Purpose: This study was aimed to detect the expression of PTPRZ1 in oral squamous cell carcinoma (OSCC) originated from oral submucous fibrosis (OSF), and discuss its role in the development and progression of OSCC originating from OSF as well as its clinical significance.
Methods: Immunohistochemisty (IHC) and Western blot (WB) for the expression and distribution of PTPRZ1 were carried out in 36 cases of OSF transforming into OSCC, 23 cases of OSCC and 21 cases of healthy controls. The data were analyzed by Chi-square test using SPSS 21.0 software package.
Results: IHC results demonstrated that the expression of PTPRZ1 in OSCC originated from the OSF was strongly positive and the rate of positive expression was 72.22%; expression of PTPRZ1 in OSCC was weakly positive, the positive rate was 43.47%; and the expression of PTPRZ1 in healthy controls was negative. The rate of PTPRZ1 positive expression was significantly higher in OSCC originated from OSF and OSCC with non-OSF than that of the healthy controls (P<0.01). The positive expression rate of OSCC originated from OSF was significantly higher than that of OSCC with non-OSF (P<0.05).WB results showed the expression of PTPRZ1 was weak in the healthy controls and in OSCC with non-OSF, but strong in OSCC originated from OSF. Correlation analysis between PTPRZ1 and clinical data showed PTPRZ1 was correlated with recurrence and metastasis positively (r=0.642, P<0.05; r=0.656, P<0.05).
Conclusions: Differential expression of PTPRZ1 in OSCC originating from OSF and OSCC with non-OSF was significant. PTPRZ1, which plays an important role in the processes of development, invasion and metastasis of OSCC originated from OSF, can be used as a molecular marker for early diagnosis and targeted gene for treatment of OSCC originating from OSF.
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