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Lee S, Ahn J, Kim SM, Kim D, Yeom J, Kim J, Park JY, Ryu BY. Fluid dynamic design for mitigating undesired cell effects and its application to testis cell response testing to endocrine disruptors. J Biol Eng 2023; 17:51. [PMID: 37550751 PMCID: PMC10408176 DOI: 10.1186/s13036-023-00369-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Accepted: 07/16/2023] [Indexed: 08/09/2023] Open
Abstract
Microfluidic devices have emerged as powerful tools for cell-based experiments, offering a controlled microenvironment that mimic the conditions within the body. Numerous cell experiment studies have successfully utilized microfluidic channels to achieve various new scientific discoveries. However, it has been often overlooked that undesired and unnoticed propagation of cellular molecules in such bio-microfluidic channel systems can have a negative impact on the experimental results. Thus, more careful designing is required to minimize such unwanted issues through deeper understanding and careful control of chemically and physically predominant factors at the microscopic scale. In this paper, we introduce a new approach to improve microfluidic channel design, specifically targeting the mitigation of the aforementioned challenges. To minimize the occurrence of undesired cell positioning upstream from the main test section where a concentration gradient field locates, an additional narrow port structure was devised between the microfluidic upstream channel and each inlet reservoir. This port also functioned as a passive lock that hold the flow at rest via fluid-air surface tension, which facilitated manual movement of the device even when cell attachment was not achieved completely. To demonstrate the practicability of the system, we conducted experiments and diffusion simulations on the effect of endocrine disruptors on germ cells. To this end, a bisphenol-A (BPA) concentration gradient was generated in the main channel of the system at BPA concentrations ranging from 120.8 μM to 79.3 μM, and the proliferation of GC-1 cells in the BPA gradient environment was quantitatively evaluated. The features and concepts of the introduced design is to minimize unexpected and ignored error sources, which will be one of the issues to be considered in the development of microfluidic systems to explore extremely delicate cellular phenomena.
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Affiliation(s)
- Seungjin Lee
- School of Mechanical Engineering, College of Engineering, Chung-Ang University, Seoul, 06974, Republic of Korea
| | - Jinseop Ahn
- Present address: Columbia Center for Translational Immunology, Department of Medicine, Columbia University Irving Medical Center, New York, NY, 10032, USA
- Department of Animal Science and Technology, BET Research Institute, Chung-Ang University, Anseong, 17546, Republic of Korea
| | - Seok-Man Kim
- Department of Animal Science and Technology, BET Research Institute, Chung-Ang University, Anseong, 17546, Republic of Korea
| | - Daehan Kim
- School of Mechanical Engineering, College of Engineering, Chung-Ang University, Seoul, 06974, Republic of Korea
| | - Jiun Yeom
- School of Mechanical Engineering, College of Engineering, Chung-Ang University, Seoul, 06974, Republic of Korea
| | - Jeongmok Kim
- School of Mechanical Engineering, College of Engineering, Chung-Ang University, Seoul, 06974, Republic of Korea
| | - Joong Yull Park
- School of Mechanical Engineering, College of Engineering, Chung-Ang University, Seoul, 06974, Republic of Korea.
- Department of Intelligent Energy and Industry, Graduate School, Chung-Ang University, Seoul, 06974, Republic of Korea.
| | - Buom-Yong Ryu
- Department of Animal Science and Technology, BET Research Institute, Chung-Ang University, Anseong, 17546, Republic of Korea.
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Liu Z, Wan X, Wang ZL, Li L. Electroactive Biomaterials and Systems for Cell Fate Determination and Tissue Regeneration: Design and Applications. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2007429. [PMID: 34117803 DOI: 10.1002/adma.202007429] [Citation(s) in RCA: 112] [Impact Index Per Article: 37.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 12/19/2020] [Indexed: 06/12/2023]
Abstract
During natural tissue regeneration, tissue microenvironment and stem cell niche including cell-cell interaction, soluble factors, and extracellular matrix (ECM) provide a train of biochemical and biophysical cues for modulation of cell behaviors and tissue functions. Design of functional biomaterials to mimic the tissue/cell microenvironment have great potentials for tissue regeneration applications. Recently, electroactive biomaterials have drawn increasing attentions not only as scaffolds for cell adhesion and structural support, but also as modulators to regulate cell/tissue behaviors and function, especially for electrically excitable cells and tissues. More importantly, electrostimulation can further modulate a myriad of biological processes, from cell cycle, migration, proliferation and differentiation to neural conduction, muscle contraction, embryogenesis, and tissue regeneration. In this review, endogenous bioelectricity and piezoelectricity are introduced. Then, design rationale of electroactive biomaterials is discussed for imitating dynamic cell microenvironment, as well as their mediated electrostimulation and the applying pathways. Recent advances in electroactive biomaterials are systematically overviewed for modulation of stem cell fate and tissue regeneration, mainly including nerve regeneration, bone tissue engineering, and cardiac tissue engineering. Finally, the significance for simulating the native tissue microenvironment is emphasized and the open challenges and future perspectives of electroactive biomaterials are concluded.
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Affiliation(s)
- Zhirong Liu
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 100083, P. R. China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Xingyi Wan
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 100083, P. R. China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Zhong Lin Wang
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 100083, P. R. China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332-0245, USA
| | - Linlin Li
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 100083, P. R. China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
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3
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Roveimiab Z, Lin F, Anderson JE. Traction and attraction: haptotaxis substrates collagen and fibronectin interact with chemotaxis by HGF to regulate myoblast migration in a microfluidic device. Am J Physiol Cell Physiol 2020; 319:C75-C92. [PMID: 32348173 DOI: 10.1152/ajpcell.00417.2019] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Cell migration is central to development, wound healing, tissue regeneration, and immunity. Despite extensive knowledge of muscle regeneration, myoblast migration during regeneration is not well understood. C2C12 mouse myoblast migration and morphology were investigated using a triple-docking polydimethylsiloxane-based microfluidic device in which cells moved under gravity-driven laminar flow on uniform (=) collagen (CN=), fibronectin (FN=), or opposing gradients (CN-FN or FN-CN). In haptotaxis experiments, migration was faster on FN= than on CN=. At 10 h, cells were more elongated on FN-CN and migration was faster than on the CN-FN substrate. Net migration distance on FN-CN at 10 h was greater than on CN-FN, as cells rapidly entered the channel as a larger population (bulk-cell movement, wave 1). Hepatocyte growth factor (HGF) stimulated rapid chemotaxis on FN= but not CN=, increasing migration speed at 10 h early in the channel at low HGF in a steep HGF gradient. HGF accelerated migration on FN= and bulk-cell movement on both uniform substrates. An HGF gradient also slowed cells in wave 2 moving on FN-CN, not CN-FN. Both opposing-gradient substrates affected the shape, speed, and net distance of migrating cells. Gradient and uniform configurations of HGF and substrate differentially influenced migration behavior. Therefore, haptotaxis substrate configuration potently modifies myoblast chemotaxis by HGF. Innovative microfluidic experiments advance our understanding of intricate complexities of myoblast migration. Findings can be leveraged to engineer muscle-tissue volumes for transplantation after serious injury. New analytical approaches may generate broader insights into cell migration.
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Affiliation(s)
- Ziba Roveimiab
- Department of Biological Sciences, University of Manitoba, Winnipeg, Manitoba, Canada.,Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Francis Lin
- Department of Biological Sciences, University of Manitoba, Winnipeg, Manitoba, Canada.,Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Judy E Anderson
- Department of Biological Sciences, University of Manitoba, Winnipeg, Manitoba, Canada
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Dou J, Mao S, Li H, Lin JM. Combination Stiffness Gradient with Chemical Stimulation Directs Glioma Cell Migration on a Microfluidic Chip. Anal Chem 2019; 92:892-898. [DOI: 10.1021/acs.analchem.9b03681] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Jinxin Dou
- Beijing Key Laboratory of Microanalytical Methods and Instrumentation, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Sifeng Mao
- Beijing Key Laboratory of Microanalytical Methods and Instrumentation, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Haifang Li
- Beijing Key Laboratory of Microanalytical Methods and Instrumentation, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Jin-Ming Lin
- Beijing Key Laboratory of Microanalytical Methods and Instrumentation, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Tsinghua University, Beijing 100084, China
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Panina YA, Yakimov AS, Komleva YK, Morgun AV, Lopatina OL, Malinovskaya NA, Shuvaev AN, Salmin VV, Taranushenko TE, Salmina AB. Plasticity of Adipose Tissue-Derived Stem Cells and Regulation of Angiogenesis. Front Physiol 2018; 9:1656. [PMID: 30534080 PMCID: PMC6275221 DOI: 10.3389/fphys.2018.01656] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2018] [Accepted: 11/02/2018] [Indexed: 12/11/2022] Open
Abstract
Adipose tissue is recognized as an important organ with metabolic, regulatory, and plastic roles. Adipose tissue-derived stem cells (ASCs) with self-renewal properties localize in the stromal vascular fraction (SVF) being present in a vascular niche, thereby, contributing to local regulation of angiogenesis and vessel remodeling. In the past decades, ASCs have attracted much attention from biologists and bioengineers, particularly, because of their multilineage differentiation potential, strong proliferation, and migration abilities in vitro and high resistance to oxidative stress and senescence. Current data suggest that the SVF serves as an important source of endothelial progenitors, endothelial cells, and pericytes, thereby, contributing to vessel remodeling and growth. In addition, ASCs demonstrate intriguing metabolic and interlineage plasticity, which makes them good candidates for creating regenerative therapeutic protocols, in vitro tissue models and microphysiological systems, and tissue-on-chip devices for diagnostic and regeneration-supporting purposes. This review covers recent achievements in understanding the metabolic activity within the SVF niches (lactate and NAD+ metabolism), which is critical for maintaining the pool of ASCs, and discloses their pro-angiogenic potential, particularly, in the complex therapy of cardiovascular and cerebrovascular diseases.
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Affiliation(s)
- Yulia A Panina
- Department of Biochemistry, Medical, Pharmaceutical and Toxicological Chemistry, Krasnoyarsk State Medical University named after Prof. V.F. Voino-Yasenetsky, Krasnoyarsk, Russia
| | - Anton S Yakimov
- Research Institute of Molecular Medicine and Pathobiochemistry, Krasnoyarsk State Medical University named after Prof. V.F. Voino-Yasenetsky, Krasnoyarsk, Russia
| | - Yulia K Komleva
- Department of Biochemistry, Medical, Pharmaceutical and Toxicological Chemistry, Krasnoyarsk State Medical University named after Prof. V.F. Voino-Yasenetsky, Krasnoyarsk, Russia.,Research Institute of Molecular Medicine and Pathobiochemistry, Krasnoyarsk State Medical University named after Prof. V.F. Voino-Yasenetsky, Krasnoyarsk, Russia
| | - Andrey V Morgun
- Department of Pediatrics, Krasnoyarsk State Medical University named after Prof. V.F. Voino-Yasenetsky, Krasnoyarsk, Russia
| | - Olga L Lopatina
- Department of Biochemistry, Medical, Pharmaceutical and Toxicological Chemistry, Krasnoyarsk State Medical University named after Prof. V.F. Voino-Yasenetsky, Krasnoyarsk, Russia.,Research Institute of Molecular Medicine and Pathobiochemistry, Krasnoyarsk State Medical University named after Prof. V.F. Voino-Yasenetsky, Krasnoyarsk, Russia
| | - Natalia A Malinovskaya
- Department of Biochemistry, Medical, Pharmaceutical and Toxicological Chemistry, Krasnoyarsk State Medical University named after Prof. V.F. Voino-Yasenetsky, Krasnoyarsk, Russia.,Research Institute of Molecular Medicine and Pathobiochemistry, Krasnoyarsk State Medical University named after Prof. V.F. Voino-Yasenetsky, Krasnoyarsk, Russia
| | - Anton N Shuvaev
- Research Institute of Molecular Medicine and Pathobiochemistry, Krasnoyarsk State Medical University named after Prof. V.F. Voino-Yasenetsky, Krasnoyarsk, Russia
| | - Vladimir V Salmin
- Department of Medical and Biological Physics, Krasnoyarsk State Medical University named after Prof. V.F. Voino-Yasenetsky, Krasnoyarsk, Russia
| | - Tatiana E Taranushenko
- Department of Pediatrics, Krasnoyarsk State Medical University named after Prof. V.F. Voino-Yasenetsky, Krasnoyarsk, Russia
| | - Alla B Salmina
- Department of Biochemistry, Medical, Pharmaceutical and Toxicological Chemistry, Krasnoyarsk State Medical University named after Prof. V.F. Voino-Yasenetsky, Krasnoyarsk, Russia.,Research Institute of Molecular Medicine and Pathobiochemistry, Krasnoyarsk State Medical University named after Prof. V.F. Voino-Yasenetsky, Krasnoyarsk, Russia
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6
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Roveimiab Z, Lin F, Anderson JE. Emerging Development of Microfluidics-Based Approaches to Improve Studies of Muscle Cell Migration. TISSUE ENGINEERING PART B-REVIEWS 2018; 25:30-45. [PMID: 30073911 DOI: 10.1089/ten.teb.2018.0181] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
IMPACT STATEMENT The essential interactions between and among cells in the three types of muscle tissue in development, wound healing, and regeneration of tissues, are underpinned by the ability of cardiac, smooth, and skeletal muscle cells to migrate in maintaining functional capacity after pathologies such as myocardial infarction, tissue grafting, and traumatic and postsurgical injury. Microfluidics-based devices now offer significant enhancement over conventional approaches to studying cell chemotaxis and haptotaxis that are inherent in migration. Advances in experimental approaches to muscle cell movement and tissue formation will contribute to innovations in tissue engineering for patching wound repair and muscle tissue replacement.
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Affiliation(s)
- Ziba Roveimiab
- 1 Department of Biological Sciences and University of Manitoba, Winnipeg, Canada.,2 Department of Physics and Astronomy, University of Manitoba, Winnipeg, Canada
| | - Francis Lin
- 1 Department of Biological Sciences and University of Manitoba, Winnipeg, Canada.,2 Department of Physics and Astronomy, University of Manitoba, Winnipeg, Canada
| | - Judy E Anderson
- 1 Department of Biological Sciences and University of Manitoba, Winnipeg, Canada
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7
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Saxena N, Mogha P, Dash S, Majumder A, Jadhav S, Sen S. Matrix elasticity regulates mesenchymal stem cell chemotaxis. J Cell Sci 2018. [PMID: 29535208 DOI: 10.1242/jcs.211391] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Efficient homing of human mesenchymal stem cells (hMSCs) is likely to be dictated by a combination of physical and chemical factors present in the microenvironment. However, crosstalk between the physical and chemical cues remains incompletely understood. Here, we address this question by probing the efficiency of epidermal growth factor (EGF)-induced hMSC chemotaxis on substrates of varying stiffness (3, 30 and 600 kPa) inside a polydimethylsiloxane (PDMS) microfluidic device. Chemotactic speed was found to be the sum of a stiffness-dependent component and a chemokine concentration-dependent component. While the stiffness-dependent component scaled inversely with stiffness, the chemotactic component was independent of stiffness. Faster chemotaxis on the softest 3 kPa substrates is attributed to a combination of weaker adhesions and higher protrusion rate. While chemotaxis was mildly sensitive to contractility inhibitors, suppression of chemotaxis upon actin depolymerization demonstrates the role of actin-mediated protrusions in driving chemotaxis. In addition to highlighting the collective influence of physical and chemical cues in chemotactic migration, our results suggest that hMSC homing is more efficient on softer substrates.
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Affiliation(s)
- Neha Saxena
- Department of Chemical Engineering, IIT, Bombay, Maharashtra 400076, India
| | - Pankaj Mogha
- Department of Chemical Engineering, IIT, Bombay, Maharashtra 400076, India
| | - Silalipi Dash
- Department of Chemical Engineering, IIT, Bombay, Maharashtra 400076, India
| | - Abhijit Majumder
- Department of Chemical Engineering, IIT, Bombay, Maharashtra 400076, India
| | - Sameer Jadhav
- Department of Chemical Engineering, IIT, Bombay, Maharashtra 400076, India
| | - Shamik Sen
- Department of Bioscience and Bioengineering, IIT, Bombay, Maharashtra 400076, India
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8
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Advances in Micro- and Nanotechnologies for Stem Cell-Based Translational Applications. STEM CELL BIOLOGY AND REGENERATIVE MEDICINE 2017. [DOI: 10.1007/978-3-319-29149-9_13] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Gandla D, Putta C, Ghosh S, Hazra BK. Carbon Sphere-Polyaniline Composite: A Fluorescent Scaffold for Proliferation of Adipose Derived Stem Cells and its Cellular uptake. ChemistrySelect 2016. [DOI: 10.1002/slct.201600485] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Dayakar Gandla
- Nanomaterials Laboratory, Inorganic and Physical Chemistry Division; CSIR- Indian Institute of Chemical Technology, Hyderabad-; 500007 T.S. India
- Academy of Scientific and Innovative research (AcSIR); New Delhi India
| | - Chandrababu Putta
- Nanomaterials Laboratory, Inorganic and Physical Chemistry Division; CSIR- Indian Institute of Chemical Technology, Hyderabad-; 500007 T.S. India
| | - Sutapa Ghosh
- Nanomaterials Laboratory, Inorganic and Physical Chemistry Division; CSIR- Indian Institute of Chemical Technology, Hyderabad-; 500007 T.S. India
- Academy of Scientific and Innovative research (AcSIR); New Delhi India
| | - Binoy Krishna Hazra
- School of Physics, University of Hyderabad, Hyderabad-; 500046 Telangana India
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Natarajan K, Tian C, Xiang B, Chi C, Deng J, Zhang R, Freed DH, Arora RC, Tian G, Lin F. Selection of chemotactic adipose-derived stem cells using a microfluidic gradient generator. RSC Adv 2015. [DOI: 10.1039/c4ra12863j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
We developed a microfluidics-based integrated method for on-chip selection of chemotactic adipose-derived stem cells.
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Affiliation(s)
- Kanmani Natarajan
- Department of Physics and Astronomy
- University of Manitoba
- Winnipeg
- Canada
- Department of Biological Sciences
| | - Chantal Tian
- Department of Physics and Astronomy
- University of Manitoba
- Winnipeg
- Canada
| | - Bo Xiang
- Department of Pharmacology and Therapeutics
- University of Manitoba
- Winnipeg
- Canada
- National Research Council
| | - Chao Chi
- National Research Council
- Winnipeg
- Canada
- Department of Cardiac Surgery
- The First Affiliated Hospital
| | - Jixian Deng
- National Research Council
- Winnipeg
- Canada
- Department of Physiology and Pathophysiology
- Faculty of Medicine
| | - Rundi Zhang
- Department of Physics and Astronomy
- University of Manitoba
- Winnipeg
- Canada
| | - Darren H. Freed
- Division of Cardiac Surgery
- University of Alberta Hospital
- Canada
| | - Rakesh C. Arora
- Cardiac Science Program
- St. Boniface General Hospital
- Winnipeg
- Canada
| | - Ganghong Tian
- National Research Council
- Winnipeg
- Canada
- Department of Physiology and Pathophysiology
- Faculty of Medicine
| | - Francis Lin
- Department of Physics and Astronomy
- University of Manitoba
- Winnipeg
- Canada
- Department of Biological Sciences
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Kim SH, Lee GH, Park JY, Lee SH. Microplatforms for gradient field generation of various properties and biological applications. ACTA ACUST UNITED AC 2014; 20:82-95. [PMID: 25510472 DOI: 10.1177/2211068214562247] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Well-designed microfluidic platforms can be excellent tools to eliminate bottleneck problems or issues that have arisen in biological fields by providing unprecedented high-resolution control of mechanical and chemical microenvironments for cell culture. Among such microtechnologies, the precise generation of biochemical concentration gradients has been highly regarded in the biorelated scientific fields; even today, the principles and mechanisms for gradient generation continue to be refined, and the number of applications for this technique is growing. Here, we review the current status of the concentration gradient generation technologies achieved in various microplatforms and how they have been and will be applied to biological issues, particularly those that have arisen from cancer research, stem cell research, and tissue engineering. We also provide information about the advances and future challenges in the technological aspects of microscale concentration gradient generation.
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Affiliation(s)
- Sung-Hwan Kim
- School of Mechanical Engineering, College of Engineering, Chung-Ang University, Seoul, Republic of Korea
| | - Gi-Hun Lee
- School of Mechanical Engineering, College of Engineering, Chung-Ang University, Seoul, Republic of Korea
| | - Joong Yull Park
- School of Mechanical Engineering, College of Engineering, Chung-Ang University, Seoul, Republic of Korea
| | - Sang-Hoon Lee
- Department of Biomedical Engineering, College of Health Science, Korea University, Seoul, Republic of Korea
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Abstract
Within the adult organism, stem cells reside in defined anatomical microenvironments called niches. These architecturally diverse microenvironments serve to balance stem cell self-renewal and differentiation. Proper regulation of this balance is instrumental to tissue repair and homeostasis, and any imbalance can potentially lead to diseases such as cancer. Within each of these microenvironments, a myriad of chemical and physical stimuli interact in a complex (synergistic or antagonistic) manner to tightly regulate stem cell fate. The in vitro replication of these in vivo microenvironments will be necessary for the application of stem cells for disease modeling, drug discovery, and regenerative medicine purposes. However, traditional reductionist approaches have only led to the generation of cell culture methods that poorly recapitulate the in vivo microenvironment. To that end, novel engineering and systems biology approaches have allowed for the investigation of the biological and mechanical stimuli that govern stem cell fate. In this review, the application of these technologies for the dissection of stem cell microenvironments will be analyzed. Moreover, the use of these engineering approaches to construct in vitro stem cell microenvironments that precisely control stem cell fate and function will be reviewed. Finally, the emerging trend of using high-throughput, combinatorial methods for the stepwise engineering of stem cell microenvironments will be explored.
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Affiliation(s)
- David A Brafman
- Department of Cellular and Molecular Medicine, Stem Cell Program, University of California at San Diego, La Jolla, California
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Wu J, Wu X, Lin F. Recent developments in microfluidics-based chemotaxis studies. LAB ON A CHIP 2013; 13:2484-99. [PMID: 23712326 DOI: 10.1039/c3lc50415h] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Microfluidic devices can better control cellular microenvironments compared to conventional cell migration assays. Over the past few years, microfluidics-based chemotaxis studies showed a rapid growth. New strategies were developed to explore cell migration in manipulated chemical gradients. In addition to expanding the use of microfluidic devices for a broader range of cell types, microfluidic devices were used to study cell migration and chemotaxis in complex environments. Furthermore, high-throughput microfluidic chemotaxis devices and integrated microfluidic chemotaxis systems were developed for medical and commercial applications. In this article, we review recent developments in microfluidics-based chemotaxis studies and discuss the new trends in this field observed over the past few years.
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Affiliation(s)
- Jiandong Wu
- Department of Physics and Astronomy, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
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