1
|
Rocha RA, Esquirol L, Rolland V, Hands P, Speight RE, Scott C. Non-covalent binding tags for batch and flow biocatalysis. Enzyme Microb Technol 2023; 169:110268. [PMID: 37300919 DOI: 10.1016/j.enzmictec.2023.110268] [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: 01/26/2023] [Revised: 05/31/2023] [Accepted: 06/02/2023] [Indexed: 06/12/2023]
Abstract
Enzyme immobilization offers considerable advantage for biocatalysis in batch and continuous flow reactions. However, many currently available immobilization methods require that the surface of the carrier is chemically modified to allow site specific interactions with their cognate enzymes, which requires specific processing steps and incurs associated costs. Two carriers (cellulose and silica) were investigated here, initially using fluorescent proteins as models to study binding, followed by assessment of industrially relevant enzyme performance (transaminases and an imine reductase/glucose oxidoreductase fusion). Two previously described binding tags, the 17 amino acid long silica-binding peptide from the Bacillus cereus CotB protein and the cellulose binding domain from the Clostridium thermocellum, were fused to a range of proteins without impairing their heterologous expression. When fused to a fluorescent protein both tags conferred high avidity specific binding with their respective carriers (low nanomolar Kd values). The CotB peptide (CotB1p) induced protein aggregation in the transaminase and imine reductase/glucose oxidoreductase fusions when incubated with the silica carrier. The Clostridium thermocellum cellulose binding domain (CBDclos) allowed immobilization of all the proteins tested, but immobilization led to loss of enzymatic activity in the transaminases (< 2-fold) and imine reductase/glucose oxidoreductase fusion (> 80%). A transaminase-CBDclos fusion was then successfully used to demonstrate the application of the binding tag in repetitive batch and a continuous-flow reactor.
Collapse
Affiliation(s)
- Raquel A Rocha
- School of Biology and Environmental Science, Faculty of Science, Queensland University of Technology (QUT), Brisbane, Qld 4000, Australia; CSIRO Environment, Black Mountain Science and Innovation Park, Canberra, ACT 2601, Australia
| | - Lygie Esquirol
- CSIRO Environment, Black Mountain Science and Innovation Park, Canberra, ACT 2601, Australia
| | - Vivien Rolland
- CSIRO Agriculture and Food, Black Mountain Science and Innovation Park, Canberra, ACT 2601, Australia
| | - Philip Hands
- CSIRO Agriculture and Food, Black Mountain Science and Innovation Park, Canberra, ACT 2601, Australia
| | - Robert E Speight
- School of Biology and Environmental Science, Faculty of Science, Queensland University of Technology (QUT), Brisbane, Qld 4000, Australia; ARC Centre of Excellence in Synthetic Biology, Queensland University of Technology (QUT), Brisbane, Qld 4000, Australia
| | - Colin Scott
- CSIRO Environment, Black Mountain Science and Innovation Park, Canberra, ACT 2601, Australia.
| |
Collapse
|
2
|
Li L, Wu E, Jia K, Yang K. Temperature field regulation of a droplet using an acoustothermal heater. LAB ON A CHIP 2021; 21:3184-3194. [PMID: 34195725 DOI: 10.1039/d1lc00267h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Heating a droplet without contamination is desired for the emerging applications of microfluidic devices in life science and materials science, especially in the form of controllable temperature distribution. Microfluidic heaters using surface acoustic waves have been recently demonstrated, which highlights an urgent need for an insight into the detailed heating mechanism to guide the development of temperature regulation methodologies. Here, we show that the temperature field of a droplet on the path of a travelling wave can be regulated by modulating the heat source distribution and thermal conduction inside the target. We model the acoustothermal process of the droplet including the effects of electric dissipation, acoustic dissipation, and acoustic-induced steady flow. The electric-mechanical-acoustic coupling contributes to the dominant heat source, and we call it acoustic heat source. The nonlinear effects of incident waves generate acoustic vortexes with a velocity of up to 20 mm s-1, inducing forced convection inside the droplet to enhance heat transfer. The equilibrium temperature field of a droplet is determined by a synergy of dissipative acoustic attenuation and acoustic streaming. We demonstrate that the distribution of the acoustic heat source and the patterns of acoustic streaming can be modulated by fluid viscosity and droplet size. Various spatial combinations of the acoustic heat source and steady streaming make different temperature fields in the droplet. We also propose a phase diagram of the temperature distribution in the droplet. This methodology enables opportunities for temperature-related processing inside a droplet bioparticle carrier or microreactor.
Collapse
Affiliation(s)
- Liqiang Li
- State Key Laboratory of Fluid Power and Mechatronic Systems, School of Mechanical Engineering, Zhejiang University, No. 38 Zheda Road, Hangzhou, 310027, P. R. China
| | - Eryong Wu
- State Key Laboratory of Fluid Power and Mechatronic Systems, School of Mechanical Engineering, Zhejiang University, No. 38 Zheda Road, Hangzhou, 310027, P. R. China
| | - Kun Jia
- State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace, Xi'an Jiaotong University, No. 28 West Xianning Road, 710049, Xi'an, P. R. China.
| | - Keji Yang
- State Key Laboratory of Fluid Power and Mechatronic Systems, School of Mechanical Engineering, Zhejiang University, No. 38 Zheda Road, Hangzhou, 310027, P. R. China
| |
Collapse
|
3
|
Dwyer J, Ramirez MD, Katz PS, Karlstrom RO, Bergan J. Accelerated clearing and molecular labeling of biological tissues using magnetohydrodynamic force. Sci Rep 2021; 11:16462. [PMID: 34385489 PMCID: PMC8360944 DOI: 10.1038/s41598-021-95692-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2021] [Accepted: 07/22/2021] [Indexed: 11/09/2022] Open
Abstract
Techniques used to clear biological tissue for fluorescence microscopy are essential to connect anatomical principles at levels ranging from subcellular to the whole animal. Here we report a simple and straightforward approach to efficiently render opaque tissue samples transparent and show that this approach can be modified to rapidly label intact tissue samples with antibodies for large volume fluorescence microscopy. This strategy applies a magnetohydrodynamic (MHD) force to accelerate the removal of lipids from tissue samples at least as large as an intact adult mouse brain. We also show that MHD force can be used to accelerate antibody penetration into tissue samples. This strategy complements a growing array of tools that enable high-resolution 3-dimensional anatomical analyses in intact tissues using fluorescence microscopy. MHD-accelerated clearing is simple, fast, reliable, inexpensive, provides good thermal regulation, and is compatible with existing strategies for high-quality fluorescence microscopy of intact tissues.
Collapse
Affiliation(s)
- Joseph Dwyer
- Neuroscience and Behavior Graduate Program, University of Massachusetts Amherst, Amherst, USA
| | - M Desmond Ramirez
- Department of Biology, University of Massachusetts Amherst, Amherst, USA
| | - Paul S Katz
- Neuroscience and Behavior Graduate Program, University of Massachusetts Amherst, Amherst, USA.,Department of Biology, University of Massachusetts Amherst, Amherst, USA
| | - Rolf O Karlstrom
- Neuroscience and Behavior Graduate Program, University of Massachusetts Amherst, Amherst, USA.,Department of Biology, University of Massachusetts Amherst, Amherst, USA
| | - Joseph Bergan
- Neuroscience and Behavior Graduate Program, University of Massachusetts Amherst, Amherst, USA. .,Department of Psychological and Brain Sciences, University of Massachusetts Amherst, Amherst, USA.
| |
Collapse
|
4
|
Abstract
Long-term holding and precise handling of growing plant tissues during in vitro cultivation has been a major hurdle for experimental studies related to plant development and reproduction. In the present review, we introduce two of our newly developed poly(dimethylsiloxane)-based microdevices: a T-shaped microchannel device for pollen tube chemoattraction and a microcage array for long-term live imaging of ovules. Their design, usage and advantages are described, and future prospects of experimental approaches to plant reproduction using such microdevices are discussed.
Collapse
|
5
|
Boybay MS, Jiao A, Glawdel T, Ren CL. Microwave sensing and heating of individual droplets in microfluidic devices. LAB ON A CHIP 2013; 13:3840-6. [PMID: 23896699 DOI: 10.1039/c3lc50418b] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Droplet-based microfluidics is an emerging high-throughput screening technology finding applications in a variety of areas such as life science research, drug discovery and material synthesis. In this paper we present a cost-effective, scalable microwave system that can be integrated with microfluidic devices enabling remote, simultaneous sensing and heating of individual nanoliter-sized droplets generated in microchannels. The key component of this microwave system is an electrically small resonator that is able to distinguish between materials with different electrical properties (i.e. permittivity, conductivity). The change in these properties causes a shift in the operating frequency of the resonator, which can be used for sensing purposes. Alternatively, if microwave power is delivered to the sensing region at the frequency associated with a particular material (i.e. droplet), then only this material receives the power while passing the resonator leaving the surrounding materials (i.e. carrier fluid and chip material) unaffected. Therefore this method allows sensing and heating of individual droplets to be inherently synchronized, eliminating the need for external triggers. We confirmed the performance of the sensor by applying it to differentiate between various dairy fluids, identify salt solutions and detect water droplets with different glycerol concentrations. We experimentally verified that this system can increase the droplet temperature from room temperature by 42 °C within 5.62 ms with an input power of 27 dBm. Finally we employed this system to thermally initiate the formation of hydrogel particles out of the droplets that are being heated by this system.
Collapse
Affiliation(s)
- Muhammed S Boybay
- Department of Computer Engineering, Antalya International University, Universite Caddesi No:2, 07190 Antalya, Turkey
| | | | | | | |
Collapse
|
6
|
You I, Kang SM, Lee S, Cho YO, Kim JB, Lee SB, Nam YS, Lee H. Polydopamine Microfluidic System toward a Two-Dimensional, Gravity-Driven Mixing Device. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201200329] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
7
|
You I, Kang SM, Lee S, Cho YO, Kim JB, Lee SB, Nam YS, Lee H. Polydopamine Microfluidic System toward a Two-Dimensional, Gravity-Driven Mixing Device. Angew Chem Int Ed Engl 2012; 51:6126-30. [DOI: 10.1002/anie.201200329] [Citation(s) in RCA: 114] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2012] [Revised: 02/22/2012] [Indexed: 11/09/2022]
|
8
|
Aigouy L, Lalouat L, Mortier M, Löw P, Bergaud C. Note: A scanning thermal probe microscope that operates in liquids. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2011; 82:036106. [PMID: 21456808 DOI: 10.1063/1.3567794] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We have developed a scanning thermal probe microscope that operates in liquid environments. The thermal sensor is a fluorescent particle glued at the end of a sharp tungsten tip. Since light emission is a strongly thermally sensitive effect, the measurement of the particle fluorescence variations allows the determination of the temperature. No electrical wiring of the probe is needed. As a demonstrative example, we have measured the temperature map of a Joule-heated microheater immersed in a water∕glycerol solution. Both topographical and thermal images are obtained with a good sensitivity.
Collapse
Affiliation(s)
- Lionel Aigouy
- Laboratoire de Physique et d'Etude des Matériaux, UMR CNRS 8213, ESPCI, 10 rue Vauquelin, 75231 Paris Cedex 5, France.
| | | | | | | | | |
Collapse
|
9
|
Yamanishi Y, Teramoto J, Magariyama Y, Ishihama A, Fukuda T, Arai F. On-chip Cell Immobilization and Monitoring System Using Thermosensitive Gel Controlled by Suspended Polymeric Microbridge. IEEE Trans Nanobioscience 2009; 8:312-7. [DOI: 10.1109/tnb.2009.2035273] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
10
|
Arata HF, Gillot F, Collard D, Fujita H. Millisecond analysis of double stranded DNA with fluorescent intercalator by micro-thermocontrol-device. Talanta 2009; 79:963-6. [DOI: 10.1016/j.talanta.2009.04.045] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2009] [Revised: 04/15/2009] [Accepted: 04/16/2009] [Indexed: 10/20/2022]
|
11
|
Issadore D, Humphry KJ, Brown KA, Sandberg L, Weitz D, Westervelt RM. Microwave dielectric heating of drops in microfluidic devices. LAB ON A CHIP 2009; 9:1701-6. [PMID: 19495453 PMCID: PMC2892413 DOI: 10.1039/b822357b] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
We present a technique to locally and rapidly heat water drops in microfluidic devices with microwave dielectric heating. Water absorbs microwave power more efficiently than polymers, glass, and oils due to its permanent molecular dipole moment that has large dielectric loss at GHz frequencies. The relevant heat capacity of the system is a single thermally isolated picolitre-scale drop of water, enabling very fast thermal cycling. We demonstrate microwave dielectric heating in a microfluidic device that integrates a flow-focusing drop maker, drop splitters, and metal electrodes to locally deliver microwave power from an inexpensive, commercially available 3.0 GHz source and amplifier. The temperature change of the drops is measured by observing the temperature dependent fluorescence intensity of cadmium selenide nanocrystals suspended in the water drops. We demonstrate characteristic heating times as short as 15 ms to steady-state temperature changes as large as 30 degrees C above the base temperature of the microfluidic device. Many common biological and chemical applications require rapid and local control of temperature and can benefit from this new technique.
Collapse
Affiliation(s)
- David Issadore
- School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA
| | | | - Keith A. Brown
- School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA
| | - Lori Sandberg
- College of Engineering and Applied Sciences, University of Wyoming, Laramie, WY 82071, USA
| | - David Weitz
- School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA
- Department of Physics, Harvard University, Cambridge, MA 02138, USA
| | - Robert M. Westervelt
- School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA
- Department of Physics, Harvard University, Cambridge, MA 02138, USA
| |
Collapse
|
12
|
Arata HF, Fujita H. Miniaturized thermocontrol devices enable analysis of biomolecular behavior on their timescales, second to millisecond. Integr Biol (Camb) 2009; 1:363-70. [PMID: 20023743 DOI: 10.1039/b901902b] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
To establish general-purpose methods and tools for biological experiments on a short time scale is an essential requirement for future research in molecular biology because most of the functions of living organisms at the molecular level take place on a time scale from 1-second to millisecond. Thermal control with on-chip micro-thermodevices is one of the strongest and most useful ways to realize biological experiments at molecular level on these time scales. Novel biological phenomena revealed by the experiments using micro-thermodevices on a 1-second and millisecond time scale will be shown for the proof. Finally, the advantages and impact of this methodology in molecular biology will be discussed.
Collapse
Affiliation(s)
- Hideyuki F Arata
- Institute of Industrial Science, The University of Tokyo, Tokyo, Japan.
| | | |
Collapse
|
13
|
Gong X, Wen W. Polydimethylsiloxane-based conducting composites and their applications in microfluidic chip fabrication. BIOMICROFLUIDICS 2009; 3:12007. [PMID: 19693388 PMCID: PMC2717593 DOI: 10.1063/1.3098963] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2009] [Accepted: 02/23/2009] [Indexed: 05/06/2023]
Abstract
This paper reviews the design and fabrication of polydimethylsiloxane (PDMS)-based conducting composites and their applications in microfluidic chip fabrication. Owing to their good electrical conductivity and rubberlike elastic characteristics, these composites can be used variously in soft-touch electronic packaging, planar and three-dimensional electronic circuits, and in-chip electrodes. Several microfluidic components fabricated with PDMS-based composites have been introduced, including a microfluidic mixer, a microheater, a micropump, a microdroplet controller, as well as an all-in-one microfluidic chip.
Collapse
Affiliation(s)
- Xiuqing Gong
- Department of Physics and Joint KAUST-HKUST MicroNano-Fluidics Laboratory,Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | | |
Collapse
|
14
|
Saïdi E, Samson B, Aigouy L, Volz S, Löw P, Bergaud C, Mortier M. Scanning thermal imaging by near-field fluorescence spectroscopy. NANOTECHNOLOGY 2009; 20:115703. [PMID: 19420451 DOI: 10.1088/0957-4484/20/11/115703] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
A scanning thermal microscope that uses a fluorescent particle as a temperature probe has been developed. The particle, made of a rare-earth ion-doped fluoride glass, is glued at the extremity of a sharp tungsten tip and scanned on the surface of an electronic device. The temperature of the device is determined by measuring the fluorescence spectrum of the particle at every point on the surface and by comparing the intensity variations of two emission lines. As an example, we will show some images obtained on a nickel stripe 1 microm wide, heated by an electrical current. A good agreement is observed with a simulation of the temperature field on the device.
Collapse
Affiliation(s)
- Elika Saïdi
- Laboratoire Photons et Matière, UPR CNRS 5, ESPCI, Paris, France
| | | | | | | | | | | | | |
Collapse
|