Transcriptomics

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Molecular classification of zebrafish retinal ganglion cells links genes to behavior


ABSTRACT: Retinal ganglion cells (RGCs) form an array of feature detectors, which transmit visual information through segregated channels to central brain regions. Characterizing RGC diversity is required to understand the logic of this functional parcellation. Using single- cell transcriptomics, we systematically classified RGCs in adult and larval zebrafish, thereby identifying marker genes for >30 stable and several transient cell types, cell type-specific markers, and their maturational changes. We used this catalog to engineer transgenic driverreporter lines, enabling experimental genetic access to specific RGC types. Strikingly, expression of a few transcription factors often predicts dendrite morphological features, in particular and axonal projections to specific tectal layers and extratectal targets. Moreover, iIn vivo calcium imaging revealed that molecularly defined RGCs exhibit highly specific functional tuningphysiological properties. Finally, chemogenetic ablation of eomesa+ RGCs, which comprise three melanopsin-expressing types with a specific projections to thalamus, pretectum and one deep tectal layerpattern, selectively impaired a visual behavior, phototaxis. Our study establishes a framework and provides a resource for systematically studying the functional architecture of the visual system.

ORGANISM(S): Danio rerio

PROVIDER: GSE152842 | GEO | 2020/11/30

REPOSITORIES: GEO

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