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BAL modulates glutamate transport in synaptosomes and synaptic vesicles from rat brain.

The therapeutic use of BAL (2,3-dimercaptopropanol) as treatment for poisoning has been halted by data suggesting serious neurotoxicity. This article is a report on the effects of BAL and other dithiols, DMSA (meso-2,3-dimercaptosuccinic acid) and DMPS (2,3-dimercaptopropane-1-sulfonic acid), on [3H]glutamate release and uptake by rat brain synaptosomes and [3H]glutamate uptake by synaptic vesicles. BAL (100 microM) inhibited glutamate uptake (30%) and stimulated its basal release (30%) in synaptosomes, without affecting K+-stimulated release. BAL also inhibited glutamate uptake by synaptic vesicles (up to 60%). DMPS and DMSA (100 microM) had no significant effects on these parameters. The data reported here provide some evidence of glutamate involvement in BAL-induced neurotoxicity by demonstrating direct effects of BAL on glutamatergic system modulation.[1]

References

  1. BAL modulates glutamate transport in synaptosomes and synaptic vesicles from rat brain. Nogueira, C.W., Rotta, L.L., Tavares, R.G., Souza, D.O., Rocha, J.B. Neuroreport (2001) [Pubmed]
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