The genotoxicity of selenium

Area of Science:

• Nutritional biochemistry
• Toxicology
• Cancer research

Background:

• Selenium compounds show anticarcinogenic effects against various cancers in animal models.
• High selenium intake is linked to toxicity, necessitating a balanced understanding of its effects.
• Industrial applications of selenium are widespread, increasing potential exposure.

Purpose of the Study:

• To review experimental evidence on the mutagenic and antimutagenic properties of selenium.
• To consolidate information on selenium's dual role in cancer prevention and genotoxicity.

Main Methods:

• Literature review of studies investigating selenium's effects on mutagenicity and carcinogenicity.
• Compilation of data on various selenium compounds and their reported effects.

Main Results:

• Selenium demonstrates significant anticarcinogenic effects in animal studies for breast, colon, liver, and skin cancers.
• Numerous studies report both mutagenic and antimutagenic effects associated with different selenium compounds.
• Higher selenium intake, beyond nutritional levels, poses toxicity risks.

Conclusions:

• Selenium possesses a complex profile with both beneficial (anticarcinogenic) and detrimental (mutagenic/toxic) properties.
• Further research is needed to fully elucidate the genotoxic and chemopreventive mechanisms of selenium.
• Understanding selenium's dose-dependent effects is crucial for both nutritional supplementation and industrial safety.