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Shi F, Duan K, Yang Z, Liu Y, Weng J. Improved cell seeding efficiency and cell distribution in porous hydroxyapatite scaffolds by semi-dynamic method. Cell Tissue Bank 2021; 23:313-324. [PMID: 34251541 DOI: 10.1007/s10561-021-09945-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Accepted: 06/28/2021] [Indexed: 11/26/2022]
Abstract
Tissue engineering is a promising technique for the repair of bone defects. An efficient and homogeneous distribution of cell seeding into scaffold is a crucial but challenging step in the technique. Murine bone marrow mesenchymal stem cells were seeded into porous hydroxyapatite scaffolds of two morphologies by three methods: static seeding, semi-dynamic seeding, or dynamic perfusion seeding. Seeding efficiency, survival, distribution, and proliferation were quantitatively evaluated. To investigate the performance of the three seeding methods for larger/thicker scaffolds as well as batch seeding of numerous scaffolds, three scaffolds were stacked to form assemblies, and seeding efficiencies and cell distribution were analyzed. The semi-dynamic seeding and static seeding methods produced significantly higher seeding efficiencies, vitalities, and proliferation than did the dynamic perfusion seeding. On the other hand, the semi-dynamic seeding and dynamic perfusion seeding methods resulted in more homogeneous cell distribution than did the static seeding. For stacked scaffold assemblies, the semi-dynamic seeding method also created superior seeding efficiency and longitudinal cell distribution homogeneity. The semi-dynamic seeding method combines the high seeding efficiency of static seeding and satisfactory distribution homogeneity of dynamic seeding while circumventing their disadvantages. It may contribute to improved outcomes of bone tissue engineering.
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Affiliation(s)
- Feng Shi
- Collaboration and Innovation Center of Tissue Repair Material Engineering Technology, China West Normal University, Nanchong, 637009, Sichuan, China
- College of Life Science, China West Normal University, Nanchong, 637009, Sichuan, China
| | - Ke Duan
- Sichuan Provincial Laboratory of Orthopaedic Engineering, Department of Orthopaedics, The Affiliated Hospital of Southwest Medical University, Luzhou, 646000, Sichuan, China
| | - Zaijun Yang
- Collaboration and Innovation Center of Tissue Repair Material Engineering Technology, China West Normal University, Nanchong, 637009, Sichuan, China
- College of Life Science, China West Normal University, Nanchong, 637009, Sichuan, China
| | - Yumei Liu
- Collaboration and Innovation Center of Tissue Repair Material Engineering Technology, China West Normal University, Nanchong, 637009, Sichuan, China.
- College of Environmental Science and Engineering, China West Normal University, Nanchong, 637009, Sichuan, China.
| | - Jie Weng
- China Key Laboratory of Advanced Technologies of Materials, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, Sichuan, China.
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Blaudez F, Ivanovski S, Ipe D, Vaquette C. A comprehensive comparison of cell seeding methods using highly porous melt electrowriting scaffolds. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 117:111282. [PMID: 32919643 DOI: 10.1016/j.msec.2020.111282] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 06/30/2020] [Accepted: 07/08/2020] [Indexed: 12/30/2022]
Abstract
Cell seeding is challenging in the case of additively manufactured 3-dimensional scaffolds, as the open macroscopic pore network impedes the retention of the seeding solution. The present study aimed at comparing several seeding conditions (no fetal bovine serum, 10% or 100% serum) and methods (Static seeding in Tissue Culture Treated plate (CT), Static seeding of the MES in non-Culture Treated plate (nCT), Seeding in nCT plate placed on an orbital shaker at 20 rpm (nCTR), Static seeding of the MES previously incubated with 100% FBS for 1 h to allow for protein adsorption (FBS)) commonly utilised in tissue engineering using highly porous melt electrowritten scaffolds, assessing their seeding efficacy, cell distribution homogeneity and reproducibility. Firstly, we demonstrated that the incubation in 100% serum was superior to the 10% serum pre-incubation and that 1 h only was sufficient to obtain enhanced cell attachment. We further compared this technique to the other methods and demonstrated significant and beneficial impact of the 100% serum pre-incubation, which resulted in enhanced efficacy, homogeneous cell distribution and high reproducibility, leading to accelerated colonisation/maturation of the tissue engineered constructs. We further showed the superior performance of this method using 3D-printed scaffolds also made of different polymers, demonstrating its capacity for up-scaling. Therefore, the pre-incubation of the scaffold in 100% serum is a simple yet highly effective method for enhancing cell adhesion and ensuring seeding reproducibility. This is crucial for tissue engineering applications, especially when cell availability is scarce, and for product standardisation from a translational perspective.
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Affiliation(s)
- Fanny Blaudez
- School of Dentistry and Oral Health, Gold Coast campus, Griffith University, QLD 4222, Australia
| | - Saso Ivanovski
- The University of Queensland, School of Dentistry, Herston, Queensland, Australia
| | - Deepak Ipe
- School of Dentistry and Oral Health, Gold Coast campus, Griffith University, QLD 4222, Australia
| | - Cedryck Vaquette
- The University of Queensland, School of Dentistry, Herston, Queensland, Australia.
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Aure RRL, Bernido CC, Carpio-Bernido MV, Bacabac RG. Damped White Noise Diffusion with Memory for Diffusing Microprobes in Ageing Fibrin Gels. Biophys J 2019; 117:1029-1036. [PMID: 31495446 PMCID: PMC6818180 DOI: 10.1016/j.bpj.2019.08.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 08/11/2019] [Accepted: 08/14/2019] [Indexed: 02/03/2023] Open
Abstract
From observations of colloidal tracer particles in fibrin undergoing gelation, we introduce an analytical framework that allows the determination of the probability density function for a stochastic process beyond fractional Brownian motion. Using passive microrheology via videomicroscopy, mean square displacements of tracer particles suspended in fibrin at different ageing times are obtained. The anomalous diffusion is then described by a damped white noise process with memory, with analytical results closely matching experimental plots of mean square displacements and probability density function. We further show that the white noise functional stochastic approach applied to passive microrheology reveals the existence of a gelation parameter μ which elucidates the dynamics of constrained tracer particles embedded in a time-dependent soft material. In addition, we found that microstructural heterogeneity of particle environments decreases as the ageing time increases. This study offers experimental insights on the ageing of fibrin gels while presenting a white noise functional stochastic approach that could be applied to other systems exhibiting non-Markovian diffusive behavior.
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Affiliation(s)
- Rev R L Aure
- Medical Biophysics Group, Department of Physics, University of San Carlos, Cebu City, Philippines; Department of Mathematics and Physics, Visayas State University, Baybay City, Leyte, Philippines
| | - Christopher C Bernido
- Theoretical and Computational Sciences and Engineering Group, Department of Physics, University of San Carlos, Cebu City, Philippines; Research Center for Theoretical Physics, Central Visayan Institute Foundation, Jagna, Bohol, Philippines.
| | - M Victoria Carpio-Bernido
- Theoretical and Computational Sciences and Engineering Group, Department of Physics, University of San Carlos, Cebu City, Philippines; Research Center for Theoretical Physics, Central Visayan Institute Foundation, Jagna, Bohol, Philippines
| | - Rommel G Bacabac
- Medical Biophysics Group, Department of Physics, University of San Carlos, Cebu City, Philippines
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