Dataset Information

TGFB1 and LAMA1 gene polymorphisms in children with high myopia.

ABSTRACT: Objective:To investigate TGFB1 and LAMA1 gene polymorphisms in children with high myopia in order to determine the genetic basis of large myopic shifts causing severe visual impairment and complications. Methods:Seventy-four children with high myopia (?6 diopters [D]; study group) and 77 emmetropic children (±0.5D; control group) were included. Genetic and polymorphism analyses were performed in the Medical Genetics Laboratory using DNA purified from the patients' blood samples. Results:Mean ages of the patients were 7.1±3 (3-13) and 9.6±1.8 (6-13) years in the study and control groups, respectively. Mean refraction in the high myopia group were -10.1±4.3D in the right and -8.9±3.6D in the left eye. LAMA1 gene analysis of the study group revealed heterozygous mutations in 34 patients (45.9%), homozygous mutations in 25 patients (33.8%), and no mutations in the remaining 15 patients (20.3%). In the control group, there were 31 subjects (40.3%) with heterozygous, 27 (35.1%) with homozygous LAMA1 mutations, and no mutations in 19 (24.7%) (p=0.73). TGFB1 gene analysis showed heterozygous mutations in 32 (43.2%) and homozygous mutations in 10 patients (13.5%) in the study group, while 32 patients (43.2%) had no mutations. In the control group, 35 subjects (45.5%) had heterozygous, 8 (10.4%) had homozygous, and 34 (44.1%) had no TGFB1 mutations (p=0.36). Conclusion:This is the first study to simultaneously examine two genes in high myopia in a Turkish population. However, we observed no significant differences in TGFB1 and LAMA1 gene polymorphisms in patients with high myopia compared to healthy subjects.

SUBMITTER: Biler ED

PROVIDER: S-EPMC5954398 | biostudies-literature | 2018 Mar-Apr

REPOSITORIES: biostudies-literature

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<i>TGFB1</i> and <i>LAMA1 gene</i> polymorphisms in children with high myopia.

Biler Elif Demirkilinc ED Ilim Orhan O Palamar Melis M Onay Huseyin H Uretmen Onder O

Pakistan journal of medical sciences 20180301 2

<h4>Objective</h4>To investigate <i>TGFB1</i> and <i>LAMA1</i> gene polymorphisms in children with high myopia in order to determine the genetic basis of large myopic shifts causing severe visual impairment and complications.<h4>Methods</h4>Seventy-four children with high myopia (≥6 diopters [D]; study group) and 77 emmetropic children (±0.5D; control group) were included. Genetic and polymorphism analyses were performed in the Medical Genetics Laboratory using DNA purified from the patients' bl ...[more]

PMID: 29805427

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Project description:PURPOSE: Recent work has suggested that insulin-like growth factor 1 (IGF-1) gene polymorphisms are genetically linked with high-grade myopia (HM), which is a complex-trait eye disorder in which numerous candidate loci and genes are thought to play a role. We investigated whether the IGF-1 single nucleotide polymorphisms (SNPs) rs6214, rs10860860, and rs2946834 are associated with HM (?-6.0 diopters [D]) and any myopia (?-0.5 D) phenotype in Polish families. METHODS: Forty-two multiplex HM Polish families, of whom 127 had HM, participated in the study. All of the family members (n=306) underwent a detailed ophthalmic examination, including axial length measurements. The IGF-1 SNPs rs6214, rs10860860, and rs2946834 were evaluated by PCR-RFLP and direct sequencing methods. Both Family-Based Association Test (FBAT) and family-based Pedigree Disequilibrium Test (PDT) were used to examine the potential association of the IGF-1 SNPs rs6214, rs10860860, and rs2946834 with HM or any myopia. To determine the distribution of the HM-associated SNPs rs6214 and rs10860860, 543 unrelated individuals from the general Polish population were also analyzed. RESULTS: We found no significant association between the IGF-1 SNPs rs6214, rs10860860, and rs2946834 and HM or any myopia phenotype in Polish HM families. In the general Polish population, the minor allele frequencies of the SNPs rs6214 and rs10860860 did not deviate significantly from the distribution reported for European populations (p=0.629). In the FBAT analysis under the dominant model, the haplotype consisted of T allele of rs10860860, with C allele of rs2946834 of IGF-1 was found less frequently transmitted to HM individuals (p=0.0065), pointing to a nonassociated or protective haplotype. CONCLUSIONS: Our results do not support recent studies reporting an association of the SNPs rs6214, rs10860860, and rs2946834 in the IGF-1 gene with HM and any myopia phenotypes. Further replication studies involving other populations are needed to investigate the possible role of IGF-1 as a potential myopia candidate gene.

Dataset Information

TGFB1 and LAMA1 gene polymorphisms in children with high myopia.

Publications

<i>TGFB1</i> and <i>LAMA1 gene</i> polymorphisms in children with high myopia.

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