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Yan S, Jia Z, Zhang Z, Liu Y, Liu B, Ren Y, Yang X. Continuously tunable separation of light-induced Haematococcus pluvialis using an ultrastretchable, sheath-flow-assisted elasto-inertial microchannel. Anal Chim Acta 2024; 1317:342884. [PMID: 39030017 DOI: 10.1016/j.aca.2024.342884] [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: 04/25/2024] [Revised: 06/05/2024] [Accepted: 06/17/2024] [Indexed: 07/21/2024]
Abstract
BACKGROUND A proportion of Haematococcus pluvialis under the light stress can effectively conduct astaxanthin biosynthesis, leading to the increase in cell size. Although the size is a critical indicator for identifying the astaxanthin-rich H. pluvialis cells, the cut-off size to be separated varies from sample to sample. RESULTS Here, we report an ultrastretchable, straight elasto-inertial microchannel with tunable separation threshold to continuously separate the light-induced H. pluvialis cells by size. The symmetrical sheath flows confine the particles to the channel sidewalls, and large particles can cross the interface of viscoelastic fluids to the equilibrium position at the channel centerline. By stretching the microfluidic chip, the medium-sized particles can gradually migrate to the channel centerline in the narrower and longer channel, bringing the tunable separation threshold. Results show that the separation performance of the ultrastretchable microfluidic device is affected by total flow rate, flow rate ratio of sheath to sample, polyethylene oxide (PEO) solution configuration. Lastly, size-tunable separation of light-induced H. pluvialis cells is demonstrated. SIGNIFICANCE To the best of our knowledge, this is the first report on cell migration in co-flow configurations in the ultra-stretchable microfluidics. Separation of H. pluvialis is not only a relevant end application in harvesting the astaxanthin-rich species, but the separated populations of highly productive microalgal cells will open a venue for cellular directed evolution.
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Affiliation(s)
- Sheng Yan
- Institute for Advanced Study, Shenzhen University, Shenzhen, China; College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen, China.
| | - Zixuan Jia
- Institute for Advanced Study, Shenzhen University, Shenzhen, China
| | - Zhikai Zhang
- Institute for Advanced Study, Shenzhen University, Shenzhen, China
| | - Yong Liu
- Institute for Advanced Study, Shenzhen University, Shenzhen, China; College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen, China
| | - Bin Liu
- Institute for Advanced Study, Shenzhen University, Shenzhen, China
| | - Yong Ren
- Research Group for Fluids and Thermal Engineering, University of Nottingham Ningbo China, Ningbo, China; Department of Mechanical, Materials and Manufacturing Engineering, University of Nottingham Ningbo China, Ningbo, China; Nottingham Ningbo China Beacons of Excellence Research and Innovation Institute, University of Nottingham Ningbo China, Ningbo, China.
| | - Xiaogang Yang
- Department of Mechanical, Materials and Manufacturing Engineering, University of Nottingham Ningbo China, Ningbo, China.
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2
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Jia Z, Wu J, Wu X, Yuan Q, Chan Y, Liu B, Zhang J, Yan S. Size-Tunable Elasto-Inertial Sorting of Haematococcus pluvialis in the Ultrastretchable Microchannel. Anal Chem 2023; 95:13338-13345. [PMID: 37585740 DOI: 10.1021/acs.analchem.3c02648] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/18/2023]
Abstract
Haematococcus pluvialis is a good source of astaxanthin, which reduces oxidation in the human body, treats inflammation, and slows the growth of breast and skin cancer cells. Since the size of H. pluvialis is often closely related to astaxanthin yield, size-based microalgal separation has far-reaching significance for high-value algae extraction and algal directed evolution. In this work, we report a novel size-tunable elasto-inertial sorting of H. pluvialis in the Ecoflex ultrastretchable microfluidic devices. Ecoflex microfluidic chips can deform and be flexible, bringing flexibility and stretchability to microchannels as well as new possibilities for large-scale modulation of channel geometry. Here, the effects of velocity, channel elongation, and particle size on the elasto-inertial migration of particles are systematically studied. We found that channel elongation has a strong regulating effect on particle focusing. In addition, we verified the continuous regulation of the sorting threshold of microalgal cells by stretching the channel, providing technical support for the extraction and directed evolution of high-yield microalgae.
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Affiliation(s)
- Zixuan Jia
- Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China
| | - Jialin Wu
- Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China
- Nanophotonics Research Center, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen 518060, China
| | - Xiuru Wu
- Nanophotonics Research Center, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen 518060, China
| | - Qingwei Yuan
- Nanophotonics Research Center, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen 518060, China
| | - Yue Chan
- Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China
| | - Bin Liu
- Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China
| | - Jun Zhang
- Queensland Micro- and Nanotechnology Centre, Griffith University, Nathan, Queensland 4111, Australia
| | - Sheng Yan
- Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China
- College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen 518060, China
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3
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Asterarcys quadricellulare (Chlorophyceae) protects H9c2 cardiomyoblasts from H 2O 2-induced oxidative stress. Mol Cell Biochem 2022:10.1007/s11010-022-04626-7. [PMID: 36583795 PMCID: PMC10359365 DOI: 10.1007/s11010-022-04626-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Accepted: 11/28/2022] [Indexed: 12/31/2022]
Abstract
Oxidative stress has recently been identified as an important mediator of cardiovascular diseases. The need to find efficient antioxidant molecules is essential in the disease's prevention. Therefore, the present study aimed to evaluate the potential of microalgae bioactive in protecting H9c2 cardiomyoblasts from H2O2-induced oxidative stress. Four microalgal species were investigated for their antioxidant capacity. A qualitative assessment of oxidative stress in H9c2 cardiomyoblasts stained with DCFH-DA, treated with the highly active microalgae extracts, was performed. The protein expression of total caspase-3 was also examined to investigate whether the extract protects H9c2 cardimyoblasts from H2O2-induced apoptosis. High antioxidant activity was observed for the hexanoic extracts after 10 days of cultivation. Asterarcys quadricellulare exhibited the highest antioxidant capacity of 110.59 ± 1.75 mg TE g-1 dry weight and was tested against H9c2 cardiomyoblasts, which were initially subjected to H2O2-induced oxidative stress. This hexanoic extract protected against H2O2 induced oxidative stress with a similar scavenging capacity as N-Acetylcysteine. Furthermore, total caspase-3 was increased following treatment with the hexanoic extract, suggesting that A. quadricellulare also had anti-apoptotic properties. The outcome of our study highlighted the possible use of the local A. quadricellulare strain QUCCCM10 as a natural, safe, and efficient antioxidant to prevent cardiovascular diseases.
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Park S, Lee S, Kim HS, Choi HJ, Jeong OC, Lin R, Cho Y, Lee MH. Square microchannel enables to focus and orient ellipsoidal Euglena gracilis cells by two-dimensional acoustic standing wave. Mikrochim Acta 2022; 189:331. [PMID: 35969307 DOI: 10.1007/s00604-022-05439-7] [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: 03/28/2022] [Accepted: 07/31/2022] [Indexed: 11/26/2022]
Abstract
Flow cytometry has become an indispensable tool for counting, analyzing, and sorting large cell populations in biological research and medical practice. Unfortunately, it has limitations in the analysis of non-spherically shaped cells due to the variation of their alignment with respect to the flow direction and, hence, the optical interrogation axis, resulting in unreliable cell analysis. Here, we present a simple on-chip acoustofluidic method to fix the orientation of ellipsoidal cells and focus them into a single, aligned stream. Specifically, by generating acoustic standing waves inside a 100 ⋅ 100 µm square-shaped microchannel, we successfully aligned and focused up to 97.7% of a population of Euglena gracilis (an ellipsoidal shaped microalgal species) cells in the center of the microchannel with high precision at a volume rate of 25 to 200 µL min-1. Uniform positioning of ellipsoidal cells is essential for making flow cytometry applicable to the investigation of a greater variety of cell populations and is expected to be beneficial for ecological studies and aquaculture.
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Affiliation(s)
- Sungryul Park
- School of Integrative Engineering, Chung-Ang University, Seoul, 06974, Republic of Korea
| | | | - Hyun Soo Kim
- Department of Electronic Engineering, Kwangwoon University, Seoul, 01897, Republic of Korea
| | - Hong Jin Choi
- Department of Digital Anti-Aging Health Care, Inje University, Gimhae-si, 50834, Republic of Korea
| | - Ok Chan Jeong
- Department of Biomedical Engineering, Inje University, Gimhae-si, 50834, Republic of Korea
| | - Ruixian Lin
- School of Integrative Engineering, Chung-Ang University, Seoul, 06974, Republic of Korea
| | - Younghak Cho
- Department of Mechanical Design and Robot Engineering, Seoul National University of Science & Technology, Seoul, 01811, Republic of Korea.
| | - Min-Ho Lee
- School of Integrative Engineering, Chung-Ang University, Seoul, 06974, Republic of Korea.
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5
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Ugawa M, Lee H, Baasch T, Lee M, Kim S, Jeong O, Choi YH, Sohn D, Laurell T, Ota S, Lee S. Reduced acoustic resonator dimensions improve focusing efficiency of bacteria and submicron particles. Analyst 2021; 147:274-281. [PMID: 34889326 DOI: 10.1039/d1an01891d] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
In this study, we demonstrate an acoustofluidic device that enables single-file focusing of submicron particles and bacteria using a two-dimensional (2D) acoustic standing wave. The device consists of a 100 μm × 100 μm square channel that supports 2D particle focusing in the channel center at an actuation frequency of 7.39 MHz. This higher actuation frequency compared with conventional bulk acoustic systems enables radiation-force-dominant motion of submicron particles and overcomes the classical size limitation (≈2 μm) of acoustic focusing. We present acoustic radiation force-based focusing of particles with diameters less than 0.5 μm at a flow rate of 12 μL min-1, and 1.33 μm particles at flow rates up to 80 μL min-1. The device focused 0.25 μm particles by the 2D acoustic radiation force while undergoing a channel cross-section centered, single-vortex acoustic streaming. A suspension of bacteria was also investigated to evaluate the biological relevance of the device, which demonstrated the alignment of bacteria in the channel at a flow rate of up to 20 μL min-1. The developed acoustofluidic device can align submicron particles within a narrow flow stream in a highly robust manner, validating its use as a flow-through focusing chamber to perform high-throughput and accurate flow cytometry of submicron objects.
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Affiliation(s)
- Masashi Ugawa
- RCAST, The University of Tokyo, 153-8904, Tokyo, Japan.
| | - Hoyeon Lee
- Department of Chemistry, Research Institute for Convergence of Basic Science, Hanyang University, Seoul, 04763, Korea
| | - Thierry Baasch
- Department of Biomedical engineering, Lund University, 22363, Lund, Sweden
| | - Minho Lee
- School of integrative engineering, Chung-Ang University, Seoul, 06974, Korea
| | - Soyun Kim
- Convergence Research Institute, Korea University, 02841, Seoul, Korea.,PCL Inc., 05854, Seoul, Korea
| | - OkChan Jeong
- Department of Biomedical Engineering, Inje University, Gimhae-si, 50834, Korea
| | | | - Daewon Sohn
- Department of Chemistry, Research Institute for Convergence of Basic Science, Hanyang University, Seoul, 04763, Korea
| | - Thomas Laurell
- Department of Biomedical engineering, Lund University, 22363, Lund, Sweden
| | - Sadao Ota
- RCAST, The University of Tokyo, 153-8904, Tokyo, Japan.
| | - SangWook Lee
- RCAST, The University of Tokyo, 153-8904, Tokyo, Japan. .,Bio-health Product Research Center, Inje University, Gimhae-si, 50834, Korea
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6
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Inertial Microfluidics-Based Separation of Microalgae Using a Contraction-Expansion Array Microchannel. MICROMACHINES 2021; 12:mi12010097. [PMID: 33477950 PMCID: PMC7833403 DOI: 10.3390/mi12010097] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 01/15/2021] [Accepted: 01/16/2021] [Indexed: 12/21/2022]
Abstract
Microalgae separation technology is essential for both executing laboratory-based fundamental studies and ensuring the quality of the final algal products. However, the conventional microalgae separation technology of micropipetting requires highly skilled operators and several months of repeated separation to obtain a microalgal single strain. This study therefore aimed at utilizing microfluidic cell sorting technology for the simple and effective separation of microalgae. Microalgae are characterized by their various morphologies with a wide range of sizes. In this study, a contraction-expansion array microchannel, which utilizes these unique properties of microalgae, was specifically employed for the size-based separation of microalgae. At Reynolds number of 9, two model algal cells, Chlorella vulgaris (C. vulgaris) and Haematococcus pluvialis (H. pluvialis), were successfully separated without showing any sign of cell damage, yielding a purity of 97.9% for C. vulgaris and 94.9% for H. pluvialis. The result supported that the inertia-based separation technology could be a powerful alternative to the labor-intensive and time-consuming conventional microalgae separation technologies.
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7
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Iino T, Okano K, Lee SW, Yamakawa T, Hagihara H, Hong ZY, Maeno T, Kasai Y, Sakuma S, Hayakawa T, Arai F, Ozeki Y, Goda K, Hosokawa Y. High-speed microparticle isolation unlimited by Poisson statistics. LAB ON A CHIP 2019; 19:2669-2677. [PMID: 31332412 DOI: 10.1039/c9lc00324j] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
High-speed isolation of microparticles (e.g., microplastics, heavy metal particles, microbes, cells) from heterogeneous populations is the key element of high-throughput sorting instruments for chemical, biological, industrial and medical applications. Unfortunately, the performance of continuous microparticle isolation or so-called sorting is fundamentally limited by the trade-off between throughput, purity, and yield. For example, at a given throughput, high-purity sorting needs to sacrifice yield, or vice versa. This is due to Poisson statistics of events (i.e., microparticles, microparticle clusters, microparticle debris) in which the interval between successive events is stochastic and can be very short. Here we demonstrate an on-chip microparticle sorter with an ultrashort switching window in both time (10 μs) and space (10 μm) at a high flow speed of 1 m s-1, thereby overcoming the Poisson trade-off. This is made possible by using femtosecond laser pulses that can produce highly localized transient cavitation bubbles in a microchannel to kick target microparticles from an acoustically focused, densely aligned, bumper-to-bumper stream of microparticles. Our method is important for rare-microparticle sorting applications where both high purity and high yield are required to avoid missing rare microparticles.
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Affiliation(s)
- Takanori Iino
- Division of Materials Science, Nara Institute of Science and Technology, Ikoma 630-0192, Japan.
| | - Kazunori Okano
- Division of Materials Science, Nara Institute of Science and Technology, Ikoma 630-0192, Japan.
| | - Sang Wook Lee
- Department of Chemistry, The University of Tokyo, Tokyo 113-0033, Japan
| | - Takeshi Yamakawa
- Division of Materials Science, Nara Institute of Science and Technology, Ikoma 630-0192, Japan.
| | - Hiroki Hagihara
- Division of Materials Science, Nara Institute of Science and Technology, Ikoma 630-0192, Japan.
| | - Zhen-Yi Hong
- Division of Materials Science, Nara Institute of Science and Technology, Ikoma 630-0192, Japan.
| | - Takanori Maeno
- Division of Materials Science, Nara Institute of Science and Technology, Ikoma 630-0192, Japan.
| | - Yusuke Kasai
- Department of Micro-Nano Mechanical Science and Engineering, Nagoya University, Nagoya 464-8603, Japan
| | - Shinya Sakuma
- Department of Micro-Nano Mechanical Science and Engineering, Nagoya University, Nagoya 464-8603, Japan
| | - Takeshi Hayakawa
- Department of Micro-Nano Mechanical Science and Engineering, Nagoya University, Nagoya 464-8603, Japan and Department of Precision Mechanics, Chuo University, Tokyo 112-8551, Japan
| | - Fumihito Arai
- Department of Micro-Nano Mechanical Science and Engineering, Nagoya University, Nagoya 464-8603, Japan
| | - Yasuyuki Ozeki
- Department of Electrical Engineering and Information Systems, The University of Tokyo, Tokyo 113-8656, Japan
| | - Keisuke Goda
- Department of Chemistry, The University of Tokyo, Tokyo 113-0033, Japan and Japan Science and Technology Agency, Kawaguchi 332-0012, Japan and Institute of Technological Sciences, Wuhan University, Wuhan 430072, China
| | - Yoichiroh Hosokawa
- Division of Materials Science, Nara Institute of Science and Technology, Ikoma 630-0192, Japan.
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8
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Label-free chemical imaging flow cytometry by high-speed multicolor stimulated Raman scattering. Proc Natl Acad Sci U S A 2019; 116:15842-15848. [PMID: 31324741 PMCID: PMC6690022 DOI: 10.1073/pnas.1902322116] [Citation(s) in RCA: 89] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Imaging flow cytometry is a powerful tool for analyzing every single cell in a large heterogeneous population but relies on fluorescent labeling, which comes with cytotoxicity, nonspecific binding, and interference with natural cellular functions. This paper presents label-free multicolor chemical imaging flow cytometry based on stimulated Raman scattering (SRS), a highly sensitive method of molecular vibrational spectroscopy. With the help of deep learning, it demonstrates high-precision characterization and classification of microalgal cells and cancer cells without the need for fluorescent labeling. Combining the strength of flow cytometry with fluorescence imaging and digital image analysis, imaging flow cytometry is a powerful tool in diverse fields including cancer biology, immunology, drug discovery, microbiology, and metabolic engineering. It enables measurements and statistical analyses of chemical, structural, and morphological phenotypes of numerous living cells to provide systematic insights into biological processes. However, its utility is constrained by its requirement of fluorescent labeling for phenotyping. Here we present label-free chemical imaging flow cytometry to overcome the issue. It builds on a pulse pair-resolved wavelength-switchable Stokes laser for the fastest-to-date multicolor stimulated Raman scattering (SRS) microscopy of fast-flowing cells on a 3D acoustic focusing microfluidic chip, enabling an unprecedented throughput of up to ∼140 cells/s. To show its broad utility, we use the SRS imaging flow cytometry with the aid of deep learning to study the metabolic heterogeneity of microalgal cells and perform marker-free cancer detection in blood.
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9
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Isozaki A, Mikami H, Hiramatsu K, Sakuma S, Kasai Y, Iino T, Yamano T, Yasumoto A, Oguchi Y, Suzuki N, Shirasaki Y, Endo T, Ito T, Hiraki K, Yamada M, Matsusaka S, Hayakawa T, Fukuzawa H, Yatomi Y, Arai F, Di Carlo D, Nakagawa A, Hoshino Y, Hosokawa Y, Uemura S, Sugimura T, Ozeki Y, Nitta N, Goda K. A practical guide to intelligent image-activated cell sorting. Nat Protoc 2019; 14:2370-2415. [PMID: 31278398 DOI: 10.1038/s41596-019-0183-1] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Accepted: 04/18/2019] [Indexed: 02/08/2023]
Abstract
Intelligent image-activated cell sorting (iIACS) is a machine-intelligence technology that performs real-time intelligent image-based sorting of single cells with high throughput. iIACS extends beyond the capabilities of fluorescence-activated cell sorting (FACS) from fluorescence intensity profiles of cells to multidimensional images, thereby enabling high-content sorting of cells or cell clusters with unique spatial chemical and morphological traits. Therefore, iIACS serves as an integral part of holistic single-cell analysis by enabling direct links between population-level analysis (flow cytometry), cell-level analysis (microscopy), and gene-level analysis (sequencing). Specifically, iIACS is based on a seamless integration of high-throughput cell microscopy (e.g., multicolor fluorescence imaging, bright-field imaging), cell focusing, cell sorting, and deep learning on a hybrid software-hardware data management infrastructure, enabling real-time automated operation for data acquisition, data processing, intelligent decision making, and actuation. Here, we provide a practical guide to iIACS that describes how to design, build, characterize, and use an iIACS machine. The guide includes the consideration of several important design parameters, such as throughput, sensitivity, dynamic range, image quality, sort purity, and sort yield; the development and integration of optical, microfluidic, electrical, computational, and mechanical components; and the characterization and practical usage of the integrated system. Assuming that all components are readily available, a team of several researchers experienced in optics, electronics, digital signal processing, microfluidics, mechatronics, and flow cytometry can complete this protocol in ~3 months.
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Affiliation(s)
- Akihiro Isozaki
- Department of Chemistry, The University of Tokyo, Tokyo, Japan
| | - Hideharu Mikami
- Department of Chemistry, The University of Tokyo, Tokyo, Japan
| | | | - Shinya Sakuma
- Department of Micro-Nano Mechanical Science and Engineering, Nagoya University, Nagoya, Japan
| | - Yusuke Kasai
- Department of Micro-Nano Mechanical Science and Engineering, Nagoya University, Nagoya, Japan
| | - Takanori Iino
- Department of Electrical Engineering and Information Systems, The University of Tokyo, Tokyo, Japan
| | - Takashi Yamano
- Laboratory of Applied Molecular Microbiology, Kyoto University, Kyoto, Japan
| | - Atsushi Yasumoto
- Department of Clinical Laboratory Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Yusuke Oguchi
- Department of Biological Sciences, The University of Tokyo, Tokyo, Japan
| | - Nobutake Suzuki
- Department of Biological Sciences, The University of Tokyo, Tokyo, Japan
| | | | | | - Takuro Ito
- Department of Chemistry, The University of Tokyo, Tokyo, Japan.,Japan Science and Technology Agency, Saitama, Japan
| | - Kei Hiraki
- Department of Chemistry, The University of Tokyo, Tokyo, Japan
| | - Makoto Yamada
- Department of Intelligence Science and Technology, Graduate School of Informatics, Kyoto University, Kyoto, Japan
| | - Satoshi Matsusaka
- Clinical Research and Regional Innovation, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Takeshi Hayakawa
- Department of Precision Mechanics, Chuo University, Tokyo, Japan
| | - Hideya Fukuzawa
- Laboratory of Applied Molecular Microbiology, Kyoto University, Kyoto, Japan
| | - Yutaka Yatomi
- Department of Clinical Laboratory Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Fumihito Arai
- Department of Micro-Nano Mechanical Science and Engineering, Nagoya University, Nagoya, Japan
| | - Dino Di Carlo
- Department of Chemistry, The University of Tokyo, Tokyo, Japan.,Department of Bioengineering, University of California, Los Angeles, Los Angeles, CA, USA.,Department of Mechanical Engineering, University of California, Los Angeles, Los Angeles, CA, USA.,California NanoSystems Institute, University of California, Los Angeles, Los Angeles, CA, USA
| | - Atsuhiro Nakagawa
- Department of Neurosurgery, Graduate School of Medicine, Tohoku University, Sendai, Japan
| | - Yu Hoshino
- Department of Chemical Engineering, Kyushu University, Fukuoka, Japan
| | - Yoichiroh Hosokawa
- Division of Materials Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, Ikoma, Japan
| | - Sotaro Uemura
- Department of Biological Sciences, The University of Tokyo, Tokyo, Japan
| | - Takeaki Sugimura
- Department of Chemistry, The University of Tokyo, Tokyo, Japan.,Japan Science and Technology Agency, Saitama, Japan
| | - Yasuyuki Ozeki
- Department of Electrical Engineering and Information Systems, The University of Tokyo, Tokyo, Japan
| | - Nao Nitta
- Department of Chemistry, The University of Tokyo, Tokyo, Japan.,Japan Science and Technology Agency, Saitama, Japan
| | - Keisuke Goda
- Department of Chemistry, The University of Tokyo, Tokyo, Japan. .,Japan Science and Technology Agency, Saitama, Japan. .,Department of Electrical Engineering, University of California, Los Angeles, Los Angeles, CA, USA.
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10
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Acoustic Compressibility of Caenorhabditis elegans. Biophys J 2018; 115:1817-1825. [PMID: 30314654 DOI: 10.1016/j.bpj.2018.08.048] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Revised: 08/13/2018] [Accepted: 08/20/2018] [Indexed: 02/03/2023] Open
Abstract
The acoustic compressibility of Caenorhabditis elegans is a necessary parameter for further understanding the underlying physics of acoustic manipulation techniques of this widely used model organism in biological sciences. In this work, numerical simulations were combined with experimental trajectory velocimetry of L1 C. elegans larvae to estimate the acoustic compressibility of C. elegans. A method based on bulk acoustic wave acoustophoresis was used for trajectory velocimetry experiments in a microfluidic channel. The model-based data analysis took into account the different sizes and shapes of L1 C. elegans larvae (255 ± 26 μm in length and 15 ± 2 μm in diameter). Moreover, the top and bottom walls of the microfluidic channel were considered in the hydrodynamic drag coefficient calculations, for both the C. elegans and the calibration particles. The hydrodynamic interaction between the specimen and the channel walls was further minimized by acoustically levitating the C. elegans and the particles to the middle of the measurement channel. Our data suggest an acoustic compressibility κCe of 430 TPa-1 with an uncertainty range of ±20 TPa-1 for C. elegans, a much lower value than what was previously reported for adult C. elegans using static methods. Our estimated compressibility is consistent with the relative volume fraction of lipids and proteins that would mainly make up for the body of C. elegans. This work is a departing point for practical engineering and design criteria for integrated acoustofluidic devices for biological applications.
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11
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Guo B, Lei C, Wu Y, Kobayashi H, Ito T, Yalikun Y, Lee S, Isozaki A, Li M, Jiang Y, Yasumoto A, Di Carlo D, Tanaka Y, Yatomi Y, Ozeki Y, Goda K. Optofluidic time-stretch quantitative phase microscopy. Methods 2017; 136:116-125. [PMID: 29031836 DOI: 10.1016/j.ymeth.2017.10.004] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Revised: 10/02/2017] [Accepted: 10/04/2017] [Indexed: 11/18/2022] Open
Abstract
Innovations in optical microscopy have opened new windows onto scientific research, industrial quality control, and medical practice over the last few decades. One of such innovations is optofluidic time-stretch quantitative phase microscopy - an emerging method for high-throughput quantitative phase imaging that builds on the interference between temporally stretched signal and reference pulses by using dispersive properties of light in both spatial and temporal domains in an interferometric configuration on a microfluidic platform. It achieves the continuous acquisition of both intensity and phase images with a high throughput of more than 10,000 particles or cells per second by overcoming speed limitations that exist in conventional quantitative phase imaging methods. Applications enabled by such capabilities are versatile and include characterization of cancer cells and microalgal cultures. In this paper, we review the principles and applications of optofluidic time-stretch quantitative phase microscopy and discuss its future perspective.
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Affiliation(s)
- Baoshan Guo
- Department of Chemistry, University of Tokyo, Tokyo 113-0033, Japan
| | - Cheng Lei
- Department of Chemistry, University of Tokyo, Tokyo 113-0033, Japan.
| | - Yi Wu
- Department of Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA
| | | | - Takuro Ito
- Japan Science and Technology Agency, Kawaguchi 332-0012, Japan
| | - Yaxiaer Yalikun
- Laboratory for Integrated Biodevices, Quantitative Biology Center, RIKEN, Osaka 565-0871, Japan
| | - Sangwook Lee
- Department of Chemistry, University of Tokyo, Tokyo 113-0033, Japan
| | - Akihiro Isozaki
- Department of Chemistry, University of Tokyo, Tokyo 113-0033, Japan
| | - Ming Li
- Department of Bioengineering, Mechanical Engineering, and California NanoSystems Institute, University of California, Los Angeles, CA 90095, USA
| | - Yiyue Jiang
- Department of Chemistry, University of Tokyo, Tokyo 113-0033, Japan
| | - Atsushi Yasumoto
- Department of Clinical Laboratory Medicine, Graduate School of Medicine, The University of Tokyo, 113-8655, Japan
| | - Dino Di Carlo
- Department of Bioengineering, Mechanical Engineering, and California NanoSystems Institute, University of California, Los Angeles, CA 90095, USA
| | - Yo Tanaka
- Laboratory for Integrated Biodevices, Quantitative Biology Center, RIKEN, Osaka 565-0871, Japan
| | - Yutaka Yatomi
- Department of Clinical Laboratory Medicine, Graduate School of Medicine, The University of Tokyo, 113-8655, Japan
| | - Yasuyuki Ozeki
- Department of Electrical Engineering and Information Systems, University of Tokyo, Tokyo 113-8656, Japan
| | - Keisuke Goda
- Department of Chemistry, University of Tokyo, Tokyo 113-0033, Japan; Japan Science and Technology Agency, Kawaguchi 332-0012, Japan; Department of Electrical Engineering, University of California, Los Angeles, CA 90095, USA.
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