title: Prognostic significance of microvessel density determined by an anti-CD105/endoglin monoclonal antibody in astrocytic tumors: comparison with an anti-CD31 monoclonal antibody.
abstract: There are conflicting reports as to whether the degree of angiogenesis as measured by microvessel density (MVD) has a prognostic value in astrocytic tumors. This may be due to the use of different antibodies against endothelial cells to highlight microvessels. It has been reported that unlike pan-endothelial antibodies, such as CD31, anti-CD105 antibodies preferentially react with endothelial cells in angiogenic tissues. To clarify the validity of anti-CD105 antibody in the evaluation of angiogenesis, we assessed MVD using an anti-CD105 monoclonal antibody (mAb) (CD105-MVD) and an anti-CD31 mAb (CD31-MVD) in a series of 50 astrocytic tumors, and correlated MVD with expression of the key angiogenic factor vascular endothelial growth factor (VEGF) and prognosis. The mean CD31-MVD and CD105-MVD was 36.7 and 24.8 for low-grade astrocytoma (LGA), 48.0 and 42.7 for anaplastic astrocytoma, 55.3 and 51.9 for glioblastoma multiforme (GBM), respectively. CD105-MVD was more closely correlated with VEGF expression than CD31-MVD. Patients with LGA and GBM showing higher CD105-MVD had a significantly shorter mean survival time (MST) than those with lower CD105-MVD tumors (P = 0.0381 and 0.0131, respectively). Whereas the MST of patients with higher CD31-MVD tumors seemed to be shorter than that of lower CD31-MVD patients within each tumor grade, the differences were not statistically significant. These findings suggest that anti-CD105 mAb may be a better marker than anti-CD31 mAb in evaluation of angiogenesis and prediction of prognosis in astrocytic tumors.
authors.affiliation: Department of Neurosurgery, Faculty of Medical Sciences, University of Fukui, Fukui, Japan. yonyao@iupui.edu
authors.forename: Yongxue
authors.initials: Y
authors.lastname: Yao
authors.forename: Toshihiko
authors.initials: T
authors.lastname: Kubota
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Takeuchi
authors.forename: Kazufumi
authors.initials: K
authors.lastname: Sato
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000911:Antibodies, Monoclonal; D015703:Antigens, CD; D001254:Astrocytoma / Q000098:blood supply* / Q000401:mortality / Q000473:pathology; D014408:Biomarkers, Tumor / Q000032:analysis*; D001932:Brain Neoplasms / Q000098:blood supply / Q000401:mortality* / Q000473:pathology; D000071063:Endoglin; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D008297:Male; D008875:Middle Aged; D009389:Neovascularization, Pathologic / Q000378:metabolism*; D019408:Platelet Endothelial Cell Adhesion Molecule-1 / Q000096:biosynthesis / Q000276:immunology; D011379:Prognosis; D011956:Receptors, Cell Surface; D016019:Survival Analysis; D015996:Survival Rate; D019010:Vascular Cell Adhesion Molecule-1 / Q000096:biosynthesis / Q000276:immunology; D042461:Vascular Endothelial Growth Factor A / Q000096:biosynthesis
chemical_list: D000911:Antibodies, Monoclonal; D015703:Antigens, CD; D014408:Biomarkers, Tumor; C064206:ENG protein, human; D000071063:Endoglin; D019408:Platelet Endothelial Cell Adhesion Molecule-1; D011956:Receptors, Cell Surface; D019010:Vascular Cell Adhesion Molecule-1; D042461:Vascular Endothelial Growth Factor A