High-throughput bioprinting of spheroids for scalable tissue fabrication

作者：Myoung Hwan Kim, Yogendra Pratap Singh, Nazmiye Celik, Miji Yeo, Elias Rizk, Daniel J. Hayes, İbrahim T. Özbolat · 发表于：Nature Communications · 年份：2024 · DOI：10.1038/s41467-024-54504-7 · 被引用次数：70 · 研究领域：3D Printing in Biomedical Research、Additive Manufacturing and 3D Printing Technologies、Pluripotent Stem Cells Research

Tissue biofabrication mimicking organ-specific architecture and function requires physiologically-relevant cell densities. Bioprinting using spheroids can achieve this, but is limited due to the lack of practical, scalable techniques. This study presents HITS-Bio (High-throughput Integrated Tissue Fabrication System for Bioprinting), a multiarray bioprinting technique for rapidly positioning multiple spheroids simultaneously using a digitally-controlled nozzle array (DCNA). HITS-Bio achieves an unprecedented speed, ten times faster compared to existing techniques while maintaining high cell viability ( > 90%). The utility of HITS-Bio was exemplified in multiple applications, including intraoperative bioprinting with microRNA transfected human adipose-derived stem cell spheroids for calvarial bone regeneration ( ~ 30 mm3) in a rat model achieving a near-complete defect closure (bone coverage area of ~ 91% in 3 weeks and ~96% in 6 weeks). Additionally, the successful fabrication of scalable cartilage constructs (1 cm3) containing ~600 chondrogenic spheroids highlights its high-throughput efficiency (under 40 min per construct) and potential for repairing volumetric defects. HITS-Bio, a high-throughput bioprinting platform, rapidly assembles spheroids to mimic native tissue architecture. Its intraoperative application in bone shows near-complete calvarial defect repair in rats and fabrication of scalable cartilage.