Vigabatrin has antiepileptogenic and antidepressant effects in an animal model of epilepsy and depression comorbidity

To evaluate the effects of Vigabatrin (VGB) treatment, on both absence seizure and depressive-like behaviour development in the WAG/Rij rat model of absence seizures. Early long-term treatment with VGB could alter the development of absence pathology, by significantly reducing seizure generation and synchronization in contrast to its pro-absence effects observed after acute or subchronic administration. We have demonstrated the antidepressant effects of a sub-chronic treatment with VGB in both wistar and WAG/Rij rats. In contrast, following an early long-term treatment, VGB antidepressant effects were only observable in WAG/Rij rats. In conclusion, VGB has antiepileptogenic and antidepressant properties in the WAG/Rij rat model despite its pro-absence effects suggesting that epilepsy and depression, in this animal model, are directly related and that seizure development inhibition also reduces the development of depressive behaviour. (C) 2011 Elsevier B.V. All rights reserved.