Abstract:
:Phosphatidylethanolamine-binding protein 4 (PEBP4), a member of the PEBP family, has been reported to play a pivotal role in tumor progression. However, its role in epithelial-to-mesenchymal transition (EMT) in non-small cell lung cancer (NSCLC) cells remains unclear. Here, we investigated the effects and underlying mechanism of PEBP4 in NSCLC EMT. Three human NSCLC cell lines (A549, H1299, and H460) were transfected with pcDNA3.1-PEBP4 or PEBP4-targeting small interfering RNA. Then, cell proliferation was analyzed by the MTT assay, and cell migration and invasion were analyzed by the transwell chamber assay. Protein and messenger RNA expression of the related genes and proteins were assessed by Western blot analysis and quantitative real-time polymerase chain reaction, respectively. Results showed that PEBP4 was highly expressed in the human lung cancer tissues and three human NSCLC cell lines. Pretreatment with pcDNA3.1-PEBP4 promoted the proliferation, invasion, and migration of NSCLC cells and increased EMT in vitro and lung tumor metastasis in vivo. Whereas knockdown of PEBP4 suppressed NSCLC cell migration, PEBP4, and invasion with prevented EMT. Furthermore, PEBP4 overexpression significantly promoted the transcriptional activity of sonic hedgehog (Shh) signaling in NSCLC cells. Further analysis showed that using cyclopamine to inhibit Shh signaling significantly ameliorated the effect on cell proliferation, invasion, and migration, as well as EMT triggered by PEBP4 overexpression. Together, these results suggest that PEBP4 may promote tumorigenesis in NSCLC by regulating cell proliferation and EMT via activation of the Shh signaling pathway.
journal_name
J Cell Biochemjournal_title
Journal of cellular biochemistryauthors
Jian W,Bai Y,Li X,Kang J,Lei Y,Xue Ydoi
10.1002/jcb.27817subject
Has Abstractpub_date
2019-04-01 00:00:00pages
5386-5395issue
4eissn
0730-2312issn
1097-4644journal_volume
120pub_type
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