Researchers have demonstrated a microfluidic device that significantly improves the separation of tumor cells and clumps from malignant collections. This new technology promises to advance the diagnosis and monitoring of cancer therapy by enabling the ternary separation of single tumor cells, tumor cell clusters, and white blood cells (WBCs) from high-throughput, continuous-flow clinical pleural or ventricular collections.
Understanding the nature of malignant collections, filled with tumor cells and clusters, is critical to understanding the range of cancer’s effects. The important role of tumor clusters, with their increased potential for metastasis compared to single cells, cannot be overstated in the context of integrated cancer care. While traditional techniques have shown ability in isolating single cancer cells, they often fall short when it comes to groups of tumors, thus limiting the scope of clinical research. The evolution of microfluidic technologies has introduced high-throughput, label-free approaches to separate these cells, exploiting their physical characteristics for more precise analyses. However, the challenges presented by cancer cell populations—mainly their rarity and fragility—require innovative solutions to ensure their efficient yet careful separation while maintaining their viability for downstream applications.
In response to this challenge, a team of researchers from Southeast University presented a microfluidic device designed to achieve precise separation of tumor entities with unprecedented efficiency. These findings were detailed in an article (DOI: 10.1038/s41378-024-00661-0) published March 12, 2024, in Microsystems & Nanomechanics. This research introduces a device that skillfully integrates oblique spiral channels with periodic contraction-expansion arrays.
This design uses inertial forces to skillfully separate individual tumor cells, clusters of tumor cells, and WBCs from clinical samples of pleural or abdominal effusions—key markers of cancer metastasis. Operating at a fast flow rate of 3500 µL/min, the device not only efficiently handles large volumes, but also ensures an extremely high degree of separation accuracy. With over 94% of white blood cells effectively removed, recovery of over 97% of cancer cells and preservation of over 90% of viable tumor cell clusters, this technology heralds a new era in cancer diagnosis, facilitating early detection, assessment of prognosis and monitoring of treatment results.
Our device represents a major advance in the analysis of malignant collections. By efficiently isolating clusters of cancer cells, known for their significant metastatic potential, we are forging new avenues for the early detection and treatment of cancer.”
Professor Nan Xiang, lead author of the study
This innovation marks an important milestone in the realm of cancer diagnostics, enhancing the efficiency and performance of separating tumor cells and clusters from malignant collections. As such, it lays the groundwork for finer cancer detection, continuous monitoring and individualized treatment strategies, heralding a promising future for cancer care.
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Journal Reference:
Zhou, Z., et al. (2024). High-throughput and simultaneous inertial separation of cancer cells and clusters from malignant collections using spiral contraction-expansion channels. Microsystems & Nanomechanics. doi.org/10.1038/s41378-024-00661-0.
