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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/7961

Title: Morphological changes do not reflect differentiation stage in OLN-(93) oligodendrocytes
Authors: BUCKINX, Roeland
SMOLDERS, Inge
SAHEBALI, Sheen
SMETS, Ilse
VAN DE VEN, Martin
AMELOOT, Marcel
RIGO, Jean-Michel
Issue Date: 2007
Publisher: CAMBRIDGE UNIV PRESS
Citation: NEURON GLIA BIOLOGY, 2. p. S48-S48
Abstract: OLN-93 cells, a cell line established from spontaneously transformed rat brain glial cultures, are used as a model for oligodendrocytes. These cells are known to undergo morphological changes upon serum deprivation. The objective of the present study is to investigate a possible correlation between these morphological changes and (1) the loss or gain of oligodendrocyte markers and (2) the electrophysiological properties of these cells. Using RT-PCR and immunocytochemistry, we demonstrate that the OLN-93 cell line expresses a broad range of markers (NG2, CNP, MAG, MOG) both when cultured in medium containing 10% or 0.5% fetal calf serum. Whole-cell patch-clamp recordings demonstrate that, regardless of the culture conditions, OLN-93 cells mainly express delayed-rectifying K+ currents, a characteristic of immature oligodendrocytes. These currents are in part mediated by the shaker family of voltage-gated potassium channels. Kv1.1 and Kv1.3-expression are present at the mRNA and at the protein levels, and functional evidence for Kv1.3 mediated currents was obtained by using the selective blocker margatoxin. Under low serum conditions, OLN-93 cells exhibit differentiation-like morphological changes. However, we provide evidence that these morphological modifications do not necessarily correlate with biochemical or functional changes. Based on these data, we conclude that the OLN-93 cell line can be situated at a developmental stage between a late pre-oligodendrocyte, regardless of serum concentration.
Notes: Hasselt Univ, B-3590 Dipenbeck, Belgium.
URI: http://hdl.handle.net/1942/7961
ISI #: 000251708800144
ISSN: 1740-925X
Category: M
Type: Journal Contribution
Appears in Collections: Research publications

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