Изменения функциональной активности лимфоцитов у киндлинговых крыс и эффекты пентоксифиллина

Under condition of acute experiments on male Wistar rats it was shown that under condition of kindling formation induced via repeated subthreshold corazol administration (30,0 mg/kg, i.p.) the decreasing of blastogenic response induced by bacterial lypopolysaccharide and phytogemagglutinin was shown. This effect was detectable after 10-th convulsant injection and intensified in the course of kindling (21 injections of picrotoxin). Pentoxiphyllin (25,0 and 50,0 mg/kg, i.p.) caused antiseizure effects and effectively prevented kindling-induced decreasing of blastogenic response in dose-depended manner.В условиях острых опытов на крысах-самцах линии Вистар показано, что при формировании киндлинга с помощью повторного применения первоначально подпороговой дозы коразола (30,0 мг/кг, внутрибрюшинно) происходит снижение выраженности бластной трансформации лимфоцитов, вызываемой с помощью бактериального липополисахарида и фитогемагглютинина. Данный эффект обнаруживается после 10 инъекций конвульсанта и его выраженность увеличивается при сформированном киндлинге (21 инъекция). Применение пентоксифиллина (25,0-50,0 мг/кг, в/бр) предотвращает развитие эпилептогенных эффектов коразола, уменьшает выраженность эффекта подавления бласттрансформации лимфоцитов

Влияние электрической стимуляции (эс) палеоцеребеллярной коры на пенициллин-вызванные очаги эпилептической активности в коре головного мозга киндлинговых крыс

Electrical stimulation (ES) (0,25 ms, 100 Hz, 150-250 mcА) of paleocerebellar cortex (pyramis and culmen) caused the suppression of epileptogenic foci, induced in frontal cortex via application of penicillin solution (16 000 IU/ml) to male Wistar rats in three weeks from the moment of last corazol kindled administration. Antiepileptic effects have been pronounced in form of suppression of amplitude and frequency of spikes as well as in the net shortening of life-span of foci. Lower and higher intensities of ES did not cause suppression of focal epileptogenesis.Электрическая стимуляция (ЭС) (0,25 мс, 100 Гц, 150-250 мкА) палеоцеребеллярной коры (пирамидная долька, верхушка), осуществляемая через три недели после последнего киндлингового введения коразола (30,0 мг/кг, в/бр) крысам-самцам линии Вистар, сопровождалась угнетением активности эпилептических очагов, созданных в лобних отделах коры головного мозга аппликацией раствора пенициллина (16 000 МЕ/мл). Противоэпилептическое действие выражалось в подавлении частоты и амплитуды разрядов в очагах, сокращении времени их существования. ЭС меньшей или более высокой интенсивности не вызывало эффекта подавления очаговой эпилептической активности

Pentoxifylline potentiates antiepileptic activity of diazepam on the model of treatment-resistant focal epilepsy

Kindling-syndrome was modeled in male Wistar rats using repeated corazole administration (25-30 mg/kg intraperitoneally). The effects of pentoxifylline (25 and 100 mg/kg intraperitoneally) and diazepam (0.05 and 1 mg/kg intraperitoneally) were studied in 3 weeks after kindling development under conditions of acute observation on the model of penicillin-induced foci in cerebral cortex. An anticonvulsant effect of combined treatment with diazepam and pentoxifylline in the doses, ineffective if administered separately (0.05 and 25 mg/kg intraperitoneally), was demonstrated. © 2013 Springer Science+Business Media New York

Are there different mechanisms of synchronization in the course of spike-wave discharges (SDS) burst development in WAG/Rij rats?

Contains fulltext : 56895.pdf ( ) (Open Access)In WAG/Rij rats the pair linear correlation r was calculated for bipolar recordings in fronto-temporal, fronto-occipital and occipito-temporal zones of both hemispheres as well as in paleocerebellar cortex (culmen). It was shown that development of SWD bursts resulted in interhemispheric decreases of correlation between the right occipito-temporal cortical region on one side, and left fronto-temporal on the contralateral side. Towards the end of SWD, we found an increased interhemispheric correlation between left fronto-temporal and right fronto-occipital cortical zones, as well as, between both fronto-temporal zones. Paleocerebellum correlates at a weak to moderate level during different periods of SWD burst generation;6 p

Pentoxifylline potentiates antiepileptic activity of diazepam on the model of treatment-resistant focal epilepsy

Kindling-syndrome was modeled in male Wistar rats using repeated corazole administration (25-30 mg/kg intraperitoneally). The effects of pentoxifylline (25 and 100 mg/kg intraperitoneally) and diazepam (0.05 and 1 mg/kg intraperitoneally) were studied in 3 weeks after kindling development under conditions of acute observation on the model of penicillin-induced foci in cerebral cortex. An anticonvulsant effect of combined treatment with diazepam and pentoxifylline in the doses, ineffective if administered separately (0.05 and 25 mg/kg intraperitoneally), was demonstrated. © 2013 Springer Science+Business Media New York

Functional relationships between brain and cerebellar cortex during absence and clonic seizures

Item does not contain fulltextThe relationships between frontal, temporal, and occipital zones of cortex of both hemispheres and paleocerebellar cortex in Wistar and WAG/Rij rats were investigated with an application of multiple linear regression analyses. Taking into consideration the dependence of epileptiform manifestations on sleep-wakefulness cycle, passive wakefulness state was used for data collection. The process of transition from absence to clonic seizure activity, which was provoked through the administration of sodium benzilpenicillin salt in WAG/Rij rats, was characterized as follows: 1) a preservation of high levels of interaction between brain structures in alpha band; 2) a pronounced decrease of interaction in delta and high-frequency rhythm bands; 3) moderate reduction of interaction between brain structures in the theta range. The increase of the number of connections of cerebellar cortex was marked in the course of transition from absence to clonic seizure activity, which might be in favor for the involvement of the cerebellum in the control of excitability of the brain.14 p