PP2A as a potential therapeutic target for breast cancer: Current insights and future perspectives

Area of Science:

• Oncology
• Molecular Biology
• Biochemistry

Background:

• Breast cancer is the most common malignancy globally, with unsatisfactory therapeutic outcomes.
• Protein phosphatase 2A (PP2A) is a key regulator of cellular processes, frequently dysregulated in cancer.
• PP2A's dual role as a tumor suppressor and promoter in oncogenesis is increasingly recognized.

Purpose of the Study:

• To review the literature on the multifaceted role of PP2A in tumor development, with a focus on breast cancer.
• To explore PP2A's involvement in critical cancer pathways, including cell cycle control, DNA damage response, and immune modulation.
• To identify potential therapeutic targets and strategies for breast cancer treatment based on PP2A regulation.

Main Methods:

• Comprehensive literature analysis of PP2A's function in various cancers, particularly breast cancer.
• Examination of PP2A's impact on key cellular processes relevant to tumor initiation and progression.
• Review of existing and potential therapeutic strategies targeting PP2A in breast cancer.

Main Results:

• PP2A exhibits complex and often opposing roles in breast cancer, influencing tumor suppression and promotion.
• Dysregulation of PP2A affects critical pathways such as cell cycle control, DNA damage response, and immune evasion.
• PP2A targets like the epidermal growth factor receptor and mechanisms of cell death resistance are implicated in breast cancer progression.

Conclusions:

• The contradictory functions of PP2A in breast cancer necessitate further investigation into its precise molecular mechanisms.
• Understanding PP2A's dual role is crucial for developing novel and effective therapeutic strategies.
• Targeting PP2A pathways offers potential for influencing drug development and improving breast cancer treatment outcomes.