Abstract
Objective
Immunogenic cell death (ICD) has emerged as a promising strategy to activate the adaptive immune response, modulate the tumor microenvironment (TME) and enhance the efficacy of immune therapy. However, the relationship between ICD and TME reprogramming in hepatocellular carcinoma (HCC) remains poorly understood.
Methods
Transcriptional profiles and clinical spectrum of 486 HCC patients were obtained from TCGA and GEO databases. We utilized consensus clustering analysis to construct two distinct molecular subtypes and established an ICD-based scoring system (named ICD score) via WGCNA and LASSO Cox regression to predict the prognosis of the HCC cohort. Then we employed CIBERSORT and ESTIMATE methods to analyze the immune landscape of ICD score in HCC. Subsequently, the immunophenoscore (IPS) and tumor immune dysfunction and rejection (TIDE) analyses were performed to determine whether the ICD score could influence the immune therapeutic effect. Based on the ICD scoring system, a novel nomogram was generated to provide a numerical probability of HCC patients’ overall survival (OS).
Results
We identified two independent ICD clusters (cluster A/B), and cluster B possessed a worse prognosis and higher immune cell infiltration. Using ICD scoring system, the HCC patients were divided into high- and low-ICD-score groups. Through integrative analyses, the high-ICD cohort owned advanced TNM stage, high pathologic grade and increased suppressive immune cell enrichment. We developed a nomogram containing the ICD score, demonstrating a high predictive accuracy with a C-index of 0.703. We further discovered that PSMD2 and PSMD14 could serve as ICD-associated prognostic biomarkers and therapeutic targets in HCC.
Conclusion
The ICD score exhibits a high degree of reliability for predicting prognosis and may provide valuable guidance for the selection of immunotherapy for HCC patients. This novel scoring system enables the estimation of clinical immunotherapy response for HCC patients, offering new opportunities for personalized immunotherapy.
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Data availability
The data used to support the findings of this study are available from the public databases, including TCGA database (https://gdcportal.nci.nih.gov/) and GEO database (http://www.ncbi.nlm.nih.gov/geo/, containing datasets of GSE76427).
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Funding
This work was supported by the Science Technology Department of Zhejiang Province (2023C03063), Huadong Medicine Joint Funds of the Zhejiang Provincial Natural Science Foundation of China (LHDMD22H310005), the Health Commission of Zhejiang Province (JBZX-202004 and 2023RC013) and National Natural Science Foundation of China Grant (NO. 82073144 and NO. 82202974).
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JW, DYC and GMX designed/planned the study. GMX, YFJ, YL, JZG and XFX acquired and analyzed data, performed computational modeling. GMX, YFJ, DYC and JW wrote and revised the manuscript. DYC and JW supervised the study. All authors participated in imaging analysis and discussion of related data and approved the submitted version.
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432_2023_5370_MOESM3_ESM.jpg
Supplementary file3 (JPG 2464 KB) Supplement Figure 2 We conducted a univariate COX regression analysis of the 33 ICD-related genes and found that 23 genes were associated with the prognosis of HCC
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Supplementary file4 (JPG 2103 KB) Supplement Figure 3 Based on the K–M analyses, we observed that the OS of five hub mRNA and lncRNA was significantly lower in the high-expression group than in the low-expression group
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Supplementary file5 (JPG 1231 KB) Supplement Figure 4 Validation of the stability of the ICD score model. (a) We conducted the PCA analysis of ICD score, revealing that two ICD score clusters could distinguish HCC patients, vividly. A (blue) and B (yellow). (b) The Kaplan–Meier curves showed the high-ICD-score group had a worse OS. (c) An alluvial diagram was created to depict the relationship between the ICD clusters, ICD score and living status. (d) The diagram demonstrated a significant correlation between the ICD score and T and B cells. (e) The boxplot indicated that patients in ICD cluster A had a higher ICD score
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Supplementary file6 (JPG 653 KB) Supplement Figure 5 We performed differential analyses of ten genes resulted from PPI analysis between HCC samples and normal individuals obtained from the GEPIA database, revealing that PSMD2 and PSMD14 were significantly up-regulated in HCC patients
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Supplementary file7 (JPG 1584 KB) Supplement Figure 6 The K–M curves showed that patients with low expressions of PSMD2 and PSMD14 had significantly better overall survival (OS) rate
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Supplementary file8 (JPG 921 KB) Supplement Figure 7 PSMD2 had good relationship with the mainly ICD-related genes consisting of CALR, CASP1, CASP8, HMGB2 and HSP90AA1 as well as PSMD14
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Xu, G., Jiang, Y., Li, Y. et al. A novel immunogenic cell death-related genes signature for predicting prognosis, immune landscape and immunotherapy effect in hepatocellular carcinoma. J Cancer Res Clin Oncol 149, 16261–16277 (2023). https://doi.org/10.1007/s00432-023-05370-1
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DOI: https://doi.org/10.1007/s00432-023-05370-1