Characterizing invading glioma cells based on IDH1-R132H and Ki-67 immunofluorescence

Glioma, the most common primary brain tumor, is characterized by proliferative-invasive growth. However, the detailed biological characteristics of invading glioma cells remain to be elucidated. A monoclonal antibody (clone HMab-1) that specifically and sensitively recognizes the isocitrate dehydrog...

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Bibliographic Details
Published in:Brain tumor pathology 2014-10, Vol.31 (4), p.242-246
Main Authors: Sabit, Hemragul, Nakada, Mitsutoshi, Furuta, Takuya, Watanabe, Takuya, Hayashi, Yutaka, Sato, Hiroshi, Kato, Yukinari, Hamada, Jun-ichiro
Format: Article
Language:English
Subjects:
Adult
Brain cancer
Brain Neoplasms - genetics
Brain Neoplasms - pathology
Cancer Research
Cell Transformation, Neoplastic - genetics
Cloning
Female
Fluorescent Antibody Technique
Glioma
Glioma - genetics
Glioma - pathology
Humans
Isocitrate Dehydrogenase - analysis
Isocitrate Dehydrogenase - genetics
Ki-67 Antigen - analysis
Male
Medicine
Medicine & Public Health
Middle Aged
Monoclonal antibodies
Mutation
Neoplasm Invasiveness
Neoplasm Staging
Neurology
Neurosurgery
Oncology
Original Article
Pathology
Young Adult
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Summary:Glioma, the most common primary brain tumor, is characterized by proliferative-invasive growth. However, the detailed biological characteristics of invading glioma cells remain to be elucidated. A monoclonal antibody (clone HMab-1) that specifically and sensitively recognizes the isocitrate dehydrogenase-1 (IDH1) protein carrying the R132H mutation can identify invading glioma cells by immunostaining. To investigate the degree of invasion in gliomas of distinct grades and the proliferative capacity of the invading cells, immunofluorescent staining was conducted using antibodies against IDH1-R132H and Ki-67 on 11 surgical and autopsy specimens of the tumor core and the invading area. Higher numbers of IDH1-R132H-positive cells in the invading area correlated with a higher tumor grade. Double staining for IDH1-R132H and Ki-67 demonstrated that most invading cells that expressed IDH1-R132H were not stained by the Ki-67 antibody, and the ratio of Ki-67-positive cells among IDH1-R132H-positive cells was significantly lower in the invasion area than in the tumor core in all grades of glioma. These data suggest that higher grade gliomas have a greater invasive potential and that invading cells possess low proliferative capacity.
ISSN:1433-7398
1861-387X
DOI:10.1007/s10014-013-0172-y