New Acoustic Device Rapidly Isolates Single Cells with high-Speed Levitation
Tianjin,China – Researchers at Tianjin University have developed a novel microfluidic device,dubbed Hypersonic Levitation Spinning (HLS),capable of isolating single cells from tissue samples with significantly improved speed and efficiency compared to conventional methods. The breakthrough, detailed in recent research, utilizes precisely controlled acoustic waves to gently separate cells while maintaining their integrity – a critical factor in sensitive single-cell analysis.
The HLS device leverages the “inverse piezoelectric affect,” where applying an electric field to a material causes it to deform and generate ultrasonic vibrations. These vibrations, reaching billions per second, create acoustic waves within a fluid containing the tissue-enzyme mixture.Beneath each resonator within the device,a reflector directs these waves,establishing a pattern that induces rapid fluid flow and spinning,forming powerful yet delicate liquid jets. These jets are strong enough to dislodge individual cells from tissue clumps without causing damage. Once isolated,the acoustic forces allow the cells to levitate and spin freely within the fluid.
“This intense force field is confined to the fluid, not the cell directly,” explains lead researcher, Duan, emphasizing the controlled nature of the process.
While building on existing acoustic levitation techniques,the HLS device represents a meaningful refinement. Z. Hugh Fan,a biomedical MEMS and microfluidics researcher at the University of Florida,acknowledges the advancement. “HLS is an improvement, not a dramatic change,” he states, but adds that the tool “shows serious potential.”
Testing on human renal cancer tissue samples demonstrated the HLS device’s effectiveness. Researchers successfully isolated 90% of cells in just 15 minutes, a marked improvement over the 70% isolation rate achieved with conventional methods in a full hour. This enhanced performance is attributed to the device’s ability to facilitate enzyme penetration into the tissue, breaking down cellular structures “without the need for harsh mechanical grinding or prolonged enzymatic exposure,” according to Duan.
Though, the technology isn’t without scrutiny. Susztak from the University of Pennsylvania raises concerns about potential impacts on sensitive cells. “Even slight perturbations matter in single-cell work,” she cautions, questioning whether the acoustic fields could disrupt cellular biochemistry.
Beyond biological impact, experts also point to potential implementation challenges. Susztak highlights the need for reliability and robustness in biological labs, noting that MEMS devices in fluid environments are prone to drift and calibration issues. Fan also flags cost and accessibility as hurdles, suggesting commercialization will be key to widespread adoption.
To address these concerns and accelerate development,the Tianjin University team has launched a startup company,Convergency Biotech,focused on creating user-kind HLS workstations for broader laboratory use. Duan expresses optimism about the future of the technology, believing that “MEMS-based acoustic tools will become a mainstream component of the biological toolkit.”
despite cautious optimism, Susztak concludes that HLS is “a clever tool with genuine promise,” but emphasizes the need for rigorous validation. “It must prove itself in the messy world of real biology.”
