Expression and Significance of SHP-2 in Human Papillomavirus Infected Cervical Cancer

This study investigated the expression and prognostic value of SHP-2 in cervical cancer caused by human papillomavirus (HPV) infection. Forty-five specimens from patients with cervical can-cer (stageⅠ-Ⅲ), 32 specimens from patients with cervical intraepithelial neoplasia (CIN) (Ⅰ, Ⅱ) and 20 normal cervical samples from patients with hysteromyoma were collected in Department of Pathol-ogy for comparison. The expression levels of SHP-2 and IFN-β proteins were detected by using immu-nohistochemistry. The mRNA expression level of SHP-2 was detected by using quantitative real-time polymerase chain reaction (PCR). HPVs were detected by HPV GenoArray Test. The Spearman corre-lation was used to compare the expression level of SHP-2 in HPV infected cervical cancer vs non-HPV infected normal cervix. The level of SHP-2 protein expression in the cancer tissues (88.8%) was sig-nificantly higher than in CIN tissues (62.5%) and normal cervixes (45%) (P0.05 and P0.05, respec-tively). The SHP-2 mRNA levels in the cancer tissues were upregulated as compared with those in the normal cervixes (P0.05). Twenty-one (46.7%) cervical cancers, 25 (78.1%) CINs and 17 (85%) normal cervixes showed IFN-β positive staining in cytoplasm. There was statistically significant difference in the expression rate of IFN-β between cervical cancer and normal cervix (χ2=8.378, P0.05) as well as between cervical cancer and CIN (χ2=7.695, P0.05). HPV16/18 infections could be found in normal cervixs (15%), CINs (68.7%) and cervical cancers (84.4%). There was a correlation between HPV in-fection and SHP-2 expression in cervical cancer (rs=0.653, P0.05). SHP-2 may be a useful prognostic and diagnostic indicator for HPV infected cervical cancer. In cervical cancers, SHP-2 mRNA and pro-tein overexpression was associated with IFN-β lower-expression.