Reconfigurable acoustic tweezer for precise tracking and in-situ sensing of trace miRNAs in tumor cells.

MicroRNAs (miRNAs) have emerged as critical biomarkers for early cancer diagnosis and monitoring. However, their isolation from clinical samples typically yields only trace amounts, significantly limiting the sensitivity and efficiency of cancer detection. To address this challenge, we present a octangular reconfigurable acoustic tweezer (ORAT) as an integrated platform for precise tumor cell tracking and in-situ detection of trace miRNAs. By simultaneously modulating multidirectional acoustic signals and parameters, the ORAT dynamically reshapes the acoustic field, enabling precise control over manipulation areas, particle spacing, array angles, distribution patterns, and node rotation. This device allows selective particle manipulation across entire regions or specific areas through adaptive adjustments of the microchamber boundary. Notably, the ORAT achieves rapid and accurate localization and labeling of rare tumor cells within a large population of normal cells. Furthermore, it enhances the sensitivity of CRISPR/Cas-based miRNA detection in digital microdroplets by three orders of magnitude, if compared to that of the conventional tube-based method. With its versatile capabilities, the ORAT holds remarkable promise for advancing nucleic acid analysis in a wide range of cancers and related diseases.