Publications by authors named "Jonsdottir I"

Empirical studies worldwide show that warming has variable effects on plant litter decomposition, leaving the overall impact of climate change on decomposition uncertain. We conducted a meta-analysis of 109 experimental warming studies across seven continents, using natural and standardised plant material, to assess the overarching effect of warming on litter decomposition and identify potential moderating factors. We determined that at least 5.

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Burnout is caused by long term psychosocial stress and has, besides the fatigue and mental health burden, been associated with increased risk of adverse physical health, such as for example type 2 diabetes. This study aims to investigate the glucose and insulin levels in individuals with stress related burnout, by assessing these metabolic markers in response to a standard oral glucose tolerance test (OGTT). 38 cases with burnout (13 men and 25 women) and 35 healthy controls (13 men and 22 women) in the age 24-55 were included in the study.

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Environmental changes, such as climate warming and higher herbivory pressure, are altering the carbon balance of Arctic ecosystems; yet, how these drivers modify the carbon balance among different habitats remains uncertain. This hampers our ability to predict changes in the carbon sink strength of tundra ecosystems. We investigated how spring goose grubbing and summer warming-two key environmental-change drivers in the Arctic-alter CO fluxes in three tundra habitats varying in soil moisture and plant-community composition.

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Background: The contributions of genetic and environmental risk factors to hidradenitis suppurativa (HS) are both poorly understood.

Objective: To identify sequence variants that associate with HS and determine the contribution of environmental risk factors and inflammatory diseases to HS pathogenesis.

Methods: A genome-wide association meta-analysis of 4814 HS cases (Denmark: 1977; Iceland: 1266; Finland: 800; UK: 569; and US: 202) and 1.

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Introduction: A preventive approach to occupational health and safety management (OHSM) can improve working conditions, but more knowledge is needed on how this should be organised in practice. Here, we describe the development, validity and reliability of a questionnaire used to examine employers' preventive OHSM within the Swedish welfare sector. Furthermore, employers' knowledge of preventive OHSM was explored using the survey data.

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  • * The research identified 12 significant genetic markers linked to MG, with certain markers associated specifically with early-onset (under 50) and late-onset (50 and older) forms of the disease.
  • * Additionally, the study highlighted the potential role of genetic factors in determining the age of disease onset and demonstrated that polygenic risk scores could help predict MG status, explaining over 4% of the variation in disease presence.
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  • Researchers analyzed genetic data from nearly 130,000 cancer patients and over 730,000 healthy controls to identify variants linked to cancer risk across 22 cancer types.
  • Four high-risk genes were found: BIK (prostate cancer), ATG12 (colorectal cancer), TG (thyroid cancer), and CMTR2 (lung cancer and melanoma).
  • Additionally, two genes, AURKB (general cancer risk) and PPP1R15A (breast cancer), were associated with decreased cancer risk, indicating potential pathways for cancer prevention strategies.
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Background: Signal transducer and activator of transcription 6 (STAT6) is central to type 2 (T2) inflammation, and common noncoding variants at the STAT6 locus associate with various T2 inflammatory traits, including diseases, and its pathway is widely targeted in asthma treatment.

Objective: We sought to test the association of a rare missense variant in STAT6, p.L406P, with T2 inflammatory traits, including the risk of asthma and allergic diseases, and to characterize its functional consequences in cell culture.

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  • Immunoglobulin G (IgG) is the primary type of antibody in human blood and exists in four subclasses (IgG1 to IgG4), which are influenced by specific genes.
  • A genome-wide association study involving 4,334 adults and 4,571 children identified ten new variants and confirmed four known variants linked to IgG subclass levels, affecting conditions like asthma and autoimmune diseases.
  • Significant links were found between certain genetic allotypes and specific IgG subclasses, with notable findings showing that lower IgG4 levels can both protect against childhood asthma and increase the risk of inflammatory bowel disease.
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  • The study aims to investigate the genetic factors associated with accessory atrioventricular pathways (APs) and related heart rhythm disorders using a genome-wide association study (GWAS).
  • It involved analyzing genetic data from over 1,200,000 control individuals and 2,310 individuals with APs from multiple countries and various health databases.
  • Key findings revealed three significant genetic variants linked to APs, particularly in specific genes (CCDC141 and SCN10A), with implications for understanding conditions like paroxysmal supraventricular tachycardia (PSVT).
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Age at menopause (AOM) has a substantial impact on fertility and disease risk. While many loci with variants that associate with AOM have been identified through genome-wide association studies (GWAS) under an additive model, other genetic models are rarely considered. Here through GWAS meta-analysis under the recessive model of 174,329 postmenopausal women from Iceland, Denmark, the United Kingdom (UK; UK Biobank) and Norway, we study low-frequency variants with a large effect on AOM.

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Plant phenology, the timing of recurrent biological events, shows key and complex response to climate warming, with consequences for ecosystem functions and services. A key challenge for predicting plant phenology under future climates is to determine whether the phenological changes will persist with more intensive and long-term warming. Here, we conducted a meta-analysis of 103 experimental warming studies around the globe to investigate the responses of four phenophases - leaf-out, first flowering, last flowering, and leaf coloring.

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  • Multiple myeloma (MM) is a type of cancer affecting plasma cells, with a significant genetic component that is not fully understood.
  • A large genome-wide study identified 35 risk loci related to MM, including 12 new ones, and revealed two main inherited risk factors: longer telomeres and higher levels of B-cell maturation antigen (BCMA) and interleukin-5 receptor alpha (IL5RA) in the blood.
  • The genetic variant rs34562254-A increases the risk of MM by enhancing B-cell responses, contrasting with loss-of-function variants in TNFRSF13B that lead to B-cell immunodeficiency.
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Gene promoter and enhancer sequences are bound by transcription factors and are depleted of methylated CpG sites (cytosines preceding guanines in DNA). The absence of methylated CpGs in these sequences typically correlates with increased gene expression, indicating a regulatory role for methylation. We used nanopore sequencing to determine haplotype-specific methylation rates of 15.

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Autoimmune thyroid disease (AITD) is a common autoimmune disease. In a GWAS meta-analysis of 110,945 cases and 1,084,290 controls, 290 sequence variants at 225 loci are associated with AITD. Of these variants, 115 are previously unreported.

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  • - Exhaustion disorder (ED) is a stress-related condition with physical and mental symptoms, linked to central nervous system (CNS) processes.
  • - The study measured plasma levels of 92 neuro-related proteins in 163 ED patients and 100 healthy controls, finding significant differences at diagnosis and follow-up.
  • - Results showed 40 proteins were higher in ED patients at diagnosis, 36 of which decreased over time, while two proteins remained lower in ED patients compared to controls, indicating ongoing CNS involvement in ED.
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The breakdown of plant material fuels soil functioning and biodiversity. Currently, process understanding of global decomposition patterns and the drivers of such patterns are hampered by the lack of coherent large-scale datasets. We buried 36,000 individual litterbags (tea bags) worldwide and found an overall negative correlation between initial mass-loss rates and stabilization factors of plant-derived carbon, using the Tea Bag Index (TBI).

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Arctic and alpine tundra ecosystems are large reservoirs of organic carbon. Climate warming may stimulate ecosystem respiration and release carbon into the atmosphere. The magnitude and persistency of this stimulation and the environmental mechanisms that drive its variation remain uncertain.

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  • Genome-wide association studies (GWASs) analyzed data from over 41,000 infertility cases and 687,000 controls, identifying 21 genetic risk loci for infertility, with 12 previously unreported.
  • The study found significant genetic correlations between female infertility and conditions like endometriosis and polycystic ovary syndrome, suggesting interactions between genetic risk factors.
  • Exome sequencing revealed that women with rare testosterone-lowering variants are at higher risk for infertility, yet no general correlation between reproductive hormones and infertility was found, highlighting a complex genetic landscape.
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Objectives: To investigate whether intensified cooperation between general practitioner (GP), care manager and rehabilitation coordinator (RC) for patients sick-listed for stress-related mental disorder, combined with a person-centred dialogue meeting with employer, could reduce sick-leave days compared with usual care manager contact.

Design: Pragmatic cluster-randomised controlled trial, randomisation at primary care centre (PCC) level.

Setting: PCCs in Region Västra Götaland, Sweden, with care manager organisation.

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Introduction: Prepregnancy overweight and obesity is an increasing public health issue worldwide, including Iceland, and has been associated with higher risk of adverse maternal and birth outcomes. The aim of this study was to investigate trends in prepregnancy weight amongst women in North Iceland from 2004 to 2022, and the prevalence of overweight and obesity in this population.

Material And Methods: This retrospective cross-sectional study included all women who gave birth at Akureyri Hospital in North Iceland between 2004 and 2022 (N = 7410).

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Objectives: In this study, we explored healthcare workers' (HCWs) worry perception and its association with their work situation during the first wave of the COVID-19 pandemic.

Design: A web-based multimethods survey including multiple choice and open-ended questions was used.

Setting: The study was conducted at a university hospital in Sweden.

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Background: Primary health care is the setting for most patients with stress-related mental health problems. Good care processes are important for patients with stress-related mental health problems and the complex needs of these patients has become a challenge for primary care settings which is traditionally designed to manage acute episodes of one illness. The care process of these patients is thus interesting to investigate.

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Two-thirds of all human conceptions are lost, in most cases before clinical detection. The lack of detailed understanding of the causes of pregnancy losses constrains focused counseling for future pregnancies. We have previously shown that a missense variant in synaptonemal complex central element protein 2 (SYCE2), in a key residue for the assembly of the synaptonemal complex backbone, associates with recombination traits.

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