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Molecular Fingerprinting Delineates Progenitor Populations in the Developing Zebrafish Enteric Nervous System

Overview
Journal Dev Dyn
Publisher Wiley
Date 2016 Aug 28
PMID 27565577
Citations 17
Authors
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Abstract

Background: To understand the basis of nervous system development, we must learn how multipotent progenitors generate diverse neuronal and glial lineages. We addressed this issue in the zebrafish enteric nervous system (ENS), a complex neuronal and glial network that regulates essential intestinal functions. Little is currently known about how ENS progenitor subpopulations generate enteric neuronal and glial diversity.

Results: We identified temporally and spatially dependent progenitor subpopulations based on coexpression of three genes essential for normal ENS development: phox2bb, sox10, and ret. Our data suggest that combinatorial expression of these genes delineates three major ENS progenitor subpopulations, (1) phox2bb + /ret- /sox10-, (2) phox2bb + /ret + /sox10-, and (3) phox2bb + /ret + /sox10+, that reflect temporal progression of progenitor maturation during migration. We also found that differentiating zebrafish neurons maintain phox2bb and ret expression, and lose sox10 expression.

Conclusions: Our data show that zebrafish enteric progenitors constitute a heterogeneous population at both early and late stages of ENS development and suggest that marker gene expression is indicative of a progenitor's fate. We propose that a progenitor's expression profile reveals its developmental state: "younger" wave front progenitors express all three genes, whereas more mature progenitors behind the wave front selectively lose sox10 and/or ret expression, which may indicate developmental restriction. Developmental Dynamics 245:1081-1096, 2016. © 2016 Wiley Periodicals, Inc.

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