• Interferon (IFN)-γ-mediated inflammation and the kynurenine pathway in relation to bone mineral density: the Hordaland Health Study 

      Apalset, Ellen M.; Gjesdal, Clara Gram; Ueland, Per Magne; Midttun, Øyvind; Ulvik, Arve; Eide, Geir Egil; Meyer, Klaus; Tell, Grethe Seppola (Peer reviewed; Journal article, 2014-04-24)
      The risk of osteoporosis increases in inflammatory disorders. In cell-mediated immune activation, interferon (IFN)-γ stimulates macrophage release of neopterin and increases the activity of indoleamine 2,3-dioxygenase ...
    • Interferon-γ–induced inflammatory markers and the risk of cancer: The Hordaland Health Study 

      Zuo, Hui; Tell, Grethe Seppola; Vollset, Stein Emil; Ueland, Per Magne; Nygård, Ottar; Midttun, Øivind; Meyer, Klaus; Ulvik, Arve; Eussen, Simone (Peer reviewed; Journal article, 2014-06-19)
      Background It has been reported that interferon-γ (IFN-γ)–induced inflammatory markers, such as circulating neopterin and kynurenine-to-tryptophan ratio (KTR), are increased in patients with cancer and are also a predictor ...
    • Markers of vitamin B6 status and metabolism as predictors of incident cancer: The Hordaland Health Study. 

      Zuo, Hui; Ueland, Per Magne; Eussen, Simone; Tell, Grethe Seppola; Vollset, Stein Emil; Nygård, Ottar; Midttun, Øivind; Meyer, Klaus; Ulvik, Arve (Peer reviewed; Journal article, 2014-11-26)
      Dietary intake and/or circulating concentrations of vitamin B6 have been associated with risk of cancer, but results are inconsistent and mechanisms uncertain. Pyridoxal 5'-phosphate (PLP) is the most commonly used marker ...
    • The PAr index, an indicator reflecting altered vitamin B-6 homeostasis, is associated with long-term risk of stroke in the general population: the Hordaland Health Study (HUSK) 

      Zuo, Hui; Tell, Grethe S.; Ueland, Per Magne; Nygård, Ottar; Vollset, Stein Emil; Midttun, Øivind; Meyer, Klaus; Ulvik, Arve (Peer reviewed; Journal article, 2018-01)
      Background: Vitamin B-6 homeostasis is altered during inflammation and immune activation. It is unknown whether altered vitamin B-6 homeostasis is associated with the risk of stroke. Objective: We investigated the relation ...
    • Plasma Biomarkers of Inflammation, the Kynurenine Pathway, and Risks of All-Cause, Cancer, and Cardiovascular Disease Mortality. The Hordaland Health Study 

      Zuo, Hui; Ueland, Per Magne; Ulvik, Arve; Eussen, Simone; Vollset, Stein Emil; Nygård, Ottar; Midttun, Øivind; Theofylaktopoulou, Despoina; Meyer, Klaus; Tell, Grethe Seppola (Peer reviewed; Journal article, 2016)
      We aimed to evaluate 10 biomarkers related to inflammation and the kynurenine pathway, including neopterin, kynurenine:tryptophan ratio, C-reactive protein, tryptophan, and 6 kynurenines, as potential predictors of all-cause ...
    • Plasma concentrations and dietary intakes of choline and betaine in association with atrial fibrillation risk: Results from 3 prospective cohorts with different health profiles 

      Zuo, Hui; Svingen, Gard Frodahl Tveitevåg; Tell, Grethe S.; Ueland, Per Magne; Vollset, Stein Emil; Pedersen, Eva Ringdal; Ulvik, Arve; Meyer, Klaus; Nordrehaug, Jan Erik; Nilsen, Dennis W.T.; Bønaa, Kaare; Nygård, Ottar (Peer reviewed; Journal article, 2018)
      Background: Although choline metabolism has been associated with atherosclerotic heart disease, less research attention has been paid to the associations of choline and its oxidative metabolite betaine with cardiac ...
    • Plasma methionine, choline, betaine, and dimethylglycine in relation to colorectal cancer risk in the European Prospective Investigation into Cancer and Nutrition (EPIC) 

      Nitter, Mathilde Hjelle; Norgård, Benedicte Wentzel; De Vogel, Stefan; Eussen, Simone; Meyer, Klaus; Ulvik, Arve; Ueland, Per Magne; Nygård, Ottar; Vollset, Stein Emil; Bjørge, Tone; Tjønneland, Anne; Hansen, Louise; Boutron-Ruault, Marie-Christine; Racine, Antoine; Cottet, Vanessa; Kaaks, Rudolf; Kühn, Tilman; Trichopoulou, Antonia; Bamia, Christina; Naska, Androniki; Grioni, Sara; Palli, Domenico; Panico, Salvatore; Tumino, Rosario; Vineis, Paolo; Bueno-de-Mesquita, H. Bas; Van Kranen, Henk J.; Peeters, Petra H. M.; Weiderpass, Elisabete; Dorronsoro, Miren; Jakszyn, Paula; Sánchez, María-José; Argüelles, Marcial Vicente; Huerta, José-Maria; Barricarte, Aurelio; Johansson, Matthias; Ljuslinder, Ingrid; Khaw, Kay Tee; Wareham, Nicholas J.; Freisling, Heinz; Duarte-Salles, Talita; Stepien, Magdalena; Gunter, Mark J.; Riboli, Élio B. (Peer reviewed; Journal article, 2014-08)
      Background Disturbances in one carbon metabolism may contribute to carcinogenesis by affecting methylation and synthesis of DNA. Choline and its oxidation product betaine are involved in this metabolism and can serve as ...
    • Smoking, plasma cotinine and risk of atrial fibrillation: the Hordaland Health Study 

      Zuo, Hui; Nygård, Ottar; Vollset, Stein Emil; Ueland, Per Magne; Ulvik, Arve; Midttun, Øivind; Meyer, Klaus; Igland, Jannicke; Sulo, Gerhard; Tell, Grethe S. (Peer reviewed; Journal article, 2018-01)
      Background: Cigarette smoking has been identified as a major modifiable risk factor for coronary heart disease and mortality. However, findings on the relationship between smoking and atrial fibrillation (AF) have been ...
    • Vitamin B6 catabolism and lung cancer risk: Results from the Lung Cancer Cohort Consortium (LC3) 

      Zuo, Hui; Ueland, Per Magne; Midttun, Øivind; Tell, Grethe S.; Fanidi, Anouar; Zheng, Wei; Shu, Xiao-Ou; Xiang, Yong-Bing; Wu, Jie; Prentice, Ross L.; Pettinger, Mary; Thomson, Cynthia A.; Giles, Graham G.; Hodge, Allison M.; Cai, Qiuyin; Blot, William J.; Johansson, Mikael B.; Hultdin, Johan; Grankvist, Kjell; Stevens, Victoria L.; McCullough, Marjorie L.; Weinstein, Stephanie J.; Albanes, Demetrius; Ziegler, Regina G.; Freedman, Neal David; Caporaso, Neil E.; Langhammer, Arnulf; Hveem, Kristian; Næss, Marit; Buring, Julie E.; Lee, I-Min; Gaziano, John Michael; Severi, Gianluca; Zhang, Xuehong; Stampfer, Meir Jonathan; Han, Jiali; Zeleniuch-Jacquotte, Anne; Marchand, Loïc Le; Yuan, Jian-Min; Wang, Renwei; Koh, Woon-Puay; Gao, Yutang; Ericson, Ulrika C.; Visvanathan, Kala; Jones, Michael R.; Relton, Caroline Laura; Brennan, Paul J.; Johansson, Mattias; Ulvik, Arve (Journal article; Peer reviewed, 2019-03)
      Background Increased vitamin B6 catabolism related to inflammation, as measured by the PAr index (the ratio of 4-pyridoxic acid over the sum of pyridoxal and pyridoxal-5'-phosphate), has been positively associated with ...