Aug 7, 2018

Knock-in rats expressing Cre and Flp recombinases at the Parvalbumin locus.

BioRxiv : the Preprint Server for Biology
Jai Y YuJoshua Berke

Abstract

Rats have the ability to learn and perform sophisticated behavioral tasks, making them very useful for investigating neural circuit functions. In contrast to the extensive mouse genetic toolkit, the paucity of recombinase-expressing rat models has limited the ability to monitor and manipulate molecularly-defined neural populations in this species. Here we report the generation and validation of two knock-in rat strains expressing either Cre or Flp recombinase under the control of Parvalbumin (Pvalb), a gene expressed in the critical 'fast-spiking' subset of inhibitory interneurons (FSIs). These strains were generated with CRISPR-Cas9 gene editing and show highly specific and penetrant labeling of Pvalb-expressing neurons, as demonstrated by in situ hybridization and immunohistochemistry. We validated these models in both prefrontal cortex and striatum using both ex vivo and in vivo approaches, including whole-cell recording, optogenetics, extracellular physiology and photometry. Our results demonstrate the utility of these new transgenic models for a wide range of neuroscience experiments.

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Mentioned in this Paper

In Vivo
Pvalb
Immunohistochemistry
Prefrontal Cortex
Neostriatum
Extracellular
Gene Editing
Neurons
Recombinase
Plants, Transgenic

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