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Details

Autor(en) / Beteiligte
Titel
Whole-exome sequencing of circulating tumor cells provides a window into metastatic prostate cancer
Ist Teil von
  • Nature biotechnology, 2014-05, Vol.32 (5), p.479-484
Ort / Verlag
New York: Nature Publishing Group US
Erscheinungsjahr
2014
Quelle
MEDLINE
Beschreibungen/Notizen
  • Whole-exome sequencing of circulating tumor cells enables accurate and powered calling of somatic point mutations. Comprehensive analyses of cancer genomes promise to inform prognoses and precise cancer treatments. A major barrier, however, is inaccessibility of metastatic tissue. A potential solution is to characterize circulating tumor cells (CTCs), but this requires overcoming the challenges of isolating rare cells and sequencing low-input material. Here we report an integrated process to isolate, qualify and sequence whole exomes of CTCs with high fidelity using a census-based sequencing strategy. Power calculations suggest that mapping of >99.995% of the standard exome is possible in CTCs. We validated our process in two patients with prostate cancer, including one for whom we sequenced CTCs, a lymph node metastasis and nine cores of the primary tumor. Fifty-one of 73 CTC mutations (70%) were present in matched tissue. Moreover, we identified 10 early trunk and 56 metastatic trunk mutations in the non-CTC tumor samples and found 90% and 73% of these mutations, respectively, in CTC exomes. This study establishes a foundation for CTC genomics in the clinic.

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