Anticonvulsion effect of acupuncture might be related to the decrease of neuronal and inducible nitric oxide...

Area of Science:

• Neuroscience
• Pharmacology
• Biochemistry

Background:

• Epilepsy is a neurological disorder characterized by recurrent seizures.
• Nitric oxide synthase (NOS) plays a role in neuronal function and has been implicated in epilepsy.
• Understanding the role of different NOS isoforms in epilepsy is crucial for developing effective treatments.

Purpose of the Study:

• To investigate the changes in hippocampal nitric oxide synthase (NOS) isoform levels during penicillin-induced epilepsy in rats.
• To evaluate the effect of electroacupuncture (EA) on these NOS isoform levels in the epileptic model.

Main Methods:

• Epilepsy was induced in Wistar rats by injecting penicillin into the hippocampus.
• Electroacupuncture (EA) was applied to "Feng Fu" (DU 16) and "Jin Suo" (DU 8) acupoints.
• Hippocampal nitric oxide synthase (NOS) mRNA levels were quantified using reverse transcription-polymerase chain reaction (RT-PCR).

Main Results:

• Penicillin-induced epilepsy significantly increased neuronal nitric oxide synthase (nNOS) and inducible nitric oxide synthase (iNOS) mRNA levels in the hippocampus (P<0.01).
• Epithelial nitric oxide synthase (eNOS) mRNA levels showed no significant change.
• EA treatment inhibited epilepsy and correspondingly decreased nNOS and iNOS mRNA levels (P<0.01), without affecting eNOS mRNA.

Conclusions:

• Penicillin-induced epilepsy is associated with increased hippocampal expression of nNOS and iNOS.
• The anticonvulsant effects of EA may be mediated by the downregulation of nNOS and iNOS.
• These findings highlight the potential of EA as a therapeutic strategy for epilepsy by modulating NOS pathways.