PTP4A1 promotes oral squamous cell carcinoma (OSCC) metastasis through altered mitochondrial metabolic reprogramming

Area of Science:

• Oncology
• Molecular Biology
• Biochemistry

Background:

• Protein tyrosine phosphatase 4A1 (PTP4A1) is implicated in various pro-oncogenic signaling pathways.
• Its specific role in oral squamous cell carcinoma (OSCC) pathogenesis requires further elucidation.

Purpose of the Study:

• To investigate the role of PTP4A1 in the growth and development of oral squamous cell carcinoma (OSCC).
• To explore the molecular mechanisms by which PTP4A1 influences OSCC progression.

Main Methods:

• Quantitative analysis of PTP4A1 expression in OSCC tissues and adjacent non-tumor tissues.
• In vitro assays to assess the impact of PTP4A1 overexpression on cell growth and invasion.
• In vivo studies to evaluate PTP4A1's effect on tumor progression.
• Molecular analyses to identify PTP4A1's binding partners and downstream targets, including PKM2 and ACO2.

Main Results:

• PTP4A1 is significantly overexpressed in OSCC cells and tissues compared to normal tissues.
• PTP4A1 overexpression enhances OSCC cell proliferation and invasion in vitro and promotes tumor growth in vivo.
• PTP4A1 regulates mitochondrial metabolic reprogramming in OSCC cells, contributing to their invasive potential.
• PTP4A1 interacts with PKM2 to promote its expression and with ACO2 to enhance its degradation.

Conclusions:

• PTP4A1 plays a critical role in promoting OSCC growth, invasion, and tumor progression.
• PTP4A1 mediates its effects by modulating mitochondrial metabolism through interactions with PKM2 and ACO2.
• PTP4A1 represents a promising therapeutic target for oral squamous cell carcinoma treatment.