Abstract:
:Nucleolar protein interacting with the FHA domain of pKi-67 (NIFK) is a Ki-67-interacting protein. However, its precise function in cancer remains largely uninvestigated. Here we show the clinical significance and metastatic mechanism of NIFK in lung cancer. NIFK expression is clinically associated with poor prognosis and metastasis. Furthermore, NIFK enhances Ki-67-dependent proliferation, and promotes migration, invasion in vitro and metastasis in vivo via downregulation of casein kinase 1α (CK1α), a suppressor of pro-metastatic TCF4/β-catenin signaling. Inversely, CK1α is upregulated upon NIFK knockdown. The silencing of CK1α expression in NIFK-silenced cells restores TCF4/β-catenin transcriptional activity, cell migration, and metastasis. Furthermore, RUNX1 is identified as a transcription factor of CSNK1A1 (CK1α) that is negatively regulated by NIFK. Our results demonstrate the prognostic value of NIFK, and suggest that NIFK is required for lung cancer progression via the RUNX1-dependent CK1α repression, which activates TCF4/β-catenin signaling in metastasis and the Ki-67-dependent regulation in cell proliferation.
journal_name
Elifejournal_title
eLifeauthors
Lin TC,Su CY,Wu PY,Lai TC,Pan WA,Jan YH,Chang YC,Yeh CT,Chen CL,Ger LP,Chang HT,Yang CJ,Huang MS,Liu YP,Lin YF,Shyy JY,Tsai MD,Hsiao Mdoi
10.7554/eLife.11288subject
Has Abstractpub_date
2016-03-17 00:00:00issn
2050-084Xjournal_volume
5pub_type
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