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Swelling of primary astrocyte cultures by exposing them to hypotonic media caused release of label after the cells had been allowed to accumulate 3H-L-glutamate, 3H-D-aspartate, or 3H-taurine. Comparable release of endogenous L-glutamate or taurine, as measured by high-pressure liquid chromatography (HPLC), was also found. Release of label was not affected(More)
In this study we have found that L-glutamic acid, as well as being taken up by a Na+-dependent mechanism, will stimulate the uptake of 22Na+ by primary astrocyte cultures from rat brain in the presence of ouabain. By simultaneously measuring the uptake of 22Na+ and L-3H-glutamate a stoichiometry of 2-3 Na+ per glutamate was measured, implying electrogenic(More)
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