The cell cycle regulator 14-3-3σ opposes and reverses cancer metabolic reprogramming

Area of Science:

• Oncology
• Molecular Biology
• Cancer Metabolism

Background:

• Cancer cells exhibit significant metabolic reprogramming to support rapid growth.
• The precise molecular mechanisms governing this metabolic shift are not fully elucidated.

Purpose of the Study:

• To investigate the role of 14-3-3σ in regulating cancer metabolic reprogramming.
• To determine if 14-3-3σ acts as a tumor suppressor by influencing metabolic pathways.

Main Methods:

• Investigated the effect of 14-3-3σ on c-Myc ubiquitination and degradation.
• Assessed the impact of 14-3-3σ on key cancer metabolic processes including glycolysis and glutaminolysis.
• Correlated 14-3-3σ expression levels with patient survival and tumor metabolic characteristics in breast cancer.

Main Results:

• 14-3-3σ enhances c-Myc poly-ubiquitination and degradation, opposing tumor-promoting metabolic programs.
• 14-3-3σ suppresses major cancer metabolic pathways such as glycolysis, glutaminolysis, and mitochondrial biogenesis.
• 14-3-3σ expression levels correlate with patient survival, tumor glucose uptake, and metabolic gene expression in breast cancer.

Conclusions:

• 14-3-3σ is a crucial regulator of tumor metabolism, inhibiting cancer progression.
• Loss of 14-3-3σ expression is essential for cancer metabolic reprogramming.
• Elevating 14-3-3σ function represents a potential therapeutic strategy for targeted anticancer metabolism therapy.