Deubiquitylating Enzymes in Hepatocellular Carcinoma
Xingyu Mi1, Qingfeng Li2, Guo Long1
1Department of Liver Surgery, Xiangya Hospital, Central South University, 110 Xiangya Road, Changsha, Hunan 410078, China.
Abstract:
Ubiquitination is a reversible and dynamic process, precisely regulated by ubiquitin-activating enzymes (E1), ubiquitin-conjugating enzymes (E2), ubiquitin ligases (E3), and deubiquitinating enzymes (DUBs). Dysregulation of DUBs disrupts the dynamic balance of ubiquitination, contributing to the development of various diseases, particularly cancer. An increasing number of studies have identified dysregulation of DUBs in various tumor types and have explored their regulatory mechanisms in these contexts. Hepatocellular carcinoma (HCC), the most common form of liver cancer, is highly malignant and has limited treatment options, necessitating the exploration of additional therapeutic strategies. Current research has identified dysregulation of DUBs in HCC, but their mechanisms of action remain poorly understood. Given the large number of DUB family members, there is significant potential for further investigation. This review summarizes the DUBs associated with HCC, including their structures, functions, and the mechanisms through which they regulate HCC development. Furthermore, we provide a brief overview of the discussed DUBs, aiming to offer new perspectives for future HCC research.
Insights
Deubiquitinating enzymes (DUBs) regulate ubiquitination. Dysregulated DUBs are linked to hepatocellular carcinoma (HCC), a deadly liver cancer, highlighting their potential as therapeutic targets.
Area of Science:
- Biochemistry and Molecular Biology
- Oncology
- Cellular Regulation
Background:
- Ubiquitination, a critical cellular process, is tightly controlled by enzymes including deubiquitinating enzymes (DUBs).
- The dysregulation of DUBs disrupts ubiquitination homeostasis, contributing to various diseases, notably cancer.
- Hepatocellular carcinoma (HCC) is an aggressive liver cancer with limited therapeutic options, underscoring the need for novel treatment strategies.
Purpose of the Study:
- To review and summarize the deubiquitinating enzymes (DUBs) implicated in hepatocellular carcinoma (HCC).
- To elucidate the structures, functions, and regulatory mechanisms of DUBs in HCC development.
- To provide insights into potential therapeutic strategies targeting DUBs in HCC.
Main Methods:
- Literature review of existing studies on DUBs and their roles in HCC.
- Analysis of DUB structures and functions relevant to cancer biology.
- Synthesis of current knowledge on DUBs' mechanisms in HCC pathogenesis.
Main Results:
- Numerous DUBs have been identified as dysregulated in various tumor types, including HCC.
- Specific DUBs play crucial roles in regulating HCC cell proliferation, survival, and metastasis.
- The precise mechanisms by which many DUBs influence HCC remain incompletely understood.
Conclusions:
- DUBs represent a promising class of therapeutic targets for hepatocellular carcinoma.
- Further research into the specific roles and mechanisms of DUBs in HCC is warranted.
- Understanding DUBs offers new avenues for developing innovative HCC treatments.
Related Concept Videos
The Proteasome
In this pathway, the target proteins are first tagged with small proteins called ubiquitin. This involves participation of a series of enzymes including— E1 (ubiquitin-activating enzyme), E2 (ubiquitin-conjugating enzyme), and E3...
Regulated Protein Degradation
Protein degradation plays two important roles in the cells. It helps to protect cells from misfolded or damaged proteins before they lead to a...
Receptor Downregulation in MVBs
The EGFR can initiate signaling pathways that lead to cell proliferation, migration, and differentiation. Overexpression of EGFR stimulates cells to proliferate. Excessive EGFR...
Covalently Linked Protein Regulators
These groups modify specific amino acids in a protein....
Export of Misfolded Proteins out of the ER
Drug Metabolism: Phase II Reactions


