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Kumar R, Gulia K. The convergence of nanotechnology‐stem cell, nanotopography‐mechanobiology, and biotic‐abiotic interfaces: Nanoscale tools for tackling the top killer, arteriosclerosis, strokes, and heart attacks. NANO SELECT 2021. [DOI: 10.1002/nano.202000192] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Affiliation(s)
- Rajiv Kumar
- NIET National Institute of Medical Science Rajasthan India
| | - Kiran Gulia
- Materials and Manufacturing School of Engineering University of Wolverhampton Wolverhampton England, UK
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2
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Smith GT, Li L, Zhu Y, Bowden AK. Low-power, low-cost urinalysis system with integrated dipstick evaluation and microscopic analysis. LAB ON A CHIP 2018; 18:2111-2123. [PMID: 29926053 DOI: 10.1039/c8lc00501j] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We introduce a coupled dipstick and microscopy device for analyzing urine samples. The device is capable of accurately assessing urine dipstick results while simultaneously imaging the microscopic contents within the sample. We introduce a long working distance, cellphone-based microscope in combination with an oblique illumination scheme to accurately visualize and quantify particles within the urine sample. To facilitate accurate quantification, we couple the imaging set-up with a power-free filtration system. The proposed device is reusable, low-cost, and requires very little power. We show that results obtained with the proposed device and custom-built app are consistent with those obtained with the standard clinical protocol, suggesting the potential clinical utility of the device.
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Affiliation(s)
- Gennifer T Smith
- E. L. Ginzton Laboratory and Department of Electrical Engineering, Stanford University, Stanford, CA, USA.
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Del Giudice F, Sathish S, D’Avino G, Shen AQ. “From the Edge to the Center”: Viscoelastic Migration of Particles and Cells in a Strongly Shear-Thinning Liquid Flowing in a Microchannel. Anal Chem 2017; 89:13146-13159. [DOI: 10.1021/acs.analchem.7b02450] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Francesco Del Giudice
- Micro/Bio/Nanofluidics
Unit, Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna-son, Kunigami-gun, Okinawa 904-0495, Japan
- Systems
and Process Engineering Centre, College of Engineering, Swansea University, Fabian Way, Swansea SA1
8EN, U.K
| | - Shivani Sathish
- Micro/Bio/Nanofluidics
Unit, Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna-son, Kunigami-gun, Okinawa 904-0495, Japan
| | - Gaetano D’Avino
- Dipartimento
di Ingegneria Chimica, dei Materiali e della Produzione Industriale, Universitá degli Studi di Napoli Federico II, Piazzale Tecchio 80, 80125 Naples, Italy
| | - Amy Q. Shen
- Micro/Bio/Nanofluidics
Unit, Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna-son, Kunigami-gun, Okinawa 904-0495, Japan
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Willoughby NA, Bock H, Hoeve MA, Pells S, Williams C, McPhee G, Freile P, Choudhury D, De Sousa PA. A scalable label-free approach to separate human pluripotent cells from differentiated derivatives. BIOMICROFLUIDICS 2016; 10:014107. [PMID: 26858819 PMCID: PMC4714989 DOI: 10.1063/1.4939946] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2015] [Accepted: 01/01/2016] [Indexed: 05/24/2023]
Abstract
The broad capacity of pluripotent human embryonic stem cells (hESC) to grow and differentiate demands the development of rapid, scalable, and label-free methods to separate living cell populations for clinical and industrial applications. Here, we identify differences in cell stiffness, expressed as cell elastic modulus (CEM), for hESC versus mesenchymal progenitors, osteoblast-like derivatives, and fibroblasts using atomic force microscopy and data processing algorithms to characterize the stiffness of cell populations. Undifferentiated hESC exhibited a range of CEMs whose median was nearly three-fold lower than those of differentiated cells, information we exploited to develop a label-free separation device based on the principles of tangential flow filtration. To test the device's utility, we segregated hESC mixed with fibroblasts and hESC-mesenchymal progenitors induced to undergo osteogenic differentiation. The device permitted a throughput of 10(6)-10(7) cells per min and up to 50% removal of specific cell types per single pass. The level of enrichment and depletion of soft, pluripotent hESC in the respective channels was found to rise with increasing stiffness of the differentiating cells, suggesting CEM can serve as a major discriminator. Our results demonstrate the principle of a scalable, label-free, solution for separation of heterogeneous cell populations deriving from human pluripotent stem cells.
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Affiliation(s)
- N A Willoughby
- Institute for Biological Chemistry, Biophysics and Bioengineering, School of Engineering and Physical Sciences , Heriot-Watt University , Edinburgh EH14 4AS, United Kingdom
| | - H Bock
- Institute for Chemical Sciences, School of Engineering and Physical Sciences , Heriot-Watt University , Edinburgh, United Kingdom
| | - M A Hoeve
- Centers for Clinical Brain Sciences and Regenerative Medicine, University of Edinburgh , Edinburgh EH16 4SB, United Kingdom
| | - S Pells
- Centers for Clinical Brain Sciences and Regenerative Medicine, University of Edinburgh , Edinburgh EH16 4SB, United Kingdom
| | - C Williams
- Institute for Biological Chemistry, Biophysics and Bioengineering, School of Engineering and Physical Sciences , Heriot-Watt University , Edinburgh EH14 4AS, United Kingdom
| | - G McPhee
- Institute for Biological Chemistry, Biophysics and Bioengineering, School of Engineering and Physical Sciences , Heriot-Watt University , Edinburgh EH14 4AS, United Kingdom
| | - P Freile
- Centers for Clinical Brain Sciences and Regenerative Medicine, University of Edinburgh , Edinburgh EH16 4SB, United Kingdom
| | - D Choudhury
- Institute for Biological Chemistry, Biophysics and Bioengineering, School of Engineering and Physical Sciences , Heriot-Watt University , Edinburgh EH14 4AS, United Kingdom
| | - P A De Sousa
- Centers for Clinical Brain Sciences and Regenerative Medicine, University of Edinburgh , Edinburgh EH16 4SB, United Kingdom
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Galligan C, Nichols J, Kvam E, Spooner P, Gettings R, Zhu L, Puleo CM. Mesoscale blood cell sedimentation for processing millilitre sample volumes. LAB ON A CHIP 2015; 15:3274-3277. [PMID: 26177697 DOI: 10.1039/c5lc00644a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We demonstrate the efficient separation of blood cells from millilitre volumes of whole blood in minutes using a simple gravity sedimentation device. Blood cell and plasma separation is often the initial step in clinical diagnostics, and reliable separation techniques have remained a major obstacle for the success of point-of-care or remote diagnostics. Unlike plasma collection devices that rely solely on microchannels that restrict sample volume and throughput, we demonstrate the use of a hybrid micro/mesoscale sedimentation chamber to enable >99% capture of cells from millilitre blood samples in less than two minutes.
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Affiliation(s)
- C Galligan
- Electrical Technology Systems Organization, General Electric Global Research Centre. 1 Research Circle, Niskayuna, NY, 12308 USA.
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