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Related Experiment Videos

Selenium and cancer: some nutritional aspects.

M S Alaejos1, F J Díaz Romero, C Díaz Romero

  • 1Department of Analytical Chemistry, Nutrition and Food Sciences, University of La Laguna, La Laguna, Tenerife, Spain.

Nutrition (Burbank, Los Angeles County, Calif.)
|May 4, 2000
PubMed
Summary

Selenium levels are lower in cancer patients, but this may be due to malnutrition. While some studies link high selenium intake to lower cancer mortality, others show conflicting results, suggesting nutrient interactions are key.

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Area of Science:

  • Oncology
  • Nutritional Science
  • Biochemistry

Background:

  • Selenium levels are often lower in cancer patients compared to healthy individuals.
  • Malnutrition in cancer patients can contribute to low selenium levels, complicating direct correlations.
  • Epidemiological studies suggest a link between high dietary selenium and reduced cancer mortality, but findings are not always consistent.

Purpose of the Study:

  • To explore the complex relationship between selenium status and cancer etiology.
  • To investigate the influence of other nutrients on selenium's role in cancer prevention.
  • To identify factors that may antagonize or synergize with selenium's potential anti-cancer effects.

Main Methods:

  • Review of epidemiological and prospective studies on selenium intake and cancer.

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  • Analysis of the role of co-existing nutrients in selenium's biological activity.
  • Examination of nutrient interactions affecting cancer prevention.

    • Main Results:

    • Conflicting evidence exists regarding the association between selenium status and cancer mortality.
    • The presence of other nutrients in selenium-rich foods significantly modulates selenium's effect on cancer.
    • Certain elements and antioxidants (e.g., ascorbic acid, retinol, beta-carotene, alpha-tocopherol) can have synergistic effects with selenium in cancer prevention.

    Conclusions:

    • The role of selenium in cancer prevention is complex and influenced by dietary context.
    • Antagonistic and synergistic interactions with other micronutrients affect selenium's impact on cancer etiology.
    • Further research is needed to fully elucidate the interplay of nutrients in cancer prevention strategies.