1
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Zhang LL, Zhong CB, Huang TJ, Zhang LM, Yan F, Ying YL. High-throughput single biomarker identification using droplet nanopore. Chem Sci 2024; 15:8355-8362. [PMID: 38846401 PMCID: PMC11151865 DOI: 10.1039/d3sc06795e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Accepted: 03/28/2024] [Indexed: 06/09/2024] Open
Abstract
Biomarkers are present in various metabolism processes, demanding precise and meticulous analysis at the single-molecule level for accurate clinical diagnosis. Given the need for high sensitivity, biological nanopore have been applied for single biomarker sensing. However, the detection of low-volume biomarkers poses challenges due to their low concentrations in dilute buffer solutions, as well as difficulty in parallel detection. Here, a droplet nanopore technique is developed for low-volume and high-throughput single biomarker detection at the sub-microliter scale, which shows a 2000-fold volume reduction compared to conventional setups. To prove the concept, this nanopore sensing platform not only enables multichannel recording but also significantly lowers the detection limit for various types of biomarkers such as angiotensin II, to 42 pg. This advancement enables direct biomarker detection at the picogram level. Such a leap forward in detection capability positions this nanopore sensing platform as a promising candidate for point-of-care testing of biomarker at single-molecule level, while substantially minimizing the need for sample dilution.
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Affiliation(s)
- Lin-Lin Zhang
- Molecular Sensing and Imaging Center, School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210023 P. R. China
| | - Cheng-Bing Zhong
- Molecular Sensing and Imaging Center, School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210023 P. R. China
| | - Ting-Jing Huang
- Molecular Sensing and Imaging Center, School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210023 P. R. China
| | - Li-Min Zhang
- School of Electronic Science and Engineering, Nanjing University Nanjing 210023 P. R. China
| | - Feng Yan
- School of Electronic Science and Engineering, Nanjing University Nanjing 210023 P. R. China
| | - Yi-Lun Ying
- Molecular Sensing and Imaging Center, School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210023 P. R. China
- State Key Laboratory of Analytical Chemistry for Life Science, Nanjing University Nanjing 210023 P. R. China
- Chemistry and Biomedicine Innovation Center, Nanjing University Nanjing 210023 P. R. China
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2
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Li NT, Wu NC, Cao R, Cadavid JL, Latour S, Lu X, Zhu Y, Mijalkovic M, Roozitalab R, Landon-Brace N, Notta F, McGuigan AP. An off-the-shelf multi-well scaffold-supported platform for tumour organoid-based tissues. Biomaterials 2022; 291:121883. [DOI: 10.1016/j.biomaterials.2022.121883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Revised: 10/07/2022] [Accepted: 10/23/2022] [Indexed: 11/15/2022]
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3
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Yang SM, Bi Q, Zhang WJ, Cui X, Zhou Y, Yuan C, Cui Y. Highly accurate multiprotein detection on a digital ELISA platform. LAB ON A CHIP 2022; 22:3015-3024. [PMID: 35791922 DOI: 10.1039/d2lc00388k] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The emerging single-molecule detection platform digital enzyme-linked immunosorbent assay (ELISA) can detect numerous proteins simultaneously at serum concentrations as low as picograms per milliliter. We sought to improve cytokine detection with this platform to aid diagnosis of conditions such as allergy and asthma. We developed a multiple single-molecule detection digital ELISA approach, through the application of encoded magnetic microbeads to simultaneously detect three cytokines in one serum sample. We tested the approach's utility to distinguish asthma-related cytokines in children. Concentrations of interleukin-4 (IL-4) and IL-6 were significantly higher in children with asthma than in healthy controls, while the concentration of interferon-γ (IFN-γ) was significantly lower. Our method has higher accuracy than conventional methods, and our results indicate that the proposed improved high-sensitivity digital ELISA-based diagnosis approach can facilitate early detection and treatment of childhood asthma or related diseases.
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Affiliation(s)
- Shih-Mo Yang
- School of Mechatronic Engineering and Automation of Shanghai University, No.99 at Shangda Road, Shanghai 200444, China
| | - Qingbo Bi
- School of Mechatronic Engineering and Automation of Shanghai University, No.99 at Shangda Road, Shanghai 200444, China
| | - Wen Jun Zhang
- Division of Biomedical Engineering of University of Saskatchewan, Saskatoon, SK S7N 5A9, Canada
| | - Xiaochuan Cui
- Department of General Medicine, The Affiliated Wuxi People's Hospital of Nanjing Medical University, Wuxi 214023, China
| | - Ying Zhou
- Department of Pediatrics Laboratory, The Affiliated Wuxi Children's Hospital of Nanjing Medical University, Wuxi 214023, China
| | - Cunyin Yuan
- Clinical Research Center, The Affiliated Wuxi People's Hospital of Nanjing Medical University, No.299 at Qingyang Road, Wuxi 214023, China.
| | - Yubao Cui
- Clinical Research Center, The Affiliated Wuxi People's Hospital of Nanjing Medical University, No.299 at Qingyang Road, Wuxi 214023, China.
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4
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Modeling-based design specifications for microfluidic gradients generators for biomedical applications. Biochem Eng J 2022. [DOI: 10.1016/j.bej.2022.108415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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5
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Murahara H, Kaji N, Tokeshi M, Baba Y. Enzyme kinetics in confined geometries at the single enzyme level. Analyst 2022; 147:1375-1384. [DOI: 10.1039/d1an02024b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Different confinement, femtoliter chambers and molecular crowders revealed the effects on the catalytic rates of β-galactosidase at the single molecule level.
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Affiliation(s)
- Hisashi Murahara
- Department of Biomolecular Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - Noritada Kaji
- Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
- Institute of Nano-Life-Systems, Institutes of Innovation for Future Society, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - Manabu Tokeshi
- Institute of Nano-Life-Systems, Institutes of Innovation for Future Society, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
- Division of Applied Chemistry, Faculty of Engineering, Hokkaido University, Kita-13, Nishi-8, Kita-Ku, Sapporo 060-8628, Japan
| | - Yoshinobu Baba
- Department of Biomolecular Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
- Institute of Nano-Life-Systems, Institutes of Innovation for Future Society, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
- Institute of Quantum Life Science, National Institutes for Quantum and Radiological Science and Technology, Chiba, 263-8555, Japan
- School of Pharmacy, College of Pharmacy, Kaohsiung Medical University, 100, Shih-Chuan 1st Rd., Kaohsiung, 807, Taiwan, Republic of China
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6
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Wang Y, Xu X, Chen X, Li J. Multifunctional Biomedical Materials Derived from Biological Membranes. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 34:e2107406. [PMID: 34739155 DOI: 10.1002/adma.202107406] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Revised: 10/24/2021] [Indexed: 02/06/2023]
Abstract
The delicate structure and fantastic functions of biological membranes are the successful evolutionary results of a long-term natural selection process. Their excellent biocompatibility and biofunctionality are widely utilized to construct multifunctional biomedical materials mainly by directly camouflaging materials with single or mixed biological membranes, decorating or incorporating materials with membrane-derived vesicles (e.g., exosomes), and designing multifunctional materials with the structure/functions of biological membranes. Here, the structure-function relationship of some important biological membranes and biomimetic membranes are discussed, such as various cell membranes, extracellular vesicles, and membranes from bacteria and organelles. Selected literature examples of multifunctional biomaterials derived from biological membranes for biomedical applications, such as drug- and gene-delivery systems, tissue-repair scaffolds, bioimaging, biosensors, and biological detection, are also highlighted. These designed materials show excellent properties, such as long circulation time, disease-targeted therapy, excellent biocompatibility, and selective recognition. Finally, perspectives and challenges associated with the clinical applications of biological-membrane-derived materials are discussed.
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Affiliation(s)
- Yuemin Wang
- College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu 610065 P. R. China
| | - Xinyuan Xu
- College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu 610065 P. R. China
| | - Xingyu Chen
- College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu 610065 P. R. China
- College of Medicine Southwest Jiaotong University Chengdu 610003 China
| | - Jianshu Li
- College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu 610065 P. R. China
- State Key Laboratory of Oral Diseases West China Hospital of Stomatology Med‐X Center for Materials Sichuan University Chengdu 610041 China
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7
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Chen Y, Shimoni O, Huang G, Wen S, Liao J, Duong HTT, Maddahfar M, Su QP, Ortega DG, Lu Y, Campbell DH, Walsh BJ, Jin D. Upconversion nanoparticle-assisted single-molecule assay for detecting circulating antigens of aggressive prostate cancer. Cytometry A 2021; 101:400-410. [PMID: 34585823 DOI: 10.1002/cyto.a.24504] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 09/06/2021] [Accepted: 09/20/2021] [Indexed: 01/22/2023]
Abstract
Sensitive and quantitative detection of molecular biomarkers is crucial for the early diagnosis of diseases like metabolic syndrome and cancer. Here we present a single-molecule sandwich immunoassay by imaging the number of single nanoparticles to diagnose aggressive prostate cancer. Our assay employed the photo-stable upconversion nanoparticles (UCNPs) as labels to detect the four types of circulating antigens in blood circulation, including glypican-1 (GPC-1), leptin, osteopontin (OPN), and vascular endothelial growth factor (VEGF), as their serum concentrations indicate aggressive prostate cancer. Under a wide-field microscope, a single UCNP doped with thousands of lanthanide ions can emit sufficiently bright anti-Stokes' luminescence to become quantitatively detectable. By counting every single streptavidin-functionalized UCNP which specifically labeled on each sandwich immune complex across multiple fields of views, we achieved the Limit of Detection (LOD) of 0.0123 ng/ml, 0.2711 ng/ml, 0.1238 ng/ml, and 0.0158 ng/ml for GPC-1, leptin, OPN and VEGF, respectively. The serum circulating level of GPC-1, leptin, OPN, and VEGF in a mixture of 10 healthy normal human serum was 25.17 ng/ml, 18.04 ng/ml, 11.34 ng/ml, and 1.55 ng/ml, which was within the assay dynamic detection range for each analyte. Moreover, a 20% increase of GPC-1 and OPN was observed by spiking the normal human serum with recombinant antigens to confirm the accuracy of the assay. We observed no cross-reactivity among the four biomarker analytes, which eliminates the false positives and enhances the detection accuracy. The developed single upconversion nanoparticle-assisted single-molecule assay suggests its potential in clinical usage for prostate cancer detection by monitoring tiny concentration differences in a panel of serum biomarkers.
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Affiliation(s)
- Yinghui Chen
- Institute for Biomedical Materials and Devices, School of Mathematical and Physical Sciences, Faculty of Science, University of Technology Sydney, New South Wales, Australia
- ARC Research Hub for Integrated Device for End-user Analysis at Low-levels (IDEAL), Faculty of Science, University of Technology Sydney, New South Wales, Australia
| | - Olga Shimoni
- Institute for Biomedical Materials and Devices, School of Mathematical and Physical Sciences, Faculty of Science, University of Technology Sydney, New South Wales, Australia
- ARC Research Hub for Integrated Device for End-user Analysis at Low-levels (IDEAL), Faculty of Science, University of Technology Sydney, New South Wales, Australia
| | - Guan Huang
- Institute for Biomedical Materials and Devices, School of Mathematical and Physical Sciences, Faculty of Science, University of Technology Sydney, New South Wales, Australia
| | - Shihui Wen
- Institute for Biomedical Materials and Devices, School of Mathematical and Physical Sciences, Faculty of Science, University of Technology Sydney, New South Wales, Australia
- ARC Research Hub for Integrated Device for End-user Analysis at Low-levels (IDEAL), Faculty of Science, University of Technology Sydney, New South Wales, Australia
| | - Jiayan Liao
- Institute for Biomedical Materials and Devices, School of Mathematical and Physical Sciences, Faculty of Science, University of Technology Sydney, New South Wales, Australia
- ARC Research Hub for Integrated Device for End-user Analysis at Low-levels (IDEAL), Faculty of Science, University of Technology Sydney, New South Wales, Australia
| | - Hien T T Duong
- The School of Pharmacy, The University of Sydney, New South Wales, Australia
| | - Mahnaz Maddahfar
- Institute for Biomedical Materials and Devices, School of Mathematical and Physical Sciences, Faculty of Science, University of Technology Sydney, New South Wales, Australia
| | - Qian Peter Su
- Institute for Biomedical Materials and Devices, School of Mathematical and Physical Sciences, Faculty of Science, University of Technology Sydney, New South Wales, Australia
| | - David Gallego Ortega
- ARC Research Hub for Integrated Device for End-user Analysis at Low-levels (IDEAL), Faculty of Science, University of Technology Sydney, New South Wales, Australia
- School of Biomedical Engineering, Faculty of Engineering and IT, University of Technology Sydney, Ultimo, New South Wales, Australia
| | - Yanling Lu
- ARC Research Hub for Integrated Device for End-user Analysis at Low-levels (IDEAL), Faculty of Science, University of Technology Sydney, New South Wales, Australia
- Minomic International Ltd, Macquarie Park, New South Wales, Australia
| | - Douglas H Campbell
- ARC Research Hub for Integrated Device for End-user Analysis at Low-levels (IDEAL), Faculty of Science, University of Technology Sydney, New South Wales, Australia
- Minomic International Ltd, Macquarie Park, New South Wales, Australia
| | - Bradley J Walsh
- ARC Research Hub for Integrated Device for End-user Analysis at Low-levels (IDEAL), Faculty of Science, University of Technology Sydney, New South Wales, Australia
- Minomic International Ltd, Macquarie Park, New South Wales, Australia
| | - Dayong Jin
- Institute for Biomedical Materials and Devices, School of Mathematical and Physical Sciences, Faculty of Science, University of Technology Sydney, New South Wales, Australia
- ARC Research Hub for Integrated Device for End-user Analysis at Low-levels (IDEAL), Faculty of Science, University of Technology Sydney, New South Wales, Australia
- UTS-SUStech Joint Research Centre for Biomedical Materials & Devices, Department of Biomedical Engineering, Southern University of Science and Technology, Shenzhen, China
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8
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Diederichs T, Tampé R. Membrane-Suspended Nanopores in Microchip Arrays for Stochastic Transport Recording and Sensing. FRONTIERS IN NANOTECHNOLOGY 2021. [DOI: 10.3389/fnano.2021.703673] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The transport of nutrients, xenobiotics, and signaling molecules across biological membranes is essential for life. As gatekeepers of cells, membrane proteins and nanopores are key targets in pharmaceutical research and industry. Multiple techniques help in elucidating, utilizing, or mimicking the function of biological membrane-embedded nanodevices. In particular, the use of DNA origami to construct simple nanopores based on the predictable folding of nucleotides provides a promising direction for innovative sensing and sequencing approaches. Knowledge of translocation characteristics is crucial to link structural design with function. Here, we summarize recent developments and compare features of membrane-embedded nanopores with solid-state analogues. We also describe how their translocation properties are characterized by microchip systems. The recently developed silicon chips, comprising solid-state nanopores of 80 nm connecting femtoliter cavities in combination with vesicle spreading and formation of nanopore-suspended membranes, will pave the way to characterize translocation properties of nanopores and membrane proteins in high-throughput and at single-transporter resolution.
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9
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Nguyen AV, Azizi M, Yaghoobi M, Dogan B, Zhang S, Simpson KW, Abbaspourrad A. Diffusion-Convection Hybrid Microfluidic Platform for Rapid Antibiotic Susceptibility Testing. Anal Chem 2021; 93:5789-5796. [PMID: 33788554 DOI: 10.1021/acs.analchem.0c05248] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Conventional antibiotic susceptibility testing (AST) assays such as broth microdilution and Kirby-Bauer disk diffusion are time-consuming (e.g., 24-72 h) and labor-intensive. Here, we present a microfluidic platform to perform AST assays with a broad range of antibiotic concentrations and controls. A culture medium stream was serially enriched with antibiotics along the length of the platform via diffusion and flow-directing mass convection mechanisms, generating a concentration gradient captured in a series of microchamber duplicates. We observed an agreement between the simulated and experimental concentration gradients and applicability to a variety of different molecules by changing the loading time according to a simple linear equation. The AST assay in our platform is based on bacterial metabolism, indicated by resazurin fluorescence. The small reaction volume enabled a minimum inhibitory concentration (MIC) to be determined in 4-5 h. Proof-of-concept functionality testing, using human isolates and clinically important antibiotics from different classes, indicated a high rate of agreement (94%: MIC within ±1 two-fold dilution of the reference method) of on-chip MICs and conventional broth microdilution. Overall, our results showed that this microfluidic platform is capable of determining antibiotic susceptibility in a rapid and reliable manner.
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Affiliation(s)
- Ann V Nguyen
- Department of Food Science, College of Agricultural and Life Sciences, Cornell University, Stocking Hall, Ithaca, New York 14853, United States
| | - Morteza Azizi
- Department of Food Science, College of Agricultural and Life Sciences, Cornell University, Stocking Hall, Ithaca, New York 14853, United States
| | - Mohammad Yaghoobi
- Department of Food Science, College of Agricultural and Life Sciences, Cornell University, Stocking Hall, Ithaca, New York 14853, United States
| | - Belgin Dogan
- Department of Clinical Sciences, College of Veterinary Medicine, Cornell University, 602 Tower Rd., Ithaca, New York 14853, United States
| | - Shiying Zhang
- Department of Clinical Sciences, College of Veterinary Medicine, Cornell University, 602 Tower Rd., Ithaca, New York 14853, United States
| | - Kenneth W Simpson
- Department of Clinical Sciences, College of Veterinary Medicine, Cornell University, 602 Tower Rd., Ithaca, New York 14853, United States
| | - Alireza Abbaspourrad
- Department of Food Science, College of Agricultural and Life Sciences, Cornell University, Stocking Hall, Ithaca, New York 14853, United States
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10
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Berlanda SF, Breitfeld M, Dietsche CL, Dittrich PS. Recent Advances in Microfluidic Technology for Bioanalysis and Diagnostics. Anal Chem 2020; 93:311-331. [DOI: 10.1021/acs.analchem.0c04366] [Citation(s) in RCA: 64] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Simon F. Berlanda
- Department of Biosystems Science and Engineering, ETH Zurich, CH-8093 Zurich, Switzerland
| | - Maximilian Breitfeld
- Department of Biosystems Science and Engineering, ETH Zurich, CH-8093 Zurich, Switzerland
| | - Claudius L. Dietsche
- Department of Biosystems Science and Engineering, ETH Zurich, CH-8093 Zurich, Switzerland
| | - Petra S. Dittrich
- Department of Biosystems Science and Engineering, ETH Zurich, CH-8093 Zurich, Switzerland
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11
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Kumar G, Bossert H, McDonald D, Chatzidimitriou A, Ardagh MA, Pang Y, Lee C, Tsapatsis M, Abdelrahman OA, Dauenhauer PJ. Catalysis-in-a-Box: Robotic Screening of Catalytic Materials in the Time of COVID-19 and Beyond. MATTER 2020; 3:805-823. [PMID: 32838298 PMCID: PMC7351032 DOI: 10.1016/j.matt.2020.06.025] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 06/02/2020] [Accepted: 06/17/2020] [Indexed: 05/16/2023]
Abstract
This work describes the design and implementation of an automated device for catalytic materials testing by direct modifications to a gas chromatograph (GC). The setup can be operated as a plug-flow isothermal reactor and enables the control of relevant parameters such as reaction temperature and reactant partial pressures directly from the GC. High-quality kinetic data (including reaction rates, product distributions, and activation barriers) can be obtained at almost one-tenth of the fabrication cost of analogous commercial setups. With these key benefits including automation, low cost, and limited experimental equipment instrumentation, this implementation is intended as a high-throughput catalyst screening reactor that can be readily utilized by materials synthesis researchers to assess the catalytic properties of their synthesized structures in vapor-phase chemistries.
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Affiliation(s)
- Gaurav Kumar
- University of Minnesota, Department of Chemical Engineering and Materials Science, 421 Washington Avenue SE, Minneapolis, MN 55455, USA
| | - Hannah Bossert
- University of Minnesota, Department of Chemical Engineering and Materials Science, 421 Washington Avenue SE, Minneapolis, MN 55455, USA
| | - Dan McDonald
- University of Minnesota, Department of Chemical Engineering and Materials Science, 421 Washington Avenue SE, Minneapolis, MN 55455, USA
| | - Anargyros Chatzidimitriou
- University of Minnesota, Department of Chemical Engineering and Materials Science, 421 Washington Avenue SE, Minneapolis, MN 55455, USA
| | - M Alexander Ardagh
- University of Minnesota, Department of Chemical Engineering and Materials Science, 421 Washington Avenue SE, Minneapolis, MN 55455, USA
- Catalysis Center for Energy Innovation, University of Delaware, 150 Academy Street, Newark, DE 19716, USA
| | - Yutong Pang
- University of Minnesota, Department of Chemical Engineering and Materials Science, 421 Washington Avenue SE, Minneapolis, MN 55455, USA
| | - ChoongSze Lee
- University of Minnesota, Department of Chemical Engineering and Materials Science, 421 Washington Avenue SE, Minneapolis, MN 55455, USA
- Catalysis Center for Energy Innovation, University of Delaware, 150 Academy Street, Newark, DE 19716, USA
| | - Michael Tsapatsis
- Department of Chemical and Biomolecular Engineering & Institute for NanoBioTechnology, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218, USA
- Johns Hopkins University, Applied Physics Laboratory, 11100 Johns Hopkins Road, Laurel, MD 20723, USA
- Catalysis Center for Energy Innovation, University of Delaware, 150 Academy Street, Newark, DE 19716, USA
| | - Omar A Abdelrahman
- Department of Chemical Engineering, University of Massachusetts Amherst, 686 North Pleasant Street, Amherst, MA 01003, USA
- Catalysis Center for Energy Innovation, University of Delaware, 150 Academy Street, Newark, DE 19716, USA
| | - Paul J Dauenhauer
- University of Minnesota, Department of Chemical Engineering and Materials Science, 421 Washington Avenue SE, Minneapolis, MN 55455, USA
- Catalysis Center for Energy Innovation, University of Delaware, 150 Academy Street, Newark, DE 19716, USA
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12
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Last MG, Deshpande S, Dekker C. pH-Controlled Coacervate-Membrane Interactions within Liposomes. ACS NANO 2020; 14:4487-4498. [PMID: 32239914 PMCID: PMC7199211 DOI: 10.1021/acsnano.9b10167] [Citation(s) in RCA: 74] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Accepted: 04/02/2020] [Indexed: 05/19/2023]
Abstract
Membraneless organelles formed by liquid-liquid phase separation are dynamic structures that are employed by cells to spatiotemporally regulate their interior. Indeed, complex coacervation-based phase separation is involved in a multitude of biological tasks ranging from photosynthesis to cell division to chromatin organization, and more. Here, we use an on-chip microfluidic method to control and study the formation of membraneless organelles within liposomes, using pH as the main control parameter. We show that a transmembrane proton flux that is created by a stepwise change in the external pH can readily bring about the coacervation of encapsulated components in a controlled manner. We employ this strategy to induce and study electrostatic as well as hydrophobic interactions between the coacervate and the lipid membrane. Electrostatic interactions using charged lipids efficiently recruit coacervates to the membrane and restrict their movement along the inner leaflet. Hydrophobic interactions via cholesterol-tagged RNA molecules provide even stronger interactions, causing coacervates to wet the membrane and affect the local lipid-membrane structure, reminiscent of coacervate-membrane interactions in cells. The presented technique of pH-triggered coacervation within cell-sized liposomes may find applications in synthetic cells and in studying biologically relevant phase separation reactions in a bottom-up manner.
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Affiliation(s)
- Mart G.
F. Last
- Department
of Bionanoscience, Kavli Institute of Nanoscience Delft, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands
| | - Siddharth Deshpande
- Department
of Bionanoscience, Kavli Institute of Nanoscience Delft, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands
- Physical
Chemistry and Soft Matter, Wageningen University
and Research, Stippenweg 4, 6708 WE Wageningen, The Netherlands
| | - Cees Dekker
- Department
of Bionanoscience, Kavli Institute of Nanoscience Delft, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands
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13
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Emerging isothermal amplification technologies for microRNA biosensing: Applications to liquid biopsies. Mol Aspects Med 2020; 72:100832. [DOI: 10.1016/j.mam.2019.11.002] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2019] [Revised: 11/06/2019] [Accepted: 11/10/2019] [Indexed: 02/07/2023]
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14
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Komatsu T, Urano Y. Chemical toolbox for 'live' biochemistry to understand enzymatic functions in living systems. J Biochem 2020; 167:139-149. [PMID: 31553443 DOI: 10.1093/jb/mvz074] [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: 07/29/2019] [Accepted: 08/30/2019] [Indexed: 11/12/2022] Open
Abstract
In this review, we present an overview of the recent advances in chemical toolboxes that are used to provide insights into 'live' protein functions in living systems. Protein functions are mediated by various factors inside of cells, such as protein-protein interactions, posttranslational modifications, and they are also subject to environmental factors such as pH, redox states and crowding conditions. Obtaining a true understanding of protein functions in living systems is therefore a considerably difficult task. Recent advances in research tools have allowed us to consider 'live' biochemistry as a valid approach to precisely understand how proteins function in a live cell context.
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Affiliation(s)
- Toru Komatsu
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Yasuteru Urano
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.,Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.,Core Research for Evolutional Science and Technology (CREST) Investigator, Japan Agency for Medical Research and Development (AMED), 1-7-1 Otemachi, Chiyoda-ku, Tokyo 100-0004, Japan
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15
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Watanabe R. Microsystem for the single molecule analysis of membrane transport proteins. Biochim Biophys Acta Gen Subj 2019; 1864:129330. [PMID: 30926442 DOI: 10.1016/j.bbagen.2019.03.016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2018] [Revised: 03/19/2019] [Accepted: 03/22/2019] [Indexed: 12/31/2022]
Abstract
Micro-chamber arrays enable highly sensitive and quantitative bioassays at the single-molecule level. Accordingly, they are widely used for ultra-sensitive biomedical applications, e.g., digital PCR and digital ELISA. However, the versatility of micro-chambers is generally limited to reactions in aqueous solutions, although various functions of membrane proteins are extremely important. To address this issue, microsystems using arrayed micro-sized chambers sealed with lipid bilayers, referred to here as a "biomembrane microsystems", have been developed by many research groups for the analysis of membrane proteins. In this review, I would like to introduce recent progress on the single molecule analysis of membrane transport proteins using a biomembrane microsystem, and discuss the future prospects for its use in analytical and pharmacological applications.
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