Abstract
Background
Cancer cell growth, metastasis, and drug resistance are major challenges in treating liver hepatocellular carcinoma (LIHC). However, the lack of comprehensive and reliable models hamper the effectiveness of the predictive, preventive, and personalized medicine (PPPM/3PM) strategy in managing LIHC.
Methods
Leveraging seven distinct patterns of mitochondrial cell death (MCD), we conducted a multi-omic screening of MCD-related genes. A novel machine learning framework was developed, integrating 10 machine learning algorithms with 67 different combinations to establish a consensus mitochondrial cell death index (MCDI). This index underwent rigorous evaluation across training, validation, and in-house clinical cohorts. A comprehensive multi-omics analysis encompassing bulk, single-cell, and spatial transcriptomics was employed to achieve a deeper insight into the constructed signature. The response of risk subgroups to immunotherapy and targeted therapy was evaluated and validated. RT-qPCR, western blotting, and immunohistochemical staining were utilized for findings validation.
Results
Nine critical differentially expressed MCD-related genes were identified in LIHC. A consensus MCDI was constructed based on a 67-combination machine learning computational framework, demonstrating outstanding performance in predicting prognosis and clinical translation. MCDI correlated with immune infiltration, Tumor Immune Dysfunction and Exclusion (TIDE) score and sorafenib sensitivity. Findings were validated experimentally. Moreover, we identified PAK1IP1 as the most important gene for predicting LIHC prognosis and validated its potential as an indicator of prognosis and sorafenib response in our in-house clinical cohorts.
Conclusion
This study developed a novel predictive model for LIHC, namely MCDI. Incorporating MCDI into the PPPM framework will enhance clinical decision-making processes and optimize individualized treatment strategies for LIHC patients.
Graphical Abstract
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Data availability
All the data used in this study were collected in this article and supplemental materials.
Availability of data and materials
TCGA datasets enrolled in this study are openly available in the National Cancer Institute GDC Data Portal (https://portal.gdc.cancer.gov/). TCGA data are displayed under the Project IDs “TCGA-LIHC.” GEO datasets are publicly available in the National Center for Biotechnology Information Portal (https://www.ncbi.nlm.nih.gov/geo/), including GSE14520 and GSE156625. ICGC-LIRI dataset is openly available in ICGC (https://dcc.icgc.org/releases/current/Projects). The spatial transcriptomics of LIHC cohorts can be obtained from Mendeley Data (skrx2fz79n). IMvigor210 bladder cancer cohort can be accessed from http://research-pub.gene.com/IMvigor210CoreBiologies.
Code availability
Analyses were conducted using R (version 4.2.1) and GraphPad (GraphPad Prism 8.0). The codes used to support the findings of this study is available from the corresponding author on reasonable request.
Abbreviations
- AUC:
-
Area under the curve
- BCLC:
-
Barcelona Clinic Liver Cancer
- CC:
-
Consensus clustering
- CI:
-
Confidence interval
- CNV:
-
Copy number variation
- DCA:
-
Decision curve analysis
- EPO:
-
Erythropoietin
- G6PD:
-
Glucose-6-phosphate dehydrogenase
- GDSC:
-
Genomics of Drug Sensitivity in Cancer
- GEO:
-
Gene Expression Omnibus
- GINS1:
-
GINS complex subunit 1 (Sld5 homolog)
- GO:
-
Gene ontology
- GSVA:
-
Gene set variation analysis
- HR:
-
Hazard ratio
- IHC:
-
Immunohistochemistry
- ICGC:
-
International Cancer Genome Consortium
- KEGG:
-
Kyoto Encyclopedia of Genes and Genomes
- LASSO:
-
Least absolute shrinkage and selection operator
- LOOCV:
-
Leave-one-out cross-validation
- LIHC:
-
Liver hepatocellular carcinoma
- MCD:
-
Mitochondria-associated cell death
- MCD-DEGs:
-
Mitochondria-associated cell death differentially expressed genes
- MCDI:
-
Mitochondrial cell death index
- MCDS:
-
Mitochondria-associated cell death signature genes
- NC:
-
Normal controls
- OS:
-
Overall survival
- PAK1IP1:
-
P21-activated kinase 1 interacting protein 1
- PCA:
-
Principal component analysis
- PPPM:
-
Predictive, preventive, and personalized medicine
- RFS:
-
Recurrence-free survival
- RT-qPCR:
-
Reverse transcription-quantitative polymerase chain reaction
- ROC:
-
Receiver operating characteristic
- RSF:
-
Random survival forest
- TIDE:
-
Tumor Immune Dysfunction and Exclusion
- TIMER:
-
Tumor Immune Estimation Resource
- UMAP:
-
Uniform Manifold Approximation and Projection
- SD:
-
Standard deviation
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Funding
This work was supported by a grant from the National Natural Science Foundation of China (82002588, 32300731), the Natural Science Foundation project of Shanghai (23ZR1477200), the State Key Laboratory of the Cancer Biology Project (CBSKL2022ZDKF05) and the Shanghai Key Laboratory of Cell Engineering (14DZ2272300).
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All authors searched the literature, designed the study, interpreted the findings, and revised the manuscript. DTH, XS, and PG carried out data management and statistical analysis and drafted the manuscript. DTH, XS, PG, TTM, YC, WFS, YGZ, and JD helped with cohort identification and data management. YGZ and JD contributed to the critical revision of the manuscript.
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All participants were enrolled from the Eastern Hepatobiliary Surgery Hospital (EHBH), and the sample collection procedure was approved by the ethics committee of EHBH.
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Dingtao Hu, Xu Shen, and Peng Gao share co-first authorship.
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Hu, D., Shen, X., Gao, P. et al. Multi-omic profiling reveals potential biomarkers of hepatocellular carcinoma prognosis and therapy response among mitochondria-associated cell death genes in the context of 3P medicine. EPMA Journal (2024). https://doi.org/10.1007/s13167-024-00362-8
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DOI: https://doi.org/10.1007/s13167-024-00362-8