Abstract:
:The Nemo‑like kinase (NLK), a conserved serine/threonine kinase, plays a critical role in the regulation of a variety of transcription factors, with important roles in determining cell fate. Although recent studies have demonstrated decreased expression patterns of NLK in various types of human cancer, the functional mechanism of NLK in cancer development has not been elucidated. Here, in the present study overexpression of NLK was found to inhibit the growth and migration of the non‑small cell lung cancer A549 cell line. NLK was subsequently found to interact with 14‑3‑3ζ (also known as YWHAZ), which is responsible for E‑cadherin silencing during epithelial‑mesenchymal transition (EMT). Furthermore, NLK overexpression was able to restore the expression of E‑cadherin inhibited by 14‑3‑3ζ. Notably, NLK interacts with 14‑3‑3ζ and prevents its dimerization, which is essential for 14‑3‑3ζ stability and function. By fusing two copies of the 14‑3‑3ζ gene, via a Gly‑rich linker, a non‑dissociable dimer of 14‑3‑3ζ was formed. It was found that NLK was unable to restore the expression of E‑cadherin inhibited by the overexpression of the fused dimer of 14‑3‑3ζ. In addition, the increased ability of migration induced by the overexpression of fused 14‑3‑3ζ dimer could not be altered by NLK overexpression. The results from the present study indicate that NLK is a negative regulator of 14‑3‑3ζ and plays a tumor suppressive role in the inhibition of cancer cell migration.
journal_name
Oncol Repjournal_title
Oncology reportsauthors
Chen J,Lin Q,Ni T,Zhao J,Lin F,Lu X,Lv Y,Ren S,Liu Z,Zhang T,He S,Shen D,Mao Wdoi
10.3892/or.2020.7557subject
Has Abstractpub_date
2020-06-01 00:00:00pages
1845-1852issue
6eissn
1021-335Xissn
1791-2431journal_volume
43pub_type
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