Influence of Genetic Variations in Selenoprotein Genes on the Pattern of Gene Expression after Supplementation with Brazil Nuts

Autor(es)

Donadio, Janaina L. S. ; Rogero, Marcelo M. ; Cockell, Simon ; Hesketh, John ; Cozzolino, Silvia M. F.

• Tipo de documento: Artigo Científico
• Fonte: NUTRIENTS; v. 9, n. 7 JUL 2017.
• Citações Web of Science: 5

Resumo

Selenium (Se) is an essential micronutrient for human health. Its beneficial effects are exerted by selenoproteins, which can be quantified in blood and used as molecular biomarkers of Se status. We hypothesize that the presence of genetic polymorphisms in selenoprotein genes may: (1) influence the gene expression of specific selenoproteins and (2) influence the pattern of global gene expression after Brazil nut supplementation. The study was conducted with 130 healthy volunteers in Sao Paulo, Brazil, who consumed one Brazil nut (300 mu g/Se) a day for eight weeks. Gene expression of GPX1 and SELENOP and genotyping were measured by real-time PCR using TaqMan Assays. Global gene expression was assessed by microarray using Illumina HumanHT-12 v4 BeadChips. Brazil nut supplementation significantly increased GPX1 mRNA expression only in subjects with CC genotype at rs1050450 (p < 0.05). SELENOP mRNA expression was significantly higher in A-carriers at rs7579 either before or after supplementation (p < 0.05). Genotype for rs713041 in GPX4 affected the pattern of blood cell global gene expression. Genetic variations in selenoprotein genes modulated both GPX1 and SELENOP selenoprotein gene expression and global gene expression in response to Brazil nut supplementation. (AU)

• Processo FAPESP: 11/17720-0 - Influência de diferentes genótipos no perfil de expressão de selenoproteínas em resposta à suplementação com selênio
• Beneficiário: Janaina Lombello Santos Donadio
• Modalidade de apoio: Bolsas no Brasil - Doutorado