Immunohistochemical molecular phenotypes of gastric cancer based on SOX2 and CDX2 predict patient outcome View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2014-12

AUTHORS

Vânia Camilo, Rita Barros, Ricardo Celestino, Patrícia Castro, Joana Vieira, Manuel R Teixeira, Fátima Carneiro, João Pinto-de-Sousa, Leonor David, Raquel Almeida

ABSTRACT

BACKGROUND: Gastric cancer remains a serious health concern worldwide. Patients would greatly benefit from the discovery of new biomarkers that predict outcome more accurately and allow better treatment and follow-up decisions. Here, we used a retrospective, observational study to assess the expression and prognostic value of the transcription factors SOX2 and CDX2 in gastric cancer. METHODS: SOX2, CDX2, MUC5AC and MUC2 expression were assessed in 201 gastric tumors by immunohistochemistry. SOX2 and CDX2 expression were crossed with clinicopathological and follow-up data to determine their impact on tumor behavior and outcome. Moreover, SOX2 locus copy number status was assessed by FISH (N = 21) and Copy Number Variation Assay (N = 62). RESULTS: SOX2 was expressed in 52% of the gastric tumors and was significantly associated with male gender, T stage and N stage. Moreover, SOX2 expression predicted poorer patient survival, and the combination with CDX2 defined two molecular phenotypes, SOX2+CDX2- versus SOX2-CDX2+, that predict the worst and the best long-term patients' outcome. These profiles combined with clinicopathological parameters stratify the prognosis of patients with intestinal and expanding tumors and in those without signs of venous invasion. Finally, SOX2 locus copy number gains were found in 93% of the samples reaching the amplification threshold in 14% and significantly associating with protein expression. CONCLUSIONS: We showed, for the first time, that SOX2 combined with CDX2 expression profile in gastric cancer segregate patients into different prognostic groups, complementing the clinicopathological information. We further demonstrate a molecular mechanism for SOX2 expression in a subset of gastric cancer cases. More... »

PAGES

753

Identifiers

URI

http://scigraph.springernature.com/pub.10.1186/1471-2407-14-753

DOI

http://dx.doi.org/10.1186/1471-2407-14-753

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1042848450

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/25300947


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