The first two authors contributed equally to this work.
Fyn kinase is involved in oligodendroglial cell differentiation induced by apotransferrin
Article first published online: 29 DEC 2008
Copyright © 2008 Wiley-Liss, Inc.
Journal of Neuroscience Research
Special Issue: Oligodendrocyte Development, Myelination and Related Diseases
Volume 87, Issue 15, pages 3378–3389, 15 November 2009
How to Cite
Perez, M.J., Ortiz, E.H., Roffé, M., Soto, E.F. and Pasquini, J.M. (2009), Fyn kinase is involved in oligodendroglial cell differentiation induced by apotransferrin. J. Neurosci. Res., 87: 3378–3389. doi: 10.1002/jnr.21962
- Issue published online: 5 OCT 2009
- Article first published online: 29 DEC 2008
- Manuscript Accepted: 13 OCT 2008
- Manuscript Revised: 29 SEP 2008
- Manuscript Received: 30 JUN 2008
- ANPCYT, Argentina. Grant Number: 12282
- oligodendrocyte differentiation;
Mechanisms that regulate oligodendroglial cell (OLGc) differentiation are the focus of intensive research in the field of cellular and molecular neurobiology. We have previously shown that the addition of apotransferrin (aTf) to primary OLGc cultures accelerates their differentiation and induces an increase in the expression of different components of the myelin cytoskeleton (CSK) such as actin, tubulin, and some of the microtubule-associated proteins, particularly the stable tubulin only peptide (STOP). Fyn protein-tyrosine kinase (Fyn kinase), a member of the Src family, participates in signalling pathways that regulate OLGs/myelin cytoskeletal reorganization. It is essential for myelin development in the central nervous system (CNS), and its absence results in hypomyelination. In the present study, we used both primary cell and N19 cell line cultures to investigate further the mechanisms of action involved in the accelerated differentiation of OLGcs induced by aTf. In particular, we were interested in studying the participation of Fyn kinase in the different pathways involved in the reorganization of the OLGc/myelin cytoskeleton. In agreement with results already published, we found that in OLGcs, Fyn kinase is associated with Tau and tubulin. Using a dominant-negative of Tau in which the Fyn-Tau-microtubules (MTs) interaction is blocked, we found that aTf was unable to induce OLGc morphological differentiation. It was also observed that aTf decreases the activated RhoA content in coincidence with a redistribution of actin immunoreactivity. These results give support to our hypothesis that Fyn kinase plays a key role in the differentiation process of OLGcs promoted by aTf. © 2008 Wiley-Liss, Inc.