Institutt for medisinsk biologi: Nye registreringer
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Data on RT-qPCR assay of nuclear progesterone receptors (nPR), membrane progesterone receptors (mPR) and progesterone receptor membrane components (PGRMC) from human uterine endometrial tissue and cancer cells of the uterine cervix
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-06-25)A previous investigation showed that the endometrium normalized in women with endometrial hyperplasia after three months treatment with high dose levonorgestrel IUS (intrauterine system). The effect was maintained even if immunohistochemical analyses of the endometrium showed that nuclear progesterone receptors (nPRs) were completely downregulated. These observations indicated that some type of ... -
Bicaudal D1 impairs autophagosome maturation in chronic obstructive pulmonary disease
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-09-26)Bicaudal D1 (BICD1), an adaptor for the dynein‐dynactin motor complex, has been identified as a susceptibility gene in chronic obstructive pulmonary disease (COPD). Autophagy, an essential cellular homeostasis process, is defective in COPD, in which oxidative stress‐induced misfolded proteins accumulate into toxic aggregates dependent on the accumulation of the autophagic cargo receptor p62. Defective ... -
From Differential Stains to Next Generation Physiology: Chemical Probes to Visualize Bacterial Cell Structure and Physiology
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-10-26)Chemical probes have been instrumental in microbiology since its birth as a discipline in the 19th century when chemical dyes were used to visualize structural features of bacterial cells for the first time. In this review article we will illustrate the evolving design of chemical probes in modern chemical biology and their diverse applications in bacterial imaging and phenotypic analysis. We will ... -
Nox4 regulates InsP3 receptor‐dependent Ca2+ release into mitochondria to promote cell survival
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-08-10)Cells subjected to environmental stresses undergo regulated cell death (RCD) when homeostatic programs fail to maintain viability. A major mechanism of RCD is the excessive calcium loading of mitochondria and consequent triggering of the mitochondrial permeability transition (mPT), which is especially important in post‐mitotic cells such as cardiomyocytes and neurons. Here, we show that stress‐induced ... -
The Effects of Metformin on Age-Related Changes in the Liver Sinusoidal Endothelial Cell
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-06-14)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 ... -
Olaparib monotherapy as primary treatment in unselected triple negative breast cancer
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-11-23)<p><i>Background - </i>The antitumor efficacy of PARP inhibitors (PARPi) for breast cancer patients harboring germline BRCA1/2 (gBRCA1/2) mutations is well established. While PARPi monotherapy was ineffective in patients with metastatic triple negative breast cancer (TNBC) wild type for BRCA1/2, we hypothesized that PARPi may be effective in primary TNBCs without previous chemotherapy exposure. < ... -
Alternative vanHAX promoters and increased vanA-plasmid copy number resurrect silenced glycopeptide resistance in Enterococcus faecium
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-12-26)<i>Background</i> - Vancomycin variable enterococci (VVE) are <i>van</i>-positive isolates with a susceptible phenotype that can convert to a resistant phenotype during vancomycin selection.<p> <p><i>Objectives</i> - To describe a vancomycin-susceptible <i>vanA</i>-PCR positive ST203 VVE <i>Enterococcus faecium</i> isolate (VVE<i>Swe</i>-S) from a liver transplantation patient in Sweden which ... -
Molecular Interactions Stabilizing the Promatrix Metalloprotease-9·Serglycin Heteromer
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-06-12)Previous studies have shown that THP-1 cells produced an SDS-stable and reduction-sensitive complex between proMMP-9 and a chondroitin sulfate proteoglycan (CSPG) core protein. The complex could be reconstituted in vitro using purified serglycin (SG) and proMMP-9 and contained no inter-disulfide bridges. It was suggested that the complex involved both the FnII module and HPX domain of proMMP-9. The ... -
Shotgun-Metagenomics on Positive Blood Culture Bottles Inoculated With Prosthetic Joint Tissue: A Proof of Concept Study
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-07-17)Clinical metagenomics is actively moving from research to clinical laboratories. It has the potential to change the microbial diagnosis of infectious diseases, especially when detection and identification of pathogens can be challenging, such as in prosthetic joint infection (PJI). The application of metagenomic sequencing to periprosthetic joint tissue (PJT) specimens is often challenged by low ... -
Regulation of Expression of Autophagy Genes by Atg8a-Interacting Partners Sequoia, YL-1, and Sir2 in Drosophila
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-05-26)Autophagy is the degradation of cytoplasmic material through the lysosomal pathway. One of the most studied autophagy-related proteins is LC3. Despite growing evidence that LC3 is enriched in the nucleus, its nuclear role is poorly understood. Here, we show that <i>Drosophila</i> Atg8a protein, homologous to mammalian LC3, interacts with the transcription factor Sequoia in a LIR motif-dependent ... -
Structural Analysis of Merkel Cell Polyomavirus (MCPyV) Viral Capsid Protein (VP1) in HIV-1 Infected Individuals
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-10-27)Merkel cell polyomavirus (MCPyV) viral protein 1 (VP1) is the capsid protein that mediates virus attachment to host cell receptors and is the major immune target. Given the limited data on MCPyV VP1 mutations, the VP1 genetic variability was examined in 100 plasma and 100 urine samples from 100 HIV+ individuals. Sequencing of VP1 DNA in 17 urine and 17 plasma specimens, simultaneously MCPyV DNA ... -
Resistance to ventricular fibrillation predicted by the QRS/QTc - ratio in an intact rat model of hypothermia/rewarming
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-01-04)Accidental hypothermia is associated with increased risk for arrhythmias. QRS/QTc is proposed as an ECG-marker, where decreasing values predict hypothermia-induced ventricular arrhythmias. If reliable it should also predict nonappearance of arrhythmias, observed in species like rat that regularly tolerate prolonged hypothermia.<p> <p>A rat model designed for studying cardiovascular function during ... -
Strategies to develop a prophylaxis for the prevention of HPA-1a immunization and fetal and neonatal alloimmune thrombocytopenia
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-12-31)Anti-HPA-1a-antibodies are the main cause of fetal and neonatal alloimmune thrombocytopenia (FNAIT) which may result in intracranial hemorrhage (ICH) and death among fetuses and newborns. Advances in understanding the pathogenesis of FNAIT and proof of concept for prophylaxis to prevent immunization suggest that development of hyperimmune anti-HPA-1a IgG aimed at preventing immunization against ... -
Antibiotic sensitivity screening of Klebsiella spp. and Raoultella spp. isolated from marine bivalve molluscs reveal presence of CTX-M-producing K. pneumoniae
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-11-30)<i>Klebsiella</i> spp. are a major cause of both nosocomial and community acquired infections, with <i>K. pneumoniae</i> being responsible for most human infections. Although <i>Klebsiella</i> spp. are present in a variety of environments, their distribution in the sea and the associated antibiotic resistance is largely unknown. In order to examine prevalence of <i>K. pneumoniae</i> and related ... -
Modulation of Plasma Membrane Composition and Microdomain Organization Impairs Heat Shock Protein Expression in B16-F10 Mouse Melanoma Cells
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-04-12)The heat shock response (HSR) regulates induction of stress/heat shock proteins (HSPs) to preserve proteostasis during cellular stress. Earlier, our group established that the plasma membrane (PM) acts as a sensor and regulator of HSR through changes in its microdomain organization. PM microdomains such as lipid rafts, dynamic nanoscale assemblies enriched in cholesterol and sphingomyelin, and ... -
Merkel cell polyomavirus and non-Merkel cell carcinomas: Guilty or circumstantial evidence?
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-01-28)Merkel cell polyomavirus (MCPyV) is the major causative factor of the rare but aggressive cancer, Merkel cell carcinoma (MCC). Two characteristics of MCPyV‐positive MCCs are integration of the viral genome and expression of a truncated version of one of its oncogenic proteins, namely large T antigen. The strong association of MCPyV with MCC development has incited researchers to further investigate ... -
Autoimmunity and SLE: Factual and Semantic Evidence-Based Critical Analyses of Definitions, Etiology, and Pathogenesis
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-10-06)One cannot discuss anti-dsDNA antibodies and lupus nephritis without discussing the nature of Systemic lupus erythematosus (SLE). SLE is insistently described as a prototype autoimmune syndrome, with anti-dsDNA antibodies as a central biomarker and a pathogenic factor. The two entities, “SLE” and “The Anti-dsDNA Antibody,” have been linked in previous and contemporary studies although serious criticism ... -
Evaluation Challenges in the validation of B7-H3 as oral tongue cancer prognosticator
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-09-21)B7-H3 was the only molecule identified with prognostic potential from a recent systematic review of the prognostic value of immune checkpoints in oral cancer. We aimed to validate this finding in a multicenter international cohort. We retrospectively retrieved 323 oral tongue squamous cell carcinoma (OTSCC) samples from three different countries (Brazil, Finland, and Norway) for immunostaining and ... -
ATAD3 proteins in autophagy. Do ATAD3 proteins have a direct role in regulating autophagy
(Master thesis; Mastergradsoppgave, 2020-05-22)ATPase Family AAA Domain -containing protein 3 (ATAD3) is a nuclear-encoded mitochondrial transmembrane protein encompassing three isoforms; ATAD3A, ATAD3B and ATAD3C. ATAD3 is involved in several cellular process and available data predict that ATAD3A and ATAD3B proteins may have potential roles in regulating autophagy and mitophagy. Preliminary data from our research group identified interactions ... -
A study of TRIM32 self-ubiquitination
(Master thesis; Mastergradsoppgave, 2020-05-15)TRIMs (tripartite motif proteins) constitute a family of ubiquitin E3 ligases that are involved in a variety of cellular processes including autophagy and carcinogenesis. TRIM32 contains an N-terminal RING finger domain, B-box region, a coiled-coil domain and six NHL repeats in the C-terminal region, which are involved in protein dimerization and substrate recognitions. Various mutations in the NHL ...