Abstract
Oral cancer overexpressed 1 (ORAOV1) has been reported to exhibit high amplification levels in esophageal squamous cell cancer (ESCC) and in premalignant lesions. However, ORAOV1 protein expression levels in ESCC and esophageal squamous intraepithelial neoplasia (ESIN) have not yet been reported. We have explored the relationship of ORAOV1 protein expression with ESCC and ESIN by immunohistochemically analyzing tissue microarrays containing esophageal samples from patients with various clinical features and prognoses. The percentage of ESCC, high-grade ESIN (HGESIN), low-grade ESIN (LGESIN), and nontumoral control patients overexpressing ORAOV1 were 70.63% (101/143), 77.36% (41/53), 48.96% (47/96), and 5.79% (7/121), respectively. ORAOV1 overexpression also appears to be significantly higher in ESCC, HGESIN, and LGESIN than in the controls (all P < .001), and the levels observed for ESCC and HGESIN were also significantly higher than that in LGESIN (both P = .001). These results corresponded to high sensitivity and specificity values in ESCC, HGESIN, and LGESIN tissues. Furthermore, the increased expression of ORAOV1 is significantly associated with lymph node metastasis (P = .001) and an advanced TNM stage (III + IV) (P = .014...Continue Reading
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