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Zhao X, Yao H, Lv Y, Chen Z, Dong L, Huang J, Mi S. Reprogrammable Magnetic Soft Actuators with Microfluidic Functional Modules via Pixel-Assembly. Small 2024:e2310009. [PMID: 38295155 DOI: 10.1002/smll.202310009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Revised: 12/31/2023] [Indexed: 02/02/2024]
Abstract
Magnetic soft actuators and robots have attracted considerable attention in biomedical applications due to their speedy response, programmability, and biocompatibility. Despite recent advancements, the fabrication process of magnetic actuators and the reprogramming approach of their magnetization profiles continue to pose challenges. Here, a facile fabrication strategy is reported based on arrangements and distributions of reusable magnetic pixels on silicone substrates, allowing for various magnetic actuators with customizable architectures, arbitrary magnetization profiles, and integration of microfluidic technology. This approach enables intricate configurations with decent deformability and programmability, as well as biomimetic movements involving grasping, swimming, and wriggling in response to magnetic actuation. Moreover, microfluidic functional modules are integrated for various purposes, such as on/off valve control, curvature adjustment, fluid mixing, dynamic microfluidic architecture, and liquid delivery robot. The proposed method fulfills the requirements of low-cost, rapid, and simplified preparation of magnetic actuators, since it eliminates the need to sustain pre-defined deformations during the magnetization process or to employ laser heating or other stimulation for reprogramming the magnetization profile. Consequently, it is envisioned that magnetic actuators fabricated via pixel-assembly will have broad prospects in microfluidics and biomedical applications.
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Affiliation(s)
- Xiaoyu Zhao
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, Guangdong, 518000, China
| | - Hongyi Yao
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, Guangdong, 518000, China
| | - Yaoyi Lv
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, Guangdong, 518000, China
| | - Zhixian Chen
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, Guangdong, 518000, China
| | - Lina Dong
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, Guangdong, 518000, China
| | - Jiajun Huang
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, Guangdong, 518000, China
- Optometry Advanced Medical Equipment R&D Center, Research Institute of Tsinghua University in Shenzhen, Shenzhen, Guangdong, 518000, China
| | - Shengli Mi
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, Guangdong, 518000, China
- Optometry Advanced Medical Equipment R&D Center, Research Institute of Tsinghua University in Shenzhen, Shenzhen, Guangdong, 518000, China
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2
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Dong Y, Chen B, Cai G, Xu F, Li L, Cheng X, Shi X, Peng B, Mi S. Integrated nucleic acid purification technology based on amino-modified centrifugal microfluidic chip. Biotechnol J 2024; 19:e2300113. [PMID: 38050772 DOI: 10.1002/biot.202300113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Revised: 11/27/2023] [Accepted: 12/01/2023] [Indexed: 12/06/2023]
Abstract
Nucleic acid detection is an important tool for clinical diagnosis. The purification of the sample is the most time-consuming step in the nucleic acid testing process and will affect the results of the assay. Here, we developed a surface modification-based nucleic acid purification method and designed an accompanying set of centrifugation equipment and chips to integrate the steps of nucleic acid purification on a single platform. The results of experiments with HeLa cells and HPV type 16 as samples showed that the mentioned method had good nucleic acid purification capability and the accompanying equipment greatly simplified the operation of the experimenters in the whole process. Overall, our equipment can improve the efficiency of nucleic acid purification and is suitable for application in larger-scale clinical assays.
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Affiliation(s)
- Yongkang Dong
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, China
| | - Bailiang Chen
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, China
| | - Gangpei Cai
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, China
| | - Fei Xu
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, China
| | - Linzhi Li
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, China
| | - Xiaoqi Cheng
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, China
| | - Xiaolu Shi
- Microbiology Laboratory, Shenzhen Center for Disease Control and Prevention, Shenzhen, Guangdong, China
| | - Bo Peng
- Microbiology Laboratory, Shenzhen Center for Disease Control and Prevention, Shenzhen, Guangdong, China
| | - Shengli Mi
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, China
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3
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Du Z, Yang S, Gong Q, Lin Z, Xiao G, Mi S. Research of restricted migration evaluation of MDA-MB-231 cells in 2D and 3D co-culture models. Exp Biol Med (Maywood) 2023; 248:2219-2226. [PMID: 38240216 PMCID: PMC10903235 DOI: 10.1177/15353702231214269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2023] [Accepted: 09/01/2023] [Indexed: 01/23/2024] Open
Abstract
The restricted migration evaluation is conducive to more complex tumor migration research because of the conformity with in vivo tumors. However, the differences between restricted and unrestricted cell migration and the distinction between different evaluation methods have not been systematically studied, hindering related research. In this study, by constructing the restricted environments on chips, the influence of co-culture conditions on the cancer cell migration capacity was studied. The results showed that the restricted channels can discriminate the influence of weak tumor environmental factors on complex tumor migration behaviors by limiting the free growth instinct of tumor cells. Through the comparison of 2D and 3D restricted migration methods, the extracellular matrix (ECM) restriction was also helpful in distinguishing the influence of the weak tumor environmental factor. However, the 3D ECM can better reflect the tortuosity of the cell migration process and the cooperative behavior among cancer cells. In the anticancer drug evaluation, 3D ECM can more accurately reflect the cytotoxicity of drugs and is more consistent with the drug resistance in the human body. In conclusion, the research will help to distinguish different evaluation methods of cancer cell migration, help researchers select appropriate evaluation models, and promote the research of tumor metastasis.
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Affiliation(s)
- Zhichang Du
- College of Marine Equipment and Mechanical Engineering, Jimei University, Xiamen 361021, China
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
| | - Shaohui Yang
- College of Marine Equipment and Mechanical Engineering, Jimei University, Xiamen 361021, China
- Key Laboratory of Ocean Renewable Energy Equipment of Fujian Province, Jimei University, Xiamen 361021, China
| | - Qingzhong Gong
- College of Marine Equipment and Mechanical Engineering, Jimei University, Xiamen 361021, China
| | - Zhonghua Lin
- College of Marine Equipment and Mechanical Engineering, Jimei University, Xiamen 361021, China
| | - Guohong Xiao
- College of Marine Equipment and Mechanical Engineering, Jimei University, Xiamen 361021, China
| | - Shengli Mi
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
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4
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Yao H, Zhao X, Mi S. Modular design of curved beam-based recyclable architected materials. Heliyon 2023; 9:e21557. [PMID: 38053863 PMCID: PMC10694173 DOI: 10.1016/j.heliyon.2023.e21557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 10/02/2023] [Accepted: 10/24/2023] [Indexed: 12/07/2023] Open
Abstract
Advances in manufacturing technologies have enabled architected materials with unprecedented properties. These materials are typically irreversibly designed and fabricated with characteristic geometries and specific mechanical properties, thus rendering them suitable for pre-specified requests. However, these materials cannot be recycled or reconstructed into different shapes and functionalities to economically adapt to various environments. Hence, we present a modular design strategy to create a category of recyclable architected materials comprising elastic initially curved beams and rigid cylindrical magnets. Based on numerical analyses and physical prototypes, we introduce an arc-serpentine curved beam (ASCB) and systematically investigate its mechanical properties. Subsequently, we develop two sets of hierarchical modules for the ASCB, thus expanding the constructable shape of architected materials from regular cuboids to complex curved surfaces. Furthermore, we demonstrate that the magnets attached to the centers of specific serpentine patterns of the modules allows the effective in-situ recycling of the designed materials, including sheet materials for non-damage storage, bulk materials for tunable stiffness, and protective package boxes for reshaping into decorative lampshades. We expect our approach to improve the flexibility of architected materials for multifunctional implementation in resource-limited scenarios.
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Affiliation(s)
- Hongyi Yao
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, China
- Department of Mechanical Engineering, Tsinghua University, Beijing, China
| | - Xiaoyu Zhao
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, China
| | - Shengli Mi
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, China
- Department of Mechanical Engineering, Tsinghua University, Beijing, China
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Li M, Wu Y, Yuan T, Su H, Qin M, Yang X, Mi S. Biofabrication of Composite Tendon Constructs with the Fibrous Arrangement, High Cell Density, and Enhanced Cell Alignment. ACS Appl Mater Interfaces 2023; 15:47989-48000. [PMID: 37796904 DOI: 10.1021/acsami.3c10697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/07/2023]
Abstract
Current tissue-engineered tendons are mostly limited to the replication of fibrous organizations of native tendons, which lack the biomimicry of a densely packed cell arrangement. In this study, composite tendon constructs (CTCs) with fibrous arrangement, high cell density, and enhanced cell alignment were developed by integrating the electrohydrodynamic jet 3D printing (e-jetting) technique and the fabrication of tissue strands (TSs). A tubular polycaprolactone (PCL) scaffold was created using e-jetting, followed by coating a thin layer of alginate. Human mesenchymal stem cells were then microinjected into the PCL scaffolds, aggregated into TSs, and formed CTCs with a core-shell structure. Owing to the presence of TSs, CTCs demonstrated the anatomically relevant cell density and morphology, and cells migrated from the TSs onto e-jetted scaffolds. Also, the mechanical strength of CTCs approached that of native tendons due to the existence of e-jetted scaffolds (Young's modulus: ∼21 MPa, ultimate strength: ∼5 MPa). During the entire culture period, CTCs maintained high survival rates and good structural integrity without the observation of necrotic cores and disintegration of two portions. In addition, CTCs that were cultured with uniaxial cyclic stretching revealed not only the increased expression of tendon-related proteins but also the enhanced cellular orientation. The promising results demonstrated the potential of this novel biofabrication strategy for building tissue-engineered tendon constructs with the proper biological, mechanical, and histological relevance..
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Affiliation(s)
- Ming Li
- School of Mechanical Engineering and Automation, Harbin Institute of Technology, Shenzhen 518055, China
| | - Yang Wu
- School of Mechanical Engineering and Automation, Harbin Institute of Technology, Shenzhen 518055, China
| | - Tianying Yuan
- Biomanufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Shenzhen 518055, China
| | - Hao Su
- School of Mechanical Engineering and Automation, Harbin Institute of Technology, Shenzhen 518055, China
| | - Minghao Qin
- School of Mechanical Engineering and Automation, Harbin Institute of Technology, Shenzhen 518055, China
| | - Xue Yang
- School of Mechanical Engineering and Automation, Harbin Institute of Technology, Shenzhen 518055, China
| | - Shengli Mi
- Biomanufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Shenzhen 518055, China
- Open FIESTA Center, Tsinghua Shenzhen International Graduate School, Shenzhen 518055, China
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6
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Liang M, Dong L, Guo Z, Liu L, Fan Z, Wei C, Mi S, Sun W. Collagen-Hyaluronic Acid Composite Hydrogels with Applications for Chronic Diabetic Wound Repair. ACS Biomater Sci Eng 2023; 9:5376-5388. [PMID: 37596956 DOI: 10.1021/acsbiomaterials.3c00695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/21/2023]
Abstract
Chronic diabetic wounds have become a major healthcare challenge worldwide. Improper treatment may lead to serious complications. Current treatment methods including biological and physical methods and skin grafting have limitations and disadvantages, such as poor efficacy, inconvenience of use, and high cost. Therefore, developing a more effective and feasible treatment is of great significance for the repair of chronic diabetic wounds. Hydrogels can be designed to serve multiple functions to promote the repair of chronic diabetic wounds. Furthermore, 3D bioprinting enables hydrogel customization to fit chronic diabetic wounds, thus facilitating the healing process. This paper reports a study of 3D printing of a collagen-hyaluronic acid composite hydrogels with application for chronic diabetic wound repair. In situ printed hydrogels were developed by a macromolecular crosslinking network using methacrylated recombinant human collagen (RHCMA) and methacrylated hyaluronic acid (HAMA), both of which can respond to ultraviolet (UV) irradiation. The hydrogels were also loaded with silver nanoclusters (AgNCs) with ultra-small-size nanoparticles, which have the advantages of deep penetration ability and broad-spectrum high-efficiency antibacterial properties. The results of this study show that the developed RHCMA, HAMA, and AgNCs (RHAg) composite hydrogels present good UV responsiveness, porosity, mechanical properties, printability, and biocompatibility, all of which are beneficial to wound healing. The results of this study further show that the developed RHAg hydrogels not only effectively inhibited Staphylococcus aureus and Pseudomonas aeruginosa but also promoted the proliferation and migration of fibroblasts in vitro and tissue regeneration and collagen deposition in vivo, thus producing a desirable wound repair effect and can be used as an effective functional biomaterial to promote chronic diabetic wound repair.
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Affiliation(s)
- Mujiao Liang
- Tsinghua-Berkeley Shenzhen Institute, Tsinghua University, Shenzhen 518055, China
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
| | - Lina Dong
- Tsinghua-Berkeley Shenzhen Institute, Tsinghua University, Shenzhen 518055, China
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
| | - Zhongwei Guo
- School of Mechanics and Safety Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Liming Liu
- Pathology Department, Shenzhen People's Hospital, Shenzhen 518020, China
| | - Zixin Fan
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
- Jinan University, Shenzhen Eye Institute, Shenzhen Eye Hospital, Shenzhen 518040, China
| | - Cunyue Wei
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
| | - Shengli Mi
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
| | - Wei Sun
- Tsinghua-Berkeley Shenzhen Institute, Tsinghua University, Shenzhen 518055, China
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
- Department of Mechanical Engineering, Biomanufacturing Center, Tsinghua University, Beijing 100084, China
- Department of Mechanical Engineering, Drexel University, Philadelphia, Pennsylvania 19104, United States
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Cai G, Huang Y, Chen B, Shen Y, Shi X, Peng B, Mi S, Huang J. Modular design of centrifugal microfluidic system and its application in nucleic acid screening. Talanta 2023; 259:124486. [PMID: 37060723 DOI: 10.1016/j.talanta.2023.124486] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 03/22/2023] [Accepted: 03/24/2023] [Indexed: 04/17/2023]
Abstract
Modular integration of functional components on the chip and increasement in control accuracy through real-time alteration in the force direction of droplets is an effective way to optimize centrifugal microfluidic systems and realize passive components, compact modules, and high-throughput control. Conventional centrifugal microfluidic chips are mainly driven and controlled by centrifugal force and Euler force. The control valves are easily affected by machining precision, making the control unstable. In this study, a novel centrifugal microfluidic system is introduced to improve the freedom and accuracy of chip control while facilitating the design and addition of passive functional components. Furthermore, we modularize the centrifugal microfluidic chip to greatly shorten the period of design and optimization cycle and achieve chip reusability and multi-threaded control. Finally, to verify the feasibility of the modular centrifugal microfluidic chip applied to high-throughput nucleic acid screening, we test the nucleic acid purification and detection colorimetric reactions based on the modular centrifugal microfluidic chip. Among them, Chelex-100 is used to realize the purification of nucleic acid in cell lysate, and the purified solution can realize amplification in the PCR instrument, and the nucleic acid detection results are consistent with the off-chip kit by experimental testing. The system has great flexibility and stability under the acceptable purity of nucleic acid, which indicates that the platform has great potential for large-scale rapid screening applications.
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Affiliation(s)
- Gangpei Cai
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, Guangdong, China; Shenzhen Disiontech Bio-Meditech Co., Ltd., Shenzhen, 518055, Guangdong, China
| | - Yuxin Huang
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, Guangdong, China
| | - Bailiang Chen
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, Guangdong, China
| | - Yuemin Shen
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, Guangdong, China
| | - Xiaolu Shi
- Microbiology Laboratory, Shenzhen Center for Disease Control and Prevention, Nanshan District, Shenzhen, 518055, Guangdong, China
| | - Bo Peng
- Microbiology Laboratory, Shenzhen Center for Disease Control and Prevention, Nanshan District, Shenzhen, 518055, Guangdong, China
| | - Shengli Mi
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, Guangdong, China; Research Institute of Tsinghua University in Shenzhen, Nanshan District, Shenzhen, China.
| | - Jiajun Huang
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, Guangdong, China; Research Institute of Tsinghua University in Shenzhen, Nanshan District, Shenzhen, China; Shenzhen Disiontech Bio-Meditech Co., Ltd., Shenzhen, 518055, Guangdong, China.
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Ji J, Zhao X, Huang J, Wu X, Xie F, Li L, Wang T, Mi S. Apolipoprotein A-IV of diabetic-foot patients upregulates tumor necrosis factor α expression in microfluidic arterial models. Exp Biol Med (Maywood) 2023; 248:691-701. [PMID: 36775868 PMCID: PMC10408548 DOI: 10.1177/15353702221147562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Accepted: 11/21/2022] [Indexed: 02/14/2023] Open
Abstract
Diabetic peripheral arterial atherosclerosis is one of the important characteristics of diabetic foot syndrome. Apolipoprotein (Apo A-IV) participates in various physiological processes, and animal studies have shown that it has roles of anti-atherosclerosis, prevention of platelet aggregation and thrombosis. Apo A-IV glycosylation is closely related to the occurrence and development of diabetic peripheral atherosclerosis. This study aimed to explore the mechanism of diabetic peripheral arterial lesions caused by glycosylated Apo A-IV. Type 2 diabetes mellitus (T2DM) and T2DM with diabetic foot patients (T2DM-F; n = 45, 30) were enrolled in this study, and individuals without diabetes (n = 35) served as normal controls (NC). In T2DM group, serum Apo A-IV content was higher than those in NC and T2DM-F group, as carboxymethyl lysine (CML) glycosylation of Apo A-IV in mixed serum from T2DM-F group was identified to be more significant than those in two other groups. Within a microfluidic arterial chip model, Apo A-IV from T2DM and T2DM-F group significantly increased transcription and protein levels of tumor necrosis factor alpha (TNF-α) in chip arteries, and CML expression was observed in T2DM-F group, which were associated with increased nuclear receptor subfamily 4 group A member 3 (NR4A3) expression. Recombinant human Apo A-IV could reverse the stimulating effect of serum Apo A-IV from T2DM-F group on TNF-α expression, and NR4A3 blocking peptide downregulated TNF-α expression by inhibiting NR4A3 expression. In the chip arteries, Apo A-IV from T2DM and T2DM-F increased TNF-α expression and turn them into a pre-atherosclerotic state, which might be one of the important mechanisms of glycosylated Apo A-IV to induce diabetic peripheral arterial lesions and eventually lead to diabetic foot.
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Affiliation(s)
- Jun Ji
- Department of Cardiovascular Surgery, University of Chinese Academy of Science Shenzhen Hospital, Shenzhen 518027, China
| | - Xiaoyu Zhao
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055 China
| | - Jiajun Huang
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055 China
| | - Xuanqin Wu
- Department of Cardiovascular Surgery, University of Chinese Academy of Science Shenzhen Hospital, Shenzhen 518027, China
| | - Fang Xie
- Department of Endocrinology, University of Chinese Academy of Science Shenzhen Hospital, Shenzhen 518027, China
| | - Liang Li
- Department of Cardiovascular Surgery, University of Chinese Academy of Science Shenzhen Hospital, Shenzhen 518027, China
| | - Tao Wang
- Department of Cardiovascular Surgery, University of Chinese Academy of Science Shenzhen Hospital, Shenzhen 518027, China
| | - Shengli Mi
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055 China
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Li L, Yao H, Mi S. Magnetically Driven Modular Mechanical Metamaterials with High Programmability, Reconfigurability, and Multiple Applications. ACS Appl Mater Interfaces 2023; 15:3486-3496. [PMID: 36598348 DOI: 10.1021/acsami.2c19679] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Shape transformation and motion guidance are emerging research hotspots of mechanical metamaterials. In this case, the key issue is how to improve the programmability and reconfigurability of metamaterials. The magnetically driven method enables materials to accomplish remote, fast, and reversible deformation, so it is desired for improving the programmability and reconfigurability of metamaterials. However, conventional magnetically driven materials are often pure elastomer materials. Their magnetic programming method is single, and their overall shape is unchangeable after fabrication, which limits their programmability and reconfigurability. Herein, this article proposes a kind of magnetically driven, programmable, and reconfigurable modular mechanical metamaterial based on origami and kirigami design mechanisms. The motion and deformation were designed to follow the predefined creases and incisions that could be transformed into each other. This metamaterial enabled more discrete motion and force transmission and integrated the fold of origami, the rotation of kirigami, and the fold guided by cuts. Such designs laid the foundation for complex, three-dimensional structures which could be quickly reassembled and constructed to deal with complex situations. This paper also demonstrated applications of this metamaterial in information storage and manifestation, mechanical logic computing, reconfigurable robotics, deployable mechanisms, and so on. The results indicated that the high programmability and reconfigurability expanded the application potential of the metamaterial for broader needs.
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Affiliation(s)
- Linzhi Li
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen518000, China
| | - Hongyi Yao
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen518000, China
| | - Shengli Mi
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen518000, China
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10
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Cai G, Xu F, Chen B, Li X, Huang J, Mi S. Variable-position centrifugal platform achieves droplet manipulation and logic circuitries on-chip. Lab Chip 2023; 23:349-361. [PMID: 36606538 DOI: 10.1039/d2lc00761d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Taking information as material to realize non-electronic physical computing is a promising idea, which facilitates the integration of technologies in different fields such as chemistry, biology, and mechanical control into a new computing platform. Here, we propose a novel, efficient and robust manipulation platform that drives droplet computing by way of inertial force. Combining this with droplet flow path design, we demonstrated multiple basic functions of droplet manipulation, including storage, dosing, interrupts, controllable release and addressing. These basic functions without external control lay the foundation for the realization of droplet calculation. We developed AND, OR, and XOR logic gates of the "liquid circuit" and combined them into a binary adder, which successfully completed the addition of four-digit binary numbers through droplet movement. Moreover, we attempted to perform algorithmic design for biological information under the control of droplets based on synchronous logical operations, developing the possibility of biological applications. This programmable physical computing system exists independently of electronic computing, aiming to supplement and expand the computing methods outside the field of electronic technology and to open a new method for the algorithmic operation of materials after combining new physical computing technologies such as biological or chemical computing.
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Affiliation(s)
- Gangpei Cai
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, Guangdong, China
| | - Fei Xu
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, Guangdong, China
| | - Bailiang Chen
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, Guangdong, China
| | - Xiang Li
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, Guangdong, China
| | - Jiajun Huang
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, Guangdong, China
- Research Institute of Tsinghua University in Shenzhen, Nanshan District, Shenzhen, China
| | - Shengli Mi
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, Guangdong, China
- Research Institute of Tsinghua University in Shenzhen, Nanshan District, Shenzhen, China
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11
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Zhang K, Du Z, Yuan T, Huang J, Zhao X, Mi S. Long-term cultured microvascular networks on chip for tumor vascularization research and drug testing. Biomicrofluidics 2022; 16:044101. [PMID: 35845724 PMCID: PMC9282889 DOI: 10.1063/5.0090027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Accepted: 06/13/2022] [Indexed: 06/15/2023]
Abstract
The vascular structure of the tumor microenvironment (TME) plays an essential role in the process of metastasis. In vitro microvascular structures that can be maintained for a long time will greatly promote metastasis research. In this study, we constructed a mimicking breast cancer invasion model based on a microfluidic chip platform, and the maintenance time of the self-assembled microvascular networks significantly improved by culturing with fibroblasts (up to 13 days). Using this model, we quantified the invasion ability of breast cancer cells and angiogenesis sprouts caused by cancer cells, and the intravasation behavior of cancer cells was also observed in sprouts. We found that cancer cells could significantly cause angiogenesis by promoting sprouting behaviors of the self-assembled human umbilical vein endothelial cells, which, in turn, promoted the invasion behavior of cancer cells. The drug test results showed that the drug resistance of the widely used anti-cancer drugs 5-Fluorouracil (5-FU) and Doxorubicin (DOX) in the 3D model was higher than that in the 2D model. Meanwhile, we also proved that 5-FU and DOX had the effect of destroying tumor blood vessels. The anti-angiogenic drug Apatinib (VEGFR inhibitor) enhanced the drug effect of DOX on MDA-MB-231 cells, further proving the promoting effect of angiogenesis on the invasion ability of cancer cells. These results indicate that our model is of great value in reconstructing TME and drug testing in vitro.
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Affiliation(s)
- Ke Zhang
- Open FIESTA Center, International Graduate School at Shenzhen, Tsinghua University, Shenzhen, China
| | - Zhichang Du
- College of Mechanical and Energy Engineering, Jimei University, Xiamen, China
| | - Tianying Yuan
- Precision Medicine and Healthcare Research Center, Tsinghua-Berkeley Shenzhen Institute, Shenzhen, China
| | - Jiajun Huang
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, China
| | - Xiaoyu Zhao
- Open FIESTA Center, International Graduate School at Shenzhen, Tsinghua University, Shenzhen, China
| | - Shengli Mi
- Author to whom correspondence should be addressed:
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12
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Dong L, Liang M, Guo Z, Wang A, Cai G, Yuan T, Mi S, Sun W. A Study on Dual-Response Composite Hydrogels Based on Oriented Nanocellulose. Int J Bioprint 2022; 8:578. [PMID: 36105134 PMCID: PMC9468960 DOI: 10.18063/ijb.v8i3.578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2022] [Accepted: 04/21/2022] [Indexed: 11/23/2022] Open
Abstract
In nature, many biological tissues are composed of oriented structures, which endow tissues with special properties and functions. Although traditional hydrogels can achieve a high level of biomimetic composition, the orderly arrangement of internal structures remains a challenge. Therefore, it is of great significance to synthesize hydrogels with oriented structures easily and quickly. In this study, we first proposed and demonstrated a fabrication process for producing a well-ordered and dual-responsive cellulose nanofibers + hyaluronic acid methacrylate (CN+HAMA) hydrogels through an extrusion-based three-dimensional (3D) printing process. CN in the CN+HAMA hydrogels are directionally aligned after extrusion due to shear stress. In addition, the synthesized hydrogels exhibited responsive behaviors to both temperature and ultraviolet light. Since the temperature-responsiveness is reversible, the hydrogels can transit between the gelation and solution states while retaining their original qualities. Furthermore, the developed well-oriented CN+HAMA hydrogels induced directional cell growth, paving the way for potential applications in ordered biological soft-tissue repair.
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13
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Huang Z, Wei C, Dong L, Wang A, Yao H, Guo Z, Mi S. Fluid-driven Hydrogel Actuators with an Origami Structure. iScience 2022; 25:104674. [PMID: 35856021 PMCID: PMC9287195 DOI: 10.1016/j.isci.2022.104674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Revised: 06/03/2022] [Accepted: 06/21/2022] [Indexed: 11/09/2022] Open
Abstract
Owing to the innate good biocompatibility, tissue-like softness and other unique properties, hydrogels are of particular interest as promising compliant materials for biomimetic soft actuators. However, the actuation diversity of hydrogel actuators is always restricted by their structure design and fabrication methods. Herein, origami structures were introduced to the design of fluid-driven hydrogel actuators to achieve diverse actuation movements, and a facile fabrication strategy based on removable templates and inside-out diffusion-induced in situ hydrogel crosslinking was adopted. As a result, three types of modular cuboid actuator units (CAUs) achieved linear motion, bending, and twisting. Moreover, combinations of multiple CAUs achieved different actuation modes, including actuation decoupling, superposition, and reprogramming. The diverse actuation functionality would enable new possibilities in application fields for hydrogel soft actuators. Several simple application demos, such as grippers for grasping tasks and a multi-way circuit switch, demonstrated their potential for further applications. Origami structures were introduced to fluid-driven hydrogel actuators Three types of cuboid actuator units (CAUs) achieved linear motion, bending, and twisting A fabrication strategy was based on removable templates and in situ formation Combinations of multiple CAUs achieved different actuation modes
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14
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Wang A, Dong L, Guo Z, Sun W, Mi S. A methacrylated hyaluronic acid network reinforced Pluronic F-127 gel for treatment of bacterial keratitis. Biomed Mater 2022; 17. [PMID: 35545060 DOI: 10.1088/1748-605x/ac6ea9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Accepted: 05/11/2022] [Indexed: 11/12/2022]
Abstract
In this study, we developed a novel in situ thermoresponsive gel by introducing crosslinked methacrylated hyaluronic acid (HA-MA) networks into Pluronic F-127 (PF-127) gel (HP gel) to achieve levofloxacin (LFX) delivery in bacterial keratitis treatment. The interactions between PF-127 and HA-MA networks were studied by scanning electron microscopy, rheology, dynamic light scattering, differential scanning calorimetry, and small angle X-ray scattering. The results showed that the HP gel exhibited a higher critical gelling temperature and lower viscosity than the PF-127 gel (P gel), and could form a uniform thin layer on the ocular surface. Moreover, the drug release profile and gel dissolution rate revealed that the HA-MA network could retard the diffusion and dissolution of drug molecules and prolong the drug release time, which corresponded to an enhanced antibacterial ability of the HP-LFX gel. Furthermore, the HP gel exhibited low cytotoxicity to human corneal epithelial cells (HCECs). Finally, an in vivo pharmacodynamic study was conducted with rabbit keratitis models. An improved treatment efficacy was observed after application of the HP-LFX gels. This study highlights the potential of HP gels in ophthalmic drug delivery.
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Affiliation(s)
- Anyang Wang
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China, Shenzhen, 518055, CHINA
| | - Lina Dong
- Macromolecular Platforms for Translational Medicine and Bio-Manufacturing Laboratory, University of California Berkeley Tsinghua-Berkeley Shenzhen Institute, Energy & Enviromental Building, room 1112, Shenzhen, 518055, CHINA
| | - Zhongwei Guo
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China, Macromolecular Platforms for Translational Medicine and Bio-Manufacturing Laboratory, Tsinghua-Berkeley Shenzhen Institute, Shenzhen 518055, P.R. China, Shenzhen, 518055, CHINA
| | - Wei Sun
- Tsinghua University, Tsinghua University, Beijing, Beijing, 100084, CHINA
| | - Shengli Mi
- Graduate School at Shenzhen, Tsinghua University, Room 102, Building J, University Town, Shenzhen 518055, P.R.CHINA, shenzhen, 518055, CHINA
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15
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Tian C, Yang J, Li P, Zhang S, Mi S. OCT Retinal fundus image super-resolution based on a realistic mixed attention GAN (RMA-GAN). Med Phys 2022; 49:3185-3198. [PMID: 35238048 DOI: 10.1002/mp.15580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 01/27/2022] [Accepted: 02/11/2022] [Indexed: 11/07/2022] Open
Abstract
PURPOSE Optical coherence tomography (OCT) is widely used to diagnose retinal diseases. However, due to the limited resolution of OCT imaging systems, the quality of fundus images displayed is not satisfactory, which hinders the diagnosis of patients by ophthalmologists. This is an inevitable problem of OCT imaging systems, but few people have given attention to it. We attempt to solve this problem through deep learning methods. METHODS In this paper, we propose a single image superresolution (SISR) model that is based on a generative adversarial network (GAN) for restoring low-resolution (LR) OCT fundus images to high-resolution (HR) counterparts. To obtain more realistic images, we craft the training dataset by obtaining the real blur kernels of the LR images instead of using the bicubic interpolation kernel. The baseline of our generator is similar to that of an enhanced superresolution generative adversarial network (ESRGAN), but we creatively propose a mixed attention block (MAB). In contrast to other SR tasks, to adapt to the characteristics of OCT imaging systems, our network can reconstruct LR images with different upscaling factors in the height and width directions. RESULTS The results of qualitative and quantitative experiments prove that our model is capable of reconstructing retinal fundus images clearly and accurately. CONCLUSIONS We propose a new GAN model for enhancing the quality of displayed OCT retinal fundus images and achieve state-of-the-art results. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Chunhao Tian
- Division of Advanced Manufacturing, International Graduate School at Shenzhen, Tsinghua University.,Shenzhen MOPTIM Imaging Technique Co., Ltd.,Shenzhen Eye Hospital affiliated to Jinan University, Shenzhen Eye Institute
| | - Jian Yang
- Division of Advanced Manufacturing, International Graduate School at Shenzhen, Tsinghua University.,Shenzhen MOPTIM Imaging Technique Co., Ltd.,Shenzhen Eye Hospital affiliated to Jinan University, Shenzhen Eye Institute
| | - Peng Li
- Division of Advanced Manufacturing, International Graduate School at Shenzhen, Tsinghua University.,Shenzhen MOPTIM Imaging Technique Co., Ltd.,Shenzhen Eye Hospital affiliated to Jinan University, Shenzhen Eye Institute
| | - Shaochong Zhang
- Division of Advanced Manufacturing, International Graduate School at Shenzhen, Tsinghua University.,Shenzhen MOPTIM Imaging Technique Co., Ltd.,Shenzhen Eye Hospital affiliated to Jinan University, Shenzhen Eye Institute
| | - Shengli Mi
- Division of Advanced Manufacturing, International Graduate School at Shenzhen, Tsinghua University.,Shenzhen MOPTIM Imaging Technique Co., Ltd.,Shenzhen Eye Hospital affiliated to Jinan University, Shenzhen Eye Institute
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16
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Xu W, Kong B, Xie H, Zhang J, Liu W, Liu S, Zhang Y, Yang F, Xiao J, Mi S, Xiong L, Zhang M, Jiang F. PCL scaffold combined with rat tail collagen type I to reduce keratocyte differentiation and prevent corneal stroma fibrosis after injury. Exp Eye Res 2022; 217:108936. [DOI: 10.1016/j.exer.2022.108936] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 12/15/2021] [Accepted: 01/07/2022] [Indexed: 11/15/2022]
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17
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Lin J, Sun AR, Li J, Yuan T, Cheng W, Ke L, Chen J, Sun W, Mi S, Zhang P. A Three-Dimensional Co-Culture Model for Rheumatoid Arthritis Pannus Tissue. Front Bioeng Biotechnol 2021; 9:764212. [PMID: 34869276 PMCID: PMC8638776 DOI: 10.3389/fbioe.2021.764212] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Accepted: 10/27/2021] [Indexed: 11/13/2022] Open
Abstract
Three-dimensional (3D) co-culture models have closer physiological cell composition and behavior than traditional 2D culture. They exhibit pharmacological effects like in vivo responses, and therefore serve as a high-throughput drug screening model to evaluate drug efficacy and safety in vitro. In this study, we created a 3D co-culture environment to mimic pathological characteristics of rheumatoid arthritis (RA) pannus tissue. 3D scaffold was constructed by bioprinting technology with synovial fibroblasts (MH7A), vascular endothelial cells (EA.hy 926) and gelatin/alginate hydrogels. Cell viability was observed during 7-day culture and the proliferation rate of co-culture cells showed a stable increase stage. Cell-cell interactions were evaluated in the 3D printed scaffold and we found that spheroid size increased with time. TNF-α stimulated MH7A and EA.hy 926 in 3D pannus model showed higher vascular endothelial growth factor (VEGF) and angiopoietin (ANG) protein expression over time. For drug validation, methotrexate (MTX) was used to examine inhibition effects of angiogenesis in 3D pannus co-culture model. In conclusion, this 3D co-culture pannus model with biological characteristics may help the development of anti-RA drug research.
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Affiliation(s)
- Jietao Lin
- Center for Translational Medicine Research and Development, Shenzhen Institute of Advanced Technology, Chinese Academy of Science, Shenzhen, China.,University of Chinese Academy of Sciences, Beijing, China.,Shenzhen Engineering Research Center for Medical Bioactive Materials, Shenzhen, China
| | - Antonia RuJia Sun
- Center for Translational Medicine Research and Development, Shenzhen Institute of Advanced Technology, Chinese Academy of Science, Shenzhen, China.,University of Chinese Academy of Sciences, Beijing, China.,Shenzhen Engineering Research Center for Medical Bioactive Materials, Shenzhen, China
| | - Jian Li
- Center for Translational Medicine Research and Development, Shenzhen Institute of Advanced Technology, Chinese Academy of Science, Shenzhen, China.,University of Chinese Academy of Sciences, Beijing, China.,Shenzhen Engineering Research Center for Medical Bioactive Materials, Shenzhen, China
| | - Tianying Yuan
- Biomanufacturing Center, Department of Mechanical Engineering, Tsinghua University, Beijing, China
| | - Wenxiang Cheng
- Center for Translational Medicine Research and Development, Shenzhen Institute of Advanced Technology, Chinese Academy of Science, Shenzhen, China.,University of Chinese Academy of Sciences, Beijing, China.,Shenzhen Engineering Research Center for Medical Bioactive Materials, Shenzhen, China
| | - Liqing Ke
- Center for Translational Medicine Research and Development, Shenzhen Institute of Advanced Technology, Chinese Academy of Science, Shenzhen, China.,University of Chinese Academy of Sciences, Beijing, China.,Shenzhen Engineering Research Center for Medical Bioactive Materials, Shenzhen, China
| | - Jianhai Chen
- Center for Translational Medicine Research and Development, Shenzhen Institute of Advanced Technology, Chinese Academy of Science, Shenzhen, China.,University of Chinese Academy of Sciences, Beijing, China.,Shenzhen Engineering Research Center for Medical Bioactive Materials, Shenzhen, China
| | - Wei Sun
- Biomanufacturing Center, Department of Mechanical Engineering, Tsinghua University, Beijing, China
| | - Shengli Mi
- Biomanufacturing Center, Department of Mechanical Engineering, Tsinghua University, Beijing, China
| | - Peng Zhang
- Center for Translational Medicine Research and Development, Shenzhen Institute of Advanced Technology, Chinese Academy of Science, Shenzhen, China.,University of Chinese Academy of Sciences, Beijing, China.,Shenzhen Engineering Research Center for Medical Bioactive Materials, Shenzhen, China
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18
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Chen Y, Dong L, Kong B, Huang Y, Zhong S, Connon C, Tan J, Yang S, Sun W, Mi S. Effects of Gelatin Methacrylate Hydrogel on Corneal Repair and Regeneration in Rats. Transl Vis Sci Technol 2021; 10:25. [PMID: 34935910 PMCID: PMC8711000 DOI: 10.1167/tvst.10.14.25] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
Purpose This study investigates the repairing process of rat cornea after surgery of lamellar keratoplasty (LKP) and evaluates the effects of gelatin methacrylate (GelMA) hydrogel. Methods In the LKP group, the lamellar stroma matrixes of Sprague-Dawley rats were transplanted to enhanced green fluorescent protein rats, whereas those in the GelMA group were also embedded with a GelMA hydrogel during the corneal transplantation. Grafted eyes were harvested on days seven, 30, and 90. Hematoxylin and eosin staining, immunofluorescence staining, scanning electron microscopy, optical coherence tomography, and a slit-lamp microscope were used to study the process of corneal restoration and regeneration. Results A total of 42 rats were analyzed, including 18 rats in each of the experimental group and six rats in the control group. After three months, the infiltration degree of inflammatory cells differed between the LKP group and the GelMA group (P < 0.001). Moreover, in multiple comparisons in corneal thickness, significant difference was observed between the LKP group and the GelMA group. There was also divergence in the results between the LKP group and the control group (P < 0.001, P < 0.001). At the same time, the expression of α-smooth muscle actin (α-SMA) and transforming growth factor (TGF)-β1 varied distinctly between the LKP group and the GelMA group (P < 0.05, P < 0.001). Conclusions Significant differences were demonstrated between the LKP group and the GelMA group in inflammatory cell infiltration, corneal thickness, as well as the expression of α-SMA and TGF-β1. Those differences indicate the ability of GelMA hydrogel to support alleviation in corneal stroma fibrosis and show the influences of fibrosis in the dysfunction of corneal refractive power. Translational Relevance Our research provides new ideas for the future development of LKP and tissue-engineered corneas.
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Affiliation(s)
- Yun Chen
- Macromolecular Platforms for Translational Medicine and Bio-Manufacturing Laboratory, Tsinghua-Berkeley Shenzhen Institute, Shenzhen, P.R. China.,Open FIESTA Center, International Graduate School at Shenzhen, Tsinghua University, Shenzhen, P.R. China
| | - Lina Dong
- Macromolecular Platforms for Translational Medicine and Bio-Manufacturing Laboratory, Tsinghua-Berkeley Shenzhen Institute, Shenzhen, P.R. China
| | - Bin Kong
- Macromolecular Platforms for Translational Medicine and Bio-Manufacturing Laboratory, Tsinghua-Berkeley Shenzhen Institute, Shenzhen, P.R. China
| | - Yu Huang
- Biomanufacturing Engineering Laboratory, International Graduate School at Shenzhen, Tsinghua University, Shenzhen, P.R. China
| | - Suyi Zhong
- Institute of Optical Imaging and Sensing, Shenzhen Key Laboratory for Minimal Invasive Medical Technologies, Graduate School at Shenzhen, Tsinghua University, Shenzhen, P.R. China
| | - Che Connon
- Biosciences Institute, Newcastle University
| | - Jiaqi Tan
- Open FIESTA Center, International Graduate School at Shenzhen, Tsinghua University, Shenzhen, P.R. China
| | - Siming Yang
- Key Laboratory of Wound Repair and Regeneration of PLA, Chinese PLA General Hospital, Medical College of PLA, Beijing, P.R. China
| | - Wei Sun
- Macromolecular Platforms for Translational Medicine and Bio-Manufacturing Laboratory, Tsinghua-Berkeley Shenzhen Institute, Shenzhen, P.R. China.,Department of Mechanical Engineering, Biomanufacturing Center, Tsinghua University, Beijing, P.R. China.,Department of Mechanical Engineering, Drexel University, Philadelphia, PA, USA
| | - Shengli Mi
- Macromolecular Platforms for Translational Medicine and Bio-Manufacturing Laboratory, Tsinghua-Berkeley Shenzhen Institute, Shenzhen, P.R. China.,Open FIESTA Center, International Graduate School at Shenzhen, Tsinghua University, Shenzhen, P.R. China.,Department of Mechanical Engineering, Biomanufacturing Center, Tsinghua University, Beijing, P.R. China
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19
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Wen H, Luo H, Yang M, Augustino SMA, Wang D, Mi S, Guo Y, Zhang Y, Xiao W, Wang Y, Yu Y. Genetic parameters and weighted single-step genome-wide association study for supernumerary teats in Holstein cattle. J Dairy Sci 2021; 104:11867-11877. [PMID: 34482976 DOI: 10.3168/jds.2020-19943] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Accepted: 06/29/2021] [Indexed: 01/22/2023]
Abstract
Supernumerary teats (SNT) are a common epidermal abnormality of udders in mammals. The SNT negatively affect machine milking ability, udder health, and animal welfare and sometimes act as reservoirs for undesirable bacteria, resulting in economic losses on calves and lactating cows due to the cost of SNT removal surgery, early culling, and low milk yield. This study aimed to analyze the incidence and genetic parameter of SNT and detect SNT-related genes in Chinese Holstein cattle. In this study, the incidence of SNT was recorded in 4,670 Chinese Holstein cattle (born between 2008 and 2017) from 2 farms, including 734 genotyped cows with 114,485 SNPs. The SNT had a total frequency of 9.8% and estimated heritability of 0.22 (SE = 0.07), which were obtained using a threshold model in the studied Chinese Holstein population. Furthermore, we calculated approximate genetic correlations between SNT and the following indicator traits: 12 milk production, 28 body conformation, 5 fertility and reproduction, 5 health, and 9 longevity. Generally, the estimated correlations, such as 305-d milk yield for third parity (-0.55; SE = 0.02) and age at first calving in heifer (0.19; SE = 0.03), were low to moderate. A single-step GWAS was implemented, and 10 genes associated with SNT located in BTA4 were identified. The region (112.70-112.90 Mb) on BTA4 showed the highest genetic variance for SNT. The quantitative trait loci on BTA4 was mapped into the RARRES2 gene, which was previously shown to affect adipogenesis and hormone secretion. The WIF1 gene, which was located in BTA5, was also considered as a candidate gene for SNT. Overall, these findings provide useful information for breeders who are interested in reducing SNT.
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Affiliation(s)
- H Wen
- Laboratory of Animal Genetics, Breeding and Reproduction, Ministry of Agriculture of China, National Engineering Laboratory of Animal Breeding, College of Animal Science and Technology, China Agricultural University, 100193, Beijing, China
| | - H Luo
- Laboratory of Animal Genetics, Breeding and Reproduction, Ministry of Agriculture of China, National Engineering Laboratory of Animal Breeding, College of Animal Science and Technology, China Agricultural University, 100193, Beijing, China
| | - M Yang
- Laboratory of Animal Genetics, Breeding and Reproduction, Ministry of Agriculture of China, National Engineering Laboratory of Animal Breeding, College of Animal Science and Technology, China Agricultural University, 100193, Beijing, China
| | - S M A Augustino
- Laboratory of Animal Genetics, Breeding and Reproduction, Ministry of Agriculture of China, National Engineering Laboratory of Animal Breeding, College of Animal Science and Technology, China Agricultural University, 100193, Beijing, China
| | - D Wang
- Laboratory of Animal Genetics, Breeding and Reproduction, Ministry of Agriculture of China, National Engineering Laboratory of Animal Breeding, College of Animal Science and Technology, China Agricultural University, 100193, Beijing, China
| | - S Mi
- Laboratory of Animal Genetics, Breeding and Reproduction, Ministry of Agriculture of China, National Engineering Laboratory of Animal Breeding, College of Animal Science and Technology, China Agricultural University, 100193, Beijing, China
| | - Y Guo
- Department of Clinical Sciences, Swedish University of Agricultural Sciences, SLU 75007, Uppsala, Sweden
| | - Y Zhang
- Laboratory of Animal Genetics, Breeding and Reproduction, Ministry of Agriculture of China, National Engineering Laboratory of Animal Breeding, College of Animal Science and Technology, China Agricultural University, 100193, Beijing, China
| | - W Xiao
- Beijing Animal Husbandry Station, No. 15A Anwaibeiyuan Road, 100029, Beijing, China
| | - Y Wang
- Laboratory of Animal Genetics, Breeding and Reproduction, Ministry of Agriculture of China, National Engineering Laboratory of Animal Breeding, College of Animal Science and Technology, China Agricultural University, 100193, Beijing, China.
| | - Y Yu
- Laboratory of Animal Genetics, Breeding and Reproduction, Ministry of Agriculture of China, National Engineering Laboratory of Animal Breeding, College of Animal Science and Technology, China Agricultural University, 100193, Beijing, China.
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20
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Zhao X, Li X, Yang W, Peng J, Huang J, Mi S. An integrated microfluidic detection system for the automated and rapid diagnosis of high-risk human papillomavirus. Analyst 2021; 146:5102-5114. [PMID: 34264258 DOI: 10.1039/d1an00623a] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Human papillomavirus (HPV) causes the prevalent sexually transmitted infection that accounts for the majority of cervical cancer incidences. Therefore, the development of a rapid, accurate, automatic and affordable nucleic acid detection strategy is urgently required for HPV tests, among which microfluidic chip is a promising diagnostic method. In this work, we developed a microfluidic detection system consisting of a microfluidic chip and the corresponding detection equipment to diagnose high-risk HPV. The proposed method integrates nucleic acid purification, isothermal amplification and real-time fluorescence detection into one device. Moreover, it demonstrates good detection performance such as high specificity of primer sets (100%) and exceptional stability (coefficient of variation <6%) among five HPV genotypes. Besides, the microfluidic loop-mediated isothermal amplification (LAMP) assay is accurate (specificity of 91.7% and sensitivity of 100%) and fast (average time threshold = 10.56 minutes) when considering the conventional qPCR assay as the gold standard. The integrated microfluidic detection system offers automated and rapid diagnosis within 40 minutes and shows broad potential to deliver point-of-care detection in resource-limited circumstances owing to its simplicity and affordability.
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Affiliation(s)
- Xiaoyu Zhao
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, China
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21
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Li X, Zhao X, Yang W, Xu F, Chen B, Peng J, Huang J, Mi S. Stretch-driven microfluidic chip for nucleic acid detection. Biotechnol Bioeng 2021; 118:3559-3568. [PMID: 34042175 DOI: 10.1002/bit.27839] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Accepted: 05/20/2021] [Indexed: 11/09/2022]
Abstract
Molecular diagnosis is an essential means to detect pathogens. The portable nucleic acid detection chip has excellent prospects in places where medical resources are scarce, and it is also of research interest in the field of microfluidic chips. Here, the article developed a new type of microfluidic chip for nucleic acid detection where stretching acts as the driving force. The sample entered the chip by applying capillary force. The strain valve was opened under the action of tensile force, and the spring pump generated the power to drive the fluid to flow to the detection chamber in a specific direction. The detection of coronavirus disease 2019 (COVID-19) was realized on the chip. The RT-LAMP amplification system was adopted to observe the liquid color in the detection chamber to decide whether the sample tested positive or negative qualitatively.
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Affiliation(s)
- Xiang Li
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Guangdong, Shenzhen, China
| | - Xiaoyu Zhao
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Guangdong, Shenzhen, China
| | - Weihao Yang
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Guangdong, Shenzhen, China
| | - Fei Xu
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Guangdong, Shenzhen, China
| | - Bailiang Chen
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Guangdong, Shenzhen, China
| | - Jiwei Peng
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Guangdong, Shenzhen, China
| | - Jiajun Huang
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Guangdong, Shenzhen, China
| | - Shengli Mi
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Guangdong, Shenzhen, China
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Guo Z, Dong L, Xia J, Mi S, Sun W. 3D Printing Unique Nanoclay-Incorporated Double-Network Hydrogels for Construction of Complex Tissue Engineering Scaffolds. Adv Healthc Mater 2021; 10:e2100036. [PMID: 33949152 DOI: 10.1002/adhm.202100036] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Revised: 03/26/2021] [Indexed: 12/26/2022]
Abstract
The development of new biomaterial inks with good structural formability and mechanical strength is critical to the fabrication of 3D tissue engineering scaffolds. For extrusion-based 3D printing, the resulting 3D constructs are essentially a sequential assembly of 1D filaments into 3D constructs. Inspired by this process, this paper reports the recent study on 3D printing of nanoclay-incorporated double-network (NIDN) hydrogels for the fabrication of 1D filaments and 3D constructs without extra assistance of support bath. The frequently used "house-of-cards" architectures formed by nanoclay are disintegrated in the NIDN hydrogels. However, nanoclay can act as physical crosslinkers to interact with polymer chains of methacrylated hyaluronic acid (HAMA) and alginate (Alg), which endows the hydrogel precursors with good structural formability. Various straight filaments, spring-like loops, and complex 3D constructs with high shape-fidelity and good mechanical strength are fabricated successfully. In addition, the NIDN hydrogel system can easily be transformed into a new type of magnetic responsive hydrogel used for 3D printing. The NIDN hydrogels also supported the growth of bone marrow mesenchymal stem cells and displayed potential calvarial defect repair functions.
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Affiliation(s)
- Zhongwei Guo
- Tsinghua Shenzhen International Graduate School Tsinghua University Shenzhen 518055 China
- Precision Medicine and Healthcare Research Center Tsinghua‐Berkeley Shenzhen Institute Tsinghua University Shenzhen 518055 China
| | - Lina Dong
- Precision Medicine and Healthcare Research Center Tsinghua‐Berkeley Shenzhen Institute Tsinghua University Shenzhen 518055 China
| | - Jingjing Xia
- Department of Mechanical Engineering and Mechanics Tsinghua University Beijing 100084 China
| | - Shengli Mi
- Tsinghua Shenzhen International Graduate School Tsinghua University Shenzhen 518055 China
| | - Wei Sun
- Tsinghua Shenzhen International Graduate School Tsinghua University Shenzhen 518055 China
- Precision Medicine and Healthcare Research Center Tsinghua‐Berkeley Shenzhen Institute Tsinghua University Shenzhen 518055 China
- Department of Mechanical Engineering and Mechanics Tsinghua University Beijing 100084 China
- Department of Mechanical Engineering Drexel University Philadelphia PA 19104 United States
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Huang J, Zhao X, Li X, Peng J, Yang W, Mi S. HMGCR inhibition stabilizes the glycolytic enzyme PKM2 to support the growth of renal cell carcinoma. PLoS Biol 2021; 19:e3001197. [PMID: 33905408 PMCID: PMC8104400 DOI: 10.1371/journal.pbio.3001197] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Revised: 05/07/2021] [Accepted: 03/19/2021] [Indexed: 02/06/2023] Open
Abstract
Renal cell carcinoma (RCC) is responsible for most cases of the kidney cancer. Previous research showed that low serum levels of cholesterol level positively correlate with poorer RCC-specific survival outcomes. However, the underlying mechanisms and functional significance of the role of cholesterol in the development of RCC remain obscure. 3-Hydroxy-3-methylglutaryl coenzyme A reductase (HMGCR) plays a pivotal role in RCC development as it is the key rate-limiting enzyme of the cholesterol biosynthetic pathway. In this study, we demonstrated that the inhibition of HMGCR could accelerate the development of RCC tumors by lactate accumulation and angiogenesis in animal models. We identified that the inhibition of HMGCR led to an increase in glycolysis via the regulated HSP90 expression levels, thus maintaining the levels of a glycolysis rate-limiting enzyme, pyruvate kinase M2 (PKM2). Based on these findings, we reversed the HMGCR inhibition-induced tumor growth acceleration in RCC xenograft mice by suppressing glycolysis. Furthermore, the coadministration of Shikonin, a potent PKM2 inhibitor, reverted the tumor development induced by the HMGCR signaling pathway.
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Affiliation(s)
- Jiajun Huang
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, Guangdong, China
| | - Xiaoyu Zhao
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, Guangdong, China
| | - Xiang Li
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, Guangdong, China
| | - Jiwei Peng
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, Guangdong, China
| | - Weihao Yang
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, Guangdong, China
| | - Shengli Mi
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, Guangdong, China
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24
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Hu Y, Huang Y, Chen Y, Ye C, Wei W, Feng Y, Mi S. Study on patterned photodynamic cross-linking for keratoconus. Exp Eye Res 2021; 204:108450. [PMID: 33497690 DOI: 10.1016/j.exer.2021.108450] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Revised: 12/30/2020] [Accepted: 01/12/2021] [Indexed: 10/22/2022]
Abstract
PURPOSE This study examined the patterned treatment of corneal collagen cross-linking (CXL) for keratoconus to reduce the complications caused by ultraviolet (UV) irradiation. By modifying the method of UV irradiation during the cross-linking process, cross-linking with a special structure is achieved, and the cross-linking effect is analyzed and compared to that of traditional cross-linking. By constructing an animal model of keratoconus, the process and effect of corneal cross-linking can be investigated more fundamentally. These studies provide valuable references for future cross-linking precision improvement and specialization. METHOD By injecting exogenous collagenase into the corneal stroma of rabbits, the balance between collagenase and collagenase inhibitor in the corneal stroma was disrupted, the collagen fiber structure of the cornea was broken to simulate the pathogenesis of keratoconus, and an animal model of keratoconus was thus constructed. Two custom cross-linking patterns were designed with reference to the cable dome structure, and these two special patterns were irradiated and cross-linked by a DMD chip. The cross-linking effect was evaluated by optical coherence tomography (OCT), corneal topography and corneal biaxial tensile tests. The experimental rabbits were divided into four groups: group A, cross-linking of the bird's nest structure; group B, cross-linking of the honeycomb structure; group C, cross-linking of the traditional spot structure; and group D, normal (without modeling and cross-linking). RESULT Following collagenase treatment, the collagen fiber structure of the rabbit cornea was destroyed, the central thickness of the cornea was reduced, the mechanical properties of the cornea were weakened, and no keratitis, ulcers or haze occurred. After the three cross-linking treatments, the morphology of the cornea improved, the density of the stromal layer increased, and the mechanical properties were enhanced. For the improvement of keratoconus mechanical properties, the average relative difference (Δ) of the four outcome measures was 61.98% for bird's nest cross-linking versus keratoconus (Wilcoxon rank sum test, P = 0.024), 16.13% for honeycomb cross-linking versus keratoconus (Wilcoxon rank sum test, P = 0.025), and 21.07% for traditional spot cross-linking versus keratoconus (Wilcoxon rank sum test, P = 0.014). All these differences are statistically significant. CONCLUSION All three methods of cross-linking can improve the morphology and tissue structure of keratoconus and significantly improve the biomechanical properties of the cornea. Among them, the corneal cross-linking of the bird's nest structure attains the best biomechanical properties, followed by the corneal cross-linking of the traditional spot structure and of the honeycomb structure. This suggests that similar or better cross-linking effects can be achieved by designing custom structures with less UV exposure. This provides a direction for future research on better and more accurate pattern cross-linking treatments.
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Affiliation(s)
- Yingbing Hu
- Open FIESTA Center, International Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, PR China; Biomanufacturing Engineering Laboratory, International Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, PR China
| | - Yu Huang
- Biomanufacturing Engineering Laboratory, International Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, PR China
| | - Yun Chen
- Open FIESTA Center, International Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, PR China; Biomanufacturing Engineering Laboratory, International Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, PR China
| | - Cheng Ye
- Open FIESTA Center, International Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, PR China; Biomanufacturing Engineering Laboratory, International Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, PR China
| | - Wei Wei
- Shaanxi Institute of Ophthalmology, Xi'an, China
| | - Yun Feng
- Ophthalmology Department, Peking University Third Hospital, China
| | - Shengli Mi
- Open FIESTA Center, International Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, PR China; Biomanufacturing Engineering Laboratory, International Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, PR China; Department of Mechanical Engineering, Biomanufacturing Center, Tsinghua University, Beijing, PR China.
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Wang J, Chen Y, Bai Y, Quan D, Wang Z, Xiong L, Shao Z, Sun W, Mi S. A core-skirt designed artificial cornea with orthogonal microfiber grid scaffold. Exp Eye Res 2020; 195:108037. [DOI: 10.1016/j.exer.2020.108037] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 04/03/2020] [Accepted: 04/08/2020] [Indexed: 11/29/2022]
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Kong B, Chen Y, Liu R, Liu X, Liu C, Shao Z, Xiong L, Liu X, Sun W, Mi S. Fiber reinforced GelMA hydrogel to induce the regeneration of corneal stroma. Nat Commun 2020; 11:1435. [PMID: 32188843 PMCID: PMC7080797 DOI: 10.1038/s41467-020-14887-9] [Citation(s) in RCA: 128] [Impact Index Per Article: 32.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2018] [Accepted: 02/03/2020] [Indexed: 11/16/2022] Open
Abstract
Regeneration of corneal stroma has always been a challenge due to its sophisticated structure and keratocyte-fibroblast transformation. In this study, we fabricate grid poly (ε-caprolactone)-poly (ethylene glycol) microfibrous scaffold and infuse the scaffold with gelatin methacrylate (GelMA) hydrogel to obtain a 3 D fiber hydrogel construct; the fiber spacing is adjusted to fabricate optimal construct that simulates the stromal structure with properties most similar to the native cornea. The topological structure (3 D fiber hydrogel, 3 D GelMA hydrogel, and 2 D culture dish) and chemical factors (serum, ascorbic acid, insulin, and β-FGF) are examined to study their effects on the differentiation of limbal stromal stem cells to keratocytes or fibroblasts and the phenotype maintenance, in vitro and in vivo tissue regeneration. The results demonstrate that fiber hydrogel and serum-free media synergize to provide an optimal environment for the maintenance of keratocyte phenotype and the regeneration of damaged corneal stroma. Regeneration of corneal stroma has been a challenge due to its sophisticated structure and the easy transformation of the keratocyte. Here, the authors use a hydrogel reinforced with orthogonally aligned fibres and serum free medium to maintain keratocyte phenotype for the in vivo stromal regeneration.
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Affiliation(s)
- Bin Kong
- Macromolecular Platforms for Translational Medicine and Bio-Manufacturing Laboratory, Tsinghua-Berkeley Shenzhen Institute, 518055, Shenzhen, P.R. China.,Biomanufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, 518055, Shenzhen, P.R. China
| | - Yun Chen
- Open FIESTA Center, Tsinghua Shenzhen International Graduate School, 518055, Shenzhen, P.R. China
| | - Rui Liu
- Biomanufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, 518055, Shenzhen, P.R. China
| | - Xi Liu
- Beijing Children's Hospital, 100045, Beijing, P.R. China
| | - Changyong Liu
- Additive Manufacturing Research Institute, College of Mechatronics and Control Engineering, Shenzhen University, 518060, Shenzhen, P.R. China
| | - Zengwu Shao
- Tongji Medical College, Huazhong University Science & Technology, 430022, Wuhan, P.R. China
| | - Liming Xiong
- Tongji Medical College, Huazhong University Science & Technology, 430022, Wuhan, P.R. China
| | - Xianning Liu
- Shaanxi Institute of Ophthalmology, 710002, Xi'an, P.R. China.,Shaanxi Key Laboratory of Eye, 710002, Xi'an, P.R. China
| | - Wei Sun
- Macromolecular Platforms for Translational Medicine and Bio-Manufacturing Laboratory, Tsinghua-Berkeley Shenzhen Institute, 518055, Shenzhen, P.R. China. .,Department of Mechanical Engineering, Tsinghua University, 100084, Beijing, P.R. China. .,Department of Mechanical Engineering and Mechanics, Drexel University, 19104, Philadelphia, PA, USA.
| | - Shengli Mi
- Biomanufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, 518055, Shenzhen, P.R. China. .,Open FIESTA Center, Tsinghua Shenzhen International Graduate School, 518055, Shenzhen, P.R. China.
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Guo Z, Xia J, Mi S, Sun W. Mussel-Inspired Naturally Derived Double-Network Hydrogels and Their Application in 3D Printing: From Soft, Injectable Bioadhesives to Mechanically Strong Hydrogels. ACS Biomater Sci Eng 2020; 6:1798-1808. [DOI: 10.1021/acsbiomaterials.9b01864] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Zhongwei Guo
- Precision Medicine and Healthcare Research Center, Tsinghua-Berkeley Shenzhen Institute, Tsinghua University, Shenzhen 518055, China
- Biomanufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
| | - Jingjing Xia
- Biomanufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
| | - Shengli Mi
- Biomanufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
| | - Wei Sun
- Precision Medicine and Healthcare Research Center, Tsinghua-Berkeley Shenzhen Institute, Tsinghua University, Shenzhen 518055, China
- Biomanufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
- Department of Mechanical Engineering and Mechanics, Tsinghua University, Beijing 100084, China
- Department of Mechanical Engineering, Drexel University, Philadelphia, Pennsylvania 19104, United States
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28
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Mi S, Yang S, Liu T, Du Z, Xu Y, Li B, Sun W. A Novel Controllable Cell Array Printing Technique on Microfluidic Chips. IEEE Trans Biomed Eng 2019; 66:2512-2520. [DOI: 10.1109/tbme.2019.2891016] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Mi S, Liu Z, Du Z, Yi X, Sun W. Three‐dimensional microfluidic tumor–macrophage system for breast cancer cell invasion. Biotechnol Bioeng 2019; 116:1731-1741. [DOI: 10.1002/bit.26961] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Revised: 01/24/2019] [Accepted: 02/21/2019] [Indexed: 12/30/2022]
Affiliation(s)
- Shengli Mi
- Graduate School at Shenzhen, Tsinghua UniversityShenzhen P.R. China
- Open FIESTA Center, Tsinghua UniversityShenzhen P.R. China
| | - Zhaoyu Liu
- Open FIESTA Center, Tsinghua UniversityShenzhen P.R. China
| | - Zhichang Du
- Graduate School at Shenzhen, Tsinghua UniversityShenzhen P.R. China
| | - Xiaoman Yi
- Graduate School at Shenzhen, Tsinghua UniversityShenzhen P.R. China
| | - Wei Sun
- Graduate School at Shenzhen, Tsinghua UniversityShenzhen P.R. China
- Department of Mechanical Engineering and MechanicsTsinghua UniversityBeijing P.R. China
- Department of Mechanical EngineeringDrexel UniversityPhiladelphia Pennsylvania
- Tsinghua‐Berkeley Shenzhen InstituteShenzhen P.R. China
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30
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Mi S, Xia J, Xu Y, Du Z, Sun W. An integrated microchannel biosensor platform to analyse low density lactate metabolism in HepG2 cells in vitro. RSC Adv 2019; 9:9006-9013. [PMID: 35517697 PMCID: PMC9062021 DOI: 10.1039/c9ra00694j] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2019] [Accepted: 03/08/2019] [Indexed: 11/21/2022] Open
Abstract
In this study, we developed an electrochemical microchannel biosensor platform to analyse lactate metabolism in cells. This biosensor platform was fabricated by photolithography, thin-film deposition and microfluidic technology. A kind of functional biomaterial was prepared by mixing lactate oxidase, single-walled carbon nanotubes and chitosan, and platinum as working and blank electrodes of the biosensor was modified by a thin Prussian blue layer. The lactate biosensor was obtained by dropping functional biomaterials on the electrode. The results demonstrated that the sensitivity of the electrochemical biosensor was up to 567 nA mM−1 mm−2 and the limit of detection was 4.5 μM (vs. Ag/AgCl as the counter/reference electrode). The biosensor used to quantitatively detect metabolic lactate concentrations in HepG2 cells cultured with cancer drugs showed high sensitivity, selectivity and stability, and has potential applications in organ-on-a-chip and tissue engineering technologies, which typically involve low concentrations of metabolites. In this study, we developed an electrochemical microchannel biosensor platform to analyse lactate metabolism in cells.![]()
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Affiliation(s)
- Shengli Mi
- Graduate School at Shenzhen
- Tsinghua University
- Shenzhen 51805
- P. R. China
- Department of Mechanical Engineering and Mechanics
| | - Jingjing Xia
- Graduate School at Shenzhen
- Tsinghua University
- Shenzhen 51805
- P. R. China
- Department of Mechanical Engineering and Mechanics
| | - Yuanyuan Xu
- Graduate School at Shenzhen
- Tsinghua University
- Shenzhen 51805
- P. R. China
- Department of Mechanical Engineering and Mechanics
| | - Zhichang Du
- Graduate School at Shenzhen
- Tsinghua University
- Shenzhen 51805
- P. R. China
- Department of Mechanical Engineering and Mechanics
| | - Wei Sun
- Graduate School at Shenzhen
- Tsinghua University
- Shenzhen 51805
- P. R. China
- Department of Mechanical Engineering and Mechanics
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31
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Jiang Y, Tang S, Wang C, Wang Y, Qin Y, Wang Y, Zhang J, Song H, Mi S, Yu F, Xiao W, Zhang Q, Ding X. A genome-wide association study of growth and fatness traits in two pig populations with different genetic backgrounds. J Anim Sci 2018. [PMID: 29528397 DOI: 10.1093/jas/skx038] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Improvement in growth and fatness traits are the main objectives in pig all breeding programs. Tenth rib backfat thickness (10RIBBFT) and days to 100 kg (D100), which are good predictors of carcass lean content and growth rate, respectively, are economically important traits and also main breeding target traits in pigs. To investigate the genetic mechanisms of 10RIBBFT and D100 of pigs, we sampled 1,137 and 888 pigs from 2 Yorkshire populations of American and British origin, respectively, and conducted genome-wide association study (GWAS) through combined analysis and meta-analysis, to identify SNPs associated with 10RIBBFT and D100. A total of 11 and 7 significant SNPs were identified by combined analysis for 10RIBBFT and D100, respectively. And in meta-analysis, 8 and 7 significant SNPs were identified for 10RIBBFT and D100, respectively. Among them, 6 and 5 common significant SNPs in two analysis results were, respectively, identified associated with 10RIBBFT and D100, and correspondingly explained 2.09% and 0.52% of the additive genetic variance of 10RIBBFT and D100. Further bioinformatics analysis revealed 10 genes harboring or close to these common significant SNPs, 5 for 10RIBBFT and 5 for D100. In particular, Gene Ontology analysis highlighted 6 genes, PCK1, ANGPTL3, EEF1A2, TNFAIP8L3, PITX2, and PLA2G12, as promising candidate genes relevant with backfat thickness and growth. PCK1, ANGPTL3, EEF1A2, and TNFAIP8L3 could influence backfat thickness through phospholipid transport, regulation of lipid metabolic process through the glycerophospholipid biosynthesis and metabolism pathway, the metabolism of lipids and lipoproteins pathway. PITX2 has a crucial role in skeletal muscle tissue development and animal organ morphogenesis, and PLA2G12A plays a role in the lipid catabolic and phospholipid catabolic processes, which both are involved in the body weight pathway. All these candidate genes could directly or indirectly influence fat production and growth in Yorkshire pigs. Our findings provide novel insights into the genetic basis of growth and fatness traits in pigs. The candidate genes for D100 and 10RIBBFT are worthy of further investigation.
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Affiliation(s)
- Y Jiang
- National Engineering Laboratory for Animal Breeding, Laboratory of Animal Genetics, Breeding and Reproduction, Ministry of Agriculture, College of Animal Science and Technology, China Agricultural University, Beijing, P.R. China
| | - S Tang
- Beijing Station of Animal Husbandry, Beijing, P.R. China
| | - C Wang
- National Engineering Laboratory for Animal Breeding, Laboratory of Animal Genetics, Breeding and Reproduction, Ministry of Agriculture, College of Animal Science and Technology, China Agricultural University, Beijing, P.R. China
| | - Y Wang
- National Engineering Laboratory for Animal Breeding, Laboratory of Animal Genetics, Breeding and Reproduction, Ministry of Agriculture, College of Animal Science and Technology, China Agricultural University, Beijing, P.R. China
| | - Y Qin
- National Engineering Laboratory for Animal Breeding, Laboratory of Animal Genetics, Breeding and Reproduction, Ministry of Agriculture, College of Animal Science and Technology, China Agricultural University, Beijing, P.R. China
| | - Y Wang
- National Engineering Laboratory for Animal Breeding, Laboratory of Animal Genetics, Breeding and Reproduction, Ministry of Agriculture, College of Animal Science and Technology, China Agricultural University, Beijing, P.R. China
| | - J Zhang
- National Engineering Laboratory for Animal Breeding, Laboratory of Animal Genetics, Breeding and Reproduction, Ministry of Agriculture, College of Animal Science and Technology, China Agricultural University, Beijing, P.R. China
| | - H Song
- National Engineering Laboratory for Animal Breeding, Laboratory of Animal Genetics, Breeding and Reproduction, Ministry of Agriculture, College of Animal Science and Technology, China Agricultural University, Beijing, P.R. China
| | - S Mi
- Beijing LM Pig Breeding Technology Co., Ltd., Beijing, P.R. China
| | - F Yu
- Beijing Shunxin Agricultural Co., Ltd., Beijing, P.R. China
| | - W Xiao
- Beijing Station of Animal Husbandry, Beijing, P.R. China
| | - Q Zhang
- National Engineering Laboratory for Animal Breeding, Laboratory of Animal Genetics, Breeding and Reproduction, Ministry of Agriculture, College of Animal Science and Technology, China Agricultural University, Beijing, P.R. China
| | - X Ding
- National Engineering Laboratory for Animal Breeding, Laboratory of Animal Genetics, Breeding and Reproduction, Ministry of Agriculture, College of Animal Science and Technology, China Agricultural University, Beijing, P.R. China
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Abstract
Organ-on-chips were designed to simulate the real tissue or organ microenvironment by precise control of the cells, the extracellular matrix and other micro-environmental factors to clarify physiological or pathological mechanisms. The organ chip is mainly based on the poly(dimethylsiloxane) (PDMS) microfluidic devices, whereas the conventional soft lithography requires a cumbersome manufacturing process, and the complex on-chip tissue or organ chip also depends on the complicated loading process of the cells and biomaterials. 3D printing can efficiently design and automatically print micrometre-scale devices, while bio-printing can also precisely manipulate cells and biomaterials to create complex organ or tissue structures. In recent years, the popularization of 3D printing has provided more possibilities for its application to 3D printed organ-on-chips. The combination of 3D printing and microfluidic technology in organ-on-chips provides a more efficient choice for building complex flow channels or chambers, as well as the ability to create biological structures with a 3D cell distribution, heterogeneity and tissue-specific function. The fabrication of complex, heterogeneous 3D printable biomaterials based on microfluidics also provides new assistance for building complex organ-on-chips. Here, we discuss the recent advances and potential applications of 3D printing in combination with microfluidics to organ-on-chips and provide outlooks on the integration of the two technologies in building efficient, automated, modularly integrated, and customizable organ-on-chips.
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Affiliation(s)
- Shengli Mi
- Biomanufacturing Engineering Laboratory, Advanced Manufacturing Division, Graduate School at Shenzhen, Tsinghua University, Shenzhen, P. R. China.
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Xu Y, Hu Y, Liu C, Yao H, Liu B, Mi S. A Novel Strategy for Creating Tissue-Engineered Biomimetic Blood Vessels Using 3D Bioprinting Technology. Materials (Basel) 2018; 11:ma11091581. [PMID: 30200455 PMCID: PMC6163305 DOI: 10.3390/ma11091581] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Revised: 08/22/2018] [Accepted: 08/27/2018] [Indexed: 02/07/2023]
Abstract
In this work, a novel strategy was developed to fabricate prevascularized cell-layer blood vessels in thick tissues and small-diameter blood vessel substitutes using three-dimensional (3D) bioprinting technology. These thick vascularized tissues were comprised of cells, a decellularized extracellular matrix (dECM), and a vasculature of multilevel sizes and multibranch architectures. Pluronic F127 (PF 127) was used as a sacrificial material for the formation of the vasculature through a multi-nozzle 3D bioprinting system. After printing, Pluronic F127 was removed to obtain multilevel hollow channels for the attachment of human umbilical vein endothelial cells (HUVECs). To reconstruct functional small-diameter blood vessel substitutes, a supporting scaffold (SE1700) with a double-layer circular structure was first bioprinted. Human aortic vascular smooth muscle cells (HA-VSMCs), HUVECs, and human dermal fibroblasts–neonatal (HDF-n) were separately used to form the media, intima, and adventitia through perfusion into the corresponding location of the supporting scaffold. In particular, the dECM was used as the matrix of the small-diameter blood vessel substitutes. After culture in vitro for 48 h, fluorescent images revealed that cells maintained their viability and that the samples maintained structural integrity. In addition, we analyzed the mechanical properties of the printed scaffold and found that its elastic modulus approximated that of the natural aorta. These findings demonstrate the feasibility of fabricating different kinds of vessels to imitate the structure and function of the human vascular system using 3D bioprinting technology.
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Affiliation(s)
- Yuanyuan Xu
- Biomanufacturing and Rapid Forming Technology Key Laboratory of Beijing, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China.
- Biomanufacturing Engineering Laboratory, Advanced Manufacturing Division, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China.
| | - Yingying Hu
- Biomanufacturing Engineering Laboratory, Advanced Manufacturing Division, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China.
| | - Changyong Liu
- Additive Manufacturing Research Institute, College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen 518060, China.
| | - Hongyi Yao
- Biomanufacturing Engineering Laboratory, Advanced Manufacturing Division, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China.
| | - Boxun Liu
- Department of Precision Medicine and Healthcare, Tsinghua-Berkeley Shenzhen Institute, Shenzhen 518055, China.
| | - Shengli Mi
- Biomanufacturing Engineering Laboratory, Advanced Manufacturing Division, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China.
- Open FIESTA Center, Tsinghua University, Shenzhen 518055, China.
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Wu Y, Qian X, Mi S, Zhang M, Sun S, Wang X. Generation of Size-controlled Poly (ethylene Glycol) Diacrylate Droplets via Semi-3-Dimensional Flow Focusing Microfluidic Devices. J Vis Exp 2018:57198. [PMID: 30035768 PMCID: PMC6102036 DOI: 10.3791/57198] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Uniform and size-controllable poly (ethylene glycol) diacrylate (PEGDA) droplets could be produced via the flow focusing process in a microfluidic device. This paper proposes a semi-three-dimensional (semi-3D) flow-focusing microfluidic chip for droplet formation. The polydimethylsiloxane (PDMS) chip was fabricated using the multi-layer soft lithography method. Hexadecane containing surfactant was used as the continuous phase, and PEGDA with the ultraviolet (UV) photo-initiator was the dispersed phase. Surfactants allowed the local surface tension to drop and formed a more cusped tip which promoted breaking into tiny micro-droplets. As the pressure of dispersed phase was constant, the size of droplets became smaller with increasing continuous phase pressure before dispersed phase flow was broken off. As a result, droplets with size variation from 1 µm to 80 µm in diameter could be selectively achieved by changing the pressure ratio in two inlet channels, and the average coefficient of variation was estimated to be below 7%. Furthermore, droplets could turn into micro-beads by UV exposure for photo-polymerization. Conjugating biomolecules on such micro-beads surface have many potential applications in the fields of biology and chemistry.
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Affiliation(s)
- Yan Wu
- Graduate School at Shenzhen, Tsinghua University
| | - Xiang Qian
- Graduate School at Shenzhen, Tsinghua University;
| | - Shengli Mi
- Graduate School at Shenzhen, Tsinghua University
| | - Min Zhang
- Graduate School at Shenzhen, Tsinghua University
| | - Shuqing Sun
- Graduate School at Shenzhen, Tsinghua University
| | - Xiaohao Wang
- Graduate School at Shenzhen, Tsinghua University; The State Key Laboratory of Precision Measurement Technology and Instruments, Tsinghua University
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35
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Du Z, Mi S, Yi X, Xu Y, Sun W. Microfluidic system for modelling 3D tumour invasion into surrounding stroma and drug screening. Biofabrication 2018; 10:034102. [DOI: 10.1088/1758-5090/aac70c] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Abstract
PCV3 is an emerging swine virus associated with porcine dermatitis and nephropathy syndrome (PDNS), reproductive failure, respiratory diseases and systematic inflammation. Although first identified in 2015, the earliest case has been traced back to 2009 in the United States. In China, PCV3 infection was first detected in 2015, but little information has been available about its occurrence and prevalence there before 2015. In this study, 200 porcine clinical samples collected from 20 provinces, five autonomous regions and four municipalities between 1990 and 1999 were analysed for PCV3 infection by PCR. Results showed that 6.5% of the porcine samples collected from eight provinces and one autonomous region were PCV3 positive, with the earliest cases occurring in 1996. Nucleotide sequence analysis showed that PCV3 strains obtained in this study shared 96.6%-99.7% and 97.1%-99.4% sequence identity at the ORF2 gene and genome levels with all available reference strains from China and other countries, indicating the high genetic stability of PCV3 over the past 20 years.
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Affiliation(s)
- J Sun
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, College of Veterinary Medicine, Northeast Agricultural University, Harbin, China.,Institute of Military Veterinary, Academy of Military Medical Sciences, Academy of Military Sciences, Changchun, China
| | - L Wei
- Beijing Key Laboratory for Prevention and Control of Infectious Diseases in Livestock and Poultry, Institute of Animal Husbandry and Veterinary Medicine, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China
| | - Z Lu
- College of Life Sciences and Engineering, Foshan University, Foshan, China
| | - S Mi
- Institute of Military Veterinary, Academy of Military Medical Sciences, Academy of Military Sciences, Changchun, China
| | - F Bao
- Institute of Military Veterinary, Academy of Military Medical Sciences, Academy of Military Sciences, Changchun, China.,Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonose, Yangzhou University, Yangzhou, China
| | - H Guo
- Institute of Military Veterinary, Academy of Military Medical Sciences, Academy of Military Sciences, Changchun, China
| | - C Tu
- Institute of Military Veterinary, Academy of Military Medical Sciences, Academy of Military Sciences, Changchun, China.,Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonose, Yangzhou University, Yangzhou, China
| | - Y Zhu
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, College of Veterinary Medicine, Northeast Agricultural University, Harbin, China
| | - W Gong
- Institute of Military Veterinary, Academy of Military Medical Sciences, Academy of Military Sciences, Changchun, China
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Xu Y, Guo X, Yang S, Li L, Zhang P, Sun W, Liu C, Mi S. Construction of bionic tissue engineering cartilage scaffold based on three-dimensional printing and oriented frozen technology. J Biomed Mater Res A 2018; 106:1664-1676. [DOI: 10.1002/jbm.a.36368] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Revised: 01/11/2018] [Accepted: 02/01/2018] [Indexed: 11/11/2022]
Affiliation(s)
- Yuanyuan Xu
- Biomanufacturing and Rapid Forming Technology Key Laboratory of Beijing, Department of Mechanical Engineering; Tsinghua University; Beijing China
- Biomanufacturing Engineering Laboratory; Graduate School at Shenzhen, Tsinghua University; Shenzhen Guangdong China
| | - Xiao Guo
- Biomanufacturing Engineering Laboratory; Graduate School at Shenzhen, Tsinghua University; Shenzhen Guangdong China
| | - Shuaitao Yang
- Biomanufacturing Engineering Laboratory; Graduate School at Shenzhen, Tsinghua University; Shenzhen Guangdong China
| | - Long Li
- Center for translational medicine, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences; Shenzhen Guangdong China
| | - Peng Zhang
- Center for translational medicine, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences; Shenzhen Guangdong China
| | - Wei Sun
- Biomanufacturing and Rapid Forming Technology Key Laboratory of Beijing, Department of Mechanical Engineering; Tsinghua University; Beijing China
- Biomanufacturing Engineering Laboratory; Graduate School at Shenzhen, Tsinghua University; Shenzhen Guangdong China
- Tsinghua-Berkeley Shenzhen Institute; Shenzhen Guangdong China
- Department of Mechanical Engineering; Drexel University; Philadelphia 19104 Pennsylvania
| | - Changyong Liu
- Additive Manufacturing Research Institute, College of Mechatronics and Control Engineering; Shenzhen University; Shenzhen Guangdong China
| | - Shengli Mi
- Biomanufacturing Engineering Laboratory; Graduate School at Shenzhen, Tsinghua University; Shenzhen Guangdong China
- Open FIESTA Center, Tsinghua University; Shenzhen Guangdong China
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38
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Wu Z, Kong B, Liu R, Sun W, Mi S. Engineering of Corneal Tissue through an Aligned PVA/Collagen Composite Nanofibrous Electrospun Scaffold. Nanomaterials (Basel) 2018; 8:E124. [PMID: 29495264 PMCID: PMC5853755 DOI: 10.3390/nano8020124] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Revised: 02/06/2018] [Accepted: 02/13/2018] [Indexed: 01/04/2023]
Abstract
Corneal diseases are the main reason of vision loss globally. Constructing a corneal equivalent which has a similar strength and transparency with the native cornea, seems to be a feasible way to solve the shortage of donated cornea. Electrospun collagen scaffolds are often fabricated and used as a tissue-engineered cornea, but the main drawback of poor mechanical properties make it unable to meet the requirement for surgery suture, which limits its clinical applications to a large extent. Aligned polyvinyl acetate (PVA)/collagen (PVA-COL) scaffolds were electrospun by mixing collagen and PVA to reinforce the mechanical strength of the collagen electrospun scaffold. Human keratocytes (HKs) and human corneal epithelial cells (HCECs) inoculated on aligned and random PVA-COL electrospun scaffolds adhered and proliferated well, and the aligned nanofibers induced orderly HK growth, indicating that the designed PVA-COL composite nanofibrous electrospun scaffold is suitable for application in tissue-engineered cornea.
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Affiliation(s)
- Zhengjie Wu
- Precision Medicine and Healthcare Research Center, Tsinghua-Berkeley Shenzhen Institute, Shenzhen 518055, China.
- Biomanufacturing Engineering Laboratory, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China.
| | - Bin Kong
- Precision Medicine and Healthcare Research Center, Tsinghua-Berkeley Shenzhen Institute, Shenzhen 518055, China.
- Biomanufacturing Engineering Laboratory, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China.
| | - Rui Liu
- Biomanufacturing Engineering Laboratory, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China.
| | - Wei Sun
- Precision Medicine and Healthcare Research Center, Tsinghua-Berkeley Shenzhen Institute, Shenzhen 518055, China.
- Biomanufacturing Engineering Laboratory, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China.
- Department of Mechanical Engineering and Mechanics, Tsinghua University, Beijing 100084, China.
- Department of Mechanical Engineering, Drexel University, Philadelphia, PA 19104, USA.
| | - Shengli Mi
- Biomanufacturing Engineering Laboratory, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China.
- Open FIESTA Center, Tsinghua University, Shenzhen 518055, China.
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39
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Mi S, Yi X, Du Z, Xu Y, Sun W. Construction of a liver sinusoid based on the laminar flow on chip and self-assembly of endothelial cells. Biofabrication 2018; 10:025010. [DOI: 10.1088/1758-5090/aaa97e] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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40
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Song H, Zhang J, Jiang Y, Gao H, Tang S, Mi S, Yu F, Meng Q, Xiao W, Zhang Q, Ding X. Genomic prediction for growth and reproduction traits in pig using an admixed reference population. J Anim Sci 2018; 95:3415-3424. [PMID: 28805914 DOI: 10.2527/jas.2017.1656] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
This study investigated the efficiency of genomic prediction using an admixed reference population comprising 3 Yorkshire populations with different genetic backgrounds. In total, 2,084 and 1,388 individuals with growth and reproduction records, respectively, were genotyped with a PorcineSNP80 marker panel. The corrected phenotypic values derived from conventional EBV of each population were taken as response variables. Three approaches, that is, a linear genomic BLUP (GBLUP) model, a Bayesian mixture model (BayesR), and single-step GBLUP (ssGBLUP), were implemented to predict genomic breeding values. Our results indicated that the accuracy of genomic prediction was increased by enlarging the reference population by admixing different populations. However, the improvement was lower than expected, because the relationships among individuals of different populations were not strong enough. Among the 3 approaches, for reproduction and growth traits, ssGBLUP produced 30 to approximately 38% and 23 to 31%, respectively, higher accuracy than GBLUP. And the ssGBLUP produced 28 to approximately 38% and 18 to approximately 31% higher accuracy than BayesR. In addition, ssGBLUP also yielded lower bias. In most situations, BayesR performed comparably to GBLUP for most traits. Our results indicated ssGBLUP using an admixed reference population is also meaningful for national joint genetic evaluation of Chinese pig breeding.
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41
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Guo Z, Mi S, Sun W. The multifaceted nature of catechol chemistry: bioinspired pH-initiated hyaluronic acid hydrogels with tunable cohesive and adhesive properties. J Mater Chem B 2018; 6:6234-6244. [DOI: 10.1039/c8tb01776j] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
By regulating pH, a series of bioinspired, pH-initiated hyaluronic acid hydrogels that possess tunable cohesive and adhesive properties were developed based on catechol-related chemistry.
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Affiliation(s)
- Zhongwei Guo
- Precision Medicine and Healthcare Research Center
- Tsinghua-Berkeley Shenzhen Institute
- Shenzhen
- China
- Biomanufacturing Engineering Laboratory
| | - Shengli Mi
- Biomanufacturing Engineering Laboratory
- Graduate School at Shenzhen
- Tsinghua University
- Shenzhen
- China
| | - Wei Sun
- Precision Medicine and Healthcare Research Center
- Tsinghua-Berkeley Shenzhen Institute
- Shenzhen
- China
- Biomanufacturing Engineering Laboratory
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42
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Liu X, Xie Y, Liu R, Zhang R, Yan H, Yang X, Huang Q, He W, Yu B, Feng Q, Mi S, Cai Q. A cyclo-trimer of acetonitrile combining fluorescent property with ability to induce osteogenesis and its potential as multifunctional biomaterial. Acta Biomater 2018; 65:163-173. [PMID: 29061377 DOI: 10.1016/j.actbio.2017.10.031] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Revised: 09/17/2017] [Accepted: 10/17/2017] [Indexed: 12/24/2022]
Abstract
A biomaterial combining fluorescent property with ability to induce osteogenesis can serve as an ideal multifunctional scaffold in bone tissue engineering. However, the frequently used fluorescent agents can only serve as imaging probes. The polymer or oligomer with a conjugated system containing nitrogen atoms will fulfill these criteria. In this study, a cyclo-trimer of acetonitrile is synthesized using a facile method, which is proved to be 4-amino-2,6-dimethylpyrimidine. The cyclo-trimer of acetonitrile demonstrates strong intrinsic photoluminescence and has the potential for in vivo imaging. The cyclo-trimer of acetonitrile shows no toxicity both in vitro and in vivo. Moreover, the cyclo-trimer of acetonitrile significantly promotes the osteogenesis of SaOS-2 cells by improving alkaline phosphatase activity, collagen type I and osteocalcin expression, as well as expressions of osteoblastic genes, and enhances the matrix mineralization of rBMSCs. Thus, the cyclo-trimer of acetonitrile synthesized in present study illustrates the employment of this kind multifunctional biomaterial in bone tissue engineering and may offer great potential in biomedical applications where bioimaging and osteogenesis are both required. STATEMENT OF SIGNIFICANCE A conjugated cyclo-trimer of acetonitrile combining intrinsic fluorescent property with ability to induce osteogenesis was reported. Different from the traditional fluorescent dye or quantum dots, which are just "imaging agents", the cyclo-trimer of acetonitrile can serve as a multifunctional biomaterial and offer great potential in biomedical applications where bioimaging and osteogenesis are both required. To our best knowledge, the fluorescent property, especially fluorescent property in vivo and the ability of this molecule to induce osteogenesis have not been reported before. Our work illustrates the employment of this kind multifunctional biomaterial in bone tissue engineering and will highlight the importance of multifunctional biomaterial in biomedical applications.
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43
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Mi S, Li B, Yi X, Xu Y, Du Z, Yang S, Li W, Sun W. An AC electrothermal self-circulating system with a minimalist process to construct a biomimetic liver lobule model for drug testing. RSC Adv 2018; 8:36987-36998. [PMID: 35557806 PMCID: PMC9089443 DOI: 10.1039/c8ra03724h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Accepted: 09/27/2018] [Indexed: 01/09/2023] Open
Abstract
Liver-on-chip, due to its precision and low cost for constructing in vitro models, has tremendous potential for drug toxicity testing and pathological studies.
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Affiliation(s)
- Shengli Mi
- Graduate School at Shenzhen
- Tsinghua University
- Shenzhen
- P. R. China
- Open FIESTA Center
| | - Baihan Li
- Graduate School at Shenzhen
- Tsinghua University
- Shenzhen
- P. R. China
| | - Xiaoman Yi
- Graduate School at Shenzhen
- Tsinghua University
- Shenzhen
- P. R. China
| | - Yuanyuan Xu
- Tsinghua-Berkeley Shenzhen Institute
- Shenzhen
- P. R. China
| | - Zhichang Du
- Graduate School at Shenzhen
- Tsinghua University
- Shenzhen
- P. R. China
| | - Shuaitao Yang
- Graduate School at Shenzhen
- Tsinghua University
- Shenzhen
- P. R. China
| | - Wei Li
- Department of Mechanical Engineering
- The University of Texas at Austin
- Austin
- USA
| | - Wei Sun
- Graduate School at Shenzhen
- Tsinghua University
- Shenzhen
- P. R. China
- Department of Mechanical Engineering and Mechanics
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44
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Yao H, Wang J, Mi S. Photo Processing for Biomedical Hydrogels Design and Functionality: A Review. Polymers (Basel) 2017; 10:E11. [PMID: 30966045 PMCID: PMC6415176 DOI: 10.3390/polym10010011] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Revised: 12/18/2017] [Accepted: 12/19/2017] [Indexed: 01/20/2023] Open
Abstract
A large number of opportunities for biomedical hydrogel design and functionality through photo-processing have stretched the limits of innovation. As both photochemical understanding and engineering technologies continue to develop, more complicated geometries and spatiotemporal manipulations can be realized through photo-exposure, producing multifunctional hydrogels with specific chemical, biological and physical characteristics for the achievement of biomedical goals. This report describes the role that light has recently played in the synthesis and functionalization of biomedical hydrogels and primarily the design of photoresponsive hydrogels via different chemical reactions (photo crosslinking and photo degradation) and conventional light curing processes (micropatterning, stereolithography and two/multiphoton techniques) as well as typical biomedical applications of the hydrogels (cell culture, differentiation and in vivo vascularization) and their promising future.
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Affiliation(s)
- Hongyi Yao
- Biomanufacturing Engineering Laboratory, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China.
| | - Jieqiong Wang
- Biomanufacturing Engineering Laboratory, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China.
| | - Shengli Mi
- Biomanufacturing Engineering Laboratory, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China.
- Open FIESTA Center, Tsinghua University, Shenzhen 518055, China.
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45
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Bao F, Mi S, Luo Q, Guo H, Tu C, Zhu G, Gong W. Retrospective study of porcine circovirus type 2 infection reveals a novel genotype PCV2f. Transbound Emerg Dis 2017; 65:432-440. [PMID: 28963755 DOI: 10.1111/tbed.12721] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Indexed: 11/30/2022]
Abstract
Porcine postweaning multisystemic wasting syndrome (PMWS) caused by porcine circovirus type 2 (PCV2) is a disease causing severe economic losses annually worldwide to the pig industry. PCV2 infection was first reported in China in 2000, and currently has three major genotypes, PCV2a, b and d, circulating in this country. To further elucidate the origin and prevalence of PCV2 in China, 123 clinical pig tissue samples collected in 25 provinces between 1990 and 1999 were analysed by PCV2-specific PCR, resulting in identification of 23 PCV2 strains collected between 1996 and 1999. Phylogenetic analysis based on the nucleotide sequences of open reading frame 2 (ORF2) showed that 20 of the 23 grouped within PCV2a, while the remaining three strains formed an independent clade, so far unreported and therefore named PCV2f. This genotype shared lower sequence identity with other known genotypes. This study provides further understanding of the genetic diversity and evolution of PCV2 and has tracked PCV2 infection in China back to 1996 rather than 2000.
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Affiliation(s)
- F Bao
- College of Veterinary Medicine and Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou, China.,Institute of Military Veterinary, Academy of Military Medical Sciences, Changchun, China
| | - S Mi
- Institute of Military Veterinary, Academy of Military Medical Sciences, Changchun, China
| | - Q Luo
- College of Veterinary Medicine and Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou, China
| | - H Guo
- Institute of Military Veterinary, Academy of Military Medical Sciences, Changchun, China
| | - C Tu
- Institute of Military Veterinary, Academy of Military Medical Sciences, Changchun, China.,Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, China
| | - G Zhu
- College of Veterinary Medicine and Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou, China
| | - W Gong
- Institute of Military Veterinary, Academy of Military Medical Sciences, Changchun, China
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46
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Liu C, Cheng X, Li B, Chen Z, Mi S, Lao C. Fabrication and Characterization of 3D-Printed Highly-Porous 3D LiFePO₄ Electrodes by Low Temperature Direct Writing Process. Materials (Basel) 2017; 10:ma10080934. [PMID: 28796182 PMCID: PMC5578300 DOI: 10.3390/ma10080934] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Revised: 08/04/2017] [Accepted: 08/08/2017] [Indexed: 11/16/2022]
Abstract
LiFePO₄ (LFP) is a promising cathode material for lithium-ion batteries. In this study, low temperature direct writing (LTDW)-based 3D printing was used to fabricate three-dimensional (3D) LFP electrodes for the first time. LFP inks were deposited into a low temperature chamber and solidified to maintain the shape and mechanical integrity of the printed features. The printed LFP electrodes were then freeze-dried to remove the solvents so that highly-porous architectures in the electrodes were obtained. LFP inks capable of freezing at low temperature was developed by adding 1,4 dioxane as a freezing agent. The rheological behavior of the prepared LFP inks was measured and appropriate compositions and ratios were selected. A LTDW machine was developed to print the electrodes. The printing parameters were optimized and the printing accuracy was characterized. Results showed that LTDW can effectively maintain the shape and mechanical integrity during the printing process. The microstructure, pore size and distribution of the printed LFP electrodes was characterized. In comparison with conventional room temperature direct ink writing process, improved pore volume and porosity can be obtained using the LTDW process. The electrochemical performance of LTDW-fabricated LFP electrodes and conventional roller-coated electrodes were conducted and compared. Results showed that the porous structure that existed in the printed electrodes can greatly improve the rate performance of LFP electrodes.
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Affiliation(s)
- Changyong Liu
- Additive Manufacturing Research Institute, College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen 518060, China.
| | - Xingxing Cheng
- Additive Manufacturing Research Institute, College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen 518060, China.
| | - Bohan Li
- Division of Advanced Manufacturing, Graduate School at Shenzhen, Tsinghua University, Beijing 518000, China.
| | - Zhangwei Chen
- Additive Manufacturing Research Institute, College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen 518060, China.
| | - Shengli Mi
- Division of Advanced Manufacturing, Graduate School at Shenzhen, Tsinghua University, Beijing 518000, China.
| | - Changshi Lao
- Additive Manufacturing Research Institute, College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen 518060, China.
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47
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Abstract
A picoliter pipetting technique using the microfluidic method is presented. Utilizing the hydrophobic self-assembled monolayer films patterned in microchannels as pressure-controlled valves, a small volume of liquid can be separated by a designed channel trap and then ejected from the channel end at a higher pressure. The liquid trap section is composed of a T-shaped channel junction and a hydrophobic patch. The liquid volume can be precisely controlled by varying the distance of the hydrophobic patch from the T-junction. By this means, liquid less than 100 pl can be separated and pipetted. The developed device is potentially useful for sample dispensing in biological, medical, and chemical applications.
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Affiliation(s)
- M Zhang
- Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China
| | - J Huang
- Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China
| | - X Qian
- Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China
| | - S Mi
- Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China
| | - X Wang
- Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China
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48
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Kong B, Sun W, Chen G, Tang S, Li M, Shao Z, Mi S. Tissue-engineered cornea constructed with compressed collagen and laser-perforated electrospun mat. Sci Rep 2017; 7:970. [PMID: 28428541 PMCID: PMC5430529 DOI: 10.1038/s41598-017-01072-0] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Accepted: 03/22/2017] [Indexed: 12/31/2022] Open
Abstract
While Plastic Compressed (PC) collagen technique is often used to fabricate bioengineered constructs, PC collagen gels are too weak to be sutured or conveniently handled for clinical applications. To overcome this limitation, electrospun poly (lactic-co-glycolide) (PLGA) mats, which have excellent biocompatibility and mechanical properties, were combined with PC collagen to fabricate sandwich-like hybrid constructs. By laser-perforating holes with different sizes and spacings in the electrospun mats to regulate the mechanical properties and light transmittance of the hybrid constructs, we produced hybrid constructs with properties very suitable to apply in corneal tissue engineering. The maximum tensile stress of the optimal hybrid construct was 3.42 ± 0.22 MPa. The light transmittance of the hybrid construct after perforation was approximately 15-fold higher than before, and light transmittance increased gradually with increasing time. After immersing into PBS for 7 days, the transmittance of the optimal construct changed from 63 ± 2.17% to 72 ± 1.8% under 500 nm wavelength. The live/dead staining, cell proliferation assay and immunohistochemistry study of human corneal epithelial cells (HCECs) and human keratocytes (HKs) cultured on the optimal hybrid construct both demonstrated that the cells adhered, proliferated, and maintained their phenotype well on the material. In addition, after culturing for 2 weeks, the HCECs could form stratified layers. Thus, our designed construct is suitable for the construction of engineered corneal tissue.
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Affiliation(s)
- Bin Kong
- Macromolecular Platforms for Translational Medicine and Bio-Manufacturing Laboratory, Tsinghua-Berkeley Shenzhen Insititute, Shenzhen, 518055, P.R. China
| | - Wei Sun
- Macromolecular Platforms for Translational Medicine and Bio-Manufacturing Laboratory, Tsinghua-Berkeley Shenzhen Insititute, Shenzhen, 518055, P.R. China.,Biomanufacturing Engineering Laboratory, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, P.R. China.,Department of Mechanical Engineering, Drexel University, Philadelphia, PA, USA
| | - Guoshi Chen
- Yantai SunPu Ruiyuan biological technology co., LTD., Yantai, 265500, P.R. China
| | - Song Tang
- Shenzhen eye hospital, Shenzhen, 518000, P.R. China
| | - Ming Li
- Shenzhen eye hospital, Shenzhen, 518000, P.R. China
| | - Zengwu Shao
- Tongji Medical Collage, Huazhong University Science & Technology, Wuhan, 430022, P.R. China
| | - Shengli Mi
- Biomanufacturing Engineering Laboratory, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, P.R. China. .,Open FIESTA Center, Tsinghua University, Shenzhen, 518055, P.R. China.
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Mi S, Zhang LM. [Effect of oxygen tubing connection site on percutaneous oxygen partial pressure and percutaneous carbon dioxide partial pressure in patients with chronic obstructive pulmonary disease during noninvasive positive pressure ventilation]. Zhonghua Jie He He Hu Xi Za Zhi 2017; 40:267-271. [PMID: 28395405 DOI: 10.3760/cma.j.issn.1001-0939.2017.04.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Objective: We evaluated the effects of administering oxygen through nasal catheters inside the mask or through the mask on percutaneous oxygen partial pressure (PcO(2))and percutaneous carbon dioxide partial pressure (PcCO(2)) during noninvasive positive pressure ventilation (NPPV) to find a better way of administering oxygen, which could increase PcO(2) by increasing the inspired oxygen concentration. Methods: Ten healthy volunteers and 9 patients with chronic obstructive pulmonary disease complicated by type Ⅱ respiratory failure were included in this study. Oxygen was administered through a nasal catheter inside the mask or through the mask (oxygen flow was 3 and 5 L/min) during NPPV. PcO(2) and PcCO(2) were measured to evaluate the effects of administering oxygen through a nasal catheter inside the mask or through the mask, indirectly reflecting the effects of administering oxygen through nasal catheter inside the mask or through the mask on inspired oxygen concentration. Results: Compared to administering oxygen through the mask during NPPV, elevated PcO(2) was measured in administering oxygen through the nasal catheter inside the mask, and the differences were statistically significant (P<0.05). At the same time, there was no significant change in PcCO(2) (P>0.05). Conclusion: Administering oxygen through a nasal catheter inside the mask during NPPV increased PcO(2) by increasing the inspired oxygen concentration but did not increase PcCO(2). This method of administering oxygen could conserve oxygen and be suitable for family NPPV. Our results also provided theoretical basis for the development of new masks.
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Affiliation(s)
- S Mi
- Affiliated Beijing Chaoyang Hospital of Capital Medical University Beijing Institute of Respiratory Medicine, Beijing 100043, China
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Song H, Zhang J, Jiang Y, Gao H, Tang S, Mi S, Yu F, Meng Q, Xiao W, Zhang Q, Ding X. Genomic prediction for growth and reproduction traits in pig using an admixed reference population. J Anim Sci 2017. [DOI: 10.2527/jas2017.1656] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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