IMMUNOBIOLOGICAL MONITORING OF VARIOUS GASTROINTESTINAL AND PRIMARY HEPATIC MALIGNANCIES

Area of Science:

• Oncology
• Immunology
• Biochemistry

Background:

• Carcinoembryonic antigen (CEA) and alpha fetoprotein (AFP) are established tumor markers.
• Their utility in differentiating gastrointestinal (GI) and primary hepatic malignancies requires further investigation.
• Immune system modulation in cancer pathogenesis is an area of active research.

Purpose of the Study:

• To evaluate the diagnostic and prognostic value of CEA and AFP in GI and primary hepatic malignancies.
• To explore the relationship between CEA and AFP levels and immune system activity (cytokines and immunoglobulins).
• To differentiate primary liver cancers from liver metastases using these markers.

Main Methods:

• Enzyme-labelled immunoassay was used to measure CEA and AFP levels in 75 cancer patients.
• Patients were categorized into early pre-operative, post-operative, and metastatic non-operative groups.
• Interleukin-1 alpha (IL-1a), Interleukin-2 Receptor (IL-2R), and immunoglobulin levels were assessed to monitor T and B cell function.

Main Results:

• Significantly higher mean CEA levels were observed in metastatic GI malignancies compared to early and post-operative cases.
• Variable AFP levels were detected in primary hepatic malignancies.
• Simultaneous assay of CEA and AFP helped differentiate primary liver cancers from liver metastases, with higher CEA in metastases.
• Elevated IL-1a and IL-2R levels correlated with higher CEA and AFP, indicating T cell involvement in tumor antigen production.

Conclusions:

• CEA and AFP are valuable markers for staging GI malignancies and differentiating primary hepatic tumors from metastases.
• Immune monitoring, specifically T cell activity, is linked to tumor antigen production.
• These findings suggest a role for immune status in the dynamics of tumor marker expression.