title: Antimuscarinic-induced convulsions in fasted animals after food intake: evaluation of the effects of levetiracetam, topiramate and different doses of atropine.
abstract: This study evaluated the effects of different doses of atropine and new antiepileptics, levetiracetam and topiramate, on the development of convulsions triggered by food intake in antimuscarinic-treated fasted animals. Mice deprived of food for 24 h and treated i.p. with atropine at a dose of 2.4 or 24 mg/kg developed convulsions after being allowed to eat ad libitum. No convulsions were observed in fasted animals treated with 0.24 mg/kg atropine. There was no difference in the incidence of convulsions between the two atropine treatments, but latency to convulsions was longer in 24 mg/kg atropine treated animals. The lowest dose of atropine, 0.24 mg/kg, caused stage 1 and stage 2 activity, but did not provide the convulsive endpoint (stage 3, 4, 5 activity). Administration of levetiracetam (50 or 200 mg/kg) or topiramate (50 or 100 mg/kg) to another group of 24-h fasted mice was ineffective in reducing the incidence of convulsions developed in the animals after 2.4 mg/kg atropine treatment and food intake. However, the higher dose of levetiracetam prolonged the onset of convulsions. Present results demonstrated the efficacy of low and high doses of atropine on the development of convulsions in fasted animals and provided additional evidence for the ineffectiveness of antiepileptic treatment in these seizures.
authors.affiliation: Department of Pharmacology, Istanbul Faculty of Medicine, Istanbul University, Çapa, 34093, Istanbul, Turkey.
authors.forename: Bahar
authors.initials: B
authors.lastname: Büget
authors.affiliation: Department of Neuroscience, Institute for Experimental Medicine (DETAE), Istanbul University, Istanbul, Turkey.
authors.forename: Aslı Zengin
authors.initials: AZ
authors.lastname: Türkmen
authors.affiliation: Department of Pharmacology, Istanbul Faculty of Medicine, Istanbul University, Çapa, 34093, Istanbul, Turkey.
authors.forename: Oruc
authors.initials: O
authors.lastname: Allahverdiyev
authors.affiliation: Department of Pharmacology, Istanbul Faculty of Medicine, Istanbul University, Çapa, 34093, Istanbul, Turkey. engnur@istanbul.edu.tr.
authors.forename: Nurhan
authors.initials: N
authors.lastname: Enginar
mesh_terms: D000818:Animals; D000927:Anticonvulsants / Q000627:therapeutic use*; D001285:Atropine / Q000008:administration & dosage* / Q000009:adverse effects; D004435:Eating; D005215:Fasting; D005632:Fructose / Q000031:analogs & derivatives* / Q000627:therapeutic use; D000077287:Levetiracetam; D008297:Male; D008807:Mice, Inbred BALB C; D018727:Muscarinic Antagonists / Q000008:administration & dosage* / Q000009:adverse effects; D010889:Piracetam / Q000031:analogs & derivatives* / Q000627:therapeutic use; D012640:Seizures / Q000139:chemically induced / Q000188:drug therapy*; D000077236:Topiramate
chemical_list: D000927:Anticonvulsants; D018727:Muscarinic Antagonists; D000077236:Topiramate; D005632:Fructose; D000077287:Levetiracetam; D001285:Atropine; D010889:Piracetam
keywords: Atropine-induced convulsion; Food deprivation; Food intake; Levetiracetam; Topiramate