Influência de polimorfismos em genes da rota da vitamina D em parâmetros antropométricos e bioquímicos
Carregando...
Arquivos
Data
2016-08
Autores
Orientador
Contini, Verônica
Banca
Título do periódico
ISSN
Título do Volume
Editor
Resumo
Introdução: Muitos estudos tem relacionado a deficiência de vitamina D com o risco para as doenças crônicas, principalmente obesidade e dislipidemia. A vitamina D age através da ligação ao receptor de vitamina D (VDR), o qual forma heterodímeros com o receptor do retinoide X gama (RXRG). O gene GC codifica a proteína de ligação da vitamina D (DBP), a qual é responsável pelo transporte da vitamina D na corrente sanguínea. Considerando que a genética desempenha um papel importante na etiologia destas doenças, poucos estudos analisam a associação de variantes em genes da rota da vitamina D com parâmetros antropométricos e bioquímicos relacionados a estes desfechos. Objetivo: Investigar a associação entre polimorfismos de genes relacionados à rota da vitamina D, rs2228570 (gene VDR), rs2134095 (gene RXRG), rs7041 (gene GC), e parâmetros antropométricos e bioquímicos em uma amostra de adultos. Métodos: Medidas antropométricas e bioquímicas foram avaliadas em 542 indivíduos adultos de ambos os gêneros em uma amostra de base populacional. O DNA genômico foi extraído a partir de amostra de sangue e os polimorfismos foram genotipados pela reação em cadeia da polimerase (PCR) através de discriminação alélica TaqMan (Applied Biosystems, Foster City, CA). As comparações dos desfechos entre os genótipos foram feitas usando ANOVA, Kruskal-Wallis, qui-quadrado de Pearson ou teste exato de Fisher, e as interações gene-gene foram avaliadas usando modelo linear geral. Resultados: Não identificamos nenhum efeito principal dos polimorfismos nos parâmetros avaliados. No entanto, ao analisarmos as interações gene-gene, detectamos uma interação significativa entre os genes RXRG e GC sobre os níveis de colesterol LDL. Conclusões: Nossos achados evidenciaram uma interação significativa entre polimorfismos de dois genes da rota da vitamina D, rs2134095 (RXRG) e rs7041 (GC) sobre os níveis de colesterol LDL, corroborando os achados da literatura que tem consistentemente relacionado a vitamina D com o perfil lipídico.
Introduction: Many studies have related vitamin D deficiency with the risk for chronic diseases, especially obesity and dyslipidemia. Vitamin D acts by binding to the vitamin D receptor (VDR), which form heterodimers with the retinoid X receptor gamma (RXRG). The GC gene encoding the binding protein Vitamin D (BPD), which is responsible for the vitamin D transport in the bloodstream. Considering that genetics play a significant role in the etiology of these diseases, few studies have analyzed the association of variants in genes of vitamin D route anthropometric and biochemical parameters related to these outcomes. Objective: To investigate the association between gene polymorphisms related to vitamin D route, rs2228570 (VDR gene), rs2134095 (RXRG gene), rs7041 (GC gene), and anthropometric and biochemical parameters in a sample of adults. Methods: anthropometric and biochemical measures were assessed in 542 adults of both genders in a population-based sample. Genomic DNA was extracted from blood sample and polymorphisms were genotyped by polymerase chain reaction (PCR) using the TaqMan allelic discrimination (Applied Biosystems, Foster City, CA). Comparisons of outcomes between genotypes were performed using ANOVA, Kruskal-Wallis test, chi-square test or Fisher's exact test, and gene-gene interactions were assessed using general linear model. Results: We have not identified any major effect of polymorphisms in the evaluated parameters. However, when we analyze the gene-gene interactions, we detected a significant interaction between RXRG and GC genes on LDL cholesterol levels. Conclusions: Our findings showed a significant interaction between polymorphisms in two genes of vitamin D route, rs2134095 (RXRG) and rs7041 (GC) on the levels of LDL cholesterol, corroborating literature findings that have consistently related to vitamin D with the profile lipid.
Introduction: Many studies have related vitamin D deficiency with the risk for chronic diseases, especially obesity and dyslipidemia. Vitamin D acts by binding to the vitamin D receptor (VDR), which form heterodimers with the retinoid X receptor gamma (RXRG). The GC gene encoding the binding protein Vitamin D (BPD), which is responsible for the vitamin D transport in the bloodstream. Considering that genetics play a significant role in the etiology of these diseases, few studies have analyzed the association of variants in genes of vitamin D route anthropometric and biochemical parameters related to these outcomes. Objective: To investigate the association between gene polymorphisms related to vitamin D route, rs2228570 (VDR gene), rs2134095 (RXRG gene), rs7041 (GC gene), and anthropometric and biochemical parameters in a sample of adults. Methods: anthropometric and biochemical measures were assessed in 542 adults of both genders in a population-based sample. Genomic DNA was extracted from blood sample and polymorphisms were genotyped by polymerase chain reaction (PCR) using the TaqMan allelic discrimination (Applied Biosystems, Foster City, CA). Comparisons of outcomes between genotypes were performed using ANOVA, Kruskal-Wallis test, chi-square test or Fisher's exact test, and gene-gene interactions were assessed using general linear model. Results: We have not identified any major effect of polymorphisms in the evaluated parameters. However, when we analyze the gene-gene interactions, we detected a significant interaction between RXRG and GC genes on LDL cholesterol levels. Conclusions: Our findings showed a significant interaction between polymorphisms in two genes of vitamin D route, rs2134095 (RXRG) and rs7041 (GC) on the levels of LDL cholesterol, corroborating literature findings that have consistently related to vitamin D with the profile lipid.
Descrição
Palavras-chave
25(OH)D; VDR; GC; RXRG; Perfil lipídico; Parâmetros antropométricos; Parâmetros bioquímicos
Citação
GRAVE, Nathália. Influência de polimorfismos em genes da rota da vitamina D em parâmetros antropométricos e bioquímicos. 2015. Dissertação (Mestrado) – Curso de Biotecnologia, Universidade do Vale do Taquari - Univates, Lajeado, 17 dez. 2015. Disponível em: http://hdl.handle.net/10737/1079.