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Papers of the Week

Papers: 16 Jan 2021 - 22 Jan 2021

Animal Studies

2021 Jan

Nat Neurosci



Diversification of molecularly defined myenteric neuron classes revealed by single-cell RNA sequencing.


Morarach K, Mikhailova A, Knoflach V, Memic F, Kumar R, Li W, Ernfors P, Marklund U
Nat Neurosci. 2021 Jan; 24(1):34-46.
PMID: 33288908.


Autonomous regulation of the intestine requires the combined activity of functionally distinct neurons of the enteric nervous system (ENS). However, the variety of enteric neuron types and how they emerge during development remain largely unknown. Here, we define a molecular taxonomy of 12 enteric neuron classes within the myenteric plexus of the mouse small intestine using single-cell RNA sequencing. We present cell-cell communication features and histochemical markers for motor neurons, sensory neurons and interneurons, together with transgenic tools for class-specific targeting. Transcriptome analysis of the embryonic ENS uncovers a novel principle of neuronal diversification, where two neuron classes arise through a binary neurogenic branching and all other identities emerge through subsequent postmitotic differentiation. We identify generic and class-specific transcriptional regulators and functionally connect Pbx3 to a postmitotic fate transition. Our results offer a conceptual and molecular resource for dissecting ENS circuits and predicting key regulators for directed differentiation of distinct enteric neuron classes.