Publications by authors named "Steffen U Thorsen"

Purpose Of Review: The aim of this review is to explore a possible link between immunological candidate proteins, identified through modern proteomic techniques, and preeclampsia (PE) and fetal growth restriction (FGR).

Recent Findings: Proteomics has become a promising tool in the search for disease pathways, drug targets, and biomarkers. PE and FGR are adverse pregnancy complications with supposed immunological involvement in their pathogenesis, but no circulating immunological biomarkers are currently established for diagnosis and risk stratification.

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Stress has been associated with less effective vaccine responses in adults. This review aims to investigate the evidence for a similar association in children. A systematic review search was conducted in January 2021 in three databases: Medline, Embase and PsycInfo.

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Type 1 diabetes (T1D) is associated with general- and diabetes-specific stress which has multiple adverse effects. Hence measuring stress is of great importance. An algometer measuring pressure pain sensitivity (PPS) has been shown to correlate to certain stress measures in adults.

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Objectives: Objectively validated pediatric sleep questionnaires covering a broader age range and different sleep disturbances are lacking, therefore we developed the Sleep Screening Questionnaire Children and Adolescents (SSQ-CA) and compared it with objective sleep parameters.

Methods: This child-reported questionnaire was developed by a multidisciplinary panel and face validated. In a cross-sectional prospective design, participants aged 6-17, answered the questionnaire twice with 21-28 days in between, wore actigraphy (AG) and kept a sleep diary for seven nights and home-polysomnography (PSG) for one of these nights.

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Studies examining the association between type 1 diabetes (T1D) and atopic diseases, i.e., atopic dermatitis, allergic rhinitis and asthma have yielded conflicting results due to different algorithms for classification, sample size issues and risk of referral bias of exposed cohorts with frequent contact to health care professionals.

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Purpose Of Review: The aim of this review is to explore a possible link between cell-free DNA (cfDNA) and cardiovascular disease (CVD), which may hold valuable potential for future diagnostics.

Recent Findings: cfDNA has become topic of high interest across several medical fields. cfDNA is used as a diagnostic biomarker in cancer, prenatal care, and transplantation.

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Objective: Diabetes devices that deliver insulin and measure blood glucose levels are cornerstones in modern treatment of type 1 diabetes. However, their use is frequently associated with the development of skin problems, particularly eczema and wounds. Proper skin care may prevent skin problems, yet evidence-based information from interventional studies is missing.

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Contact dermatitis because of use of diabetes devices is frequent in individuals with type 1 diabetes (TD1), especially in the pediatric age group, but the putative role of a constitutional impaired skin barrier in persons with TD1 is unclear. This study examined the skin barrier function by the measurement of natural moisturizing factor and free cytokines collected through skin tape strips, as well as biophysical markers and the skin microbiome, in persons with TD1 than to age- and sex-matched healthy controls. All measurements were done in nonlesional skin.

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Objective: To examine whether iron intake and genetically determined iron overload interact in predisposing to the development of childhood islet autoimmunity (IA) and type 1 diabetes (T1D).

Research Design And Methods: In The Environmental Determinants of Diabetes in the Young (TEDDY) study, 7,770 genetically high-risk children were followed from birth until the development of IA and progression to T1D. Exposures included energy-adjusted iron intake in the first 3 years of life and a genetic risk score (GRS) for increased circulating iron.

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Aims: The objective of the study was to compare grade point averages (GPAs) on compulsory school exit exams (exam GPA) and educational attainment at age 16 and 20 for individuals with and without type 1 diabetes.

Methods: This study was a population-based retrospective cohort study, which included the 1991 to 1998 birth cohorts in Denmark. Follow-up was conducted at age 16 and 20 (follow-up period; 1 January, 2007 to 31 December, 2018).

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Vitamin D has shown immune-modulatory effects but mostly in in vitro and animal studies. Regulatory T cells (Treg) are important for a balanced immune system. The relationship between vitamin D on the number of circulating neonatal Treg is unclear.

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The use of insulin pump and glucose sensor is advantageous, but unfortunately many experience skin problems. To reduce or overcome skin problems, patients use additional products or change their sets preterm. Therefore, the aim was to investigate costs related to skin problems.

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(1) Background: Zinc is an essential micronutrient and zinc deficiency is associated with immune dysfunction. The neonatal immune system is immature, and therefore an optimal neonatal zinc status may be important. The aim of this study was to investigate the possible association between neonatal whole blood (WB)-Zinc content and several immune markers.

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Article Synopsis
  • Researchers investigated the relationship between iron supplementation during pregnancy and early life with the risk of developing childhood type 1 diabetes (T1D), using data from a large Danish birth cohort.
  • The study included 257 children diagnosed with T1D and analyzed maternal iron supplementation and offspring iron intake during the first 18 months of life.
  • Findings indicated no significant link between maternal iron supplementation and T1D risk (HR 1.05), but offspring iron droplets in early life were associated with a lower risk of T1D (HR 0.74).
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(1) Background: High iron associates with inflammation and type 1 diabetes (T1D). Iron is essential not only for neonatal development but also for infectious microorganisms. The neonatal immune system is immature, and innate immunity prevails before immunocompetence develops.

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Studies on vitamin D status during pregnancy and risk of type 1 diabetes mellitus (T1D) lack consistency and are limited by small sample sizes or single measures of 25-hydroxyvitamin D (25(OH)D). We investigated whether average maternal 25(OH)D plasma concentrations during pregnancy are associated with risk of childhood T1D. In a case-cohort design, we identified 459 children with T1D and a random sample (n = 1,561) from the Danish National Birth Cohort (n = 97,127) and Norwegian Mother and Child Cohort Study (n = 113,053).

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Background: The incidence of type 1 diabetes (T1D) is rising, which might be due to the influence of environmental factors. Biological and epidemiological evidence has shown that excess iron is associated with beta-cell damage and impaired insulin secretion.

Aim: In this review, our aim was to assess the association between iron and the risk of T1D.

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Article Synopsis
  • Higher iron levels in newborns may increase the risk of developing type 1 diabetes mellitus (T1D) in childhood, prompting the need for further investigation.
  • A study involving 199 T1D children and an equal number of controls found that doubling iron content in neonatal blood raised T1D risk significantly (odds ratio of 2.55).
  • The research indicated that iron levels were associated with maternal age and were generally higher in girls compared to boys.
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(1) Background: We aimed to examine if 25-hydroxyvitamin D (25(OH)D) was related to the peripheral immunological and inflammatory signature both at birth, and in newly diagnosed patients with childhood type 1 diabetes (T1D) and their healthy controls; (2) Methods: The birth cohort consisted of 470 patients and 500 healthy controls. Dried blood samples were collected from the neonates in the period 1981-1999. The newly diagnosed cohort consisted of 460 patients and 453 siblings.

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Aim: Immunologic events during fetal life may play a part in the pathogenesis of type 1 diabetes (T1D). As zinc is involved in immunologic processes, the purpose was to investigate perinatal zinc status and the later risk of developing T1D and association to age at onset.

Methods: A population-based case-control study based on data from Danish Childhood Diabetes Register and the Danish Newborn Screening Biobank.

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Background/aim: An in-depth understanding of the early phase of type 1 diabetes (T1D) pathogenesis is important for targeting primary prevention. We examined if 14 preselected mediators of immune responses differed in neonates that later developed T1D compared to control neonates.

Methods: The study is a case-control study with a 1:2 matching.

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Background: Type 1 diabetes (T1D) is an organ-specific autoimmune disease with an increase in incidence worldwide including Denmark. The triggering receptor expressed on myeloid cells-1 (TREM-1) is a potent amplifier of pro-inflammatory responses and has been linked to autoimmunity, severe psychiatric disorders, sepsis, and cancer.

Hypothesis: Our primary hypothesis was that levels of soluble TREM-1 (sTREM-1) differed between newly diagnosed children with T1D and their siblings without T1D.

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A new perspective on autoantibodies as pivotal players in the pathogenesis of type 1 diabetes (T1D) has recently emerged. Our key objective was to examine whether increased levels of autoantibodies against the -cell autoantigens glutamic acid decarboxylase (isoform 65) (GADA) and insulinoma associated antigen-2A (IA-2A) mirrored the 3.4% annual increase in incidence of T1D.

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Aims/hypothesis: The aim of this work was to assess whether neonatal levels of 25-hydroxyvitamin D (25(OH)D) are associated with risk of developing type 1 diabetes before the age of 18 years.

Methods: Two large-scale studies with different designs-a case-cohort and a case-control-were conducted using Danish national register data and biobank material. Weighted Cox regression and conditional logistic regression were used to calculate HRs and ORs, respectively.

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Objective Basic and epidemiologic studies on inflammatory bowel disease (IBD) have suggested an association between vitamin D and IBD risk. Though, the literature on IBD - especially pediatric-onset IBD - and vitamin D is still in its cradle. We therefore wanted to examine if levels of 25(OH)D at birth were associated with increased risk of developing pediatric-onset IBD.

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