Phospholipase Cγ1 (PLCG1) overexpression is associated with tumor growth and poor survival in IDH wild-type lower-grade gliomas in adult patients

被引：23

作者：

Li, Tianwen ^{[1
,2
,3
]}

Yang, Zhipeng ^{[2
,4
]}

Li, Haoyuan ^{[1
,2
]}

Zhu, Jingjing ^{[2
,5
]}

Wang, Ye ^{[2
,3
]}

Tang, Qisheng ^{[2
,3
]}

Shi, Zhifeng ^{[1
,2
,3
,6
]}

机构：

[1] Fudan Univ, Huashan Hosp, Dept Neurosurg, Shanghai, Peoples R China

[2] Natl Ctr Neurol Disorders, Shanghai, Peoples R China

[3] Fudan Univ, Inst Neurosurg, Shanghai, Peoples R China

[4] Fudan Univ, Inst Engn, Shanghai, Peoples R China

[5] Fudan Univ, Huashan Hosp, Dept Pathol, Shanghai, Peoples R China

[6] Shanghai Key Lab Neural Regenerat & Brain Funct R, Shanghai, Peoples R China

来源：

LABORATORY INVESTIGATION | 2022年 / 102卷 / 02期

关键词：

CENTRAL-NERVOUS-SYSTEM; C-GAMMA; MUTATION; CLASSIFICATION; PROGRESSION; ACTIVATION; EXPRESSION;

D O I：

10.1038/s41374-021-00682-7

中图分类号：

R-3 [医学研究方法]; R3 [基础医学];

学科分类号：

1001 ;

摘要：

Gliomas are the most common and recalcitrant intracranial tumors, approximately a quarter of which are classified as lower-grade gliomas (WHO II-III). Although the prognosis of lower-grade gliomas (LGGs) is significantly better than that of higher-grade gliomas, as a highly heterogeneous tumor type, the prognosis of LGGs varies greatly based on the molecular diagnosis. IDH wild-type used to be regarded as a dismal prognostic biomarker in LGGs; however, several studies revealed that IDH wild-type LGGs might not always be equivalent to glioblastoma (WHO IV). Hence, we hypothesize that underlying biological events in LGGs can result in different prognosis. In our study, transcriptome profiling was performed in 24 samples of LGG, and the results showed that the expression of phospholipase C gamma 1 (PLCG1) was significantly correlated with IDH1/2 status and patients' clinical outcome. Furthermore, the cancer genome atlas (TCGA) and the Chinese glioma genome atlas (CGGA) databases verified that elevated PLCG1 expression was associated with tumor progression and poor survival in LGG patients. Moreover, PLCG1-targeted siRNA dramatically affected the growth, migration and invasiveness of IDH wild-type LGG cell lines. In in vitro and in vivo experiments, the PLC-targeted drug significantly suppressed the tumor growth of IDH wild-type LGG cell lines in vitro and tumors in mouse models. Taken together, our results demonstrated that higher PLCG1 expression was associated with tumor growth and worse prognosis in IDH wild-type LGGs and PLCG1 could serve as a potential therapeutic target for IDH wild-type LGG patients. The mRNA expression levels of phospholipase C gamma 1 (PLCG1) are much higher in IDH wild-type (IDHwt) lower-grade gliomas (LGGs) than in that of IDH mutant (IDHmut) LGGs. Higher PLCG1expression in IDHwt LGGs indicates poor clinical outcome. PLCG1 amplification may act as the key mechanism of PLCG1 upregulation. Depletion of PLCG1 expression can inhibits proliferation and invasion of IDHwt LGG cell lines in vitro and in vivo. The PLC inhibitor U73122 may therefore be a potential therapeutical agent for IDHwt LGGs.

引用

页码：143 / 153

页数：11

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