CDX2 regulates liver intestine-cadherin expression in normal and malignant colon epithelium and intestinal metaplasia

Takao Hinoi ¹, Peter C Lucas , Rork Kuick

⁰Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, Michigan, USA.

Gastroenterology +

|

October 31, 2002

View abstract on PubMed

Summary

The caudal-related homeobox transcription factor CDX2 regulates liver intestine-cadherin (LI-cadherin) gene expression. This finding is crucial for understanding intestinal cell development and diseases like colorectal cancer.

Area Of Science

Gastroenterology
Molecular Biology
Cancer Research

Background

CDX2 is an intestine-specific transcription factor vital for intestinal development and differentiation.
Altered CDX2 expression is linked to colon polyps, poorly differentiated colon carcinomas, and metaplasias in the stomach and esophagus.

Purpose Of The Study

To identify genes regulated by CDX2 to better understand its function.
To investigate the relationship between CDX2 and LI-cadherin expression in gastrointestinal tissues.

Main Methods

Engineered HT-29 colon cancer cells to express CDX2 and analyzed gene expression changes using oligonucleotide arrays.
Performed chromatin immunoprecipitation assays and analyzed the 5'-flanking region of the LI-cadherin gene.

Main Results

CDX2 strongly induced the expression of liver intestine (LI)-cadherin (cadherin 17) in HT-29 cells.
A strong correlation was observed between CDX2 and LI-cadherin expression in colorectal cancer cell lines, primary colorectal cancers, and intestinal metaplasias.
CDX2 directly binds to elements in the 5'-flanking region of the LI-cadherin gene.

Conclusions

CDX2 regulates LI-cadherin gene expression across normal, metaplastic, and neoplastic gastrointestinal tissues.
LI-cadherin may be a key mediator of CDX2's role in intestinal cell fate determination, impacting morphogenesis and differentiation.

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