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ICAM1 mRNA Functions Independently of Protein Coding to Inhibit Translation via a dsRNA-ILF2/ILF3 Pathway in Lung Cancer

ABSTRACT: This study investigates the role of Intercellular Adhesion Molecule 1 (ICAM1) in lung cancer using RNA-seq and CUT&Tag sequencing. We performed ICAM1 knockout and knockout&knockdown experiments in CALU-1 lung cancer cells to examine changes in gene expression and chromatin accessibility. Our findings provide insights into ICAM1's regulatory mechanisms and its potential as a therapeutic target in lung cancer.

ORGANISM(S): Homo sapiens

PROVIDER: GSE277238 | GEO | 2025/12/29

REPOSITORIES: GEO

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Project description:Esophageal cancer (EC) is a common malignant disease in eastern countries. However, a study of the metabolomic characteristics associated with other biological factors in esophageal squamous cell carcinoma (ESCC) is limited. Interleukin enhancer binding factor 2 (ILF2) and ILF3, double-stranded RNA-binding proteins, have been reported to contribute to the occurrence and development of various types of malignancy. Nevertheless, the underlying functions of ILF2 and ILF3 in ESCC metabolic reprogramming have never been reported. This study aimed to contribute to the metabolic characterization of ESCC and to investigate the metabolomic alterations associated with ILF2 and ILF3 in ESCC tissues. Here, we identified 112 differential metabolites, which were mainly enriched in phosphatidylcholine biosynthesis, fatty acid metabolism, and amino acid metabolism pathways, based on liquid chromatography-mass spectrometry and capillary electrophoresis-mass spectrometry approaches using ESCC tissues and paired para-cancer tissues from twenty-eight ESCC patients. In addition, ILF2 and ILF3 expression were significantly elevated in EC tissues compared to the histologically normal samples, and closely associated with PI3K/AKT and MAPK signaling pathways in ESCC. Moreover, in ESCC tissues with a high ILF2 expression, several short-chain acyl-carnitines (C3:0, C4:0, and C5:0) related to the BCAA metabolic pathway and long-chain acyl-carnitines (C14:0, C16:0, C16:0-OH, and C18:0) involved in the oxidation of fatty acids were obviously upregulated. Additionally, a series of intermediate metabolites involved in the glycolysis pathway, including G6P/F6P, F1,6BP, DHAP, G3P, and 2,3BPG, were remarkably downregulated in highly ILF3-expressed ESCC tissues compared with the corresponding para-cancer tissues. Overall, these findings may provide evidence for the roles of ILF2 and ILF3 during the process of ESCC metabolic alterations, and new insights into the development of early diagnosis and treatment for ESCC. Further investigation is needed to clarify the underlying mechanism of ILF2 and ILF3 on acyl-carnitines and the glycolysis pathway, respectively.

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ICAM1 mRNA Functions Independently of Protein Coding to Inhibit Translation via a dsRNA-ILF2/ILF3 Pathway in Lung Cancer

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