title: Effects of caffeine on cortical epileptic afterdischarges in adult rats are modulated by postnatal treatment.
abstract: We have previously shown that the effect of acute caffeine injection on cortical epileptic afterdischarges (ADs) in immature rats can be modulated by the postnatal period of repeated caffeine treatment and age of testing during development. To know if these changes persist into adulthood, in the present study adult rats, previously exposed to caffeine from postnatal day 7-11 (10 and 20 mg/kg), and injected with caffeine (10 and 20 mg/kg), respectively, at P67 were compared with groups of naive rats on cortical epileptic ADs. Low-frequency stimulation of sensorimotor cortical area was applied repeatedly with increasing intensity of stimulation current. The acute caffeine injection decreased the thresholds for both the spike-and-wave ADs and accompanying clonic seizures in naive adult rats. In contrast, the acute caffeine administration applied to rats with postnatal caffeine treatment did not change the thresholds for ADs and clonic seizures. In addition, a shorter duration of ADs was registered at some stimulation intensities in rats with early postnatal caffeine administration. Present results demonstrated failure of proconvulsant effects of caffeine after repeated caffeine administration during the early postnatal period persisting up to adulthood.
authors.affiliation: Institute of Neurobiology, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 23, 1113, Sofia, Bulgaria, janetchekalarova@gmail.com.
authors.forename: Jana
authors.initials: J
authors.lastname: Tchekalarova
authors.forename: Hana
authors.initials: H
authors.lastname: Kubová
authors.forename: Pavel
authors.initials: P
authors.lastname: Mareš
mesh_terms: D000375:Aging; D000818:Animals; D002110:Caffeine / Q000008:administration & dosage / Q000009:adverse effects*; D000697:Central Nervous System Stimulants / Q000008:administration & dosage / Q000009:adverse effects*; D002540:Cerebral Cortex / Q000187:drug effects*; D004195:Disease Models, Animal; D004558:Electric Stimulation; D004569:Electroencephalography; D004827:Epilepsy / Q000139:chemically induced; D008297:Male; D051381:Rats; D017208:Rats, Wistar; D012640:Seizures / Q000139:chemically induced
chemical_list: D000697:Central Nervous System Stimulants; D002110:Caffeine