A Discrete Subtype of Neural Progenitor Crucial for Cortical Folding in the Gyrencephalic Mammalian Brain

Overview

Journal Elife

Specialty Biology

Date 2020 Apr 22

PMID 32312384

Citations 26

Authors

Naoyuki Matsumoto

Satoshi Tanaka

Toshihide Horiike

Yohei Shinmyo

Hiroshi Kawasaki

Affiliations

Soon will be listed here.

Abstract

An increase in the diversity of neural progenitor subtypes and folding of the cerebral cortex are characteristic features which appeared during the evolution of the mammalian brain. Here, we show that the expansion of a specific subtype of neural progenitor is crucial for cortical folding. We found that outer radial glial (oRG) cells can be subdivided by HOPX expression in the gyrencephalic cerebral cortex of ferrets. Compared with HOPX-negative oRG cells, HOPX-positive oRG cells had high self-renewal activity and were accumulated in prospective gyral regions. Using our in vivo genetic manipulation technique for ferrets, we found that the number of HOPX-positive oRG cells and their self-renewal activity were regulated by sonic hedgehog (Shh) signaling. Importantly, suppressing Shh signaling reduced HOPX-positive oRG cells and cortical folding, while enhancing it had opposing effects. Our results reveal a novel subtype of neural progenitor important for cortical folding in gyrencephalic mammalian cerebral cortex.

Citing Articles

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