Whole-genome analysis of Nigerian patients with breast cancer reveals ethnic-driven somatic evolution and distinct genomic subtypes

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2021
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Nature Communications. Springer. 2021, 12(1), 6946. eISSN 2041-1723. Available under: doi: 10.1038/s41467-021-27079-w
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Black women across the African diaspora experience more aggressive breast cancer with higher mortality rates than white women of European ancestry. Although inter-ethnic germline variation is known, differential somatic evolution has not been investigated in detail. Analysis of deep whole genomes of 97 breast cancers, with RNA-seq in a subset, from women in Nigeria in comparison with The Cancer Genome Atlas (n = 76) reveal a higher rate of genomic instability and increased intra-tumoral heterogeneity as well as a unique genomic subtype defined by early clonal GATA3 mutations with a 10.5-year younger age at diagnosis. We also find non-coding mutations in bona fide drivers ( ZNF217 and SYPL1 ) and a previously unreported INDEL signature strongly associated with African ancestry proportion, underscoring the need to expand inclusion of diverse populations in biomedical research. Finally, we demonstrate that characterizing tumors for homologous recombination deficiency has significant clinical relevance in stratifying patients for potentially life-saving therapies.

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ISO 690ANSARI-POUR, Naser, Yonglan ZHENG, Toshio F. YOSHIMATSU, Ayodele SANNI, Mustapha AJANI, Jean-Baptiste REYNIER, Avraam TAPINOS, Andreas J. GRUBER, David C. WEDGE, Olufunmilayo I. OLOPADE, 2021. Whole-genome analysis of Nigerian patients with breast cancer reveals ethnic-driven somatic evolution and distinct genomic subtypes. In: Nature Communications. Springer. 2021, 12(1), 6946. eISSN 2041-1723. Available under: doi: 10.1038/s41467-021-27079-w
BibTex
@article{AnsariPour2021-11-26Whole-66381,
  year={2021},
  doi={10.1038/s41467-021-27079-w},
  title={Whole-genome analysis of Nigerian patients with breast cancer reveals ethnic-driven somatic evolution and distinct genomic subtypes},
  number={1},
  volume={12},
  journal={Nature Communications},
  author={Ansari-Pour, Naser and Zheng, Yonglan and Yoshimatsu, Toshio F. and Sanni, Ayodele and Ajani, Mustapha and Reynier, Jean-Baptiste and Tapinos, Avraam and Gruber, Andreas J. and Wedge, David C. and Olopade, Olufunmilayo I.},
  note={Article Number: 6946}
}
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