Correlation between BOLD-MRI and HIF expression level in renal carcinoma

Area of Science:

• Oncology
• Medical Imaging
• Biochemistry

Background:

• Renal carcinoma accounts for 2-3% of malignant tumors and is the most common primary kidney cancer.
• Tumor oxidative levels are crucial for treatment planning, efficacy evaluation, and prognosis prediction.

Purpose of the Study:

• To investigate the correlation between R2(*) values measured by BOLD-MRI and tumor hypoxia markers in a mouse renal carcinoma model.
• To explore the potential of BOLD-MRI and hypoxia-inducible factor (HIF) expression as biomarkers for renal carcinoma.

Main Methods:

• A renal carcinoma mouse model was established using human ACHN cells.
• BOLD-MRI was performed under normal inhalation (R2a(*)) and carbogen treatment (R2b(*)) to calculate ΔR2(*).
• Immunohistochemical staining for HIF-1α and HIF-2α was conducted, and correlations with R2(*) values were analyzed.

Main Results:

• A significant negative correlation was found between R2a(*) and ΔR2(*).
• A significant positive correlation was observed between ΔR2(*) and HIF-2α expression.
• HIF-1α expression did not correlate with tumor R2(*) values.

Conclusions:

• The study suggests that combined BOLD-MRI and HIF-2α staining may aid in the clinical diagnosis of renal carcinoma.
• HIF-2α shows potential as a biological marker for kidney cancer.