Ballian N, Liu SH, Brunicardi FC.

World J Gastroenterol. 2008 Oct 14;14(38):5823-6.

The Michael E. DeBakey Department of Surgery, Baylor College of Medicine, Houston, TX 77030, USA.



To examine the expression of pancreatic duodenal homeobox-1 (PDX-1) transcription factor in human colorectal cancer.


RT-PCR, Western blotting, and immuno-histochemistry were performed to determine the expression pattern of transcription factor PDX-1 in primary colorectal tumor, hepatic metastasis, and benign colon tissue from a single patient.


The highest PDX-1 transcription levels were detected in the metastasis material. Lower levels of PDX-1 were found to be present in the primary tumor, while normal colon tissue failed to express detectable levels of PDX-1. Western blot data revealed a PDX-1 expression pattern identical to that of mRNA expression. Immunohistochemistry confirmed high metastasis PDX-1 expression, lower levels in the primary tumor, and the presence of only traces of PDX-1 in normal colon tissue.


These data argue for further evaluation of PDX-1 as a biomarker for colorectal cancer.

PMID: 18855980 [PubMed – indexed for MEDLINE] PMCID: PMC2751891