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Preparation of Rat Oligodendrocyte Progenitor Cultures and Quantification of Oligodendrogenesis Using Dual-infrared Fluorescence Scanning
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The adhesion G protein-coupled receptor GPR56 is a cell-autonomous regulator of oligodendrocyte development

Stefanie Giera1, Yiyu Deng1, Rong Luo1

  • 1Division of Newborn Medicine, Department of Medicine, Boston Children's Hospital and Harvard Medical School, Boston, Massachusetts 02115, USA.

Nature Communications
|January 22, 2015
PubMed

Insights

GPR56 protein is crucial for oligodendrocyte development and central nervous system myelination. Loss of GPR56 impairs oligodendrocyte precursor cell proliferation, leading to hypomyelination in mice.

Area of Science:

  • Neuroscience
  • Cell Biology
  • Developmental Biology

Background:

  • Mutations in G protein-coupled receptor 56 (GPR56) cause bilateral frontoparietal polymicrogyria (BFPP), a human brain malformation.
  • BFPP is associated with myelination defects, but GPR56's role in oligodendrocyte development is unclear.

Purpose of the Study:

  • To investigate the cellular function of GPR56 in oligodendrocyte development and central nervous system (CNS) myelination.

Main Methods:

  • Generated Gpr56-knockout mice to study its role in oligodendrocyte development.
  • Analyzed oligodendrocyte precursor cell (OPC) proliferation and differentiation.
  • Assessed myelination status in the corpus callosum and optic nerves using Gpr56-knockout models.
  • Utilized conditional knockout models to ablate Gpr56 specifically in OPCs.

Main Results:

  • Loss of Gpr56 resulted in hypomyelination of the CNS in mice.
  • GPR56 is downregulated in mature myelinating oligodendrocytes.
  • Gpr56-knockout mice showed reduced OPC proliferation and diminished active RhoA levels.
  • Fewer mature oligodendrocytes and myelinated axons were observed in Gpr56-knockout mice.
  • Conditional ablation of Gpr56 in OPCs recapitulated the hypomyelination phenotype.

Conclusions:

  • GPR56 acts as a cell-autonomous regulator of oligodendrocyte development.
  • GPR56 is essential for proper oligodendrocyte differentiation and CNS myelination.

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