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Nitrite from inflammatory cells—A cancer risk factor in ulcerative colitis?

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Diseases of the Colon & Rectum

Abstract

Elevated levels of luminal nitrite and a lowered luminal pH were found in 77 percent of patients with acute ulcerative colitis. No luminal nitrite was found in healthy control subjects. Nitrites are a secretory product of activated macrophages and neutrophils of the lamina propria, whereas the lowered luminal pH is due to diminished bicarbonate formation by impaired colonocytes. A hypothesis is put forward that nitrites, lowered pH, and bacterial amines are conducive to formation of carcinogenic n-nitroso compounds, which reflect a cancer risk in patients with ulcerative colitis dependent on the type and extent of inflammatory cell activation as well as metabolic impairment of colonic epithelial cells.

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Supported by project grants from the N.H. & M.R.C. of Australia and Research Foundation of The Queen Elizabeth Hospital to W. E. W. Roediger.

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Roediger, W.E.W., Lawson, M.J. & Radcliffe, B.C. Nitrite from inflammatory cells—A cancer risk factor in ulcerative colitis?. Dis Colon Rectum 33, 1034–1036 (1990). https://doi.org/10.1007/BF02139219

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  • DOI: https://doi.org/10.1007/BF02139219

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