Human Pathology   2016 年 56 卷

2016.10.01

Lung cancer has always been the leading cause of death among patients with malignant tumors, and the majority of these patients die because of cancer cell invasion and metastasis. Previous studies have implicated coiled-coil domain-containing protein 8 (CCDC8) as a tumor suppressor in several types of cancer, such as breast and prostate cancers. However, the expression levels or functions of CCDC8 in lung cancer have not been elucidated. Here, we used immunohistochemical staining to measure CCDC8 expression in 147 samples from tumors and 30 samples from the adjacent normal lung tissues of patients with non??“small cell lung cancer. CCDC8 was shown to be located predominantly in the cytoplasm and partially on the cell membrane, and its expression level was significantly lower in lung cancer samples than that in the adjacent normal lung tissues (P??=??.001). CCDC8 expression was closely related to tumor differentiation (P??=??.039), tumor-node-metastasis stage (P??=??.009), lymph node metastasis (P??=??.038), and prognosis (P??=??.043) of lung cancer. Transfection of A549 cells with CCDC8 significantly reduced cell invasion and migration (P??