Association of sirtuin 1 (SIRT1) gene SNPs and transcript expression levels with severe obesity

Stephen J Clark, Mario Falchi, Bob Olsson, Peter Jacobson, Stéphane Cauchi, Beverley Balkau, Michel Marre, Olivier Lantieri, Johanna C Andersson, Margareta Jernås, Timothy J Aitman, Sylvia Richardson, Lars Sjöström, Hang Y Wong, Lena M S Carlsson, Philippe Froguel, Andrew J Walley

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

Recent studies have reported associations of sirtuin 1 (SIRT1) single nucleotide polymorphisms (SNPs) to both obesity and BMI. This study was designed to investigate association between SIRT1 SNPs, SIRT1 gene expression and obesity. Case-control analyses were performed using 1,533 obese subjects (896 adults, BMI >40 kg/m(2) and 637 children, BMI >97th percentile for age and sex) and 1,237 nonobese controls, all French Caucasians. Two SNPs (in high linkage disequilibrium (LD), r(2) = 0.96) were significantly associated with adult obesity, rs33957861 (P value = 0.003, odds ratio (OR) = 0.75, confidence interval (CI) = 0.61-0.92) and rs11599176 (P value: 0.006, OR = 0.74, CI = 0.61-0.90). Expression of SIRT1 mRNA was measured in BMI-discordant siblings from 154 Swedish families. Transcript expression was significantly correlated to BMI in the lean siblings (r(2) = 0.13, P value = 3.36 × 10(-7)) and lower SIRT1 expression was associated with obesity (P value = 1.56 × 10(-35)). There was also an association between four SNPs (rs11599176, rs12413112, rs33957861, and rs35689145) and BMI (P values: 4 × 10(-4), 6 × 10(-4), 4 × 10(-4), and 2 × 10(-3)) with the rare allele associated with a lower BMI. However, no SNP was associated with SIRT1 transcript expression level. In summary, both SNPs and SIRT1 gene expression are associated with severe obesity.

Original languageEnglish
Pages (from-to)178-85
Number of pages8
JournalObesity
Volume20
Issue number1
DOIs
Publication statusPublished - Jan 2012

Keywords / Materials (for Non-textual outputs)

  • Adolescent
  • Adult
  • Body Mass Index
  • Case-Control Studies
  • Child
  • European Continental Ancestry Group
  • Female
  • Gene Expression Regulation, Enzymologic
  • Genetic Predisposition to Disease
  • Humans
  • Male
  • Obesity, Morbid
  • Odds Ratio
  • PPAR gamma
  • Polymorphism, Single Nucleotide
  • Siblings
  • Sirtuin 1
  • Sweden
  • Up-Regulation

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