Obesity susceptibility loci in Qataris, a highly consanguineous Arabian population

作者：Tomei Sara^*; Mamtani Ravinder; Al Ali Rashid; Elkum Naser; Abdulmalik Maryam; Ismail Awatef; Cheema Sohaila; Rouh Hekmat A; Aigha Idil I; Hani Fatima; Al Samraye Sura; Aseel Mona Taher; El Emadi Nada; Al Mujalli Azza; Abdelkerim Ahmed; Youssif Siddik; Worschech Andrea; El Sebakhy Emad; Temanni Ramzi; Khanna Vineesh; Wang Ena; Kizhakayil Dhanya; Al Thani Al Anood; Al Thani Mohammed; Lowenfels Albert; Marincola Francesco M; Sheikh Javaid; Chouchane Lotfi

来源：Journal of Translational Medicine, 2015, 13(1): 119.

DOI：10.1186/s12967-015-0459-3

• Single Nucleotide Polymorphism (SNP)
• Genotyping
• Qatar
• Obesity
• Body mass index

Objectives: In Qataris, a population characterized by a small size and a high rate of consanguinity, between two-thirds to three-quarters of adults are overweight or obese. We investigated the relevance of 23 obesity-related loci in the Qatari population.
Methods: Eight-hundred-four individuals assessed to be third generation Qataris were included in the study and assigned to 3 groups according to their body mass index (BMI): 190 lean (BMI < 25 kg/m(2)); 131 overweight (25 kg/m(2) <= BMI < 30 kg/m(2)) and 483 obese (BMI >= 30 kg/m(2)). Genomic DNA was isolated from peripheral blood and genotyped by TaqMan.
Results: Two loci significantly associated with obesity in Qataris: the TFAP2B variation (rs987237) (A allele versus G allele: chi-square = 10.3; P = 0.0013) and GNPDA2 variation (rs10938397) (A allele versus G allele: chi-square = 6.15; P = 0.013). The TFAP2B GG genotype negatively associated with obesity (OR = 0.21; P = 0.0031). Conversely, the GNDPA2 GG homozygous genotype associated with higher risk of obesity in subjects of age < 32 years (P = 0.0358).
Conclusion: We showed a different genetic profile associated with obesity in the Qatari population compared to Western populations. Studying the genetic background of Qataris is of primary importance as the etiology of a given disease might be population-specific.

• 出版日期2015-4-13