TPS(TM) a circulating tumor marker in breast cancer

Area of Science:

• Oncology
• Biomarkers
• Cancer Diagnostics

Background:

• Tissue polypeptide specific antigen (TPS) is linked to human cytokeratin 18, reflecting tumor cell activity.
• TPS serves as a dynamic marker for treatment response, distinct from tumor burden indicators.

Purpose of the Study:

• To evaluate the utility of TPS in early detection of breast cancer recurrence.
• To assess the role of TPS in monitoring treatment efficacy and predicting prognosis in metastatic breast cancer.
• To explore the combined use of TPS and CA 15-3 for improved breast cancer management.

Main Methods:

• Serial determination of circulating TPS levels in patients with metastatic breast cancer.
• Correlation of pretreatment TPS levels with patient prognosis.
• Monitoring TPS level changes during therapy to assess treatment response.
• Comparison of TPS and CA 15-3 combination versus imaging methods for recurrence detection.

Main Results:

• Pretreatment TPS levels correlate with prognosis in metastatic breast cancer.
• Decreasing TPS levels during therapy indicate treatment response and favorable prognosis.
• Increasing TPS levels can predict disease progression with a significant lead time.
• Combining TPS with CA 15-3 enhances breast cancer management effectiveness.

Conclusions:

• Serial TPS and CA 15-3 serum determinations are valuable for monitoring metastatic breast cancer therapy.
• Tumor marker monitoring, including TPS, can be a simpler, more sensitive, and cost-effective alternative to imaging for early recurrence detection post-surgery.