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Sökning: WFRF:(Hamsten Anders) > (2005-2009)

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1.
  • Elfström, Peter, 1974-, et al. (författare)
  • Cardiomyopathy, pericarditis and myocarditis in a population-based cohort of inpatients with coeliac disease
  • 2007
  • Ingår i: Journal of Internal Medicine. - Oxford : Blackwell Publishing. - 0954-6820 .- 1365-2796. ; 262:5, s. 545-554
  • Tidskriftsartikel (refereegranskat)abstract
    • Objectives: We investigated the risk of myocarditis, cardiomyopathy, and pericarditis in patients with celiac disease (CD) from a general population cohort.Subjects and methods: Through the Swedish national registers we identified 9363 children and 4969 adults with a diagnosis of CD (1964–2003). These individuals were matched with upto five reference individuals for age, sex, calendar year and county (n = 69 851). Cox regression estimated hazard ratios (HRs) for later heart disease. Main outcome measures: Myocarditis, cardiomyopathy (any or dilated), and pericarditis defined according torelevant international classification of disease codes in the Swedish national inpatient register.Results: Celiac disease diagnosed in childhood was not associated with later myocarditis (HR = 0.2; 95% CI = 0.0–1.5), cardiomyopathy of any type (HR = 0.8; 95% CI = 0.2–3.7), or pericarditis (HR = 0.4; 95% CI = 0.1–1.9). Restricting our analyses to adulthood CD and heart disease diagnosed from 1987 and onwards in departments of cardiology ⁄ internal medicine, we found no association between CD and later myocarditis (HR = 2.1; 95% CI = 0.4–11.7), dilated cardiomyopathy (HR = 1.7; 95% CI = 0.4– 6.5) or pericarditis (HR = 1.5; 95% CI = 0.5–4.0).Conclusion: This study found no association between CD, later myocarditis, cardiomyopathy or pericarditis
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  • Hägg, Sara, 1977-, et al. (författare)
  • Multi-Organ Expression Profiling Uncovers a Gene Module in Coronary Artery Disease Involving Transendothelial Migration of Leukocytes and LIM Domain Binding 2 : The Stockholm Atherosclerosis Gene Expression (STAGE) Study
  • 2009
  • Ingår i: PLoS Genetics. - : PLoS Genetics. - 1553-7390 .- 1553-7404. ; 5:12, s. e1000754-
  • Tidskriftsartikel (refereegranskat)abstract
    • Environmental exposures filtered through the genetic make-up of each individual alter the transcriptional repertoire in organs central to metabolic homeostasis, thereby affecting arterial lipid accumulation, inflammation, and the development of coronary artery disease (CAD). The primary aim of the Stockholm Atherosclerosis Gene Expression (STAGE) study was to determine whether there are functionally associated genes (rather than individual genes) important for CAD development. To this end, two-way clustering was used on 278 transcriptional profiles of liver, skeletal muscle, and visceral fat (n=66/tissue) and atherosclerotic and unaffected arterial wall (n=40/tissue) isolated from CAD patients during coronary artery bypass surgery. The first step, across all mRNA signals (n=15,042/12,621 RefSeqs/genes) in each tissue, resulted in a total of 60 tissue clusters (n=3958 genes). In the second step (performed within tissue clusters), one atherosclerotic lesion (n=49/48) and one visceral fat (n=59) cluster segregated the patients into two groups that differed in the extent of coronary stenosis (P=0.008 and P=0.00015). The associations of these clusters with coronary atherosclerosis were validated by analyzing carotid atherosclerosis expression profiles. Remarkably, in one cluster (n=55/54) relating to carotid stenosis (P=0.04), 27 genes in the two clusters relating to coronary stenosis were confirmed (n=16/17, P<10-27and-30). Genes in the transendothelial migration of leukocytes (TEML) pathway were overrepresented in all three clusters, referred to as the atherosclerosis module (A-module). In a second validation step, using three independent cohorts, the A-module was found to be genetically enriched with CAD risk by 1.8-fold (P<0.004). The transcription co-factor LIM domain binding 2 (LDB2) was identified as a potential high-hierarchy regulator of the A-module, a notion supported by subnetwork analysis, cellular and lesion expression of LDB2, and the expression of 13 TEML genes in Ldb2-deficient arterial wall. Thus, the A-module appears to be important for atherosclerosis development and together with LDB2 merits further attention in CAD research.
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  • Mälarstig, Anders, et al. (författare)
  • Raised Interleukin-10 is an Indicator of Poor Outcome and Enhanced Systemic Inflammation in Patients with Acute Coronary Syndrome
  • 2008
  • Ingår i: Heart. - : BMJ. - 1355-6037 .- 1468-201X. ; 94:6, s. 724-9
  • Tidskriftsartikel (refereegranskat)abstract
    • OBJECTIVES: To re-evaluate the relation between plasma interleukin-10 (IL-10) concentration at hospital admission and outcome and to investigate the impact of single nucleotide polymorphisms (SNP) in the IL-10 gene in patients with non-ST elevation acute coronary syndrome (ACS). DESIGN: Determination of IL-10 plasma concentrations and genotyping of SNPs in the IL-10 gene in a prospective trial of patients with ACS and in a group of healthy controls. PATIENTS: 3179 patients in the Fragmin and fast revascularisation during InStability in Coronary artery disease II (FRISC II) trial and 393 healthy controls. MAIN OUTCOME MEASURES: Mortality and incidence of myocardial infarction (MI) at 12 months. RESULTS: The median and interquartile ranges of IL-10 were 0.8 (0.5-1.0) pg/ml in healthy controls and 1.1 (0.7-1.9) pg/ml in patients (p<0.001). In patients, IL-10 predicted a crude risk increase of death/MI, with the highest risk observed in the fourth quartile (adjusted odds ratio 1.7 (95% confidence interval 1.2 to 2.3)). Adjustment for common risk indicators, including C-reactive protein and interleukin-6, weakened the association to a non-significant level. The 1170 CC genotype weakly predicted increased plasma concentrations of IL-10 in patients (p = 0.04) and in controls (p = 0.03), which was consistent with the modest association of this variant with coronary disease (p = 0.01). CONCLUSION: In contrast with some previous reports, we conclude that IL-10 reflects a proinflammatory state in patients with ACS and we therefore suggest that IL-10 is as effective a biomarker for the risk prediction of future cardiovascular events as other markers of systemic inflammation.
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6.
  • Mälarstig, Anders, et al. (författare)
  • Variants of the interferon regulatory factor 5 gene regulate expression of IRF5 mRNA in atherosclerotic tissue but are not associated with myocardial infarction
  • 2008
  • Ingår i: Arteriosclerosis, Thrombosis and Vascular Biology. - 1079-5642 .- 1524-4636. ; 28:5, s. 975-982
  • Tidskriftsartikel (refereegranskat)abstract
    • BACKGROUND: Signaling events after activation of toll-like receptors (TLRs) are important mechanisms promoting inflammation in the atherosclerotic plaque. INF regulatory factor 5 (IRF5) is one of the mediators of downstream effects of TLRs. Several single nucleotide polymorphisms (SNPs) in the IRF5 gene have been found to be associated with systemic lupus erythematosus. METHODS AND RESULTS: We examined IRF5 mRNA expression in carotid atherosclerotic tissue (n=99) and the case-control association between SNPs in the IRF5 gene with myocardial infarction (MI) (n=376+387) and unstable coronary artery disease (CAD) (n=3101+445). Among unstable CAD patients, association of IRF5 SNPs with recurrent coronary events (n=401) was also investigated. The IRF5 mRNA expression was increased in atherosclerotic tissue compared with control tissue (P<0.001). Significant associations with IRF5 expression was observed for 6 of 10 SNPs in the study. However, the IRF5 SNPs examined were neither associated with the risk of precocious MI, nor with unstable CAD or risk of recurrent cardiovascular events in unstable CAD patients. CONCLUSIONS: IRF5 mRNA is expressed in cells in atherosclerotic tissue and its expression is modified by SNPs in the IRF5 gene. Genetic variation at the IRF5 locus was, however, not associated with CAD or related phenotypes.
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  • Hägg, Daniel, 1974, et al. (författare)
  • Expression profiling of macrophages from subjects with atherosclerosis to identify novel susceptibility genes.
  • 2008
  • Ingår i: International journal of molecular medicine. - 1107-3756. ; 21:6, s. 697-704
  • Tidskriftsartikel (refereegranskat)abstract
    • Although a number of environmental risk factors for atherosclerosis have been identified, heredity seems to be a significant independent risk factor. The aim of our study was to identify novel susceptibility genes for atherosclerosis. The screening process consisted of three steps. First, expression profiles of macrophages from subjects with atherosclerosis were compared to macrophages from control subjects. Secondly, the subjects were genotyped for promoter region polymorphisms in genes with altered gene expression. Thirdly, a population of subjects with coronary heart disease and control subjects were genotyped to test for an association with identified polymorphisms that affected gene expression. Twenty-seven genes were differentially expressed in both macrophages and foam cells from subjects with atherosclerosis. Three of these genes, IRS2, CD86 and SLC11A1 were selected for further analysis. Foam cells from subjects homozygous for the C allele at the -765C-->T SNP located in the promoter region of IRS2 had increased gene expression compared to foam cells from subjects with the nonCC genotype. Also, macrophages and foam cells from subjects homozygous for allele 2 at a repeat element in the promoter region of SLC11A1 had increased gene expression compared to macrophages and foam cells from subjects with the non22 genotype. Genotyping of 512 pairs of subjects with coronary heart disease (CHD) and matched controls revealed that subjects homozygous for C of the IRS2 SNP had an increased risk for CHD; odds ratio 1.43, p=0.010. Immunohistochemical staining of human carotid plaques showed that IRS2 expression was localised to macrophages and endothelial cells in vivo. Our method provides a reliable approach for identifying susceptibility genes for atherosclerosis, and we conclude that elevated IRS2 gene expression in macrophages may be associated with an increased risk of CHD.
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  • Kalani, Majid, et al. (författare)
  • Beneficial effects of dalteparin on haemostatic function and local tissue oxygenation in patients with diabetes, severe vascular disease and foot ulcers.
  • 2007
  • Ingår i: Thrombosis research. - : Elsevier BV. - 0049-3848 .- 1879-2472. ; 120:5, s. 653-61
  • Tidskriftsartikel (refereegranskat)abstract
    • INTRODUCTION: A state of hypercoagulation and fibrinolytic dysfunction is present in individuals with diabetes, which may contribute to disturbed skin microcirculation and impaired ulcer healing. We have previously reported an improved outcome of chronic diabetic foot ulcers during treatment with dalteparin. In the present study we investigated the effects of dalteparin on skin microcirculation and haemostatic function. MATERIALS AND METHODS: 87 patients with diabetes, peripheral arterial obliterative disease and chronic foot ulcers were investigated in a prospective, randomised, double-blind and placebo-controlled study. They were randomised to treatment with subcutaneous injections of 5000 U dalteparin (n=44) or placebo (n=43), once daily until ulcer healing or for a maximum of six months. Plasma fibrinogen, fibrin gel structure [permeability coefficient (Ks) and fiber mass/length ratio (mu)], prothrombin fragment 1+2 (F1+2) antigen, plasminogen activator inhibitor-1 (PAI-1) activity and tissue plasminogen activator (tPA) antigen were analysed before randomization (baseline value), and at the end of the treatment period. The skin microcirculation of the foot was investigated by transcutaneous oxygen tension (TcPO(2)) and laser Doppler fluxmetry (LDF). RESULTS: The changes (Delta-values) of Ks, mu, tPA and TcPO(2) were higher (p<0.05) during treatment with dalteparin, as compared to the changes during treatment with placebo. At baseline, plasma fibrinogen and Ks were significantly correlated to TcPO(2). CONCLUSIONS: Local skin oxygenation improved and a less thrombogenic fibrin gel structure was formed in patients treated with dalteparin. Beneficial effects on haemostatic function are likely to contribute to the improved skin oxygenation observed during treatment with dalteparin.
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