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Then C.,Ludwig Maximilians University of Munich | Kowall B.,Heinrich Heine University Dusseldorf | Lechner A.,Ludwig Maximilians University of Munich | Meisinger C.,Helmholtz Center for Environmental Research | And 6 more authors.
Acta Diabetologica | Year: 2015

Elevated plasma CT-pro-vasopressin (copeptin) has been described as biomarkers for type 2 diabetes (T2D) and the metabolic syndrome (MetS), which, however, was not confirmed by all studies. Here, we analyzed the association of copeptin with T2D, MetS and MetS components in the population-based KORA F4 study. Plasma copeptin concentrations were analyzed in 1,554 study participants. We used fractional polynomial selection procedures to check for nonlinearity of the associations between copeptin and T2D and HbA1c, respectively. In logistic regression models, we investigated associations between copeptin and T2D, MetS and its components according to IDF criteria. In the fractional polynomial approach, linear models fitted best for copeptin. In multivariable adjusted models, copeptin as a continuous variable was associated with T2D and HbA1c only in men (OR = 1.38 per standard deviation, 95 % CI 1.13–1.70 for T2D). Comparing the top quartile Q4 versus Q1–3, elevated copeptin was associated with T2D (OR 2.70, 95 % CI 1.60–4.59) in men but not in women (OR 0.98, 95 % CI 0.52–1.83). Copeptin was not significantly associated with MetS, central obesity, triglycerides and reduced HDL cholesterol. A significant association with copeptin was observed for hypertension in women (OR 1.59, 95 % CI 1.08–2.33) and glucose dysfunction according to IDF criteria in men (OR 1.63, 95 % CI 1.14–2.34). In the KORA F4 study, copeptin was significantly associated with T2D only in men, whereas hypertension was associated with copeptin in women. No other components of the MetS were related to elevated copeptin. © 2014, Springer-Verlag Italia. Source

Then C.,Ludwig Maximilians University of Munich | Kowall B.,Heinrich Heine University Dusseldorf | Lechner A.,Ludwig Maximilians University of Munich | Meisinger C.,Helmholtz Center for Environmental Research | And 7 more authors.
Atherosclerosis | Year: 2013

Objective: Subjects with metabolic syndrome (MetS) and individuals with type 2 diabetes are at high risk for vascular complications. Hormones acting on vascular endothelium may be involved in the atherogenic process associated with metabolic disorders. The objective of this study was to determine the correlation of pro-atrial natriuretic hormone (proANP) with the presence of subclinical atherosclerosis. Methods: In 1272 subjects participating in the KORA F4 study, we determined plasma levels of mid-regional proANP (MR-proANP) and the intima-media thickness (IMT) of the carotid artery. We used logistic regression models to investigate the relation of MR-proANP with components of MetS and IMT. Results: In multiple adjusted regression models, MR-proANP levels were inversely associated with MetS (OR=0.66, 95% CI 0.47-0.93), central obesity (OR=0.67, 95% CI 0.46-0.96), raised triglyceride levels (OR=0.53, 95% CI 0.37-0.77), prediabetes (OR=0.62, 95%, CI 0.44-0.87) and type 2 diabetes (OR=0.55, 95% CI 0.35-0.88) when comparing the top quartile vs. the lower three quartiles. Furthermore, there was an inverse relationship between MR-proANP and IMT. After adjustment for traditional cardiovascular risk markers, individuals with high MR-proANP plasma levels in the top quartile (Q4) had significantly lower IMT values (Q4 vs. Q1-Q3: β-0.0178, 95% CI-0.0344;-0.0013). Conclusions: In this population-based study, high plasma concentrations of MR-proANP were significantly associated with a lower incidence of MetS components and lower measures of early atherosclerosis. The data suggest a link between MR-proANP levels and the development of vascular complications. © 2013 Elsevier Ireland Ltd. Source

Then C.,Ludwig Maximilians University of Munich | Kowall B.,Heinrich Heine University Dusseldorf | Lechner A.,Ludwig Maximilians University of Munich | Meisinger C.,Helmholtz Center for Environmental Research | And 7 more authors.
Cardiovascular Diabetology | Year: 2013

Background: Elevated plasma preprovasopressin (copeptin) levels are associated with cardiovascular complications as well as with an increased risk for type 2 diabetes (T2D). Here, we studied, whether plasma copeptin is related to carotid intima-media thickness (IMT), a measure of early atherosclerosis, and may thus be one explanation for the high cardiovascular risk in T2D.Methods: Plasma concentrations of copeptin and IMT of the common carotid artery were determined in 1275 participants of the population-based KORA F4 study. We used linear regression models to investigate associations between copeptin levels and IMT.Results: In the whole study group, copeptin levels were not significantly associated with IMT after adjustment for age and sex. Copeptin and IMT were significantly inversely associated after multivariable adjustment in the total cohort (β = -0.020 mm, 95% CI: -0.037 mm; -0.003 mm), in men (β = -0.035 mm, 95% CI: -0.061 mm; -0.009 mm) and in study participants with prediabetes (β = -0.041 mm, 95% CI: -0.078 mm; -0.005 mm) comparing quartile 4 vs quartile 1. The negative association of copeptin and IMT in men was present after adjustment for age alone. In women and patients with T2D, copeptin was not significantly associated with IMT.Conclusions: Plasma copeptin was not associated with an increased IMT in our study cohort. In contrast, copeptin levels were related to a lower IMT in men and subjects with prediabetes, suggesting that elevated copeptin concentrations do not exert proatherogenic effects on carotid arteries. © 2013 Then et al.; licensee BioMed Central Ltd. Source

Schwab S.,Institute of Epidemiology II | Zierer A.,Institute of Epidemiology II | Schneider A.,Institute of Epidemiology II | Heier M.,Institute of Epidemiology II | And 7 more authors.
British Journal of Nutrition | Year: 2015

The aim of the present study was to examine the association between intake of five common antioxidative nutrients from supplements and medications (vitamin E, vitamin C, carotenoids, Se, and Zn) and levels of high-sensitivity C-reactive protein (hs-CRP) in the general population. For this purpose, a total of 2924 participants of the population-based Cooperative Health Research in the Region of Augsburg (KORA) F4 study (2006-8) were investigated cross-sectionally. Intake of dietary supplements and medication during the last 7 d was recorded in a personal interview, when participants were asked to show product packages of ingested preparations. Linear regression models were calculated; first, the exposure to regular nutrient intake was treated with a binary response (yes/no); then regularly ingested amounts were divided into quartiles to examine dose-response relationships. Effect of single v. combined supplementation of antioxidants was assessed through the inclusion of interaction terms into the models. Regular intake of any of the five investigated antioxidants per se was not associated with hs-CRP levels. However, dose-response analyses revealed that participants who regularly ingested more than 78 mg vitamin E/d, which corresponds to the upper quartile, had 22 % lower hs-CRP levels (95 % CI 0·63, 0·97) compared to those of persons who were not exposed to any vitamin E supplementation. Stratified analyses showed that this association was found only in persons who took vitamin E in combination with other antioxidants. The combined supplementation of vitamin E with other antioxidants could thus be a promising strategy for the prevention of inflammation-related diseases in the general population, if further studies could confirm that the proposed association is causal. © 2015 The Authors. Source

Petersen A.-K.,Institute of Genetic Epidemiology | Zeilinger S.,Research Unit of Molecular Epidemiology | Kastenmuller G.,Institute of Bioinformatics and Systems Biology | Werner R.-M.,Institute of Bioinformatics and Systems Biology | And 20 more authors.
Human Molecular Genetics | Year: 2014

Previously,we reported strong influences of genetic variants on metabolic phenotypes, some of them with clinical relevance. Here, we hypothesize that DNA methylation may have an important and potentially independent effect on human metabolism. Totest this hypothesis,we conducted what is to the best of our knowledge the first epigenome-wide association study (EWAS) between DNA methylation and metabolic traits (metabotypes) in human blood. We assess 649 blood metabolic traits from 1814 participants of the Kooperative Gesundheitsforschung in der Region Augsburg (KORA) population study for association with methylation of 457 004 CpG sites, determined on the Infinium Human Methylation 450 Bead Chip platform. Using the EWAS approach, we identified two types of methylome-metabotype associations. One type is driven by an underlying genetic effect; the other type is independent of genetic variation and potentially driven by common environmental and life-style-dependent factors. We report eight CpG loci atgenome-wide significance that have a genetic variant as confounder (P = 3.9 × 10-20 to 2.0 × 10-108, r2 = 0.036 to 0.221).Seven loci display CpG site-specific associations to metabotypes ,but do not exhibit any underlying genetic signals (P = 9.2 × 10-14 to 2.7 × 10-27, r2 = 0.008 to 0.107). We further identify several groups of CpG loci that associate with a same metabotype, such as 4-vinylphenol sulfate and 4-androsten-3-beta,17-beta-diol disulfate. In these cases, the association between CpG-methylation and metabotype is likely the result of a common external environmental factor, including smoking. Our study shows that analysis of EWAS with large numbers of metabolic traits in large population cohorts are, in principle, feasible. Taken together, our data suggest that DNA methylation plays an important role in regulating human metabolism. © The Author 2013. Published by Oxford University Press. Source

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