Blar i Bergen Open Research Archive på forfatter "Hov, Johannes Espolin Roksund"
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Altered Gut Microbial Metabolism of Essential Nutrients in Primary Sclerosing Cholangitis
Kummen, Martin; Thingholm, Louise B.; Rühlemann, Malte C.; Holm, Kristian; Hansen, Simen Hyll; Moitinho-Silva, Lucas; Liwinski, Timur; Zenouzi, Roman; Larsen, Christopher Storm; Midttun, Øivind; McCann, Adrian; Ueland, Per Magne; Høivik, Marte Lie; Vesterhus, Mette; Trøseid, Marius; Laudes, Matthias; Lieb, Wolfgang; Karlsen, Tom Hemming; Bang, Corinna; Schramm, Christoph; Franke, Andre; Hov, Johannes Espolin Roksund (Journal article; Peer reviewed, 2021)Background & Aims To influence host and disease phenotype, compositional microbiome changes, which have been demonstrated in patients with primary sclerosing cholangitis (PSC), must be accompanied by functional changes. ... -
Associations of neopterin and kynurenine–tryptophan ratio with survival in primary sclerosing cholangitis
Dhillon, Amandeep Kaur; Rupp, Christian; Bergquist, Annika; Voitl, Robert; Folseraas, Trine; Trøseid, Marius; Midttun, Øivind; Ueland, Per Magne; Karlsen, Tom Hemming; Vesterhus, Mette Nåmdal; Kummen, Martin; Hov, Johannes Espolin Roksund (Journal article; Peer reviewed, 2021)Background and aims Biomarkers of inflammation may be of clinical utility in primary sclerosing cholangitis (PSC). We aimed to investigate the interferon gamma-related biomarkers neopterin and kynurenine–tryptophanratio ... -
Autotaxin activity predicts transplant-free survival in primary sclerosing cholangitis
Dhillon, Amandeep Kaur; Kremer, Andreas E.; Kummen, Martin; Boberg, Kirsten Muri; Elferink, Ronald P. Oude; Karlsen, Tom Hemming; Beuers, Ulrich; Vesterhus, Mette; Hov, Johannes Espolin Roksund (Peer reviewed; Journal article, 2019-06-11)Autotaxin has been associated with liver disease severity and transplant-free survival. This study aimed to validate autotaxin as a biomarker in two cohorts of Norwegian large-duct PSC patients, one discovery panel (n=165) ... -
The carnitine-butyrobetaine-TMAO pathway after cardiac transplant: Impact on cardiac allograft vasculopathy and acute rejection
Trøseid, Marius; Mayerhofer, Christiane Caroline; Broch, Kaspar; Arora, Satish; Svardal, Asbjørn M.; Hov, Johannes Espolin Roksund; Andreassen, Arne K.; Gude, Einar; Karason, Kristjan; Dellgren, Gøran; Berge, Rolf Kristian; Gullestad, Lars; Aukrust, Pål; Ueland, Thor (Peer reviewed; Journal article, 2019)BACKGROUND: Alterations in the partly microbiota-dependent carnitine–γ-butyrobetaine (γBB)–trimethylamine N-oxide (TMAO) pathway have been linked to the progression of heart failure and atherosclerotic disease. We evaluated ... -
Circulating Macrophage Activation Markers Predict Transplant-Free Survival in Patients With Primary Sclerosing Cholangitis
Bossen, Lars; Vesterhus, Mette Nåmdal; Hov, Johannes Espolin Roksund; Färkkilä, Martti; Rosenberg, William; Møller, Holger J.; Boberg, Kirsten Muri; Karlsen, Tom Hemming; Grønbæk, Henning (Journal article; Peer reviewed, 2021)INTRODUCTION: Primary sclerosing cholangitis (PSC) is a progressive liver disease characterized by bile duct inflammation and fibrosis. The role of macrophages in PSC development and progression is less studied. Macrophage ... -
Circulating markers of gut barrier function associated with disease severity in primary sclerosing cholangitis
Dhillon, Amandeep Kaur; Kummen, Martin; Trøseid, Marius; Åkra, Sissel; Liaskou, Evaggelia; Moum, Bjørn; Vesterhus, Mette; Karlsen, Tom Hemming; Seljeflot, Ingebjørg; Hov, Johannes Espolin Roksund (Peer reviewed; Journal article, 2019-02)Background & Aims: One important hypothesis in primary sclerosing cholangitis pathophysiology suggests that bacterial products from an inflamed leaky gut lead to biliary inflammation. We aimed to investigate whether ... -
Clinical and biochemical impact of vitamin B6 deficiency in primary sclerosing cholangitis before and after liver transplantation
Braadland, Peder Rustøen; Bergquist, Annika; Kummen, Martin; Bossen, Lars; Engesæter, Lise Katrine; Reims, Henrik Mikael; Bjørk, Ida Torunn; Grzyb, Krzysztof; Abildgaard, Andreas; Småstuen, Milada Cvancarova; Folseraas, Trine; Trøseid, Marius; Ulvik, Arve; Ueland, Per Magne; Melum, Espen; Line, Pål Dag; Høivik, Marte Lie; Grønbæk, Henning; Karlsen, Tom Hemming; Vesterhus, Mette Nåmdal; Hov, Johannes Espolin Roksund (Journal article; Peer reviewed, 2023)Background and aims We previously demonstrated that people with primary sclerosing cholangitis (PSC) had reduced gut microbial capacity to produce active vitamin B6 (pyridoxal 5’-phosphate [PLP]), which corresponded to ... -
Clinical response to fecal microbiota transplantation in patients with diarrhea-predominant irritable bowel syndrome is associated with normalization of fecal microbiota composition and short-chain fatty acid levels
Mazzawi, Tarek; Hausken, Trygve; Hov, Johannes Espolin Roksund; Valeur, Jørgen; Sangnes, Dag André; El-Salhy, Magdy; Gilja, Odd Helge; Hatlebakk, Jan Gunnar; Lied, Gülen Arslan (Peer reviewed; Journal article, 2019)Objectives: Irritable bowel syndrome (IBS) may be associated with disturbances in gut microbiota composition and functions. We recently performed a study of fecal microbiota transplantation (FMT) in diarrhea-predominant ... -
Comprehensive assessment of ECM turnover using serum biomarkers establishes PBC as a high-turnover autoimmune liver disease
Vesterhus, Mette; Nielsen, Mette; Hov, Johannes Espolin Roksund; Saffioti, Francesca; Manon-Jensen, Tina; Leeming, Diana Julie; Moum, Bjørn; Boberg, Kirsten Muri; Pinzani, Massimo; Karlsen, Tom Hemming; Karsdal, Morten A; Thorburn, Douglas (Journal article; Peer reviewed, 2021)Background & Aims: Primary sclerosing cholangitis (PSC), primary biliary cholangitis (PBC) and autoimmune hepatitis (AIH) are phenotypically distinct autoimmune liver diseases that progress to cirrhosis and liver failure; ... -
Detailed stratified GWAS analysis for severe COVID-19 in four European populations
Degenhardt, Frauke; Ellinghaus, David; Juzenas, Simonas; Lerga-Jaso, Jon; Wendorff, Mareike; Maya-Miles, Douglas; Uellendahl-Werth, Florian; ElAbd, Hesham; Lenning, Ole Bernt; Myhre, Ronny; Vadla, May Sissel; Holten, Aleksander Rygh; Kildal, Anders Benjamin; Lind, Andreas; Dyrhol-Riise, Anne Ma; Hoff, Dag Arne Lihaug; Müller, Fredrik; Solligård, Erik; Holter, Jan Cato; Afset, Jan Egil; Damås, Jan Kristian; Bergan, Jonas; Risnes, Kari; Muller, Karl Erik; Tonby, Kristian; Heggelund, Lars; Gustad, Lise Tuset; Grimsrud, Marit Mæhle; Dudman, Susanne Gjeruldsen; Folseraas, Trine; Skogen, Vegard; Hov, Johannes Espolin Roksund; Karlsen, Tom Hemming; Rühlemann, Malte C.; Arora, Jatin; Özer, Onur; Wacker, Eike Matthias; Wienbrandt, Lars; Ortiz, Aron Blandino; de Salazar, Adolfo; Chercoles, Adolfo Garrido; Palom, Adriana; Ruiz, Agustin; Garzia-Fernandez, Alba-Estela; Blanco-Grau, Albert; Mantovani, Alberto; Zanella, Alberto; Mayer, Alena; Bandera, Alessandra; Franke, Andre (Journal article; Peer reviewed, 2022)Given the highly variable clinical phenotype of Coronavirus disease 2019 (COVID-19), a deeper analysis of the host genetic contribution to severe COVID-19 is important to improve our understanding of underlying disease ... -
Enhanced liver fibrosis test predicts transplant-free survival in primary sclerosing cholangitis, a multi-centre study
de Vries, Elisabeth M.G.; Färkkilä, Martti; Milkiewicz, Piotr; Hov, Johannes Espolin Roksund; Eksteen, Bertus; Thorburn, Douglas; Chazouillères, Olivier; Pares, Albert; Nygård, Ståle; Gilja, Odd Helge; Wunsch, Ewa; Invernizzi, Pietro; Carbone, Marco; Bernuzzi, Francesca; Boberg, Kirsten Muri; Røsjø, Helge; Rosenberg, William; Beuers, Ulrich H.; Ponsioen, Cyriel Y.; Karlsen, Tom Hemming; Vesterhus, Mette (Peer reviewed; Journal article, 2017-10)Background & Aims: Biomarkers reflecting disease activity and prognosis in primary sclerosing cholangitis (PSC) have not been firmly established. Enhanced liver fibrosis (ELF) test was previously reported to predict outcome ... -
Gut microbiota composition during a 12-week intervention with delayed-release dimethyl fumarate in multiple sclerosis – a pilot trial
Storm-Larsen, Christopher; Myhr, Kjell-Morten; Farbu, Elisabeth; Midgard, Rune; Nyquist, Kaja Beate; Broch, Line; Berg-Hansen, Pål; Hov, Johannes Espolin Roksund; Holmøy, Trygve (Peer reviewed; Journal article, 2019)Introduction: Patients with multiple sclerosis may have a distinct gut microbiota profile. Delayed-release dimethyl fumarate is an orally administered drug for relapsing–remitting multiple sclerosis, which has been associated ... -
Gut microbiota composition during hospitalization is associated with 60-day mortality after severe COVID-19
Trøseid, Marius; Holter, Jan Cato; Holm, Kristian; Vestad, Beate; Sazonova, Taisiia; Granerud, Beathe Kiland; Dyrhol-Riise, Anne Ma; Holten, Aleksander Rygh; Tonby, Kristian; Kildal, Anders Benjamin; Heggelund, Lars; Tveita, Anders Aune; Bøe, Simen; Müller, Karl Erik; Jenum, Synne; Hov, Johannes Espolin Roksund; Ueland, Thor (Journal article; Peer reviewed, 2023)Background Gut microbiota alterations have been reported in hospitalized COVID-19 patients, with reduced alpha diversity and altered microbiota composition related to respiratory failure. However, data regarding gut ... -
Gut microbiota-dependent trimethylamine N-oxide associates with inflammation in common variable immunodeficiency
Macpherson, Magnhild Eide; Hov, Johannes Espolin Roksund; Ueland, Thor; Dahl, Tuva Børresdatter; Kummen, Martin; Otterdal, Kari; Holm, Kristian; Berge, Rolf Kristian; Mollnes, Tom Eirik; Trøseid, Marius; Halvorsen, Bente; Aukrust, Pål; Fevang, Børre; Jørgensen, Silje Fjellgård (Journal article; Peer reviewed, 2020)A substantial proportion of patients with common variable immunodeficiency (CVID) have inflammatory and autoimmune complications of unknown etiology. We have previously shown that systemic inflammation in CVID correlates ... -
Impact of HIV and type 2 diabetes on gut microbiota diversity, tryptophan catabolism and endothelial dysfunction
Hoel, Hedda Benedicte; Hove-Skovsgaard, Malene; Hov, Johannes Espolin Roksund; Gaardbo, Julie Christine; Holm, Kristian; Kummen, Martin; Rudi, Knut; Nwosu, Felix; Valeur, Jørgen; Gelpi, Marco; Seljeflot, Ingebjørg; Ueland, Per Magne; Gerstoft, Jan; Ullum, Henrik; Aukrust, Pål; Nielsen, Susanne Dam; Trøseid, Marius (Peer reviewed; Journal article, 2018-04-30)HIV infection and type 2 diabetes are associated with altered gut microbiota, chronic inflammation, and increased cardiovascular risk. We aimed to investigate the combined effect of these diseases on gut microbiota composition ... -
Increased Plasma Levels of Triglyceride-Enriched Lipoproteins Associate with Systemic Inflammation, Lipopolysaccharides, and Gut Dysbiosis in Common Variable Immunodeficiency
Macpherson, Magnhild Eide; Skarpengland, Tonje; Hov, Johannes Espolin Roksund; Ranheim, Trine; Vestad, Beate; Dahl, Tuva Børresdatter; Fraz, Mai Sasaki Aanensen; Michelsen, Annika Elisabet; Holven, Kirsten Bjørklund; Fevang, Børre; Berge, Rolf Kristian; Aukrust, Pål; Halvorsen, Bente; Jørgensen, Silje Fjellgård (Journal article; Peer reviewed, 2023)Purpose: Triglycerides (TG) and their major transport lipoprotein in the circulation (VLDL) appear to be related to inflammation. Patients with common variable immunodeficiency (CVID) have inflammatory complications ... -
The kinetics of gut microbial community composition in patients with irritable bowel syndrome following fecal microbiota transplantation
Mazzawi, Tarek; Lied, Gülen Arslan; Sangnes, Dag André; El-Salhy, Magdy; Hov, Johannes Espolin Roksund; Gilja, Odd Helge; Hatlebakk, Jan Gunnar; Hausken, Trygve (Peer reviewed; Journal article, 2018-11-14)Background: Gut microbiota alterations are important in irritable bowel syndrome (IBS). The aim was to investigate the effect of fecal microbiota transplantation (FMT) on gut microbiota and the symptoms in patients with ... -
Low fibre intake is associated with gut microbiota alterations in chronic heart failure
Mayerhofer, Cristiane C.K.; Kummen, Martin; Holm, Kristian; Broch, Kaspar; Awoyemi, Ayodeji Olawale; Vestad, Beate; Larsen, Christopher Storm; Seljeflot, Ingebjørg; Ueland, Thor; Bohov, Pavol; Berge, Rolf Kristian; Svardal, Asbjørn M.; Gullestad, Lars; Yndestad, Arne; Aukrust, Pål; Hov, Johannes Espolin Roksund; Trøseid, Marius (Journal article; Peer reviewed, 2020)Aims Recent reports have suggested that patients with heart failure (HF) have an altered gut microbiota composition; however, associations with diet remain largely uninvestigated. We aimed to explore differences in the ... -
Major increase in microbiota-dependent proatherogenic metabolite TMAO one year after bariatric surgery
Trøseid, Marius; Hov, Johannes Espolin Roksund; Nestvold, Torunn Kristin; Thoresen, Hanne; Berge, Rolf Kristian; Svardal, Asbjørn M.; Lappegård, Knut Tore (Journal article; Peer reviewed, 2016)Background: Trimethylamine-N-oxide (TMAO) is formed in the liver from trimethylamine (TMA), a product exclusively generated by the gut microbiota from dietary phosphatidylcholine and carnitine. An alternative pathway of ... -
Mapping the human genetic architecture of COVID-19
Niemi, Mari E.K.; Karjalainen, Juha; Liao, Rachel G.; Neale, Benjamin M.; Daly, Mark; Ganna, Andrea; Pathak, Gita A.; Andrews, Shea J.; Kanai, Masahiro; Veerapen, Kumar; Fernandez-Cadenas, Israel; Schulte, Eva C.; Striano, Pasquale; Afset, Jan Egil; Solligård, Erik; Damås, Jan Kristian; Risnes, Kari; Bettini, Laura Rachele; Gustad, Lise Tuset; Holter, Jan Cato; Hov, Johannes Espolin Roksund; Karlsen, Tom Hemming; Folseraas, Trine; Holten, Aleksander Rygh; Dyrhol-Riise, Anne Ma; Tonby, Kristian; Lind, Andreas; Müller, Fredrik; Dudman, Susanne Gjeruldsen; Grimsrud, Marit Mæhle; Vadla, May Sissel; Myhre, Ronny; Kildal, Anders Benjamin; Hoff, Dag Arne Lihaug; Muller, Karl Erik; Heggelund, Lars; Bergan, Jonas; Skogen, Vegard (Journal article; Peer reviewed, 2021)The genetic make-up of an individual contributes to the susceptibility and response to viral infection. Although environmental, clinical and social factors have a role in the chance of exposure to SARS-CoV-2 and the severity ...