CSN1 facilitates proliferation and migration of hepatocellular carcinoma cells by upregulating cyclin A2 expression

Fu,Hangwei; Zhang,Yida; Chen,Yin; Chen,Junying; Chen,Ping

doi:10.3892/mmr.2020.11684

CSN1 facilitates proliferation and migration of hepatocellular carcinoma cells by upregulating cyclin A2 expression

Authors:
- Hangwei Fu
- Yida Zhang
- Yin Chen
- Junying Chen
- Ping Chen
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Affiliations: Department of Hepatobiliary Surgery, Daping Hospital, Army Medical University, Chongqing 400042, P.R. China
Published online on: November 12, 2020 https://doi.org/10.3892/mmr.2020.11684
Article Number: 46
Copyright: © Fu et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Constitutive photomorphogenesis 9 signalosome subunit 1 (CSN1) plays an important role in the ubiquitin-proteasome pathway and regulates various cellular processes, such as the cell cycle and DNA repair. The CSN complex consists of eight subunits (CSN1 to CSN8) and regulates the tumorigenesis of a variety of tumor types. However, the exact role of CSN1 in hepatocellular carcinoma (HCC) remains unclear. The present study evaluated the expression and biological effects of CSN1 in HCC tissue samples and cell lines. CSN1 was significantly overexpressed in HCC tissue and cell lines, compared with their normal counterparts. In patients with HCC, elevated CSN1 levels correlated with tumor size, tumor metastasis and tumor stage. Loss‑of‑function assays indicated that CSN1 knockdown inhibited the proliferation and migration HCC cells. In addition, CSN1 promoted the expression of cyclin A2 in a ubiquitination‑independent manner. Lastly, xenograft experiments indicated that CSN1 promoted HCC tumor growth in vivo. The present study suggested that CSN1 inhibition could represent a potential approach for the prevention of HCC progression and metastasis.

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