Sgo1 is a potential therapeutic target for hepatocellular carcinoma

Lyu Han Wang, Chia Jui Yen, Tian Neng Li, Sabine Elowe, Wen Ching Wang, Lily Hui Ching Wang

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

Shugoshin-like protein 1 (Sgo1) is an essential protein in mitosis; it protects sister chromatid cohesion and thereby ensures the fidelity of chromosome separation. We found that the expression of Sgo1 mRNA was relatively low in normal tissues, but was upregulated in 82% of hepatocellular carcinoma (HCC), and correlated with elevated alpha-fetoprotein and early disease onset of HCC. The depletion of Sgo1 reduced cell viability of hepatoma cell lines including HuH7, HepG2, Hep3B, and HepaRG. Using time-lapse microscopy, we showed that hepatoma cells were delayed and ultimately die in mitosis in the absence of Sgo1. In contrast, cell viability and mitotic progression of immortalized cells were not significantly affected. Notably, mitotic cell death induced upon Sgo1 depletion was suppressed upon inhibitions of cyclin-dependent kinase-1 and Aurora kinase-B, or the depletion of mitotic arrest deficient-2. Thus, mitotic cell death induced upon Sgo1 depletion in hepatoma cells is mediated by persistent activation of the spindle assembly checkpoint. Together, these results highlight the essential role of Sgo1 in the maintenance of a proper mitotic progression in hepatoma cells and suggest that Sgo1 is a promising oncotarget for HCC.

Original languageEnglish
Pages (from-to)2023-2033
Number of pages11
JournalOncotarget
Volume6
Issue number4
DOIs
Publication statusPublished - 2015

All Science Journal Classification (ASJC) codes

  • Oncology

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