Axoglial Adhesion by Cadm4 Regulates CNS Myelination.

Neuron (2018-12-16)
Nimrod Elazar, Anya Vainshtein, Neev Golan, Bharath Vijayaragavan, Nicole Schaeren-Wiemers, Yael Eshed-Eisenbach, Elior Peles
ABSTRACT

The initiation of axoglial contact is considered a prerequisite for myelination, yet the role cell adhesion molecules (CAMs) play in mediating such interactions remains unclear. To examine the function of axoglial CAMs, we tested whether enhanced CAM-mediated adhesion between OLs and neurons could affect myelination. Here we show that increased expression of a membrane-bound extracellular domain of Cadm4 (Cadm4dCT) in cultured oligodendrocytes results in the production of numerous axoglial contact sites that fail to elongate and generate mature myelin. Transgenic mice expressing Cadm4dCT were hypomyelinated and exhibit multiple myelin abnormalities, including myelination of neuronal somata. These abnormalities depend on specific neuron-glial interaction as they were not observed when these OLs were cultured alone, on nanofibers, or on neurons isolated from mice lacking the axonal receptors of Cadm4. Our results demonstrate that tightly regulated axon-glia adhesion is essential for proper myelin targeting and subsequent membrane wrapping and lateral extension.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Deoxyribonuclease I from bovine pancreas, lyophilized powder, Protein ≥85 %, ≥400 Kunitz units/mg protein
Sigma-Aldrich
Bovine Serum Albumin, heat shock fraction, protease free, essentially globulin free, pH 7, ≥98%
Sigma-Aldrich
N-acetylcysteine amide, ≥98% (HPLC)
Sigma-Aldrich
Poly-L-lysine hydrobromide, mol wt 70,000-150,000 by viscosity
Sigma-Aldrich
Hydrocortisone-Water Soluble, BioReagent, suitable for cell culture
Sigma-Aldrich
D-Lysine, ≥98% (HPLC)
Sigma-Aldrich
Anti-OPALIN antibody produced in rabbit, Prestige Antibodies® Powered by Atlas Antibodies, affinity isolated antibody, buffered aqueous glycerol solution

Social Media

LinkedIn icon
Twitter icon
Facebook Icon
Instagram Icon

MilliporeSigma

Research. Development. Production.

We are a leading supplier to the global Life Science industry with solutions and services for research, biotechnology development and production, and pharmaceutical drug therapy development and production.

© 2021 Merck KGaA, Darmstadt, Germany and/or its affiliates. All Rights Reserved.

Reproduction of any materials from the site is strictly forbidden without permission.