Ole Haagen Nielsen

Ole Haagen Nielsen

Clinical Professor

Member of:

  • Internal Medicine: Gastroenterology and Hepatology

ORCID: 0000-0003-4612-8635

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  1. Published

    Impact of feedback and monitoring on colonoscopy withdrawal times and polyp detection rates

    Nielsen, A. B., Nielsen, Ole Haagen & Hendel, J., 2017, In: BMJ Open Gastroenterology. 4, 6 p., e000142.

    Research output: Contribution to journal › Journal article › Research › peer-review

  2. Published

    Inhibition of 5-lipoxygenase pathway of arachidonic acid metabolism in human neutrophils by sulfasalazine and 5-aminosalicylic acid

    Nielsen, Ole Haagen, Bukhave, K., Elmgreen, J. & Ahnfelt-Rønne, I., Jun 1987, In: Digestive Diseases and Sciences. 32, 6, p. 577-82 6 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  3. Published

    4-Aminosalicylic acid, in contrast to 5-aminosalicylic acid, has no effect on arachidonic acid metabolism in human neutrophils, or on the free radical 1,1-diphenyl-2-picrylhydrazyl

    Nielsen, Ole Haagen & Ahnfelt-Rønne, I., Apr 1988, In: Pharmacology & Toxicology. 62, 4, p. 223-6 4 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  4. Published

    Source of endogenous arachidonate and 5-lipoxygenase products in human neutrophils stimulated by bradykinin and A23187

    Nielsen, Ole Haagen, Bukhave, K., Ahnfelt-Rønne, I. & Rask-Madsen, J., Mar 1988, In: Gut. 29, 3, p. 319-24 6 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  5. Published

    Svedelektrolytundersøgelse med pilokarpin-iontoforesemetoden

    Nielsen, Ole Haagen & Flensborg, E. W., 31 Aug 1981, In: Ugeskrift for Laeger. 143, 36, p. 2302-6 5 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  6. Calcium absorption and acceptance of low-lactose milk among children with primary lactase deficiency

    Nielsen, Ole Haagen, Schiøtz, P. O., Rasmussen, S. N. & Krasilnikoff, P. A., 1984, In: Journal of Pediatric Gastroenterology and Nutrition. 3, 2, p. 219-23 5 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  7. Published

    Use of biological molecules in the treatment of inflammatory bowel disease

    Nielsen, Ole Haagen, Seidelin, Jakob Benedict, Munck, Lars Kristian & Rogler, G., Jul 2011, In: Journal of Internal Medicine. 270, 1, p. 15-28 14 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  8. Published

    Gastric emptying rate and small bowel transit time in patients with irritable bowel syndrome determined with 99mTc-labeled pellets and scintigraphy

    Nielsen, Ole Haagen, Gjørup, T. & Christensen, F. N., Dec 1986, In: Digestive Diseases and Sciences. 31, 12, p. 1287-91 5 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  9. Published

    Established and emerging biological activity markers of inflammatory bowel disease

    Nielsen, Ole Haagen, Vainer, B., Madsen, S. M., Seidelin, Jakob Benedict & Heegaard, N. H., Feb 2000, In: The American Journal of Gastroenterology. 95, 2, p. 359-67 9 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  10. Published

    In vitro Superoxide Production by Peripheral Neutrophils from Patients with Inflammatory Bowel Disease

    Nielsen, Ole Haagen, Berild, D. & Ahnfelt-Rønne, I., 1994, In: Mediators of Inflammation. 3, 2, p. 161-4 4 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  11. Published

    Inflammatory bowel disease: potential therapeutic strategies

    Nielsen, Ole Haagen, Vainer, B., Bregenholt, S., Claesson, Mogens Helweg, Bishop, P. D. & Kirman, I., 1997, In: Cytokines Cellular and Molecular Therapy. 3, 4, p. 267-281 15 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  12. Published

    Involvement of oxygen-derived free radicals in the pathogenesis of chronic inflammatory bowel disease

    Nielsen, Ole Haagen & Ahnfelt-Rønne, I., 15 Dec 1991, In: Wiener Klinische Wochenschrift. 69, 21-23, p. 995-1000 6 p.

    Research output: Contribution to journal › Review › Research › peer-review

  13. The incidence of anemia, hypoproteinemia, and edema in infants as presenting symptoms of cystic fibrosis: a retrospective survey of the frequency of this symptom complex in 130 patients with cystic fibrosis

    Nielsen, Ole Haagen & Larsen, B. F., 1982, In: Journal of Pediatric Gastroenterology and Nutrition. 1, 3, p. 355-9 5 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  14. Published

    Pregnancy in ulcerative colitis

    Nielsen, Ole Haagen, Andreasson, B., Bondesen, S. & Jarnum, S., Sep 1983, In: Scandinavian Journal of Gastroenterology. 18, 6, p. 735-42 8 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  15. Published

    Inflammation og frie oxygenradikaler

    Nielsen, Ole Haagen & Ahnfelt-Rønne, I., 1989, In: Nordisk Medicin. 104, 8-9, p. 216-8 3 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  16. Published

    Release of leukotriene B4 and 5-hydroxyeicosatetraenoic acid during phagocytosis of artificial immune complexes by peripheral neutrophils in chronic inflammatory bowel disease

    Nielsen, Ole Haagen, Elmgreen, J., Thomsen, B. S., Ahnfelt-Rønne, I. & Wiik, A., Aug 1986, In: Clinical and Experimental Immunology. 65, 2, p. 465-71 7 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  17. Sulfasalazine intolerance. A retrospective survey of the reasons for discontinuing treatment with sulfasalazine in patients with chronic inflammatory bowel disease

    Nielsen, Ole Haagen, Apr 1982, In: Scandinavian Journal of Gastroenterology. 17, 3, p. 389-93 5 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  18. Published

    Effect of 5-aminosalicylic acid and analogous substances on superoxide generation and intracellular free calcium in human neutrophilic granulocytes

    Nielsen, Ole Haagen, Bouchelouche, P. N., Berild, D. & Ahnfelt-Rønne, I., Jun 1993, In: Scandinavian Journal of Gastroenterology. 28, 6, p. 527-32 6 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  19. Published

    Effects of antirheumatic drugs on endogenous arachidonate metabolism and chemotaxis in human neutrophil granulocytes

    Nielsen, Ole Haagen, Ahnfelt-Rønne, I. & Elmgreen, J., Jan 1989, In: Agents and Actions. 26, 1-2, p. 233-4 2 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  20. Non-tropical sprue. Malignant diseases and mortality rate

    Nielsen, Ole Haagen, Jacobsen, O., Pedersen, E. R., Rasmussen, S. N., Petri, M., Laulund, S. & Jarnum, S., 1985, In: Scandinavian Journal of Gastroenterology. 20, 1, p. 13-18 6 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  21. Published

    A comparison of the effect of timegadine, levamisole, and D-penicillamine on human neutrophil metabolism of endogenous arachidonic acid and chemotaxis

    Nielsen, Ole Haagen, Ahnfelt-Rønne, I. & Elmgreen, J., May 1988, In: Pharmacology & Toxicology. 62, 5, p. 322-5 4 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  22. Published

    De frie oxygenradikalers betydning for patogenesen ved kronisk inflammatorisk tarmsygdom

    Nielsen, Ole Haagen & Ahnfelt-Rønne, I., 14 Sep 1992, In: Ugeskrift for Laeger. 154, 38, p. 2544-6 3 p.

    Research output: Contribution to journal › Review › Research › peer-review

  23. Published

    Effect of the leukotriene LTD4/LTE4 antagonist, SR 2640, in ulcerative colitis: an open clinical study

    Nielsen, Ole Haagen, Ahnfelt-Rønne, I., Thomsen, Michael Kirkedal, Kissmeyer, A. M. & Langholz, Ebbe, Mar 1991, In: Prostaglandins, Leukotrienes & Essential Fatty Acids. 42, 3, p. 181-4 4 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  24. Published

    Circulating soluble interleukin-2 receptor alpha and beta chain in inflammatory bowel disease

    Nielsen, Ole Haagen, Ciardelli, T., Wu, Z., Langholz, Ebbe & Kirman, I., Aug 1995, In: The American Journal of Gastroenterology. 90, 8, p. 1301-6 6 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  25. Published

    Soluble interleukin-2 receptors in ulcerative colitis

    Nielsen, Ole Haagen & Brynskov, J., 1993, In: Mediators of Inflammation. 2, 2, p. 115-8 4 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  26. Published

    Involvement of interleukin-4 and -10 in inflammatory bowel disease

    Nielsen, Ole Haagen, Køppen, T., Rüdiger, N., Horn, T., Eriksen, J. & Kirman, I., Sep 1996, In: Digestive Diseases and Sciences. 41, 9, p. 1786-93 8 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  27. Published

    Pregnancy in Crohn's disease

    Nielsen, Ole Haagen, Andreasson, B., Bondesen, S., Jacobsen, O. & Jarnum, S., Sep 1984, In: Scandinavian Journal of Gastroenterology. 19, 6, p. 724-32 9 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  28. Published

    Gastric emptying and subjective symptoms of nausea: lack of effects of a 5-hydroxytryptamine-3 antagonist ondansetron on gastric emptying in patients with gastric stasis syndrome

    Nielsen, Ole Haagen, Hvid-Jacobsen, K., Lund, P. & Langholz, Ebbe, 1990, In: Digestion. 46, 2, p. 89-96 8 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  29. Published

    Circulating and mucosal concentrations of tumour necrosis factor and inhibitor(s) in chronic inflammatory bowel disease

    Nielsen, Ole Haagen, Brynskov, J. & Bendtzen, K., Apr 1993, In: Danish Medical Bulletin (Print). 40, 2, p. 247-9 3 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  30. Published

    Arachidonic acid metabolism in human neutrophils: lack of effect of cyclosporine A

    Nielsen, Ole Haagen, Bukhave, K., Ahnfelt-Rønne, I. & Elmgreen, J., 1986, In: International Journal of Immunopharmacology. 8, 4, p. 419-26 8 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  31. Published

    Inhibition of intestinal macrophage chemotaxis to leukotriene B4 by sulphasalazine, olsalazine, and 5-aminosalicylic acid

    Nielsen, Ole Haagen, Verspaget, H. W. & Elmgreen, J., Jun 1988, In: Alimentary Pharmacology and Therapeutics. 2, 3, p. 203-11 9 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  32. Published

    Microbiological evaluation of jejunal aspirates and faecal samples after oral administration of bifidobacteria and lactic acid bacteria

    Nielsen, Ole Haagen, Jørgensen, S., Pedersen, K. & Justesen, Torkild, May 1994, In: Journal of Applied Bacteriology. 76, 5, p. 469-74 6 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  33. Pediatric tube system for collection of uncontaminated jejunal juice

    Nielsen, Ole Haagen, Hjelt, K., Krasilnikoff, P. A., Justesen, T. & Rasmussen, S. N., 1983, In: Journal of Pediatric Gastroenterology and Nutrition. 2, 3, p. 483-6 4 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  34. Published

    Serum interferon activity in inflammatory bowel disease. Arachidonic acid release and lipoxygenation activated by alpha-class interferon in human neutrophils

    Nielsen, Ole Haagen, Elmgreen, J. & Ahnfelt-Rønne, I., Apr 1988, In: Inflammation. 12, 2, p. 169-79 11 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  35. Published

    Adrenogenital syndrome and cystic fibrosis

    Nielsen, Ole Haagen & Haahr, J., Mar 1982, In: Acta Paediatrica Scandinavica. 71, 2, p. 339-41 3 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  36. Published

    Cystic fibrosis in Denmark 1945 to 1985. An analysis of incidence, mortality and influence of centralized treatment on survival

    Nielsen, Ole Haagen, Thomsen, Birthe Lykke Riegels, Green, A., Andersen, Per Kragh, Hauge, M. & Schiøtz, P. O., Nov 1988, In: Acta Paediatrica Scandinavica. 77, 6, p. 836-41 6 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  37. Published

    Abnormal metabolism of arachidonic acid in chronic inflammatory bowel disease: enhanced release of leucotriene B4 from activated neutrophils

    Nielsen, Ole Haagen, Ahnfelt-Rønne, I. & Elmgreen, J., Feb 1987, In: Gut. 28, 2, p. 181-5 5 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  38. Published

    Arachidonic acid and calcium metabolism in rnelittin stimulated neutrophils

    Nielsen, Ole Haagen, Bouchelouche, P. N. & Berild, D., 1992, In: Mediators of Inflammation. 1, 5, p. 313-7 5 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  39. Published

    In vitro studies on the significance of arachidonate metabolism and other oxidative processes in the inflammatory response of human neutrophils and macrophages. With special reference to chronic inflammatory bowel disease

    Nielsen, Ole Haagen, 1988, In: Scandinavian Journal of Gastroenterology. 150, p. 1-21 21 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  40. Published

    Circulating soluble intercellular adhesion molecule-1 (sICAM-1) in active inflammatory bowel disease

    Nielsen, Ole Haagen, Langholz, Ebbe, Hendel, J. & Brynskov, J., Sep 1994, In: Digestive Diseases and Sciences. 39, 9, p. 1918-23 6 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  41. Published

    Activation of neutrophil chemotaxis by leukotriene B4 and 5-hydroxyeicosatetraenoic acid in chronic inflammatory bowel disease

    Nielsen, Ole Haagen & Elmgreen, J., Oct 1987, In: Scandinavian Journal of Clinical and Laboratory Investigation. 47, 6, p. 605-11 7 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  42. Published

    Increased mucosal concentrations of soluble intercellular adhesion molecule-1 (sICAM-1), sE-selectin, and interleukin-8 in active ulcerative colitis

    Nielsen, Ole Haagen, Brynskov, J. & Vainer, B., 1 Jan 1996, In: Digestive Diseases and Sciences. 41, 9, p. 1780-1785 6 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  43. Published

    Review article: The treatment of inflammatory bowel disease with 6-mercaptopurine or azathioprine

    Nielsen, Ole Haagen, Vainer, B. & Rask-Madsen, J., 7 Nov 2001, In: Alimentary Pharmacology and Therapeutics. 15, 11, p. 1699-1708 10 p.

    Research output: Contribution to journal › Review › Research › peer-review

  44. Published

    Mediators of inflammation in chronic inflammatory bowel disease

    Nielsen, Ole Haagen & Rask-Madsen, J., 22 Apr 1996, In: Scandinavian Journal of Gastroenterology, Supplement. 31, 216, p. 149-159 11 p.

    Research output: Contribution to journal › Review › Research › peer-review

  45. Published

    Intestinal interleukin-8 concentration and gene expression in inflammatory bowel disease

    Nielsen, Ole Haagen, Rüdiger, N., Gaustadnes, M. & Horn, T., 1 Jan 1997, In: Scandinavian Journal of Gastroenterology. 32, 10, p. 1028-1034 7 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  46. Published

    Abdominal pain caused by Enterobius vermicularis: A case report

    Nielsen, Ole Haagen & Krasilnikoff, P. A., 1 Jan 1985, In: Current Therapeutic Research - Clinical and Experimental. 37, 4, p. 779-783 5 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  47. Published

    Systematic review: Coxibs, non-steroidal anti-inflammatory drugs or no cyclooxygenase inhibitors in gastroenterological high-risk patients?

    Nielsen, Ole Haagen, Ainsworth, M., vlz241, vlz241 & Rask-Madsen, J., 1 Jan 2006, In: Alimentary Pharmacology and Therapeutics. 23, 1, p. 27-33 7 p.

    Research output: Contribution to journal › Review › Research › peer-review

  48. Published

    Reference values of sweat sodium obtained by pilocarpine iontophoresis

    Nielsen, Ole Haagen & Flensborg, E. W., 1 Jan 1987, In: Current Therapeutic Research - Clinical and Experimental. 41, 3, p. 367-373 7 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  49. Published

    Inflammation and free oxygen radicals

    Nielsen, Ole Haagen & Ahnfelt-Ronne, I., 1 Jan 1989, In: Ugeskrift for Laeger. 151, 16, p. 976-978 3 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  50. Published

    Udvalgene Vedrørende Videnskabelig Uredelighed bør styrkes

    Nielsen, Ole Haagen & Axelsen, N., 14 Oct 2013, In: Ugeskrift for Laeger. 175, 42, p. 2473

    Research output: Contribution to journal › Journal article › Research

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ID: 4947702