Related Experiment Video For CSN1
Updated: Nov 30, 2025

Analysis of Liver Microenvironment During Early Progression of Non-Alcoholic Fatty Liver Disease-Associated Hepatocellular Carcinoma in Zebrafish
Published on: April 1, 2021
CSN1 facilitates proliferation and migration of hepatocellular carcinoma cells by upregulating cyclin A2 expression
Hangwei Fu1, Yida Zhang1, Yin Chen1
1Department of Hepatobiliary Surgery, Daping Hospital, Army Medical University, Chongqing 400042, P.R. China.
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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