Rabies virus-based labeling of layer 6 corticothalamic neurons for two-photon imaging in vivo.

ABSTRACT: Neocortical layer 6 (L6) is less understood than other more superficial layers, largely owing to limitations of performing high-resolution investigations in vivo. Here, we show that labeling with the Challenge Virus Standard (CVS) rabies virus strain enables high-quality imaging of L6 neurons by conventional two-photon microscopes. CVS virus injection into the medial geniculate body can selectively label L6 neurons in the auditory cortex. Only three days after injection, dendrites and cell bodies of L6 neurons could be imaged across all cortical layers. Ca²⁺ imaging in awake mice showed that sound stimulation evokes neuronal responses from cell bodies with minimal contamination from neuropil signals. In addition, dendritic Ca²⁺ imaging revealed significant resp

SUBMITTER: Gu M 

PROVIDER: S-EPMC10214394 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature