Systematic study of tissue factor expression in solid tumors

Area of Science:

• Oncology
• Cancer Biology
• Immunohistochemistry

Background:

• Tissue factor (TF) expression is elevated in many solid cancers and linked to poor prognosis.
• Previous studies have not systematically compared TF expression across diverse solid tumor types in a single study.

Purpose of the Study:

• To systematically analyze the prevalence and cellular localization of TF expression in a wide range of solid cancers.
• To investigate the spatial and temporal variations of TF expression during disease progression and metastasis.

Main Methods:

• Immunohistochemistry (IHC) using a TF-specific antibody.
• Analysis of tumor tissue from patients with ovarian, esophageal, bladder, cervical, endometrial, pancreatic, prostate, colon, breast, non-small cell lung cancer (NSCLC), head and neck squamous cell carcinoma (HNSCC), and glioblastoma.
• Comparison of TF expression in primary tumors versus metastatic lesions and across different time points.

Main Results:

• TF was expressed in all tested cancer types, with the highest prevalence in pancreatic, cervical, colon, glioblastoma, HNSCC, and NSCLC.
• TF staining patterns varied, being predominantly membranous in some cancers (e.g., pancreatic) and cytoplasmic in others (e.g., glioblastoma).
• TF expression remained relatively consistent over time and between primary tumors and metastases, though individual patient variability was noted.

Conclusions:

• TF is broadly expressed across solid tumors.
• TF expression is maintained during tumor dissemination and treatment.
• TF represents a potential target for cancer therapy across multiple solid tumor types.