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Wang S, Li Y, Wang Y, Huang J, Cai Z, Huang X. In vitro effect of Er: YAG laser irradiation in caries cavity preparation on biobehaviors of adjacent human dental pulp cells in the pulp chamber. JOURNAL OF BIOPHOTONICS 2024; 17:e202300332. [PMID: 38041248 DOI: 10.1002/jbio.202300332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2023] [Revised: 11/20/2023] [Accepted: 11/20/2023] [Indexed: 12/03/2023]
Abstract
The erbium-doped yttrium aluminum garnet (Er: YAG) laser has been successfully applied in caries removal; however, little is known about proper parameters of Er: YAG laser on different conditions of caries removal, especially the influence of Er: YAG irradiation on human dental pulp cells (hDPCs). Here, we tested the effects of Er: YAG laser at different output energy levels (100, 200, 300, 400, and 500 mJ) on biobehaviors of hDPCs. To simulate clinical deep caries conditions, hDPCs were cultured on the pulpal side of 500-μm-thick dentin disks in an in vitro pulp chamber model. Temperature change, structural change, and ablation depth of dentin disk were also recorded. The findings suggested that the biological behaviors of hDPCs are strongly correlated with the energy output of the Er: YAG laser. Er: YAG laser irradiation at 100 mJ may be proper and safe for deep caries removal since it would not cause any adverse effect on hDPCs biobehaviors.
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Affiliation(s)
- Shaofeng Wang
- Fujian Key Laboratory of Oral Diseases & Fujian Provincial Engineering Research Center of Oral Biomaterial & Stomatological Key lab of Fujian College and University, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China
| | - Yijun Li
- Fujian Key Laboratory of Oral Diseases & Fujian Provincial Engineering Research Center of Oral Biomaterial & Stomatological Key lab of Fujian College and University, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China
- Stomatological Hospital of Xiamen Medical College & Xiamen Key Laboratory of Stomatological Disease Diagnosis and Treatment, Xiamen, China
| | - Yanhuang Wang
- Fujian Key Laboratory of Oral Diseases & Fujian Provincial Engineering Research Center of Oral Biomaterial & Stomatological Key lab of Fujian College and University, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China
| | - Jing Huang
- Fujian Key Laboratory of Oral Diseases & Fujian Provincial Engineering Research Center of Oral Biomaterial & Stomatological Key lab of Fujian College and University, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China
| | - Zhiyu Cai
- Department of Stomatology, Fujian Medical University Union Hospital, Fuzhou, China
| | - Xiaojing Huang
- Fujian Key Laboratory of Oral Diseases & Fujian Provincial Engineering Research Center of Oral Biomaterial & Stomatological Key lab of Fujian College and University, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China
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2
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Zhang KS, Nadkarni AV, Paul R, Martin AM, Tang SKY. Microfluidic Surgery in Single Cells and Multicellular Systems. Chem Rev 2022; 122:7097-7141. [PMID: 35049287 DOI: 10.1021/acs.chemrev.1c00616] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Microscale surgery on single cells and small organisms has enabled major advances in fundamental biology and in engineering biological systems. Examples of applications range from wound healing and regeneration studies to the generation of hybridoma to produce monoclonal antibodies. Even today, these surgical operations are often performed manually, but they are labor intensive and lack reproducibility. Microfluidics has emerged as a powerful technology to control and manipulate cells and multicellular systems at the micro- and nanoscale with high precision. Here, we review the physical and chemical mechanisms of microscale surgery and the corresponding design principles, applications, and implementations in microfluidic systems. We consider four types of surgical operations: (1) sectioning, which splits a biological entity into multiple parts, (2) ablation, which destroys part of an entity, (3) biopsy, which extracts materials from within a living cell, and (4) fusion, which joins multiple entities into one. For each type of surgery, we summarize the motivating applications and the microfluidic devices developed. Throughout this review, we highlight existing challenges and opportunities. We hope that this review will inspire scientists and engineers to continue to explore and improve microfluidic surgical methods.
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Affiliation(s)
- Kevin S Zhang
- Department of Mechanical Engineering, Stanford University, Stanford, California 94305, United States
| | - Ambika V Nadkarni
- Department of Mechanical Engineering, Stanford University, Stanford, California 94305, United States.,Department of Biochemistry and Biophysics, University of California San Francisco, San Francisco, California 94158, United States
| | - Rajorshi Paul
- Department of Mechanical Engineering, Stanford University, Stanford, California 94305, United States
| | - Adrian M Martin
- Department of Mechanical Engineering, Stanford University, Stanford, California 94305, United States
| | - Sindy K Y Tang
- Department of Mechanical Engineering, Stanford University, Stanford, California 94305, United States
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3
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WILSON BRYCEG, FAN ZHENKUN, SREEDASYAM RAHUL, BOTVINICK ELLIOT, VENUGOPALAN VASAN. Single-shot interferometric measurement of cavitation bubble dynamics. OPTICS LETTERS 2021; 46:1409-1412. [PMID: 33720199 PMCID: PMC9233925 DOI: 10.1364/ol.416923] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Accepted: 02/12/2021] [Indexed: 06/02/2023]
Abstract
We demonstrate an interferometric method to provide direct, single-shot measurements of cavitation bubble dynamics with nanoscale spatial and temporal resolution with results that closely match theoretical predictions. Implementation of this method reduces the need for expensive and complex ultra-high speed camera systems for the measurement of single cavitation events. This method can capture dynamics over large time intervals with sub-nanosecond temporal resolution and spatial precision surpassing the optical diffraction limit. We expect this method to have broad utility for examination of cavitation bubble dynamics, as well as for metrology applications such as optorheological materials characterization. This method provides an accurate approach for precise measurement of cavitation bubble dynamics suitable for metrology applications such as optorheological materials characterization.
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Affiliation(s)
- BRYCE G. WILSON
- Department of Chemical and Biomolecular Engineering,
University of California, Irvine, CA 92697-2580
| | - ZHENKUN FAN
- Department of Chemical and Biomolecular Engineering,
University of California, Irvine, CA 92697-2580
| | - RAHUL SREEDASYAM
- Department of Biomedical Engineering University of
California, Irvine, CA 92697-2715
| | - ELLIOT BOTVINICK
- Department of Biomedical Engineering University of
California, Irvine, CA 92697-2715
- Beckman Laser Institute and Medical Clinic, 1002 Health
Sciences Rd E, University of California, Irvine, CA 92697-3010
| | - VASAN VENUGOPALAN
- Department of Chemical and Biomolecular Engineering,
University of California, Irvine, CA 92697-2580
- Department of Biomedical Engineering University of
California, Irvine, CA 92697-2715
- Beckman Laser Institute and Medical Clinic, 1002 Health
Sciences Rd E, University of California, Irvine, CA 92697-3010
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4
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Luo JC, Ching H, Wilson BG, Mohraz A, Botvinick EL, Venugopalan V. Laser cavitation rheology for measurement of elastic moduli and failure strain within hydrogels. Sci Rep 2020; 10:13144. [PMID: 32753667 PMCID: PMC7403306 DOI: 10.1038/s41598-020-68621-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Accepted: 06/12/2020] [Indexed: 01/26/2023] Open
Abstract
We introduce laser cavitation rheology (LCR) as a minimally-invasive optical method to characterize mechanical properties within the interior of biological and synthetic aqueous soft materials at high strain-rates. We utilized time-resolved photography to measure cavitation bubble dynamics generated by the delivery of focused 500 ps duration laser radiation at λ = 532 nm within fibrin hydrogels at pulse energies of Ep = 12, 18 µJ and within polyethylene glycol (600) diacrylate (PEG (600) DA) hydrogels at Ep = 2, 5, 12 µJ. Elastic moduli and failure strains of fibrin and PEG (600) DA hydrogels were calculated from these measurements by determining parameter values which provide the best fit of the measured data to a theoretical model of cavitation bubble dynamics in a Neo-Hookean viscoelastic medium subject to material failure. We demonstrate the use of this method to retrieve the local, interior elastic modulus of these hydrogels and both the radial and circumferential failure strains.
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Affiliation(s)
- Justin C Luo
- Department of Biomedical Engineering, University of California, Irvine, Irvine, CA, 92697-2715, USA
- Beckman Laser Institute & Medical Clinic, University of California, Irvine, CA, 92697-2575, USA
- Department of Biomedical Engineering, Cornell University, Ithaca, NY, USA
| | - Herman Ching
- Department of Chemical and Biomolecular Engineering, University of California, Irvine, 916 Engineering Tower, Irvine, CA, 92697-2580, USA
| | - Bryce G Wilson
- Beckman Laser Institute & Medical Clinic, University of California, Irvine, CA, 92697-2575, USA
- Department of Chemical and Biomolecular Engineering, University of California, Irvine, 916 Engineering Tower, Irvine, CA, 92697-2580, USA
| | - Ali Mohraz
- Department of Chemical and Biomolecular Engineering, University of California, Irvine, 916 Engineering Tower, Irvine, CA, 92697-2580, USA
| | - Elliot L Botvinick
- Department of Biomedical Engineering, University of California, Irvine, Irvine, CA, 92697-2715, USA
- Beckman Laser Institute & Medical Clinic, University of California, Irvine, CA, 92697-2575, USA
| | - Vasan Venugopalan
- Department of Biomedical Engineering, University of California, Irvine, Irvine, CA, 92697-2715, USA.
- Beckman Laser Institute & Medical Clinic, University of California, Irvine, CA, 92697-2575, USA.
- Department of Chemical and Biomolecular Engineering, University of California, Irvine, 916 Engineering Tower, Irvine, CA, 92697-2580, USA.
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5
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Stewart MP, Langer R, Jensen KF. Intracellular Delivery by Membrane Disruption: Mechanisms, Strategies, and Concepts. Chem Rev 2018; 118:7409-7531. [PMID: 30052023 PMCID: PMC6763210 DOI: 10.1021/acs.chemrev.7b00678] [Citation(s) in RCA: 399] [Impact Index Per Article: 66.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Intracellular delivery is a key step in biological research and has enabled decades of biomedical discoveries. It is also becoming increasingly important in industrial and medical applications ranging from biomanufacture to cell-based therapies. Here, we review techniques for membrane disruption-based intracellular delivery from 1911 until the present. These methods achieve rapid, direct, and universal delivery of almost any cargo molecule or material that can be dispersed in solution. We start by covering the motivations for intracellular delivery and the challenges associated with the different cargo types-small molecules, proteins/peptides, nucleic acids, synthetic nanomaterials, and large cargo. The review then presents a broad comparison of delivery strategies followed by an analysis of membrane disruption mechanisms and the biology of the cell response. We cover mechanical, electrical, thermal, optical, and chemical strategies of membrane disruption with a particular emphasis on their applications and challenges to implementation. Throughout, we highlight specific mechanisms of membrane disruption and suggest areas in need of further experimentation. We hope the concepts discussed in our review inspire scientists and engineers with further ideas to improve intracellular delivery.
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Affiliation(s)
- Martin P. Stewart
- Department of Chemical Engineering, Massachusetts Institute
of Technology, Cambridge, USA
- The Koch Institute for Integrative Cancer Research,
Massachusetts Institute of Technology, Cambridge, USA
| | - Robert Langer
- Department of Chemical Engineering, Massachusetts Institute
of Technology, Cambridge, USA
- The Koch Institute for Integrative Cancer Research,
Massachusetts Institute of Technology, Cambridge, USA
| | - Klavs F. Jensen
- Department of Chemical Engineering, Massachusetts Institute
of Technology, Cambridge, USA
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6
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Shannon EK, Stevens A, Edrington W, Zhao Y, Jayasinghe AK, Page-McCaw A, Hutson MS. Multiple Mechanisms Drive Calcium Signal Dynamics around Laser-Induced Epithelial Wounds. Biophys J 2017; 113:1623-1635. [PMID: 28978452 PMCID: PMC5627067 DOI: 10.1016/j.bpj.2017.07.022] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Revised: 07/16/2017] [Accepted: 07/31/2017] [Indexed: 12/15/2022] Open
Abstract
Epithelial wound healing is an evolutionarily conserved process that requires coordination across a field of cells. Studies in many organisms have shown that cytosolic calcium levels rise within a field of cells around the wound and spread to neighboring cells, within seconds of wounding. Although calcium is a known potent second messenger and master regulator of wound-healing programs, it is unknown what initiates the rise of cytosolic calcium across the wound field. Here we use laser ablation, a commonly used technique for the precision removal of cells or subcellular components, as a tool to investigate mechanisms of calcium entry upon wounding. Despite its precise ablation capabilities, we find that this technique damages cells outside the primary wound via a laser-induced cavitation bubble, which forms and collapses within microseconds of ablation. This cavitation bubble damages the plasma membranes of cells it contacts, tens of microns away from the wound, allowing direct calcium entry from extracellular fluid into damaged cells. Approximately 45 s after this rapid influx of calcium, we observe a second influx of calcium that spreads to neighboring cells beyond the footprint of cavitation. The occurrence of this second, delayed calcium expansion event is predicted by wound size, indicating that a separate mechanism of calcium entry exists, corresponding to cell loss at the primary wound. Our research demonstrates that the damage profile of laser ablation is more similar to a crush injury than the precision removal of individual cells. The generation of membrane microtears upon ablation is consistent with studies in the field of optoporation, which investigate ablation-induced cellular permeability. We conclude that multiple types of damage, including microtears and cell loss, result in multiple mechanisms of calcium influx around epithelial wounds.
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Affiliation(s)
- Erica K Shannon
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee; Program in Developmental Biology, Vanderbilt University, Nashville, Tennessee
| | - Aaron Stevens
- Department of Physics and Astronomy, Vanderbilt University, Nashville, Tennessee
| | - Westin Edrington
- Department of Physics and Astronomy, Vanderbilt University, Nashville, Tennessee
| | - Yunhua Zhao
- Department of Physics and Astronomy, Vanderbilt University, Nashville, Tennessee
| | - Aroshan K Jayasinghe
- Department of Physics and Astronomy, Vanderbilt University, Nashville, Tennessee
| | - Andrea Page-McCaw
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee; Program in Developmental Biology, Vanderbilt University, Nashville, Tennessee.
| | - M Shane Hutson
- Department of Physics and Astronomy, Vanderbilt University, Nashville, Tennessee; Department of Biological Sciences, Vanderbilt University, Nashville, Tennessee; Vanderbilt Institute for Integrative Biosystems Research and Education, Vanderbilt University, Nashville, Tennessee.
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7
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Greulich KO. Manipulation of cells with laser microbeam scissors and optical tweezers: a review. REPORTS ON PROGRESS IN PHYSICS. PHYSICAL SOCIETY (GREAT BRITAIN) 2017; 80:026601. [PMID: 28008877 DOI: 10.1088/1361-6633/80/2/026601] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The use of laser microbeams and optical tweezers in a wide field of biological applications from genomic to immunology is discussed. Microperforation is used to introduce a well-defined amount of molecules into cells for genetic engineering and optical imaging. The microwelding of two cells induced by a laser microbeam combines their genetic outfit. Microdissection allows specific regions of genomes to be isolated from a whole set of chromosomes. Handling the cells with optical tweezers supports investigation on the attack of immune systems against diseased or cancerous cells. With the help of laser microbeams, heart infarction can be simulated, and optical tweezers support studies on the heartbeat. Finally, laser microbeams are used to induce DNA damage in living cells for studies on cancer and ageing.
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8
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Cell viability and shock wave amplitudes in the endothelium of porcine cornea exposed to ultrashort laser pulses. Graefes Arch Clin Exp Ophthalmol 2017; 255:945-953. [PMID: 28101654 DOI: 10.1007/s00417-017-3583-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Revised: 12/19/2016] [Accepted: 01/04/2017] [Indexed: 02/07/2023] Open
Abstract
PURPOSE Some forms of keratoplasty assisted by ultrashort-pulse lasers require performing laser cuts close to the endothelium, which requires the knowledge of "safe" values concerning incision depth and pulse energy preserving endothelial cell viability. Our study aims to determine the thresholds for cell death in porcine corneas exposed to ultrashort laser pulses, in terms of laser pulse energy and nearness of the impacts to the endothelium. METHODS Using a laboratory laser set-up, lamellar cuts were induced while varying pulse energies and distances from the endothelium. A fluorescent staining protocol was used to determine the percentage of surviving endothelial cells. Numerical simulations of the Euler equations for compressible fluids provided pressure level and axial and radial pressure gradient estimates at the endothelium. RESULTS Ninety percent of the endothelial cells survived when using 16.5 μJ pulses no closer than 200 μm to the endothelium, or pulses not exceeding 2 μJ at a distance of 50 μm. The comparison of the observed percentage of surviving cells with the estimates of the shock wave amplitudes and gradients generated by the laser pulses yielded cell death thresholds at amplitudes in the megapascal range, or gradients of the order of 108 Pa/m. CONCLUSIONS Our results provide limits in terms of pulse energy and distance of the incision from the endothelium within which endothelial cell viability is preserved. Current forms of corneal laser surgery are compatible with these limits. However, these limits will need to be considered for the development of future laser routines working in close proximity to the endothelium.
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9
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Abstract
An immunologic adjuvant, which enhances the magnitude and quality of immune responses to vaccine antigens, has become an essential part of modern vaccine practice. Chemicals and biologicals have been typically used for this purpose, but there are an increasing number of studies that are being conducted on the vaccine adjuvant effect of laser light on the skin. Currently, four different types or classes of laser devices have been shown to systemically enhance immune responses to intradermal vaccination: ultra-short pulsed lasers, non-pulsed lasers, non-ablative fractional lasers and ablative fractional lasers. Aside from involving the application of laser light to the skin in a manner that minimizes discomfort and damage, each type of laser vaccine adjuvant involves emission parameters, modes of action and immunologic adjuvant effects that are quite distinct from each other. This review provides a summary of the four major classes of “laser vaccine adjuvant” and clarifies and resolves their characteristics as immunologic adjuvants. These aspects of each adjuvant’s properties will ultimately help define which laser would be most efficacious in delivering a specific clinical benefit with a specific vaccine.
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Affiliation(s)
- Satoshi Kashiwagi
- Vaccine and Immunotherapy Center, Division of Infectious Diseases, Department of Medicine, Massachusetts General Hospital, 149 13th Street, Charlestown, Massachusetts, 02129, United States of America
| | - Timothy Brauns
- Vaccine and Immunotherapy Center, Division of Infectious Diseases, Department of Medicine, Massachusetts General Hospital, 149 13th Street, Charlestown, Massachusetts, 02129, United States of America
| | - Mark C Poznansky
- Vaccine and Immunotherapy Center, Division of Infectious Diseases, Department of Medicine, Massachusetts General Hospital, 149 13th Street, Charlestown, Massachusetts, 02129, United States of America
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10
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Lajoinie G, De Cock I, Coussios CC, Lentacker I, Le Gac S, Stride E, Versluis M. In vitro methods to study bubble-cell interactions: Fundamentals and therapeutic applications. BIOMICROFLUIDICS 2016; 10:011501. [PMID: 26865903 PMCID: PMC4733084 DOI: 10.1063/1.4940429] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Accepted: 01/05/2016] [Indexed: 05/08/2023]
Abstract
Besides their use as contrast agents for ultrasound imaging, microbubbles are increasingly studied for a wide range of therapeutic applications. In particular, their ability to enhance the uptake of drugs through the permeabilization of tissues and cell membranes shows great promise. In order to fully understand the numerous paths by which bubbles can interact with cells and the even larger number of possible biological responses from the cells, thorough and extensive work is necessary. In this review, we consider the range of experimental techniques implemented in in vitro studies with the aim of elucidating these microbubble-cell interactions. First of all, the variety of cell types and cell models available are discussed, emphasizing the need for more and more complex models replicating in vivo conditions together with experimental challenges associated with this increased complexity. Second, the different types of stabilized microbubbles and more recently developed droplets and particles are presented, followed by their acoustic or optical excitation methods. Finally, the techniques exploited to study the microbubble-cell interactions are reviewed. These techniques operate over a wide range of timescales, or even off-line, revealing particular aspects or subsequent effects of these interactions. Therefore, knowledge obtained from several techniques must be combined to elucidate the underlying processes.
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Affiliation(s)
- Guillaume Lajoinie
- Physics of Fluids Group, MESA+ Institute for Nanotechnology, MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente , Enschede, The Netherlands
| | - Ine De Cock
- Laboratory of General Biochemistry and Physical Pharmacy, Ghent Research Group on Nanomedicines, Faculty of Pharmaceutical Sciences, Ghent University , Ghent, Belgium
| | | | - Ine Lentacker
- Laboratory of General Biochemistry and Physical Pharmacy, Ghent Research Group on Nanomedicines, Faculty of Pharmaceutical Sciences, Ghent University , Ghent, Belgium
| | - Séverine Le Gac
- MESA+ Institute for Nanotechnology, MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente , Enschede, The Netherlands
| | - Eleanor Stride
- Institute of Biomedical Engineering, University of Oxford , Oxford, United Kingdom
| | - Michel Versluis
- Physics of Fluids Group, MESA+ Institute for Nanotechnology, MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente , Enschede, The Netherlands
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11
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Gharatape A, Davaran S, Salehi R, Hamishehkar H. Engineered gold nanoparticles for photothermal cancer therapy and bacteria killing. RSC Adv 2016. [DOI: 10.1039/c6ra18760a] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Gold nanoparticle mediated photothermal therapy in future medicine.
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Affiliation(s)
- Alireza Gharatape
- Department of Medical Nanotechnology
- School of Advanced Medical Science
- Tabriz University of Medical Science
- Tabriz
- Iran
| | - Soodabeh Davaran
- Drug Applied Research Center and Department of Medicinal Chemistry
- Faculty of Pharmacy
- Tabriz University of Medical Science
- Tabriz
- Iran
| | - Roya Salehi
- Research Center for Pharmaceutical Nanotechnology and Department of Medical Nanotechnology
- School of Advanced Medical Science
- Tabriz University of Medical Science
- Tabriz
- Iran
| | - Hamed Hamishehkar
- Drug Applied Research Center
- Tabriz University of Medical Science
- Tabriz
- Iran
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12
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Cell membrane deformation and bioeffects produced by tandem bubble-induced jetting flow. Proc Natl Acad Sci U S A 2015; 112:E7039-47. [PMID: 26663913 DOI: 10.1073/pnas.1518679112] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Cavitation with bubble-bubble interaction is a fundamental feature in therapeutic ultrasound. However, the causal relationships between bubble dynamics, associated flow motion, cell deformation, and resultant bioeffects are not well elucidated. Here, we report an experimental system for tandem bubble (TB; maximum diameter = 50 ± 2 μm) generation, jet formation, and subsequent interaction with single HeLa cells patterned on fibronectin-coated islands (32 × 32 μm) in a microfluidic chip. We have demonstrated that pinpoint membrane poration can be produced at the leading edge of the HeLa cell in standoff distance Sd ≤ 30 μm, driven by the transient shear stress associated with TB-induced jetting flow. The cell membrane deformation associated with a maximum strain rate on the order of 10(4) s(-1) was heterogeneous. The maximum area strain ([Formula: see text]) decreased exponentially with Sd (also influenced by adhesion pattern), a feature that allows us to create distinctly different treatment outcome (i.e., necrosis, repairable poration, or nonporation) in individual cells. More importantly, our results suggest that membrane poration and cell survival are better correlated with area strain integral ([Formula: see text]) instead of [Formula: see text], which is characteristic of the response of materials under high strain-rate loadings. For 50% cell survival the corresponding area strain integral was found to vary in the range of 56 ∼ 123 μs with [Formula: see text] in the range of 57 ∼ 87%. Finally, significant variations in individual cell's response were observed at the same Sd, indicating the potential for using this method to probe mechanotransduction at the single cell level.
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13
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In Vitro Effect of Laser-Induced Hydrodynamics on Cancer Cells. Bull Exp Biol Med 2015; 160:155-9. [PMID: 26597691 DOI: 10.1007/s10517-015-3117-0] [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: 12/17/2014] [Indexed: 10/22/2022]
Abstract
We studied the effect of laser-induced hydrodynamic on viability of Colo-26 murine colon carcinoma cells in vitro. Laser-induced hydrodynamics was generated by a laser (λ=1.56 μ, power 3 W, 5 min exposure); to this end, the fiber end was submersed into a buffer above the cell monolayer. It was found that laser-induced hydrodynamics destructed the monolayer at standoff distances of between the working end of the laser fiber to cell monolayer of 1 and 5 mm and triggers apoptotic and necrotic death in remaining cells at a distance of 4 mm from the emitter.
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14
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Compton JL, Luo JC, Ma H, Botvinick E, Venugopalan V. High-throughput optical screening of cellular mechanotransduction. NATURE PHOTONICS 2014; 8:710-715. [PMID: 25309621 PMCID: PMC4189826 DOI: 10.1038/nphoton.2014.165] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2013] [Accepted: 06/23/2014] [Indexed: 05/25/2023]
Abstract
We introduce an optical platform for rapid, high-throughput screening of exogenous molecules that affect cellular mechanotransduction. Our method initiates mechanotransduction in adherent cells using single laser-microbeam generated micro-cavitation bubbles (μCBs) without requiring flow chambers or microfluidics. These μCBs expose adherent cells to a microTsunami, a transient microscale burst of hydrodynamic shear stress, which stimulates cells over areas approaching 1mm2. We demonstrate microTsunami-initiated mechanosignalling in primary human endothelial cells. This observed signalling is consistent with G-protein-coupled receptor stimulation resulting in Ca2+ release by the endoplasmic reticulum. Moreover, we demonstrate the dose-dependent modulation of microTsunami-induced Ca2+ signalling by introducing a known inhibitor to this pathway. The imaging of Ca2+ signalling, and its modulation by exogenous molecules, demonstrates the capacity to initiate and assess cellular mechanosignalling in real-time. We utilize this capability to screen the effects of a set of small molecules on cellular mechanotransduction in 96-well plates using standard imaging cytometry.
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Affiliation(s)
- Jonathan L. Compton
- Department of Chemical Engineering and Materials Science, University of California, Irvine
- Laser Microbeam and Medical Program, Beckman Laser Institute, University of California, Irvine
| | - Justin C. Luo
- Laser Microbeam and Medical Program, Beckman Laser Institute, University of California, Irvine
- Department of Biomedical Engineering, University of California, Irvine
| | - Huan Ma
- Department of Chemical Engineering and Materials Science, University of California, Irvine
- Laser Microbeam and Medical Program, Beckman Laser Institute, University of California, Irvine
| | - Elliot Botvinick
- Laser Microbeam and Medical Program, Beckman Laser Institute, University of California, Irvine
- Department of Biomedical Engineering, University of California, Irvine
- Edwards Lifesciences Center for Advanced Cardiovascular Technology, University of California, Irvine
| | - Vasan Venugopalan
- Department of Chemical Engineering and Materials Science, University of California, Irvine
- Laser Microbeam and Medical Program, Beckman Laser Institute, University of California, Irvine
- Department of Biomedical Engineering, University of California, Irvine
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