The carotenoid lycopene protects rats against DNA damage induced by Ochratoxin A

Area of Science:

• Toxicology
• Nutritional Science
• Molecular Biology

Background:

• Ochratoxin A (OTA) is a prevalent mycotoxin with known nephrotoxic and hepatotoxic effects.
• Lycopene, a potent antioxidant carotenoid, possesses significant free-radical scavenging capabilities.
• Understanding the protective mechanisms of antioxidants against mycotoxin-induced genotoxicity is crucial for public health.

Purpose of the Study:

• To investigate the potential protective role of lycopene against Ochratoxin A (OTA)-induced genotoxicity.
• To evaluate OTA-induced DNA damage in rat kidney and liver cells using the alkaline comet assay.
• To assess the dose-dependent and duration-dependent effects of lycopene supplementation.

Main Methods:

• Male Sprague-Dawley rats were administered Ochratoxin A (OTA) (0.5 mg/kg b.w./day) via gavage for 14 days.
• Lycopene was administered concurrently with OTA for the final 7 or 14 days of the treatment period.
• The alkaline comet assay was employed to measure DNA damage in lymphocytes, renal, and hepatic cells.

Main Results:

• OTA exposure significantly increased DNA damage (tail length, tail moment, tail intensity) in kidney and liver cells, but not lymphocytes.
• Lycopene administration alone did not induce significant DNA damage in any tested cell type.
• Lycopene supplementation (7 and 14 days) significantly reduced OTA-induced DNA damage in renal and hepatic cells, with 14 days showing greater protection, especially in hepatic cells.

Conclusions:

• Lycopene demonstrates significant protective effects against Ochratoxin A-induced genotoxicity in rat hepatic and renal tissues.
• The protective effect of lycopene appears to be duration-dependent, with longer supplementation periods yielding better results.
• These findings suggest lycopene as a potential dietary intervention to mitigate Ochratoxin A-related tissue damage.