Abstract
Yes-associated protein (YAP), the nuclear effector of the Hippo pathway, is a key regulator of organ size and a candidate human oncogene. This study aimed to assess the clinical significance and biological functions of YAP in non-small-cell lung cancer (NSCLC). We investigated the expression of YAP in 92 cases of NSCLC tissue by immunohistochemistry and found that YAP was expressed in 66.3% (61/92) cases and predominantly presented in the nucleus. The expression of YAP in NSCLC was significantly correlated with p-TNM stage (P = 0.0037) and lymph node metastasis (P = 0.0093). Importantly, YAP expression was associated with short overall survival. Further study in NSCLC cell lines in which YAP was either overexpressed or depleted confirmed that YAP markedly promoted cell proliferation and invasion. These results indicate that YAP plays an important role in NSCLC and might be a useful therapeutic target of NSCLC.
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