title: Polymorphisms in 5'-flanking regions of genes encoding adiponectin, leptin, and resistin are not associated with obesity of Polish children and adolescents.
abstract: Genes encoding adipokines are important functional candidates for development of obesity. In this study we screened for polymorphism 5'-flanking regions of the adiponectin (ADIPOQ), leptin (LEP) and resistin (RETN) genes in a cohort of Polish obese children and adolescents (n = 243) and a control group of non-obese adults (n = 100). Altogether 13 SNPs (single nucleotide polymorphisms) and 1 InDel (insertion/deletion polymorphism) were found. Among them five polymorphisms, localized in the LEP gene, turned out to be novel, but their distribution was insufficient for association studies. We found no consistent evidence for association between obesity and the SNPs demonstrating minor allele frequency (MAF) above 0.2 (ADIPOQ: -11377C>G, LEP: -2548C>T, 19A>G, RETN: -1300G>A, -1258C>T, -420C>G). Comparison of polymorphisms distribution in patients and control group suggested association with ADIPOQ -11377C>G (Pearson test P = 2.76 × 10(-11)), however, we did not observe any effect of this polymorphism on BMI or relative BMI (RBMI) within obese patients (P = 0.41). We conclude that the tested SNPs are not useful markers of childhood and adolescence obesity in Polish population.
authors.affiliation: Department of Genetics and Animal Breeding, Poznan University of Life Sciences, Wolynska 33, 60-637 Poznan, Poland.
authors.forename: Jakub
authors.initials: J
authors.lastname: Cieslak
authors.forename: Anna
authors.initials: A
authors.lastname: Skorczyk
authors.forename: Monika
authors.initials: M
authors.lastname: Stachowiak
authors.forename: Maciej
authors.initials: M
authors.lastname: Szydlowski
authors.forename: Maria
authors.initials: M
authors.lastname: Grzes
authors.forename: Paulina
authors.initials: P
authors.lastname: Paczynska
authors.forename: Bogda
authors.initials: B
authors.lastname: Skowronska
authors.forename: Katarzyna
authors.initials: K
authors.lastname: Majewska
authors.forename: Witold
authors.initials: W
authors.lastname: Stankiewicz
authors.forename: Piotr
authors.initials: P
authors.lastname: Fichna
authors.forename: Marek
authors.initials: M
authors.lastname: Switonski
mesh_terms: D024506:5' Flanking Region / Q000235:genetics*; D052242:Adiponectin / Q000235:genetics*; D000293:Adolescent; D000328:Adult; D001665:Binding Sites; D016022:Case-Control Studies; D002648:Child; D005260:Female; D056726:Genetic Association Studies; D020022:Genetic Predisposition to Disease; D006801:Humans; D020738:Leptin / Q000235:genetics*; D008297:Male; D008875:Middle Aged; D009765:Obesity / Q000235:genetics*; D011044:Poland; D020641:Polymorphism, Single Nucleotide / Q000235:genetics*; D011401:Promoter Regions, Genetic / Q000235:genetics; D052243:Resistin / Q000235:genetics*; D014157:Transcription Factors / Q000378:metabolism
chemical_list: D052242:Adiponectin; D020738:Leptin; D052243:Resistin; D014157:Transcription Factors