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Zhang T, Yan Y, Wang X, Xiong Z, Lin F, Wu R, Zhang R. Three-dimensional Gelatin and Gelatin/Hyaluronan Hydrogel Structures for Traumatic Brain Injury. J BIOACT COMPAT POL 2016. [DOI: 10.1177/0883911506074025] [Citation(s) in RCA: 92] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Brain tissue engineering has now emerged as one of the most promising treatments for the traumatic brain injury. In this article, two groups of three-dimensional (3D) hydrogel structures composed of gelatin and gelatin/hyaluronan have been formed using our 3D cell assembly technique for in vivo study in rats, in order to investigate their effects in reparation of injury in the central nervous system (CNS). The structures were implanted into cortical defects created in rat brains, and their abilities to improve the brain tissue reconstruction were then evaluated. After 4, 8, 10, and 13 weeks of implantation, sections of brains were processed with NISSL staining for observing the immigration of host neural cells into the implanted materials and the degradation property of the materials. The results showed that simplex gelatin and gelatin/hyaluronan (20:1) with 3D structures both have good biocompatibility with brain tissue while gelatin/hyaluronan has a better contiguity with the surrounding tissue. Through our primary study, it seems that 3D gelatin/hyaluronan structures may be useful in brain tissue repair.
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Affiliation(s)
- Ting Zhang
- Key Laboratory for Advanced Manufacturing by Materials Processing Technology and Center of Organ Manufacturing, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, P.R. China and Institute of Life Science & Medicine, Tsinghua University, Beijing 100084, P.R. China
| | - Yongnian Yan
- Key Laboratory for Advanced Manufacturing by Materials Processing Technology and Center of Organ Manufacturing, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, P.R. China and Institute of Life Science & Medicine, Tsinghua University, Beijing 100084, P.R. China
| | - Xiaohong Wang
- Key Laboratory for Advanced Manufacturing by Materials Processing Technology and Center of Organ Manufacturing, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, P.R. China and Institute of Life Science & Medicine, Tsinghua University, Beijing 100084, P.R. China,
| | - Zhuo Xiong
- Key Laboratory for Advanced Manufacturing by Materials Processing Technology and Center of Organ Manufacturing, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, P.R. China and Institute of Life Science & Medicine, Tsinghua University, Beijing 100084, P.R. China
| | - Feng Lin
- Key Laboratory for Advanced Manufacturing by Materials Processing Technology and Center of Organ Manufacturing, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, P.R. China and Institute of Life Science & Medicine, Tsinghua University, Beijing 100084, P.R. China
| | - Rendong Wu
- Key Laboratory for Advanced Manufacturing by Materials Processing Technology and Center of Organ Manufacturing, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, P.R. China and Institute of Life Science & Medicine, Tsinghua University, Beijing 100084, P.R. China
| | - Renji Zhang
- Key Laboratory for Advanced Manufacturing by Materials Processing Technology and Center of Organ Manufacturing, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, P.R. China and Institute of Life Science & Medicine, Tsinghua University, Beijing 100084, P.R. China
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Gross BC, Erkal JL, Lockwood SY, Chen C, Spence DM. Evaluation of 3D printing and its potential impact on biotechnology and the chemical sciences. Anal Chem 2014; 86:3240-53. [PMID: 24432804 DOI: 10.1021/ac403397r] [Citation(s) in RCA: 739] [Impact Index Per Article: 73.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Nearing 30 years since its introduction, 3D printing technology is set to revolutionize research and teaching laboratories. This feature encompasses the history of 3D printing, reviews various printing methods, and presents current applications. The authors offer an appraisal of the future direction and impact this technology will have on laboratory settings as 3D printers become more accessible.
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Affiliation(s)
- Bethany C Gross
- Department of Chemistry, Michigan State University , 578 South Shaw Lane, East Lansing, Michigan 48824, United States
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Abstract
Tissue scaffolds play a vital role in tissue engineering by providing a native tissue-mimicking environment for cell proliferation and differentiation as well as tissue regeneration. Fabrication of tissue scaffolds has been drawing increasing research attention and a number of fabrication techniques have been developed. To better mimic the microenvironment of native tissues, novel techniques have emerged in recent years to encapsulate cells into the engineered scaffolds during the scaffold fabrication process. Among them, bio-Rapid-Prototyping (bioRP) techniques, by which scaffolds with encapsulated cells can be fabricated with controlled internal microstructure and external shape, shows significant promise. It is noted in the bioRP processes, cells may be continuously subjected to environmental stresses such as mechanical, electrical forces and laser exposure. If the stress is greater than a certain level, the cell membrane may be ruptured, leading to the so-called process-induced cell damage. This paper reviews various cell encapsulation techniques for tissue scaffold fabrication, with emphasis on the bioRP technologies and their technical features. To understand the process-induced cell damage in the bioRP processes, this paper also surveys the cell damage mechanisms under different stresses. The process-induced cell damage models are also examined to provide a cue to the cell viability preservation in the fabrication process. Discussions on further improvements of bioRP technologies are given and ongoing research into mechanical cell damage mechanism are also suggested in this review.
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Liu H, Li S, Yan Y, Wang X, Lin F, Zhang R. A liver analog construct for use as an alcoholic liver disease model. ACTA ACUST UNITED AC 2012. [DOI: 10.1007/s11434-012-4976-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Li MG, Tian XY, Chen XB. A brief review of dispensing-based rapid prototyping techniques in tissue scaffold fabrication: role of modeling on scaffold properties prediction. Biofabrication 2009; 1:032001. [DOI: 10.1088/1758-5082/1/3/032001] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Li S, Yan Y, Xiong Z, Zhang CWR, Wang X. Gradient Hydrogel Construct Based on an Improved Cell Assembling System. J BIOACT COMPAT POL 2009. [DOI: 10.1177/0883911509103357] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In this study, a two-step crosslinking method derived from commercial rapid prototyping equipment was used to fabricate a gradient hydrogel scaffold in vitro. This system contained two types of nozzles; one was double-nozzle unit, used for relatively simple gradient hydrogel scaffold composed of two nonmiscible hydrogel materials. The other was single nozzle that was used for mixing a gradient hydrogel scaffold composed of two types of hydrogel materials. Different types of scaffolds were formed by modifying the gradient in one of the relevant nozzles. To improve the extrusion controlling effect, accessorial parameters were introduced. A 3D gradient construct containing neuron cells and Schwann cells was fabricated and cultured for 7 days. This construct was helpful in designing a gradient mode to observe the relationship between different cells in vitro. This work has improved tissue-engineering techniques for later manufacturing of very complicated organ analogs.
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Affiliation(s)
- Shengjie Li
- Center of Organ Manufacturing, Department of Mechanical Engineering Tsinghua University, Beijing 100084, P.R. China
- Key Laboratory for Advanced Materials Processing Technology Ministry of Education, Beijing 100084, P.R. China
| | - Yongnian Yan
- Center of Organ Manufacturing, Department of Mechanical Engineering Tsinghua University, Beijing 100084, P.R. China
- Key Laboratory for Advanced Materials Processing Technology Ministry of Education, Beijing 100084, P.R. China
| | - Zhuo Xiong
- Center of Organ Manufacturing, Department of Mechanical Engineering Tsinghua University, Beijing 100084, P.R. China
- Key Laboratory for Advanced Materials Processing Technology Ministry of Education, Beijing 100084, P.R. China
| | - Chenyang Weng Renji Zhang
- Center of Organ Manufacturing, Department of Mechanical Engineering Tsinghua University, Beijing 100084, P.R. China
- Key Laboratory for Advanced Materials Processing Technology Ministry of Education, Beijing 100084, P.R. China
| | - Xiaohong Wang
- Center of Organ Manufacturing, Department of Mechanical Engineering Tsinghua University, Beijing 100084, P.R. China
- Key Laboratory for Advanced Materials Processing Technology Ministry of Education, Beijing 100084, P.R. China
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Shengjie Li, Zhuo Xiong, Xiaohong Wang, Yongnian Yan, Haixia Liu, Renji Zhang. Direct Fabrication of a Hybrid Cell/Hydrogel Construct by a Double-nozzle Assembling Technology. J BIOACT COMPAT POL 2009. [DOI: 10.1177/0883911509104094] [Citation(s) in RCA: 123] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Assembling multitype cells and biomimic extracellular matrix materials in a single construct is a promising method to regenerate complex tissues/organs in vitro. A new double-nozzle assembling technique was used to fabricate a hybrid cell/hydrogel construct with a vascular-like network to perform as a mass exchange conduit. Using a digital model to mimic an anatomical liver structure, adipose-derived stromal cells (ADSC) were combined within a gelatin/alginate/fibrinogen hydrogel to form a vascular-like network and hepatocytes combined gelatin/alginate/chitosan were placed around it. The construct was stabilized in a thrombin/CaCl2/Na5P3O10 solution after assembly. The ADSC were induced to differentiate into endothelial-like cells with endothelial growth factor. The albumin secretion level of the embedded hepatocytes increased during the 2 weeks culture, while the levels of urea and alanine transaminase were decreased after an increasing profile. These preliminary results indicate that this double-nozzle assembling technique could be a powerful tool for fabricating complex constructs with special intrinsic/ extrinsic structures. This technology has the potential to be widely used in medical regeneration and drug screening.
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Affiliation(s)
- Shengjie Li
- Key Laboratory for Advanced Materials Processing Technology Ministry of Education & Center of Organ Manufacturing, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, P.R. China, Institute of Life Science & Medicine, Tsinghua University Beijing 100084, P.R. China
| | - Zhuo Xiong
- Key Laboratory for Advanced Materials Processing Technology Ministry of Education & Center of Organ Manufacturing, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, P.R. China, Institute of Life Science & Medicine, Tsinghua University Beijing 100084, P.R. China
| | - Xiaohong Wang
- Key Laboratory for Advanced Materials Processing Technology Ministry of Education & Center of Organ Manufacturing, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, P.R. China, , Institute of Life Science & Medicine, Tsinghua University Beijing 100084, P.R. China
| | - Yongnian Yan
- Key Laboratory for Advanced Materials Processing Technology Ministry of Education & Center of Organ Manufacturing, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, P.R. China, Institute of Life Science & Medicine, Tsinghua University Beijing 100084, P.R. China
| | - Haixia Liu
- Key Laboratory for Advanced Materials Processing Technology Ministry of Education & Center of Organ Manufacturing, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, P.R. China, Institute of Life Science & Medicine, Tsinghua University Beijing 100084, P.R. China
| | - Renji Zhang
- Key Laboratory for Advanced Materials Processing Technology Ministry of Education & Center of Organ Manufacturing, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, P.R. China, Institute of Life Science & Medicine, Tsinghua University Beijing 100084, P.R. China
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Wang X, Yan Y, Zhang R. Rapid prototyping as a tool for manufacturing bioartificial livers. Trends Biotechnol 2007; 25:505-13. [PMID: 17949840 DOI: 10.1016/j.tibtech.2007.08.010] [Citation(s) in RCA: 98] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2007] [Revised: 07/25/2007] [Accepted: 08/31/2007] [Indexed: 12/20/2022]
Abstract
Rapid prototyping (RP) technologies are a set of manufacturing processes that can produce very complex structures directly from computer-aided design models without structure-specific tools or knowledge. These technologies might eventually enable the manufacture of human livers to create functional substitutes for treating liver failure or dysfunctionality. However, the approaches used currently face many challenges, such as the complex branched vascular and bile ductular systems and the variety of cell types, matrices and regulatory factors involved in liver development. Here, we discuss the challenges and provide evidence for the usefulness of RP in overcoming them.
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Affiliation(s)
- Xiaohong Wang
- Key Laboratory for Advanced Materials Processing Technology, Ministry of Education & Center of Organ Manufacturing, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, P.R. China.
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