Identification of an Early Subset of Cerebellar Nuclei Neurons in Mice

Overview

Journal Elife

Specialty Biology

Date 2024 Dec 16

PMID 39679919

Authors

Maryam Rahimi-Balaei

Shayan Amiri

Thomas Lamonerie

Sih-Rong Wu

Huda Y Zoghbi

G Giacomo Consalez

Daniel Goldowitz

Hassan Marzban

Affiliations

Soon will be listed here.

Abstract

Cerebellar nuclei (CN) neurons serve as the primary output of the cerebellum and originate from the cerebellar primordium at early stages of cerebellar development. These neurons are diverse, integrating information from the cerebellar cortex and relaying it to various brain regions. Employing various methodologies, we have characterized a specific subset of CN neurons that do not originate from the rhombic lip or ventricular zone of the cerebellar primordium. Embryos were collected at early stages of development and processed for immunohistochemistry (IHC), western blotting, in situ hybridization (ISH), embryonic culture, DiI labeling, and flow cytometry analysis (FCM). Our findings indicate that a subset of CN neurons expressing α-synuclein (SNCA), OTX2, MEIS2, and p75NTR (NGFR) are located in the rostroventral region of the NTZ. While CN neurons derived from the rhombic lip are positioned in the caudodorsal area of the NTZ in the cerebellar primordium. Utilizing Otx2-GFP and mice, we have determined that these cells do not originate from the germinal zone of the cerebellar primordium. These results suggest the existence of a novel extrinsic germinal zone for the cerebellar primordium, possibly the mesencephalon, from which early CN neurons originate.

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