USP2-Related Cellular Signaling and Consequent Pathophysiological Outcomes

Area of Science:

• Biochemistry and Molecular Biology
• Cellular Biology
• Physiology

Background:

• Ubiquitin specific protease 2 (USP2) is a deubiquitinating enzyme with diverse cellular functions.
• USP2 plays roles in cell cycle regulation, carcinogenesis, and circadian rhythm.
• USP2 influences metabolic pathways, immune responses, and ion channel expression.

Purpose of the Study:

• To review the multifaceted roles of USP2 in cellular events.
• To identify signaling molecules upstream and downstream of USP2.
• To describe phenotypic differences in USP2 experimental models.

Main Methods:

• Literature review of USP2 functions.
• Analysis of USP2's impact on cell cycle regulators (cyclins, Aurora-A).
• Examination of USP2's role in CLOCK/BMAL1 complex and metabolic pathways.

Main Results:

• USP2 deubiquitinates cyclins and Aurora-A, affecting cell cycle and carcinogenesis.
• USP2 targets tumorigenic molecules like EGF and fatty acid synthase, and inhibits p53 signaling.
• USP2 variants impact hepatic gluconeogenesis, cholesterol uptake, adipose inflammation, and insulin sensitivity.
• USP2 influences cytokine production and signaling, and promotes ion channel surface expression.
• Usp2 knockout mice show altered locomotion and male fertility.

Conclusions:

• USP2 is a critical regulator of cell cycle, carcinogenesis, and circadian rhythms.
• USP2 significantly impacts metabolic homeostasis and immune function.
• USP2's diverse roles highlight its potential as a therapeutic target.