Polymorphisms in Turkish population » syndrome

Genetic polymorphisms of FSHR, CYP17, CYP1A1, CAPN10, INSR, SERPINE1 genes in adolescent girls with polycystic ovary syndrome.

admin — Wed, 29 Apr 2009 19:39:16 +0000

J Assist Reprod Genet. 2009 Apr 22.

Unsal T, Konac E, Yesilkaya E, Yilmaz A, Bideci A, Ilke Onen H, Cinaz P, Menevse A.

Department of Medical Biology and Genetics, Faculty of Medicine, Gazi University, Besevler, 6500, Ankara, Turkey.

BACKGROUND: Polycystic ovary syndrome (PCOS), whose genetic basis is not completely well understood, is the most common endocrine disorder in women and it typically develops during adolescence. The aim of this study is to investigate the possible association between single nucleotide polymorphisms (SNPs) of FSHR, CYP17, CYP1A1, CAPN10, INSR, SERPINE1 genes and PCOS in adolescent girls. METHODS: DNA samples from forty-four adolescent girls with PCOS and 50 healthy controls were analyzed by PCR-RFLP and direct DNA sequencing to determine the genotypic frequency of 17 different polymorphic loci on the FSHR (A307T, N680S), CYP17 (-34 T/C), CYP1A1 (T6235C), CAPN10 (44, 43, 19, 63), INSR (exon 17 C/T), SERPINE1 (4G/5G) genes. Genotyping of exon 12 (six polymorphisms) and intron 12 (one polymorphism) of INSR gene by direct DNA sequencing was performed for the first time in this study. RESULTS: No significant differences were observed in the genotype and allele distributions of above mentioned polymorphisms between cases and control groups. CONCLUSION: Our data does not support an association between SNPs of FSHR, CYP17, CYP1A1, CAPN10, INSR, SERPINE1 genes and susceptibility to PCOS or related traits in Turkish adolescent girls.

Nitric oxide synthase gene polymorphisms in children with minimal change nephrotic syndrome.

admin — Wed, 29 Apr 2009 19:31:31 +0000

Pediatr Int. 2009 Feb;51(1):75-8.

Alasehirli B, Balat A, Barlas O, Kont A.

Department of Pharmacology, Medical Faculty, Gaziantep University, Gaziantep, Turkey.

AIMS: Nitric oxide (NO) attenuates many functions within the kidney, and all NO synthase (NOS) isoforms are constitutively expressed in the kidney. But the exact role of NO in renal diseases is still debatable. The aim of the present study was to investigate endothelial (eNOS), and neuronal (nNOS) NOS gene polymorphisms in children with minimal change nephrotic syndrome (MCNS). MATERIALS AND METHODS: Eighty-six Turkish children with clinical MCNS, ranging in age from 2 to 10 years, were compared with 114 healthy age- and sex-matched controls. The glu 298 Asp (G/T) polymorphism of the eNOS, and C276T (C/T) polymorphism of nNOS genes were genotyped using polymerase chain reaction. RESULTS: The distribution of GG, TG, and TT genotypes for eNOS was 52%, 33% and 15% in MCNS compared with 61%, 26% and 13% in the controls (P > 0.05). The distribution of CC, TC, and TT genotypes for nNOS was 16%, 66% and 18% in MCNS compared with 10%, 43% and 47% in the controls. TT genotype distribution of nNOS was found to be lower in patients (P = 0.003). The eNOS and nNOS gene polymorphisms were not associated with gender, positive family history, frequency of relapses, or response to steroid. CONCLUSIONS: The present study is the first to investigate eNOS and nNOS gene polymorphisms in children with MCNS. The nNOS gene polymorphism may be associated with MCNS in children, but further studies in a larger population with different glomerular diseases are needed to confirm the results.

Evidence of linkage disequilibrium between polymorphisms at the IRF6 locus and isolate tooth agenesis, in a Turkish population.

admin — Fri, 05 Sep 2008 12:24:59 +0000

Arch Oral Biol. 2008 Aug;53(8):780-4. Epub 2008 May 1.

Vieira AR, Seymen F, Patir A, Menezes R.

Department of Oral Biology and Center for Craniofacial and Dental Genetics, School of Dental Medicine, University of Pittsburgh, Pittsbergh, PA 15261, USA. arv11@dental.pitt.edu

Recently, the IRF6 contribution that was reported for Van der Woude syndrome and non-syndromic oral clefts was extended to isolated tooth agenesis. Here we report the first study that tries to replicate this finding and we provide further evidence that IRF6 contributes to isolated tooth agenesis. Fifty-two sporadic tooth agenesis cases and their parents were studied. DNA samples were obtained from whole blood or saliva samples. Genotyping was performed by TaqMan assays. Linkage disequilibrium analysis and transmission distortion of the marker alleles were performed. A haplotype involving the most 5′IRF6 markers was associated with sporadic tooth agenesis (p=0.006). An association could still be seen when only cases with at least one missing incisor (p=0.01) and cases with at least one missing premolar (p=0.004) were included in the analysis.