Publications by authors named "Clausen F"

Background: In 2010, Denmark was the first country to implement a targeted routine antenatal anti-D prophylaxis (tRAADP) program, offering fetal RHD genotyping to all nonimmunized D negative pregnant women. The program represented a shift from only postnatal prophylaxis to a combined antenatal and postnatal prophylaxis. This study aimed to evaluate the clinical effect of tRAADP in Denmark.

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Traumatic brain injury (TBI) is a major cause of morbidity and mortality, not least in the elderly. The incidence of aged TBI patients has increased dramatically during the last decades. High age is a highly negative prognostic factor in TBI, and pharmacological treatment options are lacking.

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Article Synopsis
  • Pancreatic ductal adenocarcinoma (PDAC) is a highly lethal cancer, and neutrophils may have conflicting roles in tumor progression, acting both for and against tumors.
  • CD71, the transferrin receptor 1, is crucial for iron uptake and is notably increased in activated immune cells and solid cancers, though its role in neutrophils related to PDAC is not well understood.
  • The study found that PDAC patients had significantly higher CD71 expression on neutrophils, which correlated with worse outcomes and increased inflammatory markers, suggesting CD71's involvement in tumor progression and highlighting the need for further research on its clinical implications.
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Introduction: Traumatic brain injury to thalamo-cortical pathways is associated with posttraumatic morbidity. Diffuse mechanical forces to white matter tracts and deep grey matter regions induce an inflammatory response and vascular damage resulting in progressive neurodegeneration. Pro-inflammatory cytokines, including interleukin-1β (IL-1β), may contribute to the link between inflammation and the injured capillary network after TBI.

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In pregnancy, D- pregnant women may be at risk of becoming immunized against D when carrying a D+ fetus, which may eventually lead to hemolytic disease of the fetus and newborn. Administrating antenatal and postnatal anti-D immunoglobulin prophylaxis decreases the risk of immunization substantially. Noninvasive fetal genotyping, based on testing cell-free DNA extracted from maternal plasma, offers a reliable tool to predict the fetal RhD phenotype during pregnancy.

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Noninvasive fetal blood group antigen genotyping serves as a diagnostic tool to predict the risk of hemolytic disease of the fetus and newborn in pregnancies of immunized women. In addition, fetal RHD genotyping is used as an antenatal screening to guide targeted use of immunoglobulin prophylaxis in non-immunized RhD negative, pregnant women. Based on testing of cell-free DNA extracted from maternal plasma, these noninvasive assays demonstrate high performance accuracies.

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Alkyl boronic esters are highly valuable compounds in organic chemistry and related fields due to their good stability and highly versatile reactivity. In this edge article, stereoselective borylative couplings of vinyl iodides with various nucleophiles, alkenes or alkynes is reported. These coupling reactions proceed through stereospecific hydroboration and subsequent stereospecific 1,2-metallate rearrangement.

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Senescence is a negative prognostic factor for outcome and recovery following traumatic brain injury (TBI). TBI-induced white matter injury may be partially due to oligodendrocyte demise. We hypothesized that the regenerative capacity of oligodendrocyte precursor cells (OPCs) declines with age.

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  • RH1 incompatibility can lead to hemolytic disease in newborns, prompting Switzerland to recommend fetal genotyping from maternal blood starting at 18 weeks gestation since 2020.
  • This method allows for the targeted administration of RH immunoglobulin (RHIG) specifically to RH1 negative women expecting RH1 positive fetuses.
  • Data from 30 months of noninvasive fetal screening showed valid results from 7072 samples, helping to avoid unnecessary RHIG treatments for over one-third of RH1 negative pregnant women, thus enhancing safety and conserving medical resources.
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The prevailing concept is that gestational alloimmune liver disease (GALD) is caused by maternal antibodies targeting a currently unknown antigen on the liver of the fetus. This leads to deposition of complement on the fetal hepatocytes and death of the fetal hepatocytes and extensive liver injury. In many cases, the newborn dies.

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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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Background And Objectives: For 5 years, routine genotyping has been performed for selected blood groups of blood donors in the Copenhagen Capital Region, Denmark. The result is summarized in the following.

Materials And Methods: Genotyping was carried out by an external service provider using the competitive allele specific PCR (KASP) technology.

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Background: Susceptibility to severe acute respiratory syndrome coronavirus 2 shows individual variability in un-vaccinated and previously un-exposed individuals. We investigated the impact of ABO blood group, titers of anti-A and anti-B, other blood group antigens, and the extracellular deposition of ABH antigens as controlled by secretor fucosyltransferase 2 (FUT2) status.

Study Design And Methods: We studied incidents in three different hospitals between April to September 2020, where un-diagnosed coronavirus disease 2019 (COVID-19) patients were cared for by health care workers without use of personal protection and with close contact while delivering therapy.

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Background And Objectives: Identification of antibody characteristics and genetics underlying the development of maternal anti-A/B linked to inducing haemolytic disease of the foetus and newborn could contribute to the development of screening methods predicting pregnancies at risk with high diagnostic accuracy.

Materials And Methods: We examined 73 samples from mothers to 37 newborns with haemolysis (cases) and 36 without (controls). The secretor status was determined by genotyping a single nucleotide polymorphism in FUT2, rs601338 (c.

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In solid organ transplantation, donor-derived cell-free DNA (dd-cfDNA) is a promising universal noninvasive biomarker for allograft health, where high levels of dd-cfDNA indicate organ damage. Using Droplet Digital PCR (ddPCR), we aimed to develop an assay setup for monitoring organ health. We aimed to identify the least distinguishable percentage-point increase in the fraction of minute amounts of cfDNA in a large cfDNA background by using assays targeting single nucleotide polymorphisms (SNPs).

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Cerebral protein profiling in traumatic brain injury (TBI) is needed to better comprehend secondary injury pathways. Cerebral microdialysis (CMD), in combination with the proximity extension assay (PEA) technique, has great potential in this field. By using PEA, we have previously screened >500 proteins from CMD samples collected from TBI patients.

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Purpose: Previous studies have shown that intracorporeal anastomosis (ICA) in minimally invasive right colectomy may improve postoperative recovery compared with extracorporeal anastomosis (ECA). It has been hypothesized that creating the anastomosis extracorporeally may cause mesenteric traction and compromised intestinal perfusion. The purpose of this study was to investigate the effect of either ICA or ECA on intestinal perfusion.

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Article Synopsis
  • - The Kell blood group system's K and k antigens are crucial, as maternal anti-K antibodies can threaten K-positive fetuses, making early prenatal K status prediction essential for pregnancy management.
  • - Researchers collected blood samples from 43 immunized women to analyze the fetal K status using PCR amplification and next-generation sequencing (NGS), achieving accurate predictions aligned with postnatal K serology.
  • - The developed NGS-based assay successfully predicts fetal K status non-invasively, allowing for timely interventions to prevent hemolytic disease in pregnancies affected by maternal anti-K antibodies.
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Background And Objectives: Under the ISBT, the Working Party (WP) for Red Cell Immunogenetics and Blood Group Terminology is charged with ratifying blood group systems, antigens and alleles. This report presents the outcomes from four WP business meetings, one located in Basel in 2019 and three held as virtual meetings during the COVID-19 pandemic in 2020 and 2021.

Materials And Methods: As in previous meetings, matters pertaining to blood group antigen nomenclature were discussed.

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  • Cerebellar dysfunction is frequently observed after traumatic brain injury (TBI) due to indirect effects on cerebellar pathways rather than direct impact.
  • Research using a mouse model revealed that TBI leads to early loss of Purkinje cells and changes in synapse size and neurofilament levels, indicating significant cellular damage.
  • The study found that TBI disrupts cortico-cerebellar circuits, leading to poor motor performance, highlighting potential long-range mechanisms behind cerebellar injury post-TBI.
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Background: The standard operation for mid- and low rectal cancer total mesorectal excision (TME) is routinely performed as minimally invasive surgery. TME is associated with temporary or permanent functional impairment of pelvic organs, causing reduced quality of life (QoL). Concerns have been raised that the newest minimally invasive approach, transanal TME (TaTME), may further reduce urogenital and anorectal functions.

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Inborn hemolytic anemia requiring frequent blood transfusions can be a life-threatening disease. Treatment, besides blood transfusion, includes iron chelation for prevention of iron accumulation due to frequent blood transfusions. We present the results of a clinical investigation where the proband was diagnosed with severe hemolytic anemia of unknown origin soon after birth.

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Objective: To determine if minimally invasive right colectomy with intra-corporeal anastomosis improves postoperative recovery compared to extra-corporeal anastomosis.

Background: Previous trials have shown that intracorporeal anastomosis improves postoperative recovery; however, it has not yet been evaluated in a setting with optimized perioperative care or with patient-related outcome measures.

Methods: This was a multicenter, triple-blind, randomized clinical trial at two high-volume colorectal centers with strict adherence to optimized perioperative care pathways.

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Cerebellar dysfunction after traumatic brain injury (TBI) is commonly suspected based on clinical symptoms, although cerebellar pathology has rarely been investigated. To address the hypothesis that the cerebellar axon-myelin unit is altered by diffuse TBI, we used the central fluid percussion injury (cFPI) model in adult mice to create widespread axonal injury by delivering the impact to the forebrain. We specifically focused on changes in myelin components (myelin basic protein [MBP], 2',3'-cyclic nucleotide 3'-phosphodiesterase [CNPase], nodal/paranodal domains [neurofascin (Nfasc), ankyrin-G], and phosphorylated neurofilaments [SMI-31, SMI-312]) in the cerebellum, remote from the impact, at two, seven, and 30 days post-injury (dpi).

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