Cerebellar nuclei evolved by repeatedly duplicating a conserved cell-type set

Justus M. Kebschul, Ethan B. Richman, N. Ringach, Drew Friedmann, Eddy Albarran, Sai Saroja Kolluru, Robert C. Jones, William E. Allen, Ying Wang, Seung Woo Cho, Huaijun Zhou, Jun B. Ding, Howard Y. Chang, Karl Deisseroth, Stephen R. Quake, Liqun Luo

Research output: Contribution to journalArticlepeer-review

Abstract

How have complex brains evolved from simple circuits? Here we investigated brain region evolution at cell-type resolution in the cerebellar nuclei, the output structures of the cerebellum. Using single-nucleus RNA sequencing in mice, chickens, and humans, as well as STARmap spatial transcriptomic analysis and whole-central nervous system projection tracing, we identified a conserved cell-type set containing two region-specific excitatory neuron classes and three region-invariant inhibitory neuron classes. This set constitutes an archetypal cerebellar nucleus that was repeatedly duplicated to form new regions. The excitatory cell class that preferentially funnels information to lateral frontal cortices in mice becomes predominant in the massively expanded human lateral nucleus. Our data suggest a model of brain region evolution by duplication and divergence of entire cell-type sets.

Original languageEnglish (US)
Article numbereabd5059
JournalScience
Volume370
Issue number6523
DOIs
StatePublished - Dec 18 2020
Externally publishedYes

ASJC Scopus subject areas

  • General

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