Journal
NUTRITIONAL NEUROSCIENCE
Volume 16, Issue 2, Pages 78-82Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1179/1476830512Y.0000000033
Keywords
L-Theanine; Glutamate; GABA; Limbic seizures; Generalized seizures
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Funding
- Brussels Capital Region (Innoviris-Prospective Research for Brussels)
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L-Theanine, an ethylamide derivate of glutamate found in abundance in green tea, has been shown to exert beneficial actions in animal models for several neurological disorders. We here investigated for the first time the effect of L-theanine intake on seizure susceptibility using acute pilocarpine and pentylenetetrazol (PTZ) mouse models for studying, respectively, limbic seizures or primarily generalized seizures. Moreover, we studied the effect of L-theanine intake on extracellular hippocampal and cortical glutamate and gamma-aminobutyric acid (GABA) levels, using in vivo microdialysis. Feeding mice with a 4% L-theanine solution significantly decreased their susceptibility to pilocarpine-induced seizures whereas susceptibility to PTZ-induced seizures was increased. The latter effect was linked to decreased extracellular GABA concentrations in frontal cortex.
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