title: Invasive meningioma is associated with a low expression of E-cadherin and beta-catenin.
abstract: Invasive meningioma shows benign histological features (WHO grade 1) and the brain expansion at the tumor-brain interface, and recurs more frequently than common meningiomas. To determine the mechanism of brain expansion, we studied the relationship between invasive meningioma and cell adhesion molecules. Immunostaining for E-cadherin (E-CH), N-cadherin (N-CH), beta-catenin, and Ki-67 was performed in 103 meningiomas that consisted of 61 meningothelial meningiomas, 25 fibrous meningiomas, 12 invasive meningiomas and 5 anaplastic meningiomas. All tumors were negative for N-CH. All the 61 meningothelial meningiomas, 10 of 12 invasive meningiomas, and 3 of 5 anaplastic meningiomas were positive for both E-CH and beta-catenin, while these were both negative in all of the fibrous meningiomas. In invasive meningiomas, the expansive part of the tumor showed a lower rate (4/12 tumors) of E-CH and beta-catenin positivity, while the central part showed a higher rate (10/12 tumors). The Ki-67 labeling index was higher in invasive and anaplastic meningiomas than in meningothelial meningiomas. These results suggest that a reduction in cell adhesion molecules and increased proliferative activity may be related, which may lead to a better understanding of the mechanism of meningioma expansion in the future.
authors.affiliation: Department of Neurosurgery, Kitasato University School of Medicine, Sagamihara, Kanagawa, Japan. utsuki@med.kitasato-u.ac.jp
authors.forename: S
authors.initials: S
authors.lastname: Utsuki
authors.forename: H
authors.initials: H
authors.lastname: Oka
authors.forename: Y
authors.initials: Y
authors.lastname: Sato
authors.forename: N
authors.initials: N
authors.lastname: Kawano
authors.forename: B
authors.initials: B
authors.lastname: Tsuchiya
authors.forename: I
authors.initials: I
authors.lastname: Kobayashi
authors.forename: K
authors.initials: K
authors.lastname: Fujii
mesh_terms: D015820:Cadherins / Q000378:metabolism*; D003598:Cytoskeletal Proteins / Q000378:metabolism*; D006801:Humans; D007158:Immunologic Techniques; D019394:Ki-67 Antigen / Q000378:metabolism; D008577:Meningeal Neoplasms / Q000378:metabolism* / Q000473:pathology*; D008579:Meningioma / Q000378:metabolism* / Q000473:pathology*; D009361:Neoplasm Invasiveness; D013194:Staining and Labeling; D015534:Trans-Activators / Q000378:metabolism*; D051176:beta Catenin
chemical_list: C495270:CTNNB1 protein, human; D015820:Cadherins; D003598:Cytoskeletal Proteins; D019394:Ki-67 Antigen; D015534:Trans-Activators; D051176:beta Catenin