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Mohamed Mokhtarudin MJ, Wan Abd. Naim WN, Shabudin A, Payne SJ. Multiscale modelling of brain tissue oxygen and glucose dynamics in tortuous capillary during ischaemia-reperfusion. APPLIED MATHEMATICAL MODELLING 2022; 109:358-373. [DOI: 10.1016/j.apm.2022.04.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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Wang S, Suhaimi H, Mabrouk M, Georgiadou S, Ward JP, Das DB. Effects of Scaffold Pore Morphologies on Glucose Transport Limitations in Hollow Fibre Membrane Bioreactor for Bone Tissue Engineering: Experiments and Numerical Modelling. MEMBRANES 2021; 11:membranes11040257. [PMID: 33918241 PMCID: PMC8065773 DOI: 10.3390/membranes11040257] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Revised: 03/30/2021] [Accepted: 03/31/2021] [Indexed: 12/11/2022]
Abstract
In the current research, three electrospun polycaprolactone (PCL) scaffolds with different pore morphology induced by changing the electrospinning parameters, spinning time and rate, have been prepared in order to provide a fundamental understanding on the effects pore morphology have on nutrient transport behaviour in hollow fibre membrane bioreactor (HFMB). After determining the porosity of the scaffolds, they were investigated for glucose diffusivity using cell culture media (CCM) and distilled water in a diffusion cell at 37 °C. The scanning electron microscope (SEM) images of the microstructure of the scaffolds were analysed further using ImageJ software to determine the porosity and glucose diffusivity. A Krogh cylinder model was used to determine the glucose transport profile with dimensionless variables within the HFMB. The paper discusses the roles of various dimensionless numbers (e.g., Péclet and Damköhler numbers) and non-dimensional groups of variables (e.g., non-dimensional fibre radius) on determining glucose concentration profiles, especially in the scaffold region. A negative linear relationship between glucose diffusivities across PCL scaffolds and the minimum glucose concentrations (i.e., concentration on the outer fibre edge on the outlet side (at z = 1 and r = 3.2) was also found. It was shown that the efficiency of glucose consumption improves with scaffolds of higher diffusivities. The results of this study are expected to help in optimizing designs of HFMB as well as carry out more accurate up scaling analyses for the bioreactor.
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Affiliation(s)
- Shuai Wang
- Department of Chemical Engineering, Loughborough University, Loughborough LE113TU, UK; (S.W.); (H.S.); (M.M.); (S.G.)
| | - Hazwani Suhaimi
- Department of Chemical Engineering, Loughborough University, Loughborough LE113TU, UK; (S.W.); (H.S.); (M.M.); (S.G.)
| | - Mostafa Mabrouk
- Department of Chemical Engineering, Loughborough University, Loughborough LE113TU, UK; (S.W.); (H.S.); (M.M.); (S.G.)
- Refractories, Ceramics and Building Materials Department, National Research Centre, 33El Bohouth St. (former EL Tahrir St.), Dokki, Giza P.O. Box 12622, Egypt
| | - Stella Georgiadou
- Department of Chemical Engineering, Loughborough University, Loughborough LE113TU, UK; (S.W.); (H.S.); (M.M.); (S.G.)
| | - John P. Ward
- Department of Mathematical Sciences, Loughborough University, Loughborough LE113TU, UK;
| | - Diganta B. Das
- Department of Chemical Engineering, Loughborough University, Loughborough LE113TU, UK; (S.W.); (H.S.); (M.M.); (S.G.)
- Correspondence: ; Tel.: +44-1-509-222-509
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FITC-Dextran Release from Cell-Embedded Fibrin Hydrogels. Biomolecules 2021; 11:biom11020337. [PMID: 33672379 PMCID: PMC7926394 DOI: 10.3390/biom11020337] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 02/12/2021] [Accepted: 02/19/2021] [Indexed: 02/07/2023] Open
Abstract
Fibrin hydrogel is a central biological material in tissue engineering and drug delivery applications. As such, fibrin is typically combined with cells and biomolecules targeted to the regenerated tissue. Previous studies have analyzed the release of different molecules from fibrin hydrogels; however, the effect of embedded cells on the release profile has yet to be quantitatively explored. This study focused on the release of Fluorescein isothiocyanate (FITC)-dextran (FD) 250 kDa from fibrin hydrogels, populated with different concentrations of fibroblast or endothelial cells, during a 48-h observation period. The addition of cells to fibrin gels decreased the overall release by a small percentage (by 7-15% for fibroblasts and 6-8% for endothelial cells) relative to acellular gels. The release profile was shown to be modulated by various cellular activities, including gel degradation and physical obstruction to diffusion. Cell-generated forces and matrix deformation (i.e., densification and fiber alignment) were not found to significantly influence the release profiles. This knowledge is expected to improve fibrin integration in tissue engineering and drug delivery applications by enabling predictions and ways to modulate the release profiles of various biomolecules.
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Suhaimi H, Ward JP, Das DB. On modelling of glucose transport in hollow fibre membrane bioreactor for growing three‐dimensional tissue. ASIA-PAC J CHEM ENG 2021. [DOI: 10.1002/apj.2565] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Hazwani Suhaimi
- Department of Chemical Engineering Loughborough University Leicestershire UK
| | - John Peter Ward
- Department of Mathematical Sciences Loughborough University Leicestershire UK
| | - Diganta Bhusan Das
- Department of Chemical Engineering Loughborough University Leicestershire UK
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Chen Q, Wang Y. The application of three-dimensional cell culture in clinical medicine. Biotechnol Lett 2020; 42:2071-2082. [PMID: 32935182 DOI: 10.1007/s10529-020-03003-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Accepted: 09/07/2020] [Indexed: 11/25/2022]
Abstract
Three-dimensional cell culture technology is a novel cell culture technology, which can simulate the growth state of cells in vivo by scaffolds or special devices. Cells can form tissues or organs in vitro. It combines some advantages of traditional cell experiments and animal model experiments. Because of its advantages, it is widely used in clinical medical research, including research on stem cell differentiation, research on cell behavior, migration and invasion, study on microenvironment, study on drug sensitivity and radio-sensitivity of tumor cells, etc. In this paper, the evolution and classification of three-dimensional cell culture are reviewed, also the advantages and shortages are compared. The application of three-dimensional cell culture in clinical medicine are summarized to provide an insight into translational medicine.
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Affiliation(s)
- Qiao Chen
- Department of Plastic Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Shuaifuyuan No 1, Dongcheng District, Beijing, 100730, China
| | - Youbin Wang
- Department of Plastic Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Shuaifuyuan No 1, Dongcheng District, Beijing, 100730, China.
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Offeddu GS, Mohee L, Cameron RE. Scale and structure dependent solute diffusivity within microporous tissue engineering scaffolds. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2020; 31:46. [PMID: 32367247 PMCID: PMC7198636 DOI: 10.1007/s10856-020-06381-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Accepted: 04/13/2020] [Indexed: 05/31/2023]
Abstract
Diffusion of nutrients to cells cultured within three-dimensional scaffolds is fundamental for cell survival during development of the tissue construct, when no vasculature is present to aid transport. Significant efforts have been made to characterize the effect of structure on solute diffusivity in nanoporous hydrogels, yet a similar thorough characterization has not been attempted for microporous scaffolds. Here, we make use of freeze-dried collagen scaffolds, possessing pore sizes in the range 150-250 μm and isotropic or aligned morphology, to study the diffusivity of fluorescent dextran molecules. Fluorescence recovery after photobleaching is used to measure the self diffusivity of the solutes within single pores, while Fickian diffusion over scales larger than the pore size is studied by assessing the solute concentration profile within the materials over time. We show that, not only do the morphological parameters of the scaffolds significantly affect the diffusivity of the solutes, but also that the assessment of such diffusivity depends on the length scale of diffusion of the molecules under investigation, with the resulting diffusion coefficients being differently affected by the scaffold structure. The results provided can guide the design of scaffolds with tailored diffusivity and nutrient concentration profiles.
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Affiliation(s)
- Giovanni S Offeddu
- Cambridge Centre for Medical Materials, Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Rd, Cambridge, CB3 0FS, UK
| | - Lakshana Mohee
- Cambridge Centre for Medical Materials, Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Rd, Cambridge, CB3 0FS, UK
| | - Ruth E Cameron
- Cambridge Centre for Medical Materials, Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Rd, Cambridge, CB3 0FS, UK.
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Torabi S, Li L, Grabau J, Sands M, Berron BJ, Xu R, Trinkle CA. Cassie-Baxter Surfaces for Reversible, Barrier-Free Integration of Microfluidics and 3D Cell Culture. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:10299-10308. [PMID: 31291112 PMCID: PMC6996068 DOI: 10.1021/acs.langmuir.9b01163] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
3D cell culture and microfluidics both represent powerful tools for replicating critical components of the cell microenvironment; however, challenges involved in the integration of the two and compatibility with standard tissue culture protocols still represent a steep barrier to widespread adoption. Here we demonstrate the use of engineered surface roughness in the form of microfluidic channels to integrate 3D cell-laden hydrogels and microfluidic fluid delivery. When a liquid hydrogel precursor solution is pipetted onto a surface containing open microfluidic channels, the solid/liquid/air interface becomes pinned at sharp edges such that the hydrogel forms the "fourth wall" of the channels upon solidification. We designed Cassie-Baxter microfluidic surfaces that leverage this phenomenon, making it possible to have barrier-free diffusion between the channels and the hydrogel; in addition, sealing is robust enough to prevent leakage between the two components during fluid flow, but the sealing can also be reversed to facilitate recovery of the cell/hydrogel material after culture. This method was used to culture MDA-MB-231 cells in collagen, which remained viable and proliferated while receiving media exclusively through the microfluidic channels over the course of several days.
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Affiliation(s)
- Soroosh Torabi
- Mechanical Engineering , University of Kentucky , Lexington , Kentucky 40506 , United States
| | - Linzhang Li
- Pharmacology and Nutritional Sciences , University of Kentucky , Lexington , Kentucky 40536 , United States
- Markey Cancer Center , University of Kentucky , Lexington , Kentucky 40508 , United States
| | - Jonathan Grabau
- Mechanical Engineering , University of Kentucky , Lexington , Kentucky 40506 , United States
| | - Madison Sands
- Pharmacology and Nutritional Sciences , University of Kentucky , Lexington , Kentucky 40536 , United States
- Markey Cancer Center , University of Kentucky , Lexington , Kentucky 40508 , United States
| | - Brad J Berron
- Chemical and Materials Engineering , University of Kentucky , Lexington , Kentucky 40506 , United States
| | - Ren Xu
- Pharmacology and Nutritional Sciences , University of Kentucky , Lexington , Kentucky 40536 , United States
- Markey Cancer Center , University of Kentucky , Lexington , Kentucky 40508 , United States
| | - Christine A Trinkle
- Mechanical Engineering , University of Kentucky , Lexington , Kentucky 40506 , United States
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