Abstract | PURPOSE: METHODS: Measurements were performed immediately before and after a titration period of 1 month (2 g/day during the past 2 weeks). A third measurement followed a maintenance period of 3 months (2 or 3 g/day). In 14 patients with drug-resistant temporal lobe epilepsy and 3 patients with occipital lobe epilepsy, GABA+/Cr was measured in the ipsilateral (i.e., epileptogenic) hemisphere and contralateral (i.e., nonepileptogenic) hemisphere in a volume of 8 cm3. RESULTS: Depending on the therapeutic efficacy of VGB, we defined three groups: (a) full responders (n = 7), (b) nonresponders (n = 7), and (c) partial responders (n = 3). The nonresponders had no significant change in the GABA+/Cr signal during the treatment compared with baseline. The full responders had a significant increase of the GABA+/Cr signal during the whole treatment phase and a lower ipsilateral level at baseline. The partial responders had also a lowered ipsilateral GABA+/Cr signal at baseline and an increase during treatment but a decrease when the seizures started again. CONCLUSIONS: Responders to VGB could be identified by a lower ipsilateral baseline GABA+/Cr signal and a steeper increase during VGB treatment. However, it was not possible to predict the duration of the response (full versus partial responder) with these criteria.
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Authors | S G Mueller, O M Weber, C O Duc, B Weber, D Meier, W Russ, P Boesiger, H G Wieser |
Journal | Epilepsia
(Epilepsia)
Vol. 42
Issue 1
Pg. 29-40
(Jan 2001)
ISSN: 0013-9580 [Print] United States |
PMID | 11207782
(Publication Type: Clinical Trial, Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- Anticonvulsants
- Phosphocreatine
- homocarnosine
- gamma-Aminobutyric Acid
- Carnosine
- Vigabatrin
- Creatine
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Topics |
- Adolescent
- Adult
- Anticonvulsants
(pharmacology, therapeutic use)
- Brain
(drug effects, metabolism, physiology)
- Brain Chemistry
(drug effects, physiology)
- Carnosine
(analogs & derivatives, analysis, chemistry)
- Creatine
(analysis, chemistry)
- Epilepsy
(diagnosis, drug therapy, metabolism)
- Epilepsy, Temporal Lobe
- Female
- Functional Laterality
- Humans
- Magnetic Resonance Spectroscopy
(methods, statistics & numerical data)
- Male
- Middle Aged
- Occipital Lobe
(drug effects, physiopathology)
- Phosphocreatine
(analysis, chemistry)
- Treatment Outcome
- Vigabatrin
(pharmacology, therapeutic use)
- gamma-Aminobutyric Acid
(analysis, chemistry)
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