Complex biochemical analysis of human breast tumor tissue

Area of Science:

• Oncology
• Biochemistry
• Molecular Biology

Background:

• Breast carcinoma exhibits diverse biochemical profiles.
• Understanding receptor and antigen expression is crucial for breast cancer research.

Purpose of the Study:

• To quantitatively analyze biochemical markers in human breast carcinomas.
• To investigate the incidence and co-occurrence of specific biomarkers.
• To explore correlations between biochemical markers, tumor differentiation, and prognosis.

Main Methods:

• Quantitative biochemical analysis of 76 human breast carcinoma tissue specimens.
• Assay for cytosolic estrogen receptors (cER), nuclear estrogen receptors (nER), progesterone receptors (PgR), 1,25-dihydroxycholecalciferol receptors (DR), carcinoembryonic antigen (CEA), alpha-lactalbumin (aLA), and gamma-glutamyl transferase (gGT).
• Statistical analysis to assess differences related to tumor differentiation, vascular invasion, and patient prognosis.

Main Results:

• Highest incidence observed for CEA (76%), DR (70%), and aLA (62%).
• Significant co-occurrence of DR and CEA (61%).
• Lower aLA values in tumors invading lymphatic/blood vessels compared to those invading adipose/connective tissues (p<0.05).
• Gamma-glutamyl transferase (gGT) levels were significantly lower in tumors with progression during a 2-3 year follow-up.

Conclusions:

• CEA, DR, and aLA are prevalent biomarkers in breast carcinomas.
• DR and CEA frequently occur together.
• gGT emerges as a promising prognostic indicator in breast cancer, with lower levels suggesting tumor progression.