• Antirheumatic treatment is associated with reduced serum Syndecan-1 in Rheumatoid Arthritis 

      Deyab, Gia; Reine, Trine M.; Vuong, Tram Thu; Jenssen, Trond Geir; Hjeltnes, Gunnbjørg; Agewall, Stefan; Mikkelsen, Knut; Førre, Øystein; Fagerland, Morten; Kolset, Svein Olav; Hollan, Ivana (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-07-09)
      The endothelial glycocalyx (EG) is essential for proper function of the endothelium and for vascular integrity, but its role in premature atherogenesis in rheumatoid arthritis (RA) has not been studied yet. EG impairment can play a role in pathogenesis of vascular disease, and one of its characteristics is shedding of syndecan-1 from endothelial cells. Syndecan-1 shedding is mediated by matrix ...
    • The Association Between Adiponectin, Serum Uric Acid and Urinary Markers of Renal Damage in the General Population: Cross-Sectional Data from the Tromsø Study 

      Solbu, Marit Dahl; Norvik, Jon Viljar; Storhaug, Hilde-Merete; Eriksen, Bjørn Odvar; Melsom, Toralf; Eggen, Anne Elise; Zykova, Svetlana; Kronborg, Jens; Jenssen, Trond Geir (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-09-14)
      Background/Aims: Uric acid may cause renal damage, whereas adiponectin in some studies has been reported to have renoprotective properties. The renoprotective role of adiponectin under the influence of hyperuricemia has not been explored. We assessed the cross-sectional association between adiponectin, serum uric acid (SUA) and urinary biomarkers of glomerular and tubular damage (albumin-creatinine ...
    • The association of early post-transplant glucose levels with long term mortality 

      Jenssen, Trond Geir (Journal article; Tidsskriftartikkel; Peer reviewed, 2011)
    • Associations of age with serum insulin, proinsulin and the proinsulin-to-insulin ratio : a crosssectional study 

      Bryhni, Bente; Arnesen, Egil; Jenssen, Trond Geir (Journal article; Tidsskriftartikkel; Peer reviewed, 2010)
    • Beta cell function after weight loss : a clinical trial comparing gastric bypass surgery and intensive lifestyle intervention 

      Hofsø, Dag; Jenssen, Trond Geir; Bollerslev, Jens; Ueland, Thor; Godang, Kristin; Stumvoll, Michael; Sandbu, Rune; Røislien, Jo; Hjelmesæth, Jøran (Journal article; Tidsskriftartikkel; Peer reviewed, 2011)
      The effects of various weight loss strategies on pancreatic beta cell function remain unclear. We aimed to compare the effect of intensive lifestyle intervention (ILI) and Roux-en-Y gastric bypass surgery (RYGB) on beta cell function. Design One year controlled clinical trial (ClinicalTrials.gov identifier NCT00273104). One hundred and nineteen morbidly obese participants without known diabetes from ...
    • Blood pressure and age-related GFR decline in the general population 

      Eriksen, Bjørn Odvar; Stefansson, Vidar Tor Nyborg; Jenssen, Trond Geir; Mathisen, Ulla Dorte; Schei, Jørgen; Solbu, Marit Dahl; Wilsgaard, Tom; Melsom, Toralf (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-02-28)
      Background: <br> Hypertension is one of the most important causes of end-stage renal disease, but it is unclear whether elevated blood pressure (BP) also accelerates the gradual decline in the glomerular filtration rate (GFR) seen in the general population with increasing age. The reason may be that most studies have considered only baseline BP and not the effects of changes in BP, antihypertensive ...
    • Central obesity associates with renal hyperfiltration in the non-diabetic general population: a cross-sectional study 

      Stefansson, Vidar Tor Nyborg; Schei, Jørgen; Jenssen, Trond Geir; Melsom, Toralf; Eriksen, Bjørn Odvar (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-11-10)
      <p><i>Background - </i>Obesity is a risk factor for end-stage renal disease. Renal hyperfiltration, defined as an abnormally high glomerular filtration rate (GFR), is a link in the causal chain between diabetes and chronic kidney disease. Whether obesity is associated with hyperfiltration in the non-diabetic general population, remains unresolved due to a lack of consensus regarding the definition ...
    • Chronic kidney disease in patients with diabetes mellitus 

      Nordheim, Espen; Jenssen, Trond Geir (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-04-29)
      Chronic kidney disease is a common complication and concomitant condition of diabetes mellitus. The treatment of patients with diabetes and chronic kidney disease, including intensive control of blood sugar and blood pressure, has been very similar for type 1 and type 2 diabetes patients. New therapeutic targets have shown promising results and may lead to more specific treatment options for patients ...
    • Correlation between baseline GFR and subsequent change in GFR in Norwegian adults without diabetes and in Pima Indians 

      Melsom, Toralf; Nair, Viji; Schei, Jørgen; Mariani, Laura; Stefansson, Vidar Tor Nyborg; Harder, Jennifer L.; Jenssen, Trond Geir; Solbu, Marit Dahl; Norvik, Jon Viljar; Looker, Helen; Knowler, William C.; Kretzler, Matthias; Nelson, Robert G.; Eriksen, Bjørn Odvar (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-01-28)
      <p><i>Rationale & Objective - </i>An elevated glomerular filtration rate (GFR), or renal hyperfiltration, may predispose individuals to subsequent rapid GFR decline in diabetes, obesity, and metabolic syndrome. Although this hypothesis is supported by results of experimental studies, the importance of hyperfiltration at the population level remains controversial. We investigated whether higher ...
    • Criteria for prediabetes and posttransplant diabetes mellitus after kidney transplantation: A 2-year diagnostic accuracy study of participants from a randomized controlled trial 

      Kurnikowski, Amelie; Nordheim, Espen; Schwaiger, Elisabeth; Krenn, Simon; Harreiter, Jürgen; Kautzky-Willer, Alexandra; Leutner, Michael; Werzowa, Johannes; Tura, Andrea; Budde, Klemens; Eller, Kathrin; Pascual, Julio; Krebs, Michael; Jenssen, Trond Geir; Hecking, Manfred (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-09-01)
      Posttransplant diabetes mellitus (PTDM) and prediabetes (impaired glucose tolerance [IGT] and impaired fasting glucose [IFG]) are associated with cardiovascular events. We assessed the diagnostic performance of fasting plasma glucose (FPG) and HbA<sub>1c</sub> as alternatives to oral glucose tolerance test (OGTT)-derived 2-hour plasma glucose (2hPG) using sensitivity and specificity in 263 kidney ...
    • Cross-sectional analysis of nutrition and serum uric acid in two Caucasian cohorts: the AusDiab Study and the Tromsø study 

      Zykova, Svetlana; Storhaug, Hilde-Merete; Toft, Ingrid; Chadban, Steven; Jenssen, Trond Geir; White, Sarah L (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-05-14)
      Background: Hyperuricemia can lead to gout, and may be a risk factor for cardiovascular events, hypertension, diabetes and renal disease. There is well-known link between gout and habitual intake of meat and seafood, however the association between hyperuricemia and micro-and macro-nutrient intake has not been established. <p>Methods: We studied associations between intakes of food categories, ...
    • Crystallized but not soluble uric acid elicits pro-inflammatory response in short-term whole blood cultures from healthy men 

      Brovold, Henrik; Lund, Trine; Svistounov, Dmitri; Solbu, Marit Dahl; Jenssen, Trond Geir; Ytrehus, Kirsti; Zykova, Svetlana (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-07-19)
      Several epidemiological studies have pointed at serum uric acid (SUA) as an independent risk factor for mortality, diabetes, hypertension, cardiovascular and kidney disease; however, no clear pathogenic pathway is established. Uric acid (UA) crystals show pro-inflammatory properties and can thus create or contribute to the state of chronic low-grade inflammation, a widely accepted pathogenic mechanism ...
    • Development of quantitative assay for simultaneous measurement of purine metabolites and creatinine in biobanked urine by liquid chromatography-tandem mass spectrometry 

      Svistounov, Dmitri; Solbu, Marit Dahl; Jenssen, Trond Geir; Mathisen, Ulla Dorte; Hansen, Terkel; Elgstøen, Katja Benedikte Prestø; Zykova, Svetlana (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-01-20)
      Purine metabolism is essential for all known living creatures, including humans in whom elevated serum concentration of purine break-down product uric acid (UA) is probably an independent risk factor for mortality, type 2 diabetes and cardiovascular events. An automated multiplex assay that measures several purine metabolites could therefore prove useful in many areas of medical, veterinary and ...
    • Effects of AGE inhibition with aminoguanidine in a diabetic db/db mouse wound model 

      Berdal, Margrete; Jenssen, Trond Geir (Journal article; Tidsskriftartikkel; Peer reviewed, 2014)
      Advanced glycation end products (AGEs) react non-enzymatically with tissue proteins to form irreversible structures involved in atherosclerosis, nephropathy, retinopathy, neuropathy, and wound healing. Studies on AGE-inhibitors have demonstrated possible prevention of diabetes complications. The present open label study was conducted on aminoguanidine (AGu), an inhibitor of AGE-formation, to ...
    • Elevated blood pressure is not associated with accelerated glomerular filtration rate decline in the general non-diabetic middle-aged population 

      Eriksen, Bjørn Odvar; Stefansson, Vidar Tor Nyborg; Jenssen, Trond Geir; Mathisen, Ulla Dorte; Schei, Jørgen; Solbu, Marit Dahl; Wilsgaard, Tom; Melsom, Toralf (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-05-14)
      Although hypertension is a risk factor for end-stage renal disease, this complication develops in only a minority of hypertensive patients. Whether non-malignant hypertension itself is sufficient to cause reduced glomerular filtration rate (GFR) is unclear. We investigated whether elevated blood pressure (BP) was associated with accelerated GFR decline in the general population. The study ...
    • Endothelial function after pancreas transplantation - A single-center observational study 

      Nordheim, Espen; Dahle, Dag Olav; Strøm Halden, Thea Anine; Birkeland, Kåre I.; Åsberg, Anders; Hartmann, Anders; Horneland, Rune; Jenssen, Trond Geir (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-02-06)
      <i>Background</i> - Patients with diabetes mellitus treated with successful pancreas transplantation (PTX) normalize hyperglycemia, but are exposed to immunosuppressive drugs that may impair endothelial function. This study aimed to evaluate endothelial function in single PTX recipients.<p><p> <i>Methods</i> - Flow‐mediated dilatation (FMD) in the brachial artery was measured by ultrasound 8 weeks ...
    • Estimated and Measured GFR Associate Differently with Retinal Vasculopathy in the General Population 

      Eriksen, Bjørn Odvar; Løchen, Maja-Lisa; Arntzen, Kjell Arne; Bertelsen, Geir; Eilertsen, Britt-Ann; Hanno, Therese von; Herder, Marit; Jenssen, Trond Geir; Mathisen, Ulla Dorte; Melsom, Toralf; Njølstad, Inger; Solbu, Marit Dahl; Mathiesen, Ellisiv B. (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-11)
      Background/Aims: Estimated GFR (eGFR) is used extensively in epidemiological research. Validations of eGFR have demonstrated acceptable performance, but the dependence of creatinine and cystatin C on non-GFR factors could confound associations with disease. Few studies have investigated this issue in direct comparison with measured GFR (mGFR). We compared the associations between eGFR and mGFR ...
    • Estimated GFR is biased by non-traditional cardiovascular risk factors 

      Melsom, Toralf; Fuskevåg, Ole-Martin; Mathisen, Ulla Dorte; Strand, Harald; Schei, Jørgen; Jenssen, Trond Geir; Solbu, Marit Dahl; Eriksen, Bjørn Odvar (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-01-23)
      Background: Estimated glomerular filtration rate (eGFR) based on either cystatin C or creatinine perform similarly in estimating measured GFR, but associate differently with cardiovascular disease (CVD) and mortality. This could be due to confounding by non-GFRrelated traits associated with cystatin C and creatinine levels. We investigated non-GFRrelated associations between eGFR and two types ...
    • Estimert glomerulær filtrasjonshastighet som mål på nyrefunksjon 

      Heldal, Kristian; Åsberg, Anders; Abedini, Sadollah; Jenssen, Trond Geir; Reisæter, Anna Varberg; Bergan, Stein; Hartmann, Anders (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-12-22)
      Estimert glomerulær filtrasjonshastighet er etablert som klinisk rutinemål for nyrefunksjon, men estimatet har begrensninger og kan ikke brukes i alle kliniske situasjoner. Estimert glomerulær filtrasjonshastighet har en høy variasjonskoeffisient, og ved avvik i pasientens høyde, vekt eller muskelmasse kan estimatet bli unøyaktig. Hvis det er avgjørende å ha et nøyaktig mål på nyrefunksjonen, ...
    • Evaluation of hypoglycaemia with non-invasive sensors in people with type 1 diabetes and impaired awareness of hypoglycaemia 

      Elvebakk, Ole; Tronstad, Christian; Birkeland, Kåre I.; Jenssen, Trond Geir; Bjørgaas, Marit Ragnhild Rokne; Frøslie, Kathrine Frey; Godang, Kristin; Kalvøy, Håvard; Martinsen, Ørjan Grøttem; Gulseth, Hanne Løvdal (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-10-03)
      People with type 1 diabetes and impaired awareness of hypoglycaemia (IAH) are prone to severe hypoglycaemia. Previous attempts to develop non-invasive hypoglycaemia alarm systems have shown promising results, but it is not known if such alarms can detect severe hypoglycaemia in people with IAH. We aimed to explore whether a combination of non-invasive sensors could reliably evaluate hypoglycaemia ...