Melatonin is effective in attenuating cisplatin-induced neurotoxicity

Area of Science:

• Neuroscience
• Pharmacology
• Toxicology

Background:

• Cisplatin (Cis) is a vital chemotherapy drug with significant neurotoxic side effects.
• Oxidative stress and neuroinflammation are key mechanisms underlying cisplatin-induced neurotoxicity.

Purpose of the Study:

• To investigate the potential of melatonin (Mel), an antioxidant and anti-inflammatory agent, in preventing cisplatin-induced neurotoxicity.
• To evaluate the effects of melatonin on cognitive, motor, and sensory functions in a rat model of cisplatin neurotoxicity.

Main Methods:

• Forty-eight male Sprague-Dawley rats were divided into control, vehicle, cisplatin, cisplatin + vehicle, melatonin, and cisplatin + melatonin groups.
• Cisplatin was administered intraperitoneally, followed by behavioral tests (T-maze, rotarod, hot plate) and analysis of brain homogenates for oxidative stress markers, cholinergic function, and proinflammatory cytokines.

Main Results:

• Cisplatin administration impaired cognitive and motor functions and increased oxidative stress in the brain.
• Melatonin treatment significantly improved the brain's oxidant/antioxidant balance.
• Melatonin administration reduced the overproduction of proinflammatory cytokines, such as tumor necrosis factor-alpha.

Conclusions:

• Melatonin demonstrates potential in ameliorating cisplatin-induced neurotoxicity.
• Further research with varied melatonin doses and larger sample sizes is warranted to confirm these findings.