Genotype-based gene expression in colon tissue: prediction accuracy and relationship with the prognosis of colorectal cancer patients
Colorectal cancer (CRC) survival has environmental and inherited components. The expression of specific genes can be inferred based on individual genotypes—so called expression quantitative trait loci. In this study, we used the PrediXcan method to predict gene expression in normal colon t...
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| Hauptverfasser: | , , , , , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
31 October 2020
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| In: |
International journal of molecular sciences
Year: 2020, Jahrgang: 21, Heft: 21 |
| ISSN: | 1422-0067 |
| DOI: | 10.3390/ijms21218150 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.3390/ijms21218150 Verlag, lizenzpflichtig, Volltext: https://www.mdpi.com/1422-0067/21/21/8150 
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| Verfasserangaben: | Heike Deutelmoser, Justo Lorenzo Bermejo, Axel Benner, Korbinian Weigl, Hanla A. Park, Mariam Haffa, Esther Herpel, Martin Schneider, Cornelia M. Ulrich, Michael Hoffmeister, Jenny Chang-Claude, Hermann Brenner and Dominique Scherer |
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| 245 | 1 | 0 | |a Genotype-based gene expression in colon tissue |b prediction accuracy and relationship with the prognosis of colorectal cancer patients |c Heike Deutelmoser, Justo Lorenzo Bermejo, Axel Benner, Korbinian Weigl, Hanla A. Park, Mariam Haffa, Esther Herpel, Martin Schneider, Cornelia M. Ulrich, Michael Hoffmeister, Jenny Chang-Claude, Hermann Brenner and Dominique Scherer |
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| 520 | |a Colorectal cancer (CRC) survival has environmental and inherited components. The expression of specific genes can be inferred based on individual genotypes—so called expression quantitative trait loci. In this study, we used the PrediXcan method to predict gene expression in normal colon tissue using individual genotype data from 91 CRC patients and examined the correlation ρ between predicted and measured gene expression levels. Out of 5434 predicted genes, 58% showed a negative ρ value and only 16% presented a ρ higher than 0.10. We subsequently investigated the association between genotype-based gene expression in colon tissue for genes with ρ > 0.10 and survival of 4436 CRC patients. We identified an inverse association between the predicted expression of ARID3B and CRC-specific survival for patients with a body mass index greater than or equal to 30 kg/m2 (HR (hazard ratio) = 0.66 for an expression higher vs. lower than the median, p = 0.005). This association was validated using genotype and clinical data from the UK Biobank (HR = 0.74, p = 0.04). In addition to the identification of ARID3B expression in normal colon tissue as a candidate prognostic biomarker for obese CRC patients, our study illustrates the challenges of genotype-based prediction of gene expression, and the advantage of reassessing the prediction accuracy in a subset of the study population using measured gene expression data. | ||
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