FBP1 expression is associated with basal-like breast carcinoma

Area of Science:

• Oncology
• Molecular Biology
• Biochemistry

Background:

• Molecular subtyping of breast carcinoma is crucial for prognosis and treatment.
• Fructose-1,6-bisphosphatase (FBP1) and hypoxia-inducible factor-1α (HIF-1α) are implicated in cancer metabolism and progression.
• Understanding the role of FBP1 and HIF-1α in breast cancer subtypes can refine diagnostic and prognostic strategies.

Purpose of the Study:

• To investigate the utility of FBP1 and HIF-1α in the molecular subtyping of breast carcinoma.
• To correlate the expression levels of FBP1 and HIF-1α with clinicopathological features and survival outcomes.
• To explore the relationship between FBP1 and HIF-1α expression in different breast cancer subtypes.

Main Methods:

• Immunohistochemical staining was performed on 60 breast carcinoma tissue specimens for cytokeratin 5/6, HIF-1α, and FBP1.
• Expression levels of HIF-1α and FBP1 were analyzed and compared across molecular subtypes.
• Correlation with clinicopathological factors and disease-free survival was assessed using statistical analyses, including Cox regression.

Main Results:

• HIF-1α expression was observed in 33.3% of cases and was associated with lymph node metastasis and shorter disease-free survival.
• FBP1 expression was detected in 55% of tumors and correlated with nuclear grade and tumor stage.
• A significant negative correlation was found between HIF-1α and FBP1 expression levels (r=-0.711, P<0.001).
• Basal-like breast carcinoma showed lower FBP1 expression compared to luminal type breast cancer.
• FBP1 and tumor size were identified as independent prognostic factors.

Conclusions:

• FBP1 and HIF-1α are valuable markers for molecular subtyping and prognosis in breast carcinoma.
• Low FBP1 expression in basal-like breast cancer may indicate a poorer prognosis and reduced disease-free survival.
• The inverse correlation between HIF-1α and FBP1 suggests a complex interplay in breast cancer pathogenesis.