T2DM GWAS in the Lebanese population confirms the role of TCF7L2 and CDKAL1 in disease susceptibility

  • Michella Ghassibe-Sabbagh
  • , Marc Haber
  • , Angelique K. Salloum
  • , Yasser Al-Sarraj
  • , Yasmine Akle
  • , Kamal Hirbli
  • , Jihane Romanos
  • , Francis Mouzaya
  • , Dominique Gauguier
  • , Daniel E. Platt
  • , Hatem El-Shanti
  • , Pierre A. Zalloua

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

Genome-wide association studies (GWAS) of multiple populations with distinctive genetic and lifestyle backgrounds are crucial to the understanding of Type 2 Diabetes Mellitus (T2DM) pathophysiology. We report a GWAS on the genetic basis of T2DM in a 3,286 Lebanese participants. More than 5,000,000 SNPs were directly genotyped or imputed using the 1000 Genomes Project reference panels. We identify genome-wide significant variants in two loci CDKAL1 and TCF7L2, independent of sex, age and BMI, with leading variants rs7766070 (OR = 1.39, P = 4.77 × 10-9) and rs34872471 (OR = 1.35, P = 1.01 × 10-8) respectively. The current study is the first GWAS to find genomic regions implicated in T2DM in the Lebanese population. The results support a central role of CDKAL1 and TCF7L2 in T2DM susceptibility in Southwest Asian populations and provide a plausible component for understanding molecular mechanisms involved in the disease.

Original languageBritish English
Article number7351
JournalScientific Reports
Volume4
DOIs
StatePublished - 2014

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