Cdx-2 homeodomain protein expression in human and rat colorectal adenoma and carcinoma

H. C. Ee, T. Erler, P. S. Bhathal, G. P. Young, R. J. James

Research output: Contribution to journalArticlepeer-review

148 Citations (Scopus)


Cancers share many similarities in growth patterns, cellular morphology, and oncofetal antigen expression with embryonic tissue. To better understand the mechanisms underlying malignant transformation and its relationship to developmental processes, we studied the expression of Cdx-2, and intestinal epithelium-specific homeodomain protein, in colorectal adenoma and carcinoma. By immunochemistry with a polyclonal Cdx-2 antibody we have shown that Cdx-2 expression is markedly reduced in the later stages of human colorectal carcinogenesis, namely, high grade dysplasia and invasive carcinoma. The same findings occur in 1,2-dimethylhydrazine-induced rat colorectal tumors, confirming the parallels between the rat model and the human disease. As homeodomain proteins play major roles in directing the regionalization of body parts and in organogenesis and cellular phenotypic specification, a reduction of Cdx-2 expression in the late stages of colorectal carcinogenesis may reflect a concomitant deviation of the neoplastic tissue from the normal intestinal epithelial phenotype.

Original languageEnglish
Pages (from-to)586-592
Number of pages7
JournalAmerican Journal of Pathology
Issue number3
Publication statusPublished - Sept 1995
Externally publishedYes


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