1
|
Wu J, Shindo Y, Hotta K, Vu CQ, Lu K, Wazawa T, Nagai T, Oka K. Calcium-induced upregulation of energy metabolism heats neurons during neural activity. Biochem Biophys Res Commun 2024; 708:149799. [PMID: 38522401 DOI: 10.1016/j.bbrc.2024.149799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Revised: 02/13/2024] [Accepted: 03/16/2024] [Indexed: 03/26/2024]
Abstract
Cellular temperature affects every biochemical reaction, underscoring its critical role in cellular functions. In neurons, temperature not only modulates neurotransmission but is also a key determinant of neurodegenerative diseases. Considering that the brain consumes a disproportionately high amount of energy relative to its weight, neural circuits likely generate a lot of heat, which can increase cytosolic temperature. However, the changes in temperature within neurons and the mechanisms of heat generation during neural excitation remain unclear. In this study, we achieved simultaneous imaging of Ca2+ and temperature using the genetically encoded indicators, B-GECO and B-gTEMP. We then compared the spatiotemporal distributions of Ca2+ responses and temperature. Following neural excitation induced by veratridine, an activator of the voltage-gated Na+ channel, we observed an approximately 2 °C increase in cytosolic temperature occurring 30 s after the Ca2+ response. The temperature elevation was observed in the non-nuclear region, while Ca2+ increased throughout the cell body. Moreover, this temperature increase was suppressed under Ca2+-free conditions and by inhibitors of ATP synthesis. These results indicate that Ca2+-induced upregulation of energy metabolism serves as the heat source during neural excitation.
Collapse
Affiliation(s)
- Jiayang Wu
- Department of Bioscience and Informatics, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa, 223-8522, Japan
| | - Yutaka Shindo
- Department of Bioscience and Informatics, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa, 223-8522, Japan; School of Frontier Engineering, Kitasato University, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa, 252-0373, Japan
| | - Kohji Hotta
- Department of Bioscience and Informatics, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa, 223-8522, Japan
| | - Cong Quang Vu
- SANKEN (The Institute of Scientific and Industrial Research), Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka, 567-0047, Japan
| | - Kai Lu
- SANKEN (The Institute of Scientific and Industrial Research), Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka, 567-0047, Japan
| | - Tetsuichi Wazawa
- SANKEN (The Institute of Scientific and Industrial Research), Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka, 567-0047, Japan
| | - Takeharu Nagai
- SANKEN (The Institute of Scientific and Industrial Research), Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka, 567-0047, Japan
| | - Kotaro Oka
- Department of Bioscience and Informatics, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa, 223-8522, Japan; School of Frontier Engineering, Kitasato University, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa, 252-0373, Japan; Waseda Research Institute for Science and Engineering, Waseda University, 2-2 Wakamatsucho, Shinjuku-ku, Tokyo, 162-8480, Japan.
| |
Collapse
|
2
|
Nojima Y, Takaya T, Iwata K. Energy Transfer Characteristics of Lipid Bilayer Membranes of Liposomes Examined with Picosecond Time-Resolved Raman Spectroscopy. J Phys Chem B 2023; 127:6684-6693. [PMID: 37481745 DOI: 10.1021/acs.jpcb.3c02120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/25/2023]
Abstract
A number of biochemical reactions proceed inside biomembranes. Since the rate of a chemical reaction is influenced by chemical properties of the surrounding environment, it is important to examine the chemical environment inside the biomembranes. Although the energy transfer characteristics are a basic and important property of a reaction medium, experimental investigation of the thermal conducting capabilities of the biomembranes is a challenging task. We have examined the energy transfer characteristics of lipid bilayer membranes of liposomes, a good model system for the biomembrane, with picosecond time-resolved Raman spectroscopy. The cooling kinetics of the first excited singlet (S1) state of trans-stilbene solubilized within the lipid bilayer membranes is observed as a peak shift of the 1570 cm-1 Raman band of S1 trans-stilbene. The cooling rate constant of S1 trans-stilbene is obtained in six lipid bilayer membranes formed by phospholipids with different hydrocarbon chains, DSPC, DPPC, DMPC, DLPC, DOPC, and egg-PC. We estimate the thermal diffusivity of the lipid bilayer membranes with a known correlation between the cooling rate constant and the thermal diffusivity of the solvent. The thermal diffusivity estimated for the liquid-crystal-phase lipid bilayer membranes is 8.9 × 10-8 to 9.4 × 10-8 m2 s-1, while that for the gel-phase lipid bilayer membranes is 8.4 × 10-8 to 8.5 × 10-8 m2 s-1. The difference in thermal diffusivity between the two phases is explained by a one-dimensional diffusion equation of heat.
Collapse
Affiliation(s)
- Yuki Nojima
- Department of Chemistry, Faculty of Science, Gakushuin University, Toshima-ku, Tokyo 171-8588, Japan
- Department of Chemistry, Graduate School of Science and Technology, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
| | - Tomohisa Takaya
- Department of Chemistry, Faculty of Science, Gakushuin University, Toshima-ku, Tokyo 171-8588, Japan
- Department of Electrical and Electronic Engineering, Faculty of Engineering, Toyama Prefectural University, Imizu, Toyama 939-0398, Japan
| | - Koichi Iwata
- Department of Chemistry, Faculty of Science, Gakushuin University, Toshima-ku, Tokyo 171-8588, Japan
| |
Collapse
|
3
|
Suzuki M, Liu C, Oyama K, Yamazawa T. Trans-scale thermal signaling in biological systems. J Biochem 2023; 174:217-225. [PMID: 37461189 PMCID: PMC10464929 DOI: 10.1093/jb/mvad053] [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: 04/30/2023] [Accepted: 06/21/2023] [Indexed: 08/31/2023] Open
Abstract
Biochemical reactions in cells serve as the endogenous source of heat, maintaining a constant body temperature. This process requires proper control; otherwise, serious consequences can arise due to the unwanted but unavoidable responses of biological systems to heat. This review aims to present a range of responses to heat in biological systems across various spatial scales. We begin by examining the impaired thermogenesis of malignant hyperthermia in model mice and skeletal muscle cells, demonstrating that the progression of this disease is caused by a positive feedback loop between thermally driven Ca2+ signaling and thermogenesis at the subcellular scale. After we explore thermally driven force generation in both muscle and non-muscle cells, we illustrate how in vitro assays using purified proteins can reveal the heat-responsive properties of proteins and protein assemblies. Building on these experimental findings, we propose the concept of 'trans-scale thermal signaling'.
Collapse
Key Words
- ATPase
- fluorescence microscopy
- heat-induced calcium release
- microheating
- type 1 ryanodine receptor.
Abbreviations: [Ca2+]i, intracellular Ca2+ concentration; CICR, Ca2+-induced Ca2+ release; ER, endoplasmic reticulum; FDB, flexor digitorum brevis; HEK293 cell, human embryonic kidney 293 cell; HICR, heat-induced Ca2+ release; IP3R, inositol 1,4,5-trisphosphate receptor; MH, malignant hyperthermia; RCC, rapid cooling contracture; RyR1, type 1 ryanodine receptor; SERCA, sarco/endoplasmic reticulum Ca2+-ATPase; SR, sarcoplasmic reticulum; TRP, transient receptor potential; WT, wild type
Collapse
Affiliation(s)
- Madoka Suzuki
- Institute for Protein Research, Osaka University, 3-2 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Chujie Liu
- Institute for Protein Research, Osaka University, 3-2 Yamadaoka, Suita, Osaka 565-0871, Japan
- Department of Biological Sciences, Graduate School of Science, Osaka University, 1-1, Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan
| | - Kotaro Oyama
- Foundational Quantum Technology Research Directorate, National Institutes for Quantum Science and Technology, 1233 Watanukimachi, Takasaki-shi, Gunma 370-1292, Japan
| | - Toshiko Yamazawa
- Core Research Facilities, The Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-ku, Tokyo 105-8461, Japan
| |
Collapse
|
4
|
Romshin AM, Zeeb V, Glushkov E, Radenovic A, Sinogeikin AG, Vlasov II. Nanoscale thermal control of a single living cell enabled by diamond heater-thermometer. Sci Rep 2023; 13:8546. [PMID: 37236978 DOI: 10.1038/s41598-023-35141-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2022] [Accepted: 05/13/2023] [Indexed: 05/28/2023] Open
Abstract
We report a new approach to controllable thermal stimulation of a single living cell and its compartments. The technique is based on the use of a single polycrystalline diamond particle containing silicon-vacancy (SiV) color centers. Due to the presence of amorphous carbon at its intercrystalline boundaries, such a particle is an efficient light absorber and becomes a local heat source when illuminated by a laser. Furthermore, the temperature of such a local heater is tracked by the spectral shift of the zero-phonon line of SiV centers. Thus, the diamond particle acts simultaneously as a heater and a thermometer. In the current work, we demonstrate the ability of such a Diamond Heater-Thermometer (DHT) to locally alter the temperature, one of the numerous parameters that play a decisive role for the living organisms at the nanoscale. In particular, we show that the local heating of 11-12 °C relative to the ambient temperature (22 °C) next to individual HeLa cells and neurons, isolated from the mouse hippocampus, leads to a change in the intracellular distribution of the concentration of free calcium ions. For individual HeLa cells, a long-term (about 30 s) increase in the integral intensity of Fluo-4 NW fluorescence by about three times is observed, which characterizes an increase in the [Ca2+]cyt concentration of free calcium in the cytoplasm. Heating near mouse hippocampal neurons also caused a calcium surge-an increase in the intensity of Fluo-4 NW fluorescence by 30% and a duration of ~ 0.4 ms.
Collapse
Affiliation(s)
- Alexey M Romshin
- Prokhorov General Physics Institute of the Russian Academy of Sciences, Vavilov str. 38, Moscow, 119991, Russia.
| | - Vadim Zeeb
- Institute of Theoretical and Experimental Biophysics of the Russian Academy of Sciences, Pushchino, Moscow Region, 142292, Russia.
| | - Evgenii Glushkov
- Laboratory of Nanoscale Biology, Institute of Bioengineering, Ecole Polytechnique Federale de Lausanne (EPFL), 1015, Lausanne, Switzerland
| | - Aleksandra Radenovic
- Laboratory of Nanoscale Biology, Institute of Bioengineering, Ecole Polytechnique Federale de Lausanne (EPFL), 1015, Lausanne, Switzerland
| | - Andrey G Sinogeikin
- NanThermix SA, Ecole Polytechnique Federale de Lausanne (EPFL) Innovation Park, 1015, Lausanne, Switzerland
| | - Igor I Vlasov
- Prokhorov General Physics Institute of the Russian Academy of Sciences, Vavilov str. 38, Moscow, 119991, Russia
| |
Collapse
|
5
|
Inomata N, Miyamoto T, Okabe K, Ono T. Measurement of cellular thermal properties and their temperature dependence based on frequency spectra via an on-chip-integrated microthermistor. LAB ON A CHIP 2023; 23:2411-2420. [PMID: 36880592 DOI: 10.1039/d2lc01185a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
To understand the mechanism of intracellular thermal transport, thermal properties must be elucidated, particularly thermal conductivity and specific heat capacity. However, these properties have not been extensively studied. In this study, we developed a cellular temperature measurement device with a high temperature resolution of 1.17 m °C under wet conditions and with the ability to introduce intracellular local heating using a focused infrared laser to cultured cells on the device surface. Using this device, we evaluated the thermal properties of single cells based on their temperature signals and responses. Measurements were taken using on-chip-integrated microthermistors with high temperature resolution at varying surrounding temperatures and frequencies of local infrared irradiation on cells prepared on the sensors. Frequency spectra were used to determine the intensities of the temperature signals with respect to heating times. Signal intensities at 37 °C and a frequency lower than 2 Hz were larger than those at 25 °C, which were similar to those of water. The apparent thermal conductivity and specific heat capacity, which were determined at different surrounding temperatures and local heating frequencies, were lower than and similar to those of water at 37 °C and 25 °C, respectively. Our results indicate that the thermal properties of cells depend on both temperatures and physiological activities in addition to local heating frequencies.
Collapse
Affiliation(s)
- Naoki Inomata
- Graduate School of Engineering, Tohoku University, 6-6-01 aza-Aoba Aoba, Sendai 980-8579, Japan.
| | - Takumi Miyamoto
- Graduate School of Engineering, Tohoku University, 6-6-01 aza-Aoba Aoba, Sendai 980-8579, Japan.
| | - Kohki Okabe
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo Bunkyo, Tokyo 113-0033, Japan
| | - Takahito Ono
- Graduate School of Engineering, Tohoku University, 6-6-01 aza-Aoba Aoba, Sendai 980-8579, Japan.
| |
Collapse
|
6
|
Opto-thermal technologies for microscopic analysis of cellular temperature-sensing systems. Biophys Rev 2021; 14:41-54. [PMID: 35340595 PMCID: PMC8921355 DOI: 10.1007/s12551-021-00854-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Accepted: 10/12/2021] [Indexed: 12/15/2022] Open
Abstract
AbstractCould enzymatic activities and their cooperative functions act as cellular temperature-sensing systems? This review introduces recent opto-thermal technologies for microscopic analyses of various types of cellular temperature-sensing system. Optical microheating technologies have been developed for local and rapid temperature manipulations at the cellular level. Advanced luminescent thermometers visualize the dynamics of cellular local temperature in space and time during microheating. An optical heater and thermometer can be combined into one smart nanomaterial that demonstrates hybrid function. These technologies have revealed a variety of cellular responses to spatial and temporal changes in temperature. Spatial temperature gradients cause asymmetric deformations during mitosis and neurite outgrowth. Rapid changes in temperature causes imbalance of intracellular Ca2+ homeostasis and membrane potential. Among those responses, heat-induced muscle contractions are highlighted. It is also demonstrated that the short-term heating hyperactivates molecular motors to exceed their maximal activities at optimal temperatures. We discuss future prospects for opto-thermal manipulation of cellular functions and contributions to obtain a deeper understanding of the mechanisms of cellular temperature-sensing systems.
Collapse
|
7
|
Bae J, Zheng J, Zhang H, Foster PJ, Needleman DJ, Vlassak JJ. A Micromachined Picocalorimeter Sensor for Liquid Samples with Application to Chemical Reactions and Biochemistry. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2021; 8:2003415. [PMID: 33717854 PMCID: PMC7927623 DOI: 10.1002/advs.202003415] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Revised: 11/04/2020] [Indexed: 05/28/2023]
Abstract
Calorimetry has long been used to probe the physical state of a system by measuring the heat exchanged with the environment as a result of chemical reactions or phase transitions. Application of calorimetry to microscale biological samples, however, is hampered by insufficient sensitivity and the difficulty of handling liquid samples at this scale. Here, a micromachined calorimeter sensor that is capable of resolving picowatt levels of power is described. The sensor consists of low-noise thermopiles on a thin silicon nitride membrane that allow direct differential temperature measurements between a sample and four coplanar references, which significantly reduces thermal drift. The partial pressure of water in the ambient around the sample is maintained at saturation level using a small hydrogel-lined enclosure. The materials used in the sensor and its geometry are optimized to minimize the noise equivalent power generated by the sensor in response to the temperature field that develops around a typical sample. The experimental response of the sensor is characterized as a function of thermopile dimensions and sample volume, and its capability is demonstrated by measuring the heat dissipated during an enzymatically catalyzed biochemical reaction in a microliter-sized liquid droplet. The sensor offers particular promise for quantitative measurements on biological systems.
Collapse
Affiliation(s)
- Jinhye Bae
- Department of NanoEngineeringUniversity of California San DiegoLa JollaCA92093USA
| | - Juanjuan Zheng
- John A. Paulson School of Engineering and Applied SciencesHarvard UniversityCambridgeMA02138USA
| | - Haitao Zhang
- John A. Paulson School of Engineering and Applied SciencesHarvard UniversityCambridgeMA02138USA
| | - Peter J. Foster
- Physics of Living SystemsDepartment of PhysicsMassachusetts Institute of TechnologyCambridgeMA02139USA
| | - Daniel J. Needleman
- Department of Molecular and Cellular BiologyHarvard UniversityCambridgeMA02138USA
- Center for Computational BiologyFlatiron InstituteNew YorkNY10010USA
| | - Joost J. Vlassak
- John A. Paulson School of Engineering and Applied SciencesHarvard UniversityCambridgeMA02138USA
| |
Collapse
|
8
|
Gong Z, Wu T, Chen X, Guo J, Zhang Y, Li Y. Upconversion Nanoparticle Decorated Spider Silks as Single-Cell Thermometers. NANO LETTERS 2021; 21:1469-1476. [PMID: 33476159 DOI: 10.1021/acs.nanolett.0c04644] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Noninvasive and sensitive thermometry of a single living cell is crucial to the analysis of fundamental cellular processes and applications to cancer diagnosis. Optical fibers decorated with temperature-sensitive nanomaterials have become widely used instruments for biosensing temperature. However, current silica fibers exhibit low compatibility and degradability in biosystems. In this work, we employ spider silks as natural optical fibers to construct biocompatible thermometers. The spider silks were drawn directly from Araneus ventricosus and were decorated with core-shell upconversion nanoparticles (UCNPs) via a photophoretic effect. By measuring the fluorescence spectra of the UCNPs on the spider silks, the membrane temperature of a single breast cancer cell was obtained with absolute and relative sensitivities ranging from 3.3 to 4.5 × 10-3 K-1 and 0.2 to 0.8% K-1, respectively. Additionally, the temperature variation during apoptosis was monitored by the thermometer in real time. This work provides a biocompatible tool for precise biosensing and single-cell analysis.
Collapse
Affiliation(s)
- Zhiyong Gong
- Institute of Nanophotonics, Jinan University, Guangzhou 511443, China
| | - Tianli Wu
- Institute of Nanophotonics, Jinan University, Guangzhou 511443, China
| | - Xixi Chen
- Institute of Nanophotonics, Jinan University, Guangzhou 511443, China
| | - Jinghui Guo
- Department of Physiology, School of Medicine, Jinan University, Guangzhou 510632, China
| | - Yao Zhang
- Institute of Nanophotonics, Jinan University, Guangzhou 511443, China
| | - Yuchao Li
- Institute of Nanophotonics, Jinan University, Guangzhou 511443, China
| |
Collapse
|
9
|
Affiliation(s)
- Robert S Balaban
- National Heath, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD
| |
Collapse
|
10
|
Oyama K, Gotoh M, Hosaka Y, Oyama TG, Kubonoya A, Suzuki Y, Arai T, Tsukamoto S, Kawamura Y, Itoh H, Shintani SA, Yamazawa T, Taguchi M, Ishiwata S, Fukuda N. Single-cell temperature mapping with fluorescent thermometer nanosheets. J Gen Physiol 2020; 152:151786. [PMID: 32421782 PMCID: PMC7398143 DOI: 10.1085/jgp.201912469] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Accepted: 04/17/2020] [Indexed: 01/09/2023] Open
Abstract
Recent studies using intracellular thermometers have shown that the temperature inside cultured single cells varies heterogeneously on the order of 1°C. However, the reliability of intracellular thermometry has been challenged both experimentally and theoretically because it is, in principle, exceedingly difficult to exclude the effects of nonthermal factors on the thermometers. To accurately measure cellular temperatures from outside of cells, we developed novel thermometry with fluorescent thermometer nanosheets, allowing for noninvasive global temperature mapping of cultured single cells. Various types of cells, i.e., HeLa/HEK293 cells, brown adipocytes, cardiomyocytes, and neurons, were cultured on nanosheets containing the temperature-sensitive fluorescent dye europium (III) thenoyltrifluoroacetonate trihydrate. First, we found that the difference in temperature on the nanosheet between nonexcitable HeLa/HEK293 cells and the culture medium was less than 0.2°C. The expression of mutated type 1 ryanodine receptors (R164C or Y523S) in HEK293 cells that cause Ca2+ leak from the endoplasmic reticulum did not change the cellular temperature greater than 0.1°C. Yet intracellular thermometry detected an increase in temperature of greater than ∼2°C at the endoplasmic reticulum in HeLa cells upon ionomycin-induced intracellular Ca2+ burst; global cellular temperature remained nearly constant within ±0.2°C. When rat neonatal cardiomyocytes or brown adipocytes were stimulated by a mitochondrial uncoupling reagent, the temperature was nearly unchanged within ±0.1°C. In cardiomyocytes, the temperature was stable within ±0.01°C during contractions when electrically stimulated at 2 Hz. Similarly, when rat hippocampal neurons were electrically stimulated at 0.25 Hz, the temperature was stable within ±0.03°C. The present findings with nonexcitable and excitable cells demonstrate that heat produced upon activation in single cells does not uniformly increase cellular temperature on a global basis, but merely forms a local temperature gradient on the order of ∼1°C just proximal to a heat source, such as the endoplasmic/sarcoplasmic reticulum ATPase.
Collapse
Affiliation(s)
- Kotaro Oyama
- Quantum Beam Science Research Directorate, National Institutes for Quantum and Radiological Science and Technology, Gunma, Japan.,Precursory Research for Embryonic Science and Technology, Japan Science and Technology Agency, Saitama, Japan.,Department of Cell Physiology, The Jikei University School of Medicine, Tokyo, Japan.,Department of Physics, School of Advanced Science and Engineering, Waseda University, Tokyo, Japan
| | - Mizuho Gotoh
- Department of Cell Physiology, The Jikei University School of Medicine, Tokyo, Japan.,Department of Physics, School of Advanced Science and Engineering, Waseda University, Tokyo, Japan
| | - Yuji Hosaka
- Quantum Beam Science Research Directorate, National Institutes for Quantum and Radiological Science and Technology, Gunma, Japan
| | - Tomoko G Oyama
- Quantum Beam Science Research Directorate, National Institutes for Quantum and Radiological Science and Technology, Gunma, Japan
| | - Aya Kubonoya
- Department of Cell Physiology, The Jikei University School of Medicine, Tokyo, Japan
| | - Yuma Suzuki
- Department of Cell Physiology, The Jikei University School of Medicine, Tokyo, Japan
| | - Tomomi Arai
- Department of Cell Physiology, The Jikei University School of Medicine, Tokyo, Japan.,Department of Physics, School of Advanced Science and Engineering, Waseda University, Tokyo, Japan
| | - Seiichi Tsukamoto
- Department of Cell Physiology, The Jikei University School of Medicine, Tokyo, Japan
| | - Yuki Kawamura
- Department of Pure and Applied Physics, Graduate School of Advanced Science and Engineering, Waseda University, Tokyo, Japan
| | - Hideki Itoh
- Department of Pure and Applied Physics, Graduate School of Advanced Science and Engineering, Waseda University, Tokyo, Japan.,Epithelial Biology Laboratory, Institute of Medical Biology, Agency for Science, Technology and Research, Singapore
| | - Seine A Shintani
- Department of Biomedical Sciences, College of Life and Health Sciences, Chubu University, Aichi, Japan
| | - Toshiko Yamazawa
- Department of Molecular Physiology, The Jikei University School of Medicine, Tokyo, Japan
| | - Mitsumasa Taguchi
- Quantum Beam Science Research Directorate, National Institutes for Quantum and Radiological Science and Technology, Gunma, Japan
| | - Shin'ichi Ishiwata
- Department of Physics, Faculty of Science and Engineering, Waseda University, Tokyo, Japan
| | - Norio Fukuda
- Department of Cell Physiology, The Jikei University School of Medicine, Tokyo, Japan
| |
Collapse
|
11
|
Robert HML, Savatier J, Vial S, Verghese J, Wattellier B, Rigneault H, Monneret S, Polleux J, Baffou G. Photothermal Control of Heat-Shock Protein Expression at the Single Cell Level. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:e1801910. [PMID: 29995322 DOI: 10.1002/smll.201801910] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Revised: 06/06/2018] [Indexed: 05/10/2023]
Abstract
Laser heating of individual cells in culture recently led to seminal studies in cell poration, fusion, migration, or nanosurgery, although measuring the local temperature increase in such experiments remains a challenge. Here, the laser-induced dynamical control of the heat-shock response is demonstrated at the single cell level, enabled by the use of light-absorbing gold nanoparticles as nanosources of heat and a temperature mapping technique based on quadriwave lateral shearing interferometry (QLSI) measurements. As it is label-free, this approach does not suffer from artifacts inherent to previously reported fluorescence-based temperature-mapping techniques and enables the use of any standard fluorescent labels to monitor in parallel the cell's response.
Collapse
Affiliation(s)
- Hadrien M L Robert
- Institut Fresnel, CNRS, Aix Marseille Univ, Centrale Marseille, Marseille, 13013, France
- PHASICS S.A., Parc technologique de Saint Aubin, Route de l'Orme des Merisiers, 91190, Saint Aubin, France
| | - Julien Savatier
- Institut Fresnel, CNRS, Aix Marseille Univ, Centrale Marseille, Marseille, 13013, France
| | - Stéphanie Vial
- Institut Fresnel, CNRS, Aix Marseille Univ, Centrale Marseille, Marseille, 13013, France
| | - Jacob Verghese
- Max Planck Institute of Biochemistry, Department of Cellular Biochemistry, 82152, Martinsried, Germany
| | - Benoit Wattellier
- PHASICS S.A., Parc technologique de Saint Aubin, Route de l'Orme des Merisiers, 91190, Saint Aubin, France
| | - Hervé Rigneault
- Institut Fresnel, CNRS, Aix Marseille Univ, Centrale Marseille, Marseille, 13013, France
| | - Serge Monneret
- Institut Fresnel, CNRS, Aix Marseille Univ, Centrale Marseille, Marseille, 13013, France
| | - Julien Polleux
- Max Planck Institute of Biochemistry, Department of Molecular Medicine, 82152, Martinsried, Germany
- Center for NanoScience, Ludwig Maximilian University, 80799, Munich, Germany
| | - Guillaume Baffou
- Institut Fresnel, CNRS, Aix Marseille Univ, Centrale Marseille, Marseille, 13013, France
| |
Collapse
|
12
|
Antonova OY, Kochetkova OY, Shabarchina LI, Zeeb VE. Local thermal activation of individual living cells and measurement of temperature gradients in microscopic volumes. Biophysics (Nagoya-shi) 2017. [DOI: 10.1134/s0006350917050025] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
|
13
|
Kikumoto M, Oosawa F. Thermodynamic measurements of actin polymerization with various cation species. Cytoskeleton (Hoboken) 2017; 74:465-471. [PMID: 29080281 DOI: 10.1002/cm.21416] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Revised: 09/26/2017] [Accepted: 10/13/2017] [Indexed: 12/28/2022]
Abstract
We measured the critical concentration of actin polymerized with different polymerization ions and bound divalent cations at low temperatures and estimated thermodynamic parameters. The entropy and enthalpy changes of actin polymerization were 36-55 (cal/mol K) and 2-8 (kcal/mol), respectively, with some exceptions. Both the entropy and enthalpy changes of the polymerization of Ca2+ -actin were sensitive to the polymerization ion (K+ or Na+ ): ΔS = 39 or 36 (cal/mol K), ΔΗ= 3.9 or 2.7 (kcal/mol). The entropy and enthalpy changes (cal/mol K, kcal/mol) of Mg2+ -actin were also sensitive to the polymerization ion in the following order: Mg2+ (55, 7.6) > K+ (46, 5.3) > Na+ (38, 2.4). Those values largely decreased and became even negative in the presence of a high concentration (0.1 M) of K+ , which was likely caused by the charge screening effect of that ion.
Collapse
Affiliation(s)
- Mahito Kikumoto
- Structural Biology Research Center, Graduate School of Science, Nagoya University, Nagoya, Japan
| | - Fumio Oosawa
- Graduate School of Science, Nagoya University, Professor Emeritus of Nagoya University, Nagoya/Graduate School of Engineering Science, Osaka University, Professor Emeritus of Osaka University, Suita, Japan
| |
Collapse
|
14
|
Inomata N, Toda M, Ono T. Highly sensitive thermometer using a vacuum-packed Si resonator in a microfluidic chip for the thermal measurement of single cells. LAB ON A CHIP 2016; 16:3597-603. [PMID: 27526966 DOI: 10.1039/c6lc00949b] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
A highly sensitive thermometer system for a living cell is proposed, fabricated, and evaluated. The system possesses a resonant thermal sensor surrounded by vacuum in a microfluidic chip. The measurement principle relies on resonant frequency tracking of the resonator in temperature variations due to the heat from a sample cell; the heat is conducted from the sample cell in the microfluidic channel via a heat guide connecting the resonator to a sample stage. This configuration can reduce heat loss from the resonator to the surroundings and damping in water. Two types of resonators are prepared, i.e., a cantilevered resonator and a double-supported resonator. The resonator sizes as a sensor are 30 × 50 × 1.5 μm in the cantilevered resonator, 30 × 75 × 0.40 μm in the double-supported one, respectively. The temperature and thermal resolutions of 79 μK and 1.90 nW, respectively, are achieved using the double-supported resonator. Two types of heat emissions from single brown fat cells are detected; one is continuous heat generation in the presence of chemical stimulation by a norepinephrine solution, and the other is pulsed without any stimulation.
Collapse
Affiliation(s)
- Naoki Inomata
- Department of Mechanical Systems and Design, Tohoku University, 6-6-01, aza-Aoba, Aramaki, Aoba, Sendai, Japan.
| | | | | |
Collapse
|
15
|
Oyama K, Arai T, Isaka A, Sekiguchi T, Itoh H, Seto Y, Miyazaki M, Itabashi T, Ohki T, Suzuki M, Ishiwata S. Directional bleb formation in spherical cells under temperature gradient. Biophys J 2016. [PMID: 26200871 DOI: 10.1016/j.bpj.2015.06.016] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Living cells sense absolute temperature and temporal changes in temperature using biological thermosensors such as ion channels. Here, we reveal, to our knowledge, a novel mechanism of sensing spatial temperature gradients within single cells. Spherical mitotic cells form directional membrane extensions (polar blebs) under sharp temperature gradients (≥∼0.065°C μm(-1); 1.3°C temperature difference within a cell), which are created by local heating with a focused 1455-nm laser beam under an optical microscope. On the other hand, multiple nondirectional blebs are formed under gradual temperature gradients or uniform heating. During heating, the distribution of actomyosin complexes becomes inhomogeneous due to a break in the symmetry of its contractile force, highlighting the role of the actomyosin complex as a sensor of local temperature gradients.
Collapse
Affiliation(s)
- Kotaro Oyama
- Department of Physics, School of Advanced Science and Engineering, Waseda University, Tokyo, Japan.
| | - Tomomi Arai
- Department of Physics, School of Advanced Science and Engineering, Waseda University, Tokyo, Japan
| | - Akira Isaka
- Department of Physics, School of Advanced Science and Engineering, Waseda University, Tokyo, Japan
| | - Taku Sekiguchi
- Department of Physics, School of Advanced Science and Engineering, Waseda University, Tokyo, Japan
| | - Hideki Itoh
- Department of Physics, School of Advanced Science and Engineering, Waseda University, Tokyo, Japan; Institute of Medical Biology, Agency for Science, Technology and Research (A(∗)STAR), Singapore, Singapore
| | - Yusuke Seto
- Department of Physics, School of Advanced Science and Engineering, Waseda University, Tokyo, Japan
| | - Makito Miyazaki
- Department of Physics, School of Advanced Science and Engineering, Waseda University, Tokyo, Japan
| | - Takeshi Itabashi
- Department of Physics, School of Advanced Science and Engineering, Waseda University, Tokyo, Japan
| | - Takashi Ohki
- Department of Physics, School of Advanced Science and Engineering, Waseda University, Tokyo, Japan
| | - Madoka Suzuki
- WASEDA Bioscience Research Institute in Singapore (WABIOS), Singapore, Singapore; Organization for University Research Initiatives, Waseda University, Tokyo, Japan.
| | - Shin'ichi Ishiwata
- Department of Physics, School of Advanced Science and Engineering, Waseda University, Tokyo, Japan; WASEDA Bioscience Research Institute in Singapore (WABIOS), Singapore, Singapore; Organization for University Research Initiatives, Waseda University, Tokyo, Japan.
| |
Collapse
|
16
|
Hou Y, Arai S, Kitaguchi T, Suzuki M. Intracellular bottom-up generation of targeted nanosensors for single-molecule imaging. NANOSCALE 2016; 8:3218-3225. [PMID: 26731153 DOI: 10.1039/c5nr08012f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Organic dyes are useful tools for sensing cellular activities but unfavorable in single-molecule imaging, whereas quantum dots (QDs) are widely applied in single-molecule imaging but with few sensing applications. Here, to visualize cellular activities by monitoring the response of a single probe in living cells, we propose a bottom-up approach to generate nanoprobes where four organic dyes are conjugated to tetravalent single-chain avidin (scAVD) proteins via an intracellular click reaction. We demonstrate that the nanoprobes, exhibiting increased brightness and enhanced photostability, were detectable as single dots in living cells. The ease of intracellular targeting allowed the tracking of endoplasmic reticulum (ER) remodeling with nanometer spatial resolution. Conjugating thermosensitive dyes generated temperature-sensitive nanoprobes on ER membranes that successfully monitored local temperature changes in response to external heat pulses. Our approach is potentially a suitable tool for visualizing localized cellular activities with single probe sensitivity in living cells.
Collapse
Affiliation(s)
- Yanyan Hou
- WASEDA Bioscience Research Institute in Singapore (WABIOS), 11 Biopolis Way, #05-02 Helios, Singapore 138667, Singapore.
| | | | | | | |
Collapse
|
17
|
Zhou H, Sharma M, Berezin O, Zuckerman D, Berezin MY. Nanothermometry: From Microscopy to Thermal Treatments. Chemphyschem 2016; 17:27-36. [PMID: 26443335 PMCID: PMC7396319 DOI: 10.1002/cphc.201500753] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Indexed: 01/01/2023]
Abstract
Measuring temperature in cells and tissues remotely, with sufficient sensitivity, and in real time presents a new paradigm in engineering, chemistry and biology. Traditional sensors, such as contact thermometers, thermocouples, and electrodes, are too large to measure the temperature with subcellular resolution and are too invasive to measure the temperature in deep tissue. The new challenge requires novel approaches in designing biocompatible temperature sensors-nanothermometers-and innovative techniques for their measurements. In the last two decades, a variety of nanothermometers whose response reflected the thermal environment within a physiological temperature range have been identified as potential sensors. This review covers the principles and aspects of nanothermometer design driven by two emerging areas: single-cell thermogenesis and image guided thermal treatments. The review highlights the current trends in nanothermometry illustrated with recent representative examples.
Collapse
Affiliation(s)
- Haiying Zhou
- Department of Radiology, Washington University School of Medicine, 510 S. Kingshighway, St. Louis, MO, 63110, USA
| | - Monica Sharma
- Department of Radiology, Washington University School of Medicine, 510 S. Kingshighway, St. Louis, MO, 63110, USA
| | | | - Darryl Zuckerman
- Department of Radiology, Washington University School of Medicine, 510 S. Kingshighway, St. Louis, MO, 63110, USA
| | - Mikhail Y Berezin
- Department of Radiology, Washington University School of Medicine, 510 S. Kingshighway, St. Louis, MO, 63110, USA.
- Institute for Materials Science and Engineering, Washington University, 1 Brookings Dr, St. Louis, MO, 63130, USA.
| |
Collapse
|
18
|
Sakaguchi R, Kiyonaka S, Mori Y. Fluorescent sensors reveal subcellular thermal changes. Curr Opin Biotechnol 2015; 31:57-64. [DOI: 10.1016/j.copbio.2014.07.013] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2014] [Accepted: 07/30/2014] [Indexed: 12/21/2022]
|
19
|
Itoh H, Oyama K, Suzuki M, Ishiwata S. Microscopic heat pulse-induced calcium dynamics in single WI-38 fibroblasts. Biophysics (Nagoya-shi) 2014; 10:109-19. [PMID: 27493505 PMCID: PMC4629654 DOI: 10.2142/biophysics.10.109] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Accepted: 11/16/2014] [Indexed: 12/31/2022] Open
Abstract
Temperature-sensitive Ca2+ dynamics occur primarily through transient receptor potential channels, but also by means of Ca2+ channels and pumps on the endoplasmic reticulum membrane. As such, cytoplasmic Ca2+ concentration ([Ca2+]cyt) is re-equilibrated by changes in ambient temperature. The present study investigated the effects of heat pulses (heating duration: 2 s or 150 s) on [Ca2+]cyt in single WI-38 fibroblasts, which are considered as normal cells. We found that Ca2+ burst occurred immediately after short (2 s) heat pulse, which is similar to our previous report on HeLa cells, but with less thermosensitivity. The heat pulses originated from a focused 1455-nm infrared laser light were applied in the vicinity of cells under the optical microscope. Ca2+ bursts induced by the heat pulse were suppressed by treating cells with inhibitors for sarco/endoplasmic reticulum Ca2+ ATPase (SERCA) or inositol trisphosphate receptor (IP3R). Long (150 s) heat pulses also induced Ca2+ bursts after the onset of heating and immediately after re-cooling. Cells were more thermosensitive at physiological (37°C) than at room (25°C) temperature; however, at 37°C, cells were responsive at a higher temperature (ambient temperature+heat pulse). These results strongly suggest that the heat pulse-induced Ca2+ burst is caused by a transient imbalance in Ca2+ flow between SERCA and IP3R, and offer a potential new method for thermally controlling Ca2+-regulated cellular functions.
Collapse
Affiliation(s)
- Hideki Itoh
- Department of Pure and Applied Physics, Graduate School of Advanced Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan; Institute of Medical Biology, Agency for Science Technology & Research (ASTAR), 8A Biomedical Grove, #06-06 Immunos, Singapore 138648, Singapore
| | - Kotaro Oyama
- Department of Physics, Faculty of Advanced Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan
| | - Madoka Suzuki
- Waseda Bioscience Research Institute in Singapore (WABIOS), 11 Biopolis Way, #05-02 Helios, Singapore 138667, Singapore; Organization for University Research Initiatives, Waseda University, 513 Waseda Tsurumaki-cho, Shinjuku-ku, Tokyo 162-0041, Japan
| | - Shin'ichi Ishiwata
- Department of Pure and Applied Physics, Graduate School of Advanced Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan; Department of Physics, Faculty of Advanced Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan; Waseda Bioscience Research Institute in Singapore (WABIOS), 11 Biopolis Way, #05-02 Helios, Singapore 138667, Singapore; Organization for University Research Initiatives, Waseda University, 513 Waseda Tsurumaki-cho, Shinjuku-ku, Tokyo 162-0041, Japan
| |
Collapse
|
20
|
|
21
|
Węgrzyn I, Ainla A, Jeffries GDM, Jesorka A. An optofluidic temperature probe. SENSORS (BASEL, SWITZERLAND) 2013; 13:4289-302. [PMID: 23539032 PMCID: PMC3673084 DOI: 10.3390/s130404289] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/26/2013] [Revised: 03/18/2013] [Accepted: 03/22/2013] [Indexed: 11/17/2022]
Abstract
We report the application of a microfluidic device for semi-contact temperature measurement in picoliter volumes of aqueous media. Our device, a freely positionable multifunctional pipette, operates by a hydrodynamic confinement principle, i.e., by creating a virtual flow cell of micrometer dimensions within a greater aqueous volume. We utilized two fluorescent rhodamines, which exhibit different fluorescent responses with temperature, and made ratiometric intensity measurements. The temperature dependence of the intensity ratio was calibrated and used in a model study of the thermal activation of TRPV1 ion channels expressed in Chinese hamster ovary cells. Our approach represents a practical and robust solution to the specific problem of measuring temperature in biological experiments in vitro, involving highly localized heat generation, for example with an IR-B laser.
Collapse
Affiliation(s)
- Ilona Węgrzyn
- Department of Chemical and Biological Engineering, Chalmers University of Technology, Kemivägen 10, Göteborg SE-412 96, Sweden; E-Mails: (I.W.); (A.A.); (G.D.M.J.)
| | - Alar Ainla
- Department of Chemical and Biological Engineering, Chalmers University of Technology, Kemivägen 10, Göteborg SE-412 96, Sweden; E-Mails: (I.W.); (A.A.); (G.D.M.J.)
| | - Gavin David Michael Jeffries
- Department of Chemical and Biological Engineering, Chalmers University of Technology, Kemivägen 10, Göteborg SE-412 96, Sweden; E-Mails: (I.W.); (A.A.); (G.D.M.J.)
| | - Aldo Jesorka
- Department of Chemical and Biological Engineering, Chalmers University of Technology, Kemivägen 10, Göteborg SE-412 96, Sweden; E-Mails: (I.W.); (A.A.); (G.D.M.J.)
| |
Collapse
|
22
|
Paviolo C, Clayton AHA, McArthur SL, Stoddart PR. Temperature measurement in the microscopic regime: a comparison between fluorescence lifetime- and intensity-based methods. J Microsc 2013; 250:179-88. [PMID: 23521067 DOI: 10.1111/jmi.12033] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2012] [Accepted: 02/26/2013] [Indexed: 11/26/2022]
Abstract
Thermally sensitive fluorescent indicators have been proposed to monitor temperature changes in microfluidic systems, mainly based on fluorescence intensity or lifetime. However, measuring temperature in a structured environment, such as biological tissue, presents additional challenges due to the chemical and structural complexity. Here, we investigate the potential for resolving temperature distributions within the volume of a single cell. Rhodamine B (RhB) dye was employed as a temperature indicator to compare fluorescence intensity- and lifetime-based techniques. The relationship between the fluorescence lifetime and temperature was found to be highly dependent on the biological environment. The intensity-based method allowed the temperature distribution to be mapped with partial success within the volume of a single cell. Under ideal circumstances, the temperature can be mapped pixel by pixel with a resolution better than ±0.3°C within the cell cytoplasm, but this accuracy was reduced to ±1.8°C by environmental variations. These results suggest that the fluorophore should be encapsulated and immobilized in the biological tissue in order to reduce the influence of environmental factors on temperature measurements at the cellular level.
Collapse
Affiliation(s)
- C Paviolo
- Industrial Research Institute Swinburne, Swinburne University of Technology, Hawthorn, Victoria, Australia
| | | | | | | |
Collapse
|
23
|
Bec JM, Albert ES, Marc I, Desmadryl G, Travo C, Muller A, Chabbert C, Bardin F, Dumas M. Characteristics of laser stimulation by near infrared pulses of retinal and vestibular primary neurons. Lasers Surg Med 2012; 44:736-45. [PMID: 23018648 DOI: 10.1002/lsm.22078] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/31/2012] [Indexed: 11/06/2022]
Abstract
BACKGROUND AND OBJECTIVE The optical stimulation of neurons from pulsed infrared lasers has appeared over the last years as an alternative to classical electric stimulations based on conventional electrodes. Laser stimulation could provide a better spatial selectivity allowing single-cell stimulation without prerequisite contact. In this work we present relevant physical characteristics of a non-lethal stimulation of cultured mouse vestibular and retinal ganglion neurons by single infrared laser pulses. STUDY DESIGN/MATERIALS AND METHODS Vestibular and retinal ganglion neurons were stimulated by a 100-400 mW pulsed laser diode beam (wavelengths at 1,470, 1,535, 1,875 nm) launched into a multimode optical fiber positioned at a few hundred micrometers away from the neurons. Ionic exchange measurements at the neuron membrane were achieved by whole-cell patch-clamp recordings. Stimulation and damage thresholds, duration and repetition rate of stimulation and temperature were investigated. RESULTS All three lasers induced safe and reproducible action potentials (APs) on both types of neurons. The radiant exposure thresholds required to elicit APs range from 15 ± 5 to 100 ± 5 J cm(-2) depending on the laser power and on the pulse duration. The damage thresholds, observed by a vital dye, were significantly greater than the stimulation thresholds. In the pulse duration range of our study (2-30 milliseconds), similar effects were observed for the three lasers. Measurements of the local temperature of the neuron area show that radiant exposures required for reliable stimulations at various pulse durations or laser powers correspond to a temperature increase from 22 °C (room temperature) to 55-60 °C. Stimulations by laser pulses at repetition rate of 1, 2, and 10 Hz during 10 minutes confirmed that the neurons were not damaged and were able to survive such temperatures. CONCLUSION These results show that infrared laser radiations provide a possible way to safely stimulate retinal and vestibular ganglion neurons. A similar temperature threshold is required to trigger neurons independently of variable energy thresholds, suggesting that an absolute temperature is required.
Collapse
Affiliation(s)
- Jean-Michel Bec
- Institut d'Electronique du Sud, CNRS UMR5214, Université Montpellier 2, Montpellier, France
| | | | | | | | | | | | | | | | | |
Collapse
|
24
|
Brites CDS, Lima PP, Silva NJO, Millán A, Amaral VS, Palacio F, Carlos LD. Thermometry at the nanoscale. NANOSCALE 2012; 4:4799-829. [PMID: 22763389 DOI: 10.1039/c2nr30663h] [Citation(s) in RCA: 580] [Impact Index Per Article: 48.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Non-invasive precise thermometers working at the nanoscale with high spatial resolution, where the conventional methods are ineffective, have emerged over the last couple of years as a very active field of research. This has been strongly stimulated by the numerous challenging requests arising from nanotechnology and biomedicine. This critical review offers a general overview of recent examples of luminescent and non-luminescent thermometers working at nanometric scale. Luminescent thermometers encompass organic dyes, QDs and Ln(3+)ions as thermal probes, as well as more complex thermometric systems formed by polymer and organic-inorganic hybrid matrices encapsulating these emitting centres. Non-luminescent thermometers comprise of scanning thermal microscopy, nanolithography thermometry, carbon nanotube thermometry and biomaterials thermometry. Emphasis has been put on ratiometric examples reporting spatial resolution lower than 1 micron, as, for instance, intracellular thermometers based on organic dyes, thermoresponsive polymers, mesoporous silica NPs, QDs, and Ln(3+)-based up-converting NPs and β-diketonate complexes. Finally, we discuss the challenges and opportunities in the development for highly sensitive ratiometric thermometers operating at the physiological temperature range with submicron spatial resolution.
Collapse
Affiliation(s)
- Carlos D S Brites
- Department of Physics, CICECO, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal.
| | | | | | | | | | | | | |
Collapse
|
25
|
Oyama K, Mizuno A, Shintani SA, Itoh H, Serizawa T, Fukuda N, Suzuki M, Ishiwata S. Microscopic heat pulses induce contraction of cardiomyocytes without calcium transients. Biochem Biophys Res Commun 2011; 417:607-12. [PMID: 22182408 DOI: 10.1016/j.bbrc.2011.12.015] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2011] [Accepted: 12/05/2011] [Indexed: 11/30/2022]
Abstract
It was recently demonstrated that laser irradiation can control the beating of cardiomyocytes and hearts, however, the precise mechanism remains to be clarified. Among the effects induced by laser irradiation on biological tissues, temperature change is one possible effect which can alter physiological functions. Therefore, we investigated the mechanism by which heat pulses, produced by infra-red laser light under an optical microscope, induce contractions of cardiomyocytes. Here we show that microscopic heat pulses induce contraction of rat adult cardiomyocytes. The temperature increase, ΔT, required for inducing contraction of cardiomyocytes was dependent upon the ambient temperature; that is, ΔT at physiological temperature was lower than that at room temperature. Ca(2+) transients, which are usually coupled to contraction, were not detected. We confirmed that the contractions of skinned cardiomyocytes were induced by the heat pulses even in free Ca(2+) solution. This heat pulse-induced Ca(2+)-decoupled contraction technique has the potential to stimulate heart and skeletal muscles in a manner different from the conventional electrical stimulations.
Collapse
Affiliation(s)
- Kotaro Oyama
- Department of Physics, School of Advanced Science and Engineering, Waseda University, Tokyo, Japan
| | | | | | | | | | | | | | | |
Collapse
|
26
|
Singhal R, Bhattacharyya S, Orynbayeva Z, Vitol E, Friedman G, Gogotsi Y. Small diameter carbon nanopipettes. NANOTECHNOLOGY 2010; 21:015304. [PMID: 19946151 DOI: 10.1088/0957-4484/21/1/015304] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Nanoscale multifunctional carbon probes facilitate cellular studies due to their small size, which makes it possible to interrogate organelles within living cells in a minimally invasive fashion. However, connecting nanotubes to macroscopic devices and constructing an integrated system for the purpose of fluid and electrical signal transfer is challenging, as is often the case with nanoscale components. We describe a non-catalytic chemical vapor deposition based method for batch fabrication of integrated multifunctional carbon nanopipettes (CNPs) with tip diameters much smaller (10-30 nm) than previously reported (200 nm and above) and approaching those observed for multiwalled carbon nanotubes. This eliminates the need for complicated attachment/assembly of nanotubes into nanofluidic devices. Variable tip geometries and structures were obtained by controlled deposition of carbon inside and outside quartz pipettes. We have shown that the capillary length and gas flow rate have a marked effect on the carbon deposition. This gives us a flexible protocol, useful for growing carbon layers of different thicknesses at selective locations on a glass pipette to yield a large variety of cellular probes in bulk quantities. The CNPs possess an open channel for fluid transfer with the carbon deposited inside at 875 degrees C behaving like an amorphous semiconductor. Vacuum annealing of the CNP tips at temperatures up to 2000 degrees C yields graphitic carbon structures with an increase in conductivity of two orders of magnitude. Penetration of the integrated carbon nanoprobes into cells was shown to produce minimal Ca(2+) signals, fast recovery of basal Ca(2+) levels and no adverse activation of the cellular metabolism during interrogation times as long as 0.5-1 h.
Collapse
Affiliation(s)
- Riju Singhal
- Department of Materials Science and Engineering, A J Drexel Nanotechnology Institute, Drexel University, Philadelphia, PA 19104, USA
| | | | | | | | | | | |
Collapse
|
27
|
Tseeb V, Suzuki M, Oyama K, Iwai K, Ishiwata S. Highly thermosensitive Ca dynamics in a HeLa cell through IP(3) receptors. HFSP JOURNAL 2009; 3:117-23. [PMID: 19597558 DOI: 10.2976/1.3073779] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2008] [Accepted: 01/01/2009] [Indexed: 11/19/2022]
Abstract
Intracellular Ca(2+) distribution and its dynamics are essential for various cellular functions. We show with single HeLa cells that a microscopic heat pulse induces Ca(2+) uptake into intracellular stores during heating and Ca(2+) release from them at the onset of recooling, and the overshoot of Ca(2+) release occurs above the critical value of a temperature change, which decreases from 1.5 to 0.2 degrees C on increasing the experimental temperature from 22 to 37 degrees C. This highly thermosensitive Ca(2+) dynamics is probably attributable to the altered balance between Ca(2+) uptake by endoplasmic reticulum Ca(2+)-ATPases and Ca(2+) release via inositol 1,4,5-trisphosphate receptors. These results suggest that Ca(2+) signaling is extremely sensitive to temperature changes, especially around body temperature, in cells expressing inositol 1,4,5-trisphosphate receptors.
Collapse
|
28
|
Reinhardt H, Dittrich PS, Manz A, Franzke J. micro-Hotplate enhanced optical heating by infrared light for single cell treatment. LAB ON A CHIP 2007; 7:1509-1514. [PMID: 17960279 DOI: 10.1039/b707185j] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
In this study we present a simple approach for fast and localised heating that relies on the strong absorbance of infrared light by microsized patterned surfaces ("micro-hotplates"). Two different materials, micro-arrays of carbon and gold, were tested with respect to their absorbance of the 830 nm diode laser light and their applicability. Both materials were found to be suitable for inducing controlled heating to a temperature increase of more than 10 degrees C within less than a second. The effect of optical heating on living cells (colon cancer cell line SW 480) was investigated with a modified fluorescence microscope. The temperature was controlled by varying the intensity and the exposure time of the laser light. Depending on temperature, induced death of cells in direct contact with the absorbent material was observed, or otherwise cells were kept alive. Cells survive the direct exposure of IR light without the use of the micro-hotplates. In contrast to common heating systems, the optical heating does not need direct contact to a temperature control device. Therefore, it is a very flexible method that can easily be implemented within any microchip. We believe that it will be a versatile tool for initiation and modulation of biochemical or cellular reactions, reversible cell membrane opening, and for control of cell growth.
Collapse
Affiliation(s)
- Helke Reinhardt
- ISAS-Institute for Analytical Sciences, Bunsen-Kirchhoff-Str. 11, D-44139 Dortmund, Germany
| | | | | | | |
Collapse
|
29
|
Suzuki M, Tseeb V, Oyama K, Ishiwata S. Microscopic detection of thermogenesis in a single HeLa cell. Biophys J 2007; 92:L46-8. [PMID: 17237208 PMCID: PMC1861787 DOI: 10.1529/biophysj.106.098673] [Citation(s) in RCA: 90] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
We report here the technique for detection and measurement of the temperature changes in single cells using a recently devised microthermometer (a glass micropipette filled with the thermosensitive fluorescent dye Europium (III) thenoyltrifluoroacetonate trihydrate). We found that the heat production in a single HeLa cell occurred with some time delay after the ionomycin-induced Ca(2+) influx from the extracellular space. The time delay inversely depended on extracellular [Ca(2+)], and the increase in temperature was suppressed when Ca(2+)-ATPases were blocked by thapsigargin. These observations strongly suggest that the enzymatic activity of Ca(2+)-ATPases in endoplasmic reticulum leads to the heat production. This study has therefore paved the way for studying the thermogenesis at the single-cell level.
Collapse
|
30
|
New Technologies for Imaging and Analysis of Individual Microbial Cells. IMAGING CELLULAR AND MOLECULAR BIOLOGICAL FUNCTIONS 2007. [DOI: 10.1007/978-3-540-71331-9_11] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
|