Self-buoyant cell-spheroid culture programming multi-spheroid assembly.

Self-buoyant cell spheroids can be rapidly assembled and manipulated using microbubbles, enabling high-throughput, field-free tissue-like structure formation with ultrafast transfer times of about 1 second.

• Why it matters: Efficient, scalable control over spheroid assembly is crucial for advancing tissue engineering, drug screening, and precision medicine, yet current methods face technical limitations in speed and complexity.
• What they did: The study developed a one-step, biocompatible, self-floating spheroid microarray system utilizing microbubbles to induce buoyancy, allowing programmable assembly, rapid transfer, and fusion of multiple spheroids without external fields.
• The result: This approach enables mass production and smart manipulation of complex spheroid patterns, facilitating applications in tissue engineering, high-throughput drug testing, and personalized medicine through efficient, programmable bioassembly.