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M6A RNA methylation modification and tumor immune microenvironment in lung adenocarcinoma

Biophysics Reports 2023年第3期9卷 146-158页

作者： Shujuan Li Qianzhong Li Luqiang Zhang Yechen Qi Hui Bai Laboratory of Theoretical Biophysics School of Physical Science and Technology Inner Mongolia University The State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock Inner Mongolia University

Lung adenocarcinoma is one of the deadliest tumors. Studies have shown that N6-methyladenosine RNA methylation regulators, as a dynamic chemical modification, affect the occurrence and development of lung adenocarcinoma. To investigate the relationship between mutations and expression levels of m6A regulators in lung adenocarcinoma, we investigated the mutations and expression levels of38 m6A regulators. We found that mutations in m6A regulatory factors did not affect the changes in expression levels, and 19 differentially expressed genes were identified. All tumor samples were classified into two subtypes based on the expression levels of 19 differentially expressed m6A-regulated genes. Survival analysis showed significant differences in survival between the two subtypes. To explore the relationship between immune cell infiltration and survival in both subtypes, we calculated the infiltration of 23 immune cells in both subtypes, and we found that the subtype with high immune cell infiltration had better survival. We found that subtypes with low tumor purity and high stromal and immune scores had better survival. The m6A-related immune genes were identified by taking the intersection of differentially expressed genes and immune genes in the two isoforms and calculating the Pearson correlation coefficients between the intersecting immune genes and the differentially expressed m6A-regulated genes. Finally, a prognostic model associated with m6A and associated with immunity was developed using prognostic genes screened from m6A-associated immune genes. The predictive power of the model was evaluated and our model was able to achieve good prediction.

关键词： Lung adenocarcinoma M6A RNA methylation regulators Consensus clustering immune cell infiltrates Tumor immune microenvironment

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