Epidermal growth factor receptor expression in 72 meningiomas.
The expression of epidermal growth factor receptor (EGF-R) was studied immunohistochemically in 72 meningiomas using two monoclonal antibodies with specificities to protein and carbohydrate components, respectively, of the external domain of the EGF-R. One third of the tumors had cytoplasmic and membrane positivity with the protein-specific antibody but in none were there positive tumor cells with the carbohydrate-specific antibody which recognizes the blood group A antigen. There was no difference in EGF-R expression between typical and aggressive meningiomas. No evidence was found to support previous reports of specific EGF-R immunoreactivity in the vascular endothelial cells of meningiomas. The authors believe this discrepancy to be due to detection of normal blood group A antigen attached to endothelial cells in patients of blood group A or AB. This occurs because many monoclonal anti-EGF-R antibodies are specific for A antigen which is found on the EGF-R of A431 cells but has not been reported on EGF-R elsewhere.
Jones
N R
NR
Department of Neuropathology, Radcliffe Infirmary, Oxford, England.
Rossi
M L
ML
Gregoriou
M
M
Hughes
J T
JT
D000818:Animals; D000911:Antibodies, Monoclonal; D066246:ErbB Receptors / Q000502:physiology*; D006736:Horses; D006801:Humans; D007150:Immunohistochemistry; D008577:Meningeal Neoplasms / Q000378:metabolism / Q000648:ultrastructure*; D008579:Meningioma / Q000378:metabolism / Q000648:ultrastructure*; D051379:Mice
D000911:Antibodies, Monoclonal; D066246:ErbB Receptors