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Identification of Prognostic Dosage-Sensitive Genes in Colorectal Cancer Based on Multi-Omics
Several studies have already identified the prognostic markers in colorectal cancer (CRC) based on somatic copy number alteration (SCNA). However, very little information is available regarding their value as a prognostic marker. Gene dosage effect is one important mechanism of copy number and dosag...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Frontiers Media S.A.
2020
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6962299/ https://www.ncbi.nlm.nih.gov/pubmed/31998369 http://dx.doi.org/10.3389/fgene.2019.01310 |
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author | Chang, Zhiqiang Miao, Xiuxiu Zhao, Wenyuan |
author_facet | Chang, Zhiqiang Miao, Xiuxiu Zhao, Wenyuan |
author_sort | Chang, Zhiqiang |
collection | PubMed |
description | Several studies have already identified the prognostic markers in colorectal cancer (CRC) based on somatic copy number alteration (SCNA). However, very little information is available regarding their value as a prognostic marker. Gene dosage effect is one important mechanism of copy number and dosage-sensitive genes are more likely to behave like driver genes. In this work, we propose a new pipeline to identify the dosage-sensitive prognostic genes in CRC. The RNAseq data, the somatic copy number of CRC from TCGA were assayed to screen out the SCNAs. Wilcoxon rank-sum test was used to identify the differentially expressed genes in alteration samples with |SCNA| > 0.3. Cox-regression was used to find the candidate prognostic genes. An iterative algorithm was built to identify the stable prognostic genes. Finally, the Pearson correlation coefficient was calculated between gene expression and SCNA as the dosage effect score. The cell line data from CCLE was used to test the consistency of the dosage effect. The differential co-expression network was built to discover their function in CRC. A total of six amplified genes (NDUFB4, WDR5B, IQCB1, KPNA1, GTF2E1, and SEC22A) were found to be associated with poor prognosis. They demonstrate a stable prognostic classification in more than 50% threshold of SCNA. The average dosage effect score was 0.5918 ± 0.066, 0.5978 ± 0.082 in TCGA and CCLE, respectively. They also show great stability in different data sets. In the differential co-expression network, these six genes have the top degree and are connected to the driver and tumor suppressor genes. Function enrichment analysis revealed that gene NDUFB4 and GTF2E1 affect cancer-related functions such as transmembrane transport and transformation factors. In conclusion, the pipeline for identifying the prognostic dosage-sensitive genes in CRC was proved to be stable and reliable. |
format | Online Article Text |
id | pubmed-6962299 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Frontiers Media S.A. |
record_format | MEDLINE/PubMed |
spelling | pubmed-69622992020-01-29 Identification of Prognostic Dosage-Sensitive Genes in Colorectal Cancer Based on Multi-Omics Chang, Zhiqiang Miao, Xiuxiu Zhao, Wenyuan Front Genet Genetics Several studies have already identified the prognostic markers in colorectal cancer (CRC) based on somatic copy number alteration (SCNA). However, very little information is available regarding their value as a prognostic marker. Gene dosage effect is one important mechanism of copy number and dosage-sensitive genes are more likely to behave like driver genes. In this work, we propose a new pipeline to identify the dosage-sensitive prognostic genes in CRC. The RNAseq data, the somatic copy number of CRC from TCGA were assayed to screen out the SCNAs. Wilcoxon rank-sum test was used to identify the differentially expressed genes in alteration samples with |SCNA| > 0.3. Cox-regression was used to find the candidate prognostic genes. An iterative algorithm was built to identify the stable prognostic genes. Finally, the Pearson correlation coefficient was calculated between gene expression and SCNA as the dosage effect score. The cell line data from CCLE was used to test the consistency of the dosage effect. The differential co-expression network was built to discover their function in CRC. A total of six amplified genes (NDUFB4, WDR5B, IQCB1, KPNA1, GTF2E1, and SEC22A) were found to be associated with poor prognosis. They demonstrate a stable prognostic classification in more than 50% threshold of SCNA. The average dosage effect score was 0.5918 ± 0.066, 0.5978 ± 0.082 in TCGA and CCLE, respectively. They also show great stability in different data sets. In the differential co-expression network, these six genes have the top degree and are connected to the driver and tumor suppressor genes. Function enrichment analysis revealed that gene NDUFB4 and GTF2E1 affect cancer-related functions such as transmembrane transport and transformation factors. In conclusion, the pipeline for identifying the prognostic dosage-sensitive genes in CRC was proved to be stable and reliable. Frontiers Media S.A. 2020-01-09 /pmc/articles/PMC6962299/ /pubmed/31998369 http://dx.doi.org/10.3389/fgene.2019.01310 Text en Copyright © 2020 Chang, Miao and Zhao http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. |
spellingShingle | Genetics Chang, Zhiqiang Miao, Xiuxiu Zhao, Wenyuan Identification of Prognostic Dosage-Sensitive Genes in Colorectal Cancer Based on Multi-Omics |
title | Identification of Prognostic Dosage-Sensitive Genes in Colorectal Cancer Based on Multi-Omics |
title_full | Identification of Prognostic Dosage-Sensitive Genes in Colorectal Cancer Based on Multi-Omics |
title_fullStr | Identification of Prognostic Dosage-Sensitive Genes in Colorectal Cancer Based on Multi-Omics |
title_full_unstemmed | Identification of Prognostic Dosage-Sensitive Genes in Colorectal Cancer Based on Multi-Omics |
title_short | Identification of Prognostic Dosage-Sensitive Genes in Colorectal Cancer Based on Multi-Omics |
title_sort | identification of prognostic dosage-sensitive genes in colorectal cancer based on multi-omics |
topic | Genetics |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6962299/ https://www.ncbi.nlm.nih.gov/pubmed/31998369 http://dx.doi.org/10.3389/fgene.2019.01310 |
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