Zonisamide attenuates hyperoxia-induced apoptosis in the developing rat brain.

Area of Science:

• Neonatal neurology
• Neuropharmacology
• Oxidative stress injury

Background:

• Perinatal hypoxia treatment with oxygen can cause neurodegeneration in infants due to underdeveloped antioxidant systems.
• Zonisamide is an antiepileptic drug with demonstrated neuroprotective properties.
• The effect of zonisamide on hyperoxic brain injury has not been previously studied.

Purpose of the Study:

• To investigate the potential neuroprotective effect of zonisamide in a model of hyperoxia-induced neonatal brain injury.
• To evaluate zonisamide's efficacy in preserving neuronal integrity and reducing apoptosis in the developing brain under hyperoxic conditions.

Main Methods:

• Wistar rat pups were divided into control, hyperoxia, and zonisamide-treated groups.
• Zonisamide was administered via intraperitoneal injection to the treatment group.
• Neuronal counts and apoptotic cell numbers were assessed in the hippocampus, prefrontal cortex, and parietal cortex.

Main Results:

• Zonisamide treatment significantly preserved neuronal numbers in the hippocampus (CA1 and dentate gyrus), prefrontal cortex, and parietal cortex.
• Zonisamide administration markedly reduced the number of apoptotic neurons across all examined brain regions.
• These findings indicate a protective role of zonisamide against hyperoxia-induced neuronal damage.

Conclusions:

• Zonisamide demonstrates significant neuroprotective effects against hyperoxia-induced brain injury in neonatal rats.
• Zonisamide may serve as a therapeutic agent to mitigate brain damage caused by hyperoxia in newborns.
• Further research is warranted to explore clinical applications of zonisamide for neonatal hyperoxic brain injury.