1
|
Hamonangan WM, Lee S, Choi YH, Li W, Tai M, Kim SH. Microballoons: Osmotically-inflated elastomer shells for ultrafast release of encapsulants and mechanical energy. J Colloid Interface Sci 2024; 668:272-281. [PMID: 38678883 DOI: 10.1016/j.jcis.2024.04.146] [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: 01/18/2024] [Revised: 04/16/2024] [Accepted: 04/20/2024] [Indexed: 05/01/2024]
Abstract
HYPOTHESIS Microcapsules with osmotically-inflated elastic shells exhibit an ultrafast release of encapsulants while mechanically stimulating the microenvironments, akin to popping balloons. EXPERIMENTS To prepare elastic shells with uniform thickness and size, monodisperse water-in-oil-in-water (W/O/W) double-emulsion drops are produced in a capillary microfluidic device. The polydimethylsiloxane (PDMS)-containing oil phase is thermally cured to create the elastic shell. The elastic shells are inflated by pumping water into the lumen in hypotonic conditions. The inflated microcapsules produced undergo mechanical compression, and their release properties are studied. FINDINGS By controlling the osmotic pressure difference, Microballoons are inflated into a diameter of 200 μm - 316 μm and shell thickness of 7.8 μm - 0.7 µm, respectively. The inflated shell pops due to mechanical failure when subjected to mechanical stress above a certain threshold, resembling a balloon. During popping, the stretched shell rapidly retracts to the original uninflated state, resulting in an ultrafast release of encapsulants from the lumen within a millisecond. This process converts elastic potential energy stored in the shell into mechanical energy with substantial power. The microballoons mechanically stimulate the local environment, leading to the direct and rapid release of encapsulants. This has the potential to improve absorption efficiency.
Collapse
Affiliation(s)
- Wahyu Martumpal Hamonangan
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Sangmin Lee
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Ye Hun Choi
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Wanzhao Li
- Infinitus (China) Company Ltd, Guangzhou 510405, China
| | - Meiling Tai
- Infinitus (China) Company Ltd, Guangzhou 510405, China.
| | - Shin-Hyun Kim
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea.
| |
Collapse
|
2
|
Ghosh R, Arnheim A, van Zee M, Shang L, Soemardy C, Tang RC, Mellody M, Baghdasarian S, Sanchez Ochoa E, Ye S, Chen S, Williamson C, Karunaratne A, Di Carlo D. Lab on a Particle Technologies. Anal Chem 2024; 96:7817-7839. [PMID: 38650433 PMCID: PMC11112544 DOI: 10.1021/acs.analchem.4c01510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2024] [Revised: 04/14/2024] [Accepted: 04/16/2024] [Indexed: 04/25/2024]
Affiliation(s)
- Rajesh Ghosh
- Department
of Bioengineering, University of California,
Los Angeles, Los Angeles, California 90095, United States
| | - Alyssa Arnheim
- Department
of Bioengineering, University of California,
Los Angeles, Los Angeles, California 90095, United States
| | - Mark van Zee
- Department
of Bioengineering, University of California,
Los Angeles, Los Angeles, California 90095, United States
| | - Lily Shang
- Department
of Bioengineering, University of California,
Los Angeles, Los Angeles, California 90095, United States
| | - Citradewi Soemardy
- Department
of Bioengineering, University of California,
Los Angeles, Los Angeles, California 90095, United States
| | - Rui-Chian Tang
- Department
of Bioengineering, University of California,
Los Angeles, Los Angeles, California 90095, United States
| | - Michael Mellody
- Department
of Bioengineering, University of California,
Los Angeles, Los Angeles, California 90095, United States
| | - Sevana Baghdasarian
- Department
of Bioengineering, University of California,
Los Angeles, Los Angeles, California 90095, United States
| | - Edwin Sanchez Ochoa
- Department
of Bioengineering, University of California,
Los Angeles, Los Angeles, California 90095, United States
| | - Shun Ye
- Department
of Bioengineering, University of California,
Los Angeles, Los Angeles, California 90095, United States
| | - Siyu Chen
- Department
of Bioengineering, University of California,
Los Angeles, Los Angeles, California 90095, United States
| | - Cayden Williamson
- Department
of Bioengineering, University of California,
Los Angeles, Los Angeles, California 90095, United States
| | - Amrith Karunaratne
- Department
of Bioengineering, University of California,
Los Angeles, Los Angeles, California 90095, United States
| | - Dino Di Carlo
- Department
of Bioengineering, University of California,
Los Angeles, Los Angeles, California 90095, United States
- Jonsson
Comprehensive Cancer Center, University
of California, Los Angeles, Los Angeles, California 90095, United States
- Department
of Mechanical and Aerospace Engineering, University of California, Los Angeles, Los Angeles, California 90095, United States
- California
NanoSystems Institute, Los Angeles, California 90095, United States
| |
Collapse
|
3
|
Chen J, Liu Z, Wang Z, Zhang X, Zhang Y, Zhan Z, Gong X, Xu T. One-step biofabrication of liquid core-GelMa shell microbeads for in situ hollow cell ball self-assembly. Regen Biomater 2024; 11:rbae021. [PMID: 38525324 PMCID: PMC10960924 DOI: 10.1093/rb/rbae021] [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: 12/10/2023] [Revised: 01/14/2024] [Accepted: 02/09/2024] [Indexed: 03/26/2024] Open
Abstract
There are many instances of hollow-structure morphogenesis in the development of tissues. Thus, the fabrication of hollow structures in a simple, high-throughput and homogeneous manner with proper natural biomaterial combination is valuable for developmental studies and tissue engineering, while it is a significant challenge in biofabrication field. We present a novel method for the fabrication of a hollow cell module using a coaxial co-flow capillary microfluidic device. Sacrificial gelatin laden with cells in the inner layer and GelMa in the outer layer are used via a coaxial co-flow capillary microfluidic device to produce homogenous micro-beads. The overall and core sizes of core-shell microbeads were well controlled. When using human vein vascular endothelial cells to demonstrate how cells line the inner surface of core-shell beads, as the core liquifies, a hollow cell ball with asymmetric features is fabricated. After release from the GelMa shell, individual cell balls are obtained and deformed cell balls can self-recover. This platform paves way for complex hollow tissue modeling in vitro, and further modulation of matrix stiffness, curvature and biochemical composition to mimic in vivo microenvironments.
Collapse
Affiliation(s)
- Jianwei Chen
- Bio-intelligent Manufacturing and Living Matter Bioprinting Center, Research Institute of Tsinghua University in Shenzhen, Tsinghua University, Shenzhen 518057, People’s Republic of China
- Precision Medicine and Healthcare Research Center, Tsinghua-Berkeley Shenzhen Institute (TBSI), Tsinghua University, Shenzhen 518055, People’s Republic of China
| | - Zeyang Liu
- Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen, Nanshan District, People’s Republic of China
| | - Zixian Wang
- Precision Medicine and Healthcare Research Center, Tsinghua-Berkeley Shenzhen Institute (TBSI), Tsinghua University, Shenzhen 518055, People’s Republic of China
| | - Xiuxiu Zhang
- Precision Medicine and Healthcare Research Center, Tsinghua-Berkeley Shenzhen Institute (TBSI), Tsinghua University, Shenzhen 518055, People’s Republic of China
| | - Yi Zhang
- Precision Medicine and Healthcare Research Center, Tsinghua-Berkeley Shenzhen Institute (TBSI), Tsinghua University, Shenzhen 518055, People’s Republic of China
| | - Zhen Zhan
- Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen, Nanshan District, People’s Republic of China
| | - Xiaohua Gong
- School of Optometry and Vision Science Program, University of California, Berkeley, CA 94720, USA
| | - Tao Xu
- Bio-intelligent Manufacturing and Living Matter Bioprinting Center, Research Institute of Tsinghua University in Shenzhen, Tsinghua University, Shenzhen 518057, People’s Republic of China
- Precision Medicine and Healthcare Research Center, Tsinghua-Berkeley Shenzhen Institute (TBSI), Tsinghua University, Shenzhen 518055, People’s Republic of China
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, People’s Republic of China
| |
Collapse
|
4
|
Crosslinking Strategies for the Microfluidic Production of Microgels. Molecules 2021; 26:molecules26123752. [PMID: 34202959 PMCID: PMC8234156 DOI: 10.3390/molecules26123752] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2021] [Revised: 06/17/2021] [Accepted: 06/18/2021] [Indexed: 02/03/2023] Open
Abstract
This article provides a systematic review of the crosslinking strategies used to produce microgel particles in microfluidic chips. Various ionic crosslinking methods for the gelation of charged polymers are discussed, including external gelation via crosslinkers dissolved or dispersed in the oil phase; internal gelation methods using crosslinkers added to the dispersed phase in their non-active forms, such as chelating agents, photo-acid generators, sparingly soluble or slowly hydrolyzing compounds, and methods involving competitive ligand exchange; rapid mixing of polymer and crosslinking streams; and merging polymer and crosslinker droplets. Covalent crosslinking methods using enzymatic oxidation of modified biopolymers, photo-polymerization of crosslinkable monomers or polymers, and thiol-ene “click” reactions are also discussed, as well as methods based on the sol−gel transitions of stimuli responsive polymers triggered by pH or temperature change. In addition to homogeneous microgel particles, the production of structurally heterogeneous particles such as composite hydrogel particles entrapping droplet interface bilayers, core−shell particles, organoids, and Janus particles are also discussed. Microfluidics offers the ability to precisely tune the chemical composition, size, shape, surface morphology, and internal structure of microgels by bringing multiple fluid streams in contact in a highly controlled fashion using versatile channel geometries and flow configurations, and allowing for controlled crosslinking.
Collapse
|
5
|
Dhand AP, Poling-Skutvik R, Osuji CO. Simple production of cellulose nanofibril microcapsules and the rheology of their suspensions. SOFT MATTER 2021; 17:4517-4524. [PMID: 33710229 DOI: 10.1039/d1sm00225b] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Microcapsules are commonly used in applications ranging from therapeutics to personal care products due to their ability to deliver encapsulated species through their porous shells. Here, we demonstrate a simple and scalable approach to fabricate microcapsules with porous shells by interfacial complexation of cellulose nanofibrils and oleylamine, and investigate the rheological properties of suspensions of the resulting microcapsules. The suspensions of neat capsules are viscous liquids whose viscosity increases with volume fraction according to a modified Kreiger-Dougherty relation with a maximum packing fraction of 0.74 and an intrinsic viscosity of 4.1. When polyacrylic acid (PAA) is added to the internal phase of the microcapsules, however, the suspensions become elastic and display yield stresses with power-law dependencies on capsule volume fraction and PAA concentration. The elasticity appears to originate from associative microcapsule interactions induced by PAA that is contained within and incorporated into the microcapsule shell. These results demonstrate that it is possible to tune the rheological properties of microcapsule suspensions by changing only the composition of the internal phase, thereby providing a novel method to tailor complex fluid rheology.
Collapse
Affiliation(s)
- Abhishek P Dhand
- Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA.
| | - Ryan Poling-Skutvik
- Department of Chemical Engineering, University of Rhode Island, Kingston, RI 02881, USA.
| | - Chinedum O Osuji
- Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA.
| |
Collapse
|
6
|
Liu Z, Zhang H, Zhan Z, Nan H, Huang N, Xu T, Gong X, Hu C. Mild formation of core-shell hydrogel microcapsules for cell encapsulation. Biofabrication 2020; 13. [PMID: 33271516 DOI: 10.1088/1758-5090/abd076] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Accepted: 12/03/2020] [Indexed: 12/15/2022]
Abstract
Internal gelation has been an important sol-gel route for the preparation of spherical microgel for drug delivery, cell therapy, or tissue regeneration. Despite high homogeneity and permeability, the internal gelated microgels often result in weak mechanical stability, unregular interface morphology and low cell survival rate. In this work, we have extensively improved the existing internal gelation approach and core-shell hydrogel microcapsules (200-600 μm) with a smooth surface, high mechanical stability and cell survival rate, are successfully prepared by using internal gelation. A coaxial flow-focusing capillary-assembled microfluidic (CFCM) device was developed for the gelation. Rapid gelling behavior of alginate in the internal gelation makes it suitable for producing well-defined and homogenous alginate hydrogel microstructures that serve as the shell of the microcapsules. 2-[4-(2-hydroxyethyl)piperazin-1-yl]ethanesulfonic acid (HEPES) was used in the shell stream during the internal gelation. Thus, a high concentration of acid in the oil solution can be used for better crosslinking the alginate while maintaining high cell viability. We further demonstrated that the gelation conditions in our approach were mild enough for encapsulating HepG2 cells and 3T3 fibroblasts without losing their viability and functionality in a co-culture environment.
Collapse
Affiliation(s)
- Zeyang Liu
- Stem Cell Therapy and Regenerative Medicine Lab, Tsinghua-Berkeley Shenzhen Institute (TBSI), No.1001 Xueyuan Avenue, Nanshan District, Shenzhen, China., Shenzhen, Beijing, 518000, CHINA
| | - Hongyong Zhang
- Department of Mechanical and Energy Engineering, Southern University of Science and Technology, No. 1088 Xueyuan Avenue, Nanshan District, China., Shenzhen, Guangdong, 518000, CHINA
| | - Zhen Zhan
- Department of Mechanical and Energy Engineering, Southern University of Science and Technology, No. 1088 Xueyuan Avenue, Nanshan District, China., Shenzhen, Guangdong, 518000, CHINA
| | - Haochen Nan
- Department of Mechanical and Energy Engineering, Southern University of Science and Technology, No. 1088 Xueyuan Avenue, Nanshan District, China., Shenzhen, Guangdong, 518000, CHINA
| | - Nan Huang
- Department of Mechanical and Energy Engineering, Southern University of Science and Technology, No. 1088 Xueyuan Avenue, Nanshan District, China., Shenzhen, Guangdong, 518000, CHINA
| | - Tao Xu
- Stem Cell Therapy and Regenerative Medicine Lab, Tsinghua-Berkeley Shenzhen Institute (TBSI), No.1001 Xueyuan Avenue, Nanshan District, Shenzhen, China., Shenzhen, Beijing, 518000, CHINA
| | - Xiaohua Gong
- School of Optometry and Vision Science Program, University of California Berkeley, 380 Minor Ln, Berkeley, CA 94720, USA, Berkeley, California, CA 94720, UNITED STATES
| | - Chengzhi Hu
- Mechanical and Energy Eningeering, Southern University of Science and Technology, NoNo. 1088 Xueyuan Avenue, Nanshan District, China., Shenzhen, 518000, CHINA
| |
Collapse
|
7
|
Mohamed MGA, Ambhorkar P, Samanipour R, Yang A, Ghafoor A, Kim K. Microfluidics-based fabrication of cell-laden microgels. BIOMICROFLUIDICS 2020; 14:021501. [PMID: 32161630 PMCID: PMC7058428 DOI: 10.1063/1.5134060] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Accepted: 02/16/2020] [Indexed: 05/02/2023]
Abstract
Microfluidic principles have been extensively utilized as powerful tools to fabricate controlled monodisperse cell-laden hydrogel microdroplets for various biological applications, especially tissue engineering. In this review, we report recent advances in microfluidic-based droplet fabrication and provide our rationale to justify the superiority of microfluidics-based techniques over other microtechnology methods in achieving the encapsulation of cells within hydrogels. The three main components of such a system-hydrogels, cells, and device configurations-are examined thoroughly. First, the characteristics of various types of hydrogels including natural and synthetic types, especially concerning cell encapsulation, are examined. This is followed by the elucidation of the reasoning behind choosing specific cells for encapsulation. Next, in addition to a detailed discussion of their respective droplet formation mechanisms, various device configurations including T-junctions, flow-focusing, and co-flowing that aid in achieving cell encapsulation are critically reviewed. We then present an outlook on the current applications of cell-laden hydrogel droplets in tissue engineering such as 3D cell culturing, rapid generation and repair of tissues, and their usage as platforms for studying cell-cell and cell-microenvironment interactions. Finally, we shed some light upon the prospects of microfluidics-based production of cell-laden microgels and propose some directions for forthcoming research that can aid in overcoming challenges currently impeding the translation of the technology into clinical success.
Collapse
Affiliation(s)
- Mohamed G. A. Mohamed
- School of Engineering, University of British Columbia, Kelowna, British Columbia V1V 1V7, Canada
| | - Pranav Ambhorkar
- School of Engineering, University of British Columbia, Kelowna, British Columbia V1V 1V7, Canada
| | - Roya Samanipour
- School of Engineering, University of British Columbia, Kelowna, British Columbia V1V 1V7, Canada
| | - Annie Yang
- School of Engineering, University of British Columbia, Kelowna, British Columbia V1V 1V7, Canada
| | - Ali Ghafoor
- Irving K. Barber School of Arts and Sciences, University of British Columbia, Kelowna, British Columbia V1V 1V7, Canada
| | | |
Collapse
|
8
|
Zheng Z, Wang H, Li J, Shi Q, Cui J, Sun T, Huang Q, Fukuda T. 3D Construction of Shape-Controllable Tissues through Self-Bonding of Multicellular Microcapsules. ACS APPLIED MATERIALS & INTERFACES 2019; 11:22950-22961. [PMID: 31252493 DOI: 10.1021/acsami.9b05108] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Designed microtissues that replicate highly ordered three-dimensional (3D) multicellular in vivo structures have shown huge potential in biomedical research and drug discovery. Through microencapsulation and microfluidic techniques, cell-laden microcapsules have been widely used as pathological or pharmacological models. However, most conventional microtissue construction strategies can only engineer simply predefined microcapsules with monotonous biological components in two dimensions. Here, we propose a flexible 3D microtissue construction method through self-bonding of real-time shape-programmable microcapsules. The microcapsules are prepared by photo-induced electrodeposition of cell-laden alginate hydrogel and flexibly tailored into tissue-specific shapes, sizes, and arbitrary biocomponents. With the local fluidics-guided assembly, the microcapsules are spatially organized into 3D perfectly aligned microtissues. To mimic in vivo intercellular connection, the aligned microcapsules are precoated with fibroblasts to self-bond the adjacent layers into a robust assemblage through fibroblast-extracellular matrix interactions, which highly reproduces the tissue morphogenesis in natural organisms. As a typical complex tissue model, the 3D hepatic lobule was engineered utilizing HepG2 cells seeded into microcapsules with a fibroblast coating, and its biofunction including albumin and urea secretion was improved by nearly two-fold compared with cells seeded without a fibroblast coating. We anticipate that our method will be capable of regenerating more complex multicellular constructs with unprecedented possibilities for future tissue engineering applications.
Collapse
Affiliation(s)
- Zhiqiang Zheng
- Intelligent Robotics Institute, School of Mechatronical Engineering , Beijing Institute of Technology , 5 South Zhongguancun Street , Haidian District, Beijing 100081 , China
| | - Huaping Wang
- Intelligent Robotics Institute, School of Mechatronical Engineering , Beijing Institute of Technology , 5 South Zhongguancun Street , Haidian District, Beijing 100081 , China
| | - Jianing Li
- Intelligent Robotics Institute, School of Mechatronical Engineering , Beijing Institute of Technology , 5 South Zhongguancun Street , Haidian District, Beijing 100081 , China
| | - Qing Shi
- Intelligent Robotics Institute, School of Mechatronical Engineering , Beijing Institute of Technology , 5 South Zhongguancun Street , Haidian District, Beijing 100081 , China
| | - Juan Cui
- Intelligent Robotics Institute, School of Mechatronical Engineering , Beijing Institute of Technology , 5 South Zhongguancun Street , Haidian District, Beijing 100081 , China
| | - Tao Sun
- Intelligent Robotics Institute, School of Mechatronical Engineering , Beijing Institute of Technology , 5 South Zhongguancun Street , Haidian District, Beijing 100081 , China
| | - Qiang Huang
- Intelligent Robotics Institute, School of Mechatronical Engineering , Beijing Institute of Technology , 5 South Zhongguancun Street , Haidian District, Beijing 100081 , China
| | - Toshio Fukuda
- Intelligent Robotics Institute, School of Mechatronical Engineering , Beijing Institute of Technology , 5 South Zhongguancun Street , Haidian District, Beijing 100081 , China
| |
Collapse
|
9
|
Morimoto Y, Mori N, Takeuchi S. In Vitro Tissue Construction for Organ-on-a-Chip Applications. Bioanalysis 2019. [DOI: 10.1007/978-981-13-6229-3_9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
|
10
|
Lee JK, Choi IS, Oh TI, Lee E. Cell-Surface Engineering for Advanced Cell Therapy. Chemistry 2018; 24:15725-15743. [PMID: 29791047 DOI: 10.1002/chem.201801710] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Revised: 05/22/2018] [Indexed: 12/16/2022]
Abstract
Stem cells opened great opportunity to overcome diseases that conventional therapy had only limited success. Use of scaffolds made from biomaterials not only helps handling of stem cells for delivery or transplantation but also supports enhanced cell survival. Likewise, cell encapsulation can provide stability for living animal cells even in a state of separateness. Although various chemical reactions were tried to encapsulate stolid microbial cells such as yeasts, a culture environment for the growth of animal cells allows only highly biocompatible reactions. Therefore, the animal cells were mostly encapsulated in hydrogels, which resulted in enhanced cell survival. Interestingly, major findings of chemistry on biological interfaces demonstrate that cell encapsulation in hydrogels have a further a competence for modulating cell characteristics that can go beyond just enhancing the cell survival. In this review, we present a comprehensive overview on the chemical reactions applied to hydrogel-based cell encapsulation and their effects on the characteristics and behavior of living animal cells.
Collapse
Affiliation(s)
- Jungkyu K Lee
- Department of Chemistry and Green-Nano Materials Research Center, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu, 41566, Korea
| | - Insung S Choi
- Department of Chemistry and Center for Cell-Encapsulation Research, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Korea
| | - Tong In Oh
- Department of Biomedical Engineering, Kyung Hee University, 23 Kyungheedae-ro, Dongdaemun-gu, Seoul, 02447, Korea
| | - EunAh Lee
- Impedance Imaging Research Center (IIRC), Kyung Hee University, 23 Kyungheedae-ro, Dongdaemun-gu, Seoul, 02447, Korea
| |
Collapse
|
11
|
Zhao G, Liu X, Zhu K, He X. Hydrogel Encapsulation Facilitates Rapid-Cooling Cryopreservation of Stem Cell-Laden Core-Shell Microcapsules as Cell-Biomaterial Constructs. Adv Healthc Mater 2017; 6:10.1002/adhm.201700988. [PMID: 29178480 PMCID: PMC5729581 DOI: 10.1002/adhm.201700988] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2017] [Revised: 09/30/2017] [Indexed: 01/08/2023]
Abstract
Core-shell structured stem cell microencapsulation in hydrogel has wide applications in tissue engineering, regenerative medicine, and cell-based therapies because it offers an ideal immunoisolative microenvironment for cell delivery and 3D culture. Long-term storage of such microcapsules as cell-biomaterial constructs by cryopreservation is an enabling technology for their wide distribution and ready availability for clinical transplantation. However, most of the existing studies focus on cryopreservation of single cells or cells in microcapsules without a core-shell structure (i.e., hydrogel beads). The goal of this study is to achieve cryopreservation of stem cells encapsulated in core-shell microcapsules as cell-biomaterial constructs or biocomposites. To this end, a capillary microfluidics-based core-shell alginate hydrogel encapsulation technology is developed to produce porcine adipose-derived stem cell-laden microcapsules for vitreous cryopreservation with very low concentration (2 mol L-1 ) of cell membrane penetrating cryoprotective agents (CPAs) by suppressing ice formation. This may provide a low-CPA and cost-effective approach for vitreous cryopreservation of "ready-to-use" stem cell-biomaterial constructs, facilitating their off-the-shelf availability and widespread applications.
Collapse
Affiliation(s)
- Gang Zhao
- Department of Electronic Science and Technology, University of Science and Technology of China, Hefei, Anhui, 230027, China
| | - Xiaoli Liu
- Department of Electronic Science and Technology, University of Science and Technology of China, Hefei, Anhui, 230027, China
| | - Kaixuan Zhu
- Department of Electronic Science and Technology, University of Science and Technology of China, Hefei, Anhui, 230027, China
| | - Xiaoming He
- Department of Biomedical Engineering, The Ohio State University, Columbus, OH, 43210, USA
| |
Collapse
|
12
|
Morimoto Y, Onuki M, Takeuchi S. Mass Production of Cell-Laden Calcium Alginate Particles with Centrifugal Force. Adv Healthc Mater 2017; 6. [PMID: 28426183 DOI: 10.1002/adhm.201601375] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Revised: 01/26/2017] [Indexed: 12/21/2022]
Abstract
This paper describes a centrifuge-based device for oil-free and mass production of calcium-alginate (Ca-alginate) particles. The device is composed of four components: a tank with a glass capillary for forming sodium alginate droplets, a collecting bath with calcium chloride (CaCl2 ) solution, a waste liquid box, and a bypass channel bridged between the collecting bath and the waste liquid box. When the device is centrifuged, extra CaCl2 solution in the collecting bath is delivered to the waste liquid box to maintain the appropriate liquid level of CaCl2 solution for the production of monodisperse Ca-alginate particles. The proposed device enables oil-free production of over 45 000 uniformly sized Ca-alginate particles in a single 240 s process, whereas using the conventional method with only a glass capillary, ≈1000 particles are formed within the same processing time. Because of the high biocompatibility of the oil-free process, the device is applicable to cell encapsulation in Ca-alginate particles with high cell viability, as well as the formation of a macroscopic 3D cellular structure using Ca-alginate particles covered with cells as assembly modules. These results suggest that the device can be a useful tool for preparing experimental platforms in biomedical and tissue engineering fields.
Collapse
Affiliation(s)
- Yuya Morimoto
- Center for International Research on Integrative Biomedical Systems (CIBiS); Institute of Industrial Science (IIS); The University of Tokyo; 4-6-1 Komaba Meguro-ku Tokyo 153-8505 Japan
| | - Maiko Onuki
- Center for International Research on Integrative Biomedical Systems (CIBiS); Institute of Industrial Science (IIS); The University of Tokyo; 4-6-1 Komaba Meguro-ku Tokyo 153-8505 Japan
| | - Shoji Takeuchi
- Center for International Research on Integrative Biomedical Systems (CIBiS); Institute of Industrial Science (IIS); The University of Tokyo; 4-6-1 Komaba Meguro-ku Tokyo 153-8505 Japan
- Takeuchi Biohybrid innovation Project; ERATO; Japan Science and Technology (JST); Komaba Open Laboratory (KOL) Room M202; 4-6-1 Komaba Meguro-ku Tokyo 153-8904 Japan
| |
Collapse
|
13
|
Cui X, Hartanto Y, Zhang H. Advances in multicellular spheroids formation. J R Soc Interface 2017; 14:20160877. [PMID: 28202590 PMCID: PMC5332573 DOI: 10.1098/rsif.2016.0877] [Citation(s) in RCA: 292] [Impact Index Per Article: 41.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Accepted: 01/11/2017] [Indexed: 12/20/2022] Open
Abstract
Three-dimensional multicellular spheroids (MCSs) have a complex architectural structure, dynamic cell-cell/cell-matrix interactions and bio-mimicking in vivo microenvironment. As a fundamental building block for tissue reconstruction, MCSs have emerged as a powerful tool to narrow down the gap between the in vitro and in vivo model. In this review paper, we discussed the structure and biology of MCSs and detailed fabricating methods. Among these methods, the approach in microfluidics with hydrogel support for MCS formation is promising because it allows essential cell-cell/cell-matrix interactions in a confined space.
Collapse
Affiliation(s)
- X Cui
- School of Chemical Engineering, University of Adelaide, Adelaide, South Australia 5005, Australia
| | - Y Hartanto
- School of Chemical Engineering, University of Adelaide, Adelaide, South Australia 5005, Australia
| | - H Zhang
- School of Chemical Engineering, University of Adelaide, Adelaide, South Australia 5005, Australia
| |
Collapse
|
14
|
Doméjean H, de la Motte Saint Pierre M, Funfak A, Atrux-Tallau N, Alessandri K, Nassoy P, Bibette J, Bremond N. Controlled production of sub-millimeter liquid core hydrogel capsules for parallelized 3D cell culture. LAB ON A CHIP 2016; 17:110-119. [PMID: 27869911 DOI: 10.1039/c6lc00848h] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Liquid core capsules having a hydrogel membrane are becoming a versatile tool for three-dimensional culture of micro-organisms and mammalian cells. Making sub-millimeter capsules at a high rate, via the breakup of a compound jet in air, opens the way to high-throughput screening applications. However, control of the capsule size monodispersity, especially required for quantitative bioassays, was still lacking. Here, we report how the understanding of the underlying hydrodynamic instabilities that occur during the process can lead to calibrated core-shell bioreactors. The requirements are: i) damping the shear layer instability that develops inside the injector arising from the co-annular flow configuration of liquid phases having contrasting viscoelastic properties; ii) controlling the capillary instability of the compound jet by superposing a harmonic perturbation onto the shell flow; iii) avoiding coalescence of drops during jet fragmentation as well as during drop flight towards the gelling bath; iv) ensuring proper engulfment of the compound drops into the gelling bath for building a closed hydrogel shell. We end up with the creation of numerous identical compartments in which cells are able to form multicellular aggregates, namely spheroids. In addition, we implement an intermediate composite hydrogel layer, composed of alginate and collagen, allowing cell adhesion and thus the formation of epithelia or monolayers of cells.
Collapse
Affiliation(s)
- Hugo Doméjean
- Laboratoire Colloïdes et Matériaux Divisés, CNRS, Chemistry Biology & Innovation, ESPCI Paris, PSL Research University, 10 Rue Vauquelin, F-75005 Paris, France.
| | - Mathieu de la Motte Saint Pierre
- Laboratoire Colloïdes et Matériaux Divisés, CNRS, Chemistry Biology & Innovation, ESPCI Paris, PSL Research University, 10 Rue Vauquelin, F-75005 Paris, France.
| | - Anette Funfak
- Laboratoire Colloïdes et Matériaux Divisés, CNRS, Chemistry Biology & Innovation, ESPCI Paris, PSL Research University, 10 Rue Vauquelin, F-75005 Paris, France.
| | - Nicolas Atrux-Tallau
- Laboratoire Colloïdes et Matériaux Divisés, CNRS, Chemistry Biology & Innovation, ESPCI Paris, PSL Research University, 10 Rue Vauquelin, F-75005 Paris, France.
| | - Kevin Alessandri
- LP2N, Université de Bordeaux, F-33400 Talence, France and LP2N, UMR 5298, Institut d'Optique & CNRS, F-33400 Talence, France
| | - Pierre Nassoy
- LP2N, Université de Bordeaux, F-33400 Talence, France and LP2N, UMR 5298, Institut d'Optique & CNRS, F-33400 Talence, France
| | - Jérôme Bibette
- Laboratoire Colloïdes et Matériaux Divisés, CNRS, Chemistry Biology & Innovation, ESPCI Paris, PSL Research University, 10 Rue Vauquelin, F-75005 Paris, France.
| | - Nicolas Bremond
- Laboratoire Colloïdes et Matériaux Divisés, CNRS, Chemistry Biology & Innovation, ESPCI Paris, PSL Research University, 10 Rue Vauquelin, F-75005 Paris, France.
| |
Collapse
|
15
|
Vessel-like channels supported by poly-l-lysine tubes. J Biosci Bioeng 2016; 122:753-757. [DOI: 10.1016/j.jbiosc.2016.05.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2016] [Revised: 05/24/2016] [Accepted: 05/28/2016] [Indexed: 11/19/2022]
|
16
|
Rossow T, Lienemann PS, Mooney DJ. Cell Microencapsulation by Droplet Microfluidic Templating. MACROMOL CHEM PHYS 2016. [DOI: 10.1002/macp.201600380] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Torsten Rossow
- John A. Paulson School of Engineering and Applied Sciences; Harvard University; Cambridge MA 02138 USA
- Wyss Institute for Biologically Inspired Engineering; Cambridge MA 02138 USA
| | - Philipp S. Lienemann
- John A. Paulson School of Engineering and Applied Sciences; Harvard University; Cambridge MA 02138 USA
- Wyss Institute for Biologically Inspired Engineering; Cambridge MA 02138 USA
| | - David J. Mooney
- John A. Paulson School of Engineering and Applied Sciences; Harvard University; Cambridge MA 02138 USA
- Wyss Institute for Biologically Inspired Engineering; Cambridge MA 02138 USA
| |
Collapse
|
17
|
Håti AG, Bassett DC, Ribe JM, Sikorski P, Weitz DA, Stokke BT. Versatile, cell and chip friendly method to gel alginate in microfluidic devices. LAB ON A CHIP 2016; 16:3718-3727. [PMID: 27546333 DOI: 10.1039/c6lc00769d] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Alginate is used extensively in microfluidic devices to produce discrete beads or fibres at the microscale. Such structures may be used to encapsulate sensitive cargoes such as cells and biomolecules. On chip gelation of alginate represents a significant challenge since gelling kinetics or physicochemical conditions are not biocompatible. Here we present a new method that offers a hitherto unprecedented level of control over the gelling kinetics and pH applied to the encapsulation of a variety of cells in both bead and fibre geometries. This versatile approach proved straightforward to adjust to achieve appropriate solution conditions required for implementation in microfluidic devices and resulted in highly reliable device operation and very high viability of several different encapsulated cell types for prolonged periods. We believe this method offers a paradigm shift in alginate gelling technology for application in microfluidics.
Collapse
Affiliation(s)
- Armend G Håti
- Biophysics and Medical Technology, Dept. of Physics, NTNU, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway.
| | | | | | | | | | | |
Collapse
|
18
|
Kaminski TS, Scheler O, Garstecki P. Droplet microfluidics for microbiology: techniques, applications and challenges. LAB ON A CHIP 2016; 16:2168-87. [PMID: 27212581 DOI: 10.1039/c6lc00367b] [Citation(s) in RCA: 241] [Impact Index Per Article: 30.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Droplet microfluidics has rapidly emerged as one of the key technologies opening up new experimental possibilities in microbiology. The ability to generate, manipulate and monitor droplets carrying single cells or small populations of bacteria in a highly parallel and high throughput manner creates new approaches for solving problems in diagnostics and for research on bacterial evolution. This review presents applications of droplet microfluidics in various fields of microbiology: i) detection and identification of pathogens, ii) antibiotic susceptibility testing, iii) studies of microbial physiology and iv) biotechnological selection and improvement of strains. We also list the challenges in the dynamically developing field and new potential uses of droplets in microbiology.
Collapse
Affiliation(s)
- Tomasz S Kaminski
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland.
| | | | | |
Collapse
|
19
|
Chan HF, Ma S, Leong KW. Can microfluidics address biomanufacturing challenges in drug/gene/cell therapies? Regen Biomater 2016; 3:87-98. [PMID: 27047674 PMCID: PMC4817324 DOI: 10.1093/rb/rbw009] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2016] [Accepted: 01/18/2016] [Indexed: 12/15/2022] Open
Abstract
Translation of any inventions into products requires manufacturing. Development of drug/gene/cell delivery systems will eventually face manufacturing challenges, which require the establishment of standardized processes to produce biologically-relevant products of high quality without incurring prohibitive cost. Microfluidicu technologies present many advantages to improve the quality of drug/gene/cell delivery systems. They also offer the benefits of automation. What remains unclear is whether they can meet the scale-up requirement. In this perspective, we discuss the advantages of microfluidic-assisted synthesis of nanoscale drug/gene delivery systems, formation of microscale drug/cell-encapsulated particles, generation of genetically engineered cells and fabrication of macroscale drug/cell-loaded micro-/nano-fibers. We also highlight the scale-up challenges one would face in adopting microfluidic technologies for the manufacturing of these therapeutic delivery systems.
Collapse
Affiliation(s)
- Hon Fai Chan
- Department of Biomedical Engineering, Department of Systems Biology, Columbia University, New York, NY 10032, USA
| | - Siying Ma
- Department of Biomedical Engineering, Department of Systems Biology, Columbia University, New York, NY 10032, USA
| | - Kam W Leong
- Department of Biomedical Engineering, Department of Systems Biology, Columbia University, New York, NY 10032, USA
| |
Collapse
|
20
|
Balloon Pump with Floating Valves for Portable Liquid Delivery. MICROMACHINES 2016; 7:mi7030039. [PMID: 30407412 PMCID: PMC6189947 DOI: 10.3390/mi7030039] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/24/2015] [Revised: 02/09/2016] [Accepted: 02/22/2016] [Indexed: 11/17/2022]
Abstract
In this paper, we propose a balloon pump with floating valves to control the discharge flow rates of sample solutions. Because the floating valves were made from a photoreactive resin, the shapes of the floating valves could be controlled by employing different exposure patterns without any change in the pump configurations. Owing to the simple preparation process of the pump, we succeeded in changing the discharge flow rates in accordance with the number and length of the floating valves. Because our methods could be used to easily prepare balloon pumps with arbitrary discharge properties, we achieved several microfluidic operations by the integration of the balloon pumps with microfluidic devices. Therefore, we believe that the balloon pump with floating valves will be a useful driving component for portable microfluidic systems.
Collapse
|
21
|
Madrigal JL, Stilhano RS, Siltanen C, Tanaka K, Rezvani SN, Morgan RP, Revzin A, Han SW, Silva EA. Microfluidic generation of alginate microgels for the controlled delivery of lentivectors. J Mater Chem B 2016; 4:6989-6999. [DOI: 10.1039/c6tb02150f] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Microgels fabricated through distinct microfluidic procedures encapsulate and release functioning lentivectors in a controlled manner.
Collapse
Affiliation(s)
| | | | | | - Kimberly Tanaka
- Department of Biomedical Engineering
- University of California
- Davis
- USA
| | - Sabah N. Rezvani
- Department of Biomedical Engineering
- University of California
- Davis
- USA
| | - Ryan P. Morgan
- Department of Biomedical Engineering
- University of California
- Davis
- USA
| | - Alexander Revzin
- Department of Biomedical Engineering
- University of California
- Davis
- USA
| | - Sang W. Han
- Department of Biophysics
- Federal University of São Paulo
- São Paulo
- Brazil
| | - Eduardo A. Silva
- Department of Biomedical Engineering
- University of California
- Davis
- USA
| |
Collapse
|
22
|
Wu F, Ju XJ, He XH, Jiang MY, Wang W, Liu Z, Xie R, He B, Chu LY. A novel synthetic microfiber with controllable size for cell encapsulation and culture. J Mater Chem B 2016; 4:2455-2465. [DOI: 10.1039/c6tb00209a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel synthetic microfiber for cell encapsulation and culture via a rapid and mild crosslinking reaction in microfluidic devices.
Collapse
Affiliation(s)
- Fang Wu
- School of Chemical Engineering
- Sichuan University
- Chengdu
- P. R. China
| | - Xiao-Jie Ju
- School of Chemical Engineering
- Sichuan University
- Chengdu
- P. R. China
- State Key Laboratory of Polymer Materials Engineering
| | - Xiao-Heng He
- School of Chemical Engineering
- Sichuan University
- Chengdu
- P. R. China
| | - Ming-Yue Jiang
- School of Chemical Engineering
- Sichuan University
- Chengdu
- P. R. China
| | - Wei Wang
- School of Chemical Engineering
- Sichuan University
- Chengdu
- P. R. China
| | - Zhuang Liu
- School of Chemical Engineering
- Sichuan University
- Chengdu
- P. R. China
| | - Rui Xie
- School of Chemical Engineering
- Sichuan University
- Chengdu
- P. R. China
| | - Bin He
- National Engineering Research Center for Biomaterials
- Sichuan University
- Chengdu
- P. R. China
| | - Liang-Yin Chu
- School of Chemical Engineering
- Sichuan University
- Chengdu
- P. R. China
- State Key Laboratory of Polymer Materials Engineering
| |
Collapse
|
23
|
Morimoto Y, Hsiao AY, Takeuchi S. Point-, line-, and plane-shaped cellular constructs for 3D tissue assembly. Adv Drug Deliv Rev 2015; 95:29-39. [PMID: 26387835 DOI: 10.1016/j.addr.2015.09.003] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2015] [Revised: 08/18/2015] [Accepted: 09/11/2015] [Indexed: 12/12/2022]
Abstract
Microsized cellular constructs such as cellular aggregates and cell-laden hydrogel blocks are attractive cellular building blocks to reconstruct 3D macroscopic tissues with spatially ordered cells in bottom-up tissue engineering. In this regard, microfluidic techniques are remarkable methods to form microsized cellular constructs with high production rate and control of their shapes such as point, line, and plane. The fundamental shapes of the cellular constructs allow for the fabrication of larger arbitrary-shaped tissues by assembling them. This review introduces microfluidic formation methods of microsized cellular constructs and manipulation techniques to assemble them with control of their arrangements. Additionally, we show applications of the cellular constructs to biological studies and clinical treatments and discuss future trends as their potential applications.
Collapse
|
24
|
Allazetta S, Kolb L, Zerbib S, Bardy J, Lutolf MP. Cell-Instructive Microgels with Tailor-Made Physicochemical Properties. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2015; 11:5647-5656. [PMID: 26349486 DOI: 10.1002/smll.201501001] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2015] [Revised: 06/19/2015] [Indexed: 06/05/2023]
Abstract
A microfluidic in vitro cell encapsulation platform to systematically test the effects of microenvironmental parameters on cell fate in 3D is developed. Multiple cell types including fibroblasts, embryonic stem cells, and cancer cells are incorporated in enzymatically cross-linked poly(ethylene glycol)-based microgels having defined and tunable mechanical and biochemical properties. Furthermore, different approaches to prevent cell "escape" from the microcapsules are explored and shown to substantially enhance the potential of this technology. Finally, coencapsulation of microgels within nondegradable gels allows cell viability, proliferation, and morphology to be studied in different microenvironmental conditions up to two weeks in culture.
Collapse
Affiliation(s)
- Simone Allazetta
- Laboratory of Stem Cell Bioengineering, Institute of Bioengineering, School of Life Sciences and School of Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015, Lausanne, Switzerland
| | - Laura Kolb
- Laboratory of Stem Cell Bioengineering, Institute of Bioengineering, School of Life Sciences and School of Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015, Lausanne, Switzerland
| | - Samantha Zerbib
- Laboratory of Stem Cell Bioengineering, Institute of Bioengineering, School of Life Sciences and School of Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015, Lausanne, Switzerland
| | - Jo'an Bardy
- Laboratory of Stem Cell Bioengineering, Institute of Bioengineering, School of Life Sciences and School of Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015, Lausanne, Switzerland
| | - Matthias P Lutolf
- Laboratory of Stem Cell Bioengineering, Institute of Bioengineering, School of Life Sciences and School of Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015, Lausanne, Switzerland
- Institute of Chemical Sciences and Engineering, School of Basic Science, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015, Lausanne, Switzerland
| |
Collapse
|
25
|
Observation and Manipulation of a Capillary Jet in a Centrifuge-Based Droplet Shooting Device. MICROMACHINES 2015. [DOI: 10.3390/mi6101436] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
26
|
Kim BJ, Richter LV, Hatter N, Tung CK, Ahner BA, Wu M. An array microhabitat system for high throughput studies of microalgal growth under controlled nutrient gradients. LAB ON A CHIP 2015; 15:3687-3694. [PMID: 26248065 DOI: 10.1039/c5lc00727e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Microalgae have been increasingly recognized in the fields of environmental and biomedical engineering because of its use as base materials for biofuels or biomedical products, and also the urgent needs to control harmful algal blooms protecting water resources worldwide. Central to the theme is the growth rate of microalgae under the influences of various environmental cues including nutrients, pH, oxygen tension and light intensity. Current microalgal culture systems, e.g. raceway ponds or chemostats, are not designed for system parameter optimizations of cell growth. In this article, we present the development of an array microfluidic system for high throughput studies of microalgal growth under well defined environmental conditions. The microfluidic platform consists of an array of microhabitats flanked by two parallel side channels, all of which are patterned in a thin agarose gel membrane. The unique feature of the device is that each microhabitat is physically confined suitable for both motile and non-motile cell culture, and at the same time, the device is transparent and can be perfused through the two side channels amendable for precise environmental control of photosynthetic microorganisms. This microfluidic system is used to study the growth kinetics of a model microalgal strain, Chlamydomonas reinhardtii (C. reinhardtii), under ammonium (NH4Cl) concentration gradients. Experimental results show that C. reinhardtii follows Monod growth kinetics with a half-saturation constant of 1.2 ± 0.3 μM. This microfluidic platform provides a fast (~50 fold speed increase), cost effective (less reagents and human intervention) and quantitative technique for microalgal growth studies, in contrast to the current chemostat or batch cell culture system. It can be easily extended to investigate growth kinetics of other microorganisms under either single or co-culture setting.
Collapse
Affiliation(s)
- Beum Jun Kim
- Department of Biological and Environmental Engineering, Cornell University, Ithaca, NY, USA.
| | | | | | | | | | | |
Collapse
|
27
|
Allazetta S, Lutolf MP. Stem cell niche engineering through droplet microfluidics. Curr Opin Biotechnol 2015; 35:86-93. [PMID: 26051090 DOI: 10.1016/j.copbio.2015.05.003] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Revised: 05/12/2015] [Accepted: 05/13/2015] [Indexed: 01/25/2023]
Abstract
Stem cells reside in complex niches in which their behaviour is tightly regulated by various biochemical and biophysical signals. In order to unveil some of the crucial stem cell-niche interactions and expedite the implementation of stem cells in clinical and pharmaceutical applications, in vitro methodologies are being developed to reconstruct key features of stem cell niches. Recently, droplet-based microfluidics has emerged as a promising strategy to build stem cell niche models in a miniaturized and highly precise fashion. This review highlights current advances in using droplet microfluidics in stem cell biology. We also discuss recent efforts in which microgel technology has been interfaced with high-throughput analyses to engender screening paradigms with an unparalleled potential for basic and applied biological studies.
Collapse
Affiliation(s)
- Simone Allazetta
- Laboratory of Stem Cell Bioengineering, Institute of Bioengineering, School of Life Sciences and School of Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Matthias P Lutolf
- Laboratory of Stem Cell Bioengineering, Institute of Bioengineering, School of Life Sciences and School of Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland; Institute of Chemical Sciences and Engineering, School of Basic Sciences, EPFL, Switzerland.
| |
Collapse
|
28
|
Wu F, Wang W, Liu L, Ju XJ, Xie R, Liu Z, Chu LY. Monodisperse hybrid microcapsules with an ultrathin shell of submicron thickness for rapid enzyme reactions. J Mater Chem B 2014; 3:796-803. [PMID: 32262170 DOI: 10.1039/c4tb01803f] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this study, we report a facile approach for the fabrication of monodisperse hybrid alginate/protamine/silica (APSi) microcapsules with an ultrathin shell of submicron thickness as enzyme encapsulation systems for rapid enzymatic reactions. Monodisperse water-in-oil (W/O) emulsions, which have been generated in microfluidics, are used as templates for preparing APSi microcapsules via internal/external gelation and biosilicification. The microcapsules allow highly-efficient encapsulation of model actives bovine serum albumin (∼99%) during the fabrication process. The hybrid shell with an ultrathin thickness of ∼420 nm provides fast mass transfer for the encapsulated model enzyme laccase to undergo rapid reaction. Moreover, this rigid hybrid shell also endows the encapsulated laccase with excellent reusability and storage stability. These ultrathin-shelled APSi microcapsules show great potential as efficient encapsulation systems for enzymes and biomolecules for their rapid reactions, and as delivery systems for actives in biomedical applications.
Collapse
Affiliation(s)
- Fang Wu
- School of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, China.
| | | | | | | | | | | | | |
Collapse
|
29
|
Park JW, Na SC, Nguyen TQ, Paik SM, Kang M, Hong D, Choi IS, Lee JH, Jeon NL. Live cell imaging compatible immobilization of Chlamydomonas reinhardtii in microfluidic platform for biodiesel research. Biotechnol Bioeng 2014; 112:494-501. [PMID: 25220860 DOI: 10.1002/bit.25453] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2014] [Revised: 08/19/2014] [Accepted: 09/05/2014] [Indexed: 11/06/2022]
Abstract
This paper describes a novel surface immobilization method for live-cell imaging of Chlamydomonas reinhardtii for continuous monitoring of lipid droplet accumulation. Microfluidics allows high-throughput manipulation and analysis of single cells in precisely controlled microenvironment. Fluorescence imaging based quantitative measurement of lipid droplet accumulation in microalgae had been difficult due to their intrinsic motile behavior. We present a simple surface immobilization method using gelatin coating as the "biological glue." We take advantage of hydroxyproline (Hyp)-based non-covalent interaction between gelatin and the outer cell wall of microalgae to anchor the cells inside the microfluidic device. We have continuously monitored single microalgal cells for up to 6 days. The immobilized microalgae remain viable (viability was comparable to bulk suspension cultured controls). When exposed to wall shear stress, most of the cells remain attached up to 0.1 dyne/cm(2) . Surface immobilization allowed high-resolution, live-cell imaging of mitotic process in real time-which followed previously reported stages in mitosis of suspension cultured cells. Use of gelatin coated microfluidics devices can result in better methods for microalgae strain screening and culture condition optimization that will help microalgal biodiesel become more economically viable.
Collapse
Affiliation(s)
- Jae Woo Park
- Division of WCU (World Class University) Multiscale Mechanical Design, School of Mechanical and Aerospace Engineering, Seoul National University, Seoul, Korea
| | | | | | | | | | | | | | | | | |
Collapse
|
30
|
Jang J, Seol YJ, Kim HJ, Kundu J, Kim SW, Cho DW. Effects of alginate hydrogel cross-linking density on mechanical and biological behaviors for tissue engineering. J Mech Behav Biomed Mater 2014; 37:69-77. [PMID: 24880568 DOI: 10.1016/j.jmbbm.2014.05.004] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2014] [Revised: 05/01/2014] [Accepted: 05/04/2014] [Indexed: 10/25/2022]
Abstract
An effective cross-linking of alginate gel was made through reaction with calcium carbonate (CaCO3). We used human chondrocytes as a model cell to study the effects of cross-linking density. Three different pore size ranges of cross-linked alginate hydrogels were fabricated. The morphological, mechanical, and rheological properties of various alginate hydrogels were characterized and responses of biosynthesis of cells encapsulated in each gel to the variation in cross-linking density were investigated. Desired outer shape of structure was maintained when the alginate solution was cross-linked with the applied method. The properties of alginate hydrogel could be tailored through applying various concentrations of CaCO3. The rate of synthesized GAGs and collagens was significantly higher in human chondrocytes encapsulated in the smaller pore structure than that in the larger pore structure. The expression of chondrogenic markers, including collagen type II and aggrecan, was enhanced in the smaller pore structure. It was found that proper structural morphology is a critical factor to enhance the performance and tissue regeneration.
Collapse
Affiliation(s)
- Jinah Jang
- Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology (POSTECH), San 31, Hyoja-dong, Nam-gu, Pohang, Kyungbuk, 790-784, South Korea.
| | - Young-Joon Seol
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), San 31, Hyoja-dong, Nam-gu, Pohang, Kyungbuk, 790-784, South Korea.
| | - Hyeon Ji Kim
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), San 31, Hyoja-dong, Nam-gu, Pohang, Kyungbuk, 790-784, South Korea.
| | - Joydip Kundu
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), San 31, Hyoja-dong, Nam-gu, Pohang, Kyungbuk, 790-784, South Korea.
| | - Sung Won Kim
- Department of Otolaryngology-Head and Neck Surgery, The Catholic University of Korea, 222 Banpo-daero, Seocho-gu, Seoul 137-701, South Korea; Department of Biomedical Science, College of Medicine, The Catholic University of Korea, 222 Banpo-daero, Seocho-gu, Seoul 137-701, South Korea.
| | - Dong-Woo Cho
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), San 31, Hyoja-dong, Nam-gu, Pohang, Kyungbuk, 790-784, South Korea.
| |
Collapse
|
31
|
Eu YJ, Park HS, Kim DP, Wook Hong J. A microfluidic perfusion platform for cultivation and screening study of motile microalgal cells. BIOMICROFLUIDICS 2014; 8:024113. [PMID: 24803962 PMCID: PMC4000397 DOI: 10.1063/1.4871522] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2013] [Accepted: 04/05/2014] [Indexed: 05/12/2023]
Abstract
Systematic screening of algal cells is getting huge interest due to their capability of producing lipid-based biodiesel. Here, we introduce a new microfluidic platform composed of an array of perfusion chambers designed for long-term cultivation and preliminary screening of motile microalgal cells through loading and releasing of cells to and from the chambers. The chemical environment in each perfusion chamber was independently controlled for 5 days. The effect of nitrogen-depletion on the lipid production, phototaxis behavior in the absence of Ca(2+), and cytotoxic effect of herbicide on microalgal cells was successfully monitored and compared with simultaneous control experiments on the platform. The present methodology could be extended to effective screening of algal cells and various cell lines for the production of biodiesel and other useful chemicals.
Collapse
Affiliation(s)
- Young-Jae Eu
- Department of Fine Chemical Engineering and Applied Chemistry, Chungnam National University, Daejeon 305-764, South Korea ; National Center of Applied Microfluidic Chemistry, Department of Chemical Engineering, Pohang University of Science and Technology, Pohang, Gyungbuk 790-784, South Korea
| | - Hye-Sun Park
- Department of Fine Chemical Engineering and Applied Chemistry, Chungnam National University, Daejeon 305-764, South Korea ; National Center of Applied Microfluidic Chemistry, Department of Chemical Engineering, Pohang University of Science and Technology, Pohang, Gyungbuk 790-784, South Korea
| | - Dong-Pyo Kim
- National Center of Applied Microfluidic Chemistry, Department of Chemical Engineering, Pohang University of Science and Technology, Pohang, Gyungbuk 790-784, South Korea
| | - Jong Wook Hong
- Materials Research and Education Center, Department of Mechanical Engineering, Auburn University, Auburn, Alabama 36830, USA ; Department of Bionano Engineering, Hanyang University, Ansan 427-791, South Korea
| |
Collapse
|
32
|
Kang A, Park J, Ju J, Jeong GS, Lee SH. Cell encapsulation via microtechnologies. Biomaterials 2014; 35:2651-63. [PMID: 24439405 DOI: 10.1016/j.biomaterials.2013.12.073] [Citation(s) in RCA: 147] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2013] [Accepted: 12/20/2013] [Indexed: 01/01/2023]
Abstract
The encapsulation of living cells in a variety of soft polymers or hydrogels is important, particularly, for the rehabilitation of functional tissues capable of repairing or replacing damaged organs. Cellular encapsulation segregates cells from the surrounding tissue to protect the implanted cell from the recipient's immune system after transplantation. Diverse hydrogel membranes have been popularly used as encapsulating materials and permit the diffusion of gas, nutrients, wastes and therapeutic products smoothly. This review describes a variety of methods that have been developed to achieve cellular encapsulation using microscale platform. Microtechnologies have been adopted to precisely control the encapsulated cell number, size and shape of a cell-laden polymer structure. We provide a brief overview of recent microtechnology-based cell encapsulation methods, with a detailed description of the relevant processes. Finally, we discuss the current challenges and future directions likely to be taken by cell microencapsulation approaches toward tissue engineering and cell therapy applications.
Collapse
Affiliation(s)
- AhRan Kang
- Biotechnology-Medical Science, KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 136-701, Republic of Korea
| | - JiSoo Park
- Biotechnology-Medical Science, KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 136-701, Republic of Korea
| | - Jongil Ju
- Department of Biomedical Engineering, College of Health Science, Korea University, Seoul 136-703, Republic of Korea
| | - Gi Seok Jeong
- Department of Biomedical Engineering, College of Health Science, Korea University, Seoul 136-703, Republic of Korea
| | - Sang-Hoon Lee
- Biotechnology-Medical Science, KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 136-701, Republic of Korea; Department of Biomedical Engineering, College of Health Science, Korea University, Seoul 136-703, Republic of Korea.
| |
Collapse
|
33
|
Mazzitelli S, Capretto L, Quinci F, Piva R, Nastruzzi C. Preparation of cell-encapsulation devices in confined microenvironment. Adv Drug Deliv Rev 2013; 65:1533-55. [PMID: 23933618 DOI: 10.1016/j.addr.2013.07.021] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2013] [Revised: 07/18/2013] [Accepted: 07/31/2013] [Indexed: 02/07/2023]
Abstract
The entrapment of cells into hydrogel microdevice in form of microparticles or microfibers is one of the most appealing and useful tools for cell-based therapy and tissue engineering. Cell encapsulation procedures allow the immunoisolation of cells from the surrounding environment, after their transplantation and the maintenance of the normal cellular physiology. Factors affecting the efficacy of microdevices, which include size, size distribution, morphology, and porosity are all highly dependent on the method of preparation. In this respect, microfluidic based methods offer a promising strategy to fabricate highly uniform and morphologically controlled microdevices with tunable chemical and mechanical properties. In the current review, various cell microencapsulation procedures, based on a microfluidics, are critically analyzed with a special focus on the effect of the procedure on the morphology, viability and functions of the embedded cells. Moreover, a brief introduction about the optimal characteristics of microdevice intended for cell encapsulation, together with the currently used materials for the production is reported. A further challenging application of microfluidics for the development of "living microchip" is also presented. Finally, the limitations, challenging and future work on the microfluidic approach are also discussed.
Collapse
Affiliation(s)
- Stefania Mazzitelli
- Department of Life Sciences and Biotechnology, University of Ferrara, Via F. Mortara 17/19, Ferrara 44121, Italy.
| | | | | | | | | |
Collapse
|
34
|
Vladisavljević GT, Khalid N, Neves MA, Kuroiwa T, Nakajima M, Uemura K, Ichikawa S, Kobayashi I. Industrial lab-on-a-chip: design, applications and scale-up for drug discovery and delivery. Adv Drug Deliv Rev 2013; 65:1626-63. [PMID: 23899864 DOI: 10.1016/j.addr.2013.07.017] [Citation(s) in RCA: 152] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2013] [Revised: 07/16/2013] [Accepted: 07/18/2013] [Indexed: 01/09/2023]
Abstract
Microfluidics is an emerging and promising interdisciplinary technology which offers powerful platforms for precise production of novel functional materials (e.g., emulsion droplets, microcapsules, and nanoparticles as drug delivery vehicles- and drug molecules) as well as high-throughput analyses (e.g., bioassays, detection, and diagnostics). In particular, multiphase microfluidics is a rapidly growing technology and has beneficial applications in various fields including biomedicals, chemicals, and foods. In this review, we first describe the fundamentals and latest developments in multiphase microfluidics for producing biocompatible materials that are precisely controlled in size, shape, internal morphology and composition. We next describe some microfluidic applications that synthesize drug molecules, handle biological substances and biological units, and imitate biological organs. We also highlight and discuss design, applications and scale up of droplet- and flow-based microfluidic devices used for drug discovery and delivery.
Collapse
|
35
|
Lee DH, Bae CY, Han JI, Park JK. In Situ Analysis of Heterogeneity in the Lipid Content of Single Green Microalgae in Alginate Hydrogel Microcapsules. Anal Chem 2013; 85:8749-56. [DOI: 10.1021/ac401836j] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Do-Hyun Lee
- Department of Bio and Brain Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro,
Yuseong-gu, Daejeon 305-701, Republic of Korea
| | - Chae Yun Bae
- Department of Bio and Brain Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro,
Yuseong-gu, Daejeon 305-701, Republic of Korea
| | - Jong-In Han
- Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro,
Yuseong-gu, Daejeon 305-701, Republic of Korea
| | - Je-Kyun Park
- Department of Bio and Brain Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro,
Yuseong-gu, Daejeon 305-701, Republic of Korea
- KAIST Institute
for the NanoCentury, 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, Republic of Korea
| |
Collapse
|
36
|
Das T, Meunier L, Barbe L, Provencher D, Guenat O, Gervais T, Mes-Masson AM. Empirical chemosensitivity testing in a spheroid model of ovarian cancer using a microfluidics-based multiplex platform. BIOMICROFLUIDICS 2013; 7:11805. [PMID: 24403987 PMCID: PMC3555942 DOI: 10.1063/1.4774309] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2012] [Accepted: 10/18/2012] [Indexed: 05/11/2023]
Abstract
The use of biomarkers to infer drug response in patients is being actively pursued, yet significant challenges with this approach, including the complicated interconnection of pathways, have limited its application. Direct empirical testing of tumor sensitivity would arguably provide a more reliable predictive value, although it has garnered little attention largely due to the technical difficulties associated with this approach. We hypothesize that the application of recently developed microtechnologies, coupled to more complex 3-dimensional cell cultures, could provide a model to address some of these issues. As a proof of concept, we developed a microfluidic device where spheroids of the serous epithelial ovarian cancer cell line TOV112D are entrapped and assayed for their chemoresponse to carboplatin and paclitaxel, two therapeutic agents routinely used for the treatment of ovarian cancer. In order to index the chemoresponse, we analyzed the spatiotemporal evolution of the mortality fraction, as judged by vital dyes and confocal microscopy, within spheroids subjected to different drug concentrations and treatment durations inside the microfluidic device. To reflect microenvironment effects, we tested the effect of exogenous extracellular matrix and serum supplementation during spheroid formation on their chemotherapeutic response. Spheroids displayed augmented chemoresistance in comparison to monolayer culturing. This resistance was further increased by the simultaneous presence of both extracellular matrix and high serum concentration during spheroid formation. Following exposure to chemotherapeutics, cell death profiles were not uniform throughout the spheroid. The highest cell death fraction was found at the center of the spheroid and the lowest at the periphery. Collectively, the results demonstrate the validity of the approach, and provide the basis for further investigation of chemotherapeutic responses in ovarian cancer using microfluidics technology. In the future, such microdevices could provide the framework to assay drug sensitivity in a timeframe suitable for clinical decision making.
Collapse
Affiliation(s)
- Tamal Das
- Centre de recherche du Centre hospitalier de l'Université de Montréal and Institut du cancer de Montréal, Montréal, Québec H2L 4M1, Canada
| | - Liliane Meunier
- Centre de recherche du Centre hospitalier de l'Université de Montréal and Institut du cancer de Montréal, Montréal, Québec H2L 4M1, Canada
| | - Laurent Barbe
- Centre Suisse d' Electronique et de Microtechnique, CH-7302 Landquart, Switzerland
| | - Diane Provencher
- Centre de recherche du Centre hospitalier de l'Université de Montréal and Institut du cancer de Montréal, Montréal, Québec H2L 4M1, Canada ; Division of Gynecologic Oncology, Université de Montréal, Montréal, Québec H2L 4M1, Canada
| | - Olivier Guenat
- ARTORG Center, University of Bern, CH-3010 Bern, Switzerland
| | - Thomas Gervais
- Department of Engineering Physics, École Polytechnique de Montréal, Montréal, Québec H3T 1J4, Canada
| | - Anne-Marie Mes-Masson
- Centre de recherche du Centre hospitalier de l'Université de Montréal and Institut du cancer de Montréal, Montréal, Québec H2L 4M1, Canada ; Département de médecine, Université de Montréal, Montréal, Québec H3T 1J4, Canada
| |
Collapse
|
37
|
Akamatsu K, Ikeuchi Y, Nakao A, Nakao SI. Size-controlled and monodisperse enzyme-encapsulated chitosan microspheres developed by the SPG membrane emulsification technique. J Colloid Interface Sci 2012; 371:46-51. [DOI: 10.1016/j.jcis.2011.12.078] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2011] [Revised: 12/29/2011] [Accepted: 12/30/2011] [Indexed: 10/14/2022]
|
38
|
Chen W, Lisowski M, Khalil G, Sweet IR, Shen AQ. Microencapsulated 3-dimensional sensor for the measurement of oxygen in single isolated pancreatic islets. PLoS One 2012; 7:e33070. [PMID: 22479359 PMCID: PMC3315556 DOI: 10.1371/journal.pone.0033070] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2011] [Accepted: 02/03/2012] [Indexed: 01/25/2023] Open
Abstract
BACKGROUND Oxygen consumption reflects multiple processes in pancreatic islets including mechanisms contributing to insulin secretion, oxidative stress and viability, providing an important readout in studies of islet function, islet viability and drug testing. Due to the scarcity, heterogeneity, and intrinsic kinetic properties of individual islets, it would be of great benefit to detect oxygen consumption by single islets. We present a novel method we have developed to image oxygen in single islets. METHODOLOGY/PRINCIPAL FINDINGS Using a microfluidics system, individual islets and a fluorescent oxygen-sensitive dye were encased within a thin alginate polymer layer. Insulin secretion by the encapsulated islets was normal. Fluorescent signal from the encased dye, detected using a standard inverted fluorescence microscope and digital camera, was stable and proportional to the amount of oxygen in the media. When integrated into a perifusion system, the sensing system detected changes in response to metabolic substrates, mitochondrial poisons, and induced-oscillations. Glucose responses averaged 30.1±7.1% of the response to a metabolic inhibitor (cyanide), increases were observed in all cases (n = 6), and the system was able to resolve changes in oxygen consumption that had a period greater than 0.5 minutes. The sensing system operated similarly from 2-48 hours following encapsulation, and viability and function of the islets were not significantly affected by the encapsulation process. CONCLUSIONS/SIGNIFICANCE An oxygen-dependent dye situated around and within a pancreatic islet encapsulated by a thin layer of alginate was sensitive to changes in oxygen consumption, and was not harmful to the function or viability of islets over the course of two days. The microcapsule-based sensing method is particularly suited to assessing the effects of compounds (dose responses and time courses) and chronic changes occurring over the course of days. The approach should be applicable to other cell types and dyes sensitive to other biologically important molecules.
Collapse
Affiliation(s)
- Wanyu Chen
- Department of Mechanical Engineering, University of Washington, Seattle, Washington, United States of America
- School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, China
| | - Mark Lisowski
- Department of Medicine, University of Washington, Seattle, Washington, United States of America
| | - Gamal Khalil
- Department of Aeronautics and Astronautics Department, University of Washington, Seattle, Washington, Unites States of America
| | - Ian R. Sweet
- Department of Medicine, University of Washington, Seattle, Washington, United States of America
| | - Amy Q. Shen
- Department of Mechanical Engineering, University of Washington, Seattle, Washington, United States of America
| |
Collapse
|
39
|
Aikawa T, Konno T, Takai M, Ishihara K. Spherical phospholipid polymer hydrogels for cell encapsulation prepared with a flow-focusing microfluidic channel device. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:2145-50. [PMID: 22176809 DOI: 10.1021/la2037586] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
To prepare spherical polymer hydrogels, we used a flow-focusing microfluidic channel device for mixing aqueous solutions of two water-soluble polymers. Continuous encapsulation of cells in the hydrogels was also examined. The polymers were bioinspired 2-methacryloyloxyethyl phosphorylcholine polymer bearing phenyl boronic acid groups (PMBV) and poly(vinyl alcohol) (PVA), which spontaneously form a hydrogel in aqueous medium via specific molecular complexation upon mixing, even when they were in cell culture medium. The microfluidic device was prepared with polydimethylsiloxan, and the surface of the channel was treated with fluoroalkyl compound to prevent sticking of the polymers on the surface. The microfluidic channel process could control the diameter of the spherical hydrogels in the range of 30-90 μm and generated highly monodispersed diameter spherical hydrogels. We found that the polymer distribution in the hydrogel was influenced by the PVA concentration and that the hydrogel could be dissociated by the addition of d-sorbitol to the suspension. The single cells could be encapsulated and remain viable in the hydrogels. The localized distribution of polymers in the hydrogel may provide an environment for modulating cell function. It is concluded that the spontaneous hydrogel formation between PMBV and PVA in the flow-focusing microfluidic channel device is applicable for continuous preparation of a spherical hydrogel-encapsulating living cell.
Collapse
Affiliation(s)
- Tatsuo Aikawa
- Department of Materials Engineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Tokyo 113-8656, Japan
| | | | | | | |
Collapse
|
40
|
Deng Y, Zhang N, Zhao L, Yu X, Ji X, Liu W, Guo S, Liu K, Zhao XZ. Rapid purification of cell encapsulated hydrogel beads from oil phase to aqueous phase in a microfluidic device. LAB ON A CHIP 2011; 11:4117-21. [PMID: 22012540 DOI: 10.1039/c1lc20494g] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
In this paper, we demonstrate a new type of microfluidic chip that can realize continuous-flow purification of hydrogel beads from a carrier oil into aqueous solution by using a laminar-like oil/water interface. The microfluidic chip is composed by two functional components: (1) a flow-focusing bead generation module that can control size and shape of beads, (2) a bead extraction module capable of purifying hydrogel beads from oil into aqueous solution. This module is featured with large branch channels on one side and small ones on the opposite side. Water is continuously infused into the bead extraction module through the large branch channels, resulting in a laminar-like oil/water interface between the branch junctions. Simulation and experimental data show that the efficiency of oil depletion is determined by the relative flow rates between infused water and carrier oil. By using such a microfluidic device, viable cells (HCT116, colon cancer cell line) can be encapsulated in the hydrogel beads and purified into a cell culture media. Significantly improved cell viability was achieved compared to that observed by conventional bead purification approaches. This facile microfluidic chip could be a promising candidate for sample treatment in lab-on-a-chip applications.
Collapse
Affiliation(s)
- Yuliang Deng
- Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan, P R China
| | | | | | | | | | | | | | | | | |
Collapse
|
41
|
Ogończyk D, Siek M, Garstecki P. Microfluidic formulation of pectin microbeads for encapsulation and controlled release of nanoparticles. BIOMICROFLUIDICS 2011; 5:13405. [PMID: 21522495 PMCID: PMC3082342 DOI: 10.1063/1.3569944] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2010] [Accepted: 02/17/2011] [Indexed: 05/06/2023]
Abstract
We report a method for formulation of pectin microbeads using microfluidics. The technique uses biocompatible ingredients and allows for controlled external gelation with hydrogen and calcium ions delivered from an organic phase of rapeseed oil. This method allows for encapsulation of nanoparticles into the microparticles of gel and for control of the rate of their release.
Collapse
Affiliation(s)
- D Ogończyk
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | | | | |
Collapse
|
42
|
Matsunaga YT, Morimoto Y, Takeuchi S. Molding cell beads for rapid construction of macroscopic 3D tissue architecture. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2011; 23:H90-4. [PMID: 21360782 DOI: 10.1002/adma.201004375] [Citation(s) in RCA: 204] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2010] [Indexed: 05/18/2023]
Affiliation(s)
- Yukiko T Matsunaga
- Institute of Industrial Science, The University of Tokyo, Komaba, Meguro-ku, Japan
| | | | | |
Collapse
|
43
|
Eun YJ, Utada A, Copeland MF, Takeuchi S, Weibel DB. Encapsulating bacteria in agarose microparticles using microfluidics for high-throughput cell analysis and isolation. ACS Chem Biol 2011; 6:260-6. [PMID: 21142208 PMCID: PMC3060957 DOI: 10.1021/cb100336p] [Citation(s) in RCA: 144] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The high-throughput analysis and isolation of bacterial cells encapsulated in agarose microparticles using fluorescence-activated cell sorting (FACS) is described. Flow-focusing microfluidic systems were used to create monodisperse microparticles that were ∼30 μm in diameter. The dimensions of these particles made them compatible with flow cytometry and FACS, and the sensitivity of these techniques reduced the incubation time for cell replication before analyses were carried out. The small volume of the microparticles (∼1-50 pL) minimized the quantity of reagents needed for bacterial studies. This platform made it possible to screen and isolate bacteria and apply a combination of techniques to rapidly determine the target of biologically active small molecules. As a pilot study, Escherichia coli cells were encapsulated in agarose microparticles, incubated in the presence of varying concentrations of rifampicin, and analyzed using FACS. The minimum inhibitory concentration of rifampicin was determined, and spontaneous mutants that had developed resistance to the antibiotic were isolated via FACS and characterized by DNA sequencing. The β-subunit of RNA polymerase, RpoB, was confirmed as the target of rifampicin, and Q513L was the mutation most frequently observed. Using this approach, the time and quantity of antibiotics required for the isolation of mutants was reduced by 8- and 150-fold, respectively, compared to conventional microbiological techniques using nutrient agar plates. We envision that this technique will have an important impact on research in chemical biology, natural products chemistry, and the discovery and characterization of biologically active secondary metabolites.
Collapse
Affiliation(s)
- Ye-Jin Eun
- Department of Biochemistry, University of Wisconsin-Madison, Madison, WI, USA
| | - Andrew Utada
- Institute of Industrial Science, University of Tokyo, Tokyo, Japan
| | - Matthew F. Copeland
- Department of Biochemistry, University of Wisconsin-Madison, Madison, WI, USA
| | - Shoji Takeuchi
- Institute of Industrial Science, University of Tokyo, Tokyo, Japan
| | - Douglas B. Weibel
- Department of Biochemistry, University of Wisconsin-Madison, Madison, WI, USA
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI, USA
| |
Collapse
|
44
|
Salieb-Beugelaar GB, Simone G, Arora A, Philippi A, Manz A. Latest developments in microfluidic cell biology and analysis systems. Anal Chem 2010; 82:4848-64. [PMID: 20462184 DOI: 10.1021/ac1009707] [Citation(s) in RCA: 174] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
|
45
|
Teshima T, Ishihara H, Iwai K, Adachi A, Takeuchi S. A dynamic microarray device for paired bead-based analysis. LAB ON A CHIP 2010; 10:2443-8. [PMID: 20697655 DOI: 10.1039/c004986g] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
In this study, we have developed a meander-shaped dynamic microfluidic technology that allows us to pair two different types of microbeads in a trapping site. The dynamic microfluidic technology comprises implemented modifications of a conventional dynamic microarray design such as: (i) the combination of a meander-shaped by-pass channel and a trapping channel with a hydrodynamic trapping site and (ii) line-symmetrical formation of the by-pass and trapping channels. Using these modifications, we have successfully trapped different types of sample in one trapping site, and constructed an array of paired beads of different type such as polystyrene beads or hydrogel beads made of agarose, collagen or alginate. We found that this meander-shaped dynamic microfluidic technology is applicable for the observation of interactions between the paired beads such as molecular diffusion.
Collapse
Affiliation(s)
- Tetsuhiko Teshima
- Institute of Industrial Science, The University of Tokyo, Meguro-ku, Japan
| | | | | | | | | |
Collapse
|
46
|
Abstract
We present the construction and operation of a microfluidic nozzle created using several standard fluidic parts available commercially. By elegantly combining several pieces from a standard assembly, a capillary and a few other standard parts, we were able to develop a novel device. Using this device, precise axisymmetric flow focusing of particles was achieved and observed at the exit of the nozzle and within a connected microfluidic device several centimetres away. Sheath and core flow rates were varied to show influence and control over the width of the focused particles.
Collapse
Affiliation(s)
- Alex Terray
- Naval Research Laboratory, Chemistry Division, Bio/Analytical Chemistry, Code 6112, 4555 Overlook Ave. S.W., Washington, DC 20375, USA
| | | |
Collapse
|
47
|
Tsuda Y, Morimoto Y, Takeuchi S. Monodisperse cell-encapsulating peptide microgel beads for 3D cell culture. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:2645-9. [PMID: 19845343 DOI: 10.1021/la902827y] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
This paper describes a method to produce monodisperse cell-encapsulating microgel beads composed of a self-assembling peptide gel for three-dimensional (3D) cell culture. We used a 3D microfluidic axisymmetric flow-focusing device with an external gelation method. The finely powdered salts were dispersed into a continuous phase, and the salts induced the gelation when in contact with the peptide solution. Over 93% of the cells survived after the encapsulation, and the cells migrated and grew within the gels. Applications of our cell-encapsulating beads include bead-based cell assays in drug testing and engineering tissue constructs.
Collapse
Affiliation(s)
- Yukiko Tsuda
- Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8505, Japan
| | | | | |
Collapse
|