Artikler, rapporter og annet (medisinsk biologi): Recent submissions
Now showing items 421-440 of 1105
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Murine models for studying treatment, prevention and pathogenesis of FNAIT
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-12-31)Maternal alloimmunization to paternally inherited antigens on fetal/neonatal platelets can cause fetal/neonatal alloimmune thrombocytopenia (FNAIT) after antibody-mediated removal of platelets from the fetal circulation. The complications vary from mild bleeding symptoms to severe intracranial hemorrhage and subsequent neurological impairment or death. Studies on <i>in vivo</i> mechanisms are ... -
Efficacy of mecillinam against clinical multidrug-resistant Escherichia coli in a murine urinary tract infection model
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-11-23)Pivmecillinam, a pro-drug of mecillinam, has been used extensively in Scandinavia for the treatment of acute lower urinary tract infections (UTIs) caused by Enterobacterales. It is still an attractive first-line drug for the empirical treatment of UTIs owing to the low prevalence of resistance as well as its favourable impact on the intestinal microbiota as a pro-drug and good in vitro efficacy ... -
Microbial risk factors for treatment failure of pivmecillinam in community‐acquired urinary tract infections caused by ESBL‐producing Escherichia coli
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-11-22)The aim of this study was to identify microbial risk factors for treatment failure of pivmecillinam in community‐acquired urinary tract infections (ca‐UTIs) caused by ESBL‐producing Escherichia coli. Eighty‐nine ESBL‐producing E. coli isolated from women suffering from ca‐UTIs were included. The susceptibilities to mecillinam were determined using MIC gradient strip. Whole genome sequencing was ... -
Inflammatory serum markers and risk and severity of prostate cancer: The PROCA‐life study
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-10-03)Whether chronic inflammation mirrored by high levels of systemic inflammatory markers such as high sensitive‐CRP (hs‐CRP) and white blood cell count (WBC) are associated with prostate cancer development remains unclear. In the Prostate Cancer Study throughout Life (PROCA‐<i>life</i>), a prospective population‐based cohort study, 7,356 men were included. Prediagnostic WBC and hs‐CRP were assessed ... -
Altered mitochondrial metabolism in the insulin-resistant heart
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-12-16)Obesity‐induced insulin resistance and type 2 diabetes mellitus can ultimately result in various complications, including diabetic cardiomyopathy. In this case, cardiac dysfunction is characterized by metabolic disturbances such as impaired glucose oxidation and an increased reliance on fatty acid (FA) oxidation. Mitochondrial dysfunction has often been associated with the altered metabolic function ... -
MCPyV Large T antigen induced atonal homolog 1 (ATOH1) is a lineage-dependency oncogene in Merkel cell carcinoma.
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-07-07)Despite the fact that the transcription factor ATOH1 is a master regulator of Merkel cell development, its role in Merkel cell carcinoma (MCC) carcinogenesis remains controversial. Here, we provide several lines of evidence that ATOH1 is a lineage-dependent oncogene in MCC. Luciferase assays revealed binding of ATOH1 and subsequent activation to the promoter of miR-375, which is one of the most ... -
Liver sinusoidal endothelial cells contribute to the uptake and degradation of entero bacterial viruses
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-01-21)The liver is constantly exposed to dietary antigens, viruses, and bacterial products with inflammatory potential. For decades cellular uptake of virus has been studied in connection with infection, while the few studies designed to look into clearance mechanisms focused mainly on the role of macrophages. In recent years, attention has been directed towards the liver sinusoidal endothelial cells ... -
NIPSNAP1 and NIPSNAP2 Act as “Eat Me” Signals for Mitophagy
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-04-11)The clearance of damaged or dysfunctional mitochondria by selective autophagy (mitophagy) is important for cellular homeostasis and prevention of disease. Our understanding of the mitochondrial signals that trigger their recognition and targeting by mitophagy is limited. Here, we show that the mitochondrial matrix proteins 4-Nitrophenylphosphatase domain and non-neuronal SNAP25-like protein homolog ... -
Combined Therapy With Dobutamine and Omecamtiv Mecarbil in Pigs With Ischemic Acute Heart Failure Is Attributed to the Effect of Dobutamine
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-10-23)Inotropic support in ischemic acute heart failure (AHF) is controversial. We tested a therapeutic principle for AHF by combining a low dose of omecamtiv mecarbil (OM; 0.25 mg/kg bolus plus 0.25 mg/kg/h) with a low dose of dobutamine (Dobut; 1.25 µg/kg/min). In 10 pigs subjected to myocardial ischemia by left coronary microembolization, this cotreatment increased cardiac power (CP) from 0.48 ± 0.14 ... -
Nrf2 and SQSTM1/p62 jointly contribute to mesenchymal transition and invasion in glioblastoma
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-08-23)Accumulating evidence suggests that constitutively active Nrf2 has a pivotal role in cancer as it induces pro-survival genes that promote cancer cell proliferation and chemoresistance. The mechanisms of Nrf2 dysregulation and functions in cancer have not been fully characterized. Here, we jointly analyzed the Broad-Novartis Cancer Cell Line Encyclopedia (CCLE) and the Cancer Genome Atlas (TCGA) ... -
TAK1 converts Sequestosome 1/p62 from an autophagy receptor to a signaling platform
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-07-25)The protein p62/Sequestosome 1 (p62) has been described as a selective autophagy receptor and independently as a platform for pro‐inflammatory and other intracellular signaling. How these seemingly disparate functional roles of p62 are coordinated has not been resolved. Here, we show that TAK1, a kinase involved in immune signaling, negatively regulates p62 action in autophagy. TAK1 reduces p62 ... -
Selective Autophagy: RNA Comes from the Vault to Regulate p62/SQSTM1
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-04-22)A new study shows that the oligomerization of p62/Sequestosome-1 (SQSTM1) — a selective autophagy receptor and signaling adapter — is regulated directly by vault RNA. This riboregulation negatively affects the aggregation state of p62 and thereby its autophagic degradation and its role as a selective autophagy receptor. -
Selective Autophagy: ATG8 Family Proteins, LIR Motifs and Cargo Receptors
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-07-13)Selective autophagy relies on soluble or membrane-bound cargo receptors that recognize cargo and bring about autophagosome formation at the cargo. The cargo-bound receptors interact with lipidated ATG8 family proteins anchored in the membrane at the concave side of the forming autophagosome. The interaction is mediated by 15- to 20-amino-acid-long sequence motifs called LC3-interacting region (LIR) ... -
Mammalian Atg8 proteins regulate lysosome and autolysosome biogenesis through SNAREs
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-10-18)Mammalian homologs of yeast Atg8 protein (mAtg8s) are important in autophagy, but their exact mode of action remains ill‐defined. Syntaxin 17 (Stx17), a SNARE with major roles in autophagy, was recently shown to bind mAtg8s. Here, we identified LC3‐interacting regions (LIRs) in several SNAREs that broaden the landscape of the mAtg8‐SNARE interactions. We found that Syntaxin 16 (Stx16) and its cognate ... -
The effects of metformin on age-related changes in the liver sinusoidal endothelial cell
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-06-14)Age-related changes in the liver sinusoidal endothelium, particularly the reduction in fenestrations, contribute to insulin resistance in old age. Metformin impacts on the aging process and improves insulin resistance. Therefore, the effects of metformin on the liver sinusoidal endothelium were studied. Metformin increased fenestrations in liver sinusoidal endothelial cells isolated from both young ... -
Use of Peptide Arrays for Identification and Characterization of LIR Motifs
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-01-05)The mammalian ATG8 proteins (LC3A-C/GABARAP, GABARAPL1, and GABARAPL2) are small ubiquitin-like proteins critically involved in macroautophagy. Their processed C-termini are posttranslationally conjugated to a phosphatidylethanolamine moiety, enabling their insertion into the lipid bilayers of both the inner and outer membranes of the forming autophagosomes. The ATG8s bind a diverse selection of ... -
Phosphorylation of Syntaxin 17 by TBK1 Controls Autophagy Initiation
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-02-28)Syntaxin 17 (Stx17) has been implicated in autophagosome-lysosome fusion. Here, we report that Stx17 functions in assembly of protein complexes during autophagy initiation. Stx17 is phosphorylated by TBK1 whereby phospho-Stx17 controls the formation of the ATG13<sup>+</sup>FIP200<sup>+</sup> mammalian pre-autophagosomal structure (mPAS) in response to induction of autophagy. TBK1 phosphorylates Stx17 ... -
Design, synthesis and biological evaluation of 6‐substituted quinolines derived from cabozantinib as c‐Met inhibitors
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-08-15)Based on the cabozantinib scaffold, novel c‐Met inhibitors were rationalized from the limited knowledge of structure‐activity relationships for the quinoline 6‐position. Emphasis was given to modifications capable of engaging in additional polar interactions with the c‐Met active site. In addition, <i>ortho</i>‐fluorinations of the terminal benzene ring were explored. Fifteen new molecules were ... -
Strong correlation between the rates of intrinsically antibiotic-resistant species and the rates of acquired resistance in Gram-negative species causing bacteraemia, EU/EEA, 2016
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-08-15)<i>Background</i> - Antibiotic resistance, either intrinsic or acquired, is a major obstacle for treating bacterial infections.<p><p> <i>Aim</i> - Our objective was to compare the country-specific species distribution of the four Gram-negative species <i>Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa</i> and <i>Acinetobacter</i> species and the proportions of selected acquired ... -
Attributable deaths and disability-adjusted life-years caused by infections with antibiotic-resistant bacteria in the EU and the European Economic Area in 2015: a population-level modelling analysis
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018-11-05)<i>Background</i> - Infections due to antibiotic-resistant bacteria are threatening modern health care. However, estimating their incidence, complications, and attributable mortality is challenging. We aimed to estimate the burden of infections caused by antibiotic-resistant bacteria of public health concern in countries of the EU and European Economic Area (EEA) in 2015, measured in number of ...