Gap junctional communication and connexin expression in cultured olfactory ensheathing cells.

Abstract:

:The olfactory ensheathing cell (OEC) is a unique glial cell able to support neurite outgrowth in the CNS throughout life. The OEC has been described as having both Schwann cell-like and astrocyte-like characteristics. The purpose of this study was to compare gap junctional communication and connexin (Cx) expression in cultured olfactory ensheathing cells with both astrocytes and Schwann cells to establish which of these two cells types they most closely resemble. We examined the Cx mRNA profile of OECs, astrocytes, and Schwann cells using primers to Cx26, Cx32, Cx37, Cx43, Cx46, and Cx50. All connexins tested except Cx50 were expressed by all three cell types when initially cultured. However, we observed differences in the levels of expression of Cx32 and Cx26 between astrocytes, Schwann cells, and OECs that became pronounced with time. All three cell types show limited and variable gap junctional communication in culture as assessed by the transfer of microinjected Lucifer yellow. OECs had limited coupling compared with Schwann cells and astrocytes, although the extent of the dye spread through OECs was more comparable to that seen with Schwann cells than astrocytes. Thus, OECs display a profile of Cx expression that more closely resembles the Cx expression of Schwann cells rather than astrocytes.

journal_name

J Neurosci Res

authors

Barnett SC,Thompson RJ,Lakatos A,Pitts J

doi

10.1002/jnr.1182

keywords:

subject

Has Abstract

pub_date

2001-09-15 00:00:00

pages

520-8

issue

6

eissn

0360-4012

issn

1097-4547

pii

10.1002/jnr.1182

journal_volume

65

pub_type

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