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Sökning: WFRF:(Dobnig Harald)

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1.
  • Langdahl, Bente L, et al. (författare)
  • Large-scale analysis of association between polymorphisms in the transforming growth factor beta 1 gene (TGFB1) and osteoporosis : the GENOMOS study
  • Ingår i: Bone. - : Elsevier. - 8756-3282. ; 42:5, s. 81-969
  • Tidskriftsartikel (refereegranskat)abstract
    • INTRODUCTION: The TGFB1 gene which encodes transforming growth factor beta 1, is a strong candidate for susceptibility to osteoporosis and several studies have reported associations between bone mineral density (BMD), osteoporotic fractures and polymorphisms of TGFB1, although these studies have yielded conflicting results.METHODS: We investigated associations between TGFB1 polymorphisms and BMD and fracture in the GENOMOS study: a prospective multicenter study involving 10 European research studies including a total of 28,924 participants. Genotyping was conducted for known TGFB1 polymorphisms at the following sites: G-1639-A (G-800-A, rs1800468), C-1348-T (C-509-T, rs1800469), T29-C (Leu10Pro, rs1982073), G74-C (Arg25Pro, rs1800471) and C788-T (Thr263Ile, rs1800472). These polymorphisms were genotyped prospectively and methodology was standardized across research centers. Genotypes and haplotypes were related to BMD at the lumbar sine and femoral neck and fractures.RESULTS: There were no significant differences in either women or men at either skeletal site for any of the examined polymorphisms with the possible exception of a weak association with reduced BMD (-12 mg/cm2) in men with the T-1348 allele (p<0.05). None of the haplotypes was associated with BMD and none of the polymorphisms or haplotypes significantly affected overall risk of fractures, however, the odds ratio for incident vertebral fracture in carriers of the rare T788 allele was 1.64 (95% CI: 1.09-2.64), p<0.05.CONCLUSIONS: This study indicates that polymorphic variation in the TGFB1 gene does not play a major role in regulating BMD or susceptibility to fractures. The weak associations we observed between the C-1348-T and lumbar spine BMD in men and between C788-T and risk of incident vertebral fractures are of interest but could be chance findings and will need replication in future studies.
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2.
  • Svensson, My, et al. (författare)
  • Osteoprotegerin as a predictor of renal and cardiovascular outcomes in renal transplant recipients : follow-up data from the ALERT study
  • 2012
  • Ingår i: Nephrology, Dialysis and Transplantation. - 0931-0509 .- 1460-2385. ; 27:6, s. 2571-2575
  • Tidskriftsartikel (refereegranskat)abstract
    • Background. In patients with chronic kidney disease, vascular calcification contributes to increased cardiovascular (CV) morbidity and mortality. CV risk remains high after successful renal transplantation. Osteoprotegerin (OPG) is a glycoprotein, involved in the regulation of the vascular calcification process. Previous studies have shown that elevated OPG is predictive of mortality in high-risk populations. The aim of this study was to investigate the prognostic value of OPG for graft function, CV events and all-cause death, in a large transplant cohort.Methods. OPG was measured at baseline in renal transplant recipients enrolled in the Assessment of Lescol in Renal Transplantation (ALERT) study, a randomized placebo-controlled intervention study comparing fluvastatin and placebo. Patients were followed for 6.7 years with evaluation of pre-specified end points, graft loss, graft function, CV events and death.Results. OPG was analysed in 1889 renal transplant recipients, with a mean value of 4.69 +/- 1.85 pg/L. The number of renal and CV events increased by quartiles of OPG. In the multivariate analysis, OPG in the fourth as compared to first quartile was an independent predictor of graft failure or doubling of serum creatinine [hazard ratio (HR) 2.20 (1.56-3.11), P < 0.001], major CV events [HR 2.40 (1.58-3.64), P < 0.001], cardiac mortality [HR 2.80 (1.32-5.94), P = 0.007] and all-cause mortality [HR 2.31 (1.53-3.49), P < 0.001].Conclusion. In a large cohort of kidney transplant patients with long-term follow-up, OPG was independently associated with renal events, CV events and mortality.
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3.
  • Uitterlinden, André G, et al. (författare)
  • The association between common vitamin D receptor gene variations and osteoporosis : a participant-level meta-analysis
  • Ingår i: Annals of Internal Medicine. - : American College of Physicians. - 0003-4819. ; 145:4, s. 255-264
  • Tidskriftsartikel (refereegranskat)abstract
    • BACKGROUND: Polymorphisms of the vitamin D receptor (VDR) gene have been implicated in the genetic regulation of bone mineral density (BMD). However, the clinical impact of these variants remains unclear.OBJECTIVE: To evaluate the relation between VDR polymorphisms, BMD, and fractures.DESIGN: Prospective multicenter large-scale association study.SETTING: The Genetic Markers for Osteoporosis consortium, involving 9 European research teams.PARTICIPANTS: 26,242 participants (18,405 women).MEASUREMENTS: Cdx2 promoter, FokI, BsmI, ApaI, and TaqI polymorphisms; BMD at the femoral neck and the lumbar spine by dual x-ray absorptiometry; and fractures.RESULTS: Comparisons of BMD at the lumbar spine and femoral neck showed nonsignificant differences less than 0.011 g/cm2 for any genotype with or without adjustments. A total of 6067 participants reported a history of fracture, and 2088 had vertebral fractures. For all VDR alleles, odds ratios for fractures were very close to 1.00 (range, 0.98 to 1.02) and collectively the 95% CIs ranged from 0.94 (lowest) to 1.07 (highest). For vertebral fractures, we observed a 9% (95% CI, 0% to 18%; P = 0.039) risk reduction for the Cdx2 A-allele (13% risk reduction in a dominant model).LIMITATIONS: The authors analyzed only selected VDR polymorphisms. Heterogeneity was detected in some analyses and may reflect some differences in collection of fracture data across cohorts. Not all fractures were related to osteoporosis.CONCLUSIONS: The FokI, BsmI, ApaI, and TaqI VDR polymorphisms are not associated with BMD or with fractures, but the Cdx2 polymorphism may be associated with risk for vertebral fractures.
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