Journal
CANCER LETTERS
Volume 202, Issue 2, Pages 125-129Publisher
ELSEVIER IRELAND LTD
DOI: 10.1016/j.canlet.2003.08.005
Keywords
thiamin deflciency; colon cancer; aberrant crypt foci; transketolase; alpha-oxoaldehydes
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Thiamin deficiency leads to the endogenous formation of genotoxic alpha-oxoaldehydes (glyoxals). To evaluate whether marginal deficiency poses a carcinogenesis risk we fed rats AIN-76A sucrose-based diets containing thiamin at 4.9 (control), 1.6 or 1.0 mg/kg diet and examined their colons after 160 days. Reduced thiamin increased aberrant crypt foci (ACF) from 1.14 +/- 0.46 to 3.70 +/- 1.17 and 2.60 +/- 1.02 ACF/colon in the absence of exogenous carcinogen or of symptoms of beriberi. Since typical Western diets can provide marginal levels of thiamin with high levels of simple sugars, individuals could be exposed to an increased risk of colon and perhaps other cancers. (C) 2003 Elsevier Ireland Ltd. All rights reserved.
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