Christian M Madsen's research while affiliated with IT University of Copenhagen and other places

Publications (47)

Article
The chemotactic G protein-coupled receptor GPR183 and its most potent endogenous oxysterol ligand 7α,25-dihydroxycholesterol (7α,25-OHC) are important for immune cell positioning in secondary lymphoid tissues. This receptor-ligand pair is associated with various diseases, in some cases contributing favorably and in other cases adversely, making GPR...
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Incidences of pancreatic cancer and acute and chronic pancreatitis are rising globally, and often no curative treatment is available at the time of diagnosis. We tested the hypothesis that low and high plasma concentrations of pancreatic amylase are associated with increased risk of pancreatic cancer, acute pancreatitis, and chronic pancreatitis in...
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Purpose: The aim of this study is to assess the possible association between thyroid-stimulating hormone (TSH) and mortality in hip fracture patients. Patients and methods: The study is based on a hip fracture database from Bispebjerg University Hospital (Copenhagen, Denmark). This database includes all hip fracture patients (ICD-10 codes DS720...
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Background: The high-density lipoprotein (HDL) hypothesis of atherosclerosis has been challenged by clinical trials of cholesteryl ester transfer protein (CETP) inhibitors which failed to show significant reductions in cardiovascular events. Plasma levels of HDL-cholesterol (HDL-C) decline drastically during sepsis and this phenomenon is explained,...
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The vast majority of research about HDL (high-density lipoprotein) has for decades revolved around the possible role of HDL in atherosclerosis and its therapeutic potential within cardiovascular disease prevention; however, failures with therapies aimed at increasing HDL cholesterol has left questions as to what the role and function of HDL in huma...
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Background Vitamin D has a role in bone turnover and potentially bone-metastatic spread of prostate cancer (PCa). The aim of this observational study was to address the association between levels of serum vitamin D, diagnosis of PCa and subsequent mortality in men who underwent a biopsy of the prostate. Methods All men who underwent prostatic biop...
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Background & Aims Almost one third of adults in the West have increased plasma levels of triglycerides. Even mild to moderate hypertriglyceridemia (2–10 mmol/L or 177–886 mg/dL) is associated with an increased risk of acute pancreatitis. However, it is not clear whether hypertriglyceridemia is a cause or result of acute pancreatitis. Lipoprotein li...
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Background Despite the greater prevalence of familial hypercholesterolemia (FH) in subjects with ischemic heart disease (IHD), premature IHD, and severe hypercholesterolemia (low-density lipoprotein ≥190 mg/dl), overall prevalence estimates are not available. Objectives The aim of this study was to provide worldwide estimates of FH prevalence in s...
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Background: Remnant cholesterol in triglyceride-rich lipoproteins is associated observationally and genetic, causally with increased risk of atherosclerotic cardiovascular disease in healthy individuals. Objectives: We tested the hypothesis that an unmet medical need exists in individuals with high nonfasting remnant cholesterol and prior athero...
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Objective The incidence of acute pancreatitis is rising worldwide and currently no curative treatment exist. Clarifying preventable risk factors are important for reduction of morbidity and mortality from acute pancreatitis. In this study, we tested the hypothesis that the risk of acute pancreatitis associated with BMI is partly mediated through hi...
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Objective: High Lp(a) (lipoprotein[a]) cause cardiovascular disease (CVD) in a primary prevention setting; however, it is debated whether high Lp(a) lead to recurrent CVD events. We tested the latter hypothesis and estimated the Lp(a)-lowering needed for 5 years to reduce CVD events in a secondary prevention setting. Approach and Results: From the...
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Background There is strong evidence linking high lipoprotein(a) (Lp(a)) to development of incident cardiovascular disease (CVD), but it is not clear whether Lp(a) is associated with risk of recurrent CVD events in individuals from the general population with preexisting CVD. This is of importance as the first drugs specifically aimed at lowering Lp...
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Hip fractures are associated with increased mortality and it is important to identify risk factors. This study demonstrates that preexisting cardiovascular disease as well as cardiovascular biomarkers that are associated with increased 30-day mortality. These findings can be used to identify high-risk patients who might benefit from specialized car...
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Objective: to test the hypothesis that excess mortality conferred by diabetes following hip fracture decreases with advancing age. Methods: a nationwide population-based cohort study including 154,047 patients who were admitted with a hip fracture in Denmark from 1996 to 2012. Information on hip fracture diagnosis, diabetes, other comorbidities,...
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Background and purpose — Several studies suggest a global increase of centenarians during the 21st century. We describe temporal trends of hip fracture incidence and mortality in this group and compare these patients with a group of younger hip fracture patients with regards to comorbidities and mortality. Patients and methods — The full study popu...
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Purpose This nationwide study assessed associations between comorbidity and mortality after hip fracture in young and middle-aged patients. Methods Data on 19,682 patients aged 18 to 65 years were extracted from Danish registries out of 154,047 patients who experienced a hip fracture between 1996 and 2012. Mortality and comorbidity were assessed u...
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Purpose:: To evaluate the predictive value of pre-fracture medication usage on 30-day mortality following a hip fracture. Methods:: Information on age, sex, fracture type, time of death and Charlson co-morbidity index (CCI) was collected from the Danish National Patient Registry on all patients above 60 years, sustaining a hip fracture during th...
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Background: HDL is quantitatively the most important lipoprotein in most species and mechanistic evidence points toward a role for HDL in normal immune function. We tested the hypothesis that concentrations of HDL cholesterol are associated with risk of autoimmune disease. Methods: From 2 studies of the general population-the Copenhagen General...
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Context How best to identify families with premature myocardial infarction is unclear. Objective We compared approaches to identify familial premature myocardial infarction in the general population using different familial hypercholesterolemia(FH) criteria and low-density lipoprotein(LDL) cholesterol cut points. Design and Setting Clinical and m...
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Vitamin D has been linked to cancer development in both pre‐clinical and epidemiological studies. This study examines the association between serum levels of vitamin D and cancer incidence in the Capital Region of Denmark. Individuals who had vitamin D analyzed at The Copenhagen General Practitioners Laboratory between April 2004 and January 2010 w...
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Background: How mild-to-moderate hypertriglyceridemia (2-10 mmol/L; 177-886 mg/dL) potentially causes acute pancreatitis is unknown; however, cellular studies indicate that inflammation might be a driver of disease progression. We tested the hypotheses that (a) mild-to-moderate hypertriglyceridemia is associated with low-grade inflammation and tha...
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This study examined the association between concentrations of 25OH vitamin D and cancer incidence in individuals from the Capital Region of Denmark who had 25OH vitamin D analyzed in serum via their general practitioner between April 2004 and January 2010 (CopD). CopD data were linked to the Danish Cancer Registry, the National Patient Registry and...
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Background -Familial hypercholesterolemia(FH) is a condition with very high concentrations of low-density lipoprotein(LDL) cholesterol and high risk of ischemic heart disease including myocardial infarction. However, there is limited and contradictory information on whether FH and high LDL cholesterolper seconfer high risk of ischemic stroke. We t...
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Background and purpose — While development in hip fracture incidence and mortality is well examined, none has yet looked at the temporal trends regarding prevalence of co-morbidities. Therefore we investigated changes in incidence of first hip fracture, co-morbidity prevalence, 30 day- and 1-year mortality in hip fracture patients in the Danish pop...
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Aims: Preclinical evidence has indicated that HDL may play an important role in the immune system; however, very little is known about the role of HDL in the immune system in humans. We tested the hypothesis that low and high concentrations of HDL cholesterol are associated with risk of infectious disease in the general population. Methods and re...
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Aims: To identify individuals at high risk of atherosclerotic cardiovascular disease (ASCVD), who are not definite statin eligible according to the 2016 European Society of Cardiology/European Atherosclerosis Society (ESC/EAS) guidelines, based on high concentrations of plasma triglycerides. Methods and results: From the Copenhagen General Popul...
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Abnormal plasma concentrations of potassium in the form of hyper- and hypokalemia are frequent among hospitalized patients and have been linked to poor outcomes. In this study, we examined the prevalence of hypo- and hyperkalemia in patients admitted with a fractured hip as well as the association with 30-day mortality in these patients. A total of...
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Aims: High-density lipoprotein (HDL) cholesterol concentrations are inversely associated with cardiovascular disease and mortality across a range of concentrations, but genetic evidence suggest that extreme high concentrations may paradoxically lead to more cardiovascular disease. We tested the hypothesis that extreme high concentrations of HDL ch...
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Background and purpose: The G protein-coupled receptor Epstein Barr virus-induced gene 2 (EBI2, also known as GPR183) is activated by oxysterols and plays a pivotal role for proper B cell migration during immune responses. While the molecular basis of agonist binding has been addressed in several studies, the concept of biased agonism of EBI2 has...
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Background and purpose — Currently, no clear evidence exists on the pattern of use of antithrombotics at admission in hip fracture patients and how this has changed over time. We investigated temporal trends in—and factors associated with—the use of antithrombotics in patients admitted with a fractured hip.Patients and methods — This was a populati...
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Introduction: Previous smaller studies suggest that anemia is a risk factor for mortality in patients with hip fracture. The purpose of this investigation was to assess the correlation between hemoglobin at admission with 30-day mortality following a hip fracture in a large-scale study. Patients and methods: From January 1996 to December 2012, a...
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Introduction: Orthogeriatric service has been shown to improve outcomes in patients with hip fracture. The purpose of this study is to evaluate the effect of orthogeriatrics at Bispebjerg University Hospital, Denmark. The primary outcome is mortality inhospital and after 1, 3, and 12 months for patients with hip fracture. The secondary outcome is...
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Using data from the Danish national registries on 7317 patients, this study shows that abnormal plasma sodium levels, in the form of hyponatremia and hypernatremia, are prevalent and associated with increased 30-day mortality in hip fracture patients. Introduction The aim of this study was to examine the prevalence of hyponatremia and hypernatremia...
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Red blood cell (RBC) transfusion is a frequently used treatment in patients admitted with a fractured hip, but the use remains an area of much debate. The aim of this study was to determine preoperative factors associated with the risk of receiving a red blood cell transfusion in hip fracture patients. The study included 986 consecutive hip fractur...
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The Epstein-Barr virus induced gene 2 (EBI2) was recently identified as the first oxysterol-activated 7TM receptor. EBI2 is essential for B cell trafficking within lymphoid tissues and thus the humoral immune response in general. Here we characterize the antagonism of the non-peptide molecule GSK682753A, which blocks oxysterol-induced G-protein act...
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Oxysterols are oxygenated cholesterol derivates that are emerging as a physiologically important group of molecules. Although they regulate a range of cellular processes, only few oxysterol-binding effector proteins have been identified, and the knowledge of their binding mode is limited. Recently, the family of G protein-coupled seven transmembran...
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Introduction: Previously, little attention has been paid as to how disturbances in the parathyroid hormone (PTH)-calcium-vitamin D-axis, such as secondary hyperparathyroidism (SHPT), relate to mortality amongst hip fracture patients. This study aimed to (1) determine if SHPT is associated with mortality in this group of patients, (2) investigate t...

Citations

... Heterozygous familial hypercholesterolaemia (HeFH), an autosomal semi-dominant genetic disorder that 3 affects approximately 1 in 300 persons or over 30 million people worldwide, is characterized by elevated 4 low-density lipoprotein cholesterol (LDL-C) levels from birth, and if untreated, is associated with 5 premature cardiovascular morbidity and mortality from accelerated atherosclerotic cardiovascular 6 disease (ASCVD) 1,2 . The condition results from dysfunctional variants in genes responsible for the 7 clearance of LDL-C. ...
... Although HDL-C has been traditionally viewed as protective in ASCVD risk, many recent observational studies performed across independent cohorts have noted that very high HDL-C is associated with higher incident ASCVD and mortality (16,17,(81)(82)(83)(84)(85)(86)(87)(88)(89)(90)(91)(92)(93)(94) (Table 4). ...
... In this study, by analyzing the relationship between the comorbidities and prognosis of ICU sepsis patients, it was found that previous cardiovascular disease was a related risk factor for death in sepsis patients. This conclusion is consistent with Wu et al, [24] Ho et al, [25] and Sinning et al [26] Trinder et al [27] believed that high-density lipoprotein cholesterol is a major risk factor for cardiovascular disease, and inhibition of cholesteryl ester transfer protein can maintain high-density lipoprotein cholesterol levels and improve outcomes in patients with sepsis. The effect of comorbid cardiovascular disease on the prognosis of sepsis patients may be related to pathophysiological mechanisms such as inflammatory response burst, hemodynamic disturbance, and accelerated atherosclerosis. ...
... Following an update in 2018, the most recent version of DaPCaR includes a population of 153,373 unique men with a histological assessment of the prostate from 1995 to 2016. So far, this registry has resulted in several publications describing different epidemiological aspects of prostate cancer diagnosis and outcomes [4][5][6][7][8][9][10][11][12][13]. The two versions of DaPCaR were laborious to use as most data had to be manually imputed with no regular updates. ...
... Genetic variants (LPL, APOA5, APOC3, ANGPTL3, and ANGPTL4) associated with increased plasma TG levels increase the risk of acute pancreatitis [74]. Jung et al. [21] demonstrated that ANGPTL4 accelerates the pathological exacerbation of acute pancreatitis by inducing alveolar cell damage and releasing large amounts of inflammatory cytokines. ...
... Heterozygous familial hypercholesterolaemia (HeFH), an autosomal semi-dominant genetic disorder that affects approximately 1 in 300 persons or over 30 million people worldwide, is characterized by elevated low-density lipoprotein cholesterol (LDL-C) levels from birth and, if untreated, is associated with premature cardiovascular morbidity and mortality from accelerated atherosclerotic cardiovascular disease (ASCVD). 1,2 The condition results from dysfunctional variants in genes responsible for the clearance of LDL-C. This is mainly due to loss-of-function variants in the low-density lipoprotein receptor gene (LDLR) and less commonly the apolipoprotein B gene (APOB) ...
... Mounting evidence indicated that RC promoted coronary atherosclerosis, coronary artery calcium(CAC) progression, atherosclerotic cardiovascular disease (ASCVD) and even led to cardiovascular death. 7,9,[40][41][42][43][44] . Regrettably, in our study, no association was found between RC and Gensini score, which represented the severity of the coronary lesion. ...
... [4] Patients with hyperthyroidism in the pre-operative period were shown to have an increased risk of post-operative complications. Rapacki et al. [5] claimed that serum thyroid-stimulating hormone (TSH) level was associated with mortality. However, the effect of only the TSH value was evaluated, but the mortality relationship between hypothyroid, hyperthyroid and euthyroid patients' groups were not evaluated. ...
... Recognized metabolic risk factors for acute pancreatitis are obesity, dyslipidemia, and diabetes mellitus [5][6][7][8][9][10][11][12]. Several meta-analyses have shown that obesity, as one of the most important negative prognostic factors of acute pancreatitis, increases the risk of development, correlates with the severity, development of local and systemic complications of the disease [5][6][7]. ...
... In contrast to the results of the above studies on PCSK9 inhibitors, which showed that modest decreases of plasma Lp(a) levels are associated with reductions of ASCVD risk, a Mendelian randomization analysis demonstrated that in order to achieve an ASCVD risk reduction by 20%, as that observed with LDL-cholesterol lowering by 38.67 mg/dL, a 101.5 mg/dL Lp(a) reduction is required [42]. Subsequent analyses using a similar methodology demonstrated that the Lp(a) reduction in order to achieve a 20% ASCVD risk reduction, should be 65.7 mg/dL [43] or 50 mg/dL [44]. It is noted that the above studies evaluated populations in the "primary prevention" state, and therefore their relevance to outcome trials of secondary prevention is not strong enough. ...