Morten Harald Vatn

• Kalla, Rahul; Adams, Alex T; Nowak, Jan K; Bergemalm, Daniel; Vatn, Simen Svendsen & Ventham, Nicholas T [Show all 20 contributors for this article] (2023). Analysis of Systemic Epigenetic Alterations in Inflammatory Bowel Disease: Defining Geographical, Genetic and Immune-Inflammatory influences on the Circulating Methylome. Journal of Crohn's and Colitis. ISSN 1873-9946. 17(2), p. 170–184. doi: 10.1093/ecco-jcc/jjac127.
• Nowak, Jan K.; Adams, Alex T.; Kalla, Rahul; Lindstrøm, Jonas Christoffer; Vatn, Simen Svendsen & Bergemalm, Daniel [Show all 15 contributors for this article] (2022). Characterisation of the Circulating Transcriptomic Landscape in Inflammatory Bowel Disease Provides Evidence for Dysregulation of Multiple Transcription Factors Including NFE2, SPI1, CEBPB, and IRF2. Journal of Crohn's and Colitis. ISSN 1873-9946. 16(8), p. 1255–1268. doi: 10.1093/ecco-jcc/jjac033. Full text in Research Archive
• Vatn, Simen Svendsen; Lindstrøm, Jonas Christoffer; Moen, Aina Elisabeth Fossum; Brackmann, Stephan Andreas; Tannæs, Tone Møller & Olbjørn, Christine [Show all 19 contributors for this article] (2022). Mucosal Gene Transcript Signatures in Treatment Naïve Inflammatory Bowel Disease: A Comparative Analysis of Disease to Symptomatic and Healthy Controls in the European IBD-Character Cohort. Clinical and Experimental Gastroenterology. ISSN 1178-7023. 15, p. 5–25. doi: 10.2147/CEG.S343468. Full text in Research Archive
• Monstad, Iril Lovise; Solberg, Inger Camilla; Småstuen, Milada Cvancarova; Hovde, Oistein; Henriksen, Magne & Huppertz-Hauss, Gert [Show all 12 contributors for this article] (2021). Outcome of Ulcerative Colitis 20 Years after Diagnosis in a Prospective Population-based Inception Cohort from South-Eastern Norway, the IBSEN Study. Journal of Crohn's and Colitis. ISSN 1873-9946. 15(6), p. 969–979. doi: 10.1093/ecco-jcc/jjaa232. Full text in Research Archive Show summary

  Background and aims: The long-term course of ulcerative colitis [UC] is difficult to predict. Mortality, colectomy, cancer, and hospitalisation represent hard outcomes of disease. Moreover, knowledge on the risk of relapses and need for potent medication add important information about living with UC. We aimed to evaluate the course and prognosis of UC during the first 20 years after diagnosis, and to identify early prognostic risk factors. Methods: From 1990 to 1994, a population-based inception cohort of patients with inflammatory bowel disease was enrolled in South-Eastern Norway. A systematic follow-up [FU] was conducted at 1,5, 10, and 20 years after diagnosis. Clinical outcomes were recorded continuously, and possible relationships between early disease characteristics and outcomes were analysed using multiple regression analysis. Results: Among 519 UC patients, 119 died, 60 were lost to FU, and 340 were included in the FU cohort. The 20-year cumulative risk of colectomy was 13.0% (95% confidence interval [CI] [11.4-14.6]). Extensive colitis at diagnosis was independently associated with an increased risk of colectomy compared with proctitis (hazard ratio [HR] = 2].8, 95% CI [1.3-6.1]). In contrast, mucosal healing at 1-year FU was independently associated with reduced risk of colectomy [HR = 0.4, 95% CI [0.2-0.8]), and inversely associated with subsequent risk of relapse [adjusted HR = 0.5, 95% CI [0.3-0.7]). Conclusions: The overall risk of colectomy in our cohort was lower than expected from previous studies, although considerable for patients with extensive colitis at diagnosis. Early mucosal healing was associated with better disease outcomes 20 years after diagnosis.

• Vatn, Simen Svendsen; Carstens, Adam; Kristoffersen, Anja Bråthen; Bergemalm, Daniel; Casen, Christina & Moen, Aina Elisabeth Fossum [Show all 19 contributors for this article] (2020). Faecal microbiota signatures of IBD and their relation to diagnosis, disease phenotype, inflammation, treatment escalation and anti-TNF response in a European Multicentre Study (IBD-Character). Scandinavian Journal of Gastroenterology. ISSN 0036-5521. 55(10), p. 1146–1156. doi: 10.1080/00365521.2020.1803396. Full text in Research Archive
• Kalla, Rahul; Adams, Alex T.; Ventham, Nicholas T.; Kennedy, Nicholas A.; White, R. & Clark, C [Show all 21 contributors for this article] (2020). Whole blood profiling of T-cell derived miRNA allows the development of prognostic models in inflammatory bowel disease . Journal of Crohn's and Colitis. ISSN 1873-9946. 14(12), p. 1724–1733. doi: 10.1093/ecco-jcc/jjaa134. Full text in Research Archive
• Kalla, Rahul; Adams, Alex T.; Bergemalm, Daniel; Vatn, Simen Svendsen; Kennedy, Nicholas A. & Ricanek, Petr [Show all 22 contributors for this article] (2020). Serum proteomic profiling at diagnosis predicts clinical course, and need for intensification of treatment in inflammatory bowel disease. Journal of Crohn's and Colitis. ISSN 1873-9946. p. 1–33. doi: 10.1093/ecco-jcc/jjaa230. Full text in Research Archive
• Kristensen, Vendel Ailin; Småstuen, Milada Cvancarova; Høivik, Marte Lie; Moum, Bjørn & Vatn, Morten H (2020). Serological antibodies and surgery in a population-based inception cohort of Crohn's disease patients - the IBSEN study. Scandinavian Journal of Gastroenterology. ISSN 0036-5521. doi: 10.1080/00365521.2020.1745879.
• Klepp, Pasquale Catherine; Brackmann, Stephan; Småstuen, Milada Cvancarova; Høivik, Marte Lie; Hovde, Øistein & Henriksen, Magne [Show all 15 contributors for this article] (2020). Risk of colorectal cancer in a population-based study 20 years after diagnosis of ulcerative colitis: results from the IBSEN study. BMJ open gastroenterology. ISSN 2054-4774. 7. doi: 10.1136/bmjgast-2019-000361. Full text in Research Archive Show summary

  Objective The association between ulcerative colitis (UC) and colorectal cancer (CRC) is widely accepted, although attenuated risk has been reported in recent years. Colonoscopic surveillance is recommended with intervals based on established clinical risk factors. Nevertheless, a significant number of patients develop interval cancers, indicating the need of improved individualised assessment. In the present study, we evaluated clinical risk factors associated with CRC during a prescheduled follow-up 20 years after diagnosis, the IBSEN study. Design A population-based inception cohort of patients diagnosed with inflammatory bowel disease from 1 January 1990 until 31 December 1993, prospectively followed at 1, 5, 10 and 20 years after diagnosis. A total of 517 patients with UC were included; 264 (51 %) men; median age at inclusion 37.4 years (4–88). Results The overall incidence of CRC was 1.6% (8/517) at a 20-year follow-up. The total lifetime risk of CRC prior to or after UC diagnosis was 2.3%. (12/517). Patients older than 70 years at diagnosis had a 15-fold higher risk of CRC compared with those diagnosed when younger than 40 years, with HR 15.68 (95% CI: 1.31 to 187.92). Neither sex, first-degree relative with CRC, extent of colitis nor primary sclerosing cholangitis affected the risk of CRC. Conclusion The risk of CRC in UC was low and comparable with the risk of CRC in the background population of Norway.

• Garshol, Bjørnar Finnanger; Aamodt, Geir; Madsen, Christian; Vatn, Morten & Bengtson, May-Bente (2020). The effect of nitrogen dioxide on low birth weight in women with inflammatory bowel disease: a Norwegian pregnancy cohort study (MoBa). Scandinavian Journal of Gastroenterology. ISSN 0036-5521. 55(3), p. 272–278. doi: 10.1080/00365521.2020.1726446. Full text in Research Archive Show summary

  Background: Adverse birth outcomes are more frequent among mothers with inflammatory bowel diseases (IBDs) than non-IBD mothers. In recent studies, air pollution, such as high concentrations of nitrogen dioxide (NO2), is reckoned as a risk factor for preterm birth in the general population. In this study, we investigated whether IBD mothers are at higher risk of preterm birth when exposed to NO2 compared to non-IBD mothers. Methods: We used information from the Norwegian Mother, Father and Child Cohort Study (MoBa). The pregnancy cohort was linked to the Norwegian Medical Birth Registry and air-pollution exposure data available from a subset of the study cohort. The relevant outcome in this study was preterm birth. A total of 16,170 non-IBD and 92 IBD mothers were included in the study. Results: The mean exposure of NO2 during the pregnancy was similar for IBD and non-IBD mothers, 13.7 (6.9) μg/m3 and 13.6 (4.2) μg/m3, respectively. IBD mothers with higher exposure of NO2 in the second and third trimester were at significant risk of preterm birth compared to non-IBD mothers [OR = 1.28 (CI 95%: 1.04–1.59) and OR = 1.23 (95% CI: 1.06–1.43), respectively]. The mean NO2 exposure was significantly higher in IBD mothers with preterm birth than in IBD mothers who delivered at term, at 19.58 (1.57) μg/m3 and 12.89 (6.37) μg/m3, respectively. Conclusions: NO2 exposure influenced the risk of preterm birth in IBD mothers. Higher risk of preterm birth in IBD was associated with higher exposure of NO2, suggesting vulnerability of preterm birth in IBD when exposed to NO2.

• Bengtson, May-Bente; Haugen, Margaretha; Brantsæter, Anne Lise; Aamodt, Geir & Vatn, Morten H (2020). Intake of dairy protein during pregnancy in IBD and risk of SGA in a Norwegian population-based mother and child cohort. BMC Gastroenterology. ISSN 1471-230X. 20. doi: 10.1186/s12876-020-1182-y. Full text in Research Archive
• Olbjørn, Christine; Småstuen, Milada Cvancarova; Thiis-Evensen, Espen; Nakstad, Britt; Vatn, Morten H & Jahnsen, Jørgen [Show all 20 contributors for this article] (2019). Fecal microbiota profiles in treatment-naive pediatric inflammatory bowel disease ? associations with disease phenotype, treatment, and outcome. Clinical and Experimental Gastroenterology. ISSN 1178-7023. 12, p. 37–49. doi: 10.2147/CEG.S186235. Full text in Research Archive
• Lunder, Aida Kapic; Bakstad, Linda Tøften; Jahnsen, Jørgen; Borthne, Arne Sigmund; Hov, Johannes Espolin Roksund & Vatn, Morten H [Show all 7 contributors for this article] (2019). Assessment of Bowel Inflammation and Strictures by Magnetic Resonance Enterography in Long-term Crohn´s Disease. Journal of Crohn's and Colitis. ISSN 1873-9946. 13(5), p. 607–614. doi: 10.1093/ecco-jcc/jjy208.
• Tronstad, Rune Rose; Polushina, Tatiana; Brattbakk, Hans-Richard; Stansberg, Christine; Volkmann, Hilde Løland Von & Hanevik, Kurt [Show all 19 contributors for this article] (2018). Genetic and transcriptional analysis of inflammatory bowel disease-associated pathways in patients with GUCY2C-linked familial diarrhea. Scandinavian Journal of Gastroenterology. ISSN 0036-5521. 53(10-11), p. 1264–1273. doi: 10.1080/00365521.2018.1521867.
• Ossum, Alvilde Maria; Palm, Øyvind; Småstuen, Milada Cvancarova; Solberg, Inger Camilla; Vatn, Morten H & Moum, Bjørn [Show all 7 contributors for this article] (2018). Peripheral arthritis in patients with long-term inflammatory bowel disease. Results from 20 years of follow-up in the IBSEN study. Scandinavian Journal of Gastroenterology. ISSN 0036-5521. p. 1–8. doi: 10.1080/00365521.2018.1518482. Show summary

  Objectives: Peripheral arthritis and related musculoskeletal manifestations, often classified as peripheral spondyloarthritis, are frequently seen in patients with inflammatory bowel disease (IBD). Few long-term studies have reported on the prevalence of these conditions. The aim of this study was to determine the prevalence of IBD-related peripheral arthritis and peripheral spondyloarthritis in IBD patients during 20 years of disease course, and to assess whether these conditions were associated with the intestinal IBD severity and activity. Materials and methods: In an inception cohort (the IBSEN study), IBD patients were followed prospectively for 20 years. At the 5 year follow-up the patients underwent a rheumatological examination and at the 20 year follow-up they completed a questionnaire with identical questions. When peripheral arthritis was characteristic and not explained by other specific diagnoses, it was defined as IBDrelated peripheral arthritis. The Assessment of Spondyloarthritis International Society criteria were used to define peripheral spondyloarthritis, including patients with peripheral arthritis, enthesitis and/ or dactylitis. Results: After 20 years of follow-up, 441 patients were included (296 ulcerative colitis and 145 Crohn’s disease). The prevalence of IBD-related peripheral arthritis was 17.2% and peripheral spondyloarthritis 27.9% during the disease course. IBD severity and activity were not different between those with a history of IBD-related peripheral arthritis or peripheral spondyloarthritis and those without. A higher proportion of women had IBD-related peripheral arthritis and peripheral spondyloarthritis. Conclusion: During 20 years of disease course, more than every sixth patient had suffered from IBDrelated peripheral arthritis and every fourth from peripheral spondyloarthritis.

• Moen, Aina Elisabeth Fossum; Lindstrøm, Jonas Christoffer; Tannæs, Tone Møller; Vatn, Simen Svendsen; Ricanek, Petr & Vatn, Morten H [Show all 8 contributors for this article] (2018). The prevalence and transcriptional activity of the mucosal microbiota of ulcerative colitis patients. Scientific Reports. ISSN 2045-2322. 8:17278. doi: 10.1038/s41598-018-35243-4. Full text in Research Archive
• Klepp, Pasquale Catherine; Tollisen, Anita; Røseth, Arne; Småstuen, Milada Cvancarova; Andersen, Solveig Norheim & Vatn, Morten H [Show all 8 contributors for this article] (2018). Real-life chromoendoscopy for dysplasia surveillance in ulcerative colitis. World Journal of Gastroenterology (WJG). ISSN 1007-9327. 24(35), p. 4069–4076. doi: 10.3748/wjg.v24.i35.4069. Full text in Research Archive
• Holme, Øyvind; Løberg, Magnus; Kalager, Mette; Bretthauer, Michael; Hernán, Miguel A. & Aas, Eline [Show all 14 contributors for this article] (2018). Long-term effectiveness of sigmoidoscopy screening on colorectal cancer incidence and mortality in women and men: A randomized trial. Annals of Internal Medicine. ISSN 0003-4819. 168(11), p. 775–782. doi: 10.7326/M17-1441. Full text in Research Archive
• Klepp, Pasquale Catherine; Kisiel, John; Småstuen, Milada Cvancarova; Røseth, Arne; Andersen, Solveig Norheim & Vatn, Morten H [Show all 9 contributors for this article] (2018). Multi-target stool DNA test in the surveillance of inflammatory bowel disease: a cross-sectional cohort study. Scandinavian Journal of Gastroenterology. ISSN 0036-5521. 53(3), p. 273–278. doi: 10.1080/00365521.2018.1424935.
• Kapica, Aida; Jahnsen, Jørgen; Bakstad, Linda Tøften; Borthne, Arne Sigmund; Hov, Johannes Espolin Roksund & Vatn, Morten H [Show all 7 contributors for this article] (2018). Bowel Damage in Patients With Long-term Crohn's Disease, Assessed by Magnetic Resonance Enterography and the Lemann Index. Clinical Gastroenterology and Hepatology. ISSN 1542-3565. 16(1), p. 75–82.e5. doi: 10.1016/j.cgh.2017.06.053.
• Myklebust-Hansen, Thea; Aamodt, Geir; Haugen, Margaretha; Brantsæter, Anne Lise; Vatn, Morten H & Bengtson, May-Bente (2018). Dietary Patterns in women with Inflammatory Bowel Disease and Risk of Adverse Pregnancy Outcomes: Results from the Norwegian Mother and Child Cohort Study (MoBa). Inflammatory Bowel Diseases. ISSN 1078-0998. 24(1), p. 12–24. doi: 10.1093/ibd/izx006.
• Vesterhus, Mette; Holm, Anders; Hov, Johannes Espolin Roksund; Nygård, Ståle; Schrumpf, Erik & Melum, Espen [Show all 23 contributors for this article] (2017). Novel serum and bile protein markers predict primary sclerosing cholangitis disease severity and prognosis. Journal of Hepatology. ISSN 0168-8278. 66(6), p. 1214–1222. doi: 10.1016/j.jhep.2017.01.019.
• Bengtson, May-Bente; Aamodt, Geir; Mahadevan, Uma & Vatn, Morten H (2017). Inadequate Gestational Weight Gain, the Hidden Link Between Maternal IBD and Adverse Pregnancy Outcomes: Results from the Norwegian Mother and Child Cohort Study. Inflammatory Bowel Diseases. ISSN 1078-0998. 23(7), p. 1225–1233. doi: 10.1097/MIB.0000000000001123. Full text in Research Archive
• Bengtson, May-Bente; Martin, Christopher F; Aamodt, Geir; Vatn, Morten H & Mahadevan, Uma (2017). Inadequate Gestational Weight Gain Predicts Adverse Pregnancy Outcomes in Mothers with Inflammatory Bowel Disease: Results from a Prospective US Pregnancy Cohort. Digestive Diseases and Sciences. ISSN 0163-2116. 62(8), p. 2063–2069. doi: 10.1007/s10620-017-4547-5. Full text in Research Archive
• Hov, Johannes Espolin Roksund; Boberg, Kirsten Muri; Taraldsrud, Eli; Vesterhus, Mette; Boyadzhieva, Maria & Solberg, Inger Camilla [Show all 11 contributors for this article] (2017). Antineutrophil antibodies define clinical and genetic subgroups in primary sclerosing cholangitis. Liver international (Print). ISSN 1478-3223. 37(3), p. 458–465. doi: 10.1111/liv.13238.
• Olbjørn, Christine; Småstuen, Milada Cvancarova; Thiis-Evensen, Espen; Nakstad, Britt; Vatn, Morten H & Perminow, Gøri Margrete (2017). Serological markers in diagnosis of pediatric inflammatory bowel disease and as predictors for early tumor necrosis factor blocker therapy. Scandinavian Journal of Gastroenterology. ISSN 0036-5521. 52(4), p. 414–419. doi: 10.1080/00365521.2016.1259653. Full text in Research Archive
• Ventham, NT; Kennedy, NA; Adams, AT; Kalla, R; Heath, S & O'Leary, KR [Show all 107 contributors for this article] (2016). Integrative epigenome-wide analysis demonstrates that DNA methylation may mediate genetic risk in inflammatory bowel disease. Nature Communications. ISSN 2041-1723. 7. doi: 10.1038/ncomms13507.
• Moen, Aina Elisabeth Fossum; Tannæs, Tone Møller; Vatn, Simen Svendsen; Ricanek, Petr; Vatn, Morten H & Jahnsen, Jørgen [Show all 7 contributors for this article] (2016). Simultaneous purification of DNA and RNA from microbiota in a single colonic mucosal biopsy. BMC Research Notes. ISSN 1756-0500. 9(328). doi: 10.1186/s13104-016-2110-7.
• Kapica, Aida; Hov, Johannes Espolin Roksund; Borthne, Arne Sigmund; Gleditsch, Jostein; Johannesen, Glenn & Tveit, Knut [Show all 19 contributors for this article] (2016). Prevalence of Sclerosing Cholangitis Detected by Magnetic Resonance Cholangiography in Patients With Long-term Inflammatory Bowel Disease. Gastroenterology. ISSN 0016-5085. 151(4), p. 660–669. doi: 10.1053/j.gastro.2016.06.021.
• Kevans, David; Tyler, Andrea D.; Holm, Kristian; Jørgensen, Kristin Kaasen; Vatn, Morten H & Karlsen, Tom Hemming [Show all 11 contributors for this article] (2016). Characterization of Intestinal Microbiota in Ulcerative Colitis Patients with and without Primary Sclerosing Cholangitis. Journal of Crohn's and Colitis. ISSN 1873-9946. 10(3), p. 330–337. doi: 10.1093/ecco-jcc/jjv204.
• Casén, C.; Vebø, H. C.; Sekelja, Monika; Hegge, Finn Terje; Karlsson, Magdalena Kauczynska & Ciemniejewska, E. [Show all 17 contributors for this article] (2015). Deviations in human gut microbiota: A novel diagnostic test for determining dysbiosis in patients with IBS or IBD. Alimentary Pharmacology and Therapeutics. ISSN 0269-2813. 42(1), p. 71–83. doi: 10.1111/apt.13236.
• Vatn, Morten H & Sandvik, Arne Kristian (2015). Inflammatory bowel disease. Scandinavian Journal of Gastroenterology. ISSN 0036-5521. 50(6), p. 748–762. doi: 10.3109/00365521.2015.1033000. Full text in Research Archive
• Bengtson, May-Bente; Aamodt, Geir; Vatn, Morten H & Harris, Jennifer (2015). Co-occurrence of IBS and symptoms of anxiety or depression, among Norwegian twins, is influenced by both heredity and intrauterine growth. BMC Gastroenterology. ISSN 1471-230X. 15(1). doi: 10.1186/s12876-015-0237-y. Full text in Research Archive
• Ricanek, Petr; Lunde, Lisa Kristina; Frye, Stephan Alfons; Støen, Mari; Nygård, Ståle & Morth, Jens Preben [Show all 10 contributors for this article] (2015). Reduced expression of aquaporins in human intestinal mucosa in early stage inflammatory bowel disease. Clinical and Experimental Gastroenterology. ISSN 1178-7023. 8, p. 49–67. doi: 10.2147/CEG.S70119.
• Beisner, Julia; Teltschik, Zora; Ostaff, Maureen J.; Tiemessen, Machteld M; Staal, Frank J. T. & Wang, Guoxing [Show all 12 contributors for this article] (2014). TCF-1-mediated Wnt signaling regulates Paneth cell innate immune defense effectors HD-5 and -6: Implications for Crohn's disease. American Journal of Physiology - Gastrointestinal and Liver Physiology. ISSN 0193-1857. 307(5), p. G487–G498. doi: 10.1152/ajpgi.00347.2013.
• Olbjørn, Christine; Nakstad, Britt; Småstuen, Milada Cvancarova; Thiis-Evensen, Espen; Vatn, Morten H & Perminow, Gøri Margrete (2014). Early anti-TNF treatment in pediatric Crohn's disease. Predictors of clinical outcome in a population-based cohort of newly diagnosed patients. Scandinavian Journal of Gastroenterology. ISSN 0036-5521. 49(12), p. 1425–1431. doi: 10.3109/00365521.2014.966316. Full text in Research Archive
• Cetinkaya, Raziye; Vatn, Morten H; Aabakken, Lars; Bergestuen, Deidi Ann & Thiis-Evensen, Espen (2014). Survival and prognostic factors in well-differentiated pancreatic neuroendocrine tumors. Scandinavian Journal of Gastroenterology. ISSN 0036-5521. 49(6), p. 734–741. doi: 10.3109/00365521.2014.903432.
• Solberg, Inger Camilla; Småstuen, Milada Cvancarova; Vatn, Morten H; Moum, Bjørn; Lygren, Idar & Jahnsen, Jørgen [Show all 11 contributors for this article] (2014). Risk matrix for prediction of advanced disease in a population-based study of patients with Crohn's Disease (the IBSEN Study). Inflammatory Bowel Diseases. ISSN 1078-0998. 20(1), p. 60–68. doi: 10.1097/01.MIB.0000436956.78220.67.
• Block, M; Jørgensen, Kristin Kaasen; Øresland, Tom; Lindholm, E; Grzyb, Krzysztof & Småstuen, Milada Cvancarova [Show all 9 contributors for this article] (2014). Colectomy for patients with ulcerative colitis and primary sclerosing cholangitis - What next? Journal of Crohn's and Colitis. ISSN 1873-9946. 8(5), p. 421–430. doi: 10.1016/j.crohns.2013.10.008.
• Pollheimer, Jürgen; Bodin, Johanna; Sundnes, Olav; Bekkeheien, Reidunn C; Skånland, Sigrid Strand & Sponheim, Jon [Show all 16 contributors for this article] (2013). Interleukin-33 drives a proinflammatory endothelial activation that selectively targets nonquiescent cells. Arteriosclerosis, Thrombosis and Vascular Biology. ISSN 1079-5642. 33(2), p. e47–e55. doi: 10.1161/ATVBAHA.112.253427.
• Haugland, Trude; Veenstra, Marijke; Vatn, Morten H & Wahl, Astrid Klopstad (2013). Improvement in Stress, General Self-Efficacy, and HealthRelated Quality of Life following Patient Education for Patientswith Neuroendocrine Tumors: A Pilot Study. Nursing Research and Practice. ISSN 2090-1429. 2013. doi: 10.1155/2013/695820.
• Thorkildsen, Lill-Therese; Nwosu, Felix; Avershina, Ekaterina; Ricanek, Petr; Perminow, Gøri Margrete & Brackmann, Stephan [Show all 8 contributors for this article] (2013). Dominant Fecal Microbiota in Newly Diagnosed Untreated Inflammatory Bowel Disease Patients. Gastroenterology Research and Practice. ISSN 1687-6121. doi: 10.1155/2013/636785.
• Rogler, Gerhard; Aldeguer, Xavier; Kruis, Wolfgang; Lasson, Anders; Mittmann, Ulrich & Nally, Ken [Show all 11 contributors for this article] (2013). Concept for a rapid point-of-care calprotectin diagnostic test for diagnosis and disease activity monitoring in patients with inflammatory bowel disease: Expert clinical opinion. Journal - Crohn's and Colitis Foundation of Canada. ISSN 1197-4982. 7(8), p. 670–677. doi: 10.1016/j.crohns.2013.02.014.
• Ellinghaus, David; Zhang, Hu; Zeissig, Sebastian; Lipinski, Simone; Till, Andreas & Jiang, Tao [Show all 61 contributors for this article] (2013). Association between variants of PRDM1 and NDP52 and Crohn's Disease, based on exome sequencing and functional studies. Gastroenterology. ISSN 0016-5085. 145(2), p. 339–347. doi: 10.1053/j.gastro.2013.04.040.
• Liu, Jimmy Z.; Hov, Johannes Espolin Roksund; Folseraas, Trine; Ellinghaus, E; Rushbrook, SM & Doncheva, NT [Show all 84 contributors for this article] (2013). Dense genotyping of immune-related disease regions identifies nine new risk loci for primary sclerosing cholangitis. Nature Genetics. ISSN 1061-4036. 45(6), p. 670–675. doi: 10.1038/ng.2616.
• Aamodt, Geir; Bengtson, May-Bente & Vatn, Morten H (2013). Can temperature explain the latitudinal gradient of ulcerative colitis? Cohort of Norway. BMC Public Health. ISSN 1471-2458. 13. doi: 10.1186/1471-2458-13-530. Full text in Research Archive
• Jørgensen, Kristin Kaasen; Lindstrøm, Lina; Småstuen, Milada Cvancarova; Karlsen, Tom Hemming; Castedal, Maria & Friman, Styrbjörn [Show all 15 contributors for this article] (2013). Immunosuppression after liver transplantation for primary sclerosing cholangitis influences activity of inflammatory bowel disease. Clinical Gastroenterology and Hepatology. ISSN 1542-3565. 11(5), p. 517–523. doi: 10.1016/j.cgh.2012.12.027.
• Nwosu, Felix; Thorkildsen, Lill-Therese; Avershina, Ekaterina; Ricanek, Petr; Perminow, Gøri Margrete & Brackmann, Stephan [Show all 8 contributors for this article] (2013). Age-Dependent Fecal Bacterial Correlation to Inflammatory Bowel Disease for Newly Diagnosed Untreated Children. Gastroenterology Research and Practice. ISSN 1687-6121. doi: 10.1155/2013/302398. Full text in Research Archive
• Rolny, Peter & Vatn, Morten H (2013). Cyclosporine in patients with severe steroid refractory ulcerative colitis in the era of infliximab. Review article. Scandinavian Journal of Gastroenterology. ISSN 0036-5521. 48(2), p. 131–135. doi: 10.3109/00365521.2012.733954.
• Ng, Siew C.; Bernstein, Charles N.; Vatn, Morten H; Lakatos, Peter Laszlo; Loftus Jr, Edward V. & Tysk, Curt [Show all 9 contributors for this article] (2013). Geographical variability and environmental risk factors in inflammatory bowel disease. Gut. ISSN 0017-5749. 62(4), p. 630–649. doi: 10.1136/gutjnl-2012-303661.
• Ellinghaus, David; Folseraas, Trine; Holm, Kristian; Ellinghaus, Eva; Melum, Espen & Balschun, Tobias [Show all 37 contributors for this article] (2013). Genome-wide association analysis in Primary sclerosing cholangitis and ulcerative colitis identifies risk loci at GPR35 and TCF4. Hepatology. ISSN 0270-9139. 58(3), p. 1074–1083. doi: 10.1002/hep.25977.
• Ricanek, Petr; Lothe, Sheba Maria; Frye, Stephan Alfons; Rydning, Andreas; Vatn, Morten H & Tønjum, Tone (2012). Gut bacterial profile in patients newly diagnosed with treatment-naïve Crohn's disease. Clinical and Experimental Gastroenterology. ISSN 1178-7023. 5, p. 173–186. doi: 10.2147/CEG.S33858. Show summary

  OBJECTIVES: The aim of this study was to define the composition of the gut bacterial flora in Norwegian patients with early stage Crohn's disease (CD). METHODS: By using a nonselective metagenomics approach, the general bacterial composition in mucosal biopsies from the ileum and the colon of five subjects, four patients with different phenotypes of CD, and one noninflammatory bowel disease control, was characterized. After partial 16S ribosomal RNA (rRNA) gene sequencing, BLAST homology searches for species identification and phylogenetic analysis were performed. RESULTS: An overall biodiversity of 106 different bacterial operational taxonomic units (OTUs) was detected in the cloned libraries. Nearly all OTUs belonged to the phylae Bacteroidetes (42% in CD, 71% in the control) or Firmicutes (42% in CD, 28% in the control), except for some OTUs that belonged to the phylum Proteobacteria (15% in CD, 0% in the control) and a few OTUs that could not be assigned to a phylum (2% in CD, 1% in the control). CONCLUSION: Based on the high incidence of inflammatory bowel disease (IBD) in Norway, this pilot study represents a relevant determination of the gut microbiota in Norwegian patients compared to previous findings in other countries. The bacterial profile of Norwegian CD patients was found to be similar to that of CD patients in other countries. The findings do not support a particular bacterial composition as a predominant causative factor for the high incidence of IBD that exists in some countries.

• Berstad, Paula Marianna; Thiis-Evensen, Espen; Vatn, Morten H & Almendingen, Kari (2012). Fatty Acids in Habitual Diet, Plasma Phospholipids, and Tumour and Normal Colonic Biopsies in Young Colorectal Cancer Patients. Journal of Oncology. ISSN 1687-8450. doi: 10.1155/2012/254801.
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• Jørgensen, Kristin Kaasen; Grzyb, Krzysztof; Lundin, Knut E A; Clausen, Ole Petter Fraas; Aamodt, Geir & Schrumpf, Erik [Show all 8 contributors for this article] (2012). Inflammatory bowel disease in patients with primary sclerosing cholangitis: clinical characterization in liver transplanted and non transplanted pateints. Inflammatory Bowel Diseases. ISSN 1078-0998. 18(3), p. 536–545. doi: 10.1002/ibd.21699.
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• Ricanek, Petr; Brackmann, Stephan; Perminow, Gøri Margrete; Lyckander, Lars Gustav; Sponheim, Jon & Holme, Øyvind [Show all 9 contributors for this article] (2011). Evaluation of disease activity in IBD at the time of diagnosis by the use of clinical, biochemical, and fecal markers. Scandinavian Journal of Gastroenterology. ISSN 0036-5521. 46(9), p. 1081–1091. doi: 10.3109/00365521.2011.584897.
• Franke, Andre; Balschun, Tobias; Sina, Christina; Ellinghaus, David; Hasler, Robert & Mayr, Gabriele [Show all 27 contributors for this article] (2010). Genome-wide association study for ulcerative colitis identifies risk loci at 7q22 and 22q13 (IL17REL). Nature Genetics. ISSN 1061-4036. 42(4), p. 292–294. doi: 10.1038/ng.553.
• Berg, Marianne; Danielsen, Stine Aske; Ahlquist, Terje Cruickshank; Merok, Marianne Aarstad; Ågesen, Trude Holmeide & Vatn, Morten H [Show all 17 contributors for this article] (2010). DNA Sequence Profiles of the Colorectal Cancer Critical Gene Set KRAS-BRAF-PIK3CA-PTEN-TP53 Related to Age at Disease Onset. PLOS ONE. ISSN 1932-6203. 5(11). doi: 10.1371/journal.pone.0013978.
• Ricanek, Petr; Lothe, Sheba Maria; Szpinda, Irena; Jorde, Anne Tomine; Brackmann, Stephan & Perminow, Gøri [Show all 10 contributors for this article] (2010). Paucity of mycobacteria in mucosal bowel biopsies from adults and children with early inflammatory bowel disease. Journal - Crohn's and Colitis Foundation of Canada. ISSN 1197-4982. 4(5), p. 561–566. doi: 10.1016/j.crohns.2010.05.003.
• Sponheim, Jon; Pollheimer, Jürgen; Olsen, Trine; Balogh, Eva Johanna; Hammarström, Clara & Loos, Tamara [Show all 12 contributors for this article] (2010). Inflammatory Bowel Disease-Associated Interleukin-33 Is Preferentially Expressed in Ulceration-Associated Myofibroblasts. American Journal of Pathology. ISSN 0002-9440. 177(6), p. 2804–2815. doi: 10.2353/ajpath.2010.100378.
• Bergestuen, Deidi Ann; Edvardsen, Thor; Aakhus, Svend; Ueland, Thor; Øie, Erik & Vatn, Morten H [Show all 8 contributors for this article] (2010). Activin A in Carcinoid Heart Disease: A Possible Role in Diagnosis and Pathogenesis. Neuroendocrinology. ISSN 0028-3835. 92(3), p. 168–177. doi: 10.1159/000318014.
• Hov, Johannes Espolin Roksund; Keitel, V; Lærdahl, Jon Kristen; Spomer, L; Ellinghaus, E & ElSharawy, A [Show all 36 contributors for this article] (2010). Mutational Characterization of the Bile Acid Receptor TGR5 in Primary Sclerosing Cholangitis. PLOS ONE. ISSN 1932-6203. 5(8). doi: 10.1371/journal.pone.0012403.
• Brackmann, Stephan; Aamodt, Geir; Andersen, Solveig Norheim; Roald, Borghild; Langmark, Frøydis & Clausen, Ole Petter Fraas [Show all 10 contributors for this article] (2010). Widespread But Not Localized Neoplasia in Inflammatory Bowel Disease Worsens the Prognosis of Colorectal Cancer. Inflammatory Bowel Diseases. ISSN 1078-0998. 16(3), p. 474–481. doi: 10.1002/ibd.21053.
• Perminow, Gøri; Beisner, Julia; Koslowski, Maureen; Lyckander, Lars Gustav; Stange, Eduard & Vatn, Morten H [Show all 7 contributors for this article] (2010). Defective Paneth Cell-Mediated Host Defense in Pediatric Ileal Crohn's Disease. American Journal of Gastroenterology. ISSN 0002-9270. 105(2), p. 452–459. doi: 10.1038/ajg.2009.643.
• Bengtson, May-Bente; Solberg, Inger Camilla; Aamodt, Geir; Jahnsen, Jørgen; Moum, Bjørn & Vatn, Morten H (2010). Relationships between inflammatory bowel disease and perinatal factors: Both maternal and paternal disease are related to preterm birth of offspring. Inflammatory Bowel Diseases. ISSN 1078-0998. 16(5), p. 847–855. doi: 10.1002/ibd.21120.
• Berg, Marianne; Ågesen, Trude Holmeide; Thiis-Evensen, Espen; Merok, Marianne Aarstad; Teixeira, Manuel & Vatn, Morten H [Show all 9 contributors for this article] (2010). Distinct high resolution genome profiles of early onset and late onset colorectal cancer integrated with gene expression data identify candidate susceptibility loci. Molecular Cancer. ISSN 1476-4598. 9. doi: 10.1186/1476-4598-9-100.
• Bengtson, May-Bente; Aamodt, Geir; Vatn, Morten H & Harris, Jennifer (2010). Concordance for IBD among twins compared to ordinary siblings - A Norwegian population-based study. Journal - Crohn's and Colitis Foundation of Canada. ISSN 1197-4982. 4(3), p. 312–318. doi: 10.1016/j.crohns.2009.12.008.
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• Brackmann, Stephan; Andersen, Solveig Norheim; Aamodt, Geir; Roald, Borghild; Langmark, Frøydis & Clausen, Ole Petter Fraas [Show all 10 contributors for this article] (2009). Two distinct groups of colorectal cancer in inflammatory bowel disease. Inflammatory Bowel Diseases. ISSN 1078-0998. 15(1), p. 9–16. doi: 10.1002/ibd.20542.
• Solberg, Camilla; Lygren, Idar; Jahnsen, Jørgen; Aadland, Erling; Høie, Ole & Cvancarova, Milada [Show all 11 contributors for this article] (2009). Clinical course during the first 10 years of ulcerative colitis: results from a population-based inception cohort (IBSEN Study). Scandinavian Journal of Gastroenterology. ISSN 0036-5521. 44(4), p. 431–440. doi: 10.1080/00365520802600961.
• Almendingen, Kari; Fausa, Olav; Høstmark, Arne Torbjørn; Bratlie, Jorun; Mørkrid, Lars & Aabakken, Lars [Show all 7 contributors for this article] (2009). Serum nutrients and habitual dietary intake in colectomized FAP patients in Norway. European Journal of Nutrition. ISSN 1436-6207. 48(3), p. 129–136. doi: 10.1007/s00394-008-0772-1.
• Finanger, Gøri Margrete; Perminow, Gøri; Brackmann, Stephan; Lyckander, Lars G; Franke, Andre & Borthne, Arne [Show all 10 contributors for this article] (2009). A characterization in childhood inflammatory bowel disease, a new population-based inception cohort from South-Eastern Norway, 2005-07, showing increased incidence in Crohn's disease. Scandinavian Journal of Gastroenterology. ISSN 0036-5521. 44(4), p. 446–456. doi: 10.1080/00365520802647434.
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• Moen, Aina Elisabeth Fossum; Lindstrøm, Jonas Christoffer; Tannæs, Tone Møller; Vatn, Simen Svendsen; Vatn, Morten H & Jahnsen, Jørgen [Show all 8 contributors for this article] (2018). Microbial expression in biopsies from ulcerative colitis at the time of diagnosis: bacterial activity is unrelated to abundancy.
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• Moen, Aina Elisabeth Fossum; Tannæs, Tone Møller; Kennedy, Nicholas A; Rudi, Knut; Vatn, Morten H & Jahnsen, Jørgen (2015). Comparison of 16S rDNA and rRNA datasets for characterization of the mucosal microbiota in patients with ulcerative colitis.
• Negard, Anne; Redalen, Kathrine Røe; Jahnsen, Jørgen; Færden, Arne Engebret; Ree, Anne Hansen & Vatn, Morten H (2014). Crohns disease and secondary malignancy: Morphological findings with MRI and CT and how novel functional MR sequences can improve diagnostics.
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