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Das D, Lawrence WR, Diaz-Starokozheva L, Salazar-Puerta A, Ott N, Goebel ER, Damughtala A, Vidal P, Gallentine S, Moore JT, Kayuha D, Mendonca NC, Albert JB, Houser R, Johnson J, Powell H, Higuita-Castro N, Stanford KI, Gallego-Perez D. Injectable pulverized electrospun poly(lactic-co-glycolic acid) fibers improve human adipose tissue engraftment and volume retention. J Biomed Mater Res A 2023; 111:1722-1733. [PMID: 37326365 PMCID: PMC10527741 DOI: 10.1002/jbm.a.37581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 05/08/2023] [Accepted: 05/31/2023] [Indexed: 06/17/2023]
Abstract
Autologous adipose tissue is commonly used for tissue engraftment for the purposes of soft tissue reconstruction due to its relative abundance in the human body and ease of acquisition using liposuction methods. This has led to the adoption of autologous adipose engraftment procedures that allow for the injection of adipose tissues to be used as a "filler" for correcting cosmetic defects and deformities in soft tissues. However, the clinical use of such methods has several limitations, including high resorption rates and poor cell survivability, which lead to low graft volume retention and inconsistent outcomes. Here, we describe a novel application of milled electrospun poly(lactic-co-glycolic acid) (PLGA) fibers, which can be co-injected with adipose tissue to improve engraftment outcomes. These PLGA fibers had no significant negative impact on the viability of adipocytes in vitro and did not elicit long-term proinflammatory responses in vivo. Furthermore, co-delivery of human adipose tissue with pulverized electrospun PLGA fibers led to significant improvements in reperfusion, vascularity, and retention of graft volume compared to injections of adipose tissue alone. Taken together, the use of milled electrospun fibers to enhance autologous adipose engraftment techniques represents a novel approach for improving upon the shortcomings of such methods.
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Affiliation(s)
- Devleena Das
- Department of Biomedical Engineering, The Ohio State University, Columbus, OH, USA
| | - William R. Lawrence
- Biomedical Sciences Graduate Program, The Ohio State University College of Medicine, Columbus, OH, USA
| | - Ludmila Diaz-Starokozheva
- Department of Biomedical Engineering, The Ohio State University, Columbus, OH, USA
- Department of Surgery, The Ohio State University, Columbus, OH, USA
| | - Ana Salazar-Puerta
- Department of Biomedical Engineering, The Ohio State University, Columbus, OH, USA
| | - Neil Ott
- Department of Biomedical Engineering, The Ohio State University, Columbus, OH, USA
| | - Erin R. Goebel
- Department of Biomedical Engineering, The Ohio State University, Columbus, OH, USA
| | - Abhishek Damughtala
- Department of Biomedical Engineering, The Ohio State University, Columbus, OH, USA
| | - Pablo Vidal
- Department of Physiology and Cell Biology, The Ohio State University, Columbus, OH, USA
| | - Summer Gallentine
- Department of Biomedical Engineering, The Ohio State University, Columbus, OH, USA
| | - Jordan T. Moore
- Department of Biomedical Engineering, The Ohio State University, Columbus, OH, USA
| | | | - Natalia C. Mendonca
- Department of Biomedical Engineering, The Ohio State University, Columbus, OH, USA
| | - Jared B. Albert
- Department of Biomedical Engineering, The Ohio State University, Columbus, OH, USA
| | - Robert Houser
- Cosmetic & Plastic Surgery of Columbus, Columbus, OH, USA
| | | | - Heather Powell
- Department of Biomedical Engineering, The Ohio State University, Columbus, OH, USA
- Shriners Hospitals-Ohio, Dayton, OH, USA
| | | | - Kristin I. Stanford
- Department of Physiology and Cell Biology, The Ohio State University, Columbus, OH, USA
| | - Daniel Gallego-Perez
- Department of Biomedical Engineering, The Ohio State University, Columbus, OH, USA
- Department of Surgery, The Ohio State University, Columbus, OH, USA
- Biomedical Sciences Graduate Program, The Ohio State University College of Medicine, Columbus, OH, USA
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Chansoria P, Etter EL, Nguyen J. Regenerating dynamic organs using biomimetic patches. Trends Biotechnol 2022; 40:338-353. [PMID: 34412924 PMCID: PMC8831394 DOI: 10.1016/j.tibtech.2021.07.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2021] [Revised: 06/29/2021] [Accepted: 07/06/2021] [Indexed: 12/14/2022]
Abstract
The regeneration of dynamic organs remains challenging because they are intrinsically anisotropic and undergo large volumetric deformation during normal or pathological function. This hampers the durability and applicability of regenerative medicine approaches. To address the challenges of organ dynamics, a new class of patches have emerged with anisotropic and auxetic properties that mimic native tissue biomechanics and accommodate volumetric deformation. Here, we outline the critical design, materials, and processing considerations for achieving optimal patch biomechanics according to target pathology and summarize recent advances in biomimetic patches for dynamic organ regeneration. Furthermore, we discuss the challenges and opportunities which, if overcome, would open up new applications in organ regeneration and expedite the clinical translation of patch-based therapeutics.
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Affiliation(s)
| | | | - Juliane Nguyen
- Division of Pharmacoengineering and Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.
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3
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Park J, Kim SE, Cho Y, An S, Moon D, Park I, Doh J. Fabrication of 2D and 3D Cell Cluster Arrays Using a Cell-Friendly Photoresist. ACS Biomater Sci Eng 2021; 7:3082-3087. [PMID: 34125522 DOI: 10.1021/acsbiomaterials.1c00655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Cells in 3D behave differently than cells in 2D. We develop a new method for the fabrication of 2D and 3D cell cluster arrays on an identical substrate using a cell-friendly photoresist, which enables comparative study between cells in 2D and 3D cell clusters. The fabricated cell cluster arrays maintain their structure up to 3 days with good viability. Using this method, 2D and 3D cancer cell clusters with comparable sizes are fabricated, and natural killer (NK) cell cytotoxicity assays are performed to assess how dimensionality of cancer cell clusters influence their susceptibility to immune cell-mediated killing.
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Affiliation(s)
- Jeehun Park
- Research Institute of Advanced Materials (RIAM), Seoul National University, 1, Gwanak-ro, Seoul 08826, South Korea
| | - Seong-Eun Kim
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), 77, Cheongam-ro, Pohang, Gyeongbuk 37673, South Korea
| | - Yongbum Cho
- School of Interdisciplinary Bioscience and Bioengineering (I-Bio), Pohang University of Science and Technology (POSTECH), 77, Cheongam-ro, Pohang, Gyeongbuk 37673, South Korea
| | - Seongmin An
- Research Institute of Advanced Materials (RIAM), Seoul National University, 1, Gwanak-ro, Seoul 08826, South Korea
| | - Dowon Moon
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), 77, Cheongam-ro, Pohang, Gyeongbuk 37673, South Korea
| | - Inae Park
- Research Institute of Advanced Materials (RIAM), Seoul National University, 1, Gwanak-ro, Seoul 08826, South Korea
| | - Junsang Doh
- Research Institute of Advanced Materials (RIAM), Seoul National University, 1, Gwanak-ro, Seoul 08826, South Korea.,Department of Materials Science and Engineering, Institute of Engineering Research, BioMAX, Seoul National University, 1, Gwanak-ro, Seoul 08826, South Korea
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Cui J, Wang HP, Shi Q, Sun T. Pulsed Microfluid Force-Based On-Chip Modular Fabrication for Liver Lobule-Like 3D Cellular Models. CYBORG AND BIONIC SYSTEMS 2021; 2021:9871396. [PMID: 36285127 PMCID: PMC9494728 DOI: 10.34133/2021/9871396] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Accepted: 01/09/2021] [Indexed: 12/31/2022] Open
Abstract
In vitro three-dimensional (3D) cellular models with native tissue-like architectures and functions have potential as alternatives to human tissues in regenerative medicine and drug discovery. However, it is difficult to replicate liver constructs that mimic in vivo microenvironments using current approaches in tissue engineering because of the vessel-embedded 3D structure and complex cell distribution of the liver. This paper reports a pulsed microflow-based on-chip 3D assembly method to construct 3D liver lobule-like models that replicate the spatial structure and functions of the liver lobule. The heterogeneous cell-laden assembly units with hierarchical cell distribution are fabricated through multistep photopatterning of different cell-laden hydrogels. Through fluid force interaction by pulsed microflow, the hierarchical assembly units are driven to a stack, layer by layer, and thus spatially assemble into 3D cellular models in the closed liquid chamber of the assembly chip. The 3D models with liver lobule-like hexagonal morphology and radial cell distribution allow the dynamic perfusion culture to maintain high cell viability and functional expression during long-term culture in vitro. These results demonstrate that the fabricated 3D liver lobule-like models are promising for drug testing and the study of individual diagnoses and treatments.
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Affiliation(s)
- J. Cui
- Science and Technology on Electronic Test and Measurement Laboratory, North University of China, Taiyuan 030051, China
- Intelligent Robotics Institute, School of Mechatronical Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - H. P. Wang
- Intelligent Robotics Institute, School of Mechatronical Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Q. Shi
- Beijing Advanced Innovation Center for Intelligent Robots and Systems, Beijing Institute of Technology, Beijing 100081, China
| | - T. Sun
- Key Laboratory of Biomimetic Robots and Systems (Beijing Institute of Technology), Ministry of Education, Beijing 100081, China
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5
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Sasikumar S, Chameettachal S, Kingshott P, Cromer B, Pati F. 3D hepatic mimics - the need for a multicentric approach. ACTA ACUST UNITED AC 2020; 15:052002. [PMID: 32460259 DOI: 10.1088/1748-605x/ab971c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The liver is a center of metabolic activity, including the metabolism of drugs, and consequently is prone to drug-induced liver injury. Failure to detect hepatotoxicity of drugs during their development will lead to the withdrawal of the drugs during clinical trials. To avoid such clinical and economic consequences, in vitro liver models that can precisely predict the toxicity of a drug during the pre-clinical phase is necessary. This review describes the different technologies that are used to develop in vitro liver models and the different approaches aimed at mimicking different functional aspects of the liver at the fundamental level. This involves mimicking of the functional and structural units like the sinusoid, the bile canalicular system, and the acinus.
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Affiliation(s)
- Shyama Sasikumar
- Department of Biomedical Engineering, Indian Institute of Technology Hyderabad, Sangareddy 502285, Telangana, India. Department of Chemistry and Biotechnology, School of Science, Swinburne University of Technology, Hawthorn, Victoria 3122, Australia
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Early Intervention in Ischemic Tissue with Oxygen Nanocarriers Enables Successful Implementation of Restorative Cell Therapies. Cell Mol Bioeng 2020; 13:435-446. [PMID: 33184576 DOI: 10.1007/s12195-020-00621-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Accepted: 05/20/2020] [Indexed: 01/01/2023] Open
Abstract
Background Tissue ischemia contributes to necrosis and infection. While angiogenic cell therapies have emerged as a promising strategy against ischemia, current approaches to cell therapies face multiple hurdles. Recent advances in nuclear reprogramming could potentially overcome some of these limitations. However, under severely ischemic conditions necrosis could outpace reprogramming-based repair. As such, adjunctive measures are required to maintain a minimum level of tissue viability/activity for optimal response to restorative interventions. Methods Here we explored the combined use of polymerized hemoglobin (PolyHb)-based oxygen nanocarriers with Tissue Nano-Transfection (TNT)-driven restoration to develop tissue preservation/repair strategies that could potentially be used as a first line of care. Random-pattern cutaneous flaps were created in a mouse model of ischemic injury. PolyHbs with high and low oxygen affinity were synthesized and injected into the tissue flap at various timepoints of ischemic injury. The degree of tissue preservation was evaluated in terms of perfusion, oxygenation, and resulting necrosis. TNT was then used to deploy reprogramming-based vasculogenic cell therapies to the flaps via nanochannels. Reprogramming/repair outcomes were evaluated in terms of vascularity and necrosis. Results Flaps treated with PolyHbs exhibited a gradual decrease in necrosis as a function of time-to-intervention, with low oxygen affinity PolyHb showing the best outcomes. TNT-based intervention of the flap in combination with PolyHb successfully curtailed advanced necrosis compared to flaps treated with only PolyHb or TNT alone. Conclusions These results indicate that PolyHb and TNT technologies could potentially be synergistically deployed and used as early intervention measures to combat severe tissue ischemia.
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Anitha R, Vaikkath D, Shenoy SJ, Nair PD. Tissue-engineered islet-like cell clusters generated from adipose tissue-derived stem cells on three-dimensional electrospun scaffolds can reverse diabetes in an experimental rat model and the role of porosity of scaffolds on cluster differentiation. J Biomed Mater Res A 2019; 108:749-759. [PMID: 31788956 DOI: 10.1002/jbm.a.36854] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Accepted: 11/29/2019] [Indexed: 12/11/2022]
Abstract
In the current study, three-dimensional (3D) nanofibrous scaffolds with pore sizes in the range of 24-250 μm and 24-190 μm were fabricated via a two-step electrospinning method to overcome the limitation of obtaining three-dimensionality with large pore sizes for islet culture using conventional electrospinning. The scaffolds supported the growth and differentiation of adipose-derived mesenchymal stem cells to islet-like clusters (ILCs). The pore size of the scaffolds was found to influence the cluster size, viability and insulin release of the differentiated islets. Hence, islet clusters of the desired size could be developed for transplantation to overcome the loss of bigger islets due to hypoxia which adversely impacts the outcome of transplantation. The tissue-engineered constructs with ILC diameter of 50 μm reduced glycemic value within 3-4 weeks after implantation in the omental pouch of diabetic rats. Detection of insulin in the serum of implanted rats demonstrates that the tissue-engineered construct is efficient to control hyperglycemia. Our findings prove that the 3D architecture and pore size of scaffolds regulates the morphology and size of islets during differentiation which is critical in the survival and function of ILCs in vitro and in vivo.
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Affiliation(s)
- Rakhi Anitha
- Division of Tissue Engineering and Regeneration Technologies, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Kerala, India
| | - Dhanesh Vaikkath
- Division of Tissue Engineering and Regeneration Technologies, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Kerala, India
| | - Sachin J Shenoy
- Division of Tissue Engineering and Regeneration Technologies, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Kerala, India
| | - Prabha D Nair
- Division of Tissue Engineering and Regeneration Technologies, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Kerala, India
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9
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Nakao M, Imashiro C, Kuribara T, Kurashina Y, Totani K, Takemura K. Formation of Large Scaffold-Free 3-D Aggregates in a Cell Culture Dish by Ultrasound Standing Wave Trapping. ULTRASOUND IN MEDICINE & BIOLOGY 2019; 45:1306-1315. [PMID: 30799124 DOI: 10.1016/j.ultrasmedbio.2019.01.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2018] [Revised: 12/25/2018] [Accepted: 01/15/2019] [Indexed: 05/06/2023]
Abstract
Cellular aggregates that mimic cell-cell interactions in vitro are essential for biological research. This study introduces a method to form large scaffold-free 3-D aggregates in a clinically ubiquitous cell culture dish using kilohertz-order ultrasound standing wave trapping (USWT). We fabricated an aggregate formation system in which a 60-mm dish was set above a Langevin transducer via water. The transducer was excited at 110.8 kHz, and then C2C12 myoblasts were injected into the dish and trapped at the node position of the standing wave. The diameter and thickness of the formed aggregate were 8 and 2.7 mm, respectively, which are larger than those of aggregates formed previously by USWT. Moreover, we confirmed that >94% of cells constituting the aggregates survived 9 h, and the protein expression of cells was not altered significantly. This method can be applied to form aggregates with high functionality, which contributes to the development of biological research methodology.
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Affiliation(s)
- Misa Nakao
- School of Science for Open and Environmental Systems, Graduate School of Science and Technology, Keio University, Yokohama, Kanagawa, Japan
| | - Chikahiro Imashiro
- School of Science for Open and Environmental Systems, Graduate School of Science and Technology, Keio University, Yokohama, Kanagawa, Japan
| | - Taiki Kuribara
- Department of Materials and Life Science, Faculty of Science and Technology, Seikei University, Musashino, Tokyo, Japan
| | - Yuta Kurashina
- Department of Materials Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, Yokohama, Kanagawa, Japan 226-8503; Department of Mechanical Engineering, Faculty of Science and Technology, Keio University, Yokohama, Kanagawa, Japan
| | - Kiichiro Totani
- Department of Materials and Life Science, Faculty of Science and Technology, Seikei University, Musashino, Tokyo, Japan
| | - Kenjiro Takemura
- Department of Mechanical Engineering, Faculty of Science and Technology, Keio University, Yokohama, Kanagawa, Japan.
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10
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Cui J, Wang H, Zheng Z, Shi Q, Sun T, Huang Q, Fukuda T. Fabrication of perfusable 3D hepatic lobule-like constructs through assembly of multiple cell type laden hydrogel microstructures. Biofabrication 2018; 11:015016. [DOI: 10.1088/1758-5090/aaf3c9] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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11
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Shin HS, Lee S, Hong HJ, Lim YC, Koh WG, Lim JY. Stem cell properties of human clonal salivary gland stem cells are enhanced by three-dimensional priming culture in nanofibrous microwells. Stem Cell Res Ther 2018; 9:74. [PMID: 29566770 PMCID: PMC5863805 DOI: 10.1186/s13287-018-0829-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Revised: 03/05/2018] [Accepted: 03/07/2018] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND Three-dimensional (3D) cultures recapitulate the microenvironment of tissue-resident stem cells and enable them to modulate their properties. We determined whether salivary gland-resident stem cells (SGSCs) are primed by a 3D spheroid culture prior to treating irradiation-induced salivary hypofunction using in-vitro coculture and in-vivo transplant models. METHODS 3D spheroid-derived SGSCs (SGSCs3D) were obtained from 3D culture in microwells consisting of a nanofiber bottom and cell-repellent hydrogel walls, and were examined for salivary stem or epithelial gene/protein expression, differentiation potential, and paracrine secretory function compared with monolayer-cultured SGSCs (SGSCs2D) in vitro and in vivo. RESULTS SGSCs3D expressed increased salivary stem cell markers (LGR5 and THY1) and pluripotency markers (POU5F1 and NANOG) compared with SGSCs2D. Also, SGSCs3D exhibited enhanced potential to differentiate into salivary epithelial cells upon differentiation induction and increased paracrine secretion as compared to SGSCs2D. Wnt signaling was activated by 3D spheroid formation in the microwells and suppression of the Wnt/β-catenin pathway led to reduced stemness of SGSCs3D. Enhanced radioprotective properties of SGSCs3D against radiation-induced salivary hypofunction was confirmed by an organotypic 3D coculture and in-vivo transplantation experiments. CONCLUSION The 3D spheroid culture of SGSCs in nanofibrous microwells promotes stem cell properties via activation of Wnt signaling. This may contribute to SGSC priming prior to regenerative therapy to restore salivary hypofunction after radiotherapy.
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Affiliation(s)
- Hyun-Soo Shin
- Department of Otorhinolaryngology, Gangnam Severance Hospital, Yonsei University College of Medicine, 211 Eonju-ro, Gangnam-gu, Seoul, 06273, Republic of Korea
| | - Songyi Lee
- Department of Otorhinolaryngology, Gangnam Severance Hospital, Yonsei University College of Medicine, 211 Eonju-ro, Gangnam-gu, Seoul, 06273, Republic of Korea
| | - Hye Jin Hong
- Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul, Republic of Korea
| | - Young Chang Lim
- Department of Otorhinolaryngology, Head and Neck Surgery, Konkuk University School of Medicine, Seoul, Republic of Korea
| | - Won-Gun Koh
- Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul, Republic of Korea
| | - Jae-Yol Lim
- Department of Otorhinolaryngology, Gangnam Severance Hospital, Yonsei University College of Medicine, 211 Eonju-ro, Gangnam-gu, Seoul, 06273, Republic of Korea.
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Lei J, Murphy WL, Temenoff JS. Combination of Heparin Binding Peptide and Heparin Cell Surface Coatings for Mesenchymal Stem Cell Spheroid Assembly. Bioconjug Chem 2018; 29:878-884. [PMID: 29341600 DOI: 10.1021/acs.bioconjchem.7b00757] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Microtissues containing multiple cell types have been used in both in vitro models and in vivo tissue repair applications. However, to improve throughput, there is a need to develop a platform that supports self-assembly of a large number of 3D microtissues containing multiple cell types in a dynamic suspension system. Thus, the objective of this study was to exploit the binding interaction between the negatively charged glycosaminoglycan, heparin, and a known heparin binding peptide to establish a method that promotes assembly of mesenchymal stem cell (MSC) spheroids into larger aggregates. We characterized heparin binding peptide (HEPpep) and heparin coatings on cell surfaces and determined the specificity of these coatings in promoting assembly of MSC spheroids in dynamic culture. Overall, combining spheroids with both coatings promoted up to 70 ± 11% of spheroids to assemble into multiaggregate structures, as compared to only 10 ± 4% assembly when cells having the heparin coating were cultured with cells coated with a scrambled peptide. These results suggest that this self-assembly method represents an exciting approach that may be applicable for a wide range of applications in which cell aggregation is desired.
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Affiliation(s)
| | - William L Murphy
- Department of Biomedical Engineering , University of Wisconsin-Madison , Madison , Wisconsin 53706 , United States.,Department of Orthopedics and Rehabilitation , University of Wisconsin-Madison , Madison , Wisconsin 53705 , United States
| | - Johnna S Temenoff
- Coulter Department of Biomedical Engineering , Georgia Tech/Emory University , Atlanta , Georgia 30332 , United States
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Shin HS, Kook YM, Hong HJ, Kim YM, Koh WG, Lim JY. Functional spheroid organization of human salivary gland cells cultured on hydrogel-micropatterned nanofibrous microwells. Acta Biomater 2016; 45:121-132. [PMID: 27592814 DOI: 10.1016/j.actbio.2016.08.058] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Revised: 08/19/2016] [Accepted: 08/31/2016] [Indexed: 01/07/2023]
Abstract
Development of a tissue-engineered, salivary bio-gland will benefit patients suffering from xerostomia due to loss of fluid-secreting acinar cells. This study was conducted to develop a bioengineering system to induce self-assembly of human parotid epithelial cells (hPECs) cultured on poly ethylene glycol (PEG) hydrogel-micropatterned polycaprolactone (PCL) nanofibrous microwells. Microwells were fabricated by photopatterning of PEG hydrogel in the presence of an electrospun PCL nanofibrous scaffold. hPECs were plated on plastic dishes, Matrigel, PCL nanofibers, or PCL nanofibrous microwells. When the cells were plated onto plastic, they did not form spheres, but aggregated to form 3D acinar-like spheroids when cultured on Matrigel, PCL, and PCL microwells, with the greatest aggregating potency being observed on the PCL microwells. The 3D-assembled spheroids in the PCL microwells expressed higher levels of salivary epithelial markers (α-amylase and AQP5), tight junction proteins (ZO-1 and occludin), adherence protein (E-cadherin), and cytoskeletal protein (F-actin) than those on the Matrigel and PCL. Furthermore, the 3D-assembled spheroids in the PCL microwells showed higher levels of α-amylase secretion and intracellular calcium concentration ([Ca2+]i) than those on the Matrigel and PCL nanofibers, suggesting more functional organization of hPECs. We established a bioengineering 3D culture system to promote robust and functional acinar-like organoids from hPECs. PCL nanofibrous microwells can be applied in the future for bioengineering of an artificial bio-salivary gland for restoration of salivary function. STATEMENT OF SIGNIFICANCE Three dimensional (3D) cultures of salivary glandular epithelial cells using nanofibrous bottom facilitate the formation of acinar-like organoids. In this study, we adapted a PEG hydrogel-micropatterned PCL nanofibrous microwell for the efficient bioengineering of human salivary gland organoids, in which we could easily produce uniform size of 3D organoids. This 3D culture system supports spherical organization, gene and protein expression of acinar markers, TJ proteins, adherence, and cytoskeletal proteins, as well as to promote epithelial structural integrity and acinar secretory functions, and results showed superior efficiency relative to Matrigel and nanofibrous scaffold culture. This 3D culture system has benefits in terms of inert, non-animal and serum-free culture conditions, as well as controllable spheroid size and scalable production of functional SG organoids and is applicable to bioengineering approaches for an artificial bio-gland, as well as to investigations of salivary gland physiology and regeneration.
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Affiliation(s)
- Hyun-Soo Shin
- Department of Otorhinolaryngology-Head and Neck Surgery, Inha University College of Medicine, Incheon, Republic of Korea
| | - Yun-Min Kook
- Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul, Republic of Korea
| | - Hye Jin Hong
- Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul, Republic of Korea
| | - Young-Mo Kim
- Department of Otorhinolaryngology-Head and Neck Surgery, Inha University College of Medicine, Incheon, Republic of Korea
| | - Won-Gun Koh
- Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul, Republic of Korea.
| | - Jae-Yol Lim
- Department of Otorhinolaryngology-Head and Neck Surgery, Inha University College of Medicine, Incheon, Republic of Korea.
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Goldshmid R, Cohen S, Shachaf Y, Kupershmit I, Sarig-Nadir O, Seliktar D, Wechsler R. Steric Interference of Adhesion Supports In-Vitro Chondrogenesis of Mesenchymal Stem Cells on Hydrogels for Cartilage Repair. Sci Rep 2015; 5:12607. [PMID: 26411496 PMCID: PMC4585928 DOI: 10.1038/srep12607] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2014] [Accepted: 06/11/2015] [Indexed: 02/02/2023] Open
Abstract
Recent studies suggest the presence of cell adhesion motifs found in structural proteins can inhibit chondrogenesis. In this context, the current study aims to determine if a polyethylene glycol (PEG)-modified fibrinogen matrix could support better chondrogenesis of human bone marrow mesenchymal stem cells (BM-MSC) based on steric interference of adhesion, when compared to a natural fibrin matrix. Hydrogels used as substrates for two-dimensional (2D) BM-MSC cultures under chondrogenic conditions were made from cross-linked PEG-fibrinogen (PF) and compared to thrombin-activated fibrin. Cell morphology, protein expression, DNA and sulfated proteoglycan (GAG) content were correlated to substrate properties such as stiffness and adhesiveness. Cell aggregation and chondrogenic markers, including collagen II and aggrecan, were observed on all PF substrates but not on fibrin. Shielding fibrinogen's adhesion domains and increasing stiffness of the material are likely contributing factors that cause the BM-MSCs to display a more chondrogenic phenotype. One composition of PF corresponding to GelrinC™--a product cleared in the EU for cartilage repair--was found to be optimal for supporting chondrogenic differentiation of BM-MSC while minimizing hypertrophy (collagen X). These findings suggest that semi-synthetic biomaterials based on ECM proteins can be designed to favourably affect BM-MSC towards repair processes involving chondrogenesis.
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Affiliation(s)
- Revital Goldshmid
- The Faculty of Biomedical Engineering, Technion-Israel Institute of Technology, Haifa 32000, Israel
| | | | | | | | | | - Dror Seliktar
- The Faculty of Biomedical Engineering, Technion-Israel Institute of Technology, Haifa 32000, Israel
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15
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Geiger BC, Nelson MT, Munj HR, Tomasko DL, Lannutti JJ. Dual drug release from CO2-infused nanofibers via hydrophobic and hydrophilic interactions. J Appl Polym Sci 2015. [DOI: 10.1002/app.42571] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Brett C. Geiger
- Department of Biomedical Engineering; The Ohio State University; Columbus Ohio 43210
| | - Mark Tyler Nelson
- Department of Biomedical Engineering; The Ohio State University; Columbus Ohio 43210
| | - Hrishikesh R. Munj
- William G. Lowrie Department of Chemical and Biomolecular Engineering; The Ohio State University; Columbus Ohio 43210
| | - David L. Tomasko
- William G. Lowrie Department of Chemical and Biomolecular Engineering; The Ohio State University; Columbus Ohio 43210
| | - John J. Lannutti
- Department of Materials Science and Engineering; The Ohio State University; Columbus Ohio 43210
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16
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Nedjari S, Hébraud A, Eap S, Siegwald S, Mélart C, Benkirane-Jessel N, Schlatter G. Electrostatic template-assisted deposition of microparticles on electrospun nanofibers: towards microstructured functional biochips for screening applications. RSC Adv 2015. [DOI: 10.1039/c5ra15931h] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Electrostatic Template-Assisted Deposition (ETAD) of microparticles is described as a new process to control the deposition of microparticles by electrospraying onto a substrate.
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Affiliation(s)
- S. Nedjari
- ICPEES Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé, UMR 7515
- CNRS, Université de Strasbourg
- 67089 Strasbourg Cedex
- France
| | - A. Hébraud
- ICPEES Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé, UMR 7515
- CNRS, Université de Strasbourg
- 67089 Strasbourg Cedex
- France
| | - S. Eap
- INSERM Unité 1109
- Université de Strasbourg
- F-67085 Strasbourg Cedex
- France
| | - S. Siegwald
- ICPEES Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé, UMR 7515
- CNRS, Université de Strasbourg
- 67089 Strasbourg Cedex
- France
| | - C. Mélart
- ICPEES Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé, UMR 7515
- CNRS, Université de Strasbourg
- 67089 Strasbourg Cedex
- France
| | | | - G. Schlatter
- ICPEES Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé, UMR 7515
- CNRS, Université de Strasbourg
- 67089 Strasbourg Cedex
- France
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17
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Shen C, Meng Q, He W, Wang Q, Zhang G. PPO/PEO modified hollow fiber membranes improved sensitivity of 3D cultured hepatocytes to drug toxicity via suppressing drug adsorption on membranes. Colloids Surf B Biointerfaces 2014; 123:762-9. [PMID: 25454662 DOI: 10.1016/j.colsurfb.2014.10.023] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2014] [Revised: 09/22/2014] [Accepted: 10/09/2014] [Indexed: 11/16/2022]
Abstract
The three dimensional (3D) cell culture in polymer-based micro system has become a useful tool for in vitro drug discovery. Among those polymers, polysulfone hollow fiber membrane (PSf HFM) is commonly used to create a microenvironment for cells. However, the target drug may adsorb on the polymeric surface, and this elicits negative impacts on cell exposure due to the reduced effective drug concentration in culture medium. In order to reduce the drug adsorption, PSf membrane were modified with hydrophilic Pluronic (PEO-b-PPO-b-PEO) copolymers, L121, P123 and F127 (PEO contents increase from 10%, 30% to 70%), by physical adsorption. As a result, the hydrophilicity of HFMs increased at an order of PSf<L121<P123<F127 HFMs, while the negative surface charge decreased at the order of PSf>F127>P123>L121 HFMs. The three modified membrane all showed significant resistance to adsorption of acid/neutral drugs. More importantly, the adsorption of base drugs were largely reduced to an average value of 11% on the L121 HFM. The improved resistance to drug adsorption could be attributed to the synergy of hydrophobic/neutrally charged PPO and hydrophilic PEO. The L121 HFM was further assessed by evaluating the drug hepatotoxicity in 3D culture of hepatocytes. The base drugs, clozapine and doxorubicin, showed more sensitive hepatotoxicity on hepatocytes in L121 HFM than in PSf HFM, while the acid drug, salicylic acid, showed the similar hepatotoxicity to hepatocytes in both HFMs. Our finding suggests that PSf HFM modified by PEO-b-PPO-b-PEO copolymers can efficiently resist the drug adsorption onto polymer membrane, and consequently improve the accuracy and sensitivity of in vitro hepatotoxic drug screening.
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Affiliation(s)
- Chong Shen
- Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou, China
| | - Qin Meng
- Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou, China.
| | - Wenjuan He
- Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou, China
| | - Qichen Wang
- Micro Stamping Corporation, Somerset, NJ 08873, United States
| | - Guoliang Zhang
- College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou, China.
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18
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Wang MS, Luo Z, Cherukuri S, Nitin N. Facile generation of cell microarrays using vacuum degassing and coverslip sweeping. Anal Biochem 2014; 457:48-50. [PMID: 24785006 DOI: 10.1016/j.ab.2014.04.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2014] [Revised: 04/11/2014] [Accepted: 04/18/2014] [Indexed: 01/09/2023]
Abstract
A simple method to generate cell microarrays with high-percentage well occupancy and well-defined cell confinement is presented. This method uses a synergistic combination of vacuum degassing and coverslip sweeping. The vacuum degassing step dislodges air bubbles from the microwells, which in turn enables the cells to enter the microwells, while the physical sweeping step using a glass coverslip removes the excess cells outside the microwells. This low-cost preparation method provides a simple solution to generating cell microarrays that can be performed in basic research laboratories and point-of-care settings for routine cell-based screening assays.
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Affiliation(s)
- Min S Wang
- Food Science and Technology Department, University of California at Davis, Davis, CA 95616, USA
| | - Zhen Luo
- Department of Biological and Agricultural Engineering, University of California at Davis, Davis, CA 95616, USA
| | - Sundar Cherukuri
- Department of Biological and Agricultural Engineering, University of California at Davis, Davis, CA 95616, USA
| | - Nitin Nitin
- Food Science and Technology Department, University of California at Davis, Davis, CA 95616, USA; Department of Biological and Agricultural Engineering, University of California at Davis, Davis, CA 95616, USA.
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19
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Blackstone BN, Palmer AF, Rilo HR, Powell HM. Scaffold architecture controls insulinoma clustering, viability, and insulin production. Tissue Eng Part A 2014; 20:1784-93. [PMID: 24410263 DOI: 10.1089/ten.tea.2013.0107] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Recently, in vitro diagnostic tools have shifted focus toward personalized medicine by incorporating patient cells into traditional test beds. These cell-based platforms commonly utilize two-dimensional substrates that lack the ability to support three-dimensional cell structures seen in vivo. As monolayer cell cultures have previously been shown to function differently than cells in vivo, the results of such in vitro tests may not accurately reflect cell response in vivo. It is therefore of interest to determine the relationships between substrate architecture, cell structure, and cell function in 3D cell-based platforms. To investigate the effect of substrate architecture on insulinoma organization and function, insulinomas were seeded onto 2D gelatin substrates and 3D fibrous gelatin scaffolds with three distinct fiber diameters and fiber densities. Cell viability and clustering was assessed at culture days 3, 5, and 7 with baseline insulin secretion and glucose-stimulated insulin production measured at day 7. Small, closely spaced gelatin fibers promoted the formation of large, rounded insulinoma clusters, whereas monolayer organization and large fibers prevented cell clustering and reduced glucose-stimulated insulin production. Taken together, these data show that scaffold properties can be used to control the organization and function of insulin-producing cells and may be useful as a 3D test bed for diabetes drug development.
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Affiliation(s)
- Britani N Blackstone
- 1 Department of Biomedical Engineering, The Ohio State University , Columbus, Ohio
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20
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Kinney MA, Hookway TA, Wang Y, McDevitt TC. Engineering three-dimensional stem cell morphogenesis for the development of tissue models and scalable regenerative therapeutics. Ann Biomed Eng 2014; 42:352-67. [PMID: 24297495 PMCID: PMC3939035 DOI: 10.1007/s10439-013-0953-9] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2013] [Accepted: 11/21/2013] [Indexed: 12/11/2022]
Abstract
The physiochemical stem cell microenvironment regulates the delicate balance between self-renewal and differentiation. The three-dimensional assembly of stem cells facilitates cellular interactions that promote morphogenesis, analogous to the multicellular, heterotypic tissue organization that accompanies embryogenesis. Therefore, expansion and differentiation of stem cells as multicellular aggregates provides a controlled platform for studying the biological and engineering principles underlying spatiotemporal morphogenesis and tissue patterning. Moreover, three-dimensional stem cell cultures are amenable to translational screening applications and therapies, which underscores the broad utility of scalable suspension cultures across laboratory and clinical scales. In this review, we discuss stem cell morphogenesis in the context of fundamental biophysical principles, including the three-dimensional modulation of adhesions, mechanics, and molecular transport and highlight the opportunities to employ stem cell spheroids for tissue modeling, bioprocessing, and regenerative therapies.
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Affiliation(s)
- Melissa A. Kinney
- The Wallace H. Coulter Department of Biomedical Engineering Georgia Institute of Technology/Emory University, Atlanta, GA, USA
| | - Tracy A. Hookway
- The Wallace H. Coulter Department of Biomedical Engineering Georgia Institute of Technology/Emory University, Atlanta, GA, USA
| | - Yun Wang
- The Wallace H. Coulter Department of Biomedical Engineering Georgia Institute of Technology/Emory University, Atlanta, GA, USA
| | - Todd C. McDevitt
- The Wallace H. Coulter Department of Biomedical Engineering Georgia Institute of Technology/Emory University, Atlanta, GA, USA
- The Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, USA
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21
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22
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Kamei KI. Cutting-Edge Microfabricated Biomedical Tools for Human Pluripotent Stem Cell Research. ACTA ACUST UNITED AC 2013; 18:469-81. [DOI: 10.1177/2211068213495394] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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23
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Jeon O, Alsberg E. Regulation of Stem Cell Fate in a Three-Dimensional Micropatterned Dual-Crosslinked Hydrogel System. ADVANCED FUNCTIONAL MATERIALS 2013; 23:4765-4775. [PMID: 24578678 PMCID: PMC3933204 DOI: 10.1002/adfm.201300529] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Micropatterning technology is a powerful tool for controlling the cellular microenvironment and investigating the effects of physical parameters on cell behaviors, such as migration, proliferation, apoptosis, and differentiation. Although there have been significant developments in regulating the spatial and temporal distribution of physical properties in various materials, little is known about the role of the size of micropatterned regions of hydrogels with different crosslinking densities on the response of encapsulated cells. In this study, novel alginate hydrogel system is engineered that can be micropatterned three-dimensionally to create regions that are crosslinked by a single mechanism or dual mechanisms. By manipulating micropattern size while keeping the overall ratio of single- to dual-crosslinked hydrogel volume constant, the physical properties of the micropatterned alginate hydrogels are spatially tunable. When human adipose-derived stem cells (hASCs) are photoencapsulated within micropatterned hydrogels, their proliferation rate is a function of micropattern size. Additionally, micropattern size dictates the extent of osteogenic and chondrogenic differentiation of photoencapsulated hASC. The size of 3D micropatterned physical properties in this new hydrogel system introduces a new design parameter for regulating various cellular behaviors, and this dual-crosslinked hydrogel system provides a new platform for studying proliferation and differentiation of stem cells in a spatially controlled manner for tissue engineering and regenerative medicine applications.
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Affiliation(s)
- Oju Jeon
- Department of Biomedical Engineering, Case Western Reserve University, 10900 Euclid Ave., Cleveland, OH 44106, USA
| | - Eben Alsberg
- Department of Biomedical Engineering, Case Western Reserve University, 10900 Euclid Ave., Cleveland, OH 44106, USA. Department of Orthopaedic Surgery, Case Western Reserve University, 10900 Euclid Ave., Cleveland, OH 44106 (USA)
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24
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Soscia DA, Sequeira SJ, Schramm RA, Jayarathanam K, Cantara SI, Larsen M, Castracane J. Salivary gland cell differentiation and organization on micropatterned PLGA nanofiber craters. Biomaterials 2013; 34:6773-84. [PMID: 23777914 PMCID: PMC3755621 DOI: 10.1016/j.biomaterials.2013.05.061] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2013] [Accepted: 05/24/2013] [Indexed: 12/20/2022]
Abstract
There is a need for an artificial salivary gland as a long-term remedy for patients suffering from salivary hypofunction, a leading cause of chronic xerostomia (dry mouth). Current salivary gland tissue engineering approaches are limited in that they either lack sufficient physical cues and surface area needed to facilitate epithelial cell differentiation, or they fail to provide a mechanism for assembling an interconnected branched network of cells. We have developed highly-ordered arrays of curved hemispherical "craters" in polydimethylsiloxane (PDMS) using wafer-level integrated circuit (IC) fabrication processes, and lined them with electrospun poly-lactic-co-glycolic acid (PLGA) nanofibers, designed to mimic the three-dimensional (3-D) in vivo architecture of the basement membrane surrounding spherical acini of salivary gland epithelial cells. These micropatterned scaffolds provide a method for engineering increased surface area and were additionally investigated for their ability to promote cell polarization. Two immortalized salivary gland cell lines (SIMS, ductal and Par-C10, acinar) were cultured on fibrous crater arrays of various radii and compared with those grown on flat PLGA nanofiber substrates, and in 3-D Matrigel. It was found that by increasing crater curvature, the average height of the cell monolayer of SIMS cells and to a lesser extent, Par-C10 cells, increased to a maximum similar to that seen in cells grown in 3-D Matrigel. Increasing curvature resulted in higher expression levels of tight junction protein occludin in both cell lines, but did not induce a change in expression of adherens junction protein E-cadherin. Additionally, increasing curvature promoted polarity of both cell lines, as a greater apical localization of occludin was seen in cells on substrates of higher curvature. Lastly, substrate curvature increased expression of the water channel protein aquaporin-5 (Aqp-5) in Par-C10 cells, suggesting that curved nanofiber substrates are more suitable for promoting differentiation of salivary gland cells.
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Affiliation(s)
- David A. Soscia
- College of Nanoscale Science and Engineering, University at Albany, State University of New York, 257 Fuller Road, Albany, NY 12203, USA
| | - Sharon J. Sequeira
- Dept. of Biological Sciences, University at Albany, State University of New York, 1400 Washington Avenue, Life Sciences Bldg., Albany, NY 12222, USA
| | - Robert A. Schramm
- College of Nanoscale Science and Engineering, University at Albany, State University of New York, 257 Fuller Road, Albany, NY 12203, USA
| | - Kavitha Jayarathanam
- College of Nanoscale Science and Engineering, University at Albany, State University of New York, 257 Fuller Road, Albany, NY 12203, USA
| | - Shraddha I. Cantara
- Dept. of Biological Sciences, University at Albany, State University of New York, 1400 Washington Avenue, Life Sciences Bldg., Albany, NY 12222, USA
| | - Melinda Larsen
- Dept. of Biological Sciences, University at Albany, State University of New York, 1400 Washington Avenue, Life Sciences Bldg., Albany, NY 12222, USA
| | - James Castracane
- College of Nanoscale Science and Engineering, University at Albany, State University of New York, 257 Fuller Road, Albany, NY 12203, USA
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25
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Wang J, Chen H, Zhang P, Zhang Z, Zhang S, Kong J. Probing trace Hg2+ in a microfluidic chip coupled with in situ near-infrared fluorescence detection. Talanta 2013; 114:204-10. [DOI: 10.1016/j.talanta.2013.03.079] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2012] [Revised: 03/25/2013] [Accepted: 03/28/2013] [Indexed: 11/27/2022]
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26
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Shen C, Meng Q, Zhang G. Increased curvature of hollow fiber membranes could up-regulate differential functions of renal tubular cell layers. Biotechnol Bioeng 2013; 110:2173-83. [DOI: 10.1002/bit.24874] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2012] [Revised: 02/03/2013] [Accepted: 02/15/2013] [Indexed: 12/19/2022]
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27
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Jeon O, Alsberg E. Photofunctionalization of alginate hydrogels to promote adhesion and proliferation of human mesenchymal stem cells. Tissue Eng Part A 2013; 19:1424-32. [PMID: 23327676 DOI: 10.1089/ten.tea.2012.0581] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Photocrosslinkable biomaterials are promising for biomedical applications, as they can be injected in a minimally invasive manner, crosslinked in situ to form hydrogels with cells and/or bioactive factors, and engineered to provide instructive signals to transplanted and host cells. Our group has previously reported on biodegradable, photocrosslinkable alginate (ALG) hydrogels with controlled cell adhesivity for tissue engineering. The polymer backbone of this methacrylated ALG was covalently modified with cell adhesion ligands containing the RGD sequence to enhance the proliferation and differentiation response of encapsulated cells. However, this approach permits limited control over the spatial presentation of these ligands within the three-dimensional hydrogel structure. Here we present a system that easily allows for spatial control of cell adhesion ligands within photocrosslinked ALG hydrogels. A cell adhesive peptide composed of the specific amino acid sequence Gly-Arg-Gly-Asp-Ser-Pro (GRGDSP) was covalently modified with acrylate moieties. The acrylated peptide was then covalently incorporated into bulk hydrogels by adding it to methacrylated ALG solutions with a photoinitiator, and then photocrosslinking under long-wave ultraviolet light. The hydrogels were characterized with respect to their swelling and degradation profiles, and the effects of the acrylated peptide on human mesenchymal stem cell (hMSC) viability, adhesion, spreading, and proliferation were examined in vitro. hMSC adhesion and spreading on and proliferation in this biomaterial system could be regulated by varying the concentration of cell adhesion ligand. This new biomaterial system may be a useful platform for tissue engineering, drug delivery, and stem cell transplantation with spatial control of cell adhesivity.
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Affiliation(s)
- Oju Jeon
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, Ohio 44106, USA
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28
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Fei Z, Wu Y, Sharma S, Gallego-Perez D, Higuita-Castro N, Hansford D, Lannutti JJ, Lee LJ. Gene Delivery to Cultured Embryonic Stem Cells Using Nanofiber-Based Sandwich Electroporation. Anal Chem 2013; 85:1401-7. [DOI: 10.1021/ac302140p] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zhengzheng Fei
- William G. Lowrie
Department
of Chemical and Biomolecular Engineering, The Ohio State University, 125A Koffolt Laboratories, 140 West 19th
Avenue, Columbus, Ohio 43210, United States
- NSF Nanoscale Science and Engineering
Center for Affordable Nanoengineering of Polymer Biomedical Devices, The Ohio State University, 174 W 18th Avenue, Room
1012, Columbus, Ohio 43210, United States
| | - Yun Wu
- NSF Nanoscale Science and Engineering
Center for Affordable Nanoengineering of Polymer Biomedical Devices, The Ohio State University, 174 W 18th Avenue, Room
1012, Columbus, Ohio 43210, United States
| | - Sadhana Sharma
- NSF Nanoscale Science and Engineering
Center for Affordable Nanoengineering of Polymer Biomedical Devices, The Ohio State University, 174 W 18th Avenue, Room
1012, Columbus, Ohio 43210, United States
| | - Daniel Gallego-Perez
- NSF Nanoscale Science and Engineering
Center for Affordable Nanoengineering of Polymer Biomedical Devices, The Ohio State University, 174 W 18th Avenue, Room
1012, Columbus, Ohio 43210, United States
| | - Natalia Higuita-Castro
- NSF Nanoscale Science and Engineering
Center for Affordable Nanoengineering of Polymer Biomedical Devices, The Ohio State University, 174 W 18th Avenue, Room
1012, Columbus, Ohio 43210, United States
- Department of Biomedical Engineering, The Ohio State University, 270 Bevis Hall, 1080 Carmack
Road, Columbus, Ohio 43210, United States
| | - Derek Hansford
- NSF Nanoscale Science and Engineering
Center for Affordable Nanoengineering of Polymer Biomedical Devices, The Ohio State University, 174 W 18th Avenue, Room
1012, Columbus, Ohio 43210, United States
- Department of Biomedical Engineering, The Ohio State University, 270 Bevis Hall, 1080 Carmack
Road, Columbus, Ohio 43210, United States
| | - John J. Lannutti
- NSF Nanoscale Science and Engineering
Center for Affordable Nanoengineering of Polymer Biomedical Devices, The Ohio State University, 174 W 18th Avenue, Room
1012, Columbus, Ohio 43210, United States
- Department of Materials Science
and Engineering, The Ohio State University, 477 W Hall, 2041 College Road, Columbus, Ohio 43210, United States
| | - Ly James Lee
- William G. Lowrie
Department
of Chemical and Biomolecular Engineering, The Ohio State University, 125A Koffolt Laboratories, 140 West 19th
Avenue, Columbus, Ohio 43210, United States
- NSF Nanoscale Science and Engineering
Center for Affordable Nanoengineering of Polymer Biomedical Devices, The Ohio State University, 174 W 18th Avenue, Room
1012, Columbus, Ohio 43210, United States
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29
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Fernekorn U, Hampl J, Augspurger C, Hildmann C, Weise F, Klett M, Läffert A, Gebinoga M, Williamson A, Schober A. In vitro cultivation of biopsy derived primary hepatocytes leads to a more metabolic genotype in perfused 3D scaffolds than static 3D cell culture. RSC Adv 2013. [DOI: 10.1039/c3ra42358a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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30
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Zorlutuna P, Vrana NE, Khademhosseini A. The expanding world of tissue engineering: the building blocks and new applications of tissue engineered constructs. IEEE Rev Biomed Eng 2012; 6:47-62. [PMID: 23268388 DOI: 10.1109/rbme.2012.2233468] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The field of tissue engineering has been growing in the recent years as more products have made it to the market and as new uses for the engineered tissues have emerged, motivating many researchers to engage in this multidisciplinary field of research. Engineered tissues are now not only considered as end products for regenerative medicine, but also have emerged as enabling technologies for other fields of research ranging from drug discovery to biorobotics. This widespread use necessitates a variety of methodologies for production of tissue engineered constructs. In this review, these methods together with their non-clinical applications will be described. First, we will focus on novel materials used in tissue engineering scaffolds; such as recombinant proteins and synthetic, self assembling polypeptides. The recent advances in the modular tissue engineering area will be discussed. Then scaffold-free production methods, based on either cell sheets or cell aggregates will be described. Cell sources used in tissue engineering and new methods that provide improved control over cell behavior such as pathway engineering and biomimetic microenvironments for directing cell differentiation will be discussed. Finally, we will summarize the emerging uses of engineered constructs such as model tissues for drug discovery, cancer research and biorobotics applications.
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Affiliation(s)
- Pinar Zorlutuna
- Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Cambridge, MA, USA.
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31
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Gallego-Perez D, Higuita-Castro N, Reen RK, Palacio-Ochoa M, Sharma S, Lee LJ, Lannutti JJ, Hansford DJ, Gooch KJ. Micro/nanoscale technologies for the development of hormone-expressing islet-like cell clusters. Biomed Microdevices 2012; 14:779-89. [PMID: 22573223 DOI: 10.1007/s10544-012-9657-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Insulin-expressing islet-like cell clusters derived from precursor cells have significant potential in the treatment of type-I diabetes. Given that cluster size and uniformity are known to influence islet cell behavior, the ability to effectively control these parameters could find applications in the development of anti-diabetic therapies. In this work, we combined micro and nanofabrication techniques to build a biodegradable platform capable of supporting the formation of islet-like structures from pancreatic precursors. Soft lithography and electrospinning were used to create arrays of microwells (150-500 μm diameter) structurally interfaced with a porous sheet of micro/nanoscale polyblend fibers (~0.5-10 μm in cross-sectional size), upon which human pancreatic ductal epithelial cells anchored and assembled into insulin-expressing 3D clusters. The microwells effectively regulated the spatial distribution of the cells on the platform, as well as cluster size, shape and homogeneity. Average cluster cross-sectional area (~14000-17500 μm(2)) varied in proportion to the microwell dimensions, and mean circularity values remained above 0.7 for all microwell sizes. In comparison, clustering on control surfaces (fibers without microwells or tissue culture plastic) resulted in irregularly shaped/sized cell aggregates. Immunoreactivity for insulin, C-peptide and glucagon was detected on both the platform and control surfaces; however, intracellular levels of C-peptide/cell were ~60 % higher on the platform.
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Affiliation(s)
- Daniel Gallego-Perez
- Department of Biomedical Engineering, The Ohio State University, Columbus, OH 43210, USA
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32
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Abstract
The fates of pluripotent stem cells (PSCs), including survival, self-renewal, and differentiation, are regulated by chemical and mechanical cues presented in the three-dimensional (3D) microenvironment. Most PSC studies have been performed on two-dimensional substrates. However, 3D culture systems have demonstrated the importance of intercellular interactions in regulating PSC self-renewal and differentiation. Microwell culture systems have been developed to generate homogenous PSC colonies of defined sizes and shapes and to study how colony morphology affects cell fate. Using microwells, researchers have demonstrated that PSCs remain in a self-renewing undifferentiated state as a result of autocrine and paracrine signaling. Other studies have shown that microwell regulation of embryoid body size affects lineage commitment during differentiation via cell-cell contact and expression of soluble signals. In this review, we discuss recent advances in the design and utilization of 3D microwell platforms for studying intercellular regulation of PSC cell fate decisions and the underlying molecular mechanisms.
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33
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Blackstone BN, Willard JJ, Lee CH, Nelson MT, Hart RT, Lannutti JJ, Powell HM. Plasma surface modification of electrospun fibers for adhesion-based cancer cell sorting. Integr Biol (Camb) 2012; 4:1112-21. [PMID: 22832548 DOI: 10.1039/c2ib20025b] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Personalized cancer therapies drive the need for devices that rapidly and accurately segregate cancer cells from solid tumors. One potential sorting strategy is to segregate populations of cells based on their relative strength of adhesion. To investigate the effect of surface hydrophilicity and cell phenotype on adhesion, primary human breast skin fibroblasts and keratinocytes and MCF-7 breast cancer cells were seeded onto air and CF(4) plasma-treated nanofibers followed by exposure to three shear stresses (200, 275 and 350 dynes per cm(2)) 1 hour after inoculation. No difference in strength of adhesion was measured in either fibroblasts or keratinocytes on either plasma treated-surface: all exhibited >60% of the initial cell count after a 5 minute exposure to 350 dynes per cm(2) of shear stress. In contrast, a significant difference between relative strength of adhesion on air versus CF(4) plasma-treated surfaces was observed for MCF-7 cells: 26% and 6.6% of cells remained on the air and CF(4) plasma-treated surfaces, respectively. The ability to sort this cancer cell line from two non-cancerous primary human cells was evaluated by inoculating a mixture of all three cell types simultaneously onto CF(4) treated nanofibers followed by 1 hour of culture and exposure to 350 dynes per cm(2) shear stress. The majority of MCF-7 cells were removed (0.7% remained) while a majority of fibroblasts and keratinocytes remained adhered (74 and 57%). Post-sorted MCF-7 viability and morphology remained unchanged, preserving the possibility of post-separation and analysis. These data suggest that the plasma treatment of electrospun scaffolds provides a tool useful in sorting cancer cells from a mixed cell population based on adhesion strength.
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Affiliation(s)
- B N Blackstone
- Department of Biomedical Engineering, The Ohio State University, Columbus, OH 43210, USA
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Medina-Sánchez M, Miserere S, Merkoçi A. Nanomaterials and lab-on-a-chip technologies. LAB ON A CHIP 2012; 12:1932-43. [PMID: 22517169 DOI: 10.1039/c2lc40063d] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Lab-on-a-chip (LOC) platforms have become important tools for sample analysis and treatment with interest for DNA, protein and cells studies or diagnostics due to benefits such as the reduced sample volume, low cost, portability and the possibility to build new analytical devices or be integrated into conventional ones. These platforms have advantages of a wide set of nanomaterials (NM) (i.e. nanoparticles, quantum dots, nanowires, graphene etc.) and offer excellent improvement in properties for many applications (i.e. detectors sensitivity enhancement, biolabelling capability along with other in-chip applications related to the specificities of the variety of nanomaterials with optical, electrical and/or mechanical properties). This review covers the last trends in the use of nanomaterials in microfluidic systems and the related advantages in analytical and bioanalytical applications. In addition to the applications of nanomaterials in LOCs, we also discuss the employment of such devices for the production and characterization of nanomaterials. Both framed platforms, NMs based LOCs and LOCs for NMs production and characterization, represent promising alternatives to generate new nanotechnology tools for point-of-care diagnostics, drug delivery and nanotoxicology applications.
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Affiliation(s)
- Mariana Medina-Sánchez
- Nanobioelectronics & Biosensors Group, Institut Català de Nanotecnologia, Campus UAB, Bellaterra, Barcelona-Spain
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Chen H, Li J, Zhang H, Li M, Rosengarten G, Nordon RE. Microwell perfusion array for high-throughput, long-term imaging of clonal growth. BIOMICROFLUIDICS 2011; 5:44117-4411713. [PMID: 22259644 PMCID: PMC3260560 DOI: 10.1063/1.3669371] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2011] [Accepted: 11/19/2011] [Indexed: 05/02/2023]
Abstract
Continuous cell tracking by time-lapse microscopy has led to detailed study of cell differentiation pathways using single cell fate maps. There are a multitude of cell fate outcomes, so hundreds of clonal division histories are required to measure these stochastic branching processes. This study examines the principle of condensing cell imaging information into a relatively small region to maximize live cell imaging throughput. High throughput clonal analysis of non-adherent cells by continuous live cell tracking was possible using a microwell perfusion array with an internal volume of 16 μl and 600 microwells at the base. This study includes examination of biocompatibility of buffer systems, connecting tubing, cell culture substrates, and media degradation. An intermittent perfusion protocol was selected for long-term time-lapse imaging of KG1a cells in the microwell array; 1500 clones were simultaneously cultured and scanned every 3 min at 100 × magnifications for 6 days. The advantages of perfusion microwell culture are continuous long-term cell tracking, higher cell imaging throughput, and greater control over cell microenvironment. Microwell devices facilitate high throughput analysis of cell lineage development and measurement of the probability distribution for cell life events such as mitosis.
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LI HAIRUI, KOCHHAR JASPREETSINGH, PAN JING, CHAN SUIYUNG, KANG LIFENG. NANO/MICROSCALE TECHNOLOGIES FOR DRUG DELIVERY. J MECH MED BIOL 2011. [DOI: 10.1142/s021951941100406x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Nano- and microscale technologies have made a marked impact on the development of drug delivery systems. The loading efficiency and particle size of nano/micro particles can be better controlled with these new technologies than conventional methods. Moreover, drug delivery systems are moving from simple particles to smart particles and devices with programmable functions. These technologies are also contributing to in vitro and in vivo drug testing, which are important to evaluate drug delivery systems. For in vitro tests, lab-on-a-chip models are potentially useful as alternatives to animal models. For in vivo test, nano/micro-biosensors are developed for testing chemicals and biologics with high sensitivity and selectivity. Here, we review the recent development of nanoscale and microscale technologies in drug delivery including drug delivery systems, in vitro and in vivo tests.
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Affiliation(s)
- HAIRUI LI
- Department of Pharmacy, National University of Singapore, 18 Science Drive 4, Singapore 117543, Singapore
| | - JASPREET SINGH KOCHHAR
- Department of Pharmacy, National University of Singapore, 18 Science Drive 4, Singapore 117543, Singapore
| | - JING PAN
- Department of Pharmacy, National University of Singapore, 18 Science Drive 4, Singapore 117543, Singapore
| | - SUI YUNG CHAN
- Department of Pharmacy, National University of Singapore, 18 Science Drive 4, Singapore 117543, Singapore
| | - LIFENG KANG
- Department of Pharmacy, National University of Singapore, 18 Science Drive 4, Singapore 117543, Singapore
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Nieto N, Lutolf MP. Extracellular matrix bioengineering and systems biology approaches in liver disease. SYSTEMS AND SYNTHETIC BIOLOGY 2011; 5:11-20. [PMID: 22654992 DOI: 10.1007/s11693-011-9085-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2011] [Revised: 06/01/2011] [Accepted: 06/06/2011] [Indexed: 12/13/2022]
Abstract
The extracellular matrix (ECM) in the liver as well as in many organs comprises a peripheral network linking numerous macromolecules typically classified into collagens, microfibrillar proteins, proteoglycans, chemokines, growth factors and glycoproteins. In addition to its role as an essential structural and physiological component, it plays a vital role in driving key cellular events such as cell adhesion, migration, proliferation, differentiation and survival. Any structural inherited or acquired defect and/or metabolic or pathologic alteration in the hepatic ECM may cause cellular and organ responses leading to the development or progression of liver disease. Therefore, the ECM molecules are key players in tissue engraftment and in the pathophysiology of liver disease. In this review we provide a snapshot on current efforts for understanding its role in physiological and non-physiological states, by describing how tissue engineering platforms can enhance in vitro and in vivo models of liver disease, by providing examples where bioengineered ECM can serve as systems biology approaches to study the ECM, and then by evaluating pathological protein regulatory networks in the liver using systems biology tools. These approaches hold great promise for future research.
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Hardelauf H, Frimat JP, Stewart JD, Schormann W, Chiang YY, Lampen P, Franzke J, Hengstler JG, Cadenas C, Kunz-Schughart LA, West J. Microarrays for the scalable production of metabolically relevant tumour spheroids: a tool for modulating chemosensitivity traits. LAB ON A CHIP 2011; 11:419-28. [PMID: 21079873 DOI: 10.1039/c0lc00089b] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
We report the use of thin film poly(dimethylsiloxane) (PDMS) prints for the arrayed mass production of highly uniform 3-D human HT29 colon carcinoma spheroids. The spheroids have an organotypic density and, as determined by 3-axis imaging, were genuinely spherical. Critically, the array density impacts growth kinetics and can be tuned to produce spheroids ranging in diameter from 200 to 550 µm. The diffusive limit of competition for media occurred with a pitch of ≥1250 µm and was used for the optimal array-based culture of large, viable spheroids. During sustained culture mass transfer gradients surrounding and within the spheroids are established, and lead to growth cessation, altered expression patterns and the formation of a central secondary necrosis. These features reflect the microenvironment of avascularised tumours, making the array format well suited for the production of model tumours with defined sizes and thus defined spatio-temporal pathophysiological gradients. Experimental windows, before and after the onset of hypoxia, were identified and used with an enzyme activity-based viability assay to measure the chemosensitivity towards irinotecan. Compared to monolayer cultures, a marked reduction in the drug efficacy towards the different spheroid culture states was observed and attributed to cell cycle arrest, the 3-D character, scale and/or hypoxia factors. In summary, spheroid culture using the array format has great potential to support drug discovery and development, as well as tumour biology research.
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Affiliation(s)
- Heike Hardelauf
- Leibniz-Institut für Analytische Wissenschaften-ISAS-e.V., Otto-Hahn-Str. 6b, 44227, Dortmund, Germany
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Randall CL, Kalinin YV, Jamal M, Manohar T, Gracias DH. Three-dimensional microwell arrays for cell culture. LAB ON A CHIP 2011; 11:127-31. [PMID: 21063585 DOI: 10.1039/c0lc00368a] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
We propose the concept of three-dimensional (3D) microwell arrays for cell culture applications and highlight the importance of oxygen diffusion through pores in all three dimensions to enhance cell viability.
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Affiliation(s)
- Christina L Randall
- Department of Biomedical Engineering, The Johns Hopkins University, Baltimore, MD 21205, USA
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Preparation and Characterization of Genetically Engineered Mesenchymal Stem Cell Aggregates for Regenerative Medicine. JOURNAL OF PHARMACEUTICAL INVESTIGATION 2010. [DOI: 10.4333/kps.2010.40.6.333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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41
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Abstract
Oxygen tension is critical in a number of cell pathways but is often overlooked in cell culture. One reason for this is the difficulty in modulating and assessing oxygen tensions without disturbing the culture conditions. Toward this end, a simple method to generate oxygen-sensitive microwells was developed through embossing polystyrene (PS) and platinum(ii) octaethylporphyrin ketone (PtOEPK) thin films. In addition to monitoring the oxygen tension, microwells were employed in order to isolate uniform clusters of cells in microwells. The depth and width of the microwells can be adapted to different experimental parameters easily by altering the thin film processing or embossing stamp geometries. The thin oxygen sensitive microwell substrate is also compatible with high magnification modalities such as confocal imaging. The incorporation of the oxygen sensor into the microwells produces measurements of the oxygen tension near the cell surface. The oxygen sensitive microwells were calibrated and used to monitor oxygen tensions of Madin-Darby Canine Kidney Cells (MDCKs) cultured at high and low densities as a proof of concept. Wells 500 µm in diameter seeded with an average of 330 cells exhibited an oxygen level of 12.6% whereas wells seeded with an average of 20 cells per well exhibited an oxygen level of 19.5%, a 35.7% difference. This platform represents a new tool for culturing cells in microwells in a format amenable to high magnification imaging while monitoring the oxygen state of the culture media.
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Affiliation(s)
- Elly Sinkala
- Department of Bioengineering, University of Illinois at Chicago, USA
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Pelaez-Vargas A, Gallego-Perez D, Ferrell N, Fernandes MH, Hansford D, Monteiro FJ. Early spreading and propagation of human bone marrow stem cells on isotropic and anisotropic topographies of silica thin films produced via microstamping. MICROSCOPY AND MICROANALYSIS : THE OFFICIAL JOURNAL OF MICROSCOPY SOCIETY OF AMERICA, MICROBEAM ANALYSIS SOCIETY, MICROSCOPICAL SOCIETY OF CANADA 2010; 16:670-676. [PMID: 20964878 DOI: 10.1017/s1431927610094158] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
While there has been rapid development of microfabrication techniques to produce high-resolution surface modifications on a variety of materials in the last decade, there is still a strong need to produce novel alternatives to induce guided tissue regeneration on dental implants. High-resolution microscopy provides qualitative and quantitative techniques to study cellular guidance in the first stages of cell-material interactions. The purposes of this work were (1) to produce and characterize the surface topography of isotropic and anisotropic microfabricated silica thin films obtained by sol-gel processing, and (2) to compare the in vitro biological behavior of human bone marrow stem cells on these surfaces at early stages of adhesion and propagation. The results confirmed that a microstamping technique can be used to produce isotropic and anisotropic micropatterned silica coatings. Atomic force microscopy analysis was an adequate methodology to study in the same specimen the sintering derived contraction of the microfabricated coatings, using images obtained before and after thermal cycle. Hard micropatterned coatings induced a modulation in the early and late adhesion stages of cell-material and cell-cell interactions in a geometry-dependent manner (i.e., isotropic versus anisotropic), as it was clearly determined, using scanning electron and fluorescence microscopies.
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Affiliation(s)
- A Pelaez-Vargas
- INEB - Instituto de Engenharia Biomédica and Universidade do Porto, Faculdade de Engenharia, Departamento de Engenharia Metalúrgica e Materiais, Porto, Portugal.
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Affiliation(s)
- Dario Lombardi
- Department of Chemistry and Applied Biosciences, ETH Zurich, Wolfgang-Pauli-Str. 10, CH-8093 Zurich, Switzerland
| | - Petra S Dittrich
- Department of Chemistry and Applied Biosciences, ETH Zurich, Wolfgang-Pauli-Str. 10, CH-8093 Zurich, Switzerland
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Lim YC, Johnson J, Fei Z, Wu Y, Farson DF, Lannutti JJ, Choi HW, Lee LJ. Micropatterning and characterization of electrospun poly(ε-caprolactone)/gelatin nanofiber tissue scaffolds by femtosecond laser ablation for tissue engineering applications. Biotechnol Bioeng 2010; 108:116-26. [DOI: 10.1002/bit.22914] [Citation(s) in RCA: 99] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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45
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Torisawa YS, Mosadegh B, Cavnar SP, Ho M, Takayama S. Transwells with microstamped membranes produce micropatterned two-dimensional and three-dimensional co-cultures. Tissue Eng Part C Methods 2010; 17:61-7. [PMID: 20673133 DOI: 10.1089/ten.tec.2010.0305] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
This article describes a simple and rapid cell patterning method to form co-culture microarrays in commercially available Transwells. A thin poly(dimethylsiloxane) (PDMS) layer is printed on the underside of a Transwell using a PDMS stamp. Arbitrary cellular patterns are generated according to the geometric features of the thin PDMS layer through hydrodynamic forces that guide cells onto the membrane only over the PDMS-uncoated regions. Micropatterns of surface-adhered cells (we refer to this as two-dimensional) or non-surface-adhered clusters of cells (we refer to this as three-dimensional) can be generated depending on the surface treatment of the filter membrane. Additionally, co-cultures can be established by introducing different types of cells on the membrane or in the bottom chamber of the Transwell. We show that this co-culture method can evaluate mouse embryonic stem (mES) cell differentiation based on heterogeneous cell-cell interactions. Co-culture of mES cells and HepG2 cells decreased SOX17 expression of mES cells, and direct cell-cell contact further decreased SOX17 expression, indicating that co-culture with HepG2 cells inhibits endoderm differentiation through soluble factors and cell-cell contact. This method is simple and user-friendly and should be broadly useful to study cell shapes and cell-cell interactions.
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Affiliation(s)
- Yu-Suke Torisawa
- 1 Department of Biomedical Engineering, University of Michigan , Ann Arbor, Michigan
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