RESUMEN
We investigated the effects of Leontice leontopetalum and Bongardia chrysogonum on apoptosis, gamma-aminobutyric acid (GABAA) receptor positive cell number, cyclin-B1 and bcl-2 levels and oxidative stress in pentylenetetrazol (PTZ) kindling in rats. Kindling was produced by subconvulsant doses of PTZ treatments in rats. Wistar albino rats were divided into 4 groups; Control, PTZ treated (PTZ), PTZ+L. leontopetalum extract treated (PTZ+LLE) and PTZ+B. chrysogonum extract treated (PTZ+BCE) groups. Extracts were given a dose (200 mg/kg) 2h before each PTZ injection. PTZ treatment significantly decreased the glutathione peroxidase (GSH-Px), superoxide dismutase (SOD) activities and bcl-2 levels and increased the total oxidant status (TOS), malondialdehyde (MDA), cyclin B1, oxidative stress index (OSI) and number of neurons that expressed GABAA receptors when compared to the control. LLE and BCE possessed antioxidant activity in the brain and ameliorated PTZ induced oxidative stress, decreased cyclin-B1, increased bcl-2 levels, and kept the GABAA receptor number similar to that of the control despite the PTZ application.
Asunto(s)
Berberidaceae/química , Epilepsia/inducido químicamente , Epilepsia/patología , Excitación Neurológica/efectos de los fármacos , Neuroprotección/efectos de los fármacos , Estrés Oxidativo/efectos de los fármacos , Extractos Vegetales/farmacología , Animales , Ciclina B1/metabolismo , Epilepsia/tratamiento farmacológico , Glutatión Peroxidasa/metabolismo , Hipocampo/efectos de los fármacos , Hipocampo/metabolismo , Masculino , Malondialdehído/metabolismo , Pentilenotetrazol , Extractos Vegetales/uso terapéutico , Ratas Wistar , Receptores de GABA/metabolismo , Superóxido Dismutasa/metabolismoRESUMEN
BACKGROUND/AIMS: We aimed to investigate the hepatoprotective effects of dihydromyrcenol and geranyl formate extracted from the Vitis vinifera L. plant in a rat model of acute hepatic injury induced by carbon tetrachloride. METHODS: The study was performed on 54 Sprague-Dawley male rats. The animals were divided into 9 study groups with 6 rats in each. At the end of the 7-day study period, the animals were sacrificed. The effects of dihydromyrcenol and geranyl formate on hepatic injury were evaluated based on the comparisons of the changes in the weight, serum levels of alanine aminotransferase and aspartate aminotransferase, and histopathological changes in the liver. RESULTS: Dihydromyrcenol significantly reduced the carbon tetrachloride-associated ballooning degeneration and apoptotic cell counts; this reduction was moderate with low doses of geranyl formate, while no reductions were observed with high doses of geranyl formate. The changes in the alanine aminotransferase and aspartate aminotransferase levels were in accordance with these findings. CONCLUSIONS: It can be concluded that in an experimental model of acute hepatic injury induced by carbon tetrachloride, dihydromyrcenol presents a hepatoprotective effect, while geranyl formate presents partial hepatoprotective effects at low doses and no hepatoprotective effects at high doses.