title: Expression of Rb2/p130 protein correlates with the degree of malignancy in gliomas.
abstract: It has been reported that there is an inverse correlation between the immunohistochemical expression of Rb2/p130, a member of the retinoblastoma gene family, and the degree of malignancy in at least some histological types. In order to investigate the expression of this protein in gliomas, we evaluated 58 samples from patients with resected gliomas. We focused on the relationship between the degree of malignancy of the glioma and the immunohistochemical detection of Rb2/p130. Expression of Rb2/p130 was observed in 38 glioma specimens (65.5%), including a high expression level in low-grade glioma specimens (> 30% positive cells in 84% of tumors) and a low expression level in high-grade glioma specimens (> 30% positive cells in 12% of tumors). The most aggressive of the gliomas exhibited very low to undetectable levels of Rb2/p130. Moreover, we observed an inverse correlation between Rb2/p130 expression and the degree of malignancy. These findings suggest that the differentiation of gliomas might be partially mediated by the Rb2/p130 gene, and that Rb2/ p130 expression can additionally be an indicator of a better prognosis in patients with gliomas.
authors.affiliation: Department of Neurosurgery, Kansai Medical University, Moriguchi, Osaka, Japan.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Li
authors.forename: Yasuo
authors.initials: Y
authors.lastname: Sakurai
authors.forename: Takashi
authors.initials: T
authors.lastname: Ryu
authors.forename: Keiichi
authors.initials: K
authors.lastname: Azuma
authors.forename: Kunikazu
authors.initials: K
authors.lastname: Yoshimura
authors.forename: Yasuo
authors.initials: Y
authors.lastname: Yamanouchi
authors.forename: Susumu
authors.initials: S
authors.lastname: Ikehara
authors.forename: Keiji
authors.initials: K
authors.lastname: Kawamoto
mesh_terms: D000328:Adult; D000368:Aged; D014408:Biomarkers, Tumor / Q000032:analysis*; D001932:Brain Neoplasms / Q000378:metabolism* / Q000473:pathology*; D005260:Female; D005910:Glioma / Q000378:metabolism* / Q000473:pathology*; D006801:Humans; D007150:Immunohistochemistry; D008297:Male; D008875:Middle Aged; D011506:Proteins / Q000378:metabolism*; D050717:Retinoblastoma-Like Protein p130
chemical_list: D014408:Biomarkers, Tumor; D011506:Proteins; C493837:RBL2 protein, human; D050717:Retinoblastoma-Like Protein p130