Objective: To investigate the expression of HPA and HIF-1alpha in human esophageal squamous cell carcinoma and their relationship with cancer development, invasion and metastasis.
Methods: The expression of HPA mRNA and HIF-1alpha protein in 23 mucosa specimens of incisal margin, 26 para-tumorous dysplastic tissues and 70 esophageal squamous cell carcinoma specimens were detected by in situ hybridization assay and immunohistochemical staining, respectively.
Results: The positive expression of HPA mRNA and HIF-1alpha protein were significantly increased as the epithelial cells progressed into carcinoma (P < 0.05). The expression of HPA mRNA and HIF-1alpha protein in the esophageal squamous cell carcinoma were significantly correlated with the invasion depth, lymph node metastasis and clinical staging (P < 0.05), while it was not correlated with the differentiation of tumors (P > 0.05). There was a close correlation between the expression of HPA mRNA and HIF-1alpha protein in the carcinoma tissues (P < 0.01).
Conclusion: The high expression of HPA mRNA and HIF-1alpha protein is correlated with carcinogenesis, progression, invasion and metastasis of esophageal squamous cell carcinoma. There may be a positive cooperation between two of them in the carcinogenesis and development of esophageal carcinoma. The determination of HPA mRNA and HIF-1 alpha will be useful in predicting tumor biological behavior.
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