Intracellular pH changes during oligodendrocyte differentiation in primary culture.

Abstract:

:We have studied the characteristics of pH(i) regulation at different stages of rat oligodendrocyte differentiation in primary culture. pH(i) was measured at 37 degrees C using the pH-sensitive fluorescent probe BCECF. In immature oligodendrocyte progenitor (OLP), three distinct ionic mechanisms were involved in pH(i) regulation: (i) a sodium-independent Cl(-)/HCO(-)(3) exchanger, (ii) a Na(+)/H(+) exchanger and (iii) a voltage-dependent Na(+)-HCO(-)(3) cotransporter. The two latter mechanisms were also detected in more differentiated pro-oligodendrocytes and in mature oligodendrocytes whereas the Cl(-)/HCO(-)(3) exchanger was not active in these two later stages of differentiation. The presence of this Cl(-)/HCO(-)(3) exchanger (that acts as a chronic acidifying mechanism) only in immature OLP maintains in these cells a steady-state pH(i) value significantly lower than values measured in more differentiated cells. The possible involvement of this pH(i) change in triggering cell differentiation is discussed.

journal_name

J Neurosci Res

authors

Boussouf A,Gaillard S

doi

10.1002/(SICI)1097-4547(20000315)59:6<731::AID-JNR

keywords:

subject

Has Abstract

pub_date

2000-03-15 00:00:00

pages

731-9

issue

6

eissn

0360-4012

issn

1097-4547

pii

10.1002/(SICI)1097-4547(20000315)59:6<731::AID-JNR

journal_volume

59

pub_type

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