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Howsam M, Grimalt JO, Guino E, Navarro M, Marti-Rague J, Peinado MA, Capella G, Moreno V: Organochlorine exposure and colorectal cancer risk. Environ Health Perspect. 2004 Nov;112(15):1460-6.
Alpha-hexachlorocyclohexane, hexachlorobenzene, and p,p'-DDE (4,4'-dichlorodiphenyltrichloroethene) showed nonsignificant increases in risk. We assessed point mutations in K-ras and p53 genes in tissue samples by polymerase chain reaction/single-strand conformation polymorphism and assessed expression of p53 protein by immunohistochemical methods. |
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