4.5 Article

Association between BBS6/MKKS gene polymorphisms, obesity and metabolic syndrome in the Greek population

Journal

INTERNATIONAL JOURNAL OF OBESITY
Volume 32, Issue 11, Pages 1618-1625

Publisher

NATURE PUBLISHING GROUP
DOI: 10.1038/ijo.2008.167

Keywords

BBS6/MKKS gene; polymorphisms; metabolic syndrome; Greeks

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Objective: To investigate the relationship between MKKS gene variations, obesity-related traits and features of the metabolic syndrome (MS) in the Greek population. Design and subjects: Genotype and haplotype analysis was carried out for six known MKKS gene polymorphisms (534C > T, 985 + 16T > G, 985 + 33C > G, 986-29A > T, 1161 + 58A > G and 1595G > T) in 220 obese subjects (body mass index >= 30 kg/m(2)) and 330 non-obese controls. Results: Genotype frequencies of the 985 + 16T > G, 986-29A > T and 1595G > T SNPs were significantly different between obese and non-obese individuals (P = 0.0016, 0.0196 and 0.0069, respectively). Obese carriers of the risk alleles of the above three polymorphisms had a significantly increased prevalence of arterial hypertension. Furthermore, obese carriers of the G allele for the 985 + 16T > G polymorphism had an increased prevalence of type 2 diabetes mellitus and of MS component traits. A new polymorphism was detected, namely a C to T substitution at position 1129 (1129C > T or N377N). Frequency of the T allele for the 1129C > T polymorphism was significantly higher in control individuals than in obese subjects (P = 0.0253). Haplotype TGTGT was more prevalent in obese than in controls (P = 0.0002) and was associated with increased prevalence of the MS in obese subjects (P < 0.0001). Conclusion: Our results suggest that genetic variation in the MKKS gene may play a role in the development of obesity and the metabolic syndrome.

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