On the role of bicarbonate as a hydrogen ion buffer in rat CNS neurones.

Abstract:

:The role of bicarbonate as a hydrogen ion buffer has been investigated using the fluorescent dye BCECF in individual rat cerebellar, hippocampal and neocortical neurones maintained in culture. The steady-state intracellular pH (pHi) was estimated to be 7.07 +/- 0.05 (n = 22) in CO2-HCO3(-)-buffered media. Buffering power (beta) estimated from the addition and removal of weak bases was ca 10 mM (pH unit)-1 and was found to be similar in both CO2-HCO3(-)- and Hepes-buffered media. The membrane-permeant carbonic anhydrase inhibitor, acetazolamide (10-20 microM), did not affect estimates of beta. The results indicate that CO2-HCO3- does not act as an open buffer system in these neurones.

journal_name

Exp Physiol

journal_title

Experimental physiology

authors

Amos BJ,Pocock G,Richards CD

doi

10.1113/expphysiol.1996.sp003963

subject

Has Abstract

pub_date

1996-07-01 00:00:00

pages

623-32

issue

4

eissn

0958-0670

issn

1469-445X

journal_volume

81

pub_type

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