• Chip-based multimodal super-resolution microscopy for histological investigations of cryopreserved tissue sections 

      Villegas, Luis; Dubey, Vishesh Kumar; Nystad, Mona; Tinguely, Jean-Claude; Coucheron, David Andre; Dullo, Firehun Tsige; Priyadarshi, Anish; Acuna Maldonado, Sebastian Andres; Ahmad, Azeem; Mateos, Jose M.; Barmettler, Gery; Ziegler, Urs; Birgisdottir, Åsa Birna; Hovd, Aud-Malin Karlsson; Fenton, Kristin Andreassen; Acharya, Ganesh; Agarwal, Krishna; Ahluwalia, Balpreet Singh (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-02-24)
      Histology involves the observation of structural features in tissues using a microscope. While diffraction-limited optical microscopes are commonly used in histological investigations, their resolving capabilities are insufficient to visualize details at subcellular level. Although a novel set of super-resolution optical microscopy techniques can fulfill the resolution demands in such cases, the ...
    • Chitosan-based delivery system enhances antimicrobial activity of chlorhexidine 

      Hemmingsen, Lisa Myrseth; Panchai, Pimmat; Julin, Kjersti; Basnet, Purusotam; Nystad, Mona; Johannessen, Mona; Skalko-Basnet, Natasa (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-09-29)
      Infected chronic skin wounds and other skin infections are increasingly putting pressure on the health care providers and patients. The pressure is especially concerning due to the rise of antimicrobial resistance and biofilm-producing bacteria that further impair treatment success. Therefore, innovative strategies for wound healing and bacterial eradication are urgently needed; utilization ...
    • Differentially Expressed MicroRNAs in Meningiomas Grades I and II Suggest Shared Biomarkers with Malignant Tumors 

      El-Gewely, Mohamed Raafat; Andreassen, Morten; Walquist, Mari; Ursvik, Anita; Knutsen, Erik; Nystad, Mona; Coucheron, Dag H; Myrmel, Kristin Smistad; Hennig, Rune; Johansen, Steinar D (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-03-03)
      Meningiomas represent the most common primary tumors of the central nervous system, but few microRNA (miRNA) profiling studies have been reported so far. Deep sequencing of small RNA libraries generated from two human meningioma biopsies WHO grades I (benign) and II (atypical) were compared to excess dura controls. Nineteen differentially expressed miRNAs were validated by RT-qPCR using tumor RNA ...
    • Dyes in Disguise: characterization of fluorescently labeled liposomes 

      Cauzzo, Jennifer; Nystad, Mona; Holsæter, Ann Mari; Basnet, Purusotam; Skalko-Basnet, Natasa (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-07-09)
      The rather limited success of translation from basic research to clinical application has been highlighted as a major issue in the nanomedicine field. To identify the factors influencing the applicability of nanosystems as drug carriers and potential nanomedicine, we focused on following their fate through fluorescence-based assays, namely flow cytometry and imaging. These methods are often used to ...
    • Following the fate of dye-containing liposomes in vitro 

      Cauzzo, Jennifer; Nystad, Mona; Holsæter, Ann Mari; Basnet, Purusotam; Skalko-Basnet, Natasa (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-07-09)
      The rather limited success of translation from basic research to clinical application has been highlighted as a major issue in the nanomedicine field. To identify the factors influencing the applicability of nanosystems as drug carriers and potential nanomedicine, we focused on following their fate through fluorescence-based assays, namely flow cytometry and imaging. These methods are often used to ...
    • High-throughput spatial sensitive quantitative phase microscopy using low spatial and high temporal coherent illumination 

      Ahmad, Azeem; Dubey, Vishesh; Jayakumar, Nikhil; Habib, Anowarul; Butola, Ankit; Nystad, Mona; Acharya, Ganesh; Basnet, Purusotam; Mehta, Dalip Singh; Ahluwalia, Balpreet Singh (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-08-04)
      High space-bandwidth product with high spatial phase sensitivity is indispensable for a single-shot quantitative phase microscopy (QPM) system. It opens avenue for widespread applications of QPM in the field of biomedical imaging. Temporally low coherence light sources are implemented to achieve high spatial phase sensitivity in QPM at the cost of either reduced temporal resolution or smaller field ...
    • Laeverin Protein Expression in Normal and Preeclamptic Placentas using Tissue Microarray Analysis 

      Nystad, Mona; Sitras, Vasilis; Nordbakken, Cecilie Valborg; Pedersen, Mona Irene; Acharya, Ganesh (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-01-21)
      <p><i>Introduction - </i>Laeverin is a placenta‐specific protein that is normally expressed in the plasma membrane of human trophoblasts. In previous studies, we showed higher expression levels of laeverin gene in preeclamptic compared with normal placentas and found that laeverin protein was ectopically expressed in the cytoplasm of the preeclamptic placentas. Our objective was to investigate ...
    • Longitudinal reference ranges for maternal plasma laeverin, and its role as a potential biomarker of preeclampsia 

      Nystad, Mona; Sitras, Vasilis; Flo, Kari; Widnes, Christian; Vårtun, Åse; Wilsgaard, Tom; Acharya, Ganesh (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-11-25)
      Background: Laeverin is a placenta-specific membrane-bound aminopeptidase. In this study we wanted to: 1) serially measure plasma levels of laeverin in healthy women during the second half of pregnancy and postpartum, 2) determine whether laeverin is differently expressed at 22–24 weeks in women who later develop preeclampsia compared to controls, 3) compare laeverin protein expression in placenta ...
    • Maternal serum laeverin (aminopeptidase Q) measured in the first trimester of pregnancy does not predict preeclampsia 

      Pihl, Kasper; Sørensen, Steen; Nystad, Mona; Acharya, Ganesh; Jørgensen, Finn S. (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-04-22)
      <i>Objective</i>: The aim of this study was to compare the laeverin level in maternal serum from first trimester (11–14 weeks) of pregnancy between normal pregnancies and pregnancies that later developed preeclampsia (PE).<p><p> <i>Material and methods</i>: This was a case-cohort study. The laeverin concentration was measured in cases with preterm PE (<i>n</i> = 55), term PE (<i>n</i> = 95), and ...
    • Photonic-chip: a multimodal imaging tool for histopathology 

      Villegas, Luis; Dubey, Vishesh Kumar; Tinguely, Jean-Claude; Coucheron, David Andre; Priyadarshi, Anish; Acuña Maldonado, Sebastian Andres; Agarwal, Krishna; Mateos, Jose M; Nystad, Mona; Hovd, Aud-Malin Karlsson; Fenton, Kristin Andreassen; Ahluwalia, Balpreet Singh (Conference object; Konferansebidrag, 2021-04)
      We propose the photonic-chip as a multimodal imaging platform for histopathological assessment, allowing large fields-of-view across diverse microscopy methods including total internal reflection fluorescence and single-molecule localization.
    • Platelet alloimmunization is associated with low grade chronic histiocytic intervillositis - A new link to a rare placental lesion? 

      Nedberg, Nora Hersoug; Turowski, Gitta Erika; Guz, Katarzyna; Przytuła, Ewa; Uhrynowska, Małgorzata; Roald, Borghild; Husebekk, Anne; Sitras, Vasilis; Nystad, Mona; Dębska, Marzena; Brojer, Ewa; Tiller, Heidi (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-07-23)
      <i>Introduction</i> - Maternal alloimmunization against human platelet antigen (HPA)-1a has been implied to mediate both reduced birth weight and chronic placental inflammation. Fetal growth restriction is associated with different types of chronic inflammation in the placenta, mainly chronic histiocytic intervillositis and chronic villitis. The aim of this prospective study was to do a systematic ...
    • Role of Laeverin in the pathophysiology of preeclampsia 

      Nystad, Mona (Doctoral thesis; Doktorgradsavhandling, 2018-05-11)
      Preeclampsia is a pregnancy-specific disease, affecting 5-10% of human pregnancies worldwide. It is defined as new-onset hypertension after 20 weeks of gestation with either proteinuria and/or organ failure. Laeverin is a membrane-bound aminopeptidase exclusively expressed in the placenta. Our previous studies revealed a significant upregulation of laeverin mRNA in preeclamptic placentas, building ...
    • Visualizing ultrastructural details of placental tissue with super-resolution structured illumination microscopy 

      Villegas Hernandez, Luis Enrique; Nystad, Mona; Ströhl, Florian; Basnet, Purusotam; Acharya, Ganesh; Ahluwalia, Balpreet Singh (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-06-14)
      Super-resolution fluorescence microscopy is a widely employed technique in cell biology research, yet remains relatively unexplored in the field of histopathology. Here, we describe the sample preparation steps and acquisition parameters necessary to obtain fluorescent multicolor super-resolution structured illumination microscopy (SIM) images of both formalin-fixed paraffin-embedded and cryo-preserved ...