Abstract
The study aimed to determine whether ULBP2 was associated with prognosis and immune infiltration in colon cancer (CC) and provided important molecular basis in order to early non-invasive diagnosis and immunotherapy of CC. Using The Cancer Genome Atlas database (TCGA) and ImmPort database, we extracted messenger RNA (mRNA) data of CC and immune-related genes, then we used “limma” package, “survival” package, and Venn overlap analysis to obtain the differentially expressed mRNA (DEmRNA) associated with prognosis and immunity of CC patients. “pROC” package was used to analyze receiver operating characteristics (ROC) of target gene. We used chi-square test and two-class logistics model to identify clinicopathological parameters that correlated with target gene expression. In order to determine the effects of target gene expression and clinicopathological parameters on survival, univariate and multivariate cox regression analyses were performed. We analyzed the related functions and signaling pathways of target gene by enrichment analysis. Finally, the correlation between target gene and tumor immune infiltrating was explored by ssGSEA and spearman correlation analysis. Results showed that ULBP2 was a target gene associated with immunity and prognosis in CC patients. CC patients with higher ULBP2 expression had poor outcomes. In terms of ROC, ULBP2 had an area under the curve (AUC) of 0.984. ULBP2 was associated with T stage, N stage, and pathologic stage of CC patients, and served as an independent predictor of overall survival in CC patients. Functional enrichment analysis revealed ULBP2 was obviously enriched in pathways connected with carcinogenesis and immunosuppression. The expression of ULBP2 was significantly associated with tumor immune cells and immune checkpoints according to ssGSEA and spearman correlation analysis. To conclude, our study suggested that ULBP2 was associated with tumor immunity, and might be a biomarker associated with the diagnosis and prognosis of CC patients, and a potential target of CC immunotherapy.
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Acknowledgements
We express our sincere gratitude to the TCGA database, and ImmPort database for data acquisition, and Cuiying Biomedical Research Center for their support of our laboratory equipment and laboratory technology.
Funding
The National Natural Science Foundation of China [Grant number 81770525]; Cuiying Scientific and Technological Innovation Program of Lanzhou University Second Hospital [grant number CY2021-QN-A05]; Natural Science Foundation of Gansu Province [22JR5RA969]; Cuiying Scientific and Technological Key Cultivation Program of Lanzhou University Second Hospital [grant number CY2018-ZD01]; Lanzhou Science and technology project [grant number 2022-ZD-104].
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The original study design was undertaken by DZ and YY. Software and database were performed by XY, XS, and ZRW. Data were analyzed by XY and ZPW. The manuscript was written by XY.
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Yang, X., Su, X., Wang, Z. et al. ULBP2 is a biomarker related to prognosis and immunity in colon cancer. Mol Cell Biochem 478, 2207–2219 (2023). https://doi.org/10.1007/s11010-022-04647-2
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DOI: https://doi.org/10.1007/s11010-022-04647-2