Abstract：Objective: To detect the expression of PTEN, p-Akt and VEGF protein in tissue of non small-cell lung cancer group and normal control groups, and discuss the mechanism of these three proteins in the pathogenesis of non-small cell lung cancer. Methods: 82 cases of tissue samples with non small-cell lung cancer and fifty eight cases of tissue samples from alveolus health control, and fifty six cases of tissue samples from bronchus health control were collected. The expression levels of them was measured by immunohistochemistry method and analyzed the relationship with the clinical and pathological data. Results: The expression of p-Akt and VEGF protein in lung cancer group, squamous cell carcinoma of the lung group and lung adenocarcinoma group was significantly higher than which in double normal control groups(P<0.01).p-Akt and VEGF expression in lung tissue were positively correlated. The expression levels of p-Akt protein were related to tumor size, differentiation degree, clinical stage and lymph node metastasis. The expression levels of VEGF protein were related to differentiation degree , clinical stage and lymph node metastasis. The expression levels of PTEN protein in lung cancer group, squamous cell carcinoma of the lung group and lung adenocarcinoma group is significantly lower than which in double normal control groups(P<0.01). The expression levels of PTEN protein were related to differentiation degree, clinical stage and lymph node metastasis. PTEN is negatively correlated with p-Akt and VEGF in tumor tissues. Conclusion: P-Akt and vascular endothelial growth factor play a synergistic role in the occurrence, invasion and metastasis of non-small cell lung cancer, and PTEN plays an inhibitory role.
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2019, Vol. 25 
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