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Selenium (Se) and selenoproteins are vital for cellular health and disease prevention. Genetic variations influence how Se affects chronic disease risk, highlighting the need for personalized health approaches.

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Area of Science:

  • Nutritional genomics
  • Molecular biology
  • Chronic disease research

Background:

  • Selenium (Se) and selenoproteins play crucial roles in cellular maintenance, oxidative stress response, and protein folding.
  • Epidemiological studies link low Se intake to increased chronic disease risk, but supplementation trials yield inconsistent results.
  • Genetic factors, including single nucleotide polymorphisms (SNPs) affecting Se metabolism and selenoprotein activity, likely modulate Se's health impact.

Purpose of the Study:

  • To review genetic associations between Se metabolism, selenoproteins, and chronic disease risk.
  • To explore the influence of genetic variants and Se status on disease aetiology.
  • To emphasize the need for integrated approaches considering Se status, genetics, and environmental factors.

Main Methods:

  • Review of mechanistic data on Se and selenoproteins in biological pathways.
  • Analysis of epidemiological studies linking Se intake to chronic diseases.
  • Examination of genetic association studies identifying SNPs in Se-related genes.
  • Investigation of interactions between SNPs, Se status biomarkers, and disease risk.

Main Results:

  • Mechanistic data confirm Se and selenoproteins' importance in pathways relevant to multifactorial diseases.
  • Genetic variations (SNPs) in Se metabolism and selenoprotein genes are associated with increased risk for chronic diseases, notably cancer.
  • Interactions between SNPs, related pathways, and Se status biomarkers further modulate genetic risk.
  • Nutritional genomics approaches reveal the role of selenoproteins and complex gene-environment interactions in chronic disease.

Conclusions:

  • Genetic factors significantly influence the relationship between selenium status and chronic disease risk.
  • Complex interactions between genetic variants, Se status, and environmental factors are critical in disease aetiology.
  • Future research should integrate Se status, environmental stress, and multiple genetic variations to accurately assess disease risk.