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Wang X, Li X, Gu N, Shao Y, Guo Y, Deng Y, Chu C, Xue F, Huang L, Tao L, Bai J. pH-responsive, self-sculptured Mg/PLGA composite microfibers for accelerated revascularization and soft tissue regeneration. BIOMATERIALS ADVANCES 2024; 158:213767. [PMID: 38227990 DOI: 10.1016/j.bioadv.2024.213767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 09/25/2023] [Accepted: 01/08/2024] [Indexed: 01/18/2024]
Abstract
Biodegradable Mg/polymer composite fibers offer a promising therapeutic option for tissue injury because of bioactive Mg2+ and biomimetic microstructure. However, current studies are limited to the contribution of Mg2+ and the single microstructure. In this study, we designed Mg/poly (lactic-co-glycolic acid) (Mg/PLGA) composite microfibers that significantly enhanced angiogenesis and tissue regeneration synergistically by Mg2+ and self-sculptured microstructure, due to spontaneous in situ microphase separation in response to the weakly alkaline microenvironment. Our composite microfiber patch exhibited superior performance in the adhesion, spreading, and angiogenesis functions of human umbilical vein endothelial cells (HUVECs) due to the joint contribution of the hierarchically porous microstructure and Mg2+. Genomics and proteomics analyses revealed that the Mg/PLGA composite microfibers activated the cell focal adhesion and angiogenesis-related signaling pathways. Furthermore, the repair of typical soft tissue defects, including refractory urethral wounds and easily healed skin wounds, validated that our Mg/PLGA composite microfiber patch could provide favorable surface topography and ions microenvironment for tissue infiltration and accelerated revascularization. It could cause rapid urethral tissue regeneration and recovery of rabbit urethral function within 6 weeks and accelerate rat skin wound closure within 16 days. This work provides new insight into soft tissue regeneration through the bioactive alkaline substance/block copolymer composites interactions.
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Affiliation(s)
- Xianli Wang
- School of Materials Science and Engineering, Southeast University, Jiangning, Nanjing 211189, Jiangsu, China; Jiangsu Key Laboratory for Advanced Metallic Materials, Jiangning, Nanjing 211189, Jiangsu, China
| | - Xiaoyu Li
- Department of Urology, Children's Hospital of Nanjing Medical University, 72 Guangzhou Road, Nanjing 210008, Jiangsu, China
| | - Nannan Gu
- Department of Urology, Children's Hospital of Nanjing Medical University, 72 Guangzhou Road, Nanjing 210008, Jiangsu, China
| | - Yi Shao
- School of Materials Science and Engineering, Southeast University, Jiangning, Nanjing 211189, Jiangsu, China; Jiangsu Key Laboratory for Advanced Metallic Materials, Jiangning, Nanjing 211189, Jiangsu, China; Institute of Medical Devices (Suzhou), Southeast University, Suzhou 215000, China
| | - Yunfei Guo
- Department of Urology, Children's Hospital of Nanjing Medical University, 72 Guangzhou Road, Nanjing 210008, Jiangsu, China
| | - Yongji Deng
- Department of Urology, Children's Hospital of Nanjing Medical University, 72 Guangzhou Road, Nanjing 210008, Jiangsu, China
| | - Chenglin Chu
- School of Materials Science and Engineering, Southeast University, Jiangning, Nanjing 211189, Jiangsu, China; Jiangsu Key Laboratory for Advanced Metallic Materials, Jiangning, Nanjing 211189, Jiangsu, China
| | - Feng Xue
- School of Materials Science and Engineering, Southeast University, Jiangning, Nanjing 211189, Jiangsu, China; Jiangsu Key Laboratory for Advanced Metallic Materials, Jiangning, Nanjing 211189, Jiangsu, China
| | - Liqu Huang
- Department of Urology, Children's Hospital of Nanjing Medical University, 72 Guangzhou Road, Nanjing 210008, Jiangsu, China.
| | - Li Tao
- School of Materials Science and Engineering, Southeast University, Jiangning, Nanjing 211189, Jiangsu, China; Jiangsu Key Laboratory for Advanced Metallic Materials, Jiangning, Nanjing 211189, Jiangsu, China.
| | - Jing Bai
- School of Materials Science and Engineering, Southeast University, Jiangning, Nanjing 211189, Jiangsu, China; Jiangsu Key Laboratory for Advanced Metallic Materials, Jiangning, Nanjing 211189, Jiangsu, China; Institute of Medical Devices (Suzhou), Southeast University, Suzhou 215000, China.
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Imashiro C, Mei J, Friend J, Takemura K. Quantifying cell adhesion through forces generated by acoustic streaming. ULTRASONICS SONOCHEMISTRY 2022; 90:106204. [PMID: 36257212 PMCID: PMC9583098 DOI: 10.1016/j.ultsonch.2022.106204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Revised: 09/01/2022] [Accepted: 10/12/2022] [Indexed: 06/16/2023]
Abstract
The strength of cell adhesion is important in understanding the cell's health and in culturing them. Quantitative measurement of cell adhesion strength is a significant challenge in bioengineering research. For this, the present study describes a system that can measure cell adhesion strength using acoustic streaming induced by Lamb waves. Cells are cultured on an ultrasound transducer using a range of preculture and incubation times with phosphate-buffered saline (PBS) just before the measurement. Acoustic streaming is then induced using several Lamb wave intensities, exposing the cells to shear flows and eventually detaching them. By relying upon a median detachment rate of 50 %, the corresponding detachment force, or force of cell adhesion, was determined to be on the order of several nN, consistent with previous reports. The stronger the induced shear flow, the more cells were detached. Further, we employed a preculture time of 8 to 24 h and a PBS incubation time of 0 to 60 min, producing cell adhesion forces that varied from 1.2 to 13 nN. Hence, the developed system can quantify cell adhesion strength over a wide range, possibly offering a fundamental tool for cell-based bioengineering.
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Affiliation(s)
- Chikahiro Imashiro
- Institute of Advanced Biomedical Engineering and Science, Tokyo Women's Medical University, 8-1 Kawada-cho, Shinjuku-ku, Tokyo 162-8666, Japan; Department of Mechanical Engineering, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan.
| | - Jiyang Mei
- Medically Advanced Devices Laboratory, Center for Medical Devices, Department of Mechanical and Aerospace Engineering, Jacobs School of Engineering and Department of Surgery, School of Medicine, University of California, San Diego, CA 92093, USA
| | - James Friend
- Medically Advanced Devices Laboratory, Center for Medical Devices, Department of Mechanical and Aerospace Engineering, Jacobs School of Engineering and Department of Surgery, School of Medicine, University of California, San Diego, CA 92093, USA
| | - Kenjiro Takemura
- Department of Mechanical Engineering, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
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Zhu M, Zhang R, Mao Z, Fang J, Ren F. Topographical biointerface regulating cellular functions for bone tissue engineering. BIOSURFACE AND BIOTRIBOLOGY 2022. [DOI: 10.1049/bsb2.12043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Mingyu Zhu
- Department of Materials Science and Engineering Southern University of Science and Technology Shenzhen Guangdong China
| | - Rui Zhang
- Department of Prosthodontics Stomatology Center Peking University Shenzhen Hospital Shenzhen Guangdong China
| | - Zhixiang Mao
- Department of Materials Science and Engineering Southern University of Science and Technology Shenzhen Guangdong China
| | - Ju Fang
- Department of Materials Science and Engineering Southern University of Science and Technology Shenzhen Guangdong China
| | - Fuzeng Ren
- Department of Materials Science and Engineering Southern University of Science and Technology Shenzhen Guangdong China
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