Abstract
Kruppel-like factor 4 (Klf4) was reported to have both tumor suppressive and oncogenic roles on tumorigenesis, which is depend on its subcellular localization. In this study, the expression and subcellular localization of Klf4 in non-small cell lung cancer (NSCLC) patients as well as its clinical significance were analyzed, and the expression and subcellular localization of Klf4 in A549 cells and A549/DDP cells were detected. The results showed that the expression of Klf4 in nucleus was related to the histological grade and clinical stage of NSCLC patients. Moreover, the subcellular localization of Klf4 is the independent risk factor for NSCLC, and the high expression of Klf4 in nucleus could lead to a poor prognosis, while the high expression of Klf4 in cytoplasm could lead to a prominent prognosis for NSCLC patients. In addition, the nuclear Klf4 expression in A549/DDP cells was higher than that in A549 cells, while the cytoplasmic Klf4 expression in A549/DDP cells was lower than that in A549 cells, indicating that the subcellular localization of Klf4 might be related to the resistance of A549 cells to cisplatin. The study indicates that Klf4 could be a potential therapeutic target in NSCLC.
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