Abstract
Cancer hazards from pesticide residues in food have been much discussed in the past decade. In this study, we showed that dichlorvos and dimethoate affect hemoglobin content and hematocrit value, but had no effect on red blood cell counts and total plasma protein in mice. A 40-mg/kg/day dose of dichlorvos upregulated the expression of p16, Bcl-2 and c-myc genes in mouse gastric tissue. By contrast, expression of the p16, Bcl-2 and c-myc genes induced by low doses (5, 10 and 20 mg/kg/day) of dichlorvos demonstrated no change in the control check group (CK; 200 μl sterile saline perfused group; 0 mg/kg/day). Different doses of dimethoate all upregulated the expression of p16, Bcl-2 and c-myc genes in mouse gastric tissue. The results further demonstrated that mouse gastric tissue, exposed in the long-term to low doses of dichlorvos and dimethoate, has the potential to become cancerous.
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