Dextran sulfate enhances the level of an oxidative DNA damage biomarker, 8-oxo-7,8-dihydro-2'-deoxyguanosine, in rat colonic mucosa

Cancer Lett. 1998 Dec 11;134(1):1-5. doi: 10.1016/s0304-3835(98)00228-6.


Dextran sodium sulfate (DSS) given in drinking water can induce colonic inflammation and produce colorectal tumors in rodents, although it is not directly genotoxic. The hypothesis that DSS can produce free radicals and induce oxidative DNA damage in colonic mucosa has been tested. In rats fed for 2 days with water containing 3% and 6% DSS, colonic inflammation manifestations were recorded and 8-oxo-7,8-dihydro-2'-deoxyguanosine (8-oxodGuo), a major biomarker of oxidative DNA damage, was assayed in colonic mucosa. As compared with control rats given pure water, inflammatory manifestations were seen in rats given DSS. At the same time, 8-oxodGuo levels in colonic mucosa were doubled (P < 0.001). These results suggest that formation of oxidative DNA damage in colonic mucosa depends on inflammation and maybe on the production of reactive oxygen species. This study shows that DSS can induce oxidative DNA damage within only 2 days, which could explain in part its carcinogenic properties.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Biomarkers
  • Colon / drug effects*
  • Colon / metabolism
  • Colon / pathology
  • Colonic Diseases / chemically induced
  • Colonic Diseases / metabolism
  • Colonic Diseases / pathology
  • DNA Damage*
  • Deoxyguanine Nucleotides / metabolism*
  • Dextran Sulfate / adverse effects*
  • Dose-Response Relationship, Drug
  • Female
  • Inflammation / chemically induced
  • Inflammation / metabolism
  • Inflammation / pathology
  • Intestinal Mucosa / drug effects*
  • Intestinal Mucosa / metabolism
  • Intestinal Mucosa / pathology
  • Occult Blood
  • Oxidative Stress / drug effects
  • Rats
  • Rats, Inbred F344


  • Biomarkers
  • Deoxyguanine Nucleotides
  • 8-oxodeoxyguanosine triphosphate
  • Dextran Sulfate