VEGF expression in osteosarcoma correlates with vascular permeability by dynamic MRI

Area of Science:

• Oncology
• Radiology
• Biomarkers

Background:

• Osteosarcoma is a primary bone cancer with a poor prognosis, often linked to pulmonary metastasis.
• Vascular endothelial growth factor (VEGF) is implicated in tumor angiogenesis and metastasis in osteosarcoma.
• Dynamic enhanced magnetic resonance imaging (DE-MRI) is a radiological technique used to evaluate tumor vascularity.

Purpose of the Study:

• To investigate the correlation between VEGF expression and vascular permeability in osteosarcoma.
• To explore the utility of DE-MRI as a noninvasive method for assessing tumor angiogenic activity in osteosarcoma.
• To determine if DE-MRI findings can predict prognosis in osteosarcoma patients.

Main Methods:

• Fifty-five osteosarcoma patients underwent DE-MRI as part of a treatment protocol.
• Tumor tissues from 15 patients were analyzed for VEGF expression using immunohistochemical studies.
• A two-compartment model quantified vascular permeability (kep) from DE-MRI data.
• VEGF expression was graded based on staining intensity and cell positivity.

Main Results:

• Osteosarcoma tumors with positive VEGF expression exhibited significantly higher mean vascular permeability compared to VEGF-negative tumors.
• A positive correlation was observed between increasing VEGF expression levels and enhanced vascular permeability.
• DE-MRI signal enhancement demonstrated an association with VEGF expression in osteosarcoma.

Conclusions:

• DE-MRI can noninvasively assess vascular permeability in osteosarcoma.
• Findings suggest a correlation between VEGF expression, vascular permeability, and DE-MRI signal enhancement.
• DE-MRI holds potential as a tool for prognostication in osteosarcoma by evaluating tumor angiogenic activity.