RESUMO
Objective To investigate the expression of non receptor protein tyrosine phosphatase 12 (PTPN12) in hepatocellular carcinoma (HCC) and its adjacent tissues and investigate the relationship between the expression of non receptor protein and prognosis of hepatocellular carcinoma (HCC).Methods The expresson of PTPN12 protein in HCC tissues and adjacent liver tissues was detected by immunohistochemistry.The relationship between the expression of PTPN12 protein and prognosis of primary hepatocellular carcinoma was evaluated by rank correlation and Cox proportional hazards regression model.Results Compared with the adjacent liver tissues,the expression of PTPN12 protein in HCC tissues was significantly lower (55.83％ vs 43.12％,P＜0.005).Further analysis showed that the decreased expression of PTPN12 was closely related with tumor recurrence (x2 =4.346,P=0.015).Single factor analysis showed that the decreased expression of PTPN12 in hepatocellular carcinoma and liver cancer specific survival and recurrence of hepatocellular carcinoma related (x2=5.687,P＜0.001),and multivariate Cox proportional hazards regression model analysis showed that the expression of PTPN12 in patients with liver cancer were independent prognostic factors (x2 =6.687,P＜0.05).Conclusion The expression of PTPN12 protein was down or absent in human hepatocellular carcinoma,and the expression of PTPN12 may be a biomarker for the recurrence and prognosis of HCC patients.