Circulating Tumor Cell (CTC) Isolation with TellDx Technology Could Inform Personalized Drug Treatment in Prostate Cancer

— Single-cell proteomics can elucidate kinase activity in prostate cancer models —

— Kinase activity in bone metastases and epithelial circulating tumor cells is elevated —

Excerpt from the Press Release:

BEVERLY, Mass., Jan. 20, 2022 (GLOBE NEWSWIRE) — TellBio, Inc., a development stage biotechnology company focused on revolutionizing the detection of cancer through its unique and proprietary circulating tumor cell (CTC) technology, TellDx, and treatment through its complementary therapeutics platform, TellRx, announces publication of data from the scientific founders that provide insights into mechanisms of PI3K/mTOR signaling in preclinical models of prostate cancer. The results were published online yesterday in Cancer Research (DOI 10.1158/0008-5472.CAN-21-2609).

Circulating tumor cells (CTC) isolation is an emerging minimally invasive liquid biopsy approach that provides the basis for a multitude of downstream studies including genomic, transcriptomic, and proteomic analyses. This less invasive approach of isolating viable and intact CTCs with the TellDx platform and subsequent single-cell analyses have been applied to elucidate dynamic adaptations of metastatic cancer cells.

“Patients with advanced solid tumors have variable response to therapy because of differences in biology of primary and metastatic tumor sites. Isolation of the spectrum of CTCs with TellDx and subsequent single-cell proteomic analyses could shed light into mechanisms of drug sensitivity and inform delivery of tailored therapies to potentially optimize patient outcomes,” said Pritesh J. Gandhi, PharmD, CEO, TellBio.

Cancer progression and selection pressures due to cancer pharmacotherapy result in evolution of the cancer microenvironment. Single-cell proteomics provides critical insights into inter- and intra-tumor heterogeneity and mechanisms of differential therapeutic response across the primary tumor, CTCs, and distal tumor growth.

In this paper, the authors, including TellBio scientific founders, Drs David Ting, Daniel A. Haber, Mehmet Toner, and Shyamala Maheswaran of Massachusetts General Hospital Center for Cancer Research, describe, for the first-time, inter- and intra-tumoral differences in kinase activity (PI3K/mTOR) in mouse models of prostate cancer. Single cell proteomics to assess the differences in PI3K/mTOR signaling across different tumor deposits/metastatic sites and CTC populations was employed using enriched CTCs isolated via the TellDx platform.

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