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- Title
Cancer transcriptomic profiling from rapidly enriched circulating tumor cells.
- Authors
Morrison, Gareth J.; Cunha, Alexander T.; Jojo, Nita; Xu, Yucheng; Xu, Yili; Kwok, Eric; Robinson, Peggy; Dorff, Tanya; Quinn, David; Carpten, John; Manojlovic, Zarko; Goldkorn, Amir
- Abstract
Transcriptomic profiling of metastatic cancer can illuminate mechanisms of progression and lead to new therapies, but standard biopsy is invasive and reflects only a single metastatic site. In contrast, circulating tumor cell (CTC) profiling is noninvasive and repeatable, reflecting the dynamic and systemic nature of advanced disease. To date, transcriptomic profiling of CTCs has not delivered on its full potential, because white blood cells (WBCs) vastly outnumber CTCs. Current profiling strategies either lack cancer sensitivity and specificity or require specialized CTC capture protocols that are not readily scalable to large patient cohorts. Here, we describe a new strategy for rapid CTC enrichment and transcriptomic profiling using commercially available WBC depletion, microfluidic enrichment and RNA sequencing. When applied to blood samples from patients with advanced prostate cancer (PC), transcriptomes from enriched samples cluster with cancer positive controls and previously undetectable prostate‐specific transcripts become readily measurable. Gene set enrichment analysis reveals multiple significantly enriched signaling pathways associated with PC, as well as novel pathways that merit further study. This accessible and scalable approach yields cancer‐specific transcriptomic data and can be applied repeatedly and noninvasively in large cancer patient cohorts to discover new therapeutic targets in advanced disease. What's new?: Current strategies for the transcriptomic profiling of circulating tumor cell (CTCs) either lack cancer sensitivity and specificity or are not readily scalable to large patient cohorts. Here, the authors describe a new strategy using commercially‐available technologies to rapidly and effectively enrich CTC RNA for whole transcriptome sequencing. This straightforward approach is readily scalable to large numbers of patient blood samples and yields expression profiles marked by numerous cancer‐specific genes and pathways. Hence, the new strategy can be used to sample cancer transcriptomes repeatedly and noninvasively in advanced malignancies in order to gain new mechanistic insights and identify novel therapeutic targets.
- Subjects
LEUCOCYTES; NUCLEOTIDE sequence; PROSTATE cancer patients; CANCER; METASTASIS
- Publication
International Journal of Cancer, 2020, Vol 146, Issue 10, p2845
- ISSN
0020-7136
- Publication type
Article
- DOI
10.1002/ijc.32915