title: Vascular permeability factor/vascular endothelial growth factor in nasal polyps.
abstract: Although the aetiology of polyps is still, for the most part, unknown, the disease is known to involve tissue oedema. Vascular permeability/vascular endothelial growth factor (VPF/VEGF) is a major inducer of angiogenesis and capillary permeability. This study investigated VPF/VEGF expression in biopsies of nasal polyps from 39 patients and in healthy nasal mucosa from 10 patients by immunohistochemical staining. Staining for VPF/VEGF in the mucosal surface and in the glandular epithelium of nasal polyps was weaker than in normal controls. In two patients, strong staining for VPF/VEGF was found in a granular pattern in mast cells, while the mast cells in other polyposis patients appeared to be largely degranulated. VPF/VEGF was not seen in the mast cells of control patients. Although expression of VPF/VEGF was not increased in the epithelium of the nasal polyps, VPF/VEGF secreted from mast cells may take part in nasal polyp formation.
authors.affiliation: Department of Otorhinolaryngology, Helsinki University Central Hospital, Finland. doctor.vento@fimnet.fi
authors.forename: S I
authors.initials: SI
authors.lastname: Vento
authors.forename: C H
authors.initials: CH
authors.lastname: Wolff
authors.forename: P J
authors.initials: PJ
authors.lastname: Salven
authors.forename: M L
authors.initials: ML
authors.lastname: Hytönen
authors.forename: L O
authors.initials: LO
authors.lastname: Ertama
authors.forename: C H
authors.initials: CH
authors.lastname: Malmberg
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000911:Antibodies, Monoclonal / Q000276:immunology; D002199:Capillary Permeability / Q000502:physiology; D016228:Endothelial Growth Factors / Q000378:metabolism*; D004730:Endothelium, Vascular / Q000378:metabolism* / Q000473:pathology*; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D008222:Lymphokines / Q000378:metabolism*; D008297:Male; D008407:Mast Cells / Q000378:metabolism; D008875:Middle Aged; D009298:Nasal Polyps / Q000276:immunology / Q000378:metabolism* / Q000473:pathology*; D015291:Transforming Growth Factors / Q000378:metabolism; D042461:Vascular Endothelial Growth Factor A; D042442:Vascular Endothelial Growth Factors
chemical_list: D000911:Antibodies, Monoclonal; D016228:Endothelial Growth Factors; D008222:Lymphokines; D042461:Vascular Endothelial Growth Factor A; D042442:Vascular Endothelial Growth Factors; D015291:Transforming Growth Factors