title: Effect of three common SNPs in 5'-flanking region of LEP and ADIPOQ genes on their expression in Polish obese children and adolescents.
abstract: Genes encoding adipokines are considered as candidates for human obesity. In this study we analyzed the expression of leptin (LEP) and adiponectin (ADIPOQ) genes in relation to common 5'-flanking or 5'UTR variants: -2548G>A (LEP), 19A>G (LEP) and -11377C>G (ADIPOQ) in Polish obese children and adolescents. Relative transcription levels in the subcutaneous adipose tissue (real time RT-PCR) and serum protein concentrations (RIA) were measured in 48 obese subjects with known genotypes at three polymorphic sites and in five non-obese controls. None of the studied polymorphisms altered significantly the expression. Significantly elevated relative transcription levels of the LEP gene (P < 0.05) and serum leptin concentrations (P < 0.01) were recorded in obese patients, when compared with the non-obese controls, but such differences were not found for the ADIPOQ gene. Interestingly, the leptin to adiponectin protein concentration ratio (L/A) was approximately sevenfold higher in obese children and adolescents when compared with the non-obese controls (P < 0.001). Taking into consideration the observed relationship between the genotypes and the gene expression level we suggest that these SNPs are not conclusive markers for predisposition to obesity in Polish children and adolescents. On the other hand, we confirmed that the leptin to adiponectin gene expression ratio (L/A) is an informative index characterizing obesity.
authors.affiliation: Department of Genetics and Animal Breeding, Poznan University of Life Sciences, Wolynska 33, 60-637, Poznan, Poland.
authors.forename: J
authors.initials: J
authors.lastname: Cieslak
authors.forename: M
authors.initials: M
authors.lastname: Bartz
authors.forename: M
authors.initials: M
authors.lastname: Stachowiak
authors.forename: B
authors.initials: B
authors.lastname: Skowronska
authors.forename: K A
authors.initials: KA
authors.lastname: Majewska
authors.forename: J
authors.initials: J
authors.lastname: Harasymczuk
authors.forename: W
authors.initials: W
authors.lastname: Stankiewicz
authors.forename: P
authors.initials: P
authors.lastname: Fichna
authors.forename: M
authors.initials: M
authors.lastname: Switonski
mesh_terms: D024506:5' Flanking Region / Q000235:genetics*; D052242:Adiponectin / Q000097:blood / Q000235:genetics*; D000293:Adolescent; D016022:Case-Control Studies; D002648:Child; D005260:Female; D005786:Gene Expression Regulation; D005799:Genes, Dominant / Q000235:genetics; D005808:Genes, Recessive / Q000235:genetics; D020022:Genetic Predisposition to Disease; D006801:Humans; D020738:Leptin / Q000097:blood / Q000235:genetics*; D008297:Male; D008957:Models, Genetic; D009765:Obesity / Q000097:blood / Q000235:genetics*; D011044:Poland; D020641:Polymorphism, Single Nucleotide / Q000235:genetics*; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism
chemical_list: C499918:ADIPOQ protein, human; D052242:Adiponectin; D020738:Leptin; D012333:RNA, Messenger