title: Comparison of cell adhesion molecule expression between glioblastoma multiforme and autologous normal brain tissue.
abstract: We investigated glioblastoma multiforme (GBM) for a pattern of consistent alterations in cell adhesion molecules (CAM) expression that might distinguish tumor from normal autologous brain tissue. We used frozen section immunohistochemistry with anti-CAM and computerized image analysis to quantify staining intensity which we expressed as relative intensity units (RIU). Our results showed that normal brain tissue generally did not express alpha 1 beta 1, intercellular CAM-1 (ICAM-1), and sialylated Lewisx, slightly expressed alpha 2, alpha 4, alpha 5, alpha 6 beta 1, alpha v beta 3, lymphocyte function-associated antigen-3 (LFA-3), Lewisx, sialylated LewisLewisx, had a good expression of alpha 3 beta 1 and CD44, and strongly expressed neural CAM (NCAM). GBM expressed alpha 2, alpha 3, alpha 5, alpha 6 beta 1, alpha v beta 3, ICAM-1, LFA-3, CD44, Lewisx, sialylated Lewisx, and sialylated LewisLewisx significantly higher (2-11-fold RIU) than normal brain tissue. ICAM-1 and LFA-3 were the most distinctive markers of GBM. The small blood vessel endothelial cells of the normal brain and the GBM showed a few differences. The tumor endothelium expression of alpha 2 beta 1, alpha 4 beta 1, and LFA-3 RIU appeared twice higher than in normal endothelium and alpha 6 beta 1 showed an average of 40% RIU decrease in comparison to normal. These results show that the expression of several CAM is consistently altered in GBM and its microvasculature when compared with autologous normal brain tissue.
authors.affiliation: Department of Neurosurgery, University of Texas, M.D. Anderson Cancer Center, Houston 77030, USA.
authors.forename: M C
authors.initials: MC
authors.lastname: Gingras
authors.forename: E
authors.initials: E
authors.lastname: Roussel
authors.forename: J M
authors.initials: JM
authors.lastname: Bruner
authors.forename: C D
authors.initials: CD
authors.lastname: Branch
authors.forename: R P
authors.initials: RP
authors.lastname: Moser
mesh_terms: D015703:Antigens, CD / Q000032:analysis; D015295:Antigens, Tumor-Associated, Carbohydrate / Q000032:analysis; D001923:Brain Chemistry; D001932:Brain Neoplasms / Q000737:chemistry*; D018968:CD58 Antigens; D002352:Carrier Proteins / Q000032:analysis; D015815:Cell Adhesion Molecules / Q000032:analysis*; D004730:Endothelium, Vascular / Q000737:chemistry; D005909:Glioblastoma / Q000737:chemistry*; D006801:Humans; D018960:Hyaluronan Receptors; D007150:Immunohistochemistry; D016023:Integrins / Q000032:analysis; D018799:Intercellular Adhesion Molecule-1 / Q000032:analysis; D008562:Membrane Glycoproteins / Q000032:analysis; D011956:Receptors, Cell Surface / Q000032:analysis; D016201:Receptors, Lymphocyte Homing / Q000032:analysis
chemical_list: D015703:Antigens, CD; D015295:Antigens, Tumor-Associated, Carbohydrate; D018968:CD58 Antigens; D002352:Carrier Proteins; D015815:Cell Adhesion Molecules; D018960:Hyaluronan Receptors; D016023:Integrins; D008562:Membrane Glycoproteins; D011956:Receptors, Cell Surface; D016201:Receptors, Lymphocyte Homing; D018799:Intercellular Adhesion Molecule-1