Wynik wyszukiwania w bazie Polska Bibliografia Lekarska GBL

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Tytuł oryginału: Interaction of the neurosteroid alphaxalone with conventional antiepileptic drugs in different types of experimental seizures.
Autorzy: Borowicz Kinga K., Zadrożniak Marek, Świąder Mariusz, Kowalska Aneta, Kleinrok Zdzisław, Czuczwar Stanisław J.
Źródło: Eur. J. Pharmacol. 2002: 449 (1/2) s.85-90, tab., bibliogr. [30] poz.
Sygnatura GBL: 312,088

Hasła klasyfikacyjne GBL:
  • farmacja
  • neurologia

    Typ dokumentu:
  • praca doświadczalna
  • praca opublikowana za granicą
  • tytuł obcojęzyczny

    Wskaźnik treści:
  • zwierzęta
  • myszy
  • szczury

    Streszczenie angielskie: A number of neurosteroids exert antiseizure and/or neuroprotective properties. The aim of this study was to evaluate the effect of the neurosteroid alphalone on the protective action of conventional antiepileptics in four seizure test. Alphaxalone (up to 5 mg/kg) did not exert a signifcant action against amygdala-kindled seizures in rats, or against pentetrazole- or aminophylline-induced convulsion in mice. The neuroactive steroid at the dose of 2.5 mg/kg significantly raised the threshold for electroconvulsions in mice. at 2.5 mg/kg, alpaxalone diminished the protective activity of valproate against maximal electroshock and at 2.5 - 5 mg/kg against pentetrazole-induced seizures in mice. However, alphaxalone (2.5 mg/kg) did not affect the protective activity of carbamazepine, diphenylhydantoin, phenobarbital or clonazepam against maximal electroshock and 5 mg/kg did not affect that of phenobarbital, clonazepan and ethosuximide against pentetrazole-induced convulsions. Insignificant results were also obtained in the case of co-administration of alphaxalone with phenobarbital, valproate, clonazepam and carbamazepine against aminophylline-evoked seizures in mice. Also, in the kindling model of epilepsy, combinations of the neuroactive steroid (2.5 mg/kg) with valproate, carbamazepine, phenobarbital, diphenylhydantoin or clonazepam at their subprotective doses did not result in pro- or anticonvulsant activity. Valproate (284 mg/kg; the dose used in combination with alphaxalone) produced sgnificant memory deficits in mice. Alpxaxalone (2.5 mg/kg), valproate...

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    Tytuł oryginału: Low-affinity kainate receptor-mediated events reduce the protective activity of phenobarbital and diphenylhydantoin against maximal electroshock in mice.
    Autorzy: Borowicz K. K., Zadrożniak M., Czuczwar S[tanisław] J.
    Źródło: Neuropharmacology 2002: 43 (7) s.1082-1086, tab., bibliogr. [28] poz.
    Sygnatura GBL: 305,141

    Hasła klasyfikacyjne GBL:
  • farmacja
  • neurologia

    Typ dokumentu:
  • praca doświadczalna
  • praca opublikowana za granicą
  • tytuł obcojęzyczny

    Wskaźnik treści:
  • zwierzęta
  • myszy
  • płeć męska

    Streszczenie angielskie: (2S, 2R)-4-Methylglutamic acid (SYM 2081), a potent selective agonist of GluR5 and GluR6 kainate receptor subtypes, applied at the dose of 15.5 mg/kg, equal to its CD16 value (i.e., a dose required to induce convulsions in 16 p.c. of mice), significantly decreased the electroconvulsive threshold from 7.0 to 5.8 mA. When administered at the dose of 11.5 mg/kg, equal to 75 p.c. of its CD16, it markedly attenuated the protective activity of phenobarbital and diphenylhydantoin, but not that valproate, carbamazepine, or diazepam against maximal electroshock-induced seizures in mice. The respective ED50 values were increased from 18.5 to 23.8 mg/kg for phenobarbital, and from 11.7 to 14.7 mg/kg for diphenylhydantoin. Since the free plasma levels of tboth antiepileptic drugs were not influenced by SYM 2081, the pharmacokinetic interaction does not seem to be involved in the observed results. In conclusion, low-affinity kainate receptor-mediated events might be a factor reducing the protective efficacy of some anitepileptic drugs. Furthermore, the activation of GLuR5 and GluR6 kainate receptor subtypes by endogenous glutamate during seizures may be associated with the drug-resistance phenomenon.

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