Selenium as a chemoprotective anti-cancer agent: reality or wishful thinking?

Area of Science:

• Biochemistry
• Oncology
• Nutritional Science

Background:

• Selenium (Se) is vital for organismal homeostasis and influences carcinogenesis, including tumor inhibition.
• Experimental and clinical data suggest a link between Se supplementation and reduced incidence of prostate, lung, liver, and colon tumors.

Purpose of the Study:

• To review the current understanding of selenium's biological roles in cancer prevention.
• To evaluate the prospects for selenium's future clinical application in cancer chemoprevention.

Main Methods:

• Comprehensive review of existing scientific literature on selenium's effects.
• Evaluation of data from experimental animal models and human clinical studies.
• Analysis of selenium's efficacy in combination with other bioactive agents and anticancer drugs.

Main Results:

• Selenium (Se) supplementation is correlated with lower tumor frequency across multiple cancer types.
• The precise mechanisms by which Se modulates carcinogenesis remain incompletely understood.
• Existing data are insufficient to broadly recommend Se for cancer chemoprevention.

Conclusions:

• Further controlled experimental and clinical studies are necessary to validate the potential of Se in cancer prevention.
• The role of Se deficiency as a cancer risk factor requires further investigation.
• Understanding the influence of confounding factors like age, lifestyle, and comorbidities is crucial for future research.