Expression of isocitrate dehydrogenase 1 gene R132H and its diagnostic application in glioma.
- Author:
Yue-shan PIAO
1
;
De-hong LU
;
Xiao-juan ZHANG
;
Guo-cai TANG
;
Hong YANG
Author Information
- Publication Type:Journal Article
- MeSH: Adolescent; Adult; Aged; Astrocytoma; metabolism; pathology; Brain Neoplasms; metabolism; pathology; Child; Diagnosis, Differential; Female; Glioma; metabolism; pathology; Gliosis; metabolism; pathology; Humans; Isocitrate Dehydrogenase; genetics; metabolism; Male; Middle Aged; Mutation; Tumor Suppressor Protein p53; metabolism; Young Adult
- From: Chinese Journal of Pathology 2011;40(3):156-160
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVETo investigate the immunohistochemical expression of isocitrate dehydrogenase 1 gene (IDH1) R132H in glioma and its diagnostic utility.
METHODSImmunohistochemical study of IDH1R132H expression was performed on formalin-fixed paraffin-embedded tissue samples of 75 gliomas, including 33 cases of grade II, 20 cases of grade III and 22 cases of grade IV tumors. Six cases of pilocytic astrocytoma and 12 cases of gliosis were used as controls.
RESULTSNineteen in 33 cases of grade II (57.6%), 8 in 20 cases of grade III (40.0%), 6 in 22 cases of grade IV (27.3%) showed positive cytoplasmic staining of IDH1R132H. Scattered invasive glioma cells at the tumor periphery also expressed IDH1R132H. Gliomas involving the frontal lobe showed more strong IDH1R132H staining. In contrast, none of the pilocytic astrocytomas and gliosis showed IDH1R132H staining. Moreover, the rate of p53 immunopositivities were 42.4% (14/33) in grade II, 65.0% (13/20) in grade III and 77.3% (17/22) in grade IV gliomas. There were no statistic correlations between expression of IDH1R132H and p53.
CONCLUSIONIDH1R132H tends to express preferentially in low-grade gliomas, and it thus may serve as a valuable marker in distinguishing low grade gliomas from gliosis.
