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Expression of rab GTP‐binding proteins during oligodendrocyte differentiation in culture
Author(s) -
Bouverat B.P.,
Krueger W.H.,
Coetzee T.,
Bansal R.,
Pfeiffer S.E.
Publication year - 2000
Publication title -
journal of neuroscience research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.72
H-Index - 160
eISSN - 1097-4547
pISSN - 0360-4012
DOI - 10.1002/(sici)1097-4547(20000201)59:3<446::aid-jnr20>3.0.co;2-l
Subject(s) - rab , myelin , gtpase , context (archaeology) , microbiology and biotechnology , biology , oligodendrocyte , galactocerebroside , neuroscience , central nervous system , paleontology
Oligodendrocytes (OLs) synthesize and transport vast amounts of proteins and lipids from the cell body to the morphologically and biochemically distinct domains of the myelin membrane. From our prediction that regulators of vesicular transport should be up‐regulated at the time of myelin production, we hypothesized that the up‐regulated and unidentified small GTPases found by Huber et al. [1994a] may be Rab proteins. We have analyzed the mRNA expression of rabs in OLs, and have detected rabs 10, 11b, 18, 24, 26, and 28 in addition to rabs that were found previously. Our data show that among the Rabs so far detected during differentiation, only Rabs 5a and 8a exhibited up‐regulation in addition to the previously published Rab3a (Madison et al. [1999], J. Neurochem. 72:988–998). We discuss the limited extent of up‐regulation of rabs in the context of the presumed necessity for an increase in Rab activity during myelin assembly. J. Neurosci. Res. 59:446–453, 2000 © 2000 Wiley‐Liss, Inc.