Abstract:
:There are many evidences suggest that ascorbate in the extracellular space can affect glutamate concentration in the rat's brain. In this report, we studied how ascorbate in microdialysis perfusion medium affected glutamate level at the striatum in freely-moving rats. Three perfusion mediums were used: 0, 250, and 400 microM of ascorbate in perfusion medium. The extracellular basal concentrations of glutamate were determined to be 1.29+/-0.52 microM for the no ascorbate group, 0.86+/-0.35 microM for the low ascorbate group and 4.76+/-1.48 microM for the high ascorbate group. By using 400 microM of ascorbate in a perfusion medium, we found that the extracellular basal concentration of glutamate significantly increased and its in vivo recovery significantly decreased. This indicated that ascorbate concentration in a perfusion medium was important and must be carefully considered while using microdialysis technique to monitor glutamate concentration in vivo.
journal_name
Neurosci Lettjournal_title
Neuroscience lettersauthors
Lai YJ,Shen EY,Pan WHdoi
10.1016/s0304-3940(99)00966-0keywords:
subject
Has Abstractpub_date
2000-02-04 00:00:00pages
145-8issue
3eissn
0304-3940issn
1872-7972pii
S0304394099009660journal_volume
279pub_type
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