RRC ID 57219
Author Li H, Horns F, Wu B, Xie Q, Li J, Li T, Luginbuhl DJ, Quake SR, Luo L.
Title Classifying Drosophila Olfactory Projection Neuron Subtypes by Single-Cell RNA Sequencing.
Journal Cell
Abstract The definition of neuronal type and how it relates to the transcriptome are open questions. Drosophila olfactory projection neurons (PNs) are among the best-characterized neuronal types: different PN classes target dendrites to distinct olfactory glomeruli, while PNs of the same class exhibit indistinguishable anatomical and physiological properties. Using single-cell RNA sequencing, we comprehensively characterized the transcriptomes of most PN classes and unequivocally mapped transcriptomes to specific olfactory function for six classes. Transcriptomes of closely related PN classes exhibit the largest differences during circuit assembly but become indistinguishable in adults, suggesting that neuronal subtype diversity peaks during development. Transcription factors and cell-surface molecules are the most differentially expressed genes between classes and are highly informative in encoding cell identity, enabling us to identify a new lineage-specific transcription factor that instructs PN dendrite targeting. These findings establish that neuronal transcriptomic identity corresponds with anatomical and physiological identity defined by connectivity and function.
Volume 171(5)
Pages 1206-1220.e22
Published 2017-11-16
DOI 10.1016/j.cell.2017.10.019
PII S0092-8674(17)31241-2
PMID 29149607
PMC PMC6095479
MeSH Animals Brain / cytology Brain / metabolism Cluster Analysis Dendrites / metabolism Drosophila melanogaster / cytology Drosophila melanogaster / growth & development Drosophila melanogaster / metabolism* Gene Expression Profiling Neurons / metabolism* Olfactory Bulb / cytology Olfactory Bulb / metabolism Organ Specificity Pupa / cytology Pupa / metabolism Sequence Analysis, RNA / methods* Single-Cell Analysis / methods* Transcription Factors / metabolism
IF 36.216