Protective effect of melatonin against mitomycin C-induced genotoxic damage in peripheral blood of rats

Area of Science:

• Toxicology
• Biochemistry
• Pharmacology

Background:

• Mitomycin C (MMC) is a chemotherapeutic agent known to generate free radicals during metabolism.
• Free radical generation by MMC can lead to cellular damage, including genotoxicity.
• Lipid peroxidation is another indicator of oxidative stress that may be induced by MMC.

Purpose of the Study:

• To investigate the protective effects of melatonin against Mitomycin C-induced genotoxicity.
• To assess the impact of melatonin on Mitomycin C-induced lipid peroxidation in rat brain and liver homogenates.

Main Methods:

• Rats were divided into four groups: control, melatonin, MMC, and MMC + melatonin.
• MMC (2 mg/kg) and melatonin (10 mg/kg) were administered intraperitoneally.
• Genotoxicity was assessed by counting micronucleated polychromatic erythrocytes (MN-PCE) in peripheral blood.
• Lipid peroxidation was measured by quantifying malondialdehyde (MDA) and 4-hydroxyalkenal (4-HDA) levels in brain and liver homogenates.

Main Results:

• Mitomycin C administration significantly increased the number of MN-PCE at 24, 48, 72, and 96 hours post-treatment.
• Co-administration of melatonin significantly reduced the MMC-induced increase in MN-PCE.
• No significant differences in lipid peroxidation levels were observed between the groups.

Conclusions:

• Melatonin demonstrates a protective effect against Mitomycin C-induced genotoxicity in polychromatic erythrocytes.
• Melatonin may serve as a potential agent to mitigate the genotoxic side effects of Mitomycin C.
• Further research is needed to elucidate the mechanisms underlying melatonin's protective action and its effects on lipid peroxidation.