Abstract
In quaking mice (a genetic model of epilepsy with an increased number of noradrenergic neurons) bilateral electrolytic coagulation of locus coeruleus (LC) in adult mice inhibited the convulsions elicited by somatic stimulations while neonatal 6-hydroxydopamine (7-OHDA) treatment remained ineffective upon the convulsions. Biochemical effects of the two treatments differed only in the brainstem where electrolytic lesion decreased while 6-OHDA treatment increased noradrenaline (NA) and 3-methoxy 4-hydroxyphenylethyleneglycol (MHPG) levels. Our results suggest that supernumerary LC neurons mediate the convulsions of the mutants through an action presumably restricted to the brainstem.
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