CD44 is a cell-surface glycoprotein postulated to play a role in tumor cell metastasis. Aberrant expression of the cell adhesion molecule CD44 has been detected in human tumors and the expression of specific isoforms(splice variants) has been shown to be associated with metastasis and poor prognosis in human malignancies. We used variant exon sequence-specific monoclonal antibody to epitope encoded by exon v6 of human variant CD44 to study the expression of CD44 splice variant by immunochemistry in fifty nine samples of human cervical cancer. twenty seven tissue samples of cervical intraepithelial neoplasia(CIN) and normal cervix were included in this study. CD44v6 was stained positive in the basal and parabasal layer of normal epithelial cells homogenously but was absent in the stromal cells. The intensity of CD44v6 staining was the strongest in invasive squamous cell carcinoma followed by normal cervical epithelium, CIN, adenocarcinoma. In the malignant samples, heterogeneity in staining intensity among different clusters of tumor cells was observed. Furthermore the intensity of staining was stronger in proportion to stage, depth of invasion, lymphovascular invasion(p<0.05), and lymph node metastasis(p=NS). This study suggest that the expression of CD44v6 adhesion molecule may be useful value in predict the high stage, depth of invasion, lymphovascular invasion and lymph node metastasis probably.
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