PMID- 31159427 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20231012 IS - 2072-666X (Print) IS - 2072-666X (Electronic) IS - 2072-666X (Linking) VI - 10 IP - 6 DP - 2019 Jun 1 TI - Magnetic Micromachine Using Nickel Nanoparticles for Propelling and Releasing in Indirect Assembly of Cell-Laden Micromodules. LID - 10.3390/mi10060370 [doi] LID - 370 AB - Magnetic micromachines as wireless end-effectors have been widely applied for drug discovery and regenerative medicine. Yet, the magnetic assembly of arbitrarily shaped cellular microstructures with high efficiency and flexibility still remains a big challenge. Here, a novel clamp-shape micromachine using magnetic nanoparticles was developed for the indirect untethered bioassembly. With a multi-layer template, the nickel nanoparticles were mixed with polydimethylsiloxane (PDMS) for mold replication of the micromachine with a high-resolution and permeability. To actuate the micromachine with a high flexibility and large scalable operation range, a multi-pole electromagnetic system was set up to generate a three-dimensional magnetic field in a large workspace. Through designing a series of flexible translations and rotations with a velocity of 15mm/s and 3 Hz, the micromachine realized the propel-and-throw strategy to overcome the inevitable adhesion during bioassembly. The hydrogel microstructures loaded with different types of cells or the bioactive materials were effectively assembled into microtissues with reconfigurable shape and composition. The results indicate that indirect magnetic manipulation can perform an efficient and versatile bioassembly of cellular micromodules, which is promising for drug trials and modular tissue engineering. FAU - Li, Jianing AU - Li J AD - Intelligent Robotics Institute, School of Mechatronical Engineering, Beijing Institute of Technology, 5 South Zhongguancun Street, Haidian District, Beijing 100081, China. 2120170179@bit.edu.cn. FAU - Wang, Huaping AU - Wang H AUID- ORCID: 0000-0001-8440-3402 AD - Intelligent Robotics Institute, School of Mechatronical Engineering, Beijing Institute of Technology, 5 South Zhongguancun Street, Haidian District, Beijing 100081, China. wanghuaping@bit.edu.cn. FAU - Cui, Juan AU - Cui J AD - Intelligent Robotics Institute, School of Mechatronical Engineering, Beijing Institute of Technology, 5 South Zhongguancun Street, Haidian District, Beijing 100081, China. cuijuan2016@bit.edu.cn. FAU - Shi, Qing AU - Shi Q AD - Intelligent Robotics Institute, School of Mechatronical Engineering, Beijing Institute of Technology, 5 South Zhongguancun Street, Haidian District, Beijing 100081, China. shiqing@bit.edu.cn. FAU - Zheng, Zhiqiang AU - Zheng Z AD - Intelligent Robotics Institute, School of Mechatronical Engineering, Beijing Institute of Technology, 5 South Zhongguancun Street, Haidian District, Beijing 100081, China. zzqyouyou@sina.com. FAU - Sun, Tao AU - Sun T AD - Intelligent Robotics Institute, School of Mechatronical Engineering, Beijing Institute of Technology, 5 South Zhongguancun Street, Haidian District, Beijing 100081, China. 3120120061@bit.edu.cn. FAU - Huang, Qiang AU - Huang Q AD - Intelligent Robotics Institute, School of Mechatronical Engineering, Beijing Institute of Technology, 5 South Zhongguancun Street, Haidian District, Beijing 100081, China. qhuang@bit.edu.cn. FAU - Fukuda, Toshio AU - Fukuda T AD - Intelligent Robotics Institute, School of Mechatronical Engineering, Beijing Institute of Technology, 5 South Zhongguancun Street, Haidian District, Beijing 100081, China. tofukuda@nifty.com. LA - eng GR - Z181100003118007/Beijing Municipal Science and Technology Commission/ GR - 2017YFE0117000./National Key R&D Program of China/ PT - Journal Article DEP - 20190601 PL - Switzerland TA - Micromachines (Basel) JT - Micromachines JID - 101640903 PMC - PMC6631220 OTO - NOTNLM OT - bioassembly OT - magnetic manipulation OT - magnetic nanoparticles OT - tissue engineering COIS- The authors declare no conflict of interest. EDAT- 2019/06/05 06:00 MHDA- 2019/06/05 06:01 PMCR- 2019/06/01 CRDT- 2019/06/05 06:00 PHST- 2019/05/06 00:00 [received] PHST- 2019/05/23 00:00 [revised] PHST- 2019/05/28 00:00 [accepted] PHST- 2019/06/05 06:00 [entrez] PHST- 2019/06/05 06:00 [pubmed] PHST- 2019/06/05 06:01 [medline] PHST- 2019/06/01 00:00 [pmc-release] AID - mi10060370 [pii] AID - micromachines-10-00370 [pii] AID - 10.3390/mi10060370 [doi] PST - epublish SO - Micromachines (Basel). 2019 Jun 1;10(6):370. doi: 10.3390/mi10060370.