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Yang Q, Tang S, Lu D, Li Y, Wan F, Li J, Chen Q, Cong Z, Zhang X, Wu S. Pollen Typhae-Based Magnetic-Powered Microrobots toward Acute Gastric Bleeding Treatment. ACS APPLIED BIO MATERIALS 2022; 5:4425-4434. [PMID: 35969274 DOI: 10.1021/acsabm.2c00565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Traditional Chinese herbal medicine (TCHM) is the naturally available pharmaceutical with millennia of evolution from ancient China, capable of a superior therapeutic index and minimized unwanted effects on the human body. This work presents a therapeutic microrobotic platform based on pollen typhae (PT), a typical type of TCHM, fabricated by coating porous PT microspheres with Fe3O4 nanoparticles (PT robots) via electrostatic adsorption. The PT robots exhibit effective and controllable motion in various biological media upon external magnetic control and, meanwhile, preserve the inherent hemostasis property of PT. The blood clotting capacity of PT robots is attributed to their stimulation of the endogenous blood coagulation pathway and platelets with increased counts, which could be further improved by their effective magnetic propulsion. The remote magnetic control also allows the manipulation of PT robots in mice stomach, inducing enhanced binding and prolonged retention of PT robots in stomach mucosa. Moreover, PT robots upon magnetic control show an enhanced hemostatic effect in treating the mice bearing acute gastric bleeding compared with other passive groups. This work offers a facile and feasible route to integrate TCHM with manmade micromachines possessing the innate curative features of TCHM. Such a design expanded the versatility of microrobots and can be generalized to vast types of TCHM for broader biomedical applications.
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Affiliation(s)
- Qingxin Yang
- Institute of Urology, The Third Affiliated Hospital of Shenzhen University, Luohu Hospital Group, Shenzhen 518000, P. R. China
| | - Songsong Tang
- Institute of Urology, The Third Affiliated Hospital of Shenzhen University, Luohu Hospital Group, Shenzhen 518000, P. R. China
| | - Dongdong Lu
- Institute of Urology, The Third Affiliated Hospital of Shenzhen University, Luohu Hospital Group, Shenzhen 518000, P. R. China
| | - Yangyang Li
- Institute of Urology, The Third Affiliated Hospital of Shenzhen University, Luohu Hospital Group, Shenzhen 518000, P. R. China
| | - Fangchen Wan
- Institute of Urology, The Third Affiliated Hospital of Shenzhen University, Luohu Hospital Group, Shenzhen 518000, P. R. China
| | - Jiahong Li
- Andrew and Peggy Cherng Department of Medical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Qiwei Chen
- Institute of Urology, The Third Affiliated Hospital of Shenzhen University, Luohu Hospital Group, Shenzhen 518000, P. R. China
| | - Zhaoqing Cong
- Institute of Urology, The Third Affiliated Hospital of Shenzhen University, Luohu Hospital Group, Shenzhen 518000, P. R. China
| | - Xueji Zhang
- School of Biomedical Engineering, Health Science Center, Shenzhen University, Shenzhen 518060, P. R. China
| | - Song Wu
- Institute of Urology, The Third Affiliated Hospital of Shenzhen University, Luohu Hospital Group, Shenzhen 518000, P. R. China
- South China Hospital, Shenzhen University, Shenzhen 518116, P. R. China
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