Viser treff 81-100 av 1154

    • Exploring differentially expressed genes of Staphylococcus aureus exposed to human tonsillar cells using RNA sequencing 

      Bastakoti, Srijana; Ajayi, Clement; Julin, Kjersti; Johannessen, Mona; Hanssen, Anne Merethe (Journal article; Tidsskriftartikkel, 2023-07-12)
      Background - The nose and the throat are the most predominant colonizing sites of Staphylococcus aureus, and colonization is a risk factor for infection. Nasal colonization is well described; however, we have limited knowledge about S. aureus throat colonization. The main objective of this study was to explore differentially expressed genes (DEGs) in S. aureus throat isolate TR145 exposed to human ...
    • Advanced methods and novel biomarkers in autoimmune diseases ‑ a review of the recent years progress in systemic lupus erythematosus 

      Fenton, Kristin Andreassen; Pedersen, Hege Lynum (Journal article; Tidsskriftartikkel, 2023-06-23)
      There are several autoimmune and rheumatic diseases affecting different organs of the human body. Multiple sclerosis (MS) mainly affects brain, rheumatoid arthritis (RA) mainly affects joints, Type 1 diabetes (T1D) mainly affects pancreas, Sjogren’s syndrome (SS) mainly affects salivary glands, while systemic lupus erythematosus (SLE) affects almost every organ of the body. Autoimmune diseases are ...
    • The use of traditional and unconventional culturing methods for the discovery of antimicrobial compounds derived from marine microorganisms 

      Brocklesby, Charlotte Kit Mun (Mastergradsoppgave; Master thesis, 2023-05-15)
      The main aim is to evaluate the content of marine biofilms and different marine bacteria for antimicrobial potential. Hypothesis: antimicrobial compounds can be produced in the presence of other bacterial species; in the context of Winogradsky columns that simulate a naturalistic environment, and in the proximity to other species in the case of marine bacterial isolates. For this main aim and ...
    • Diet-induced obese mouse hearts tolerate an acute high fatty acid exposure that also increases ischemic tolerance 

      Boardman, Neoma Tove; Pedersen, Tina Myhre; Rossvoll, Line; Hafstad, Anne Dragøy; Aasum, Ellen (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-09-03)
      An ischemic insult is accompanied by an acute increase in circulating fatty acid (FA) levels, which can induce adverse changes related to cardiac metabolism/energetics. Although chronic hyperlipidemia contributes to the pathogenesis of obesity-/diabetes-related cardiomyopathy, it is unclear how these hearts are affected by an acute high FA-load. We hypothesize that adaptation to chronic FA exposure ...
    • Within-patient and global evolutionary dynamics of Klebsiella pneumoniae ST17 

      Hetland, Marit; Hawkey, Jane; Bernhoff, Eva; Bakksjø, Ragna-Johanne; Kaspersen, Håkon; Rettedal, Siren; Sundsfjord, Arnfinn; Holt, Kathryn E.; Löhr, Iren Høyland (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-05-18)
      Klebsiella pneumoniae sequence type (ST) 17 is a global problem clone that causes multidrug-resistant (MDR) hospital infections worldwide. In 2008–2009, an outbreak of MDR ST17 occurred at a neonatal intensive care unit (NICU) in Stavanger, Norway. Fifty-seven children were colonized. We observed intestinal persistence of ST17 in all of the children for up to two years after hospital discharge. ...
    • Amphipathic barbiturates as marine product mimics with cytolytic and immunogenic effects on head and neck squamous cell carcinoma cell lines 

      von Hofsten, Susannah; Langer, Manuel K; Korelin, Katja; Norvoll Magnussen, Synnøve; Ausbacher, Dominik; Anderssen, Trude; Salo, Tuula; Strøm, Morten B.; Bayer, Annette; Al-Samadi, Ahmed; Berge, gerd (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-03-30)
      The incidence of head and neck squamous cell carcinoma (HNSCC) is increasing and the conventional treatments for this form of cancer can be tough. Despite the success of existing immunotherapies in some HNSCC patients, many do not respond to this type of treatment. Thus, the development of novel anti-cancer therapies should be prioritized. In the current study, the anticancer activity of a panel ...
    • SIRT1 - a new mammalian substrate of nuclear autophagy 

      Wang, Lu; Xu, Caiyue; Johansen, Terje; Berger, Shelley L.; Dou, Zhixun (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-12-20)
      Macroautophagic/autophagic degradation of nuclear components (or nuclear autophagy) is a poorly understood area in autophagy research. We previously reported the nuclear lamina protein LMNB1 (lamin B1) as a nuclear autophagy substrate in primary human cells, stimulating the investigation of nuclear autophagy in the mammalian system. We recently reported the sirtuin protein SIRT1 as a new selective ...
    • A highly selective purine-based inhibitor of CSF1R potently inhibits osteoclast differentiation 

      Aarhus, Thomas Ihle; Eickhoff, Jan; Klebl, Bert; Unger, Anke; Boros, Johanna; Choidas, Axel; Zischinsky, Mia-Lisa; Wolowczyk, Camilla Izabel; Bjørkøy, Geir; Sundby, Eirik; Hoff, Bård Helge (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-04-28)
      The colony-stimulating factor 1 receptor (CSF1R) plays an important role in the regulation of many inflammatory processes, and overexpression of the kinase is implicated in several disease states. Identifying selective, smallmolecule inhibitors of CSF1R may be a crucial step toward treating these disorders. Through modelling, synthesis, and a systematic structure-activity relationship study, we ...
    • SIRT1 is downregulated by autophagy in senescence and ageing 

      Xu, Caiyue; Wang, Lu; Fozouni, Parinaz; Evjen, Gry; Chandra, Vemika; Jiang, Jing; Lu, Congcong; Nicastri, Michael; Bretz, Corey; Winkler, Jeffrey D.; Amaravadi, Ravi; Garcia, Benjamin A.; Adams, Peter D.; Ott, Melanie; Tong, Wei; Johansen, Terje; Dou, Zhixun; Berger, Shelley L. (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-09-28)
      SIRT1 (Sir2) is an NAD<sup>+</sup>-dependent deacetylase that plays critical roles in a broad range of biological events, including metabolism, the immune response and ageing<sup>1,2,3,4,5</sup>. Although there is strong interest in stimulating SIRT1 catalytic activity, the homeostasis of SIRT1 at the protein level is poorly understood. Here we report that macroautophagy (hereafter referred to as ...
    • Nytt håp for voksne leukemipasienter 

      Arranz, Lorena; Juul, Kjersti (Chronicle; Kronikk, 2023-04-11)
      Norske forskere er i ferd med å utvikle en behandling som øker overlevelsen for voksne leukemipasienter.
    • Mikrobiologisk beredskap: Strategimøte nr 19, 2005 

      Lassen, Jørgen; Sandven, Per; Hjertland, Reidar; Mannsåker, Turid; Myrmel, Helge; Simonsen, Gunnar Skov (Research report; Forskningsrapport, 2005)
      Referansegruppen for programmet ”Eksterne kvalitetsvurderinger i bakteriologi, mykologi og parasittologi” arrangerte 04.11.2005 det 19. strategimøtet for programmets deltagere. Møtets tema var denne gangen ”Mikrobiologisk beredskap”.
    • TBK1 phosphorylation activates LIR-dependent degradation of the inflammation repressor TNIP1 

      Zhou, Jianwen; Rasmussen, Nikoline Lander; Olsvik, Hallvard Lauritz; Akimov, Vyacheslav; Hu, Zehan; Evjen, Gry; Kaeser-Pebernard, Stéphanie; Sankar, Devanarayanan Siva; Roubaty, Carole; Verlhac, Pauline; van de Beck, Nicole; Reggiori, Fulvio; Abudu, Yakubu Princely; Blagoev, Blagoy; Lamark, Trond; Johansen, Terje; Dengjel, Jörn (Journal article; Tidsskriftartikkel, 2022-12-27)
      Limitation of excessive inflammation due to selective degradation of pro-inflammatory proteins is one of the cytoprotective functions attributed to autophagy. In the current study, we highlight that selective autophagy also plays a vital role in promoting the establishment of a robust inflammatory response. Under inflammatory conditions, here TLR3-activation by poly(I:C) treatment, the inflammation ...
    • No Effect of Calanus Oil on Maximal Oxygen Uptake in Healthy Participants: A Randomized Controlled Study 

      Tauschek, Lucas Christian; Røsbjørgen, Ragnhild; Dalen, Håvard; Larsen, Terje; Karlsen, Trine (Journal article; Tidsskriftartikkel, 2022-08-23)
      We aimed to investigate the long-term effect of daily Calanus oil supplementation on maximal oxygen uptake (VO<sub>2</sub>max) in healthy 30- to 50-year-old participants. The study was motivated by preclinical studies reporting increased VO<sub>2</sub>max and metabolic health with omega-3 rich Calanus oil. In a double-blinded study, 71 participants were randomized to receive 2 g/day of Calanus or ...
    • High prevalence of Merkel cell polyomavirus is associated with dysregulation in transcript levels of TLR9 and type I IFNs in a large cohort of CF patients from the Italian (Lazio) reference center for cystic fibrosis 

      Bitossi, Camilla; Viscido, Agnese; Prezioso, Carla; Brazzini, Gabriele; Trancassini, Maria; Borrazzo, Cristian; Passerini, Sara; Frasca, Federica; Scordio, Mirko; Sorrentino, Leonardo; Oliveto, Giuseppe; Fracella, Matteo; D'Auria, Alessandra; Selvaggi, Carla; Cimino, Giuseppe; Midulla, Fabio; Pierangeli, Alessandra; Antonelli, Guido; Moens, Ugo Lionel; Pietropaolo, Valeria; Scagnolari, Carolina (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-07-13)
      Merkel cell polyomavirus (MCPyV) has been detected in respiratory specimens including those from Cystic Fibrosis (CF) patients, raising questions about its immunological and clinical relevance in the respiratory tract. MCPyV might promote an inappropriate antiviral response contributing to a chronic inflammatory response and resulting in detrimental effects in CF. Respiratory samples (n = 1138) were ...
    • Membrane Atg8ylation, stress granule formation, and MTOR regulation during lysosomal damage 

      Jia, Jingyue; Wang, Fulong; Bhujabal, Zambarlal Babanrao; Peters, Ryan; Mudd, Michal; Duque, Thabata; Allers, Lee; Javed, Ruheena; Salemi, Michelle; Behrends, Christian; Phinney, Brett; Johansen, Terje; Deretic, Vojo (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-11-29)
      The functions of mammalian Atg8 proteins (mATG8s) expand beyond canonical autophagy and include processes collectively referred to as Atg8ylation. Global modulation of protein synthesis under stress conditions is governed by MTOR and liquid-liquid phase separated condensates containing ribonucleoprotein particles known as stress granules (SGs). We report that lysosomal damage induces SGs acting as ...
    • Stress granules and mTOR are regulated by membrane atg8ylation during lysosomal damage 

      Jia, Jingyue; Wang, Fulong; Bhujabal, Zambarlal Babanrao; Peters, Ryan; Mudd, Michal; Duque, Thabata; Allers, Lee; Javed, Ruheena; Salemi, Michelle; Behrends, Christian; Phinney, Brett; Johansen, Terje; Deretic, Vojo (Journal article; Tidsskriftartikkel; Peer reviewed, 2022)
      We report that lysosomal damage is a hitherto unknown inducer of stress granule (SG) formation and that the process termed membrane atg8ylation coordinates SG formation with mTOR inactivation during lysosomal stress. SGs were induced by lysosomedamaging agents including SARS-CoV-2ORF3a, Mycobacterium tuberculosis, and proteopathic tau. During damage, mammalian ATG8s directly interacted with the ...
    • Transiently silent acquired antimicrobial resistance: an emerging challenge in susceptibility testing 

      Wagner, Theresa; Howden, Benjamin P; Sundsfjord, Arnfinn; Hegstad, Kristin (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-01-31)
      Acquisition and expression of antimicrobial resistance (AMR) mechanisms in bacteria are often associated with a fitness cost. Thus, evolutionary adaptation and fitness cost compensation may support the advance of subpopulations with a silent resistance phenotype when the antibiotic selection pressure is absent. However, reports are emerging on the transient nature of silent acquired AMR, describing ...
    • Proposal of selective inhibitor for bacterial zinc metalloprotease: Molecular mechanics and ab initio molecular orbital calculations 

      Imai, Kyohei; Saito, Rysouke; Ezawa, Takyua; Sugiyama, Satoshi; Sylte, Ingebrigt; Kurita, Noriyuki (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-10-11)
      The zinc metalloprotease pseudolysin (PLN) secreted from Pseudomonas aeruginosa degrades extracellular proteins to produce bacterial nutrition, and various types of PLN inhibitors have been developed to suppress the bacterial growth. However, as the structure of the ligand-binding pocket of PLN has large similarities to those of human matrix metalloproteinases (MMPs) and other human zinc metalloprotease, ...
    • Health and diseases of semi-domesticated reindeer in a climate change perspective 

      Tryland, Morten; Åhman, Birgitta; Sanchez Romano, Javier (Chapter; Bokkapittel, 2022-04-21)
      Climate change may affect reindeer herding and the health and disease of reindeer in several ways. One way of mitigating such changes is supplementary feeding, both in corrals and by bringing fodder to the animals on natural pastures. Feeding, when the right feed and feeding regime are used, may compensate for the loss of natural pastures and increase animal welfare. However, feeding may also cause ...
    • Impact of Resolvin D1 on the inflammatory phenotype of periodontal ligament cell response to hypoxia 

      Cai, Jiazheng; Liu, Jing; Yan, Jing; Lu, Xuexia; Wang, Xiaoli; Li, Si; Mustafa, Kamal Babikeir Elnour; Wang, Huihui; Xue, Ying; Mustafa, Manal; Kantarci, Alpdogan; Xing, Zhe (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-08-09)
      Objective - Periodontal ligament cells (PDLCs) are critical for wound healing and regenerative capacity of periodontal diseases. Within an inflammatory periodontal pocket, a hypoxic environment can aggravate periodontal inflammation, where PDLCs response to the inflammation would change. Resolvin D1 (RvD1) is an endogenous lipid mediator, which can impact intracellular inflammatory pathways of ...