[Expression of Skp2 and PTEN and its correlation in glottic carcinoma].

Objective: To investigate the expression and clinical significance of Skp2 and PTEN in glottic carcinoma and the relationship between the two genes.

Method: Formalin-fixed and paraffin-embedded tissues, which came from 42 cases of glottic carcinoma and 16 cases of atypical hyperplasia of vocal fold and 27 cases of vocal cord polyp, were detected for the expression of Skp2, PTEN by SP immunohistochemistry, then we analyzed the result statistically.

Result: The expression rates of Skp2 protein in vocal cord polyp, atypical hyperplasia of vocal cord and glottic carcinoma were 11.11%, 37.50%, 40.48% respectively. There was significant difference among them (P < 0.01); the expression rates of PTEN protein in vocal cord polyp, atypical hyperplasia of vocal cord and glottic carcinoma were 100.00%, 75.00%, 52.38% respectively. There was significant difference among them (P < 0.05), the expressions of Skp2 and PTEN in glottic carcinoma were associated with clinical stage, lymph nodal metastases and prognosis (P < 0.05); there was a negative correlation between the expression of Skp2 and PTEN, and their correlation coefficient was r= -0.4301 (P < 0.01).

Conclusion: The expressions of Skp2 and PTEN may play an important roles in the tumorigenesis, metastases and poor prognosis of glottic carcinoma. These changes may be the early molecular event of the carcinogenesis. The high expression of Skp2 was negative correlation with the lower PTEN in glottic carcinoma.