He B, et al. Pathobiology 2020.
BACKGROUND: NudC domain containing 1 (NudCD1) is an oncoprotein related to diverse cancers. This study aims to investigate the expression, role, and regulatory mechanism of NudCD1 in non-small cell lung cancer (NSCLC).
METHODS: qRT-PCR, Western blot, and immunohistochemistry were performed to detect the expressions of NudCD1 in NSCLC tissues and cell lines. The correlation between NudCD1 expression and clinical features was determined by the χ2 test. Besides, shRNA was used to construct the NudCD1 low expression model of NCI-H1299 and NCI-H460 cells, and CCK-8 and transwell assay were conducted to monitor the changes of proliferation, migration, and invasion of cancer cells. The expression levels of epithelial-mesenchymal transition markers and IGF1R-ERK1/2 signaling pathway proteins were detected by Western blot.
RESULTS: The expression of NudCD1 in NSCLC was higher than that in normal tissues, and the increased expression of NudCD1 was significantly correlated with increased T stage and lymph node metastasis. Moreover, patients with high expression of NudCD1 had worse prognosis. NudCD1 knockdown was proven to impede the proliferation but facilitate the migration and invasion of cancer cells. Furthermore, knockdown of NudCD1 resulted in an increase in the expression of E-cadherin and a decrease in the expression of vimentin. We also observed that NudCD1 overexpression promoted the phosphorylation of IGF1R and ERK1/2 proteins.
CONCLUSION: NudCD1 promotes the proliferation and metastasis of NSCLC cells via activation of IGF1R-ERK1/2, which indicates that NudCD1 may be a potential therapy target of NSCLC.