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Jin S, Ahn Y, Park J, Park M, Lee S, Lee WJ, Seo D. Temporal Patterns of Angular Displacement of Endosomes: Insights into Motor Protein Exchange Dynamics. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2306849. [PMID: 38828676 PMCID: PMC11304332 DOI: 10.1002/advs.202306849] [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: 09/21/2023] [Revised: 03/24/2024] [Indexed: 06/05/2024]
Abstract
The material transport system, facilitated by motor proteins, plays a vital role in maintaining a non-equilibrium cellular state. However, understanding the temporal coordination of motor protein activity requires an advanced imaging technique capable of measuring 3D angular displacement in real-time. In this study, a Fourier transform-based plasmonic dark-field microscope has been developed using anisotropic nanoparticles, enabling the prolonged and simultaneous observation of endosomal lateral and rotational motion. A sequence of discontinuous 3D angular displacements has been observed during the pause and run phases of transport. Notably, a serially correlated temporal pattern in the intermittent rotational events has been demonstrated during the tug-of-war mechanism, indicating Markovian switching between the exploitational and explorational modes of motor protein exchange prior to resuming movement. Alterations in transition frequency and the exploitation-to-exploration ratio upon dynein inhibitor treatment highlight the relationship between disrupted motor coordination and reduced endosomal transport efficiency. Collectively, these results suggest the importance of orchestrated temporal motor protein patterns for efficient cellular transport.
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Affiliation(s)
- Siwoo Jin
- Department of Physics and ChemistryDGISTDaegu42988Republic of Korea
| | - Yongdeok Ahn
- Department of Physics and ChemistryDGISTDaegu42988Republic of Korea
| | - Jiseong Park
- Department of Physics and ChemistryDGISTDaegu42988Republic of Korea
| | - Minsoo Park
- Department of Physics and ChemistryDGISTDaegu42988Republic of Korea
| | - Sang‐Chul Lee
- Division of Nanotechnology, and Department of DGISTDaegu42988Republic of Korea
| | - Wonhee J. Lee
- Department of Physics and ChemistryDGISTDaegu42988Republic of Korea
| | - Daeha Seo
- Department of Physics and ChemistryDGISTDaegu42988Republic of Korea
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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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Iyer RR, Liu YZ, Renteria CA, Tibble BE, Choi H, Žurauskas M, Boppart SA. Ultra-parallel label-free optophysiology of neural activity. iScience 2022; 25:104307. [PMID: 35602935 PMCID: PMC9114528 DOI: 10.1016/j.isci.2022.104307] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 02/18/2022] [Accepted: 04/22/2022] [Indexed: 01/21/2023] Open
Abstract
The electrical activity of neurons has a spatiotemporal footprint that spans three orders of magnitude. Traditional electrophysiology lacks the spatial throughput to image the activity of an entire neural network; besides, labeled optical imaging using voltage-sensitive dyes and tracking Ca2+ ion dynamics lack the versatility and speed to capture fast-spiking activity, respectively. We present a label-free optical imaging technique to image the changes to the optical path length and the local birefringence caused by neural activity, at 4,000 Hz, across a 200 × 200 μm2 region, and with micron-scale spatial resolution and 300-pm displacement sensitivity using Superfast Polarization-sensitive Off-axis Full-field Optical Coherence Microscopy (SPoOF OCM). The undulations in the optical responses from mammalian neuronal activity were matched with field-potential electrophysiology measurements and validated with channel blockers. By directly tracking the widefield neural activity at millisecond timescales and micrometer resolution, SPoOF OCM provides a framework to progress from low-throughput electrophysiology to high-throughput ultra-parallel label-free optophysiology.
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Affiliation(s)
- Rishyashring R. Iyer
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL, USA,Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Yuan-Zhi Liu
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Carlos A. Renteria
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL, USA,Department of Bioengineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Brian E. Tibble
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Honggu Choi
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Mantas Žurauskas
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Stephen A. Boppart
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL, USA,Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA,Department of Bioengineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA,Carle Illinois College of Medicine, University of Illinois at Urbana-Champaign, Urbana, IL, USA,Cancer Center at Illinois, University of Illinois at Urbana-Champaign, Urbana, IL, USA,Corresponding author
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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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