Abstract
Metastasis of clear cell renal cell carcinoma (ccRCC) is a leading cause of death. The purpose of this research was to investigate the key gene in ccRCC tumor metastasis. Three microarray datasets (GSE22541, GSE85258, and GSE105261), which included primary and metastatic ccRCC tissues, were obtained from the Gene Expression Omnibus (GEO) database. Expression profiling and clinical data of ccRCC were downloaded from The Cancer Genome Atlas (TCGA) dataset. A total of 20 overlapping differentially expressed genes (DEGs) were identified using the R limma package. Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis indicated that the DEGs were mainly enriched in tumor metastasis-related pathways. Gene expression analysis and survival analysis in the GEPIA2 database further identified the key gene HSD11B2. qRT-PCR result manifested that HSD11B2 level was significantly down-regulated in ccRCC tissues compared with adjacent normal tissues. ROC analysis showed that HSD11B2 exhibited good diagnostic efficiency for metastatic and non-metastatic ccRCC. Univariate and multivariate Cox regression analysis showed that HSD11B2 expression was an independent prognostic factor. To establish a nomogram combining HSD11B2 expression and clinical factors, and a new method for predicting the survival probability of ccRCC patients. Gene Set Enrichment Analysis (GSEA) enrichment results showed that low expression of HSD11B2 was mainly enriched in tumor signaling pathways and immune-related pathways. Immune analysis revealed a significant correlation between HSD11B2 and tumor immune infiltrates in ccRCC. This study suggests that HSD11B2 can serve as a potential biomarker and therapeutic target for ccRCC metastasis.
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Data availability
The datasets presented in this study can be found in online repositories. The names of the repository/repositories and accession number(s) can be found in the article. All data generated or analyzed during this study are included in this published article [and its supplementary information files].
Abbreviations
- ccRCC:
-
Clear cell renal cell carcinoma
- RCC:
-
Renal cell carcinoma
- DEGs:
-
Differentially expressed genes
- GEO:
-
Gene expression omnibus
- GO:
-
Gene ontology
- OS:
-
Overall survival
- TCGA:
-
The cancer genome atlas
- KEGG:
-
Kyoto encyclopedia of genes and genomes
- qRT-PCR:
-
Quantitative real-time PCR
- GSEA:
-
Gene set enrichment analysis
- GEPIA2:
-
The gene expression profiling interactive analysis 2
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Acknowledgements
Thanks to contributors to the GEO database and TCGA database for their platforms and datasets. And thanks to the researchers and study participants for their contributions.
Funding
This work was supported by a grant from The Intelligence Medicine Project of Chongqing Medical University, China (No. ZHYX2019015 to Longke Ran).
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All authors contributed to the study conception and design. LR and HW designed the experimental flow. SM collected and downloaded the data. JS and QL analyzed the data. JL and SM wrote the manuscript. All authors read and approved the final manuscript.
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This study was performed in line with the principles of the Declaration of Helsinki. The study was approved by the Ethics Committee of the First Affiliated Hospital of Chongqing Medical University (The ethical approval number: 2021-465). In addition, A preprint has previously been published in Research Square (link:https://www.researchsquare.com/article/rs-885592/v1). This is a preprint, a preliminary version of a manuscript that has not completed peer review at a journal.
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Miao, S., Song, J., Liu, Q. et al. Integrated bioinformatics analysis to identify the key gene associated with metastatic clear cell renal cell carcinoma. Med Oncol 39, 128 (2022). https://doi.org/10.1007/s12032-022-01706-y
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DOI: https://doi.org/10.1007/s12032-022-01706-y