Effects of brain IKKß gene silencing by small interfering RNA on P-glycoprotein expression and brain damage in the rat kainic acid-induced seizure model.
CNS Neurol Disord Drug Targets
; 13(4): 661-72, 2014.
Article
en En
| MEDLINE
| ID: mdl-24040792
ABSTRACT
Multidrug resistance mediated by over-expression of P-glycoprotein (P-gp) in brain is an important mechanism accounting for the drug-therapy failure in epilepsy. Over-expression of P-gp in epilepsy rat brain may be regulated by inflammation and nuclear factor-kappa B (NF-κB) activation. Inhibitory κ B kinase subunit ß (IKKß) is an up-stream molecular controlling NF-κB activation. With the small interfering RNA (siRNA) technique and kainic acid (KA)-induced rat epileptic seizure model, the present study was aimed to further evaluate the role of NF-κB inhibition, via blocking IKKß gene transcription, in the epileptic brain P-gp over-expression, seizure susceptibility, and post-seizure brain damage. siRNA targeting IKKß was administered to rats via intracerebroventricular injection before seizure induction by KA microinjection; scrambled siRNA was used as control. Brain mRNA and protein levels of IKKß and P-gp were detected by RT-PCR and immunohistochemistry. NF-κB activity was measured by electrophoretic mobility shift assay. Latency to grade III or V seizure onset was recorded, brain damage was evaluated by neuronal cell counting and epileptiform activity was monitored by electroencephalography. IKKß siRNA pre-treatment inhibited NF-κB activation and abolished P-gp over-expression in KA-induced epileptic rat brain, accompanied by decreased seizure susceptibility. These findings suggested that epileptogenic-induced P-gp over-expression could be regulated by IKKß through the NF-κB pathway.
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Banco de datos:
MEDLINE
Asunto principal:
Convulsiones
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Encéfalo
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Miembro 1 de la Subfamilia B de Casetes de Unión a ATP
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ARN Interferente Pequeño
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Interferencia de ARN
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Quinasa I-kappa B
Tipo de estudio:
Prognostic_studies
Límite:
Animals
Idioma:
En
Revista:
CNS Neurol Disord Drug Targets
Asunto de la revista:
NEUROLOGIA
/
TERAPIA POR MEDICAMENTOS
Año:
2014
Tipo del documento:
Article