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Anticonvulsant and proconvulsant roles of nitric oxide in experimental epilepsy models BJMBR
Del-Bel,E.A.; Oliveira,P.R.; Oliveira,J.A.C.; Mishra,P.K.; Jobe,P.C.; Garcia-Cairasco,N..
The effect of acute (120 mg/kg) and chronic (25 mg/kg, twice a day, for 4 days) intraperitonial injection of the nitric oxide (NO) synthase (NOS) inhibitor NG-nitro-L-arginine (L-NOARG) was evaluated on seizure induction by drugs such as pilocarpine and pentylenetetrazole (PTZ) and by sound stimulation of audiogenic seizure-resistant (R) and audiogenic seizure-susceptible (S) rats. Seizures were elicited by a subconvulsant dose of pilocarpine (100 mg/kg) only after NOS inhibition. NOS inhibition also simultaneously potentiated the severity of PTZ-induced limbic seizures (60 mg/kg) and protected against PTZ-induced tonic seizures (80 mg/kg). The audiogenic seizure susceptibility of S or R rats did not change after similar treatments. In conclusion,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Experimental epilepsy; Seizures; Forebrain; Brainstem; Pilocarpine; Pentylenetetrazol; Audiogenic seizures; Genetically epilepsy-prone rats; GEPR; Nitric oxide.
Ano: 1997 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1997000800010
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Induction of Fos protein immunoreactivity by spinal cord contusion BJMBR
Del-Bel,E.A.; Borges,C.A.G.; Defino,H.L.A.; Guimarães,F.S..
The objective of the present study was to identify neurons in the central nervous system that respond to spinal contusion injury in the rat by monitoring the expression of the nuclear protein encoded by the c-fos gene, an activity-dependent gene, in spinal cord and brainstem regions. Rats were anesthetized with urethane and the injury was produced by dropping a 5-g weight from 20.0 cm onto the exposed dura at the T10-L1 vertebral level (contusion group). The spinal cord was exposed but not lesioned in anesthetized control animals (laminectomy group); intact animals were also subjected to anesthesia (intact control). Behavioral alterations were analyzed by Tarlov/Bohlman scores, 2 h after the procedures and the animals were then perfused for...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Fos immunohistochemistry; Intermediolateral column neurons; Reticular formation; Area postrema; Dorsal horn; Solitary tract nuclei; Laminectomy; Spinal cord injury.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2000000500006
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