REGγ accelerates melanoma formation by regulating Wnt/β-catenin signalling pathway

Area of Science:

• Oncology
• Molecular Biology
• Cancer Research

Background:

• The proteasome activator REGγ is implicated in various cancer pathways.
• The specific role and mechanisms of REGγ in melanoma development are not well understood.

Purpose of the Study:

• To investigate the impact of REGγ on human melanoma cell proliferation in vitro and in vivo.
• To elucidate the molecular mechanisms by which REGγ influences melanoma progression.

Main Methods:

• REGγ was knocked down in human melanoma cell lines and mouse models.
• Melanoma cell proliferation, cell cycle, and xenograft growth were assessed.
• The Wnt/β-catenin signaling pathway, including GSK-3β degradation and β-catenin levels, was analyzed.
• REGγ and β-catenin expression was evaluated in human melanoma samples.

Main Results:

• Knockdown of REGγ significantly inhibited melanoma cell growth and induced G1 phase arrest.
• REGγ depletion suppressed xenograft tumor growth in vivo.
• REGγ was found to activate the Wnt/β-catenin pathway by degrading GSK-3β.
• Inhibition of β-catenin blocked cell proliferation in REGγ-expressing melanoma cells.
• Human melanoma samples showed overexpression of REGγ, correlating positively with β-catenin levels.

Conclusions:

• REGγ is a key regulator in melanoma development, primarily through the Wnt/β-catenin signaling pathway.
• Targeting REGγ presents a potential therapeutic strategy for melanoma treatment.