An approach to comprehensive genome and proteome expression analyses in Schwann cells and neurons during peripheral nerve myelin formation.

Kangas, Salla M.; Ohlmeier, Steffen; Sormunen, Raija; Jouhilahti, Eeva‐Mari; Peltonen, Sirkku; Peltonen, Juha; Heape, Anthony M.

Peripheral nerve myelination is a complex event resulting from spatially and temporally regulated reciprocal interactions between the neuron and myelin-forming Schwann cells. The dynamic process and the protein functional modules and networks that operate throughout the myelination process are poorly understood because of a lack of methodologies suitable for observing specific changes in the Schwann cell/neuron-unit. The identification of the precise roles for the proteins participating in the functional modules and networks that participate in the myelination process is hindered by the cellular and molecular complexity of the nervous tissue itself. We have developed an approach based on a myelinating dorsal root ganglion explant model that allows distinguishing clear, reproducible and predictable differences between the biochemical properties and the genomic and proteomic expression profiles of both cellular components of the Schwann cell/neuron unit at different stages of the myelination process. This model, derived from E13.5 C57 BL/6J mouse embryos, is sufficiently robust for use in identifying the protein functional networks and modules related to peripheral nerve myelin formation. The genomic expression profiles of the selected neuronal, Schwann cell and myelin-specific proteins in the cultures reflect in vivo profiles reported in the literature, and the structural and ultrastructural properties of the myelin, as well as the myelination schedule of the cultures, closely resemble those observed in peripheral nerves in situ. The RNA expression data set is available through NCBI gene expression omnibus accession GSE60345.

GENOMES; PROTEOMICS; SCHWANN cells; PERIPHERAL nervous system; NEURONS

Journal of Neurochemistry, 2016, Vol 138, Issue 6, p830

0022-3042

Academic Journal

10.1111/jnc.13722