Abstract
Post-injury sprouting of hippocampal mossy fibers has been suggested to be a causal mechanism underlying the development of temporal lobe epilepsy. However, this hypothesis rests entirely on indirect correlational evidence. Here we demonstrate that cycloheximide, a protein synthesis inhibitor, blocked pilocarpine- and kainate-induced mossy fiber sprouting in rats, but did not prevent the subsequent development of spontaneous seizures or affect their frequency. These results provide direct evidence against a causal role for mossy fiber sprouting in temporal lobe epileptogenesis.
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