Publications by authors named "Hedman A"

Background: Underlying immunological mechanisms in children with moderate-to-severe asthma are complex and unclear. We aimed to investigate the association between blood inflammatory parameters and asthma burden in children with moderate-to-severe asthma.

Methods: Blood inflammatory parameters (eosinophil and neutrophil counts and inflammatory mediators using multiplex immunoassay technology) were measured in children (6-17 years) with moderate-to-severe asthma from the SysPharmPediA cohort across four European countries.

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Background: Impaired pulmonary function carries significant risks for lung, cardiovascular, and metabolic disorders.

Research Question: Can circulating protein biomarkers of pulmonary function provide insight into the pathophysiologic features of lung function impairment and links to comorbidities?.

Study Design And Methods: We analyzed plasma levels of 2,922 proteins in 32,493 UK Biobank participants (53% female; mean [SD] age, 57 [8] years) to investigate their associations with spirometry measures of lung function (FEV, FVC, FEV to FVC ratio), and with obstructive (n = 4,713) and restrictive (n = 3,886) spirometry patterns.

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Objective: Interstitial lung disease (ILD) is an important cause of mortality in patients with rheumatoid arthritis (RA). Early RA-ILD detection is essential to improve prognosis. Here, we investigated eight serological biomarkers that may contribute to RA-ILD detection.

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  • Monozygotic (MZ) twins, typically considered genetically identical, actually can have differing DNA variants due to early post-zygotic events, which may relate to differences in disease manifestation.
  • In a study involving whole genome sequencing of 17 pairs of MZ twins discordant for psychotic disorders, researchers found rare genetic variants unique to affected individuals, including specific genes linked to schizophrenia and bipolar disorder.
  • The research identified significant genetic variations, such as deleterious missense variants and rare genic copy number variants (CNVs), suggesting a potential link to the disorders, and emphasizes the need for further investigation in this area.
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  • Researchers studied proteins in the blood to understand how they relate to prostate cancer risk.
  • They found 20 proteins connected to different types of prostate cancer, including aggressive and early onset forms.
  • One protein, MSMB, was especially important because it helped tell the difference between normal tissue and cancerous tissue.
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  • * Our research uncovered 40 proteins linked to cancer risks, including PLAUR for breast cancer and CTRB1 for pancreatic cancer, while also noting possible negative side effects like hypertension from altering these proteins.
  • * We found 18 proteins that are associated with cancer risk and linked to existing drugs, plus 15 proteins not yet being studied for clinical use, enhancing our understanding of cancer causes and the implications of targeting these proteins for prevention.
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  • Early identification of poorly controlled asthma in children is crucial for improving treatment methods, and analyzing exhaled volatile organic compounds (VOCs) shows promise for this task.
  • A study evaluated the effectiveness of gas chromatography-mass spectrometry to distinguish between controlled and uncontrolled pediatric asthma, using data from multiple research phases.
  • Key findings revealed that specific VOCs, such as acetophenone and ethylbenzene, could differentiate asthma control levels, achieving strong accuracy in predicting outcomes based on the collected data from 196 children.
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Background: Pulmonary embolism (PE) is the leading cause of in-hospital death and the third most frequent cause of cardiovascular death. The clinical presentation of PE is variable, and choosing the appropriate treatment for individual patients can be challenging.

Case Summary: A 64-year-old man presented to hospital with acute chest pain, shortness of breath, and pulmonary oedema.

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Background: Maternal psychological stress during pregnancy and postnatally has been shown to be associated with offspring atopic diseases (asthma, atopic dermatitis and allergic rhinitis). The aim of this study was to assess whether this association may be attributable to the child's own mental health disorders.

Method: The study population included 15,092 twin children born 2002-2010 in Sweden.

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Objective: Current breast cancer risk prediction scores and algorithms can potentially be further improved by including molecular markers. To this end, we studied the association of circulating plasma proteins using Proximity Extension Assay (PEA) with incident breast cancer risk.

Subjects: In this study, we included 1577 women participating in the prospective KARMA mammographic screening cohort.

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Biomarkers for early detection of breast cancer may complement population screening approaches to enable earlier and more precise treatment. The blood proteome is an important source for biomarker discovery but so far, few proteins have been identified with breast cancer risk. Here, we measure 2929 unique proteins in plasma from 598 women selected from the Karolinska Mammography Project to explore the association between protein levels, clinical characteristics, and gene variants, and to identify proteins with a causal role in breast cancer.

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  • Hyperemesis gravidarum, affecting 0.3%-3% of pregnant women, is a leading cause of early pregnancy hospitalizations, with an urgent need for updated treatment reviews since no systematic review has been completed since 2016.
  • A comprehensive search of multiple medical databases identified studies on various interventions, focusing on outcomes like nausea, vomiting, and quality of life, with risk assessments performed by two authors.
  • The review included 25 studies but revealed low to very low certainty of evidence for most treatments, with only acupressure alongside standard care suggesting a moderate improvement in nausea and vomiting symptoms.
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  • The Pharma Proteomics Project is a large-scale research initiative analyzing blood protein profiles from over 54,000 UK Biobank participants to understand links between genetics and health.
  • The project identifies significant genetic associations with proteins, revealing many novel interactions and highlighting ancestry-specific variations, along with insights into disease mechanisms and potential drug targets.
  • By making their findings publicly accessible, the consortium aims to advance research in biomarker development and therapeutic strategies, enhancing our understanding of how genetic factors influence health outcomes.
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Background: Understanding the role of circulating proteins in prostate cancer risk can reveal key biological pathways and identify novel targets for cancer prevention.

Methods: We investigated the association of 2,002 genetically predicted circulating protein levels with risk of prostate cancer overall, and of aggressive and early onset disease, using -pQTL Mendelian randomization (MR) and colocalization. Findings for proteins with support from both MR, after correction for multiple-testing, and colocalization were replicated using two independent cancer GWAS, one of European and one of African ancestry.

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Circulating proteins have important functions in inflammation and a broad range of diseases. To identify genetic influences on inflammation-related proteins, we conducted a genome-wide protein quantitative trait locus (pQTL) study of 91 plasma proteins measured using the Olink Target platform in 14,824 participants. We identified 180 pQTLs (59 cis, 121 trans).

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Objective: We aimed to compare long-term outcomes in intensive care unit (ICU) survivors between the first and second/third waves of the COVID-19 pandemic. More specifically, to assess health-related quality of life (HRQL) and respiratory health 6 months post-ICU and to study potential associations between patient characteristic and treatment variables regarding 6-month outcomes.

Design: Prospective cohort study.

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Rheumatoid arthritis (RA) is an autoimmune disease characterized by systemic inflammation and is mediated by multiple immune cell types. In this work, we aimed to determine the relevance of changes in cell proportions in peripheral blood mononuclear cells (PBMCs) during the development of disease and following treatment. Samples from healthy blood donors, newly diagnosed RA patients, and established RA patients that had an inadequate response to MTX and were about to start tumor necrosis factor inhibitors (TNFi) treatment were collected before and after 3 months of treatment.

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Aging is classically conceptualized as an ever-increasing trajectory of damage accumulation and loss of function, leading to increases in morbidity and mortality. However, recent in vitro studies have raised the possibility of age reversal. Here, we report that biological age is fluid and exhibits rapid changes in both directions.

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The scaffold protein IQGAP1 assembles multiprotein signaling complexes to influence biological functions. Cell surface receptors, particularly receptor tyrosine kinases and G-protein coupled receptors, are common IQGAP1 binding partners. Interactions with IQGAP1 modulate receptor expression, activation, and/or trafficking.

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  • * Researchers analyzed blood samples from 121 children with moderate-to-severe asthma to find DNAm markers linked to BDR and FeNO, using regression models to ensure accuracy while controlling for variables like age and sex.
  • * They identified specific DNA markers and differential regions related to FeNO and BDR, with findings indicating associations with allergic reactions and inflammation, potentially opening avenues for better understanding and management of asthma in pediatric patients.
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  • Population isolates like Finland provide a unique advantage for genetic research by having concentrated deleterious alleles in low-frequency variants due to historical bottlenecks.
  • The FinnGen study aims to analyze data from 500,000 Finnish individuals, focusing on their genomes and health records, particularly as many participants are older and have disease-related data.
  • From the analysis of 224,737 participants and additional biobank data, researchers discovered 30 new associations and a total of 2,733 significant genetic links across various diseases, highlighting the importance of low-frequency variants in understanding common diseases.
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  • Uncontrolled pediatric asthma significantly affects children and their caregivers, highlighting the need for deeper understanding of its determinants through the SysPharmPediA study.
  • The study enrolled 145 children (ages 6-17) with moderate to severe asthma from multiple countries and analyzed factors like treatment regimens, medication adherence, and lung function to assess uncontrolled vs. controlled asthma.
  • Results showed children on higher treatment steps had more uncontrolled asthma, and while they had a greater lung function response to salbutamol, medication adherence and inhaler technique did not differ significantly between the two groups—suggesting other factors might contribute to uncontrolled asthma risk.
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