Jiang ZM, Li HB, Chen SG. PIMREG, a Marker of Proliferation, Facilitates Aggressive Development of Cholangiocarcinoma Cells Partly Through Regulating Cell Cycle-Related Markers.
Technol Cancer Res Treat 2020;
19:1533033820979681. [PMID:
33356974 PMCID:
PMC7768323 DOI:
10.1177/1533033820979681]
[Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Background:
Phosphatidylinositol binding clathrin assembly protein interacting mitotic
regulator (PIMREG) is a protein associated with cell proliferation. Its
aberrant expression was reported to be correlated with the development in
multiple tumors. However, its role in cholangiocarcinoma (CAA) has not yet
been evaluated in detail.
Methods:
Data were acquired from the public TCGA database for evaluating the
expression pattern of PIMREG and assessing its clinical relevance as well as
its correlation with overall survival. RBE and HUH28 cell lines were
selected to perform loss- and gain-of-function of PIMREG assays
respectively. Quantitative real-time PCR (RT-qPCR) and western blot analyses
were used to measure the mRNA and protein levels of PIMREG. Cell Counting
Kit-8, colony formation tests, and Transwell assays served to measure the
effect of PIMREG on the proliferative, invasive and migratory capacities of
CAA cells, appropriately. Gene set enrichment analysis (GSEA) was conducted
to identify PIMREG associated gene set, which was further confirmed by
western blot.
Results:
PIMREG was found to be highly expressed in CAA tissues and cell lines
according to the public dataset and RT-qPCR analysis, and negatively related
to the prognosis of patients with CAA. Moreover, knockdown of PIMREG
suppressed and overexpression of PIMREG promoted the proliferation, invasion
and migration of CAA cells. Furthermore, GSEA revealed that high PIMREG
expression was positively associated with cell cycle signaling. And the next
western blot analysis demonstrated that silencing PIMREG resulted in a
reduction on the levels of p-CDK1, CCNE1, and CCNB1, whereas PIMREG
overexpression led to an opposite result.
Conclusion:
The results suggested that PIMREG facilitates the growth, invasion and
migration of CAA cells partly by regulating the cell cycle relative
biomarkers, revealing that PIMREG may be a crucial molecule in the
progression of CAA.
Collapse