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Bathrinarayanan PV, Hallam SM, Grover LM, Vigolo D, Simmons MJH. Microfluidics as a Powerful Tool to Investigate Microvascular Dysfunction in Trauma Conditions: A Review of the State-of-the-Art. Adv Biol (Weinh) 2024:e2400037. [PMID: 39031943 DOI: 10.1002/adbi.202400037] [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: 01/21/2024] [Revised: 04/18/2024] [Indexed: 07/22/2024]
Abstract
Skeletal muscle trauma such as fracture or crush injury can result in a life-threatening condition called acute compartment syndrome (ACS), which involves elevated compartmental pressure within a closed osteo-fascial compartment, leading to collapse of the microvasculature and resulting in necrosis of the tissue due to ischemia. Diagnosis of ACS is complex and controversial due to the lack of standardized objective methods, which results in high rates of misdiagnosis/late diagnosis, leading to permanent neuro-muscular damage. ACS pathophysiology is poorly understood at a cellular level due to the lack of physiologically relevant models. In this context, microfluidics organ-on-chip systems (OOCs) provide an exciting opportunity to investigate the cellular mechanisms of microvascular dysfunction that leads to ACS. In this article, the state-of-the-art OOCs designs and strategies used to investigate microvasculature dysfunction mechanisms is reviewed. The differential effects of hemodynamic shear stress on endothelial cell characteristics such as morphology, permeability, and inflammation, all of which are altered during microvascular dysfunction is highlighted. The article then critically reviews the importance of microfluidics to investigate closely related microvascular pathologies that cause ACS. The article concludes by discussing potential biomarkers of ACS with a special emphasis on glycocalyx and providing a future perspective.
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Affiliation(s)
- P Vasanthi Bathrinarayanan
- School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham, B152TT, UK
- Healthcare Technologies Institute, School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
| | - S M Hallam
- School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham, B152TT, UK
| | - L M Grover
- School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham, B152TT, UK
- Healthcare Technologies Institute, School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
| | - D Vigolo
- School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham, B152TT, UK
- The University of Sydney, School of Biomedical Engineering, Sydney, NSW, 2006, Australia
- The University of Sydney Nano Institute, The University of Sydney, Sydney, NSW, 2006, Australia
| | - M J H Simmons
- School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham, B152TT, UK
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2
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Karmakar A, Burgreen GW, Rydquist G, Antaki JF. A homogenized two-phase computational framework for meso- and macroscale blood flow simulations. COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE 2024; 247:108090. [PMID: 38394788 PMCID: PMC11018323 DOI: 10.1016/j.cmpb.2024.108090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 02/14/2024] [Accepted: 02/15/2024] [Indexed: 02/25/2024]
Abstract
BACKGROUND AND OBJECTIVE Owing to the complexity of physics linked with blood flow and its associated phenomena, appropriate modeling of the multi-constituent rheology of blood is of primary importance. To this effect, various kinds of computational fluid dynamic models have been developed, each with merits and limitations. However, when additional physics like thrombosis and embolization is included within the framework of these models, computationally efficient scalable translation becomes very difficult. Therefore, this paper presents a homogenized two-phase blood flow framework with similar characteristics to a single fluid model but retains the flow resolution of a classical two-fluid model. The presented framework is validated against four different sets of experiments. METHODS The two-phase model of blood presented here is based on the classical diffusion-flux framework. Diffusion flux models are known to be less computationally expensive than two-fluid multiphase models since the numerical implementation resembles single-phase flow models. Diffusion flux models typically use empirical slip velocity correlations to resolve the motion between phases. However, such correlations do not exist for blood. Therefore, a modified slip velocity equation is proposed, derived rigorously from the two-fluid governing equations. An additional drag law for red blood cells (RBCs) as a function of volume fraction is evaluated using a previously published cell-resolved solver. A new hematocrit-dependent expression for lift force on RBCs is proposed. The final governing equations are discretized and solved using the open-source software OpenFOAM. RESULTS The framework is validated against four sets of experiments: (i) flow through a rectangular microchannel to validate RBC velocity profiles against experimental measurements and compare computed hematocrit distributions against previously reported simulation results (ii) flow through a sudden expansion microchannel for comparing experimentally obtained contours of hematocrit distributions and normalized cell-free region length obtained at different flowrates and inlet hematocrits, (iii) flow through two hyperbolic channels to evaluate model predictions of cell-free layer thickness, and (iv) flow through a microchannel that mimics crevices of a left ventricular assist device to predict hematocrit distributions observed experimentally. The simulation results exhibit good agreement with the results of all four experiments. CONCLUSION The computational framework presented in this paper has the advantage of resolving the multiscale physics of blood flow while still leveraging numerical techniques used for solving single-phase flows. Therefore, it becomes an excellent candidate for addressing more complicated problems related to blood flow, such as modeling mechanical entrapment of RBCs within blood clots, predicting thrombus composition, and visualizing clot embolization.
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Affiliation(s)
- Abhishek Karmakar
- Department of Biomedical Engineering, Cornell University, Ithaca, NY, USA
| | - Greg W Burgreen
- Center for Advanced Vehicular Systems, Mississippi State University, Starkville, MS, USA
| | - Grant Rydquist
- Department of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY, USA
| | - James F Antaki
- Department of Biomedical Engineering, Cornell University, Ithaca, NY, USA.
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3
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Zhang T, Di Carlo D, Lim CT, Zhou T, Tian G, Tang T, Shen AQ, Li W, Li M, Yang Y, Goda K, Yan R, Lei C, Hosokawa Y, Yalikun Y. Passive microfluidic devices for cell separation. Biotechnol Adv 2024; 71:108317. [PMID: 38220118 DOI: 10.1016/j.biotechadv.2024.108317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 12/27/2023] [Accepted: 01/06/2024] [Indexed: 01/16/2024]
Abstract
The separation of specific cell populations is instrumental in gaining insights into cellular processes, elucidating disease mechanisms, and advancing applications in tissue engineering, regenerative medicine, diagnostics, and cell therapies. Microfluidic methods for cell separation have propelled the field forward, benefitting from miniaturization, advanced fabrication technologies, a profound understanding of fluid dynamics governing particle separation mechanisms, and a surge in interdisciplinary investigations focused on diverse applications. Cell separation methodologies can be categorized according to their underlying separation mechanisms. Passive microfluidic separation systems rely on channel structures and fluidic rheology, obviating the necessity for external force fields to facilitate label-free cell separation. These passive approaches offer a compelling combination of cost-effectiveness and scalability when compared to active methods that depend on external fields to manipulate cells. This review delves into the extensive utilization of passive microfluidic techniques for cell separation, encompassing various strategies such as filtration, sedimentation, adhesion-based techniques, pinched flow fractionation (PFF), deterministic lateral displacement (DLD), inertial microfluidics, hydrophoresis, viscoelastic microfluidics, and hybrid microfluidics. Besides, the review provides an in-depth discussion concerning cell types, separation markers, and the commercialization of these technologies. Subsequently, it outlines the current challenges faced in the field and presents a forward-looking perspective on potential future developments. This work hopes to aid in facilitating the dissemination of knowledge in cell separation, guiding future research, and informing practical applications across diverse scientific disciplines.
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Affiliation(s)
- Tianlong Zhang
- College of Mechanical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212100, China
| | - Dino Di Carlo
- Department of Bioengineering, University of California, Los Angeles, CA 90095, USA
| | - Chwee Teck Lim
- Department of Biomedical Engineering, National University of Singapore, Singapore 117583, Singapore
| | - Tianyuan Zhou
- College of Mechanical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212100, China
| | - Guizhong Tian
- College of Mechanical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212100, China.
| | - Tao Tang
- Department of Biomedical Engineering, National University of Singapore, Singapore 117583, Singapore
| | - Amy Q Shen
- Micro/Bio/Nanofluidics Unit, Okinawa Institute of Science and Technology Graduate University, Onna-son, Okinawa 904-0495, Japan
| | - Weihua Li
- School of Mechanical, Materials, Mechatronic and Biomedical Engineering, University of Wollongong, Wollongong, NSW 2522, Australia
| | - Ming Li
- School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, NSW 2052, Australia
| | - Yang Yang
- Institute of Deep-Sea Science and Engineering, Chinese Academy of Sciences, Sanya, Hainan 572000, China
| | - Keisuke Goda
- Department of Bioengineering, University of California, Los Angeles, CA 90095, USA; Department of Chemistry, University of Tokyo, Tokyo 113-0033, Japan; The Institute of Technological Sciences, Wuhan University, Wuhan 430072, China
| | - Ruopeng Yan
- The Institute of Technological Sciences, Wuhan University, Wuhan 430072, China
| | - Cheng Lei
- The Institute of Technological Sciences, Wuhan University, Wuhan 430072, China
| | - Yoichiroh Hosokawa
- Division of Materials Science, Nara Institute of Science and Technology, Nara 630-0192, Japan
| | - Yaxiaer Yalikun
- Division of Materials Science, Nara Institute of Science and Technology, Nara 630-0192, Japan.
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4
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Rashidi Y, Aouane O, Darras A, John T, Harting J, Wagner C, Recktenwald SM. Cell-free layer development and spatial organization of healthy and rigid red blood cells in a microfluidic bifurcation. SOFT MATTER 2023; 19:6255-6266. [PMID: 37522517 DOI: 10.1039/d3sm00517h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/01/2023]
Abstract
Bifurcations and branches in the microcirculation dramatically affect blood flow as they determine the spatiotemporal organization of red blood cells (RBCs). Such changes in vessel geometries can further influence the formation of a cell-free layer (CFL) close to the vessel walls. Biophysical cell properties, such as their deformability, which is impaired in various diseases, are often thought to impact blood flow and affect the distribution of flowing RBCs. This study investigates the flow behavior of healthy and artificially hardened RBCs in a bifurcating microfluidic T-junction. We determine the RBC distribution across the channel width at multiple positions before and after the bifurcation. Thus, we reveal distinct focusing profiles in the feeding mother channel for rigid and healthy RBCs that dramatically impact the cell organization in the successive daughter channels. Moreover, we experimentally show how the characteristic asymmetric CFLs in the daughter vessels develop along their flow direction. Complimentary numerical simulations indicate that the buildup of the CFL is faster for healthy than for rigid RBCs. Our results provide fundamental knowledge to understand the partitioning of rigid RBC as a model of cells with pathologically impaired deformability in complex in vitro networks.
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Affiliation(s)
- Yazdan Rashidi
- Dynamics of Fluids, Department of Experimental Physics, Saarland University, 66123 Saarbrücken, Germany.
| | - Othmane Aouane
- Helmholtz Institute Erlangen-Nürnberg for Renewable Energy, Forschungszentrum Jülich, 91058 Erlangen, Germany
| | - Alexis Darras
- Dynamics of Fluids, Department of Experimental Physics, Saarland University, 66123 Saarbrücken, Germany.
| | - Thomas John
- Dynamics of Fluids, Department of Experimental Physics, Saarland University, 66123 Saarbrücken, Germany.
| | - Jens Harting
- Helmholtz Institute Erlangen-Nürnberg for Renewable Energy, Forschungszentrum Jülich, 91058 Erlangen, Germany
- Department of Chemical and Biological Engineering and Department of Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91058 Erlangen, Germany
| | - Christian Wagner
- Dynamics of Fluids, Department of Experimental Physics, Saarland University, 66123 Saarbrücken, Germany.
- Department of Physics and Materials Science, University of Luxembourg, 1511 Luxembourg City, Luxembourg
| | - Steffen M Recktenwald
- Dynamics of Fluids, Department of Experimental Physics, Saarland University, 66123 Saarbrücken, Germany.
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Schulz A, Drost CC, Hesse B, Beul K, Boeckel GR, Lukasz A, Pavenstädt H, Brand M, Di Marco GS. The Endothelial Glycocalyx as a Target of Excess Soluble Fms-like Tyrosine Kinase-1. Int J Mol Sci 2023; 24:ijms24065380. [PMID: 36982455 PMCID: PMC10049398 DOI: 10.3390/ijms24065380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 03/08/2023] [Accepted: 03/09/2023] [Indexed: 03/14/2023] Open
Abstract
Soluble fms-like tyrosine kinase-1 (sFlt-1) is a secreted protein that binds heparan sulfate expressed on the endothelial glycocalyx (eGC). In this paper we analyze how excess sFlt-1 causes conformational changes in the eGC, leading to monocyte adhesion, a key event triggering vascular dysfunction. In vitro exposure of primary human umbilical vein endothelial cells to excess sFlt-1 decreased eGC height and increased stiffness as determined by atomic force microscopy (AFM). Yet, structural loss of the eGC components was not observed, as indicated by Ulex europaeus agglutinin I and wheat germ agglutinin staining. Moreover, the conformation observed under excess sFlt-1, a collapsed eGC, is flat and stiff with unchanged coverage and sustained content. Functionally, this conformation increased the endothelial adhesiveness to THP-1 monocytes by about 35%. Heparin blocked all these effects, but the vascular endothelial growth factor did not. In vivo administration of sFlt-1 in mice also resulted in the collapse of the eGC in isolated aorta analyzed ex vivo by AFM. Our findings show that excess sFlt-1 causes the collapse of the eGC and favors leukocyte adhesion. This study provides an additional mechanism of action by which sFlt-1 may cause endothelial dysfunction and injury.
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6
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Bányai A, Farkas E, Jankovics H, Székács I, Tóth EL, Vonderviszt F, Horváth R, Varga M, Fürjes P. Dean-Flow Affected Lateral Focusing and Separation of Particles and Cells in Periodically Inhomogeneous Microfluidic Channels. SENSORS (BASEL, SWITZERLAND) 2023; 23:800. [PMID: 36679593 PMCID: PMC9865988 DOI: 10.3390/s23020800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 12/29/2022] [Accepted: 01/04/2023] [Indexed: 06/17/2023]
Abstract
The purpose of the recent work is to give a better explanation of how Dean vortices affect lateral focusing, and to understand how cell morphology can alter the focusing position compared to spherical particles. The position and extent of the focused region were investigated using polystyrene fluorescent beads with different bead diameters (Ø = 0.5, 1.1, 1.97, 2.9, 4.8, 5.4, 6.08, 10.2, 15.8, 16.5 µm) at different flow rates (0.5, 1, 2 µL/s). Size-dependent focusing generated a precise map of the equilibrium positions of the spherical beads at the end of the periodically altering channels, which gave a good benchmark for focusing multi-dimensional particles and cells. The biological samples used for experiments were rod-shaped Escherichia coli (E. coli), discoid biconcave-shaped red blood cells (RBC), round or ovoid-shaped yeast, Saccharomyces cerevisiae, and soft-irregular-shaped HeLa cancer-cell-line cells to understand how the shape of the cells affects the focusing position at the end of the channel.
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Affiliation(s)
- Anita Bányai
- Centre for Energy Research, Institute of Technical Physics and Materials Science, Eötvös Loránd Research Network, Konkoly Thege Miklós Str. 29-33, H-1121 Budapest, Hungary
- 77 Elektronika Ltd., Fehérvári Str. 98, H-1111 Budapest, Hungary
- Doctoral School on Materials Sciences and Technologies, Óbuda University, Bécsi Str. 96/B, H-1034 Budapest, Hungary
| | - Enikő Farkas
- Centre for Energy Research, Institute of Technical Physics and Materials Science, Eötvös Loránd Research Network, Konkoly Thege Miklós Str. 29-33, H-1121 Budapest, Hungary
| | - Hajnalka Jankovics
- Research Institute of Biomolecular and Chemical Engineering, University of Pannonia, Egyetem Str. 10, H-8200 Veszprém, Hungary
| | - Inna Székács
- Centre for Energy Research, Institute of Technical Physics and Materials Science, Eötvös Loránd Research Network, Konkoly Thege Miklós Str. 29-33, H-1121 Budapest, Hungary
| | - Eszter Leelőssyné Tóth
- Centre for Energy Research, Institute of Technical Physics and Materials Science, Eötvös Loránd Research Network, Konkoly Thege Miklós Str. 29-33, H-1121 Budapest, Hungary
| | - Ferenc Vonderviszt
- Research Institute of Biomolecular and Chemical Engineering, University of Pannonia, Egyetem Str. 10, H-8200 Veszprém, Hungary
| | - Róbert Horváth
- Centre for Energy Research, Institute of Technical Physics and Materials Science, Eötvös Loránd Research Network, Konkoly Thege Miklós Str. 29-33, H-1121 Budapest, Hungary
| | - Máté Varga
- 77 Elektronika Ltd., Fehérvári Str. 98, H-1111 Budapest, Hungary
| | - Péter Fürjes
- Centre for Energy Research, Institute of Technical Physics and Materials Science, Eötvös Loránd Research Network, Konkoly Thege Miklós Str. 29-33, H-1121 Budapest, Hungary
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7
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3D printed microfluidics for bioanalysis: A review of recent advancements and applications. Trends Analyt Chem 2022. [DOI: 10.1016/j.trac.2022.116892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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8
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Kargar-Estahbanati A, Rallabandi B. Rotation-translation coupling of soft objects in lubricated contact. SOFT MATTER 2022; 18:4887-4896. [PMID: 35707981 DOI: 10.1039/d2sm00434h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
We study the coupling between rotation and translation of a submerged cylinder in lubricated contact with a soft elastic substrate. Using numerical solutions and asymptotic theory, we analyze the elastohydrodynamic problem over the entire range of substrate deformations relative to the thickness of the intervening fluid film. We find a strong coupling between the rotation and translation of the cylinder when the surface deformation of the substrate is comparable to the thickness of the lubricating fluid layer. In the limit of large deformations, we show that the bodies are in near-Hertzian contact and cylinder rolls without slip, reminiscent of dry frictional contact. When the surface deformation is small relative to the separation between the surfaces, the coupling persists but is weaker, and the rotation rate scales with the translation speed to the one-third power. We then show how the external application of a torque modifies these behaviors by generating different combinations of rotational and translational motions, including back-spinning and top-spinning states. We demonstrate that these behaviors are robust regardless of whether the elastic substrate is thick or thin relative to the length scales of the flow.
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Affiliation(s)
- Arash Kargar-Estahbanati
- Department of Mechanical Engineering, University of California, Riverside, California, 92521, USA.
| | - Bhargav Rallabandi
- Department of Mechanical Engineering, University of California, Riverside, California, 92521, USA.
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9
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Taylor DP, Mathur P, Renaud P, Kaigala GV. Microscale hydrodynamic confinements: shaping liquids across length scales as a toolbox in life sciences. LAB ON A CHIP 2022; 22:1415-1437. [PMID: 35348555 DOI: 10.1039/d1lc01101d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Hydrodynamic phenomena can be leveraged to confine a range of biological and chemical species without needing physical walls. In this review, we list methods for the generation and manipulation of microfluidic hydrodynamic confinements in free-flowing liquids and near surfaces, and elucidate the associated underlying theory and discuss their utility in the emerging area of open space microfluidics applied to life-sciences. Microscale hydrodynamic confinements are already starting to transform approaches in fundamental and applied life-sciences research from precise separation and sorting of individual cells, allowing localized bio-printing to multiplexing for clinical diagnosis. Through the choice of specific flow regimes and geometrical boundary conditions, hydrodynamic confinements can confine species across different length scales from small molecules to large cells, and thus be applied to a wide range of functionalities. We here provide practical examples and implementations for the formation of these confinements in different boundary conditions - within closed channels, in between parallel plates and in an open liquid volume. Further, to enable non-microfluidics researchers to apply hydrodynamic flow confinements in their work, we provide simplified instructions pertaining to their design and modelling, as well as to the formation of hydrodynamic flow confinements in the form of step-by-step tutorials and analytical toolbox software. This review is written with the idea to lower the barrier towards the use of hydrodynamic flow confinements in life sciences research.
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Affiliation(s)
- David P Taylor
- IBM Research - Europe, Säumerstrasse 4, 8803 Rüschlikon, Switzerland.
- Microsystems Laboratory 4, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Prerit Mathur
- IBM Research - Europe, Säumerstrasse 4, 8803 Rüschlikon, Switzerland.
- Dept. of Chemistry and Applied Biosciences, Eidgenössische Technische Hochschule (ETH), Vladimir-Prelog-Weg 1-5/10, 8093 Zurich, Switzerland
| | - Philippe Renaud
- Microsystems Laboratory 4, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Govind V Kaigala
- IBM Research - Europe, Säumerstrasse 4, 8803 Rüschlikon, Switzerland.
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10
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Sanchez ZAC, Vijayananda V, Virassammy DM, Rosenfeld L, Ramasubramanian AK. The interaction of vortical flows with red cells in venous valve mimics. BIOMICROFLUIDICS 2022; 16:024103. [PMID: 35282036 PMCID: PMC8896891 DOI: 10.1063/5.0078337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Accepted: 02/08/2022] [Indexed: 06/14/2023]
Abstract
The motion of cells orthogonal to the direction of main flow is of importance in natural and engineered systems. The lateral movement of red blood cells (RBCs) distal to sudden expansion is considered to influence the formation and progression of thrombosis in venous valves, aortic aneurysms, and blood-circulating devices and is also a determining parameter for cell separation applications in flow-focusing microfluidic devices. Although it is known that the unique geometry of venous valves alters the blood flow patterns and cell distribution in venous valve sinuses, the interactions between fluid flow and RBCs have not been elucidated. Here, using a dilute cell suspension in an in vitro microfluidic model of a venous valve, we quantified the spatial distribution of RBCs by microscopy and image analysis, and using micro-particle image velocimetry and 3D computational fluid dynamics simulations, we analyzed the complex flow patterns. The results show that the local hematocrit in the valve pockets is spatially heterogeneous and is significantly different from the feed hematocrit. Above a threshold shear rate, the inertial separation of streamlines and lift forces contribute to an uneven distribution of RBCs in the vortices, the entrapment of RBCs in the vortices, and non-monotonic wall shear stresses in the valve pockets. Our experimental and computational characterization provides insights into the complex interactions between fluid flow, RBC distribution, and wall shear rates in venous valve mimics, which is of relevance to understanding the pathophysiology of thrombosis and improving cell separation efficiency.
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11
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Tajima C, Inasawa S. Effects of liquid–liquid interfaces on flow of oil-in-water emulsions in a capillary tube. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2021.117394] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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12
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Trejo-Soto C, Lázaro GR, Pagonabarraga I, Hernández-Machado A. Microfluidics Approach to the Mechanical Properties of Red Blood Cell Membrane and Their Effect on Blood Rheology. MEMBRANES 2022; 12:217. [PMID: 35207138 PMCID: PMC8878405 DOI: 10.3390/membranes12020217] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 01/14/2022] [Accepted: 01/18/2022] [Indexed: 02/06/2023]
Abstract
In this article, we describe the general features of red blood cell membranes and their effect on blood flow and blood rheology. We first present a basic description of membranes and move forward to red blood cell membranes' characteristics and modeling. We later review the specific properties of red blood cells, presenting recent numerical and experimental microfluidics studies that elucidate the effect of the elastic properties of the red blood cell membrane on blood flow and hemorheology. Finally, we describe specific hemorheological pathologies directly related to the mechanical properties of red blood cells and their effect on microcirculation, reviewing microfluidic applications for the diagnosis and treatment of these diseases.
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Affiliation(s)
- Claudia Trejo-Soto
- Instituto de Física, Pontificia Universidad Católica de Valparaiso, Casilla 4059, Chile
| | - Guillermo R. Lázaro
- Departament de Física de la Materia Condensada, Universitat de Barcelona, Av. Diagonal 645, 08028 Barcelona, Spain; (G.R.L.); (I.P.); (A.H.-M.)
| | - Ignacio Pagonabarraga
- Departament de Física de la Materia Condensada, Universitat de Barcelona, Av. Diagonal 645, 08028 Barcelona, Spain; (G.R.L.); (I.P.); (A.H.-M.)
- CECAM, Centre Europeén de Calcul Atomique et Moleéculaire, École Polytechnique Feédeérale de Lausanne (EPFL), Batochime—Avenue Forel 2, 1015 Lausanne, Switzerland
- Universitat de Barcelona Institute of Complex Systems (UBICS), Universitat de Barcelona, 08028 Barcelona, Spain
| | - Aurora Hernández-Machado
- Departament de Física de la Materia Condensada, Universitat de Barcelona, Av. Diagonal 645, 08028 Barcelona, Spain; (G.R.L.); (I.P.); (A.H.-M.)
- Centre de Recerca Matemàtica, Edifici C, Campus de Bellaterra, 08193 Barcelona, Spain
- Institute of Nanoscience and Nanotechnology (IN2UB), University of Barcelona, 08028 Barcelona, Spain
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13
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Rizvi MS, Farutin A, Misbah C. Flow driven vesicle unbinding under mechanosensitive adhesion. SOFT MATTER 2022; 18:1209-1218. [PMID: 35040467 DOI: 10.1039/d1sm01284c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Ligand receptor based adhesion is the primary mode of interaction of cellular blood constituents with the endothelium. These adhered entities also experience shear flow imposed by the blood which may lead to their detachment due to the viscous lift forces. Here, we have studied the role of the ligand-receptor bond kinetics in the detachment of an adhered vesicle (a simplified cell model) under shear flow. Using boundary integral formulation we performed numerical simulation of a two dimensional vesicle under shear flow for different values of applied shear rates and time scale of bond kinetics. We observe that the vesicle demonstrates three steady state configurations - adhered, pinned and detached for fast enough ligand-receptor kinetics (akin to Lennard-Jones adhesion). However, for slow bond kinetics the pinned state is not observed. We present scaling laws for the critical shear rates corresponding to the transitions among these three states. These results can help with identifying the processes of cell adhesion/detachment in the blood stream, prevalent features during the immune response and cancer metastasis.
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Affiliation(s)
- Mohd Suhail Rizvi
- Department of Biomedical Engineering, Indian Institute of Technology Hyderabad, Kandi, Sangareddy, 502285, Telangana, India.
| | - Alexander Farutin
- Laboratoire Interdisciplinaire de Physique, Université Grenoble Alpes and CNRS, F-38000 Grenoble, France.
| | - Chaouqi Misbah
- Laboratoire Interdisciplinaire de Physique, Université Grenoble Alpes and CNRS, F-38000 Grenoble, France.
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14
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Afsaneh H, Mohammadi R. Microfluidic platforms for the manipulation of cells and particles. TALANTA OPEN 2022. [DOI: 10.1016/j.talo.2022.100092] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
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15
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Essink MH, Pandey A, Karpitschka S, Venner CH, Snoeijer JH. Regimes of Soft Lubrication. JOURNAL OF FLUID MECHANICS 2021; 915:A49. [PMID: 33746249 PMCID: PMC7610368 DOI: 10.1017/jfm.2021.96] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Elastohydrodynamic lubrication, or simply soft lubrication, refers to the motion of deformable objects near a boundary lubricated by a fluid, and is one of the key physical mechanisms to minimise friction and wear in natural and engineered systems. Hence it is of particular interest to relate the thickness of the lubricant layer to the entrainment (sliding/rolling) velocity, the mechanical loading exerted onto the contacting elements, and properties of the elastic boundary. In this work we provide an overview of the various regimes of soft lubrication for two-dimensional cylinders in lubricated contact with compliant walls. We discuss the limits of small and large entrainment velocity, which is equivalent to large and small elastic deformations, as the cylinder moves near thick or thin elastic layers. The analysis focusses on thin elastic coatings, both compressible and incompressible, for which analytical scaling laws are not yet available in the regime of large deformations. By analysing the elastohydrodynamic boundary layers that appear at the edge of the contact, we establish the missing scaling laws - including prefactors. As such, we offer a rather complete overview of physically relevant limits of soft lubrication.
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Affiliation(s)
- Martin H. Essink
- Physics of Fluids Group, Faculty of Science and Technology, Mesa+ Institute, University of Twente, 7500 AE Enschede, The Netherlands
| | - Anupam Pandey
- Physics of Fluids Group, Faculty of Science and Technology, Mesa+ Institute, University of Twente, 7500 AE Enschede, The Netherlands
- Department of Biological and Environmental Engineering, Cornell University, Ithaca, NY 14853, USA
| | - Stefan Karpitschka
- Max Planck Institute for Dynamics and Self-Organization (MPIDS), 37077 Göttingen, Germany
| | - Cornelis H. Venner
- Faculty of Engineering Technology, Engineering Fluid Dynamics, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - Jacco H. Snoeijer
- Physics of Fluids Group, Faculty of Science and Technology, Mesa+ Institute, University of Twente, 7500 AE Enschede, The Netherlands
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16
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Transient Permeabilization of Living Cells: Combining Shear Flow and Acoustofluidic Trapping for the Facilitated Uptake of Molecules. Processes (Basel) 2021. [DOI: 10.3390/pr9060913] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Here, we present a novel approach for the transient permeabilization of cells. We combined laminar shear flow in a microchannel with chaotic advection employing surface acoustic waves. First, as a fundamental result on the one hand, and as a kind of reference measurement for the more complex acoustofluidic approach on the other hand, we studied the permeabilization of cells in pure shear flow in a microchannel with Y-geometry. As a proof of principle, we used fluorescent dyes as model drugs and investigated their internalization into HeLa cells. We found that drug uptake scaled non-linearly with flow rate and thus shear stress. For calcein, we obtained a maximal enhancement factor of about 12 at an optimum flow rate of Q = 500 µL/h in the geometry used here compared to static incubation. This result is discussed in the light of structural phase transitions of lipid membranes accompanied by non-linear effects, as the plasma membrane is the main barrier to overcome. Second, we demonstrated the enhanced permeabilization of acoustically trapped cells in surface acoustic wave induced vortices in a microchannel, with an enhancement factor of about 18 compared to quasi-static incubation. Moreover, we optimized the trapping conditions regarding flow rate, the power level of the surface acoustic wave, and trapping time. Finally, we showed that our method is not limited to small molecules but can also be applied to compounds with higher molecular weight.
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17
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Li L, Shields CW, Huang J, Zhang Y, Ohiri KA, Yellen BB, Chilkoti A, López GP. Rapid capture of biomolecules from blood via stimuli-responsive elastomeric particles for acoustofluidic separation. Analyst 2021; 145:8087-8096. [PMID: 33079081 DOI: 10.1039/d0an01164a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The detection of biomarkers in blood often requires extensive and time-consuming sample preparation to remove blood cells and concentrate the biomarker(s) of interest. We demonstrate proof-of-concept for a chip-based, acoustofluidic method that enables the rapid capture and isolation of a model protein biomarker (i.e., streptavidin) from blood for off-chip quantification. Our approach makes use of two key components - namely, soluble, thermally responsive polypeptides fused to ligands for the homogeneous capture of biomarkers from whole blood and silicone microparticles functionalized with similar, tethered, thermally responsive polypeptides. When the two components are mixed together and subjected to a mild thermal trigger, the thermally responsive moieties undergo a phase transition, causing the untethered (soluble) polypeptides to co-aggregate with the particle-bound polypeptides. The mixture is then diluted with warm buffer and injected into a microfluidic channel supporting a bulk acoustic standing wave. The biomarker-bearing particles migrate to the pressure antinodes, whereas blood cells migrate to the pressure node, leading to rapid separation with efficiencies exceeding 90% in a single pass. The biomarker-bearing particles can then be analyzed via flow cytometry, with a limit of detection of 0.75 nM for streptavidin spiked in blood plasma. Finally, by cooling the solution below the solubility temperature of the polypeptides, greater than 75% of the streptavidin is released from the microparticles, offering a unique approach for downstream analysis (e.g., sequencing or structural analysis). Overall, this methodology has promise for the detection, enrichment and analysis of some biomarkers from blood and other complex biological samples.
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Affiliation(s)
- Linying Li
- NSF Research Triangle Materials Research Science and Engineering Center, Durham, NC 27708, USA.
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18
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Chien W, Gompper G, Fedosov DA. Effect of cytosol viscosity on the flow behavior of red blood cell suspensions in microvessels. Microcirculation 2020; 28:e12668. [PMID: 33131140 DOI: 10.1111/micc.12668] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Revised: 09/24/2020] [Accepted: 10/26/2020] [Indexed: 12/14/2022]
Abstract
OBJECTIVE The flow behavior of blood is strongly affected by red blood cell (RBC) properties, such as the viscosity ratio C between cytosol and suspending medium, which can significantly be altered in several pathologies (e.g. sickle-cell disease, malaria). The main objective of this study is to understand the effect of C on macroscopic blood flow properties such as flow resistance in microvessels, and to link it to the deformation and dynamics of single RBCs. METHODS We employ mesoscopic hydrodynamic simulations to investigate flow properties of RBC suspensions with different cytosol viscosities for various flow conditions in cylindrical microchannels. RESULTS Starting from a dispersed cell configuration which approximates RBC dispersion at vessel bifurcations in the microvasculature, we find that the flow convergence and development of RBC-free layer (RBC-FL) depend only weakly on C, and require a convergence length in the range of 25D-50D, where D is channel diameter. In vessels with D ≤ 20 μ m , the final resistance of developed flow is nearly the same for C = 5 and C = 1, while for D = 40 μ m , the flow resistance for C = 5 is about 10% larger than for C = 1. The similarities and differences in flow resistance can be explained by viscosity-dependent RBC-FL thicknesses, which are associated with the viscosity-dependent dynamics of single RBCs. CONCLUSIONS The weak effect on the flow resistance and RBC-FL explains why RBCs can contain a high concentration of hemoglobin for efficient oxygen delivery, without a pronounced increase in the flow resistance. Furthermore, our results suggest that significant alterations in microvascular flow in various pathologies are likely not due to mere changes in cytosolic viscosity.
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Affiliation(s)
- Wei Chien
- Theoretical Physics of Living Matter, Institute of Biological Information Processing and Institute for Advanced Simulation, Forschungszentrum Jülich, Jülich, Germany
| | - Gerhard Gompper
- Theoretical Physics of Living Matter, Institute of Biological Information Processing and Institute for Advanced Simulation, Forschungszentrum Jülich, Jülich, Germany
| | - Dmitry A Fedosov
- Theoretical Physics of Living Matter, Institute of Biological Information Processing and Institute for Advanced Simulation, Forschungszentrum Jülich, Jülich, Germany
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19
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Tang W, Zhu S, Jiang D, Zhu L, Yang J, Xiang N. Channel innovations for inertial microfluidics. LAB ON A CHIP 2020; 20:3485-3502. [PMID: 32910129 DOI: 10.1039/d0lc00714e] [Citation(s) in RCA: 76] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Inertial microfluidics has gained significant attention since first being proposed in 2007 owing to the advantages of simplicity, high throughput, precise manipulation, and freedom from an external field. Superior performance in particle focusing, filtering, concentrating, and separating has been demonstrated. As a passive technology, inertial microfluidics technology relies on the unconventional use of fluid inertia in an intermediate Reynolds number range to induce inertial migration and secondary flow, which depend directly on the channel structure, leading to particle migration to the lateral equilibrium position or trapping in a specific cavity. With the advances in micromachining technology, many channel structures have been designed and fabricated in the past decade to explore the fundamentals and applications of inertial microfluidics. However, the channel innovations for inertial microfluidics have not been discussed comprehensively. In this review, the inertial particle manipulations and underlying physics in conventional channels, including straight, spiral, sinusoidal, and expansion-contraction channels, are briefly described. Then, recent innovations in channel structure for inertial microfluidics, especially channel pattern modification and unconventional cross-sectional shape, are reviewed. Finally, the prospects for future channel innovations in inertial microfluidic chips are also discussed. The purpose of this review is to provide guidance for the continued study of innovative channel designs to improve further the accuracy and throughput of inertial microfluidics.
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Affiliation(s)
- Wenlai Tang
- School of Electrical and Automation Engineering, Jiangsu Key Laboratory of 3D Printing Equipment and Manufacturing, Nanjing Normal University, Nanjing, 210023, China.
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20
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Hochstetter A, Vernekar R, Austin RH, Becker H, Beech JP, Fedosov DA, Gompper G, Kim SC, Smith JT, Stolovitzky G, Tegenfeldt JO, Wunsch BH, Zeming KK, Krüger T, Inglis DW. Deterministic Lateral Displacement: Challenges and Perspectives. ACS NANO 2020; 14:10784-10795. [PMID: 32844655 DOI: 10.1021/acsnano.0c05186] [Citation(s) in RCA: 70] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
The advent of microfluidics in the 1990s promised a revolution in multiple industries from healthcare to chemical processing. Deterministic lateral displacement (DLD) is a continuous-flow microfluidic particle separation method discovered in 2004 that has been applied successfully and widely to the separation of blood cells, yeast, spores, bacteria, viruses, DNA, droplets, and more. Deterministic lateral displacement is conceptually simple and can deliver consistent performance over a wide range of flow rates and particle concentrations. Despite wide use and in-depth study, DLD has not yet been fully elucidated or optimized, with different approaches to the same problem yielding varying results. We endeavor here to provide up-to-date expert opinion on the state-of-art and current fundamental, practical, and commercial challenges with DLD as well as describe experimental and modeling opportunities. Because these challenges and opportunities arise from constraints on hydrodynamics, fabrication, and operation at the micro- and nanoscale, we expect this Perspective to serve as a guide for the broader micro- and nanofluidic community to identify and to address open questions in the field.
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Affiliation(s)
- Axel Hochstetter
- Department of Physics, University of Kaiserslautern, 67663 Kaiserslautern, Germany
| | - Rohan Vernekar
- School of Engineering, Institute for Multiscale Thermofluids, University of Edinburgh, EH9 3DW Edinburgh, United Kingdom
| | - Robert H Austin
- Department of Physics, Princeton University, Princeton 08544, New Jersey, United States
| | | | - Jason P Beech
- Department of Physics and NanoLund, Lund University, SE 22100 Lund, Sweden
| | - Dmitry A Fedosov
- Institute of Biological Information Processing and Institute for Advanced Simulation, Forschungszentrum Jülich, D-52425 Juelich, Germany
| | - Gerhard Gompper
- Institute of Biological Information Processing and Institute for Advanced Simulation, Forschungszentrum Jülich, D-52425 Juelich, Germany
| | - Sung-Cheol Kim
- IBM T.J. Watson Research Center, Yorktown Heights, New York 10598, United States
| | - Joshua T Smith
- IBM T.J. Watson Research Center, Yorktown Heights, New York 10598, United States
| | - Gustavo Stolovitzky
- IBM T.J. Watson Research Center, Yorktown Heights, New York 10598, United States
| | - Jonas O Tegenfeldt
- Department of Physics and NanoLund, Lund University, SE 22100 Lund, Sweden
| | - Benjamin H Wunsch
- IBM T.J. Watson Research Center, Yorktown Heights, New York 10598, United States
| | - Kerwin K Zeming
- Critical Analytics for Manufacturing of Personalized Medicine, Singapore-MIT Alliance for Research and Technology, 138602 Singapore
| | - Timm Krüger
- School of Engineering, Institute for Multiscale Thermofluids, University of Edinburgh, EH9 3DW Edinburgh, United Kingdom
| | - David W Inglis
- School of Engineering, Macquarie University, Macquarie Park, New South Wales 2109, Australia
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21
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Zhou Q, Fidalgo J, Calvi L, Bernabeu MO, Hoskins PR, Oliveira MSN, Krüger T. Spatiotemporal Dynamics of Dilute Red Blood Cell Suspensions in Low-Inertia Microchannel Flow. Biophys J 2020; 118:2561-2573. [PMID: 32325022 DOI: 10.1016/j.bpj.2020.03.019] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Revised: 03/01/2020] [Accepted: 03/17/2020] [Indexed: 11/27/2022] Open
Abstract
Microfluidic technologies are commonly used for the manipulation of red blood cell (RBC) suspensions and analyses of flow-mediated biomechanics. To enhance the performance of microfluidic devices, understanding the dynamics of the suspensions processed within is crucial. We report novel, to our knowledge, aspects of the spatiotemporal dynamics of RBC suspensions flowing through a typical microchannel at low Reynolds number. Through experiments with dilute RBC suspensions, we find an off-center two-peak (OCTP) profile of cells contrary to the centralized distribution commonly reported for low-inertia flows. This is reminiscent of the well-known "tubular pinch effect," which arises from inertial effects. However, given the conditions of negligible inertia in our experiments, an alternative explanation is needed for this OCTP profile. Our massively parallel simulations of RBC flow in real-size microfluidic dimensions using the immersed-boundary-lattice-Boltzmann method confirm the experimental findings and elucidate the underlying mechanism for the counterintuitive RBC pattern. By analyzing the RBC migration and cell-free layer development within a high-aspect-ratio channel, we show that such a distribution is co-determined by the spatial decay of hydrodynamic lift and the global deficiency of cell dispersion in dilute suspensions. We find a cell-free layer development length greater than 46 and 28 hydraulic diameters in the experiment and simulation, respectively, exceeding typical lengths of microfluidic designs. Our work highlights the key role of transient cell distribution in dilute suspensions, which may negatively affect the reliability of experimental results if not taken into account.
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Affiliation(s)
- Qi Zhou
- School of Engineering, Institute for Multiscale Thermofluids, University of Edinburgh, Edinburgh, United Kingdom
| | - Joana Fidalgo
- James Weir Fluids Laboratory, Department of Mechanical and Aerospace Engineering, University of Strathclyde, Glasgow, United Kingdom
| | - Lavinia Calvi
- School of Engineering, Institute for Multiscale Thermofluids, University of Edinburgh, Edinburgh, United Kingdom
| | - Miguel O Bernabeu
- Centre for Medical Informatics, Usher Institute, Edinburgh, United Kingdom
| | - Peter R Hoskins
- Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, United Kingdom
| | - Mónica S N Oliveira
- James Weir Fluids Laboratory, Department of Mechanical and Aerospace Engineering, University of Strathclyde, Glasgow, United Kingdom.
| | - Timm Krüger
- School of Engineering, Institute for Multiscale Thermofluids, University of Edinburgh, Edinburgh, United Kingdom.
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22
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Yooprasertchuti K, Dechadilok P. Effect of molecular shape of suspended colloids on an osmotic flow across a fibrous membrane. Chem Eng Sci 2020. [DOI: 10.1016/j.ces.2020.115521] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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23
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Affiliation(s)
- Kiran Raj M
- Department of Biomedical EngineeringNational University of Singapore Singapore 117576 Singapore
| | - Suman Chakraborty
- Department of Mechanical EngineeringIndian Institute of Technology Kharagpur Kharagpur 721302 India
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24
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Gómez Bardón R, Passos A, Piergiovanni M, Balabani S, Pennati G, Dubini G. Haematocrit heterogeneity in blood flows past microfluidic models of oxygenating fibre bundles. Med Eng Phys 2019; 73:30-38. [DOI: 10.1016/j.medengphy.2019.07.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 06/11/2019] [Accepted: 07/19/2019] [Indexed: 10/26/2022]
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25
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Laumann M, Schmidt W, Farutin A, Kienle D, Förster S, Misbah C, Zimmermann W. Emerging Attractor in Wavy Poiseuille Flows Triggers Sorting of Biological Cells. PHYSICAL REVIEW LETTERS 2019; 122:128002. [PMID: 30978078 DOI: 10.1103/physrevlett.122.128002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Indexed: 06/09/2023]
Abstract
Microflows constitute an important instrument to control particle dynamics. A prominent example is the sorting of biological cells, which relies on the ability of deformable cells to move transversely to flow lines. A classic result is that soft microparticles migrate in flows through straight microchannels to an attractor at their center. Here, we show that flows through wavy channels fundamentally change the overall picture. They lead to the emergence of a second, coexisting attractor for soft particles. Its emergence and off-center location depends on the boundary modulation and the particle properties. The related cross-stream migration of soft particles is explained by analytical considerations, Stokesian dynamics simulations in unbounded flows, and Lattice-Boltzmann simulations in bounded flows. The novel off-center attractor can be used, for instance, in diagnostics, for separating cells of different size and elasticity, which is often an indicator of their health status.
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Affiliation(s)
- Matthias Laumann
- Theoretische Physik I, Universität Bayreuth, 95440 Bayreuth, Germany
- Universite Grenoble Alpes/CNRS UMR 5588, LIPhy, 38041 Grenoble, France
| | - Winfried Schmidt
- Theoretische Physik I, Universität Bayreuth, 95440 Bayreuth, Germany
| | - Alexander Farutin
- Universite Grenoble Alpes/CNRS UMR 5588, LIPhy, 38041 Grenoble, France
| | - Diego Kienle
- Theoretische Physik I, Universität Bayreuth, 95440 Bayreuth, Germany
| | - Stephan Förster
- JNCS-1/ICS-1, Forschungszentrum Jülich, 52428 Jülich, Germany
| | - Chaouqi Misbah
- Theoretische Physik I, Universität Bayreuth, 95440 Bayreuth, Germany
- Universite Grenoble Alpes/CNRS UMR 5588, LIPhy, 38041 Grenoble, France
| | - Walter Zimmermann
- Theoretische Physik I, Universität Bayreuth, 95440 Bayreuth, Germany
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26
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Losserand S, Coupier G, Podgorski T. Migration velocity of red blood cells in microchannels. Microvasc Res 2019; 124:30-36. [PMID: 30831125 DOI: 10.1016/j.mvr.2019.02.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 02/18/2019] [Accepted: 02/18/2019] [Indexed: 11/25/2022]
Abstract
The lateral migration of red blood cells (RBCs) in confined channel flows is an important ingredient of microcirculatory hydrodynamics and is involved in the development of a cell free layer near vessel walls and influences the distribution of RBCs in networks. It is also relevant to a number of lab-on-chip applications. This migration is a consequence of their deformability and is due to the combined effects of hydrodynamic wall repulsion and the curvature of the fluid velocity profile. We performed microfluidic experiments with dilute suspensions of RBCs in which the trajectories and migration away from the channel wall are analyzed to extract the mean behavior, from which we propose a generic scaling law for the transverse migration velocity valid in a whole range of parameters relevant to microcirculatory and practical situations. Experiments with RBCs of different mechanical properties (separated by density gradient sedimentation or fixed with glutaraldehyde) show the influence of this parameter which can induce significant dispersion of the trajectories.
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Affiliation(s)
| | - Gwennou Coupier
- Université Grenoble Alpes, CNRS, LIPhy, Grenoble F-38000, France
| | - Thomas Podgorski
- Université Grenoble Alpes, CNRS, LIPhy, Grenoble F-38000, France
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27
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Hazra S, Jayaprakash KS, Pandian K, Raj A, Mitra SK, Sen AK. Non-inertial lift induced migration for label-free sorting of cells in a co-flowing aqueous two-phase system. Analyst 2019; 144:2574-2583. [DOI: 10.1039/c8an02267d] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
We present a novel label-free passive microfluidic technique for isolation of cancer cells (EpCAM+ and CD45−) from peripheral blood mononuclear cells (PBMCs) (CD45+ and EpCAM−) in aqueous two-phase system (ATPS).
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Affiliation(s)
- S. Hazra
- Department of Mechanical Engineering
- Indian Institute of Technology Madras
- Chennai-600036
- India
| | - K. S. Jayaprakash
- Department of Mechanical Engineering
- Indian Institute of Technology Madras
- Chennai-600036
- India
| | - K. Pandian
- Department of Mechanical Engineering
- Indian Institute of Technology Madras
- Chennai-600036
- India
| | - A. Raj
- Department of Mechanical Engineering
- Indian Institute of Technology Madras
- Chennai-600036
- India
| | - S. K. Mitra
- Waterloo Institute for Nanotechnology
- University of Waterloo
- Canada
| | - A. K. Sen
- Department of Mechanical Engineering
- Indian Institute of Technology Madras
- Chennai-600036
- India
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28
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M KR, Bhattacharya S, DasGupta S, Chakraborty S. Collective dynamics of red blood cells on an in vitro microfluidic platform. LAB ON A CHIP 2018; 18:3939-3948. [PMID: 30475361 DOI: 10.1039/c8lc01198b] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Understanding the dynamics of blood flow in physiologically relevant confinements turns out to be an outstanding proposition in biomedical research. Despite the large number of studies being reported to theoretically elucidate the dynamics of red blood cells (RBCs) in confined geometries, in vitro experimental studies unveiling the implications of the collective dynamics of red blood cells in physiologically relevant bio-mimetic microfluidic channels remain elusive. Here, we investigate the implications of complex dynamvic interactions between the whole blood and a deformable channel wall fabricated using a hydrogel matrix. For a range of flow rates, we map the trajectories of the RBCs for varying levels of softness of the microchannel wall. We compare these scenarios with the reference cases of rigid polydimethylsiloxane (PDMS) channels. Our results reveal that the smallest channels investigated herein exhibit the most intricate interactions between the collective dynamics of the RBC and the wall flexibility, attributable to confinement-induced hydrodynamic interactions in the presence of spatially varying shear rates. These results may open up new paradigms in conceptual understanding of in vivo dynamics of blood flow through simple in vitro experiments on a simple microfluidic platform.
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Affiliation(s)
- Kiran Raj M
- Advanced Technology Development Centre, Indian Institute of Technology Kharagpur, Kharagpur 721 302, West Bengal, India
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29
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Dasanna AK, Schwarz US. Adhesion-based sorting of blood cells: an adhesive dynamics simulation study. SOFT MATTER 2018; 14:9061-9070. [PMID: 30394471 DOI: 10.1039/c8sm01524d] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Blood cells can be sorted in microfluidic devices not only based on their sizes and deformability, but also based on their adhesive properties. In particular, white blood cells have been shown to be sorted out by using adhesive micropatterns made from stripes that are tilted in regard to the direction of shear flow. Here we use adhesive dynamics simulations for round cells to quantitatively investigate this effect and to predict the optimal tilt angle. We then apply our method to predict optimal sorting conditions for malaria-infected red blood cells, which like white blood cells also adhere to and roll on adhesive substrates.
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Affiliation(s)
- Anil K Dasanna
- BioQuant and Institute of Theoretical Physics, Heidelberg University, Heidelberg, Germany.
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30
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Jabeen Z, Yu HY, Eckmann DM, Ayyaswamy PS, Radhakrishnan R. Rheology of colloidal suspensions in confined flow: Treatment of hydrodynamic interactions in particle-based simulations inspired by dynamical density functional theory. Phys Rev E 2018; 98:042602. [PMID: 30687804 PMCID: PMC6345264 DOI: 10.1103/physreve.98.042602] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
We investigate the microstructure and rheology of a hard-sphere suspension in a Newtonian fluid confined in a cylindrical channel and undergoing pressure-driven flow using Monte Carlo simulations. We develop a hydrodynamic framework inspired by dynamical density functional theory approaches in which the contributions due to various flow-induced hydrodynamic interactions (HI) are included in the form of thermodynamic work done by these HI-derived forces in displacing the hard spheres. Using this framework, we can self-consistently determine the effect of the local microstructure on the average flow field, and vice versa, and coevolve the inhomogeneous density distribution and the flattening velocity profile with increase in the density of suspended particles. Specifically, we explore the effect on the local microstructure due to the inclusion of forces arising from confinement-induced inertial effects, forces due to solvent-mediated interparticle interactions, and the dependence of the diffusivity on the local density. We examine the dependence of the apparent viscosity of the suspension on the volume fraction of hard spheres in the cylinder, the flow rate, and the diameter of the cylinder and investigate their effects on the local microstructure.
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Affiliation(s)
- Zahera Jabeen
- Department of Mechanical Engineering and Applied Mechanics, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Hsiu-Yu Yu
- Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
| | - David M. Eckmann
- Department of Anesthesiology and Critical Care, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
- Department of Bioengineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Portonovo S. Ayyaswamy
- Department of Mechanical Engineering and Applied Mechanics, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Ravi Radhakrishnan
- Department of Bioengineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
- Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
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31
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Cooley M, Sarode A, Hoore M, Fedosov DA, Mitragotri S, Sen Gupta A. Influence of particle size and shape on their margination and wall-adhesion: implications in drug delivery vehicle design across nano-to-micro scale. NANOSCALE 2018; 10:15350-15364. [PMID: 30080212 PMCID: PMC6247903 DOI: 10.1039/c8nr04042g] [Citation(s) in RCA: 130] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Intravascular drug delivery technologies majorly utilize spherical nanoparticles as carrier vehicles. Their targets are often at the blood vessel wall or in the tissue beyond the wall, such that vehicle localization towards the wall (margination) becomes a pre-requisite for their function. To this end, some studies have indicated that under flow environment, micro-particles have a higher propensity than nano-particles to marginate to the wall. Also, non-spherical particles theoretically have a higher area of surface-adhesive interactions than spherical particles. However, detailed systematic studies that integrate various particle size and shape parameters across nano-to-micro scale to explore their wall-localization behavior in RBC-rich blood flow, have not been reported. We address this gap by carrying out computational and experimental studies utilizing particles of four distinct shapes (spherical, oblate, prolate, rod) spanning nano- to-micro scale sizes. Computational studies were performed using the Large-scale Atomic/Molecular Massively Parallel Simulator (LAMMPS) package, with Dissipative Particle Dynamics (DPD). For experimental studies, model particles were made from neutrally buoyant fluorescent polystyrene spheres, that were thermo-stretched into non-spherical shapes and all particles were surface-coated with biotin. Using microfluidic setup, the biotin-coated particles were flowed over avidin-coated surfaces in absence versus presence of RBCs, and particle adhesion and retention at the surface was assessed by inverted fluorescence microscopy. Our computational and experimental studies provide a simultaneous analysis of different particle sizes and shapes for their retention in blood flow and indicate that in presence of RBCs, micro-scale non-spherical particles undergo enhanced 'margination + adhesion' compared to nano-scale spherical particles, resulting in their higher binding. These results provide important insight regarding improved design of vascularly targeted drug delivery systems.
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Affiliation(s)
- Michaela Cooley
- Case Western Reserve University, Department of Biomedical Engineering, Cleveland, Ohio, USA.
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32
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Gutierrez M, Ojeda LS, Eniola-Adefeso O. Vascular-targeted particle binding efficacy in the presence of rigid red blood cells: Implications for performance in diseased blood. BIOMICROFLUIDICS 2018; 12:042217. [PMID: 30018696 PMCID: PMC6027197 DOI: 10.1063/1.5027760] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Accepted: 06/08/2018] [Indexed: 05/03/2023]
Abstract
The field of drug delivery has taken an interest in combating numerous blood and heart diseases via the use of injectable vascular-targeted carriers (VTCs). However, VTC technology has encountered limited efficacy due to a variety of challenges associated with the immense complexity of the in vivo blood flow environment, including the hemodynamic interactions of blood cells, which impact their margination and adhesion to the vascular wall. Red blood cell (RBC) physiology, i.e., size, shape, and deformability, drive cellular distribution in blood flow and has been shown to impact VTC margination to the vessel wall significantly. The RBC shape and deformability are known to be altered in certain human diseases, yet little experimental work has been conducted towards understanding the effect of these alterations, specifically RBC rigidity, on VTC dynamics in physiological blood flow. In this work, we investigate the impact of RBCs of varying stiffnesses on the adhesion efficacy of particles of various sizes, moduli, and shapes onto an inflamed endothelial layer in a human vasculature-inspired, in vitro blood flow model. The blood rigid RBC compositions and degrees of RBC stiffness evaluated are analogous to conditions in diseases such as sickle cell disease. We find that particles of different sizes, moduli, and shapes yield drastically different adhesion patterns in blood flow in the presence of rigid RBCs when compared to 100% healthy RBCs. Specifically, up to 50% reduction in the localization and adhesion of non-deformable 2 μm particles to the vessel wall was observed in the presence of rigid RBCs. Interestingly, deformable 2 μm particles showed enhanced vessel wall localization and adhesion, by up to 85%, depending on the rigidity of RBCs evaluated. Ultimately, this work experimentally clarifies the importance of considering RBC rigidity in the intelligent design of particle therapeutics and highlights possible implications for a wide range of diseases relating to RBC deformability.
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Affiliation(s)
- Mario Gutierrez
- Department of Chemical Engineering, University of
Michigan, Ann Arbor, Michigan 48109, USA
| | - Lauro Sebastian Ojeda
- Department of Chemical Engineering, University of
Michigan, Ann Arbor, Michigan 48109, USA
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Microfluidic cell sorting: Towards improved biocompatibility of extracorporeal lung assist devices. Sci Rep 2018; 8:8031. [PMID: 29795137 PMCID: PMC5966447 DOI: 10.1038/s41598-018-25977-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2018] [Accepted: 04/13/2018] [Indexed: 01/21/2023] Open
Abstract
Extracorporeal lung assist technology is one of the last options in critical care medicine to treat patients suffering from severe oxygenation and decarboxylation disorders. Platelet activation along with the consequent thrombus formation is a potentially life-threatening complication of this technique. To avoid platelet-dependent clot formation, this study aims at developing a microfluidic cell sorting chip that can bypass platelets prior to the membrane oxygenator of the extracorporeal lung assist device. The cell sorting chips were produced by maskless dip-in laser lithography, followed by soft lithography replication using PDMS. Citrated porcine whole blood with a clinically relevant haematocrit of 17% was used for the cell sorting experiments involving three different blood flow rates. The joint effects of flow focusing and hydrodynamic lifting forces within the cell sorting chip resulted in a reduction of up to 57% of the baseline platelet count. This cell sorting strategy is suitable for the continuous and label-free separation of red blood cells and platelets and is potentially applicable for increasing the biocompatibility and lifetime of current extracorporeal lung assist devices.
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Davies HS, Débarre D, El Amri N, Verdier C, Richter RP, Bureau L. Elastohydrodynamic Lift at a Soft Wall. PHYSICAL REVIEW LETTERS 2018; 120:198001. [PMID: 29799224 DOI: 10.1103/physrevlett.120.198001] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 03/02/2018] [Indexed: 06/08/2023]
Abstract
We study experimentally the motion of nondeformable microbeads in a linear shear flow close to a wall bearing a thin and soft polymer layer. Combining microfluidics and 3D optical tracking, we demonstrate that the steady-state bead-to-surface distance increases with the flow strength. Moreover, such lift is shown to result from flow-induced deformations of the layer, in quantitative agreement with theoretical predictions from elastohydrodynamics. This study thus provides the first experimental evidence of "soft lubrication" at play at small scale, in a system relevant, for example, to the physics of blood microcirculation.
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Affiliation(s)
| | | | - Nouha El Amri
- Université Grenoble Alpes, CNRS, LIPhy, 38000 Grenoble, France
| | - Claude Verdier
- Université Grenoble Alpes, CNRS, LIPhy, 38000 Grenoble, France
| | - Ralf P Richter
- School of Biomedical Sciences, Faculty of Biological Sciences, School of Physics and Astronomy, Faculty of Mathematics and Physical Sciences, Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds LS2 9JT, United Kingdom
- CIC biomaGUNE, Paseo Miramon 182, 20014 San Sebastian, Spain
| | - Lionel Bureau
- Université Grenoble Alpes, CNRS, LIPhy, 38000 Grenoble, France
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35
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Modeling thrombosis in silico: Frontiers, challenges, unresolved problems and milestones. Phys Life Rev 2018; 26-27:57-95. [PMID: 29550179 DOI: 10.1016/j.plrev.2018.02.005] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Revised: 02/21/2018] [Accepted: 02/24/2018] [Indexed: 12/24/2022]
Abstract
Hemostasis is a complex physiological mechanism that functions to maintain vascular integrity under any conditions. Its primary components are blood platelets and a coagulation network that interact to form the hemostatic plug, a combination of cell aggregate and gelatinous fibrin clot that stops bleeding upon vascular injury. Disorders of hemostasis result in bleeding or thrombosis, and are the major immediate cause of mortality and morbidity in the world. Regulation of hemostasis and thrombosis is immensely complex, as it depends on blood cell adhesion and mechanics, hydrodynamics and mass transport of various species, huge signal transduction networks in platelets, as well as spatiotemporal regulation of the blood coagulation network. Mathematical and computational modeling has been increasingly used to gain insight into this complexity over the last 30 years, but the limitations of the existing models remain profound. Here we review state-of-the-art-methods for computational modeling of thrombosis with the specific focus on the analysis of unresolved challenges. They include: a) fundamental issues related to physics of platelet aggregates and fibrin gels; b) computational challenges and limitations for solution of the models that combine cell adhesion, hydrodynamics and chemistry; c) biological mysteries and unknown parameters of processes; d) biophysical complexities of the spatiotemporal networks' regulation. Both relatively classical approaches and innovative computational techniques for their solution are considered; the subjects discussed with relation to thrombosis modeling include coarse-graining, continuum versus particle-based modeling, multiscale models, hybrid models, parameter estimation and others. Fundamental understanding gained from theoretical models are highlighted and a description of future prospects in the field and the nearest possible aims are given.
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Abstract
![]()
Hydrodynamic phenomena
are ubiquitous in living organisms and can
be used to manipulate cells or emulate physiological microenvironments
experienced in vivo. Hydrodynamic effects influence multiple cellular
properties and processes, including cell morphology, intracellular
processes, cell–cell signaling cascades and reaction kinetics,
and play an important role at the single-cell, multicellular, and
organ level. Selected hydrodynamic effects can also be leveraged to
control mechanical stresses, analyte transport, as well as local temperature
within cellular microenvironments. With a better understanding of
fluid mechanics at the micrometer-length scale and the advent of microfluidic
technologies, a new generation of experimental tools that provide
control over cellular microenvironments and emulate physiological
conditions with exquisite accuracy is now emerging. Accordingly, we
believe that it is timely to assess the concepts underlying hydrodynamic
control of cellular microenvironments and their applications and provide
some perspective on the future of such tools in in vitro cell-culture
models. Generally, we describe the interplay between living cells,
hydrodynamic stressors, and fluid flow-induced effects imposed on
the cells. This interplay results in a broad range of chemical, biological,
and physical phenomena in and around cells. More specifically, we
describe and formulate the underlying physics of hydrodynamic phenomena
affecting both adhered and suspended cells. Moreover, we provide an
overview of representative studies that leverage hydrodynamic effects
in the context of single-cell studies within microfluidic systems.
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Affiliation(s)
- Deborah Huber
- IBM Research-Zürich , Säumerstrasse 4, 8803 Rüschlikon, Switzerland.,Institute of Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zürich , Vladimir-Prelog-Weg 1, 8093 Zürich, Switzerland
| | - Ali Oskooei
- IBM Research-Zürich , Säumerstrasse 4, 8803 Rüschlikon, Switzerland
| | - Xavier Casadevall I Solvas
- Institute of Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zürich , Vladimir-Prelog-Weg 1, 8093 Zürich, Switzerland
| | - Andrew deMello
- Institute of Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zürich , Vladimir-Prelog-Weg 1, 8093 Zürich, Switzerland
| | - Govind V Kaigala
- IBM Research-Zürich , Säumerstrasse 4, 8803 Rüschlikon, Switzerland
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37
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Ahmmed SM, Suteria NS, Garbin V, Vanapalli SA. Hydrodynamic mobility of confined polymeric particles, vesicles, and cancer cells in a square microchannel. BIOMICROFLUIDICS 2018; 12:014114. [PMID: 29531635 PMCID: PMC5812743 DOI: 10.1063/1.5018620] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Accepted: 02/02/2018] [Indexed: 05/24/2023]
Abstract
The transport of deformable objects, including polymer particles, vesicles, and cells, has been a subject of interest for several decades where the majority of experimental and theoretical studies have been focused on circular tubes. Due to advances in microfluidics, there is a need to study the transport of individual deformable particles in rectangular microchannels where corner flows can be important. In this study, we report measurements of hydrodynamic mobility of confined polymeric particles, vesicles, and cancer cells in a linear microchannel with a square cross-section. Our operating conditions are such that the mobility is measured as a function of geometric confinement over the range 0.3 < λ < 1.5 and at specified particle Reynolds numbers that are within 0.1 < Rep < 2.5. The experimental mobility data of each of these systems is compared with the circular-tube theory of Hestroni, Haber, and Wacholder [J. Fluid Mech. 41, 689-705 (1970)] with modifications made for a square cross-section. For polymeric particles, we find that the mobility data agrees well over a large confinement range with the theory but under predicts for vesicles. The mobility of vesicles is higher in a square channel than in a circular tube, and does not depend significantly on membrane mechanical properties. The mobility of cancer cells is in good agreement with the theory up to λ ≈ 0.8, after which it deviates. Comparison of the mobility data of the three systems reveals that cancer cells have higher mobility than rigid particles but lower than vesicles, suggesting that the cell membrane frictional properties are in between a solid-like interface and a fluid bilayer. We explain further the differences in the mobility of the three systems by considering their shape deformation and surface flow on the interface. The results of this study may find potential applications in drug delivery and biomedical diagnostics.
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Affiliation(s)
- Shamim M. Ahmmed
- Chemical Engineering, Texas Tech University, Lubbock, Texas 79409, USA
| | | | - Valeria Garbin
- Department of Chemical Engineering, Imperial College London, London SW7 2AZ, United Kingdom
| | - Siva A. Vanapalli
- Chemical Engineering, Texas Tech University, Lubbock, Texas 79409, USA
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38
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Sebastian B, Favero T, Dittrich PS. The Effects of Shear Force Transmission Across Vesicle Membranes. J Phys Chem Lett 2017; 8:6128-6134. [PMID: 29190425 PMCID: PMC6426246 DOI: 10.1021/acs.jpclett.7b02676] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
We report a comprehensive study on mechanotransmission of shear forces across lipid bilayer membranes of giant unilamellar vesicles (GUVs). GUVs containing fluorescent tracer particles were immobilized on a microfluidic platform and exposed to shear flows. A method was developed for the visualization of three-dimensional flows at high precision by defocusing microscopy. We quantify the symmetry of external flow around the GUV and show its effects on vortex flows and luminal dynamics. With increasing asymmetry, luminal vortices merged while liquid exchange in between them increased. The effect of membrane composition was studied through addition of cholesterol. Mechanotransmission efficacy, quantified by the ratio of luminal flow to external flow, ranged from ε = 0.094 (0 mol % cholesterol) to ε = 0.043 (16 mol % cholesterol). Our findings give new cues to the mechanisms underlying the sensing of strength and spatial distribution of shear forces by cells and the impact of membrane composition.
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Affiliation(s)
- Bernhard Sebastian
- Department of Biosystems Science and Engineering, ETH Zurich,
Mattenstrasse 26, 4058 Basel, Switzerland
| | - Tobias Favero
- Department of Biosystems Science and Engineering, ETH Zurich,
Mattenstrasse 26, 4058 Basel, Switzerland
| | - Petra S. Dittrich
- Corresponding Author: Mailing address: ETH Zurich
Department of Biosystems Science and Engineering Mattenstrasse 26 CH-4058
Basel/Switzerland. Phone: +41 63 387 33 10;
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39
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Kolluri N, Klapperich CM, Cabodi M. Towards lab-on-a-chip diagnostics for malaria elimination. LAB ON A CHIP 2017; 18:75-94. [PMID: 29125615 DOI: 10.1039/c7lc00758b] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Malaria continues to be one of the most devastating diseases impacting global health. Although there have been significant reductions in global malaria incidence and mortality rates over the past 17 years, the disease remains endemic throughout the world, especially in low- and middle-income countries. The World Health Organization has put forth ambitious milestones moving toward a world free of malaria as part of the United Nations Millennium Goals. Mass screening and treatment of symptomatic and asymptomatic malaria infections in endemic regions is integral to these goals and requires diagnostics that are both sensitive and affordable. Lab-on-a-chip technologies provide a path toward sensitive, portable, and affordable diagnostic platforms. Here, we review and compare currently-available and emerging lab-on-a-chip diagnostic approaches in three categories: (1) protein-based tests, (2) nucleic acid tests, and (3) cell-based detection. For each category, we highlight the opportunities and challenges in diagnostics development for malaria elimination, and comment on their applicability to different phases of elimination strategies.
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Affiliation(s)
- N Kolluri
- Department of Biomedical Engineering, Boston University, Boston, MA, USA.
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40
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Yu HY, Jabeen Z, Eckmann DM, Ayyaswamy PS, Radhakrishnan R. Microstructure of Flow-Driven Suspension of Hardspheres in Cylindrical Confinement: A Dynamical Density Functional Theory and Monte Carlo Study. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:11332-11344. [PMID: 28810736 PMCID: PMC5654712 DOI: 10.1021/acs.langmuir.7b01860] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
We have studied the microstructure of a flow-driven hardsphere suspension inside a cylinder using dynamical density functional theory and Monte Carlo simulations. In order to be representative of various physical conditions that may prevail in experiments, we investigate the problem using both the grand canonical (μVT) ensemble and the canonical (NVT) ensemble. In both ensembles, the hydrodynamic effect on the suspension mediated by the presence of the confining wall is implemented in a mean-field fashion by incorporating the thermodynamic work done by the inertial lift force on the particle given the average flow field. The predicted particle distribution in the μVT ensemble displays strong structural ordering at increasing flow rates due to the correspondingly higher particle concentrations inside the cylinder. In the NVT ensemble, for dilute suspensions we observe a peak in the distribution of density at a location similar to that of the Segré-Silberberg annulus, while for dense suspensions the competing effects of the inertial lift and the hardsphere interaction lead to the formation of several annuli.
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Affiliation(s)
- Hsiu-Yu Yu
- Department of Chemical Engineering, National Taiwan University , Taipei 10617, Taiwan
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41
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Spann AP, Campbell JE, Fitzgibbon SR, Rodriguez A, Cap AP, Blackbourne LH, Shaqfeh ESG. The Effect of Hematocrit on Platelet Adhesion: Experiments and Simulations. Biophys J 2017; 111:577-588. [PMID: 27508441 DOI: 10.1016/j.bpj.2016.06.024] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2015] [Revised: 05/28/2016] [Accepted: 06/08/2016] [Indexed: 01/05/2023] Open
Abstract
The volume fraction of red blood cells (RBCs) in a capillary affects the degree to which platelets are promoted to marginate to near a vessel wall and form blood clots. In this work we investigate the relationship between RBC hematocrit and platelet adhesion activity. We perform experiments flowing blood samples through a microfluidic channel coated with type 1 collagen and observe the rate at which platelets adhere to the wall. We compare these results with three-dimensional boundary integral simulations of a suspension of RBCs and platelets in a periodic channel where platelets can adhere to the wall. In both cases, we find that the rate of platelet adhesion varies greatly with the RBC hematocrit. We observe that the relative decrease in platelet activity as hematocrit falls shows a similar profile for simulation and experiment.
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Affiliation(s)
- Andrew P Spann
- Department of Chemical Engineering, University of Texas at Austin, Austin, Texas
| | | | - Sean R Fitzgibbon
- Department of Chemical Engineering, Stanford University, Stanford, California
| | - Armando Rodriguez
- United States Army Institute of Surgical Research, JBSA-Ft Sam Houston, Texas
| | - Andrew P Cap
- United States Army Institute of Surgical Research, JBSA-Ft Sam Houston, Texas
| | - Lorne H Blackbourne
- United States Army Institute of Surgical Research, JBSA-Ft Sam Houston, Texas
| | - Eric S G Shaqfeh
- Department of Chemical Engineering, Stanford University, Stanford, California; Department of Mechanical Engineering, Stanford University, Stanford, California; Institute for Computational & Mathematical Engineering, Stanford University, Stanford, California.
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42
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Storslett KJ, Muller SJ. Evaluation and comparison of two microfluidic size separation strategies for vesicle suspensions. BIOMICROFLUIDICS 2017; 11:034112. [PMID: 28580045 PMCID: PMC5446298 DOI: 10.1063/1.4984302] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Accepted: 05/16/2017] [Indexed: 06/07/2023]
Abstract
Two size-based separation strategies are evaluated for suspensions consisting of giant unilamellar vesicles with a broad, continuous distribution of diameters. Microfluidic devices were designed to separate an initial suspension into larger and smaller particles via either filtration or inertial focusing. These separation mechanisms were tested with suspensions of vesicles and suspensions of rigid spheres separately to illustrate the effect of deformability on separation ability. We define several separation metrics to assess the separation ability and to enable comparison between separation strategies. The filtration device significantly reduced the polydispersity of the separated vesicle fractions relative to the starting suspension and displayed an ability to separate vesicle suspensions at high throughputs. The device that utilized inertial focusing exhibited adequate polydispersity reduction and performed best with diluted vesicle suspensions. The inertial device had fewer issues with debris and trapped air, leading to short device preparation times and indicating a potential for continuous separation operation.
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Affiliation(s)
- Kari J Storslett
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, USA
| | - Susan J Muller
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, USA
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43
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Fish MB, Fromen CA, Lopez-Cazares G, Golinski AW, Scott TF, Adili R, Holinstat M, Eniola-Adefeso O. Exploring deformable particles in vascular-targeted drug delivery: Softer is only sometimes better. Biomaterials 2017; 124:169-179. [PMID: 28209527 PMCID: PMC5341378 DOI: 10.1016/j.biomaterials.2017.02.002] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2016] [Revised: 01/31/2017] [Accepted: 02/01/2017] [Indexed: 10/20/2022]
Abstract
The ability of vascular-targeted drug carriers (VTCs) to localize and bind to a targeted, diseased endothelium determines their overall clinical utility. Here, we investigate how particle modulus and size determine adhesion of VTCs to the vascular wall under physiological blood flow conditions. In general, deformable microparticles (MPs) outperformed nanoparticles (NPs) in all experimental conditions tested. Our results indicate that MP modulus enhances particle adhesion in a shear-dependent manner. In low shear human blood flow profiles in vitro, low modulus particles showed favorable adhesion, while at high shear, rigid particles showed superior adhesion. This was confirmed in vivo by studying particle adhesion under venous shear profiles in a mouse model of mesenteric inflammation, where MP adhesion was 127% greater (p < 0.0001) for low modulus particles compared to more rigid ones. Mechanistically, we establish that particle collisions with leukocytes drive these trends, rather than differences in particle deformation, localization, or detachment. Overall, this work demonstrates the importance of VTC modulus as a design parameter for enhanced VTC interaction with vascular walls, and thus, contributes important knowledge for development of successful clinical theranostics with applications for many diseases.
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Affiliation(s)
- Margaret B Fish
- Department of Chemical Engineering, University of Michigan, Ann Arbor, MI 48109, United States
| | - Catherine A Fromen
- Department of Chemical Engineering, University of Michigan, Ann Arbor, MI 48109, United States
| | - Genesis Lopez-Cazares
- Department of Chemical Engineering, University of Michigan, Ann Arbor, MI 48109, United States
| | - Alexander W Golinski
- Department of Chemical Engineering, University of Michigan, Ann Arbor, MI 48109, United States
| | - Timothy F Scott
- Department of Chemical Engineering, University of Michigan, Ann Arbor, MI 48109, United States; Macromolecular Science and Engineering Program, University of Michigan, Ann Arbor, MI 48109, United States
| | - Reheman Adili
- Department of Pharmacology, University of Michigan, Ann Arbor, MI 48109, United States
| | - Michael Holinstat
- Department of Pharmacology, University of Michigan, Ann Arbor, MI 48109, United States; Department of Cardiovascular Medicine, Samuel and Jean Frankel Cardiovascular Center, University of Michigan, Ann Arbor, MI 48109, United States
| | - Omolola Eniola-Adefeso
- Department of Chemical Engineering, University of Michigan, Ann Arbor, MI 48109, United States; Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109, United States; Macromolecular Science and Engineering Program, University of Michigan, Ann Arbor, MI 48109, United States.
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44
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Jayaprakash KS, Banerjee U, Sen AK. Dynamics of rigid microparticles at the interface of co-flowing immiscible liquids in a microchannel. J Colloid Interface Sci 2017; 493:317-326. [PMID: 28119242 DOI: 10.1016/j.jcis.2017.01.034] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Revised: 01/07/2017] [Accepted: 01/10/2017] [Indexed: 11/16/2022]
Abstract
We report the dynamical migration behavior of rigid polystyrene microparticles at an interface of co-flowing streams of primary CP1 (aqueous) and secondary CP2 (oils) immiscible phases at low Reynolds numbers (Re) in a microchannel. The microparticles initially suspended in the CP1 either continue to flow in the bulk CP1 or migrate across the interface into CP2, when the stream width of the CP1 approaches the diameter of the microparticles. Experiments were performed with different secondary phases and it is found that the migration criterion depends on the sign of the spreading parameter S and the presence of surfactant at the interface. To substantiate the migration criterion, experiments were also carried out by suspending the microparticles in CP2 (oil phase). Our study reveals that in case of aqueous-silicone oil combination, the microparticles get attached to the interface since S<0 and the three phase contact angle, θ>90°. For complete detachment of microparticles from the interface into the secondary phase, additional energy ΔG is needed. We discuss the role of interfacial perturbation, which causes detachment of microparticles from the interface. In case of mineral and olive oils, the surfactants present at the interface prevents attachment of the microparticles to the interface due to the repulsive disjoining pressure. Finally, using a aqueous-silicone oil system, we demonstrate size based sorting of microparticles of size 25μm and 15μm respectively from that of 15μm and 10μm and study the variation of separation efficiency η with the ratio of the width of the aqueous stream to the diameter of the microparticles ρ.
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Affiliation(s)
- K S Jayaprakash
- Department of Mechanical Engineering, Indian Institute of Technology Madras, Chennai 600036, India
| | - U Banerjee
- Department of Mechanical Engineering, Indian Institute of Technology Madras, Chennai 600036, India
| | - A K Sen
- Department of Mechanical Engineering, Indian Institute of Technology Madras, Chennai 600036, India.
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45
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Shatova TA, Lathwal S, Engle MR, Sikes HD, Jensen KF. Portable, Constriction–Expansion Blood Plasma Separation and Polymerization-Based Malaria Detection. Anal Chem 2016; 88:7627-32. [DOI: 10.1021/acs.analchem.6b01355] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Tatyana A. Shatova
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Shefali Lathwal
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Marissa R. Engle
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Hadley D. Sikes
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Klavs F. Jensen
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
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Xavier M, Oreffo ROC, Morgan H. Skeletal stem cell isolation: A review on the state-of-the-art microfluidic label-free sorting techniques. Biotechnol Adv 2016; 34:908-923. [PMID: 27236022 DOI: 10.1016/j.biotechadv.2016.05.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Revised: 05/13/2016] [Accepted: 05/22/2016] [Indexed: 01/03/2023]
Abstract
Skeletal stem cells (SSC) are a sub-population of bone marrow stromal cells that reside in postnatal bone marrow with osteogenic, chondrogenic and adipogenic differentiation potential. SSCs reside only in the bone marrow and have organisational and regulatory functions in the bone marrow microenvironment and give rise to the haematopoiesis-supportive stroma. Their differentiation capacity is restricted to skeletal lineages and therefore the term SSC should be clearly distinguished from mesenchymal stem cells which are reported to exist in extra-skeletal tissues and, critically, do not contribute to skeletal development. SSCs are responsible for the unique regeneration capacity of bone and offer unlimited potential for application in bone regenerative therapies. A current unmet challenge is the isolation of homogeneous populations of SSCs, in vitro, with homogeneous regeneration and differentiation capacities. Challenges that limit SSC isolation include a) the scarcity of SSCs in bone marrow aspirates, estimated at between 1 in 10-100,000 mononuclear cells; b) the absence of specific markers and thus the phenotypic ambiguity of the SSC and c) the complexity of bone marrow tissue. Microfluidics provides innovative approaches for cell separation based on bio-physical features of single cells. Here we review the physical principles underlying label-free microfluidic sorting techniques and review their capacity for stem cell selection/sorting from complex (heterogeneous) samples.
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Affiliation(s)
- Miguel Xavier
- Faculty of Physical Sciences and Engineering, Institute for Life Sciences, University of Southampton, SO17 1BJ, United Kingdom.; Centre for Human Development, Stem Cells and Regeneration, Institute of Developmental Sciences, Southampton General Hospital, Tremona Road, SO16 6YD Southampton, United Kingdom..
| | - Richard O C Oreffo
- Centre for Human Development, Stem Cells and Regeneration, Institute of Developmental Sciences, Southampton General Hospital, Tremona Road, SO16 6YD Southampton, United Kingdom..
| | - Hywel Morgan
- Faculty of Physical Sciences and Engineering, Institute for Life Sciences, University of Southampton, SO17 1BJ, United Kingdom..
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Lauri J, Bykov A, Fabritius T. Quantification of cell-free layer thickness and cell distribution of blood by optical coherence tomography. JOURNAL OF BIOMEDICAL OPTICS 2016; 21:40501. [PMID: 27071412 DOI: 10.1117/1.jbo.21.4.040501] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Accepted: 03/22/2016] [Indexed: 05/25/2023]
Abstract
A high-speed optical coherence tomography (OCT) with 1-μm 1-μm axial resolution was applied to assess the thickness of a cell-free layer (CFL) and a spatial distribution of red blood cells (RBC) next to the microchannel wall. The experiments were performed in vitro in a plain glass microchannel with a width of 2 mm and height of 0.2 mm. RBCs were suspended in phosphate buffered saline solution at the hematocrit level of 45%. Flow rates of 0.1 to 0.5 ml/h 0.5 ml/h were used to compensate gravity induced CFL. The results indicate that OCT can be efficiently used for the quantification of CFL thickness and spatial distribution of RBCs in microcirculatory blood flow.
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Jayaprakash KS, Banerjee U, Sen AK. Dynamics of Aqueous Droplets at the Interface of Coflowing Immiscible Oils in a Microchannel. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:2136-43. [PMID: 26812441 DOI: 10.1021/acs.langmuir.5b04116] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We report the dynamics of aqueous droplets of different size and viscosity at the interface of a coflowing stream of immiscible oils (i.e., primary and secondary continuous phases) in a microchannel, at low Re. The lateral migration of droplets introduced into the primary continuous phase toward the interface and subsequent selective migration of droplets across the interface into the secondary continuous phase is investigated. The interplay between the competing noninertial lift and interfacial tension forces, which govern the interfacial migration of the droplets, is presented and discussed. The velocity and strain rate profiles, and interface location, which are critical for calculating the lift force and migration behavior of droplets, are presented. The trajectories of droplets of different size and viscosity in the primary continuous phase are obtained for different interface locations. During interfacial migration, the deformation behavior of droplets of different viscosities is studied. Finally, sorting of droplets based on size contrast is demonstrated and sorting efficiency is found. A new paradigm of migration and sorting of droplets is reported, which could find importance in chemical and biological applications.
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Affiliation(s)
- K S Jayaprakash
- Department of Mechanical Engineering, Indian Institute of Technology Madras , Chennai-600036, India
| | - U Banerjee
- Department of Mechanical Engineering, Indian Institute of Technology Madras , Chennai-600036, India
| | - A K Sen
- Department of Mechanical Engineering, Indian Institute of Technology Madras , Chennai-600036, India
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Affiliation(s)
- Sanjin Hosic
- Department of Chemical Engineering, Northeastern University, Boston, MA, USA
| | - Shashi K. Murthy
- Department of Chemical Engineering, Northeastern University, Boston, MA, USA
- Barnett Institute of Chemical and Biological Analysis, Northeastern University, Boston, MA, USA
| | - Abigail N. Koppes
- Department of Chemical Engineering, Northeastern University, Boston, MA, USA
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Md Ali MA, Ostrikov K(K, Khalid FA, Majlis BY, Kayani AA. Active bioparticle manipulation in microfluidic systems. RSC Adv 2016. [DOI: 10.1039/c6ra20080j] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
The motion of bioparticles in a microfluidic environment can be actively controlled using several tuneable mechanisms, including hydrodynamic, electrophoresis, dielectrophoresis, magnetophoresis, acoustophoresis, thermophoresis and optical forces.
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Affiliation(s)
- Mohd Anuar Md Ali
- Institute of Microengineering and Nanoelectronics
- Universiti Kebangsaan Malaysia
- Bangi
- Malaysia
| | - Kostya (Ken) Ostrikov
- School of Chemistry, Physics, and Mechanical Engineering
- Queensland University of Technology
- Brisbane
- Australia
- CSIRO-QUT Joint Sustainable Processes and Devices Laboratory
| | - Fararishah Abdul Khalid
- Faculty of Technology Management and Technopreneurship
- Universiti Teknikal Malaysia Melaka
- Malaysia
| | - Burhanuddin Y. Majlis
- Institute of Microengineering and Nanoelectronics
- Universiti Kebangsaan Malaysia
- Bangi
- Malaysia
| | - Aminuddin A. Kayani
- Institute of Microengineering and Nanoelectronics
- Universiti Kebangsaan Malaysia
- Bangi
- Malaysia
- Center for Advanced Materials and Green Technology
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