Cancer Research

Azoxymethane

Sigma® is pleased to make this important compound available to cancer researchers

Product No. A2853

Azoxymethane (AOM) is a potent carcinogen used to induce colon cancer in rats and mice. It has been used in studies evaluating efficacy of preventative treatment for azoxymethane-induced carcinogenesis.1,2,3 Azoxymethane is also commonly used to determine the chemopreventative effectiveness of particular foods such as undigestable sugars4,5, red meat6, and green tea7 among others in rodent models. These rodent model results aid in the identification of possible preventative approaches to human colon cancer.8

Changes or abnormalities in transforming growth factor beta (TGF-β) signaling are detected in tumors developed by mice treated with AOM.9,10 Treatment with azoxymethane activates intrinsic tyrosine kinase of EGF receptor while stimulating the synthesis of TGF-alpha.11

The cyclooxygenase 2 (COX-2) inhibitor NS-398 (Product No. N194) reduces the incidence of preneoplastic cells in rats treated with azoxymethane.12

References

  1. Escribano, M., et al., Aspirin inhibits endothelial nitric oxide synthase (eNOS) and Flk-1 (vascular endothelial growth factor receptor-2) prior to rat colon tumour development. Clin. Sci. (Lond)., 106: 83-91 (2004).
  2. Marotta, F., et al., Chemopreventive effect of a probiotic preparation on the development of preneoplastic and neoplastic colonic lesions: an experimental study. Hepatogastroenterology, 50: 1914-8 (2003).
  3. Orii, S., et al., Chemoprevention for colorectal tumorigenesis associated with chronic colitis in mice via apoptosis. J. Exp. Clin. Cancer Res., 22: 41-6 (2003).
  4. Pool-Zobel, B., et al., Experimental evidences on the potential of prebiotic fructans to reduce the risk of colon cancer. Br. J. Nutr., Suppl 2: S273-81 (2002).
  5. Nakanishi, S., et al., Effects of high amylose maize starch and Clostridium butyricum on metabolism in colonic microbiota and formation of azoxymethane-induced aberrant crypt foci in the rat colon. Microbiol Immunol., 47: 951-8 (2003).
  6. Pierre, F., et al., Meat and cancer: haemoglobin and haemin in a low-calcium diet promote colorectal carcinogenesis at the aberrant crypt stage in rats. Carcinogenesis, 24: 1683-90 (2003).
  7. Metz, N., et al., Suppression of azoxymethane-induced preneoplastic lesions and inhibition of cyclooxygenase-2 activity in the colonic mucosa of rats drinking a crude green tea extract. Nutr Cancer., 38: 60-4 (2000).
  8. Corpet, D.E. and Pierre, F., Point: From animal models to prevention of colon cancer. Systematic review of chemoprevention in min mice and choice of the model system. Cancer Epidemiol. Biomarkers Prev., 12: 391-400 (2003).
  9. Guda, K., et al., Defective processing of the transforming growth factor-beta1 in azoxymethane-induced mouse colon tumors. Mol. Carcinog., 37: 51-9 (2003).
  10. Guda, K., et al., Aberrant transforming growth factor-beta signaling in azoxymethane-induced mouse colon tumors. Mol Carcinog., 31: 204-13 (2001).
  11. Relan, N.K., Identification and evaluation of the role of endogenous tyrosine kinases in azoxymethane induction of proliferative processes in the colonic mucosa of rats. Biochim Biophys Acta., 1244(2-3): 368-76 (1995
    Jun 9)
  12. Kishimoto, Y., et al., Effects of cyclooxygenase-2 inhibitor NS-398 on APC and c-myc expression in rat colon carcinogenesis induced by azoxymethane. J. Gastroenterol., 37: 186-93 (2002).

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