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ArticleCurrent medicinal chemistry2025

Precise Molecular Subtyping Reveals Heterogeneity of Lung Adenocarcinoma Based on DNA Methylation.

Jiaxin Shi, Mengyan Zhang, Mu Su, Bo Peng, Ran Xu, Chenghao Wang, Xiang Zhou, Yan Zhang, Linyou Zhang

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Article in Current medicinal chemistry, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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Jiaxin ShiDepartment of Thoracic Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, China.
Mengyan ZhangSchool of Life Science and Technology, Computational Biology Research Center, Harbin Institute of Technology, Harbin, 150001, China.
Mu SuSchool of Life Science and Technology, Computational Biology Research Center, Harbin Institute of Technology, Harbin, 150001, China.
Bo PengDepartment of Thoracic Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, China.
Ran XuDepartment of Thoracic Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, China.
Chenghao WangDepartment of Thoracic Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, China.
Xiang ZhouDepartment of Thoracic Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, China.
Yan ZhangSchool of Life Science and Technology, Computational Biology Research Center, Harbin Institute of Technology, Harbin, 150001, China.
Linyou ZhangDepartment of Thoracic Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, China.

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6 · The paper itself

Abstract

backgroundDue to the high heterogeneity of lung adenocarcinoma (LUAD), which restricts the effectiveness of therapy, precise molecular subgrouping of LUAD is of great significance. Clinical research has demonstrated the significant potential of DNA methylation as a classification indicator for human malignancies.

methodsWGML framework (which was developed based on weighted gene correlation network analysis (WGCNA), Gene Ontology (GO), and machine learning) was developed to precisely subgroup molecular subtypes of LUAD. This framework included two parts: the WG algorithm and the machine learning part. The WG algorithm part was an original algorithm used to obtain a crucial module, which was characterized by weighted correlation network analysis, functional annotation, and mathematical algorithms. The machine learning part utilized the Boruta algorithm, random forest algorithm, and Gradient Boosting Regression Tree algorithm to select feature genes. Then, based on the results of the WGML framework, subtypes were computed by the hierarchical clustering algorithm. A series of analyses, including dimensionality reduction methods, survival analysis, clinical stage analysis, immune infiltration analysis, tumor environment analysis, immune checkpoints analysis, TIDE analysis, CYT analysis, somatic mutation analysis, and drug sensitivity analysis, were utilized to demonstrate the effectiveness of subgrouping. GEO datasets were used to externally validate the results. Meanwhile, another subgrouping method of LUAD from another study was employed to compare with the WGML framework.

resultsBy importing DNA methylation data into the WGML framework, nine genes were obtained to further subgroup LUAD. Three subtypes, the Carcinogenesis subtype, Immune-infiltration subtype, and Chemoresistance subtype, were identified. The dimensionality reduction method exhibited great distinctness between subtypes. A series of analyses were employed to exhibit the difference among the three subtypes and to demonstrate the accuracy of the definition of subtypes. Besides, the WGML framework was compared with a LUAD subgrouping method from another research, which demonstrated that WGML had better efficiency for subgrouping LUAD.

conclusionThis study provides a novel LUAD subgrouping framework named WGML for the accurate subgrouping of lung adenocarcinoma.

Indexed as

Adenocarcinoma of LungDNA MethylationLung NeoplasmsAlgorithmsHumansMachine LearningDNA methylationimmune heterogeneityLung adenocarcinomaoriginal algorithmsubtypingWG algorithm.

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