celrep.2020.02.092Get rights and content
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Highlights

  • Single viral vector CRISPR/SaCas9 for efficient in vivo mutagenesis

  • Cre- and Flp-dependent cell type-specific gene mutagenesis

  • Combinatorial strategies for elucidating circuit-specific gene function

Summary

Mice engineered for conditional, cell type-specific gene inactivation have dominated the field of mouse genetics because of the high efficiency of Cre-loxP-mediated recombination. Recent advances in CRISPR/Cas9 technologies have provided alternatives for rapid gene mutagenesis for loss-of-function (LOF) analysis. Whether these strategies can be streamlined for rapid genetic analysis with the efficiencies comparable with those of conventional genetic approaches has yet to be established. We show that a single adeno-associated viral (AAV) vector containing a recombinase-dependent Staphylococcus aureus Cas9 (SaCas9) and a single guide RNA (sgRNA) are as efficient as conventional conditional gene knockout and can be adapted for use in either Cre- or Flp-driver mouse lines. The efficacy of this approach is demonstrated for the analysis of GABAergic, glutamatergic, and monoaminergic neurotransmission. Using this strategy, we reveal insight into the role of GABAergic regulation of midbrain GABA-producing neurons in psychomotor activation.

Keywords

CRISPR
SaCas9
VTA
dopamine
GABA
glutamate
AAV

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