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ABSTRACT: Background
Caudal-related homeobox transcription factor 2 (CDX2) is an intestine-specific transcription factor implicated in tumour differentiation, proliferation, cell adhesion and migration. Negative CDX2 status (CDX2-) is associated with worse prognosis in colorectal cancer and may identify high-risk stage II disease that benefits from adjuvant chemotherapy. This observational study investigated whether CDX2- is associated with prognosis or response to chemotherapy in the mismatch repair-deficient (dMMR) phenotype of colorectal cancer.Methods
Patients with resectable dMMR colorectal cancer were eligible for inclusion. The prognostic and predictive value of CDX2 expression on the presence of lymph node metastasis (LNM) and survival was investigated. CDX2 status was determined via immunohistochemistry using the Leica Bond™ CDX2 (clone EP25) ready-to-use primary antibody.Results
Some 235 of 238 consecutive dMMR tumours were assessed for CDX2 status. CDX2- was observed in 15·7 per cent of colorectal cancer. Interobserver agreement was excellent (??=?0·863; P?P???0·038). CDX2- was not associated with LNM or survival in multivariable analysis. Independent predictors of LNM were PDC grade (odds ratio (OR) 4·12, 95 per cent c.i. 1·76 to 9·63; P?=?0·001) and extramural venous invasion (OR 3·79, 1·62 to 8·85; P?=?0·002). Budding (hazard ratio (HR) 2·79, 95 per cent c.i. 1·60 to 4·87; P?P?=?0·015) and adjuvant chemotherapy (HR 2·07, 1·15 to 3·74; P?=?0·016) were independently associated with worse disease-free survival.Conclusion
CDX2- does not confer a worse prognosis in the dMMR phenotype of colorectal cancer. The MMR status of patients with colorectal cancer should be determined before assessing CDX2 status.
SUBMITTER: Ryan EJ
PROVIDER: S-EPMC6253792 | biostudies-literature | 2018 Dec
REPOSITORIES: biostudies-literature
BJS open 20180724 6
<h4>Background</h4>Caudal-related homeobox transcription factor 2 (CDX2) is an intestine-specific transcription factor implicated in tumour differentiation, proliferation, cell adhesion and migration. Negative CDX2 status (CDX2-) is associated with worse prognosis in colorectal cancer and may identify high-risk stage II disease that benefits from adjuvant chemotherapy. This observational study investigated whether CDX2- is associated with prognosis or response to chemotherapy in the mismatch rep ...[more]