Publications by authors named "Hroenn Gudmundsdottir"

Ecological momentary assessment (EMA) collects real-time data in daily life, enhancing ecological validity and reducing recall bias. An EMA questionnaire that measures symptoms and transdiagnostic factors was recently developed with network modeling purposes. This study examines this EMA protocol's (a) subjective experience (e.

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The thermophilic bacterium Rhodothermus marinus has mainly been studied for its thermostable enzymes. More recently, the potential of using the species as a cell factory and in biorefinery platforms has been explored, due to the elevated growth temperature, native production of compounds such as carotenoids and exopolysaccharides, the ability to grow on a wide range of carbon sources including polysaccharides, and available genetic tools. A comprehensive understanding of the metabolism of cell factories is important.

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Although nitrene chemistry is promising for the light-induced modification of organic compounds, the reactivity of large polycyclic aromatic compounds and the effects of their curvature remain unexplored. Irradiation of azidocorannulene () in methanol/acetonitrile followed by HCl addition produced diastereomers and . Azirine is apparently trapped by methanol to form diastereomeric acetal derivatives that are hydrolyzed with HCl to yield and '.

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Importance: Comprehensive data on the prevalence of various life stressors and their role in posttraumatic stress disorder (PTSD) among women are lacking.

Objective: To determine the prevalence of a broad range of life stressors and their association with PTSD in a large nationally representative cohort of women.

Design, Setting, And Participants: This cross-sectional analysis used data from the population-based Stress-And-Gene-Analysis, which invited women in Iceland to complete an online survey from March 1, 2018, to July 1, 2019.

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Background: Cystic neuroendocrine tumor liver metastases (NETLM) are rare and dynamics in the liquid compartment often misinterpreted as rapid progression, affecting selection for liver resection candidates. This study retrospectively evaluates surgical and oncologic outcomes in patients with cystic versus solid NETLM from small bowel and pancreatic primaries.

Methods: Between 2000 and 2020, 12 patients with cystic NETLM were identified among 464 patients who underwent >90 % tumor cytoreduction debulking hepatectomy at the Mayo Clinic.

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Background: Calciphylaxis is a rare and serious complication in patients with kidney disease. It has few treatment options and poor prognosis. Hyperbaric oxygen therapy (HBOT) may improve wound healing and was added to our conventional care in 2012.

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  • The EuroHeart project aims to establish standardized definitions for outcome measures in cardiovascular clinical studies to enhance the evaluation of medical interventions and care.
  • A group of 82 experts formed five Working Groups to identify key outcome measures for various cardiovascular conditions, using a systematic review and consensus methods to define these measures.
  • In total, 24 mandatory (Level 1) and 48 optional (Level 2) outcome measures were established across five cardiovascular disease areas, providing a foundation for improved research and patient care quality.
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  • Infratentorial superficial siderosis (iSS) is a neurological disorder caused by iron deposits on the brain and spinal cord due to ongoing bleeding.
  • This condition often leads to symptoms like hearing loss, balance issues, and problems with coordination and movement.
  • The article emphasizes the need for a multidisciplinary approach to diagnose and manage the complex challenges associated with iSS effectively.
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  • * A 12-week exercise program was studied, showing that those who participated had a significant decrease in pulmonary capillary wedge pressure, indicating better heart performance during mild exercise compared to those who maintained their usual activity.
  • * Additional benefits were observed in the exercise group, including improved peak oxygen consumption, cardiac index, and overall quality of life, suggesting that physical training is effective for enhancing cardiac function and exercise capacity among these patients.
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Seaweeds (macroalgae) are an attractive resource for diverse microbial- and enzymatic production processes. They are abundant, underutilized, cheap, and rich in carbohydrates, and therefore have the potential to be used as a source of mono- or oligosaccharides, and as substrates for industrial fermentation processes. Many seaweed polysaccharides, including the sulfated polysaccharides ulvan and fucoidan, are however complex and heterogenous in structure, and there are currently few enzymes available to modify them, and understanding of their enzymatic depolymerization remains limited.

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Purpose: To assess the positive predictive value (PPV) of the diagnostic codes for hypertrophic cardiomyopathy (HCM) in the Danish National Patient Register (DNPR) and identify factors affecting the PPV.

Patients And Methods: We randomly sampled 200 patients registered in DNPR with the diagnostic codes DI421 (obstructive) or DI422 (non-obstructive) HCM, from Eastern Denmark, between December 1, 2017, and September 16, 2021. We assessed patients' medical records and classified whether the diagnosis of HCM was correct, incorrect, or uncertain according to the European Society of Cardiology (ESC) guidelines.

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Background: Given its complexity, childbirth can elicit both positive and negative psychological reactions and, in some cases, women may experience symptoms of childbirth-related post-traumatic stress disorder (CB-PTSD). Several risk factors for CB-PTSD have been identified previously, including history of mental health issues and childbirth related complications. The aim of our study was to explore the role of satisfaction with care in CB-PTSD symptoms.

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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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  • * A working group, including experts from the European Society of Cardiology, conducted a systematic review and reached consensus on mandatory (Level 1) and optional (Level 2) measures through a Delphi process.
  • * The final catalogue includes five Level 1 and two Level 2 outcome measures, along with five additional monitoring outcomes, which will enhance research quality and improve heart failure care.
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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 analyzed serum proteins in 5,127 older Icelandic adults to gain insights into the molecular processes of late-onset Alzheimer's disease (LOAD) over nearly 13 years.
  • Researchers identified 303 proteins linked to incident LOAD, with over 40% showing independent associations from the APOE-ε4 gene variant, indicating involvement in neuronal functions.
  • Four proteins were found to be downregulated by APOE-ε4 but upregulated in LOAD, suggesting they may reflect a biological response to the onset of the disease, highlighting dysregulated processes early in LOAD development.
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The evolution of laparoscopic liver surgery, originating in the 1990s, has been marked by significant advancements and milestones, overcoming initial technical hurdles and gaining widespread acceptance within the surgical community as a precise and safe alternative to open procedures. Along this journey, numerous challenges emerged, leading to the accumulation of evidence and the development of guidelines aimed at assisting surgeons in determining the safety, suitability, and complexity of laparoscopic liver resection. This chapter provides a thorough examination of key aspects of laparoscopic liver resection, including difficulty scoring systems, criteria for patient selection, technical considerations, outcomes across different types of liver lesions, and the innovative solutions developed to address challenges, thus offering a comprehensive overview of laparoscopic liver resection, and highlighting its evolving significance in modern hepatobiliary surgery.

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Although both short and long sleep duration are associated with elevated hypertension risk, our understanding of their interplay with biological pathways governing blood pressure remains limited. To address this, we carried out genome-wide cross-population gene-by-short-sleep and long-sleep duration interaction analyses for three blood pressure traits (systolic, diastolic, and pulse pressure) in 811,405 individuals from diverse population groups. We discover 22 novel gene-sleep duration interaction loci for blood pressure, mapped to 23 genes.

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Introduction: Here, we describe a rare case of a spinal arteriovenous fistula in a patient with known hereditary hemorrhagic telangiectasia (HHT) and spontaneous intraspinal hemorrhage. Furthermore, we provide a brief review of the literature on the formation of spinal arteriovenous malformations (AVM) in relation to this disease.

Case Presentation: The case involves a 54-year-old male with known HHT.

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  • This study investigates the impact of nicotine exposure during pregnancy, particularly from smokeless tobacco (snus) and cigarettes, on infant lung function in a cohort of 1,163 infants measured at 3 months old.
  • Results show that 10.3% of infants were exposed to nicotine in utero, with those exposed having a higher risk of lower lung function, indicated by an odds ratio of 1.63.
  • The findings suggest both smoking and snus use during pregnancy can adversely affect infant respiratory health, and this effect is not significantly different between male and female infants.
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Introduction: A large increase in new cancer cases is predicted worldwide, due to population growth, ageing and increased cancer risk. The age distribution of the Icelandic population is different from the other Nordic countries. The purpose of this study was to predict the number of new cancer cases in Iceland and other Nordic countries, and cancer survivors in Iceland, up to the year 2040.

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Alzheimer's disease (AD) is currently defined by the aggregation of amyloid-β (Aβ) and tau proteins in the brain. Although biofluid biomarkers are available to measure Aβ and tau pathology, few markers are available to measure the complex pathophysiology that is associated with these two cardinal neuropathologies. Here, we characterized the proteomic landscape of cerebrospinal fluid (CSF) changes associated with Aβ and tau pathology in 300 individuals using two different proteomic technologies-tandem mass tag mass spectrometry and SomaScan.

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Problematic low energy availability (LEA) is the underlying cause of relative energy deficiency in sport (REDs). Male specific etiology, as well as the duration and degree of LEA exposures resulting in REDs remain to be adequately described. The present study aimed to assess occurrences of LEA (energy availability [EA] <25 kcal/kg fat-free mass/day) in male athletes from various sports over 7 days.

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We examined the rate and nature of mitochondrial DNA (mtDNA) mutations in humans using sequence data from 64,806 contemporary Icelanders from 2,548 matrilines. Based on 116,663 mother-child transmissions, 8,199 mutations were detected, providing robust rate estimates by nucleotide type, functional impact, position, and different alleles at the same position. We thoroughly document the true extent of hypermutability in mtDNA, mainly affecting the control region but also some coding-region variants.

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