1
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Iyer RR, Applegate CC, Arogundade OH, Bangru S, Berg IC, Emon B, Porras-Gomez M, Hsieh PH, Jeong Y, Kim Y, Knox HJ, Moghaddam AO, Renteria CA, Richard C, Santaliz-Casiano A, Sengupta S, Wang J, Zambuto SG, Zeballos MA, Pool M, Bhargava R, Gaskins HR. Inspiring a convergent engineering approach to measure and model the tissue microenvironment. Heliyon 2024; 10:e32546. [PMID: 38975228 PMCID: PMC11226808 DOI: 10.1016/j.heliyon.2024.e32546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Revised: 05/22/2024] [Accepted: 06/05/2024] [Indexed: 07/09/2024] Open
Abstract
Understanding the molecular and physical complexity of the tissue microenvironment (TiME) in the context of its spatiotemporal organization has remained an enduring challenge. Recent advances in engineering and data science are now promising the ability to study the structure, functions, and dynamics of the TiME in unprecedented detail; however, many advances still occur in silos that rarely integrate information to study the TiME in its full detail. This review provides an integrative overview of the engineering principles underlying chemical, optical, electrical, mechanical, and computational science to probe, sense, model, and fabricate the TiME. In individual sections, we first summarize the underlying principles, capabilities, and scope of emerging technologies, the breakthrough discoveries enabled by each technology and recent, promising innovations. We provide perspectives on the potential of these advances in answering critical questions about the TiME and its role in various disease and developmental processes. Finally, we present an integrative view that appreciates the major scientific and educational aspects in the study of the TiME.
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Affiliation(s)
- Rishyashring R. Iyer
- Department of Electrical and Computer Engineering, University of Illinois Urbana-Champaign, Urbana, IL, 61801, USA
| | - Catherine C. Applegate
- Division of Nutritional Sciences, University of Illinois Urbana-Champaign, Urbana, IL, 61801, USA
| | - Opeyemi H. Arogundade
- Department of Bioengineering, University of Illinois Urbana-Champaign, Urbana, IL, 61801, USA
| | - Sushant Bangru
- Department of Biochemistry, University of Illinois Urbana-Champaign, Urbana, IL, 61801, USA
| | - Ian C. Berg
- Department of Bioengineering, University of Illinois Urbana-Champaign, Urbana, IL, 61801, USA
| | - Bashar Emon
- Department of Mechanical Science and Engineering, University of Illinois Urbana-Champaign, Urbana, IL, 61801, USA
| | - Marilyn Porras-Gomez
- Department of Materials Science and Engineering, University of Illinois Urbana-Champaign, Urbana, IL, 61801, USA
| | - Pei-Hsuan Hsieh
- Department of Bioengineering, University of Illinois Urbana-Champaign, Urbana, IL, 61801, USA
| | - Yoon Jeong
- Department of Bioengineering, University of Illinois Urbana-Champaign, Urbana, IL, 61801, USA
| | - Yongdeok Kim
- Department of Materials Science and Engineering, University of Illinois Urbana-Champaign, Urbana, IL, 61801, USA
| | - Hailey J. Knox
- Department of Chemistry, University of Illinois Urbana-Champaign, Urbana, IL, 61801, USA
| | - Amir Ostadi Moghaddam
- Department of Mechanical Science and Engineering, University of Illinois Urbana-Champaign, Urbana, IL, 61801, USA
| | - Carlos A. Renteria
- Department of Bioengineering, University of Illinois Urbana-Champaign, Urbana, IL, 61801, USA
| | - Craig Richard
- Department of Bioengineering, University of Illinois Urbana-Champaign, Urbana, IL, 61801, USA
| | - Ashlie Santaliz-Casiano
- Division of Nutritional Sciences, University of Illinois Urbana-Champaign, Urbana, IL, 61801, USA
| | - Sourya Sengupta
- Department of Electrical and Computer Engineering, University of Illinois Urbana-Champaign, Urbana, IL, 61801, USA
| | - Jason Wang
- Department of Bioengineering, University of Illinois Urbana-Champaign, Urbana, IL, 61801, USA
| | - Samantha G. Zambuto
- Department of Bioengineering, University of Illinois Urbana-Champaign, Urbana, IL, 61801, USA
| | - Maria A. Zeballos
- Department of Bioengineering, University of Illinois Urbana-Champaign, Urbana, IL, 61801, USA
| | - Marcia Pool
- Department of Bioengineering, University of Illinois Urbana-Champaign, Urbana, IL, 61801, USA
- Cancer Center at Illinois, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Rohit Bhargava
- Department of Electrical and Computer Engineering, University of Illinois Urbana-Champaign, Urbana, IL, 61801, USA
- Department of Bioengineering, University of Illinois Urbana-Champaign, Urbana, IL, 61801, USA
- Department of Mechanical Science and Engineering, University of Illinois Urbana-Champaign, Urbana, IL, 61801, USA
- Department of Chemistry, University of Illinois Urbana-Champaign, Urbana, IL, 61801, USA
- Department of Chemical and Biochemical Engineering, University of Illinois Urbana-Champaign, Urbana, IL, 61801, USA
- Cancer Center at Illinois, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
- NIH/NIBIB P41 Center for Label-free Imaging and Multiscale Biophotonics (CLIMB), University of Illinois Urbana-Champaign, Urbana, IL, 61801, USA
| | - H. Rex Gaskins
- Division of Nutritional Sciences, University of Illinois Urbana-Champaign, Urbana, IL, 61801, USA
- Cancer Center at Illinois, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
- Department of Animal Sciences, University of Illinois Urbana-Champaign, Urbana, IL, 61801, USA
- Department of Biomedical and Translational Sciences, University of Illinois Urbana-Champaign, Urbana, IL, 61801, USA
- Department of Pathobiology, University of Illinois Urbana-Champaign, Urbana, IL, 61801, USA
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2
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Perrett S, Chatrchyan V, Buckup T, van Thor JJ. Application of density matrix Wigner transforms for ultrafast macromolecular and chemical x-ray crystallography. J Chem Phys 2024; 160:100901. [PMID: 38456527 DOI: 10.1063/5.0188888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Accepted: 02/12/2024] [Indexed: 03/09/2024] Open
Abstract
Time-Resolved Serial Femtosecond Crystallography (TR-SFX) conducted at X-ray Free Electron Lasers (XFELs) has become a powerful tool for capturing macromolecular structural movies of light-initiated processes. As the capabilities of XFELs advance, we anticipate that a new range of coherent control and structural Raman measurements will become achievable. Shorter optical and x-ray pulse durations and increasingly more exotic pulse regimes are becoming available at free electron lasers. Moreover, with high repetition enabled by the superconducting technology of European XFEL (EuXFEL) and Linac Coherent Light Source (LCLS-II) , it will be possible to improve the signal-to-noise ratio of the light-induced differences, allowing for the observation of vibronic motion on the sub-Angstrom level. To predict and assign this coherent motion, which is measurable with a structural technique, new theoretical approaches must be developed. In this paper, we present a theoretical density matrix approach to model the various population and coherent dynamics of a system, which considers molecular system parameters and excitation conditions. We emphasize the use of the Wigner transform of the time-dependent density matrix, which provides a phase space representation that can be directly compared to the experimental positional displacements measured in a TR-SFX experiment. Here, we extend the results from simple models to include more realistic schemes that include large relaxation terms. We explore a variety of pulse schemes using multiple model systems using realistic parameters. An open-source software package is provided to perform the density matrix simulation and Wigner transformations. The open-source software allows us to define any arbitrary level schemes as well as any arbitrary electric field in the interaction Hamiltonian.
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Affiliation(s)
- Samuel Perrett
- Department of Life Sciences, Faculty of Natural Sciences, Imperial College London, London, United Kingdom
| | - Viktoria Chatrchyan
- Physikalisch Chemisches Institut, Ruprecht-Karls Universität, D-69120 Heidelberg, Germany
| | - Tiago Buckup
- Physikalisch Chemisches Institut, Ruprecht-Karls Universität, D-69120 Heidelberg, Germany
| | - Jasper J van Thor
- Department of Life Sciences, Faculty of Natural Sciences, Imperial College London, London, United Kingdom
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3
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Wang G, Li L, Liao X, Wang S, Mitchell J, Rabel C, Luo S, Shi J, Sorrells JE, Iyer RR, Aksamitiene E, Renteria CA, Chaney EJ, Milner DJ, Wheeler MB, Gillette MU, Schwing A, Chen J, Tu H. Supercontinuum intrinsic fluorescence imaging heralds free view of living systems. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.01.26.577383. [PMID: 38328159 PMCID: PMC10849662 DOI: 10.1101/2024.01.26.577383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/09/2024]
Abstract
Optimal imaging strategies remain underdeveloped to maximize information for fluorescence microscopy while minimizing the harm to fragile living systems. Taking hint from the supercontinuum generation in ultrafast laser physics, we generated supercontinuum fluorescence from untreated unlabeled live samples before nonlinear photodamage onset. Our imaging achieved high-content cell phenotyping and tissue histology, identified bovine embryo polarization, quantified aging-related stress across cell types and species, demystified embryogenesis before and after implantation, sensed drug cytotoxicity in real-time, scanned brain area for targeted patching, optimized machine learning to track small moving organisms, induced two-photon phototropism of leaf chloroplasts under two-photon photosynthesis, unraveled microscopic origin of autumn colors, and interrogated intestinal microbiome. The results enable a facility-type microscope to freely explore vital molecular biology across life sciences.
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4
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Choi H, Iyer RR, Renteria CA, Boppart SA. Phase-sensitive detection of anomalous diffusion dynamics in the neuronal membrane induced by ion channel gating. Phys Med Biol 2023; 68:065005. [PMID: 36848681 PMCID: PMC10010434 DOI: 10.1088/1361-6560/acbf9c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 02/14/2023] [Accepted: 02/27/2023] [Indexed: 03/01/2023]
Abstract
Non-ergodicity of neuronal dynamics from rapid ion channel gating through the membrane induces membrane displacement statistics that deviate from Brownian motion. The membrane dynamics from ion channel gating were imaged by phase-sensitive optical coherence microscopy. The distribution of optical displacements of the neuronal membrane showed a Lévy-like distribution and the memory effect of the membrane dynamics by the ionic gating was estimated. The alternation of the correlation time was observed when neurons were exposed to channel-blocking molecules. Non-invasive optophysiology by detecting the anomalous diffusion characteristics of dynamic images is demonstrated.
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Affiliation(s)
- Honggu Choi
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, United States of America
| | - Rishyashring R Iyer
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, United States of America
- Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, United States of America
| | - Carlos A Renteria
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, United States of America
- Department of Bioengineering, University of Illinois at Urbana-Champaign, Urbana, United States of America
| | - Stephen A Boppart
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, United States of America
- Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, United States of America
- Department of Bioengineering, University of Illinois at Urbana-Champaign, Urbana, United States of America
- Carle Illinois College of Medicine, University of Illinois at Urbana-Champaign, Urbana, United States of America
- Cancer Center at Illinois, University of Illinois at Urbana-Champaign, Urbana, United States of America
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5
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Chen B, Cui M, Wang Y, Shi P, Wang H, Wang F. Recent advances in cellular optogenetics for photomedicine. Adv Drug Deliv Rev 2022; 188:114457. [PMID: 35843507 DOI: 10.1016/j.addr.2022.114457] [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: 02/09/2022] [Revised: 06/13/2022] [Accepted: 07/11/2022] [Indexed: 11/26/2022]
Abstract
Since the successful introduction of exogenous photosensitive proteins, channelrhodopsin, to neurons, optogenetics has enabled substantial understanding of profound brain function by selectively manipulating neural circuits. In an optogenetic system, optical stimulation can be precisely delivered to brain tissue to achieve regulation of cellular electrical activity with unprecedented spatio-temporal resolution in living organisms. In recent years, the development of various optical actuators and novel light-delivery techniques has greatly expanded the scope of optogenetics, enabling the control of other signal pathways in non-neuronal cells for different biomedical applications, such as phototherapy and immunotherapy. This review focuses on the recent advances in optogenetic regulation of cellular activities for photomedicine. We discuss emerging optogenetic tools and light-delivery platforms, along with a survey of optogenetic execution in mammalian and microbial cells.
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Affiliation(s)
- Bing Chen
- Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, China; City University of Hong Kong Shenzhen Research Institute, Shenzhen 518057, China
| | - Meihui Cui
- School of Life Sciences, Tianjin University, Tianjin 300072, China
| | - Yuan Wang
- Department of Biomedical Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, China
| | - Peng Shi
- Department of Biomedical Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, China.
| | - Hanjie Wang
- School of Life Sciences, Tianjin University, Tianjin 300072, China.
| | - Feng Wang
- Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, China; City University of Hong Kong Shenzhen Research Institute, Shenzhen 518057, China.
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6
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Zhu X, Engelberg J, Remennik S, Zhou B, Pedersen JN, Uhd Jepsen P, Levy U, Kristensen A. Resonant Laser Printing of Optical Metasurfaces. NANO LETTERS 2022; 22:2786-2792. [PMID: 35311279 DOI: 10.1021/acs.nanolett.1c04874] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
One of the challenges for metasurface research is upscaling. The conventional methods for fabrication of metasurfaces, such as electron-beam or focused ion beam lithography, are not scalable. The use of ultraviolet steppers or nanoimprinting still requires large-size masks or stamps, which are costly and challenging in further handling. This work demonstrates a cost-effective and lithography-free method for printing optical metasurfaces. It is based on resonant absorption of laser light in an optical cavity formed by a multilayer structure of ultrathin metal and dielectric coatings. A nearly perfect light absorption is obtained via interferometric control of absorption and operating around a critical coupling condition. Controlled by the laser power, the surface undergoes a structural transition from random, semiperiodic, and periodic to amorphous patterns with nanoscale precision. The reliability, upscaling, and subwavelength resolution of this approach are demonstrated by realizing metasurfaces for structural colors, optical holograms, and diffractive optical elements.
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Affiliation(s)
- Xiaolong Zhu
- State Key Laboratory of Precision Spectroscopy, School of Physics and Electronic Science, East China Normal University, Shanghai 200241, China
- Department of Health Technology, Technical University of Denmark, Kongens Lyngby 2800, Denmark
| | - Jacob Engelberg
- Department of Applied Physics, The Faculty of Science, The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Sergei Remennik
- Department of Applied Physics, The Faculty of Science, The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Binbin Zhou
- Department of Photonics Engineering, Technical University of Denmark, Kongens Lyngby 2800, Denmark
| | - Jonas Nyvold Pedersen
- Department of Health Technology, Technical University of Denmark, Kongens Lyngby 2800, Denmark
| | - Peter Uhd Jepsen
- Department of Photonics Engineering, Technical University of Denmark, Kongens Lyngby 2800, Denmark
| | - Uriel Levy
- Department of Applied Physics, The Faculty of Science, The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Anders Kristensen
- Department of Health Technology, Technical University of Denmark, Kongens Lyngby 2800, Denmark
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7
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Gaulier G, Dietschi Q, Bhattacharyya S, Schmidt C, Montagnese M, Chauvet A, Hermelin S, Chiodini F, Bonacina L, Herrera PL, Rothlisberger U, Rodriguez I, Wolf JP. Ultrafast pulse shaping modulates perceived visual brightness in living animals. SCIENCE ADVANCES 2021; 7:7/18/eabe1911. [PMID: 33910906 PMCID: PMC8081367 DOI: 10.1126/sciadv.abe1911] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Accepted: 03/09/2021] [Indexed: 06/12/2023]
Abstract
Vision is usually assumed to be sensitive to the light intensity and spectrum but not to its spectral phase. However, experiments performed on retinal proteins in solution showed that the first step of vision consists in an ultrafast photoisomerization that can be coherently controlled by shaping the phase of femtosecond laser pulses, especially in the multiphoton interaction regime. The link between these experiments in solution and the biological process allowing vision was not demonstrated. Here, we measure the electric signals fired from the retina of living mice upon femtosecond multipulse and single-pulse light stimulation. Our results show that the electrophysiological signaling is sensitive to the manipulation of the light excitation on a femtosecond time scale. The mechanism relies on multiple interactions with the light pulses close to the conical intersection, like pump-dump (photoisomerization interruption) and pump-repump (reverse isomerization) processes. This interpretation is supported both experimentally and by dynamics simulations.
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Affiliation(s)
- Geoffrey Gaulier
- Group of Applied Physics, University of Geneva, 22 Ch. de Pinchat, 1211 Geneva, Switzerland
| | - Quentin Dietschi
- Department of Genetics and Evolution, University of Geneva, 30 Quai Ansermet, 1211 Geneva, Switzerland
| | - Swarnendu Bhattacharyya
- Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Cédric Schmidt
- Group of Applied Physics, University of Geneva, 22 Ch. de Pinchat, 1211 Geneva, Switzerland
| | - Matteo Montagnese
- Group of Applied Physics, University of Geneva, 22 Ch. de Pinchat, 1211 Geneva, Switzerland
| | - Adrien Chauvet
- Group of Applied Physics, University of Geneva, 22 Ch. de Pinchat, 1211 Geneva, Switzerland
| | - Sylvain Hermelin
- Group of Applied Physics, University of Geneva, 22 Ch. de Pinchat, 1211 Geneva, Switzerland
| | - Florence Chiodini
- Biobanque de tissus thérapeutiques, Department of Diagnostic, University Hospitals of Geneva, Rue Gabrielle-Perret-Gentil 4, 1205 Geneva, Switzerland
| | - Luigi Bonacina
- Group of Applied Physics, University of Geneva, 22 Ch. de Pinchat, 1211 Geneva, Switzerland
| | - Pedro L Herrera
- Department of Genetic Medicine and Development, University of Geneva, 1 Rue Michel-Servet, 1211 Geneva, Switzerland
| | - Ursula Rothlisberger
- Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Ivan Rodriguez
- Department of Genetics and Evolution, University of Geneva, 30 Quai Ansermet, 1211 Geneva, Switzerland
| | - Jean-Pierre Wolf
- Group of Applied Physics, University of Geneva, 22 Ch. de Pinchat, 1211 Geneva, Switzerland.
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8
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Liu YZ, Renteria C, Courtney CD, Ibrahim B, You S, Chaney EJ, Barkalifa R, Iyer RR, Zurauskas M, Tu H, Llano DA, Christian-Hinman CA, Boppart SA. Simultaneous two-photon activation and imaging of neural activity based on spectral-temporal modulation of supercontinuum light. NEUROPHOTONICS 2020; 7:045007. [PMID: 33163545 PMCID: PMC7607614 DOI: 10.1117/1.nph.7.4.045007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Accepted: 10/14/2020] [Indexed: 05/03/2023]
Abstract
SIGNIFICANCE Recent advances in nonlinear optics in neuroscience have focused on using two ultrafast lasers for activity imaging and optogenetic stimulation. Broadband femtosecond light sources can obviate the need for multiple lasers by spectral separation for chromatically targeted excitation. AIM We present a photonic crystal fiber (PCF)-based supercontinuum source for spectrally resolved two-photon (2P) imaging and excitation of GCaMP6s and C1V1-mCherry, respectively. APPROACH A PCF is pumped using a 20-MHz repetition rate femtosecond laser to generate a supercontinuum of light, which is spectrally separated, compressed, and recombined to image GCaMP6s (930 nm excitation) and stimulate the optogenetic protein, C1V1-mCherry (1060 nm excitation). Galvanometric spiral scanning is employed on a single-cell level for multiphoton excitation and high-speed resonant scanning is employed for imaging of calcium activity. RESULTS Continuous wave lasers were used to verify functionality of optogenetic activation followed by directed 2P excitation. Results from these experiments demonstrate the utility of a supercontinuum light source for simultaneous, single-cell excitation and calcium imaging. CONCLUSIONS A PCF-based supercontinuum light source was employed for simultaneous imaging and excitation of calcium dynamics in brain tissue. Pumped PCFs can serve as powerful light sources for imaging and activation of neural activity, and overcome the limited spectra and space associated with multilaser approaches.
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Affiliation(s)
- Yuan-Zhi Liu
- University of Illinois at Urbana–Champaign, Beckman Institute for Advanced Science and Technology, Urbana, Illinois, United States
- University of Illinois at Urbana–Champaign, Department of Electrical and Computer Engineering, Urbana, Illinois, United States
| | - Carlos Renteria
- University of Illinois at Urbana–Champaign, Beckman Institute for Advanced Science and Technology, Urbana, Illinois, United States
- University of Illinois at Urbana–Champaign, Department of Bioengineering, Urbana, Illinois, United States
| | - Connor D. Courtney
- University of Illinois at Urbana–Champaign, Beckman Institute for Advanced Science and Technology, Urbana, Illinois, United States
- University of Illinois at Urbana–Champaign, Neuroscience Program, Urbana, Illinois, United States
| | - Baher Ibrahim
- University of Illinois at Urbana–Champaign, Beckman Institute for Advanced Science and Technology, Urbana, Illinois, United States
| | - Sixian You
- University of Illinois at Urbana–Champaign, Beckman Institute for Advanced Science and Technology, Urbana, Illinois, United States
- University of Illinois at Urbana–Champaign, Department of Electrical and Computer Engineering, Urbana, Illinois, United States
- University of Illinois at Urbana–Champaign, Computational Science and Engineering, Urbana, Illinois, United States
| | - Eric J. Chaney
- University of Illinois at Urbana–Champaign, Beckman Institute for Advanced Science and Technology, Urbana, Illinois, United States
| | - Ronit Barkalifa
- University of Illinois at Urbana–Champaign, Beckman Institute for Advanced Science and Technology, Urbana, Illinois, United States
| | - Rishyashring R. Iyer
- University of Illinois at Urbana–Champaign, Beckman Institute for Advanced Science and Technology, Urbana, Illinois, United States
- University of Illinois at Urbana–Champaign, Department of Electrical and Computer Engineering, Urbana, Illinois, United States
| | - Mantas Zurauskas
- University of Illinois at Urbana–Champaign, Beckman Institute for Advanced Science and Technology, Urbana, Illinois, United States
| | - Haohua Tu
- University of Illinois at Urbana–Champaign, Beckman Institute for Advanced Science and Technology, Urbana, Illinois, United States
| | - Daniel A. Llano
- University of Illinois at Urbana–Champaign, Beckman Institute for Advanced Science and Technology, Urbana, Illinois, United States
- University of Illinois at Urbana–Champaign, Neuroscience Program, Urbana, Illinois, United States
- University of Illinois at Urbana–Champaign, Department of Molecular and Integrative Physiology, Urbana, Illinois, United States
| | - Catherine A. Christian-Hinman
- University of Illinois at Urbana–Champaign, Beckman Institute for Advanced Science and Technology, Urbana, Illinois, United States
- University of Illinois at Urbana–Champaign, Neuroscience Program, Urbana, Illinois, United States
- University of Illinois at Urbana–Champaign, Department of Molecular and Integrative Physiology, Urbana, Illinois, United States
| | - Stephen A. Boppart
- University of Illinois at Urbana–Champaign, Beckman Institute for Advanced Science and Technology, Urbana, Illinois, United States
- University of Illinois at Urbana–Champaign, Department of Electrical and Computer Engineering, Urbana, Illinois, United States
- University of Illinois at Urbana–Champaign, Department of Bioengineering, Urbana, Illinois, United States
- University of Illinois at Urbana–Champaign, Neuroscience Program, Urbana, Illinois, United States
- University of Illinois at Urbana–Champaign, Computational Science and Engineering, Urbana, Illinois, United States
- University of Illinois at Urbana–Champaign, Carle Illinois College of Medicine, Urbana, Illinois, United States
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9
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Lavigne C, Brumer P. Pulsed two-photon coherent control of channelrhodopsin-2 photocurrent in live brain cells. J Chem Phys 2020; 153:034303. [PMID: 32716190 DOI: 10.1063/5.0012642] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Channelrhodopsin-2 (ChR2) is an ion channel activated by the absorption of light. A recent experiment demonstrated that the current emanating from neurons in live brain cells expressing ChR2 can be controlled using two-photon phase control. Here, we propose an experimentally testable coherent control mechanism for this phenomenon. Significantly, we describe how femtosecond, quantum coherent processes arising from weak-field ultrafast excitation are responsible for the reported control of the millisecond classical dynamics of the neuronal current.
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Affiliation(s)
- Cyrille Lavigne
- Chemical Physics Theory Group, Department of Chemistry, and Center for Quantum Information and Quantum Control, University of Toronto, Toronto, Ontario M5S 3H6, Canada
| | - Paul Brumer
- Chemical Physics Theory Group, Department of Chemistry, and Center for Quantum Information and Quantum Control, University of Toronto, Toronto, Ontario M5S 3H6, Canada
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10
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Time-resolved serial femtosecond crystallography at the European XFEL. Nat Methods 2019; 17:73-78. [PMID: 31740816 PMCID: PMC9113060 DOI: 10.1038/s41592-019-0628-z] [Citation(s) in RCA: 86] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Accepted: 10/03/2019] [Indexed: 11/08/2022]
Abstract
The European XFEL (EuXFEL) is a 3.4 km long X-ray source, which produces femtosecond, ultra-brilliant and spatially coherent X-ray pulses at megahertz repetition rates. This X-ray source has been designed to enable the observation of ultrafast processes with near-atomic spatial resolution. Time-resolved crystallographic investigations on biological reactions constitute a particularly important class of experiments with biomedical and health related implications. Due to the unusual X-ray pulse structure, such an experiment is challenging. Here we demonstrate how a biological reaction can be followed on ultrafast time scales at the EuXFEL. We investigate the picosecond time range in the photocycle of photoactive yellow protein (PYP) with MHz X-ray pulse rates. We show that difference electron density maps of excellent quality can be obtained. Results connect the previously explored femtosecond PYP dynamics to time scales accessible at synchrotrons. This opens the door to a wide range of time resolved studies at the EuXFEL.
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11
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Lavigne C, Brumer P. An efficient spectral method for numerical time-dependent perturbation theory. J Chem Phys 2019; 151:144106. [PMID: 31615231 DOI: 10.1063/1.5121722] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We develop the Fourier-Laplace Inversion of the Perturbation Theory (FLIPT), a novel numerically exact "black box" method to compute perturbative expansions of the density matrix with rigorous convergence conditions. Specifically, the FLIPT method is extremely well-suited to simulate multiphoton pulsed laser experiments with complex pulse shapes. The n-dimensional frequency integrals of the nth order perturbative expansion are evaluated numerically using tensor products. The N-point discretized integrals are computed in O(N2) operations, a significant improvement over the O(Nn) scaling of standard quadrature methods.
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Affiliation(s)
- Cyrille Lavigne
- Chemical Physics Theory Group, Department of Chemistry, and Center for Quantum Information and Quantum Control, University of Toronto, Toronto, Ontario M5S 3H6, Canada
| | - Paul Brumer
- Chemical Physics Theory Group, Department of Chemistry, and Center for Quantum Information and Quantum Control, University of Toronto, Toronto, Ontario M5S 3H6, Canada
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Wilma K, Shu CC, Scherf U, Hildner R. Visualizing Hidden Ultrafast Processes in Individual Molecules by Single-Pulse Coherent Control. J Am Chem Soc 2018; 140:15329-15335. [DOI: 10.1021/jacs.8b08674] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kevin Wilma
- Soft Matter Spectroscopy, University of Bayreuth, 95440 Bayreuth, Germany
| | - Chuan-Cun Shu
- Institute of Super-Microstructure and Ultrafast Process in Advanced Materials, School of Physics and Electronics, Central South University, Changsha 410083, China
- School of Engineering and Information Technology, University of New South Wales, Canberra, Australian Capital Territory 2600, Australia
| | - Ullrich Scherf
- Fachbereich C − Mathematik und Naturwissenschaften and Institut für Polymertechnologie, Universität Wuppertal, 42097 Wuppertal, Germany
| | - Richard Hildner
- Soft Matter Spectroscopy, University of Bayreuth, 95440 Bayreuth, Germany
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Blasing DB, Pérez-Ríos J, Yan Y, Dutta S, Li CH, Zhou Q, Chen YP. Observation of Quantum Interference and Coherent Control in a Photochemical Reaction. PHYSICAL REVIEW LETTERS 2018; 121:073202. [PMID: 30169056 DOI: 10.1103/physrevlett.121.073202] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Indexed: 06/08/2023]
Abstract
Coherent control of reactants remains a long-standing challenge in quantum chemistry. In particular, we have studied laser-induced molecular formation (photoassociation) in a Raman-dressed spin-orbit-coupled ^{87}Rb Bose-Einstein condensate, whose spin quantum state is a superposition of multiple bare spin components. In contrast to the notably different photoassociation-induced fractional atom losses observed for the bare spin components of a statistical mixture, a superposition state with a comparable spin composition displays the same fractional loss on every spin component. We interpret this as the superposition state itself undergoing photoassociation. For superposition states induced by a large Raman coupling and zero Raman detuning, we observe a nearly complete suppression of the photoassociation rate. This suppression is consistent with a model based upon quantum destructive interference between two photoassociation pathways for colliding atoms with different spin combinations. This model also explains the measured dependence of the photoassociation rate on the Raman detuning at a moderate Raman coupling. Our work thus suggests that preparing atoms in quantum superpositions may represent a powerful new technique to coherently control photochemical reactions.
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Affiliation(s)
- David B Blasing
- Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA
| | - Jesús Pérez-Ríos
- School of Materials Sciences and Technology, Universidad del Turabo, Gurabo, Puerto Rico 00778, USA
| | - Yangqian Yan
- Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA
| | - Sourav Dutta
- Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA
- Department of Physics, Indian Institute of Science Education and Research, Bhopal 462066, India
| | - Chuan-Hsun Li
- School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907, USA
| | - Qi Zhou
- Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA
- Purdue Quantum Center, Purdue University, West Lafayette, Indiana 47907, USA
| | - Yong P Chen
- Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA
- School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907, USA
- Purdue Quantum Center, Purdue University, West Lafayette, Indiana 47907, USA
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