MARCIA SILVA QUEIROZ
Projetos de Pesquisa
Unidades Organizacionais
4 resultados
Resultados de Busca
Agora exibindo 1 - 4 de 4
- Glutathione peroxidase 4 functional variant rs713041 modulates the risk for cardiovascular autonomic neuropathy in individuals with type 1 diabetes(2019) ADMONI, Sharon Nina; SANTOS-BEZERRA, Daniele Pereira; PEREZ, Ricardo Vesoni; PATENTE, Thiago Andrade; MONTEIRO, Maria Beatriz; CAVALEIRO, Ana Mercedes; PARISI, Maria Candida; NETO, Arnaldo Moura; PAVIN, Elizabeth Joao; QUEIROZ, Marcia Silva; NERY, Marcia; CORREA-GIANNELLA, Maria LuciaCardiac autonomic neuropathy is a neglected diabetic chronic complication for which genetic predictors are rarely reported. Oxidative stress is implicated in the pathogenesis of microvascular complications, and glutathione peroxidase 4 is involved in the detoxification of peroxides and of reactive oxygen species. Thus, the association of a functional variant in the gene encoding glutathione peroxidase 4 (rs713041) with this diabetic complication was investigated in 341 individuals with type 1 diabetes evaluated for cardiac autonomic neuropathy status (61.7% women, 34 [27-42] years old; diabetes duration: 21 [15-27] years; HbA1c: 8.3% [7.4-9.4]; as median [interquartile interval]). Cardiac autonomic neuropathy was present in 29% of the participants. There was an inverse association of the minor T allele of rs713041 with cardiac autonomic neuropathy (odds ratio = 0.39; 95% confidence interval = 0.17-0.90; p = 0.0271) after adjustment for potential confounders. The functional glutathione peroxidase 4 variant rs713041 modulated the risk for cardiac autonomic neuropathy in the studied population with type 1 diabetes.
- Allelic variations in genes belonging to glutathione system increase proliferative retinopathy risk in type 1 diabetes individuals(2019) PEREZ, Ricardo Vessoni; MACHADO, Cleide Guimaraes; SANTOS-BEZERRA, Daniele Pereira; ADMONI, Sharon Nina; PATENTE, Thiago Andrade; MONTEIRO, Maria Beatriz; CAVALEIRO, Ana Mercedes; QUEIROZ, Marcia Silva; NERY, Marcia; CORREA-GIANNELLA, Maria LuciaAims: Given the participation of oxidative stress in the pathogenesis of diabetic complications, we evaluated, in type 1 diabetes (T1D) individuals, the association between diabetic retinopathy (DR) and functional single nucleotide polymorphisms (SNPs) in regulatory regions of two genes belonging to the antioxidant glutathione (GSH) system: rs17883901 in GCLC and rs713041 in GPX4. Methods: A cross-sectional case-control study included 288 individuals (61% women, 34[+/- 11] years old, diabetes duration of 22[+/- 9] years, mean [+/- SD]) sorted according to DR stages: absence of DR (ADR), non proliferative DR (NPDR) and proliferative DR (PDR). SNPs were genotyped by real-time PCR using fluorescent labelled probes. Logistic regression models with adjustment for confounding covariates were employed. Results: The presence of at least one T-allele of rs17883901 in GCLC was an independent risk factor for PDR (OR 4.13, 95% CI 1.38-13.66, p = 0.014) in a polytomous regression model (PDR versus ADR). The presence of at least one T-allele of rs713041 in GPX4 conferred protection against PDR (OR 0.30, 95% CI 0.11-0.80, p = 0.017) in female T1D individuals. Conclusion: The functional SNPs rs17883901 and rs713041 modulate the risk for PDR in the studied population of T1D individuals, widening the spectrum of candidate genes for this complication.
- Association of single nucleotide polymorphisms in the gene encoding GLUT1 and diabetic nephropathy in Brazilian patients with type 1 diabetes mellitus(2015) MARQUES, T.; PATENTE, T. A.; MONTEIRO, M. B.; CAVALEIRO, A. M.; QUEIROZ, M. S.; NERY, M.; AZEVEDO, M. J. de; CANANI, L. H.; PARISI, M. C.; MOURA-NETO, A.; PASSARELLI, M.; GIANNELLA-NETO, D.; MACHADO, U. F.; CORREA-GIANNELLA, M. L.Mesangial cells subject to high extracellular glucose concentrations, as occur in hyperglycaemic states, are unable to down regulate glucose influx, resulting in intracellular activation of deleterious biochemical pathways. A high expression of GLUT1 participates in the development of diabetic glomerulopathy. Variants in the gene encoding GLUT1 (SLC2A1) have been associated to this diabetic complication. The aim of this study was to test whether polymorphisms in SLC2A1 confer susceptibility to diabetic nephropathy (DN) in Brazilian type I diabetes patients. Four polymorphisms (rs3820589, rs1385129, rs841847 and rs841848) were genotyped in a Brazilian cohort comprised of 452 patients. A prospective analysis was performed in 155 patients. Mean duration of follow-up was 5.6 +/- 2.4 years and the incidence of renal events was 18.0%. The rs3820589 presented an inverse association with the prevalence of incipient DN (OR: 0.36,95% CI: 0.16 - 0.80, p = 0.01) and with progression to renal events (HR: 0.20; 95% CI: 0.03 - 0.70; p = 0.009). AGGT and AGAC haplotypes were associated with the prevalence of incipient ON and the AGAC haplotype was also associated with the prevalence of established/advanced DN. In conclusion, rs3820589 in the SLC2A1 gene modulates the risk to DN in Brazilian patients with inadequate type I diabetes control.
- Variants inHSD11B1gene modulate susceptibility to diabetes kidney disease and to insulin resistance in type 1 diabetes(2021) MORI, Rosana Cristina; SANTOS-BEZERRA, Daniele Pereira; PELAES, Tatiana Souza; ADMONI, Sharon Nina; PEREZ, Ricardo Vessoni; MONTEIRO, Maria Beatriz; MACHADO, Cleide Guimaraes; QUEIROZ, Marcia Silva; MACHADO, Ubiratan Fabres; CORREA-GIANNELLA, Maria LuciaBackground and aim 11 beta-Hydroxysteroid dehydrogenase 1 has been implicated in insulin resistance (IR) in the setting of metabolic disorders, and single nucleotide polymorphisms (SNPs) in its encoding gene (HSD11B1) have been associated with type 2 diabetes and metabolic syndrome. In type 1 diabetes (T1D), IR has been related to the development of chronic complications. We investigated the association ofHSD11B1SNPs with microvascular complications and with IR in a Brazilian cohort of T1D individuals. Materials and methods Five SNPs were genotyped in 466 T1D individuals (57% women; median of 37 years old, diabetes duration of 25 years and HbA1c of 8.4%). Results The minor allele T of rs11799643 was nominally associated with diabetic retinopathy (OR = 0.52; confidence interval [CI] 95% = 0.28-0.96;P= .036). The minor allele C of rs17389016 was nominally associated with overt diabetic kidney disease (DKD) (OR = 1.90; CI 95% = 1.07-3.37;P= .028). A follow-up study revealed that 29% of the individuals lost >= 5 mL min(-1)x 1.73 m(2)per year of the estimated glomerular filtration rate (eGFR). In these individuals (eGFR decliners), C allele of rs17389016 was more frequent than in non-decliners (OR = 2.10; CI 95% = 1.14-3.89;P= .018). Finally, minor allele T of rs846906 associated with higher prevalence of arterial hypertension, higher body mass index and waist circumference, thus conferring risk to a lower estimated glucose disposal rate, a surrogate marker of insulin sensitivity (OR = 1.23; CI 95% = 1.06-1.42;P= .004). Conclusion SNPs in theHSD11B1gene may confer susceptibility to DKD and to IR in T1D individuals.