Plasma ctDNA is a tumor tissue surrogate and enables clinical-genomic stratification of metastatic bladder cancer

Gillian Vandekerkhove, Jean Michel Lavoie, Matti Annala, Andrew J. Murtha, Nora Sundahl, Simon Walz, Takeshi Sano, Sinja Taavitsainen, Elie Ritch, Ladan Fazli, Antonio Hurtado-Coll, Gang Wang, Matti Nykter, Peter C. Black, Tilman Todenhöfer, Piet Ost, Ewan A. Gibb, Kim N. Chi, Bernhard J. Eigl, Alexander W. Wyatt

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)
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Abstract

Molecular stratification can improve the management of advanced cancers, but requires relevant tumor samples. Metastatic urothelial carcinoma (mUC) is poised to benefit given a recent expansion of treatment options and its high genomic heterogeneity. We profile minimally-invasive plasma circulating tumor DNA (ctDNA) samples from 104 mUC patients, and compare to same-patient tumor tissue obtained during invasive surgery. Patient ctDNA abundance is independently prognostic for overall survival in patients initiating first-line systemic therapy. Importantly, ctDNA analysis reproduces the somatic driver genome as described from tissue-based cohorts. Furthermore, mutation concordance between ctDNA and matched tumor tissue is 83.4%, enabling benchmarking of proposed clinical biomarkers. While 90% of mutations are identified across serial ctDNA samples, concordance for serial tumor tissue is significantly lower. Overall, our exploratory analysis demonstrates that genomic profiling of ctDNA in mUC is reliable and practical, and mitigates against disease undersampling inherent to studying archival primary tumor foci. We urge the incorporation of cell-free DNA profiling into molecularly-guided clinical trials for mUC.

Original languageEnglish
Article number184
JournalNature Communications
Volume12
Issue number1
DOIs
Publication statusPublished - 2021
Publication typeA1 Journal article-refereed

Publication forum classification

  • Publication forum level 3

ASJC Scopus subject areas

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

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