Blar i forfatter "Johannessen, Mona"

Viser treff 21-31 av 31

    • Multifunctional Nanofibrous Dressing with Antimicrobial and Anti-Inflammatory Properties Prepared by Needle-Free Electrospinning 

      Schulte Werning, Laura; Murugaiah, Anjanah; Singh, Bhupender; Johannessen, Mona; Engstad, Rolf Einar; Skalko-Basnet, Natasa; Holsæter, Ann Mari (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-09-21)
      An active wound dressing should address the main goals in wound treatment, which are improved wound healing and reduced infection rates. We developed novel multifunctional nanofibrous wound dressings with three active ingredients: chloramphenicol (CAM), beta-glucan (βG) and chitosan (CHI), of which βG and CHI are active nanofiber-forming biopolymers isolated from the cell walls of Saccharomyces ...

    • Old drug, new wrapping – A possible comeback for chloramphenicol? 

      Ingebrigtsen, Sveinung Gaarden; Didriksen, Alena; Johannessen, Mona; Skalko-Basnet, Natasa; Holsæter, Ann Mari (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-05-12)
      The antimicrobial drug chloramphenicol (CAM) exhibits activity against resistant bacteria, such as methicillin-resistant Staphylococcus aureus (MRSA). However, its use has been limited due to its toxicity. As the threat of antibiotic resistance continues to grow, a promising approach might be to increase the use of historical antimicrobial agents that demonstrate clinical efficacy, but are hampered ...

    • Serine residue 115 of MAPK-activated protein kinase MK5 is crucial for its PKA-regulated nuclear export and biological function. 

      Kostenko, Sergiy Viktorovich; Shiryaev, Alexey; Gerits, Nancy; Dumitriu, Gianina Aurica; Klenow, Helle Bagterp; Johannessen, Mona; Moens, Ugo (Journal article; Tidsskriftartikkel; Peer reviewed, 2010)

    • Serine-aspartate-repeat protein D Increases Staphylococcus aureus Virulence and Survival in Blood 

      Askarian, Fatemeh; Uchiyama, Satoshi; Valderrama, J. Andrés; Ajayi, Clement; Sollid, Johanna U. E.; Van Sorge, Nina M.; Nizet, Victor; van strijp, Jos A. G.; Johannessen, Mona (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-10-17)
      Staphylococcus aureus expresses a panel of cell wall-anchored adhesins, including proteins belonging to the microbial surface components recognizing adhesive matrix molecule (MSCRAMM) family, exemplified by the serine-aspartate repeat protein D (SdrD), which serve key roles in colonization and infection. Deletion of sdrD from S. aureus subsp. aureus strain NCTC8325-4 attenuated bacterial survival ...

    • Shotgun-Metagenomics on Positive Blood Culture Bottles Inoculated With Prosthetic Joint Tissue: A Proof of Concept Study 

      Sanabria-Moreno, Adriana Maria; Hjerde, Erik; Johannessen, Mona; Sollid, Johanna U Ericson; Simonsen, Gunnar Skov; Hanssen, Anne Merethe (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 ...

    • Staphylococcus aureus Membrane-derived Vesicles Promote Bacterial Virulence and Confer Protective Immunity in Murine Infection Models 

      Askarian, Fatemeh; Lapek Jr., John D.; Dongre, Mitesh; Tsai, Chih-Ming; Kumaraswamy, Monika; Kousha, Armin; Valderrama, J. Andrés; Ludviksen, Judith K; Cavanagh, Jorunn Pauline; Uchiyama, Satoshi; Mollnes, Tom Eirik; Gonzalez, David J.; Wai, Sun Nyunt; Victor, Nizet; Johannessen, Mona (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-02-20)
      <i>Staphylococcus aureus</i> produces membrane-derived vesicles (MVs), which share functional properties to outer membrane vesicles. Atomic force microscopy revealed that <i>S. aureus</i>-derived MVs are associated with the bacterial surface or released into the surrounding environment depending on bacterial growth conditions. By using a comparative proteomic approach, a total of 131 and 617 proteins ...

    • Staphylococcus aureus nasal carriage is associated with serum 25-hydroxyvitamin D levels, gender and smoking status. The Tromso Staph and Skin Study 

      Olsen, Karina; Falch, Birgit Margrethe; Danielsen, Kjersti; Johannessen, Mona; Sollid, Johanna U Ericson; Thune, Inger; Grimnes, Guri; Jorde, Rolf; Simonsen, Gunnar Skov; Furberg, Anne-Sofie (Journal article; Tidsskriftartikkel; Peer reviewed, 2012)
      Vitamin D induces the expression of antimicrobial peptides with activity against Staphylococcus aureus. Thus, we studied the association between serum 25-hydroxyvitamin D (25(OH)D) and S. aureus nasal colonization and carriage. Nasal swabs, blood samples and clinical data from 2,115 women and 1,674 men, aged 30–87 years, were collected in the Tromsø Staph and Skin Study 2007–08, as part of the ...

    • Staphylococcus aureus nasal carriage is associated with serum 25-hydroxyvitamin D levels, gender and smoking status. The Tromsø Staph and Skin Study 

      Olsen, Karina; Falch, Birgit Margrethe; Danielsen, Kjersti; Johannessen, Mona; Sollid, Johanna U Ericson; Thune, Inger; Grimnes, Guri; Jorde, Rolf; Simonsen, Gunnar Skov; Furberg, Anne-Sofie (Journal article; Tidsskriftartikkel; Peer reviewed, 2011)
      Vitamin D induces the expression of antimicrobial peptides with activity against Staphylococcus aureus. Thus, we studied the association between serum 25-hydroxyvitamin D (25(OH)D) and S. aureus nasal colonization and carriage. Nasal swabs, blood samples and clinical data from 2,115 women and 1,674 men, aged 30–87 years, were collected in the Tromsø Staph and Skin Study 2007–08, as part of the ...

    • A staphylococcus aureus TIR domain protein virulence factor blocks TLR2-mediated NF-κB signaling 

      Askarian, Fatemeh; van Sorge, Nina; Sangvik, Maria; Beasley, Federico C; Henriksen, Jørn Remi; Sollid, Johanna U Ericson; van Strijp, Jos A. G.; Nizet, Victor; Johannessen, Mona (Journal article; Tidsskriftartikkel; Peer reviewed, 2014)

    • The Antimicrobial Properties of Chitosan Can be  Tailored by Formulation 

      Jøraholmen, May Wenche; Bhargava, Abhilasha; Julin, Kjersti; Johannessen, Mona; Skalko-Basnet, Natasa (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-01-31)
      Topical administration of drugs into the vagina can provide local therapy of vaginal infections, preventing the possible systemic side effects of the drugs. The natural polysaccharide chitosan is known for its excellent mucoadhesive properties, safety profile, and antibacterial effects, and thus it can be utilized in improving localized vaginal therapy by prolonging the residence time of a drug at ...

    • Transcriptome profiling of staphylococcus aureus associated extracellular vesicles reveals presence of small RNA-cargo 

      Joshi, Bishnu; Singh, Bhupender; Nadeem, Aftab; Askarian, Fatemeh; Wai, Sun Nyunt; Johannessen, Mona; Hegstad, Kristin (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-01-13)
      Bacterial extracellular vesicles (EVs) have a vital role in bacterial pathogenesis. However, to date, the small RNA-cargo of EVs released by the opportunistic pathogen Staphylococcus aureus has not been characterized. Here, we shed light on the association of small RNAs with EVs secreted by S. aureus MSSA476 cultured in iron-depleted bacteriologic media supplemented with a subinhibitory dosage of ...