Human genetic determinants of tamoxifen metabolism
Germline DNA variants have been found to have an impact on a diverse range of human traits, including the ability to metabolise drugs. In this study, we analysed the association between human genetic variants and serum tamoxifen metabolite levels at steady state in breast cancer patients from Singap...
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sg-ntu-dr.10356-1508392023-02-28T18:48:33Z Human genetic determinants of tamoxifen metabolism Koh, Everett Chier Wei - School of Biological Sciences Genome Institute of Singapore Ng Huck Hui Koh Cheng Gee Khor Chiea Chuen nghh@ntu.edu.sg, cgkoh@ntu.edu.sg, khorcc@gis.a-star.edu.sg Science::Biological sciences::Genetics Germline DNA variants have been found to have an impact on a diverse range of human traits, including the ability to metabolise drugs. In this study, we analysed the association between human genetic variants and serum tamoxifen metabolite levels at steady state in breast cancer patients from Singapore, Germany, and Lebanon. Our study found a strong association between a common genetic marker (rs5751245) on Chromosome 22 with log-transformed serum endoxifen levels (p=1.2 ×10^(-28)). Because CYP2D6 is a well-known metaboliser of endoxifen, we also conducted genome-wide association for CYP2D6 expression quantitative trait loci (eQTL). We found a common genetic marker (rs2413670) to be strongly associated with both endoxifen (p_endo=1.2 ×10^(-23)) and CYP2D6 eQTL (p_(CYP2D6_eQTL )=2.9 ×10^(-14)). In combination, rs5751245 and rs2413670 explain up to 30% of the variance observed in steady-state serum endoxifen levels. Our findings further contribute to our understanding of the genetic architecture of endoxifen metabolism, with the potential for translation into better outcomes for estrogen-receptor positive breast cancer patients. Doctor of Philosophy 2021-06-23T04:54:11Z 2021-06-23T04:54:11Z 2020 Thesis-Doctor of Philosophy Koh, E. C. W. (2020). Human genetic determinants of tamoxifen metabolism. Doctoral thesis, Nanyang Technological University, Singapore. https://hdl.handle.net/10356/150839 https://hdl.handle.net/10356/150839 10.32657/10356/150839 en This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0). application/pdf Nanyang Technological University |
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Science::Biological sciences::Genetics Koh, Everett Chier Wei Human genetic determinants of tamoxifen metabolism |
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Germline DNA variants have been found to have an impact on a diverse range of human traits, including the ability to metabolise drugs. In this study, we analysed the association between human genetic variants and serum tamoxifen metabolite levels at steady state in breast cancer patients from Singapore, Germany, and Lebanon. Our study found a strong association between a common genetic marker (rs5751245) on Chromosome 22 with log-transformed serum endoxifen levels (p=1.2 ×10^(-28)). Because CYP2D6 is a well-known metaboliser of endoxifen, we also conducted genome-wide association for CYP2D6 expression quantitative trait loci (eQTL). We found a common genetic marker (rs2413670) to be strongly associated with both endoxifen (p_endo=1.2 ×10^(-23)) and CYP2D6 eQTL (p_(CYP2D6_eQTL )=2.9 ×10^(-14)). In combination, rs5751245 and rs2413670 explain up to 30% of the variance observed in steady-state serum endoxifen levels. Our findings further contribute to our understanding of the genetic architecture of endoxifen metabolism, with the potential for translation into better outcomes for estrogen-receptor positive breast cancer patients. |
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- Koh, Everett Chier Wei |
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Thesis-Doctor of Philosophy |
author |
Koh, Everett Chier Wei |
author_sort |
Koh, Everett Chier Wei |
title |
Human genetic determinants of tamoxifen metabolism |
title_short |
Human genetic determinants of tamoxifen metabolism |
title_full |
Human genetic determinants of tamoxifen metabolism |
title_fullStr |
Human genetic determinants of tamoxifen metabolism |
title_full_unstemmed |
Human genetic determinants of tamoxifen metabolism |
title_sort |
human genetic determinants of tamoxifen metabolism |
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Nanyang Technological University |
publishDate |
2021 |
url |
https://hdl.handle.net/10356/150839 |
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