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Author (up) Theofylaktopoulou, D.; Midttun, O.; Ueland, P.M.; Meyer, K.; Fanidi, A.; Zheng, W.; Shu, X.-O.; Xiang, Y.-B.; Prentice, R.; Pettinger, M.; Thomson, C.A.; Giles, G.G.; Hodge, A.; Cai, Q.; Blot, W.J.; Wu, J.; Johansson, M.; Hultdin, J.; Grankvist, K.; Stevens, V.L.; McCullough, M.M.; Weinstein, S.J.; Albanes, D.; Ziegler, R.; Freedman, N.D.; Langhammer, A.; Hveem, K.; Naess, M.; Sesso, H.D.; Gaziano, J.M.; Buring, J.E.; Lee, I.-M.; Severi, G.; Zhang, X.; Stampfer, M.J.; Han, J.; Smith-Warner, S.A.; Zeleniuch-Jacquotte, A.; Le Marchand, L.; Yuan, J.-M.; Wang, R.; Butler, L.M.; Koh, W.-P.; Gao, Y.-T.; Rothman, N.; Ericson, U.; Sonestedt, E.; Visvanathan, K.; Jones, M.R.; Relton, C.; Brennan, P.; Johansson, M.; Ulvik, A. url  doi
  Title Impaired functional vitamin B6 status is associated with increased risk of lung cancer Type Journal Article
  Year 2017 Publication International Journal of Cancer Abbreviated Journal Int J Cancer  
  Volume Issue Pages  
  Keywords 3-hydroxykynurenine:xanthurenic acid; Lung Cancer Cohort Consortium; functional vitamin B6 marker; pyridoxal 5'-phosphate  
  Abstract Circulating vitamin B6 levels have been found to be inversely associated with lung cancer. Most studies have focused on the B6 form pyridoxal 5'-phosphate (PLP), a direct biomarker influenced by inflammation and other factors. Using a functional B6 marker allows further investigation of the potential role of vitamin B6 status in the pathogenesis of lung cancer. We prospectively evaluated the association of the functional marker of vitamin B6 status, the 3-hydroxykynurenine:xanthurenic acid (HK:XA) ratio, with risk of lung cancer in a nested case-control study consisting of 5,364 matched case-control pairs from the Lung Cancer Cohort Consortium (LC3). We used conditional logistic regression to evaluate the association between HK:XA and lung cancer, and random effect models to combine results from different cohorts and regions. High levels of HK:XA, indicating impaired functional B6 status, were associated with an increased risk of lung cancer, the odds ratio comparing the fourth and the first quartiles (OR4thvs.1st ) was 1.25 (95% confidence interval, 1.10-1.41). Stratified analyses indicated that this association was primarily driven by cases diagnosed with squamous cell carcinoma. Notably, the risk associated with HK:XA was approximately 50% higher in groups with a high relative frequency of squamous cell carcinoma, i.e., men, former and current smokers. This risk of squamous cell carcinoma was present in both men and women regardless of smoking status.  
  Address Bevital AS, Bergen, Norway  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0020-7136 ISBN Medium  
  Area Expedition Conference  
  Notes PMID:29238985 Approved no  
  Call Number HUNT @ maria.stuifbergen @ Serial 2011  
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