A Novel Four-Gene Signature Associated With Immune Checkpoint for Predicting Prognosis in Lower-Grade Glioma

Frontiers in Oncology

Chunyan Hao¹  Xiaolin Zhu²  Xin Yang²  Jiaqi Hao²  Zhuangzhuang Wang²  Yu Zhang²  Youchao Xiao²  Huan Wang²  Xingguang Ren³  Hubin Duan⁴  Gang Cui⁵ 

[1] Department of Geriatrics, First Hospital of Shanxi Medical University, Taiyuan, China;Department of Neurosurgery, First Hospital of Shanxi Medical University, Taiyuan, China;Department of Neurosurgery, General Hospital of TISCO, Taiyuan, China;Department of Neurosurgery, Lvliang People’s Hospital, Lvliang, China;Department of Neurosurgery, The Third Affiliated Hospital of Shandong First Medical University (Affiliated Hospital of Shandong Academy of Medical Sciences), Jinan, China;

关键词: gene signature;    prognostic value;    biomarker;    immune checkpoint;    cancer stem cell;    isocitrate dehydrogenase mutation;   

DOI  :  10.3389/fonc.2020.605737

来源: DOAJ

【 摘 要 】

The overall survival of patients with lower grade glioma (LGG) varies greatly, but the current histopathological classification has limitations in predicting patients’ prognosis. Therefore, this study aims to find potential therapeutic target genes and establish a gene signature for predicting the prognosis of LGG. CD44 is a marker of tumor stem cells and has prognostic value in various tumors, but its role in LGG is unclear. By analyzing three glioma datasets from Gene Expression Omnibus (GEO) database, CD44 was upregulated in LGG. We screened 10 CD44-related genes via protein–protein interaction (PPI) network; function enrichment analysis demonstrated that these genes were associated with biological processes and signaling pathways of the tumor; survival analysis showed that four genes (CD44, HYAL2, SPP1, MMP2) were associated with the overall survival (OS) and disease-free survival (DFS)of LGG; a novel four-gene signature was constructed. The prediction model showed good predictive value over 2-, 5-, 8-, and 10-year survival probability in both the development and validation sets. The risk score effectively divided patients into high- and low- risk groups with a distinct outcome. Multivariate analysis confirmed that the risk score and status of IDH were independent prognostic predictors of LGG. Among three LGG subgroups based on the presence of molecular parameters, IDH-mutant gliomas have a favorable OS, especially if combined with 1p/19q codeletion, which further confirmed the distinct biological pattern between three LGG subgroups, and the gene signature is able to divide LGG patients with the same IDH status into high- and low- risk groups. The high-risk group possessed a higher expression of immune checkpoints and was related to the activation of immunosuppressive pathways. Finally, this study provided a convenient tool for predicting patient survival. In summary, the four prognostic genes may be therapeutic targets and prognostic predictors for LGG; this four-gene signature has good prognostic prediction ability and can effectively distinguish high- and low-risk patients. High-risk patients are associated with higher immune checkpoint expression and activation of the immunosuppressive pathway, providing help for screening immunotherapy-sensitive patients.

【 授权许可】

Unknown