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Chen Z, Cao X, Li X, Pan B, Wang P, Li T. A Novel Approach to Evaluating Crosstalk for Near-Infrared Spectrometers. SENSORS (BASEL, SWITZERLAND) 2024; 24:990. [PMID: 38339709 PMCID: PMC10857642 DOI: 10.3390/s24030990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 01/18/2024] [Accepted: 01/31/2024] [Indexed: 02/12/2024]
Abstract
Multi-channel and multi-parameter near-infrared spectroscopy (NIRS) has gradually become a new research direction and hot spot due to its ability to provide real-time, continuous, comprehensive indicators of multiple parameters. However, multi-channel and multi-parameter detection may lead to crosstalk between signals. There is still a lack of benchmarks for the evaluation of the reliability, sensitivity, stability and response consistency of the NIRS instruments. In this study, a set of test methods (a human blood model test, ink drop test, multi-channel crosstalk test and multi-parameter crosstalk test) for analyzing crosstalk and verifying the reliability of NIRS was conducted to test experimental verification on a multi-channel (8-channel), multi-parameter (4-parameter) NIRS instrument independently developed by our team. Results show that these tests can be used to analyze the signal crosstalk and verify the reliability, sensitivity, stability and response consistency of the NIRS instrument. This study contributes to the establishment of benchmarks for the NIRS instrument crosstalk and reliability testing. These novel tests have the potential to become the benchmark for NIRS instrument reliability testing.
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Affiliation(s)
- Zemeng Chen
- Biomedical Engineering Institute, Chinese Academy of Medical Science and Peking Union Medical College, Tianjin 300192, China; (Z.C.)
| | - Xinliang Cao
- Biomedical Engineering Institute, Chinese Academy of Medical Science and Peking Union Medical College, Tianjin 300192, China; (Z.C.)
- School of Electromechanical and Architectural Engineering, Jianghan University, Wuhan 430056, China
| | - Xianglin Li
- State Key Laboratory of Electronic Thin Films & Integrated Devices, University of Electronic Science & Technology of China, Chengdu 611731, China
| | - Boan Pan
- State Key Laboratory of Electronic Thin Films & Integrated Devices, University of Electronic Science & Technology of China, Chengdu 611731, China
| | - Pengbo Wang
- State Key Laboratory of Electronic Thin Films & Integrated Devices, University of Electronic Science & Technology of China, Chengdu 611731, China
| | - Ting Li
- Biomedical Engineering Institute, Chinese Academy of Medical Science and Peking Union Medical College, Tianjin 300192, China; (Z.C.)
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Semyachkina-Glushkovskaya O, Fedosov I, Zaikin A, Ageev V, Ilyukov E, Myagkov D, Tuktarov D, Blokhina I, Shirokov A, Terskov A, Zlatogorskaya D, Adushkina V, Evsukova A, Dubrovsky A, Tsoy M, Telnova V, Manzhaeva M, Dmitrenko A, Krupnova V, Kurths J. Technology of the photobiostimulation of the brain's drainage system during sleep for improvement of learning and memory in male mice. BIOMEDICAL OPTICS EXPRESS 2024; 15:44-58. [PMID: 38223185 PMCID: PMC10783921 DOI: 10.1364/boe.505618] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 11/17/2023] [Accepted: 11/20/2023] [Indexed: 01/16/2024]
Abstract
In this study on healthy male mice using confocal imaging of dye spreading in the brain and its further accumulation in the peripheral lymphatics, we demonstrate stronger effects of photobiomodulation (PBM) on the brain's drainage system in sleeping vs. awake animals. Using the Pavlovian instrumental transfer probe and the 2-objects-location test, we found that the 10-day course of PBM during sleep vs. wakefulness promotes improved learning and spatial memory in mice. For the first time, we present the technology for PBM under electroencephalographic (EEG) control that incorporates modern state of the art facilities of optoelectronics and biopotential detection and that can be built of relatively cheap and commercially available components. These findings open a new niche in the development of smart technologies for phototherapy of brain diseases during sleep.
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Affiliation(s)
- Oxana Semyachkina-Glushkovskaya
- Department of Biology, Saratov State University, Astrakhanskaya Str. 83, 410012 Saratov, Russia
- Physics Department, Humboldt University, Newtonstrasse 15, 12489 Berlin, Germany
| | - Ivan Fedosov
- Institute of Physics, Saratov State University Astrakhanskaya Str. 83, 410012 Saratov, Russia
| | - Alexey Zaikin
- Department of Mathematics and Institute for Women's Health, University College London, 25 Gordon Street, London, WC1H 0AY, UK
- Centre for Analysis of Complex Systems, Sechenov First Moscow State Medical University, Bolshaya Pirogovskaya 2, building 4, 119435 Moscow, Russia
- Institute for Cognitive Neuroscience, University Higher School of Economics, Moscow, Russia
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, China
| | - Vasily Ageev
- Institute of Physics, Saratov State University Astrakhanskaya Str. 83, 410012 Saratov, Russia
| | - Egor Ilyukov
- Institute of Physics, Saratov State University Astrakhanskaya Str. 83, 410012 Saratov, Russia
| | - Dmitry Myagkov
- Institute of Physics, Saratov State University Astrakhanskaya Str. 83, 410012 Saratov, Russia
| | - Dmitry Tuktarov
- Institute of Physics, Saratov State University Astrakhanskaya Str. 83, 410012 Saratov, Russia
| | - Inna Blokhina
- Department of Biology, Saratov State University, Astrakhanskaya Str. 83, 410012 Saratov, Russia
| | - Alexander Shirokov
- Department of Biology, Saratov State University, Astrakhanskaya Str. 83, 410012 Saratov, Russia
- Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences, Prospekt Entuziastov 13, Saratov 410049, Russia
| | - Andrey Terskov
- Department of Biology, Saratov State University, Astrakhanskaya Str. 83, 410012 Saratov, Russia
| | - Daria Zlatogorskaya
- Department of Biology, Saratov State University, Astrakhanskaya Str. 83, 410012 Saratov, Russia
| | - Viktoria Adushkina
- Department of Biology, Saratov State University, Astrakhanskaya Str. 83, 410012 Saratov, Russia
| | - Arina Evsukova
- Department of Biology, Saratov State University, Astrakhanskaya Str. 83, 410012 Saratov, Russia
| | - Alexander Dubrovsky
- Institute of Physics, Saratov State University Astrakhanskaya Str. 83, 410012 Saratov, Russia
| | - Maria Tsoy
- Institute of Physics, Saratov State University Astrakhanskaya Str. 83, 410012 Saratov, Russia
| | - Valeria Telnova
- Department of Biology, Saratov State University, Astrakhanskaya Str. 83, 410012 Saratov, Russia
| | - Maria Manzhaeva
- Department of Biology, Saratov State University, Astrakhanskaya Str. 83, 410012 Saratov, Russia
| | - Alexander Dmitrenko
- Department of Biology, Saratov State University, Astrakhanskaya Str. 83, 410012 Saratov, Russia
| | - Valeria Krupnova
- Department of Biology, Saratov State University, Astrakhanskaya Str. 83, 410012 Saratov, Russia
| | - Jürgen Kurths
- Department of Biology, Saratov State University, Astrakhanskaya Str. 83, 410012 Saratov, Russia
- Physics Department, Humboldt University, Newtonstrasse 15, 12489 Berlin, Germany
- Centre for Analysis of Complex Systems, Sechenov First Moscow State Medical University, Bolshaya Pirogovskaya 2, building 4, 119435 Moscow, Russia
- Potsdam Institute for Climate Impact Research, Telegrafenberg A31, 14473 Potsdam, Germany
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Ferdinando H, Moradi S, Korhonen V, Kiviniemi V, Myllylä T. Altered cerebrovascular-CSF coupling in Alzheimer's Disease measured by functional near-infrared spectroscopy. Sci Rep 2023; 13:22364. [PMID: 38102188 PMCID: PMC10724150 DOI: 10.1038/s41598-023-48965-x] [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: 08/28/2023] [Accepted: 12/01/2023] [Indexed: 12/17/2023] Open
Abstract
In-vivo microscopical studies indicate that brain cerebrospinal fluid (CSF) transport driven by blood vessel pulsations is reduced in the early stages of Alzheimer's disease (AD). We hypothesized that the coupling pattern between cerebrovascular pulsations and CSF is altered in AD, and this can be measured using multi-wavelength functional near-infrared spectroscopy (fNIRS). To study this, we quantified simultaneously cerebral hemo- and CSF hydrodynamics in early AD patients and age-matched healthy controls. Physiological pulsations were analysed in the vasomotor very low frequency (VLF 0.008-0.1 Hz), respiratory (Resp. 0.1-0.6 Hz), and cardiac (Card. 0.6-5 Hz) bands. A sliding time window cross-correlation approach was used to estimate the temporal stability of the cerebrovascular-CSF coupling. We investigated how the lag time series variation of the coupling differs between AD patients and control. The couplings involving deoxyhemoglobin (HbR) and CSF water, along with their first derivative, in the cardiac band demonstrated significant difference between AD patients and controls. Furthermore, the lag time series variation of HbR-CSF in the cardiac band provided a significant relationship, p-value = 0.04 and r2 = 0.16, with the mini-mental state exam (MMSE) score. In conclusion, the coupling pattern between hemodynamics and CSF is reduced in AD and it correlates with MMSE score.
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Affiliation(s)
- Hany Ferdinando
- Research Unit of Health Science and Technology, University of Oulu, Oulu, Finland.
| | - Sadegh Moradi
- Opto-Electronics and Measurement Technique Research Unit, University of Oulu, Oulu, Finland
| | - Vesa Korhonen
- Research Unit of Health Science and Technology, University of Oulu, Oulu, Finland
- Department of Radiology, Oulu University Hospital, Oulu, Finland
| | - Vesa Kiviniemi
- Research Unit of Health Science and Technology, University of Oulu, Oulu, Finland
- Department of Radiology, Oulu University Hospital, Oulu, Finland
| | - Teemu Myllylä
- Research Unit of Health Science and Technology, University of Oulu, Oulu, Finland
- Opto-Electronics and Measurement Technique Research Unit, University of Oulu, Oulu, Finland
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Wang X, Delle C, Peng W, Plá V, Giannetto M, Kusk P, Sigurdsson B, Sakurai S, Sweeney A, Sun Q, Du T, Libby RT, Nedergaard M. Age- and glaucoma-induced changes to the ocular glymphatic system. Neurobiol Dis 2023; 188:106322. [PMID: 37832797 DOI: 10.1016/j.nbd.2023.106322] [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: 09/09/2023] [Revised: 10/11/2023] [Accepted: 10/11/2023] [Indexed: 10/15/2023] Open
Abstract
The ocular glymphatic system supports bidirectional fluid transport along the optic nerve, thereby removes metabolic wastes including amyloid-β. To better understand this biological process, we examined the distributions of intravitreally and intracisternally infused tracers in full-length optic nerves from different age groups of mice. Aging was linked to globally impaired ocular glymphatic fluid transport, similar to what has seen previously in the brain. Aging also reduced the pupillary responsiveness to light stimulation and abolished light-induced facilitation in anterograde ocular glymphatic flow. In contrast to normal aging, in the DBA/2 J model of glaucoma, we found a pathological increase of glymphatic fluid transport to the anterior optic nerve that was associated with dilation of the perivascular spaces. Thus, aging and glaucoma have fundamentally different effects on ocular glymphatic fluid transport. Manipulation of glymphatic fluid transport might therefore present a new target for the treatment of glaucoma.
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Affiliation(s)
- Xiaowei Wang
- Center for Translational Neuromedicine, Faculty of Medical and Health Sciences, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen N, Denmark; Center for Translational Neuromedicine, University of Rochester Medical School, Elmwood Avenue 601, Rochester, NY 14642, USA.
| | - Christine Delle
- Center for Translational Neuromedicine, Faculty of Medical and Health Sciences, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen N, Denmark
| | - Weiguo Peng
- Center for Translational Neuromedicine, Faculty of Medical and Health Sciences, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen N, Denmark; Center for Translational Neuromedicine, University of Rochester Medical School, Elmwood Avenue 601, Rochester, NY 14642, USA
| | - Virginia Plá
- Center for Translational Neuromedicine, Faculty of Medical and Health Sciences, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen N, Denmark
| | - Michael Giannetto
- Center for Translational Neuromedicine, University of Rochester Medical School, Elmwood Avenue 601, Rochester, NY 14642, USA; Neuroscience Graduate Program, University of Rochester Medical School, Elmwood Avenue 601, Rochester, NY 14642, USA
| | - Peter Kusk
- Center for Translational Neuromedicine, Faculty of Medical and Health Sciences, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen N, Denmark
| | - Björn Sigurdsson
- Center for Translational Neuromedicine, Faculty of Medical and Health Sciences, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen N, Denmark
| | - Shinya Sakurai
- Center for Translational Neuromedicine, University of Rochester Medical School, Elmwood Avenue 601, Rochester, NY 14642, USA
| | - Amanda Sweeney
- Center for Translational Neuromedicine, University of Rochester Medical School, Elmwood Avenue 601, Rochester, NY 14642, USA
| | - Qian Sun
- Center for Translational Neuromedicine, University of Rochester Medical School, Elmwood Avenue 601, Rochester, NY 14642, USA
| | - Ting Du
- Center for Translational Neuromedicine, University of Rochester Medical School, Elmwood Avenue 601, Rochester, NY 14642, USA
| | - Richard T Libby
- Department of Ophthalmology, University of Rochester Medical Center, Elmwood Avenue 601, Rochester, NY 14642, USA
| | - Maiken Nedergaard
- Center for Translational Neuromedicine, Faculty of Medical and Health Sciences, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen N, Denmark; Center for Translational Neuromedicine, University of Rochester Medical School, Elmwood Avenue 601, Rochester, NY 14642, USA.
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Mahler S, Huang YX, Liang M, Avalos A, Tyszka JM, Mertz J, Yang C. Assessing depth sensitivity in laser interferometry speckle visibility spectroscopy (iSVS) through source-to-detector distance variation and cerebral blood flow monitoring in humans and rabbits. BIOMEDICAL OPTICS EXPRESS 2023; 14:4964-4978. [PMID: 37791277 PMCID: PMC10545208 DOI: 10.1364/boe.498815] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 08/16/2023] [Accepted: 08/17/2023] [Indexed: 10/05/2023]
Abstract
Recently, speckle visibility spectroscopy (SVS) was non-invasively applied on the head to monitor cerebral blood flow. The technique, using a multi-pixel detecting device (e.g., camera), allows the detection of a larger number of speckles, increasing the proportion of light that is detected. Due to this increase, it is possible to collect light that has propagated deeper through the brain. As a direct consequence, cerebral blood flow can be monitored. However, isolating the cerebral blood flow from the other layers, such as the scalp or skull components, remains challenging. In this paper, we report our investigations on the depth-sensitivity of laser interferometry speckle visibility spectroscopy (iSVS). Specifically, we varied the depth of penetration of the laser light into the head by tuning the source-to-detector distance, and identified the transition point at which cerebral blood flow in humans and rabbits starts to be detected.
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Affiliation(s)
- Simon Mahler
- Department of Electrical Engineering, California Institute of Technology, Pasadena, California 91125, USA
| | - Yu Xi Huang
- Department of Electrical Engineering, California Institute of Technology, Pasadena, California 91125, USA
| | - Mingshu Liang
- Department of Electrical Engineering, California Institute of Technology, Pasadena, California 91125, USA
| | - Alan Avalos
- Office of Laboratory Animal Resources (OLAR), California Institute of Technology, Pasadena, California 91125, USA
| | - Julian M. Tyszka
- Division of Humanities and Social Sciences, California Institute of Technology, Pasadena, California 91125, USA
| | - Jerome Mertz
- Department of Biomedical Engineering, Boston University, Boston, Massachusetts 02215, USA
- Neurophotonics Center, Boston University, Boston, Massachusetts 02215, USA
| | - Changhuei Yang
- Department of Electrical Engineering, California Institute of Technology, Pasadena, California 91125, USA
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Ding Z, Fan X, Zhang Y, Yao M, Wang G, Dong Y, Liu J, Song W. The glymphatic system: a new perspective on brain diseases. Front Aging Neurosci 2023; 15:1179988. [PMID: 37396658 PMCID: PMC10308198 DOI: 10.3389/fnagi.2023.1179988] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2023] [Accepted: 05/29/2023] [Indexed: 07/04/2023] Open
Abstract
The glymphatic system is a brain-wide perivascular pathway driven by aquaporin-4 on the endfeet of astrocytes, which can deliver nutrients and active substances to the brain parenchyma through periarterial cerebrospinal fluid (CSF) influx pathway and remove metabolic wastes through perivenous clearance routes. This paper summarizes the composition, overall fluid flow, solute transport, related diseases, affecting factors, and preclinical research methods of the glymphatic system. In doing so, we aim to provide direction and reference for more relevant researchers in the future.
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Srinivasan S, Butters E, Collins-Jones L, Su L, O’Brien J, Bale G. Illuminating neurodegeneration: a future perspective on near-infrared spectroscopy in dementia research. NEUROPHOTONICS 2023; 10:023514. [PMID: 36788803 PMCID: PMC9917719 DOI: 10.1117/1.nph.10.2.023514] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Accepted: 01/13/2023] [Indexed: 06/18/2023]
Abstract
SIGNIFICANCE Dementia presents a global healthcare crisis, and neuroimaging is the main method for developing effective diagnoses and treatments. Yet currently, there is a lack of sensitive, portable, and low-cost neuroimaging tools. As dementia is associated with vascular and metabolic dysfunction, near-infrared spectroscopy (NIRS) has the potential to fill this gap. AIM This future perspective aims to briefly review the use of NIRS in dementia to date and identify the challenges involved in realizing the full impact of NIRS for dementia research, including device development, study design, and data analysis approaches. APPROACH We briefly appraised the current literature to assess the challenges, giving a critical analysis of the methods used. To assess the sensitivity of different NIRS device configurations to the brain with atrophy (as is common in most forms of dementia), we performed an optical modeling analysis to compare their cortical sensitivity. RESULTS The first NIRS dementia study was published in 1996, and the number of studies has increased over time. In general, these studies identified diminished hemodynamic responses in the frontal lobe and altered functional connectivity in dementia. Our analysis showed that traditional (low-density) NIRS arrays are sensitive to the brain with atrophy (although we see a mean decrease of 22% in the relative brain sensitivity with respect to the healthy brain), but there is a significant improvement (a factor of 50 sensitivity increase) with high-density arrays. CONCLUSIONS NIRS has a bright future in dementia research. Advances in technology - high-density devices and intelligent data analysis-will allow new, naturalistic task designs that may have more clinical relevance and increased reproducibility for longitudinal studies. The portable and low-cost nature of NIRS provides the potential for use in clinical and screening tests.
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Affiliation(s)
- Sruthi Srinivasan
- University of Cambridge, Department of Engineering, Electrical Engineering, Cambridge, United Kingdom
| | - Emilia Butters
- University of Cambridge, Department of Engineering, Electrical Engineering, Cambridge, United Kingdom
- University of Cambridge, Department of Psychiatry, Cambridge, United Kingdom
| | - Liam Collins-Jones
- University College London, Department of Medical Physics, London, United Kingdom
| | - Li Su
- University of Cambridge, Department of Psychiatry, Cambridge, United Kingdom
- University of Sheffield, Department of Neuroscience, Sheffield, United Kingdom
| | - John O’Brien
- University of Cambridge, Department of Psychiatry, Cambridge, United Kingdom
| | - Gemma Bale
- University of Cambridge, Department of Engineering, Electrical Engineering, Cambridge, United Kingdom
- University of Cambridge, Department of Physics, Cambridge, United Kingdom
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Myllylä T, Korhonen V, Karthikeyan P, Honka U, Lohela J, Inget K, Ferdinando H, Karhula SS, Nikkinen J. Cerebral tissue oxygenation response to brain irradiation measured during clinical radiotherapy. JOURNAL OF BIOMEDICAL OPTICS 2023; 28:015002. [PMID: 36742351 PMCID: PMC9887167 DOI: 10.1117/1.jbo.28.1.015002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Accepted: 12/01/2022] [Indexed: 06/18/2023]
Abstract
SIGNIFICANCE Cancer therapy treatments produce extensive changes in the physiological and morphological properties of tissues, which are also individual dependent. Currently, a key challenge involves developing more tailored cancer therapy, and consequently, individual biological response measurement during therapy, such as tumor hypoxia, is of high interest. This is the first time human cerebral haemodynamics and cerebral tissue oxygenation index (TOI) changes were measured during the irradiation in clinical radiotherapy and functional near-infrared spectroscopy (fNIRS) technique was demonstrated as a feasible technique for clinical use in radiotherapy, based on 34 online patient measurements. AIM Our aim is to develop predictive biomarkers and noninvasive real-time methods to establish the effect of radiotherapy during treatment as well as to optimize radiotherapy dose planning for individual patients. In particular, fNIRS-based technique could offer an effective and clinically feasible online technique for continuous monitoring of brain tissue hypoxia and responses to chemo- and radiotherapy, which involves modulating tumor oxygenation to increase or decrease tumor hypoxia. We aim to show that fNIRS is feasible for repeatability measuring in patient radiotherapy, the temporal alterations of tissue oxygenation induced by radiation. APPROACH Fiber optics setup using multiwavelength fNIRS was built and combined with a medical linear accelerator to measure cerebral tissue oxygenation changes during the whole-brain radiotherapy treatment, where the radiation dose is given in whole brain area only preventing dosage to eyes. Correlation of temporal alterations in cerebral haemodynamics and TOI response to brain irradiation was quantified. RESULTS Online fNIRS patient measurement of cerebral haemodynamics during clinical brain radiotherapy is feasible in clinical environment, and results based on 34 patient measurements show strong temporal alterations in cerebral haemodynamics and decrease in TOI during brain irradiation and confirmed the repeatability. Our proof-of-concept study shows evidently that irradiation causes characteristic immediate changes in brain tissue oxygenation. CONCLUSIONS In particular, TOI seems to be a sensitive parameter to observe the tissue effects of radiotherapy. Monitoring the real-time interactions between the subjected radiation dose and corresponding haemodynamic effects may provide important tool for the researchers and clinicians in the field of radiotherapy. Eventually, presented fNIRS technique could be used for improving dose planning and safety control for individual patients.
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Affiliation(s)
- Teemu Myllylä
- University of Oulu, Research Unit of Health Sciences and Technology, Oulu, Finland
- University of Oulu, Optoelectronics and Measurement Techniques Unit, Oulu, Finland
| | - Vesa Korhonen
- University of Oulu, Research Unit of Health Sciences and Technology, Oulu, Finland
- Oulu University Hospital, Department of Diagnostic Radiology, Oulu, Finland
- Medical Research Center, Oulu, Finland
| | - Priya Karthikeyan
- University of Oulu, Research Unit of Health Sciences and Technology, Oulu, Finland
| | - Ulriika Honka
- University of Oulu, Research Unit of Health Sciences and Technology, Oulu, Finland
| | - Jesse Lohela
- University of Oulu, Research Unit of Health Sciences and Technology, Oulu, Finland
- Oulu University Hospital, Department of Oncology and Radiotherapy, Oulu, Finland
| | - Kalle Inget
- University of Oulu, Research Unit of Health Sciences and Technology, Oulu, Finland
- Medical Research Center, Oulu, Finland
| | - Hany Ferdinando
- University of Oulu, Research Unit of Health Sciences and Technology, Oulu, Finland
| | - Sakari S. Karhula
- University of Oulu, Research Unit of Health Sciences and Technology, Oulu, Finland
- Medical Research Center, Oulu, Finland
- Oulu University Hospital, Department of Oncology and Radiotherapy, Oulu, Finland
| | - Juha Nikkinen
- University of Oulu, Research Unit of Health Sciences and Technology, Oulu, Finland
- Medical Research Center, Oulu, Finland
- Oulu University Hospital, Department of Oncology and Radiotherapy, Oulu, Finland
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Taga G, Watanabe H. Neurovascular, Metabolic, and Glymphatic Dynamics of the Brain Measured with fNIRS. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2023; 1438:197-202. [PMID: 37845461 DOI: 10.1007/978-3-031-42003-0_31] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2023]
Abstract
We developed a multidistance and multiwavelength continuous wave NIRS instrument to detect dynamic changes in oxygenated and deoxygenated hemoglobin (oxy- and deoxy-Hb), oxidized cytochrome-c-oxidase (oxCCO) and water of the brain and muscle. We performed measurements of the forehead during resting state and paced breathing and of the forearm during ischemic challenge in human adults. Time series analysis focusing on rhythmic signals over different time scales and different depths of the tissue revealed specific patterns of phase relationships among the signals in each of the measurement. This method can be a promising tool to understand the dynamic interaction among the neurovascular, metabolic and glymphatic system in a wide variety of subject fields.
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Affiliation(s)
- Gentaro Taga
- Graduate School of Education, The University of Tokyo, Tokyo, Japan.
| | - Hama Watanabe
- Graduate School of Education, The University of Tokyo, Tokyo, Japan
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Yu L, Hu X, Li H, Zhao Y. Perivascular Spaces, Glymphatic System and MR. Front Neurol 2022; 13:844938. [PMID: 35592469 PMCID: PMC9110928 DOI: 10.3389/fneur.2022.844938] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Accepted: 03/28/2022] [Indexed: 12/29/2022] Open
Abstract
The importance of the perivascular space (PVS) as one of the imaging markers of cerebral small vessel disease (CSVD) has been widely appreciated by the neuroradiologists. The PVS surrounds the small blood vessels in the brain and has a signal consistent with the cerebrospinal fluid (CSF) on MR. In a variety of physio-pathological statuses, the PVS may expand. The discovery of the cerebral glymphatic system has provided a revolutionary perspective to elucidate its pathophysiological mechanisms. Research on the function and pathogenesis of this system has become a prevalent topic among neuroradiologists. It is now believed that this system carries out the similar functions as the lymphatic system in other parts of the body and plays an important role in the removal of metabolic waste and the maintenance of homeostatic fluid circulation in the brain. In this article, we will briefly describe the composition of the cerebral glymphatic system, the influencing factors, the MR manifestations of the PVS and the related imaging technological advances. The aim of this research is to provide a reference for future clinical studies of the PVS and glymphatic system.
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Affiliation(s)
- Linya Yu
- Department of Radiology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Xiaofei Hu
- Department of Radiology, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
| | - Haitao Li
- Department of Radiology, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
- Haitao Li
| | - Yilei Zhao
- Department of Radiology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
- *Correspondence: Yilei Zhao
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Wang X, Lou N, Eberhardt A, Yang Y, Kusk P, Xu Q, Förstera B, Peng S, Shi M, Ladrón-de-Guevara A, Delle C, Sigurdsson B, Xavier ALR, Ertürk A, Libby RT, Chen L, Thrane AS, Nedergaard M. An ocular glymphatic clearance system removes β-amyloid from the rodent eye. Sci Transl Med 2021; 12:12/536/eaaw3210. [PMID: 32213628 DOI: 10.1126/scitranslmed.aaw3210] [Citation(s) in RCA: 118] [Impact Index Per Article: 39.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Revised: 08/24/2019] [Accepted: 12/30/2019] [Indexed: 12/31/2022]
Abstract
Despite high metabolic activity, the retina and optic nerve head lack traditional lymphatic drainage. We here identified an ocular glymphatic clearance route for fluid and wastes via the proximal optic nerve in rodents. β-amyloid (Aβ) was cleared from the retina and vitreous via a pathway dependent on glial water channel aquaporin-4 (AQP4) and driven by the ocular-cranial pressure difference. After traversing the lamina barrier, intra-axonal Aβ was cleared via the perivenous space and subsequently drained to lymphatic vessels. Light-induced pupil constriction enhanced efflux, whereas atropine or raising intracranial pressure blocked efflux. In two distinct murine models of glaucoma, Aβ leaked from the eye via defects in the lamina barrier instead of directional axonal efflux. The results suggest that, in rodents, the removal of fluid and metabolites from the intraocular space occurs through a glymphatic pathway that might be impaired in glaucoma.
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Affiliation(s)
- Xiaowei Wang
- Center for Translational Neuromedicine, Faculty of Medical and Health Sciences, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen N, Denmark.,Center for Translational Neuromedicine, University of Rochester Medical School, Elmwood Avenue 601, Rochester, NY 14642, USA
| | - Nanhong Lou
- Center for Translational Neuromedicine, University of Rochester Medical School, Elmwood Avenue 601, Rochester, NY 14642, USA
| | - Allison Eberhardt
- Center for Translational Neuromedicine, University of Rochester Medical School, Elmwood Avenue 601, Rochester, NY 14642, USA
| | - Yujia Yang
- Center for Eye Disease and Development, Vision Science Graduate Program, and School of Optometry, University of California Berkeley, Berkeley, CA 94720, USA
| | - Peter Kusk
- Center for Translational Neuromedicine, Faculty of Medical and Health Sciences, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen N, Denmark
| | - Qiwu Xu
- Center for Translational Neuromedicine, University of Rochester Medical School, Elmwood Avenue 601, Rochester, NY 14642, USA
| | - Benjamin Förstera
- Institute for Stroke and Dementia Research, Klinikum der Universität München, Ludwig Maximilians University of Munich (LMU), 81377 Munich, Germany.,Institute for Tissue Engineering and Regenerative Medicine (iTERM), Helmholtz Center München, 85764 Munich, Germany
| | - Sisi Peng
- Center for Translational Neuromedicine, University of Rochester Medical School, Elmwood Avenue 601, Rochester, NY 14642, USA
| | - Meng Shi
- Center for Eye Disease and Development, Vision Science Graduate Program, and School of Optometry, University of California Berkeley, Berkeley, CA 94720, USA
| | - Antonio Ladrón-de-Guevara
- Center for Translational Neuromedicine, University of Rochester Medical School, Elmwood Avenue 601, Rochester, NY 14642, USA
| | - Christine Delle
- Center for Translational Neuromedicine, Faculty of Medical and Health Sciences, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen N, Denmark
| | - Björn Sigurdsson
- Center for Translational Neuromedicine, Faculty of Medical and Health Sciences, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen N, Denmark
| | - Anna L R Xavier
- Center for Translational Neuromedicine, Faculty of Medical and Health Sciences, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen N, Denmark
| | - Ali Ertürk
- Institute for Stroke and Dementia Research, Klinikum der Universität München, Ludwig Maximilians University of Munich (LMU), 81377 Munich, Germany.,Institute for Tissue Engineering and Regenerative Medicine (iTERM), Helmholtz Center München, 85764 Munich, Germany
| | - Richard T Libby
- Department of Ophthalmology, University of Rochester Medical Center, Rochester, NY 14642, USA
| | - Lu Chen
- Center for Eye Disease and Development, Vision Science Graduate Program, and School of Optometry, University of California Berkeley, Berkeley, CA 94720, USA.
| | - Alexander S Thrane
- Center for Translational Neuromedicine, Faculty of Medical and Health Sciences, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen N, Denmark.,Department of Ophthalmology, Haukeland University Hospital, Jonas Lies Vei 65, 5021 Bergen, Norway
| | - Maiken Nedergaard
- Center for Translational Neuromedicine, Faculty of Medical and Health Sciences, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen N, Denmark. .,Center for Translational Neuromedicine, University of Rochester Medical School, Elmwood Avenue 601, Rochester, NY 14642, USA
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12
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Ren X, Liu S, Lian C, Li H, Li K, Li L, Zhao G. Dysfunction of the Glymphatic System as a Potential Mechanism of Perioperative Neurocognitive Disorders. Front Aging Neurosci 2021; 13:659457. [PMID: 34163349 PMCID: PMC8215113 DOI: 10.3389/fnagi.2021.659457] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Accepted: 05/18/2021] [Indexed: 12/21/2022] Open
Abstract
Perioperative neurocognitive disorder (PND) frequently occurs in the elderly as a severe postoperative complication and is characterized by a decline in cognitive function that impairs memory, attention, and other cognitive domains. Currently, the exact pathogenic mechanism of PND is multifaceted and remains unclear. The glymphatic system is a newly discovered glial-dependent perivascular network that subserves a pseudo-lymphatic function in the brain. Recent studies have highlighted the significant role of the glymphatic system in the removal of harmful metabolites in the brain. Dysfunction of the glymphatic system can reduce metabolic waste removal, leading to neuroinflammation and neurological disorders. We speculate that there is a causal relationship between the glymphatic system and symptomatic progression in PND. This paper reviews the current literature on the glymphatic system and some perioperative factors to discuss the role of the glymphatic system in PND.
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Affiliation(s)
- Xuli Ren
- Department of Anaesthesiology, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Shan Liu
- Department of Neurology, First Affiliated Hospital of Jilin University, Changchun, China
| | - Chuang Lian
- Department of Anaesthesiology, Jilin City People's Hospital, Jilin, China
| | - Haixia Li
- Department of Neurology, First Affiliated Hospital of Jilin University, Changchun, China
| | - Kai Li
- Department of Anaesthesiology, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Longyun Li
- Department of Anaesthesiology, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Guoqing Zhao
- Department of Anaesthesiology, China-Japan Union Hospital of Jilin University, Changchun, China.,Jilin University, Changchun, China
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13
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Novel PET Biomarkers to Disentangle Molecular Pathways across Age-Related Neurodegenerative Diseases. Cells 2020; 9:cells9122581. [PMID: 33276490 PMCID: PMC7761606 DOI: 10.3390/cells9122581] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 11/25/2020] [Accepted: 11/28/2020] [Indexed: 12/11/2022] Open
Abstract
There is a need to disentangle the etiological puzzle of age-related neurodegenerative diseases, whose clinical phenotypes arise from known, and as yet unknown, pathways that can act distinctly or in concert. Enhanced sub-phenotyping and the identification of in vivo biomarker-driven signature profiles could improve the stratification of patients into clinical trials and, potentially, help to drive the treatment landscape towards the precision medicine paradigm. The rapidly growing field of neuroimaging offers valuable tools to investigate disease pathophysiology and molecular pathways in humans, with the potential to capture the whole disease course starting from preclinical stages. Positron emission tomography (PET) combines the advantages of a versatile imaging technique with the ability to quantify, to nanomolar sensitivity, molecular targets in vivo. This review will discuss current research and available imaging biomarkers evaluating dysregulation of the main molecular pathways across age-related neurodegenerative diseases. The molecular pathways focused on in this review involve mitochondrial dysfunction and energy dysregulation; neuroinflammation; protein misfolding; aggregation and the concepts of pathobiology, synaptic dysfunction, neurotransmitter dysregulation and dysfunction of the glymphatic system. The use of PET imaging to dissect these molecular pathways and the potential to aid sub-phenotyping will be discussed, with a focus on novel PET biomarkers.
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14
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Hennig J, Kiviniemi V, Riemenschneider B, Barghoorn A, Akin B, Wang F, LeVan P. 15 Years MR-encephalography. MAGNETIC RESONANCE MATERIALS IN PHYSICS BIOLOGY AND MEDICINE 2020; 34:85-108. [PMID: 33079327 PMCID: PMC7910380 DOI: 10.1007/s10334-020-00891-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 09/02/2020] [Accepted: 09/29/2020] [Indexed: 02/07/2023]
Abstract
Objective This review article gives an account of the development of the MR-encephalography (MREG) method, which started as a mere ‘Gedankenexperiment’ in 2005 and gradually developed into a method for ultrafast measurement of physiological activities in the brain. After going through different approaches covering k-space with radial, rosette, and concentric shell trajectories we have settled on a stack-of-spiral trajectory, which allows full brain coverage with (nominal) 3 mm isotropic resolution in 100 ms. The very high acceleration factor is facilitated by the near-isotropic k-space coverage, which allows high acceleration in all three spatial dimensions. Methods The methodological section covers the basic sequence design as well as recent advances in image reconstruction including the targeted reconstruction, which allows real-time feedback applications, and—most recently—the time-domain principal component reconstruction (tPCR), which applies a principal component analysis of the acquired time domain data as a sparsifying transformation to improve reconstruction speed as well as quality. Applications Although the BOLD-response is rather slow, the high speed acquisition of MREG allows separation of BOLD-effects from cardiac and breathing related pulsatility. The increased sensitivity enables direct detection of the dynamic variability of resting state networks as well as localization of single interictal events in epilepsy patients. A separate and highly intriguing application is aimed at the investigation of the glymphatic system by assessment of the spatiotemporal patterns of cardiac and breathing related pulsatility. Discussion MREG has been developed to push the speed limits of fMRI. Compared to multiband-EPI this allows considerably faster acquisition at the cost of reduced image quality and spatial resolution.
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Affiliation(s)
- Juergen Hennig
- Department of Radiology, Medical Physics, Faculty of Medicine, Medical Center University of Freiburg, University of Freiburg, Freiburg, Germany. .,Center for Basics in NeuroModulation (NeuroModulBasics), Faculty of Medicine, University of Freiburg, Freiburg, Germany.
| | - Vesa Kiviniemi
- Oulu Functional NeuroImaging Group, Research Unit of Medical Imaging, Physics and Technology, University of Oulu, Oulu, Finland
| | - Bruno Riemenschneider
- Department of Radiology, Center for Biomedical Imaging, New York University Grossman School of Medicine, New York, NY, USA
| | - Antonia Barghoorn
- Department of Radiology, Medical Physics, Faculty of Medicine, Medical Center University of Freiburg, University of Freiburg, Freiburg, Germany.,Center for Basics in NeuroModulation (NeuroModulBasics), Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Burak Akin
- Department of Radiology, Medical Physics, Faculty of Medicine, Medical Center University of Freiburg, University of Freiburg, Freiburg, Germany.,Center for Basics in NeuroModulation (NeuroModulBasics), Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Fei Wang
- Department of Radiology, Medical Physics, Faculty of Medicine, Medical Center University of Freiburg, University of Freiburg, Freiburg, Germany.,Center for Basics in NeuroModulation (NeuroModulBasics), Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Pierre LeVan
- Departments of Radiology and Paediatrics, Hotchkiss Brain Institute and Alberta Children's Hospital Research Institute, University of Calgary, Calgary, AB, Canada
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15
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Optics Based Label-Free Techniques and Applications in Brain Monitoring. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10062196] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Functional near-infrared spectroscopy (fNIRS) has been utilized already around three decades for monitoring the brain, in particular, oxygenation changes in the cerebral cortex. In addition, other optical techniques are currently developed for in vivo imaging and in the near future can be potentially used more in human brain research. This paper reviews the most common label-free optical technologies exploited in brain monitoring and their current and potential clinical applications. Label-free tissue monitoring techniques do not require the addition of dyes or molecular contrast agents. The following optical techniques are considered: fNIRS, diffuse correlations spectroscopy (DCS), photoacoustic imaging (PAI) and optical coherence tomography (OCT). Furthermore, wearable optical brain monitoring with the most common applications is discussed.
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16
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Semyachkina‐Glushkovskaya O, Abdurashitov A, Klimova M, Dubrovsky A, Shirokov A, Fomin A, Terskov A, Agranovich I, Mamedova A, Khorovodov A, Vinnik V, Blokhina I, Lezhnev N, Shareef AE, Kuzmina A, Sokolovski S, Tuchin V, Rafailov E, Kurths J. Photostimulation of cerebral and peripheral lymphatic functions. TRANSLATIONAL BIOPHOTONICS 2020. [DOI: 10.1002/tbio.201900036] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Affiliation(s)
| | | | | | | | - Alexander Shirokov
- Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences Saratov Russia
| | - Alexander Fomin
- Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences Saratov Russia
| | | | | | | | | | | | | | | | | | | | - Sergey Sokolovski
- Saratov State University Saratov Russia
- Optoelectronics and Biomedical Photonics GroupAston University Birmingham UK
| | - Valery Tuchin
- Saratov State University Saratov Russia
- Institute of Precision Mechanics and Control, Russian Academy of Science Saratov Russia
- Tomsk State University Tomsk Russia
| | - Edik Rafailov
- Saratov State University Saratov Russia
- Optoelectronics and Biomedical Photonics GroupAston University Birmingham UK
| | - Jurgen Kurths
- Saratov State University Saratov Russia
- Humboldt University Berlin Germany
- Institute of Climate Impact Research Potsdam Germany
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17
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Abstract
Astrocytes are critical for maintaining the homeostasis of the CNS. Increasing evidence suggests that a number of neurological and neuropsychiatric disorders, including chronic pain, may result from astrocyte 'gliopathy'. Indeed, in recent years there has been substantial progress in our understanding of how astrocytes can regulate nociceptive synaptic transmission via neuronal-glial and glial-glial cell interactions, as well as the involvement of spinal and supraspinal astrocytes in the modulation of pain signalling and the maintenance of neuropathic pain. A role of astrocytes in the pathogenesis of chronic itch is also emerging. These developments suggest that targeting the specific pathways that are responsible for astrogliopathy may represent a novel approach to develop therapies for chronic pain and chronic itch.
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18
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Jiang B, Hou W, Xia N, Peng F, Wang X, Chen C, Zhou Y, Zheng X, Wu X. Inhibitory effect of 980-nm laser on neural activity of the rat's cochlear nucleus. NEUROPHOTONICS 2019; 6:035009. [PMID: 31482103 PMCID: PMC6710856 DOI: 10.1117/1.nph.6.3.035009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Accepted: 07/18/2019] [Indexed: 06/10/2023]
Abstract
Near-infrared radiation (NIR) has been described as one of the highest-resolution tools for neuromodulation. However, the poor tissue penetration depth of NIR has limited its further application on some of the deeper layer neurons in vivo. A 980-nm short-wavelength NIR (SW-NIR) with high penetration depth was employed, and its inhibitory effect on neurons was investigated in vivo. In experiments, SW-NIR was implemented on the rat's cochlear nucleus (CN), the auditory pathway was activated by pure-tones through the rat's external auditory canal, and the neural responses were recorded in the inferior colliculus by a multichannel electrode array. Neural firing rate (FR) and the first spike latency (FSL) were analyzed to evaluate the optically induced neural inhibition. Meanwhile, a two-layered finite element, consisting of a fluid layer and a gray matter layer, was established to model the optically induced temperature changes in CN; different stimulation paradigms were used to compare the inhibitory efficiency of SW-NIR. Results showed that SW-NIR could reversibly inhibit acoustically induced CN neural activities: with the increase of laser radiant exposures energy, neural FR decreased significantly and FSL lengthened steadily. Significant inhibition occurred when the optical pulse stimulated prior to the acoustic stimulus. Results indicated that the inhibition relies on the establishment time of the temperature field. Moreover, our preliminary results suggest that short-wavelength infrared could regulate the activities of neurons beyond the neural tissues laser irradiated through neural networks and conduction in vivo. These findings may provide a method for accurate neuromodulation in vivo.
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Affiliation(s)
- Bin Jiang
- Chongqing University, Ministry of Education, Key Laboratory of Biorheological Science and Technology, Chongqing, China
| | - Wensheng Hou
- Chongqing University, Ministry of Education, Key Laboratory of Biorheological Science and Technology, Chongqing, China
- Chongqing University, Chongqing Collaborative Innovation Center for Brain Science, China
- Chongqing University, Chongqing Key Laboratory of Artificial Intelligence and Service Robot Control Technology, Chongqing, China
| | - Nan Xia
- Chongqing University, Ministry of Education, Key Laboratory of Biorheological Science and Technology, Chongqing, China
- Qingdao University, Shandong Provincial Key Laboratory of Digital Medicine and Computer-assisted Surgery, Qingdao, Shandong, China
| | - Fei Peng
- Chongqing University, Ministry of Education, Key Laboratory of Biorheological Science and Technology, Chongqing, China
| | - Xing Wang
- Chongqing University, Ministry of Education, Key Laboratory of Biorheological Science and Technology, Chongqing, China
- Chongqing University, Chongqing Collaborative Innovation Center for Brain Science, China
| | - Chunye Chen
- Chongqing University, Ministry of Education, Key Laboratory of Biorheological Science and Technology, Chongqing, China
- Chongqing University, Chongqing Collaborative Innovation Center for Brain Science, China
| | - Yi Zhou
- Chinese Army Medical University, Department of Neurobiology, Chongqing Key Laboratory of Neurobiology, Chongqing, China
| | - Xiaolin Zheng
- Chongqing University, Ministry of Education, Key Laboratory of Biorheological Science and Technology, Chongqing, China
- Chongqing University, Chongqing Collaborative Innovation Center for Brain Science, China
- Chongqing University, Chongqing Key Laboratory of Artificial Intelligence and Service Robot Control Technology, Chongqing, China
| | - Xiaoying Wu
- Chongqing University, Ministry of Education, Key Laboratory of Biorheological Science and Technology, Chongqing, China
- Chongqing University, Chongqing Collaborative Innovation Center for Brain Science, China
- Chongqing University, Chongqing Key Laboratory of Artificial Intelligence and Service Robot Control Technology, Chongqing, China
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MATSUMAE M, KURODA K, YATSUSHIRO S, HIRAYAMA A, HAYASHI N, TAKIZAWA K, ATSUMI H, SORIMACHI T. Changing the Currently Held Concept of Cerebrospinal Fluid Dynamics Based on Shared Findings of Cerebrospinal Fluid Motion in the Cranial Cavity Using Various Types of Magnetic Resonance Imaging Techniques. Neurol Med Chir (Tokyo) 2019; 59:133-146. [PMID: 30814424 PMCID: PMC6465527 DOI: 10.2176/nmc.ra.2018-0272] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Accepted: 01/10/2019] [Indexed: 12/23/2022] Open
Abstract
The "cerebrospinal fluid (CSF) circulation theory" of CSF flowing unidirectionally and circulating through the ventricles and subarachnoid space in a downward or upward fashion has been widely recognized. In this review, observations of CSF motion using different magnetic resonance imaging (MRI) techniques are described, findings that are shared among these techniques are extracted, and CSF motion, as we currently understand it based on the results from the quantitative analysis of CSF motion, is discussed, along with a discussion of slower water molecule motion in the perivascular, paravascular, and brain parenchyma. Today, a shared consensus regarding CSF motion is being formed, as follows: CSF motion is not a circulatory flow, but a combination of various directions of flow in the ventricles and subarachnoid space, and the acceleration of CSF motion differs depending on the CSF space. It is now necessary to revise the currently held concept that CSF flows unidirectionally. Currently, water molecule motion in the order of centimeters per second can be detected with various MRI techniques. Thus, we need new MRI techniques with high-velocity sensitivity, such as in the order of 10 μm/s, to determine water molecule movement in the vessel wall, paravascular space, and brain parenchyma. In this paper, the authors review the previous and current concepts of CSF motion in the central nervous system using various MRI techniques.
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Affiliation(s)
- Mitsunori MATSUMAE
- Department of Neurosurgery, Tokai University School of Medicine, Isehara, Kanagawa, Japan
| | - Kagayaki KURODA
- Department of Human and Information Sciences, School of Information Science and Technology, Tokai University, Hiratsuka, Kanagawa, Japan
| | - Satoshi YATSUSHIRO
- Department of Human and Information Sciences, School of Information Science and Technology, Tokai University, Hiratsuka, Kanagawa, Japan
- BioView Inc., Tokyo, Japan
| | - Akihiro HIRAYAMA
- Department of Neurosurgery, Tokai University School of Medicine, Isehara, Kanagawa, Japan
| | - Naokazu HAYASHI
- Department of Neurosurgery, Tokai University School of Medicine, Isehara, Kanagawa, Japan
| | - Ken TAKIZAWA
- Department of Ophthalmology, Tokai University School of Medicine, Isehara, Kanagawa, Japan
| | - Hideki ATSUMI
- Department of Neurosurgery, Tokai University School of Medicine, Isehara, Kanagawa, Japan
| | - Takatoshi SORIMACHI
- Department of Neurosurgery, Tokai University School of Medicine, Isehara, Kanagawa, Japan
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20
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Xiong Y, Mahmood A, Chopp M. Current understanding of neuroinflammation after traumatic brain injury and cell-based therapeutic opportunities. Chin J Traumatol 2018; 21:137-151. [PMID: 29764704 PMCID: PMC6034172 DOI: 10.1016/j.cjtee.2018.02.003] [Citation(s) in RCA: 117] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Revised: 03/02/2018] [Accepted: 03/05/2018] [Indexed: 02/04/2023] Open
Abstract
Traumatic brain injury (TBI) remains a major cause of death and disability worldwide. Increasing evidence indicates that TBI is an important risk factor for neurodegenerative diseases including Alzheimer's disease, Parkinson's disease, and chronic traumatic encephalopathy. Despite improved supportive and rehabilitative care of TBI patients, unfortunately, all late phase clinical trials in TBI have yet to yield a safe and effective neuroprotective treatment. The disappointing clinical trials may be attributed to variability in treatment approaches and heterogeneity of the population of TBI patients as well as a race against time to prevent or reduce inexorable cell death. TBI is not just an acute event but a chronic disease. Among many mechanisms involved in secondary injury after TBI, emerging preclinical studies indicate that posttraumatic prolonged and progressive neuroinflammation is associated with neurodegeneration which may be treatable long after the initiating brain injury. This review provides an overview of recent understanding of neuroinflammation in TBI and preclinical cell-based therapies that target neuroinflammation and promote functional recovery after TBI.
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Affiliation(s)
- Ye Xiong
- Department of Neurosurgery Henry Ford Health System, 2799 West Grand Boulevard, Detroit, MI, 48202, USA.
| | - Asim Mahmood
- Department of Neurosurgery Henry Ford Health System, 2799 West Grand Boulevard, Detroit, MI, 48202, USA
| | - Michael Chopp
- Department of Neurology, Henry Ford Health System, 2799 West Grand Boulevard, Detroit, MI, 48202, USA; Department of Physics, Oakland University, Rochester, MI, 48309, USA
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