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Definition
Homeobox protein CDX2 is a protein encoded by the CDX2 gene, which is a member of the caudal-related homeobox transcription factor family.
Features
CDX2 is a homeobox domain-containing transcription factor, which plays a pivotal role in the development and differentiation of intestinal epithelial cells and maintenance of intestinal phenotype, through transcriptional regulation of multiple genes expressed in the intestinal epithelium. This complex machinery of sequentially activated genes seems to decrease cellular replication and induce differentiation to mature intestinal epithelium. CDX2 is expressed in the nucleus of intestinal epithelial cells and, in addition, in the nucleus of pancreatic centroacinar, intercalated, and intralobular duct cells (Moskaluk et al. 2003). Among digestive neuroendocrine cells, CDX2 is expressed by intestinal serotonin-producing EC-cells and by about 10% of gastrin-producing G-cells (La Rosa et al. 2004)....
References and Further Reading
Bellizzi, A. M. (2013). Assigning site of origin in metastatic neuroendocrine neoplasms: A clinically significant application of diagnostic immunohistochemistry. Advances in Anatomic Pathology, 20, 285–314.
La Rosa, S., Rigoli, E., Uccella, S., Chiaravalli, A. M., & Capella, C. (2004). CDX2 as a marker of intestinal EC-cells and related well-differentiated endocrine tumors. Virchows Archiv, 445, 248–254.
Moskaluk, C. A., Zhang, H., Powell, S. M., Cerilli, L. A., Hampton, G. M., & Frierson, H. F., Jr. (2003). Cdx2 protein expression in normal and malignant human tissues: An immunohistochemical survey using tissue microarrays. Modern Pathology, 16, 913–919.
Uccella, S., Sessa, F., & La Rosa, S. (2015). Diagnostic approach to neuroendocrine neoplasms of the gastrointestinal tract and pancreas. Turk Patoloji Derg, 31(Suppl 1), 113–127.
Uccella, S., La Rosa, S., Volante, M., & Papotti, M. (2018). Immunohistochemical biomarkers of gastrointestinal, pancreatic, pulmonary, and thymic neuroendocrine neoplasms. Endocrine Pathology, 29, 150–168.
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La Rosa, S. (2021). CDX2. In: van Krieken, J. (eds) Encyclopedia of Pathology. Encyclopedia of Pathology. Springer, Cham. https://doi.org/10.1007/978-3-319-28845-1_5183-1
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DOI: https://doi.org/10.1007/978-3-319-28845-1_5183-1
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Publisher Name: Springer, Cham
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