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Sökning: L773:0021 972X OR L773:1945 7197 > Karlsson Magnus K.

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1.
  • Carlzon, Daniel, et al. (författare)
  • Both Low and High Serum Insulin-like Growth Factor-I Levels Associate with Increased Risk of Cardiovascular Events in Elderly Men.
  • 2014
  • Ingår i: The Journal of clinical endocrinology and metabolism. - : The Endocrine Society. - 1945-7197 .- 0021-972X. ; 99:11
  • Tidskriftsartikel (refereegranskat)abstract
    • Aims: Most previous prospective studies suggest that low serum insulin-like growth factor-I (IGF-I) associates with increased risk of cardiovascular disease (CVD) events while other studies suggest that high serum IGF-I associates with increased risk of CVD events. We tested the hypothesis that not only low, but also high, serum IGF-I associate with increased risk of CVD events in elderly men. Methods and Results: Serum IGF-I levels were measured in 2901 elderly men (aged 69 to 81 years) included in the prospective population-based MrOS-Sweden cohort. Data for CVD events were obtained from national Swedish registers with no loss of follow-up. During follow-up (median 5.1 yrs) 589 of the participants experienced a CVD event. The association between serum IGF-I and risk of CVD events was nonlinear, and restricted cubic spline Cox regression analysis revealed a U-shaped association between serum IGF-I levels and CVD events (p<0.01 for nonlinearity). Low as well as high serum IGF-I (quintile 1 or 5 vs. quintiles 2-4) significantly associated with increased risk for CVD events (hazard ratio (HR) = 1.25, 95% confidence interval (CI) 1.02-1.54; and HR = 1.35, 95% CI 1.10-1.66, respectively). These associations remained after adjustment for prevalent CVD and multiple risk factors. High serum IGF-I associated with increased risk of coronary heart disease (CHD) events but not with risk of cerebrovascular events. Conclusion: Both low and high serum IGF-I levels are risk markers for CVD events in elderly men. The association between high serum IGF-I and CVD events is mainly driven by CHD events.
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2.
  • Eriksson, Anna-Lena, 1971, et al. (författare)
  • Genetic Determinants of Circulating Estrogen Levels and Evidence of a Causal Effect of Estradiol on Bone Density in Men.
  • 2018
  • Ingår i: Journal of Clinical Endocrinology and Metabolism. - : The Endocrine Society. - 0021-972X .- 1945-7197. ; 103:3, s. 991-1004
  • Tidskriftsartikel (refereegranskat)abstract
    • Serum estradiol (E2) and estrone (E1) levels exhibit substantial heritability.To investigate the genetic regulation of serum E2 and E1 in men.Genome-wide association study in 11,097 men of European origin from nine epidemiological cohorts.Genetic determinants of serum E2 and E1 levels.Variants in/near CYP19A1 demonstrated the strongest evidence for association with E2, resolving to three independent signals. Two additional independent signals were found on the X chromosome; FAMily with sequence similarity 9, member B (FAM9B), rs5934505 (P = 3.4 × 10-8) and Xq27.3, rs5951794 (P = 3.1 × 10-10). E1 signals were found in CYP19A1 (rs2899472, P = 5.5 × 10-23), in Tripartite motif containing 4 (TRIM4; rs17277546, P = 5.8 × 10-14), and CYP11B1/B2 (rs10093796, P = 1.2 × 10-8). E2 signals in CYP19A1 and FAM9B were associated with bone mineral density (BMD). Mendelian randomization analysis suggested a causal effect of serum E2 on BMD in men. A 1 pg/mL genetically increased E2 was associated with a 0.048 standard deviation increase in lumbar spine BMD (P = 2.8 × 10-12). In men and women combined, CYP19A1 alleles associated with higher E2 levels were associated with lower degrees of insulin resistance.Our findings confirm that CYP19A1 is an important genetic regulator of E2 and E1 levels and strengthen the causal importance of E2 for bone health in men. We also report two independent loci on the X-chromosome for E2, and one locus each in TRIM4 and CYP11B1/B2, for E1.
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3.
  • Eriksson, Anna L, et al. (författare)
  • Serum Glycine Levels Are Associated With Cortical Bone Properties and Fracture Risk in Men.
  • 2021
  • Ingår i: The Journal of clinical endocrinology and metabolism. - : The Endocrine Society. - 1945-7197 .- 0021-972X. ; 106:12, s. e5021-e5029
  • Tidskriftsartikel (refereegranskat)abstract
    • In a recent study a pattern of 27 metabolites, including serum glycine, associated with bone mineral density (BMD).To investigate associations for serum and urinary glycine levels with BMD, bone microstructure, and fracture risk in men.In the population-based Osteoporotic Fractures in Men (MrOS) Sweden study (men, 69-81 years) serum glycine and BMD were measured at baseline (n = 965) and 5-year follow-up (n = 546). Cortical and trabecular bone parameters of the distal tibia were measured at follow-up using high-resolution peripheral quantitative computed tomography. Urinary (n = 2682) glycine was analyzed at baseline. X-ray-validated fractures (n = 594) were ascertained during a median follow-up of 9.6 years. Associations were evaluated using linear regression (bone parameters) or Cox regression (fractures).Circulating glycine levels were inversely associated with femoral neck (FN)-BMD. A meta-analysis (n = 7543) combining MrOS Sweden data with data from 3 other cohorts confirmed a robust inverse association between serum glycine levels and FN-BMD (P = 7.7 × 10-9). Serum glycine was inversely associated with the bone strength parameter failure load in the distal tibia (P = 0.002), mainly as a consequence of an inverse association with cortical cross-sectional area and a direct association with cortical porosity. Both serum and urinary glycine levels predicted major osteoporotic fractures (serum: hazard ratio [HR] per SD increase = 1.22, 95% CI, 1.05-1.43; urine: HR = 1.13, 95% CI, 1.02-1.24). These fracture associations were only marginally reduced in models adjusted by FRAX with BMD.Serum and urinary glycine are indirectly associated with FN-BMD and cortical bone strength, and directly associated with fracture risk in men.
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