Abstract
Background
Lower-grade gliomas (LGGs) show highly metabolic heterogeneity and adaptability. To develop effective therapeutic strategies targeting metabolic processes, it is necessary to identify metabolic differences and define metabolic subtypes. Here, we aimed to develop a classification system based on metabolic gene expression profile in LGGs.
Methods
The metabolic gene profile of 402 diffuse LGGs from the Cancer Genome Atlas (TCGA) was used for consensus clustering to determine robust clusters of patients, and the reproducibility of the classification system was evaluated in three Chinese Glioma Genome Atlas (CGGA) cohorts. Then, the metadata set for clinical characteristics, immune infiltration, metabolic signatures and somatic alterations was integrated to characterise the features of each subtype.
Results
We successfully identified and validated three highly distinct metabolic subtypes in LGGs. M2 subtype with upregulated carbohydrate, nucleotide and vitamin metabolism correlated with worse prognosis, whereas M1 subtype with upregulated lipid metabolism and immune infiltration showed better outcome. M3 subtype was associated with low metabolic activities and displayed good prognosis. Three metabolic subtypes correlated with diverse somatic alterations. Finally, we developed and validated a metabolic signature with better performance of prognosis prediction.
Conclusions
Our study provides a new classification based on metabolic gene profile and highlights the metabolic heterogeneity within LGGs.
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Acknowledgements
The authors conducting this work represent the Chinese Glioma Cooperative Group (CGCG).
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W.Z., Z.Z. and W.M.: conceptualisation and supervision; F.W., Y.L. and G.L.: methodology, data curation and writing—original draft preparation; Y.Z. and Y.F.: data collection, software and writing—reviewing and editing.
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This study was carried out in accordance with the Helsinki declaration and approved by the ethics committee of Tiantan hospital, and patient informed consents existed in these two public databases.
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Data availability
All data in this study are available in TCGA, GLASS, GEO and CGGA datasets.
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The authors declare no competing interests.
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This work was supported by National Natural Science Foundation of China (81672479, 82002994, 82002647 and 81702460) and Natural Science Foundation of Anhui Province (1908085QH335).
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Wu, F., Liu, YW., Li, GZ. et al. Metabolic expression profiling stratifies diffuse lower-grade glioma into three distinct tumour subtypes. Br J Cancer 125, 255–264 (2021). https://doi.org/10.1038/s41416-021-01418-6
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DOI: https://doi.org/10.1038/s41416-021-01418-6
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