Browsing Bergen Open Research Archive by Author "Døskeland, Stein Ove"
Now showing items 1-19 of 19
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The 14-3-3 proteins in regulation of cellular metabolism
Kleppe, Rune; Martinez, Aurora; Døskeland, Stein Ove; Haavik, Jan (Peer reviewed; Journal article, 2011-09)Thirty years ago, it was discovered that 14-3-3 proteins could activate enzymes involved in amino acid metabolism. In the following decades, 14-3-3s have been shown to be involved in many different signaling pathways that ... -
Activation of Protein Kinase A and Exchange Protein Directly Activated by cAMP Promotes Adipocyte Differentiation of Human Mesenchymal Stem Cells
Jia, Bingbing; Madsen, Lise; Petersen, Rasmus Koefoed; Techer, Nathalie; Kopperud, Reidun Kristin; Ma, Tao; Døskeland, Stein Ove; Ailhaud, Gérard; Wang, Jinfu; Amri, Ez-Zoubir; Kristiansen, Karsten (Peer reviewed; Journal article, 2012-03-27)Human mesenchymal stem cells are primary multipotent cells capable of differentiating into several cell types including adipocytes when cultured under defined in vitro conditions. In the present study we investigated the ... -
Anabaenolysins, Novel Cytolytic Lipopeptides from Benthic Anabaena Cyanobacteria
Jokela, Jouni; Oftedal, Linn; Herfindal, Lars; Permi, Perttu; Wahlsten, Matti; Døskeland, Stein Ove; Sivonen, Kaarina (Peer reviewed; Journal article, 2012-07-19)Two novel cyclic lipopeptides, anabaenolysin A and anabaenolysin B, were isolated from two benthic cyanobacterial strains of the genus Anabaena. This novel class of cyanobacterial lipopeptides has a general structure of a ... -
The apoptosis-inducing activity towards leukemia and lymphoma cells in a cyanobacterial culture collection is not associated with mouse bioassay toxicity
Oftedal, Linn; Skjærven, Kaja H.; Coyne, Rosie T.; Edvardsen, Bente; Rohrlack, Thomas; Skulberg, Olav M.; Døskeland, Stein Ove; Herfindal, Lars (Peer reviewed; Journal article, 2010-08-06)Cyanobacteria (83 strains and seven natural populations) were screened for content of apoptosis (cell death)-inducing activity towards neoplastic cells of the immune (jurkat acute T-cell lymphoma) and hematopoetic (acute ... -
Cell Death inducing microbial protein phosphatase inhibitors-mechanisms of action
Kleppe, Rune; Herfindal, Lars; Døskeland, Stein Ove (Peer reviewed; Journal article, 2015-10-22)Okadaic acid (OA) and microcystin (MC) as well as several other microbial toxins like nodularin and calyculinA are known as tumor promoters as well as inducers of apoptotic cell death. Their intracellular targets are the ... -
Cyanobacteria from terrestrial and marine sources contain apoptogens able to overcome chemoresistance in acute myeloid leukemia cells
Liu, Liwei; Herfindal, Lars; Jokela, Jouni; Shishido, Tania Keiko; Wahlsten, Matti; Døskeland, Stein Ove; Sivonen, Kaarina (Peer reviewed; Journal article, 2014-04-03)In this study, we investigated forty cyanobacterial isolates from biofilms, gastropods, brackish water and symbiotic lichen habitats. Their aqueous and organic extracts were used to screen for apoptosis-inducing activity ... -
Cyclic AMP can promote APL progression and protect myeloid leukemia cells against anthracycline-induced apoptosis
Gausdal, Gro; Wergeland, Anita; Skavland, Jørn; Nguyen, Eric; Pendino, Frédéric; Rouhee, Nazanin; McCormack, Emmet; Herfindal, Lars; Kleppe, Rune; Havemann, Ursula; Schwede, Frank; Bruserud, Øystein; Gjertsen, Bjørn Tore; Lanotte, Michel; Ségal-Bendirdjian, Evelyne; Døskeland, Stein Ove (Peer reviewed; Journal article, 2013)We show that cyclic AMP (cAMP) elevating agents protect blasts from patients with acute promyelocytic leukemia (APL) against death induced by first-line anti-leukemic anthracyclines like daunorubicin (DNR). The cAMP effect ... -
Epac1 Is Crucial for Maintenance of Endothelial Barrier Function through A Mechanism Partly Independent of Rac1
Garcia-Ponce, Alexander; Schuster, Katharina; Døskeland, Stein Ove; Reed, Rolf K.; Curry, Fitz-Roy E.; Wasche, Jens; Radeva, Mariya Y (Journal article; Peer reviewed, 2020)Epac1 (exchange protein activated by cAMP) stabilizes the endothelial barrier, but detailed studies are limited by the side effects of pharmacological Epac1 modulators and transient transfections. Here, we compare the key ... -
Epac1 null mice have nephrogenic diabetes insipidus with deficient corticopapillary osmotic gradient and weaker collecting duct tight junctions
Åsrud, Kathrine Sivertsen; Bjørnstad, Ronja; Kopperud, Reidun Kristin; Pedersen, Line; van der Hoeven, Barbara; Karlsen, Tine Veronica; Rygh, Cecilie Brekke; Curry, Fitz-Roy; Bakke, Marit; Reed, Rolf K.; Tenstad, Olav; Døskeland, Stein Ove (Journal article; Peer reviewed, 2020)Aim The cAMP‐mediator Epac1 (RapGef3) has high renal expression. Preliminary observations revealed increased diuresis in Epac1−/− mice. We hypothesized that Epac1 could restrict diuresis by promoting transcellular collecting ... -
Epac1-deficient mice have bleeding phenotype and thrombocytes with decreased GPIbβ expression
Nygaard, Gyrid; Herfindal, Lars; Åsrud, Kathrine Sivertsen; Bjørnstad, Ronja; Kopperud, Reidun Kristin; Oveland, Eystein; Berven, Frode; Myhren, Lene Elisabeth; Høivik, Erling Andre; Lunde, Turid Helen Felli; Bakke, Marit; Døskeland, Stein Ove; Selheim, Frode (Peer reviewed; Journal article, 2017)Epac1 (Exchange protein directly activated by cAMP 1) limits fluid loss from the circulation by tightening the endothelial barrier. We show here that Epac1−/− mice, but not Epac2−/− mice, have prolonged bleeding time, ... -
Functional p53 is required for rapid restoration of daunorubicin-induced lesions of the spleen
Herfindal, Lars; Myhren, Lene Elisabeth; Gjertsen, Bjørn Tore; Døskeland, Stein Ove; Gausdal, Gro (Peer reviewed; Journal article, 2013-07-11)Background: The tumour suppressor and transcription factor p53 is a major determinant of the therapeutic response to anthracyclines. In healthy tissue, p53 is also considered pivotal for side effects of anthracycline ... -
Introduction of aromatic ring-containing substituents in cyclic nucleotides is associated with inhibition of toxin uptake by the hepatocyte transporters OATP 1B1 and 1B3
Herfindal, Lars; Krakstad, Camilla; Myhren, Lene Elisabeth; Hagland, Hanne; Kopperud, Reidun Kristin; Teigen, Knut; Schwede, Frank; Kleppe, Rune; Døskeland, Stein Ove (Peer reviewed; Journal article, 2014-04-16)Analogs of the cyclic nucleotides cAMP and cGMP have been extensively used to mimic or modulate cellular events mediated by protein kinase A (PKA), Exchange protein directly activated by cAMP (Epac), or protein kinase G ... -
Iodinin (1,6-dihydroxyphenazine 5,10-dioxide) from Streptosporangium sp. induces apoptosis selectively in myeloid leukemia cell lines and patient cells
Myhren, Lene Elisabeth; Nygård, Gyrid; Gausdal, Gro; Sletta, Håvard; Teigen, Knut; Degnes, Kristin Fløgstad; Zahlsen, Kolbjørn; Brunsvik, Anders; Bruserud, Øystein; Døskeland, Stein Ove; Selheim, Frode; Herfindal, Lars (Peer reviewed; Journal article, 2013-01-30)Despite recent improvement in therapy, acute myeloid leukemia (AML) is still associated with high lethality. In the presented study, we analyzed the bioactive compound iodinin (1,6-dihydroxyphenazine 5,10-dioxide) from a ... -
Marine Benthic Cyanobacteria Contain Apoptosis-Inducing Activity Synergizing with Daunorubicin to Kill Leukemia Cells, but not Cardiomyocytes
Oftedal, Linn Silje Wathne; Selheim, Frode; Wahlsten, Matti; Sivonen, Kaarina; Døskeland, Stein Ove; Herfindal, Lars (Peer reviewed; Journal article, 2010-10-14)The potential of marine benthic cyanobacteria as a source of anticancer drug candidates was assessed in a screen for induction of cell death (apoptosis) in acute myeloid leukemia (AML) cells. Of the 41 marine cyanobacterial ... -
Marine Benthic Diatoms Contain Compounds Able to Induce Leukemia Cell Death and Modulate Blood Platelet Activity
Prestegard, Siv Kristin; Oftedal, Linn Silje Wathne; Coyne, Rosie Theresa; Nygård, Gyrid; Skjærven, Kaja Helvik; Knutsen, Gjert; Døskeland, Stein Ove; Herfindal, Lars (Peer reviewed; Journal article, 2009-11-18)In spite of the high abundance and species diversity of diatoms, only a few bioactive compounds from them have been described. The present study reveals a high number of mammalian cell death inducing substances in ... -
Proteome and Phosphoproteome Changes Associated with Prognosis in Acute Myeloid Leukemia
Aasebø, Elise; Berven, Frode; Bartaula-Brevik, Sushma; Stokowy, Tomasz; Hovland, Randi; Vaudel, Marc; Døskeland, Stein Ove; Mc Cormack, Emmet; Batth, Tanveer S; Olsen, Jesper V; Bruserud, Øystein; Selheim, Frode; Hernandez-Valladares, Maria (Journal article; Peer reviewed, 2020)Acute myeloid leukemia (AML) is a hematological cancer that mainly affects the elderly. Although complete remission (CR) is achieved for the majority of the patients after induction and consolidation therapies, nearly ... -
The Regulatory Subunit of PKA-I Remains Partially Structured and Undergoes b-Aggregation upon Thermal Denaturation
Dao, Khanh K.; Pey, Angel; Gjerde, Anja Underhaug; Teigen, Knut; Byeon, In-Ja L.; Døskeland, Stein Ove; Gronenborn, Angela M.; Martinez, Aurora (Peer reviewed; Journal article, 2011-03-04)Background: The regulatory subunit (R) of cAMP-dependent protein kinase (PKA) is a modular flexible protein that responds with large conformational changes to the binding of the effector cAMP. Considering its highly dynamic ... -
Specificity of commonly used cyclic nucleotides with PKA, PKG and Epac-implementing microcalorimetry to determine PDE activities
Beavo, Joseph A.; Bos, Johannes L.; Butt, Elke; Døskeland, Stein Ove; Genieser, Hans-Gottfried; Hinds, Thomas R.; Poppe, Heiko; Rehmann, Holger; Rybalkin, Sergei D.; Schwede, Frank; Tang, Xiao-Bo (Conference lecture, 2007-07-25) -
UCP1 induction during recruitment of Brown Adipocytes in White Adipose tissue is dependent on Cyclooxygenase activity
Madsen, Lise; Pedersen, Lone M.; Lillefosse, Haldis Haukaas; Fjære, Even; Brønstad, Ingeborg; Hao, Qin; Petersen, Rasmus Koefoed; Hallenborg, Philip; Ma, Tao; De Matteis, Rita; Araujo, Pedro; Mercader, Josep; Bonet, M. Luisa; Hansen, Jacob B.; Cannon, Barbara; Nedergaard, Jan; Wang, Jun; Cinti, Saverio; Voshol, Peter; Døskeland, Stein Ove; Kristiansen, Karsten (Peer reviewed; Journal article, 2010-06-30)Background The uncoupling protein 1 (UCP1) is a hallmark of brown adipocytes and pivotal for cold- and diet-induced thermogenesis. Methodology/Principal Findings Here we report that cyclooxygenase (COX) activity and ...