Vascular endothelial growth factor in chronic subdural haematomas

Area of Science:

• Neuroscience
• Molecular Biology
• Pathology

Background:

• Chronic subdural hematomas (CSH) are collections of blood that can expand over time.
• The molecular mechanisms driving CSH expansion are not fully understood.

Purpose of the Study:

• To investigate the role of angiogenic factors, specifically vascular endothelial growth factor (VEGF) and basic fibroblast growth factor (bFGF), in the expansion of CSH.
• To elucidate the cellular sources of these factors within the CSH.

Main Methods:

• Quantification of VEGF and bFGF in CSH fluid and patient serum using enzyme-linked immunosorbent assay (ELISA).
• Analysis of VEGF messenger RNA (mRNA) expression in surgical specimens of CSH membranes via in situ hybridization.

Main Results:

• VEGF concentrations were significantly higher in CSH fluid (10277 pg/ml) and serum (355 pg/ml) compared to bFGF (haematoma: 3.04 pg/ml; serum: 4.74 pg/ml).
• In situ hybridization revealed overexpression of VEGF mRNA in macrophages and vascular endothelial cells within the outer membrane of the CSH.

Conclusions:

• Enhanced production of VEGF by macrophages and vascular endothelial cells in the CSH outer membrane is implicated in the pathogenesis of CSH expansion.
• VEGF is a key molecular factor contributing to the growth of chronic subdural hematomas.