Value of MORC2-IDH1 detection in molecular subtyping of glioblastoma patients treated with postoperative chemoradiotherapy
10.3760/cma.j.issn.1004-4221.2019.06.001
- VernacularTitle:联合MORC2-IDH1检测对胶质母细胞瘤放化疗患者分子分型价值
- Author:
Meng TANG
1
;
Hui XU
;
You WANG
;
Qianshan DING
;
Fuxiang ZHOU
Author Information
1. 武汉大学中南医院肿瘤放化疗科/湖北省肿瘤医学临床研究中心/肿瘤生物学行为湖北省重点实验室 430071
- Keywords:
MORC2 gene;
Glioblastoma/chemoradiotherapy;
Prognosis;
Molecular subtype
- From:
Chinese Journal of Radiation Oncology
2019;28(6):401-404
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the expression of microrchidia 2(MORC2) in glioblastoma patients and to evaluate its prognostic value of MORC2 expression combined with IDH1 mutation status for chemoradiotherapy efficacy and new molecular subtype.Methods The expression level of MORC2 in 45 glioblastoma tissues was measured by immunohistochemical staining and its correlation with clinicopathological characteristics and clinical prognosis after chemoradiotherapy was analyzed.Further more,the prognostic values of the expression of MORC2 combined with the status of IDH1 were assessed in a glioblastoma CGGA mRNA dataset.Results High expression of MORC2 was observed in 76％ of glioblastoma patients,which was negatively correlated with overall survival (HR=2.928,95％CI:1.582-5.418,P=0.002;recurrence-free survival (HR=2.204,95％CI:1.186-4.095,P=0.022).Moreover,according to the prognosis value of MORC2 expression and IDH1 mutation status,glioblastoma patients were divided into 3 molecular subtypes.Patients with the subtype of IDH1mt/MORC2low obtained the best clinical prognosis with a median survival of 22 months (95％CI:13.98-30.02),whereas those with the subtype of IDH1wt/MORC2high obtained the worst clinical prognosis with a median survival of 5.63 months (95％CI:3.92-7.34,HR=4.15,95％CI:3.92-7.34,P=0.002).Among IDH1wt glioblastoma patients,MORC2high patients had worse clinical prognosis compared with MORC2low counterparts,prompting that IDH1wt/ MORC2high glioblastoma tissues yielded higher capability of DNA injury repairing and resistance to chemoradiotherapy.Conclusions The high expression of MORC2 can be used as a potential indicator of poor prognosis of glioblastoma patients after chemoradiotherapy.IDH 1 mutation status combined with MORC2 expression can establish a novel molecular subtyping,which provide evidence for stratified therapy for glioblastoma patients.
