• Circulating concentrations of biomarkers and metabolites related to Vitamin status, one-carbon and the kynurenine pathways in US, Nordic, Asian, and Australian populations 

      Midttun, Øivind; Theofylaktopoulou, Despoina; Mccann, Adrian; Fanidi, Anouar; Muller, David C.; Meyer, Klaus; Ulvik, Arve; Zheng, Wei; Shu, Xiao-Ou; Xiang, Yong-Bing; Prentice, Ross; Thomson, Cynthia A.; Pettinger, Mary; Giles, Graham G.; Hodge, Allison; Cai, Qiuyin; Blot, William J.; Wu, Jie; Johansson, Mikael; Hultdin, Johan; Grankvist, Kjell; Stevens, Victoria L.; McCullough, Marjorie L.; Weinstein, Stephanie J.; Albanes, Demetrius; Langhammer, Arnulf; Hveem, Kristian; Næss, Marit; Sesso, Howard D.; Gaziano, J. Michael; Buring, Julie E.; Lee, I-Min; Severi, Gianluca; Zhang, Xuehong; Han, Jiali; Stampfer, Meir J.; Smith-Warner, Stephanie A.; Zeleniuch-Jacquotte, Anne; Le Marchand, Loic; Yuan, Jian-Min; Butler, Lesley M.; Koh, Woon-Puay; Wang, Renwei; Gao, Yu-Tang; Ericson, Ulrika; Sonestedt, Emily; Ziegler, Regina G.; Freedman, Neal D.; Visvanathan, Kala; Jones, Miranda R.; Relton, Caroline; Brennan, Paul; Johansson, Mattias; Ueland, Per Magne (Journal article; Peer reviewed, 2017)
      Background: Circulating concentrations of biomarkers that are related to vitamin status vary by factors such as diet, fortification, and supplement use. Published biomarker concentrations have also been influenced by the ...
    • Circulating markers of cellular immune activation in pre-diagnostic blood sample and lung cancer risk in the Lung Cancer Cohort Consortium (LC3) 

      Huang, Joyce Yongxu; Larose, Tricia L; Luu, Hung N; Wang, Renwei; Fanidi, Anouar; Alcala, Karine; Stevens, Victoria L.; Weinstein, Stephanie J.; Albanes, Demetrius; Caporaso, Neil E.; Purdue, Mark P.; Ziegler, Regina G.; Freedman, Neal D.; Lan, Qing; Prentice, Ross L.; Pettinger, Mary; Thomson, Cynthia A.; Cai, Qiuyin; Wu, Jie; Blot, William J.; Shu, Xiao-Ou; Zheng, Wei; Arslan, Alan A.; Zeleniuch-Jacquotte, Anne; Le Marchand, Loïc; Wilkens, Lynn R; Haiman, Christopher A.; Zhang, Xuehong; Stampfer, Meir J.; Han, Jiali; Giles, Graham G.; Hodge, Allison M.; Severi, Gianluca; Johansson, Mikael; Grankvist, Kjell; Langhammer, Arnulf; Hveem, Kristian; Xiang, Yong-Bing; Li, Hong-Lan; Gao, Yu-Tang; Visvanathan, Kala; Ueland, Per Magne; Midttun, Øivind; Ulvik, Arve; Buring, Julie E.; Lee, I-Min; Sesso, Howard D.; Gaziano, J. Michael; Manjer, Jonas; Relton, Caroline; Koh, Woon-Puay; Brennan, Paul; Johansson, Mattias; Yuan, Jian-Min (Journal article; Peer reviewed, 2019)
      Cell‐mediated immune suppression may play an important role in lung carcinogenesis. We investigated the associations for circulating levels of tryptophan, kynurenine, kynurenine:tryptophan ratio (KTR), quinolinic acid (QA) ...
    • A cross-sectional study of inflammatory markers as determinants of circulating kynurenines in the Lung Cancer Cohort Consortium 

      Midttun, Øivind; Ulvik, Arve; Meyer, Klaus; Zahed, Hana; Giles, Graham G.; Manjer, Jonas; Sandsveden, Malte; Langhammer, Arnulf; Sørgjerd, Elin Pettersen; Behndig, Annelie F.; Johansson, Mikael; Freedman, Neal D.; Huang, Wen-Yi; Chen, Chu; Prentice, Ross; Stevens, Victoria L.; Wang, Ying; Le Marchand, Loïc; Weinstein, Stephanie J.; Cai, Qiuyin; Arslan, Alan A.; Chen, Yu; Shu, Xiao-Ou; Zheng, Wei; Yuan, Jian-Min; Koh, Woon-Puay; Visvanathan, Kala; Sesso, Howard D.; Zhang, Xuehong; Gaziano, J. Michael; Fanidi, Anouar; Robbins, Hilary A.; Brennan, Paul; Johansson, Mattias; Ueland, Per Magne (Peer reviewed; Journal article, 2023)
      Circulating concentrations of metabolites (collectively called kynurenines) in the kynurenine pathway of tryptophan metabolism increase during inflammation, particularly in response to interferon-gamma (IFN-γ). Neopterin ...
    • Higher concentrations of kynurenic acid in CSF are associated with the slower clinical progression of Alzheimer's disease 

      Knapskog, Anne Brita; Aksnes, Mari; Edwin, Trine Holt; Ueland, Per Magne; Ulvik, Arve; Fang, Fei; Eldholm, Rannveig Sakshaug; Halaas, Nathalie Bodd; Saltvedt, Ingvild Tina; Solvang, Stein-Erik Hafstad; Watne, Leiv (Peer reviewed; Journal article, 2023)
      INTRODUCTION The kynurenine pathway's (KP) malfunction is closely related to Alzheimer's disease (AD), for antagonistic kynurenic acid (KA) and agonistic quinolinic acid act on the N-methyl-D-aspartate receptor, a ...
    • Investigating novel biomarkers of immune activation and modulation in the context of sedentary behaviour: a multicentre prospective ischemic stroke cohort study 

      Alme, Katinka Nordheim; Askim, Torunn; Assmus, Jörg; Mollnes, Tom Eirik; Naik, Mala; Næss, Halvor; Saltvedt, Ingvild; Ueland, Per-Magne; Ulvik, Arve; Knapskog, Anne-Brita (Peer reviewed; Journal article, 2021)
      Background Sedentary behaviour is associated with disease, but the molecular mechanisms are not understood. Valid biomarkers with predictive and explanatory properties are required. Therefore, we have investigated traditional ...
    • Neopterin and kynurenic acid as predictors of stroke recurrence and mortality: a multicentre prospective cohort study on biomarkers of inflammation measured three months after ischemic stroke 

      Alme, Katinka Nordheim; Ulvik, Arve; Askim, Torunn; Assmus, Jörg; Mollnes, Tom Eirik; Naik, Mala; Næss, Halvor; Saltvedt, Ingvild; Ueland, Per-Magne; Knapskog, Anne Brita (Peer reviewed; Journal article, 2021)
      Background Chronic low-grade inflammation is associated with both ischemic stroke and sedentary behaviour. The aim of this study was to investigate the predictive abilities of biomarkers of inflammation and immune modulation ...
    • 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 (Journal article; Peer reviewed, 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 methylmalonic acid predicts risk of acute myocardial infarction and mortality in patients with coronary heart disease: A prospective 2-cohort study 

      Dhar, Indu; Lysne, Vegard; Ulvik, Arve; Svingen, Gard Frodahl Tveitevåg; Pedersen, Eva Kristine Ringdal; Bjørnestad, Espen Øglænd; Olsen, Thomas; Borsholm, Robert Andre; Laupsa-Borge, Johnny; Ueland, Per Magne; Tell, Grethe Seppola; Berge, Rolf Kristian; Mellgren, Gunnar; Bønaa, Kaare Harald; Nygård, Ottar Kjell (Peer reviewed; Journal article, 2023)
      Background Elevated plasma methylmalonic acid (MMA) is reported in patients with established coronary heart disease (CHD) and is considered a marker of vitamin B12 deficiency. Moreover, MMA-dependent reactions 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)
      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 ...