1
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Dimanche A, Goldberg J, Miller DR, Bervini D, Raabe A, Dunn AK. Laser speckle contrast imaging versus microvascular Doppler sonography in aneurysm surgery: A prospective study. World Neurosurg X 2024; 23:100377. [PMID: 38698836 PMCID: PMC11063637 DOI: 10.1016/j.wnsx.2024.100377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Accepted: 04/02/2024] [Indexed: 05/05/2024] Open
Abstract
Objective This study aimed to compare microvascular Doppler sonography (MDS) and laser speckle contrast imaging (LSCI) for assessing vessel patency and aneurysm occlusion during microsurgical clipping of intracranial aneurysms. Methods MDS and LSCI were used after clip placement during six neurovascular procedures including six patients, and agreement between the two techniques was assessed. LSCI was performed in parallel or right after MDS evaluation. The Doppler response was assessed through listening while flow in the LSCI videos was evaluated by three blinded neurovascular surgeons after the surgery. Statistical analysis determined the agreement between the techniques in assessing flow in 18 regions of interest (ROIs). Results Agreement between MDS and LSCI in assessing vessel patency was observed in 87 % of the ROIs. LSCI accurately identified flow in 93.3 % of assessable ROIs, with no false positive or negative measurements. Three ROIs were not assessable with LSCI due to motion artifacts or poor image quality. No complications were observed. Conclusions LSCI demonstrated high agreement with MDS in assessing vessel patency during microsurgical clipping of intracranial aneurysms. It provided continuous, real-time, full-field imaging with high spatial resolution and temporal resolution. While MDS allowed evaluation of deep vascular regions, LSCI complemented it by offering unlimited assessment of surrounding vessels.
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Affiliation(s)
- Alexis Dimanche
- The University of Texas at Austin, Department of Biomedical Engineering, Austin, TX, United States
| | - Johannes Goldberg
- Department of Neurosurgery, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | | | - David Bervini
- Department of Neurosurgery, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Andreas Raabe
- Department of Neurosurgery, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Andrew K. Dunn
- The University of Texas at Austin, Department of Biomedical Engineering, Austin, TX, United States
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2
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Sdobnov A, Tsytsarev V, Piavchenko G, Bykov A, Meglinski I. Beyond life: Exploring hemodynamic patterns in postmortem mice brains. JOURNAL OF BIOPHOTONICS 2024; 17:e202400017. [PMID: 38714530 DOI: 10.1002/jbio.202400017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Revised: 03/14/2024] [Accepted: 04/09/2024] [Indexed: 05/10/2024]
Abstract
We utilize Laser Speckle Contrast Imaging (LSCI) for visualizing cerebral blood flow in mice during and post-cardiac arrest. Analyzing LSCI images, we noted temporal blood flow variations across the brain surface for hours postmortem. Fast Fourier Transform (FFT) analysis depicted blood flow and microcirculation decay post-death. Continuous Wavelet Transform (CWT) identified potential cerebral hemodynamic synchronization patterns. Additionally, non-negative matrix factorization (NMF) with four components segmented LSCI images, revealing structural subcomponent alterations over time. This integrated approach of LSCI, FFT, CWT, and NMF offers a comprehensive tool for studying cerebral blood flow dynamics, metaphorically capturing the 'end of the tunnel' experience. Results showed primary postmortem hemodynamic activity in the olfactory bulbs, followed by blood microflow relocations between somatosensory and visual cortical regions via the superior sagittal sinus. This method opens new avenues for exploring these phenomena, potentially linking neuroscientific insights with mysteries surrounding consciousness and perception at life's end.
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Affiliation(s)
- Anton Sdobnov
- Optoelectronics and Measurement Techniques, University of Oulu, Oulu, Finland
| | - Vassiliy Tsytsarev
- Department of Neurobiology, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Gennadi Piavchenko
- Department of Human Anatomy and Histology, Institute of Clinical Medicine N.V. Sklifosovsky, I.M. Sechenov First Moscow State Medical University, Moscow, Russia
| | - Alexander Bykov
- Optoelectronics and Measurement Techniques, University of Oulu, Oulu, Finland
| | - Igor Meglinski
- Department of Human Anatomy and Histology, Institute of Clinical Medicine N.V. Sklifosovsky, I.M. Sechenov First Moscow State Medical University, Moscow, Russia
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3
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Fritch C, Church E, Wilkinson DA. Advances in Intraoperative Imaging for Vascular Neurosurgery. Neuroimaging Clin N Am 2024; 34:261-270. [PMID: 38604710 DOI: 10.1016/j.nic.2024.01.005] [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] [Indexed: 04/13/2024]
Abstract
Cerebrovascular surgery has many intraoperative imaging modalities available. Modern technologies include intraoperative digital subtraction angiogram, indocyanine green (ICG) angiography, relative fluorescent measurement with ICG, and ultrasound. Each of these can be used effectively in the treatment of open aneurysm and arteriovenous malformation surgeries, in addition to arteriovenous fistula surgery, and cerebral bypass surgery.
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Affiliation(s)
- Chanju Fritch
- Department of Neurosurgery, Penn State Milton S. Hershey Medical Center, 500 University Drive, Hershey, PA 17033, USA
| | - Ephraim Church
- Department of Neurosurgery, Penn State Milton S. Hershey Medical Center, 500 University Drive, Hershey, PA 17033, USA
| | - David Andrew Wilkinson
- Department of Neurosurgery, Penn State Milton S. Hershey Medical Center, 500 University Drive, Hershey, PA 17033, USA.
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4
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Meglinski I, Dunn A, Durduran T, Postnov D, Zhu D. Dynamic Light Scattering in Biomedical Applications: feature issue introduction. BIOMEDICAL OPTICS EXPRESS 2024; 15:2890-2897. [PMID: 38855661 PMCID: PMC11161354 DOI: 10.1364/boe.525699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2024] [Indexed: 06/11/2024]
Abstract
The feature Issue on "Dynamic Light Scattering in Biomedical Applications" presents a compilation of research breakthroughs and technological advancements that have shaped the field of biophotonics, particularly in the non-invasive exploration of biological tissues. Highlighting the significance of dynamic light scattering (DLS) alongside techniques like laser Doppler flowmetry (LDF), diffusing wave spectroscopy (DWS), and laser speckle contrast imaging (LSCI), this issue underscores the versatile applications of these methods in capturing the intricate dynamics of microcirculatory blood flow across various tissues. Contributions explore developments in fluorescence tomography, the integration of machine learning for data processing, enhancements in microscopy for cancer detection, and novel approaches in optical biophysics, among others. Innovations featured include a high-resolution speckle contrast tomography system for deep blood flow imaging, a rapid estimation technique for real-time tissue perfusion imaging, and the use of convolutional neural networks for efficient blood flow mapping. Additionally, studies delve into the impact of skin strain on spectral reflectance, the sensitivity of cerebral blood flow measurement techniques, and the potential of photobiomodulation for enhancing brain function. This issue not only showcases the latest theoretical and experimental strides in DLS-based imaging but also anticipates the continued evolution of these modalities for groundbreaking applications in disease detection, diagnosis, and monitoring, marking a pivotal contribution to the field of biomedical optics.
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Affiliation(s)
- Igor Meglinski
- College of Engineering and Physical Science, Aston University, Birmingham, B4 7ET, United Kingdom
| | - Andrew Dunn
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, Texas 78712, USA
| | - Turgut Durduran
- ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, Castelldefels (Barcelona), Spain
| | - Dmitry Postnov
- Department of Clinical Medicine, Aarhus University, Universitetsbyen 3, 8000 Aarhus, Denmark
| | - Dan Zhu
- Britton Chance Center for Biomedical Photonics - MoE Key Laboratory for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics - Advanced Biomedical Imaging Facility, Huazhong University of Science and Technology, 430074 Wuhan, Hubei, China
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5
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Chen Y, Chen S, Wu M, Chen F, Guan Q, Zhang S, Wen J, Sun Z, Chen Z. Hydrogen Sulfide Protects against Rat Ischemic Brain Injury by Promoting RhoA Phosphorylation at Serine 188. ACS OMEGA 2024; 9:13227-13238. [PMID: 38524410 PMCID: PMC10956087 DOI: 10.1021/acsomega.3c10006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 02/21/2024] [Accepted: 02/29/2024] [Indexed: 03/26/2024]
Abstract
The protective role of hydrogen sulfide against cerebral ischemia-reperfusion injury involves the inhibition of the RhoA-/Rho-associated coiled-coil kinase (ROCK) pathway. However, the specific mechanism remains elusive. This study investigates the impact of hydrogen sulfide on RhoA phosphorylation at serine 188 (Ser188) in vivo, aiming to test the hypothesis that hydrogen sulfide exerts neuroprotection by enhancing RhoA phosphorylation at Ser188, subsequently inhibiting the RhoA/ROCK pathway. Recombinant RhoAwild-pEGFP-N1 and RhoAS188A-pEGFP-N1 plasmids were constructed and administered via stereotaxic injection into the rat hippocampus. A rat global cerebral ischemia-reperfusion model was induced by bilateral carotid artery ligation to elucidate the neuroprotective mechanisms of hydrogen sulfide. Both RhoAwild-pEGFP-N1 and RhoAS188A-pEGFP-N1 plasmids expressed RhoAwild and RhoAS188A proteins, respectively, in rat hippocampal tissues, alongside the intrinsic RhoA protein. Systemic administration of the exogenous hydrogen sulfide donor sodium hydrosulfide led to an increase in Ser188 phosphorylation of transfected RhoAwild and intrinsic RhoA protein within the hippocampus. However, this effect was not observed in tissues transfected with RhoAS188A. Sodium hydrosulfide-mediated RhoA phosphorylation correlated with decreased RhoA and ROCK2 activity in rat hippocampal tissues. Furthermore, sodium hydrosulfide administration reduced cerebral ischemia-reperfusion-induced neuronal damage and apoptosis in rat hippocampal tissues transfected with RhoAwild. However, this neuroprotective effect was attenuated in rats transfected with RhoAS188A. These findings suggest that the neuroprotective mechanism of hydrogen sulfide against cerebral ischemia/reperfusion injury involves increased RhoA phosphorylation at Ser188. Promoting this phosphorylation may represent a potential intrinsic therapeutic target for ischemic stroke.
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Affiliation(s)
- Ye Chen
- Department
of Pathology, The First Affiliated Hospital
of Anhui Medical University, Hefei 230000, Anhui, China
| | - Shuo Chen
- Department
of Pharmacology, School of Basic Medical Sciences, Anhui Medical University, Hefei 230000, China
| | - Miao Wu
- Department
of Pharmacology, School of Basic Medical Sciences, Anhui Medical University, Hefei 230000, China
| | - Fang Chen
- Department
of Neurology, The First Affiliated
Hospital of Anhui Medical University, Hefei 230000, Anhui, China
| | - Qianjun Guan
- Department
of Pharmacology, School of Basic Medical Sciences, Anhui Medical University, Hefei 230000, China
| | - Sen Zhang
- Department
of Pharmacology, School of Basic Medical Sciences, Anhui Medical University, Hefei 230000, China
| | - Jiyue Wen
- Department
of Pharmacology, School of Basic Medical Sciences, Anhui Medical University, Hefei 230000, China
| | - Zhongwu Sun
- Department
of Neurology, The First Affiliated
Hospital of Anhui Medical University, Hefei 230000, Anhui, China
| | - Zhiwu Chen
- Department
of Pharmacology, School of Basic Medical Sciences, Anhui Medical University, Hefei 230000, China
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6
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Yun JH. A Brief Introduction to the Study of Cerebral Blood Flow Measurement in Traumatic Brain Injury Using Optical Imaging Approach. Korean J Neurotrauma 2024; 20:5-7. [PMID: 38576498 PMCID: PMC10990700 DOI: 10.13004/kjnt.2024.20.e14] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2024] [Revised: 03/18/2024] [Accepted: 03/18/2024] [Indexed: 04/06/2024] Open
Affiliation(s)
- Jung-Ho Yun
- Department of Neurological Surgery, Dankook University College of Medicine, Cheonan, Korea
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7
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Mikkelsen SH, Skøtt MV, Gutierrez E, Postnov DD. Laser speckle imaging of the hippocampus. BIOMEDICAL OPTICS EXPRESS 2024; 15:1268-1277. [PMID: 38404300 PMCID: PMC10890870 DOI: 10.1364/boe.507371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 12/15/2023] [Accepted: 12/20/2023] [Indexed: 02/27/2024]
Abstract
Research on hippocampal blood flow is essential for gaining insight into its involvement in learning and memory and its role in age-related cognitive impairment and dementia. In this study, we applied laser speckle contrast imaging (LSCI) and dynamic light scattering imaging (DLSI) to monitor perfusion in mouse hippocampus via a chronic, optically transparent window. LSCI scans showed hippocampal blood vessels appear more out of focus than similar caliber vessels in the mouse cortex. We hypothesize that it is caused by the inverse vascular topology and increased contribution of multiply-scattered photons detected from the upper layers of the hippocampus. We support the hypothesis with DLSI, showing a 1300% increased contribution of multiple-scattering unordered dynamics regime in large hippocampal vessels.
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Affiliation(s)
- Signe H. Mikkelsen
- Center of Functionally Integrative Neuroscience, Aarhus University, Aarhus, Denmark
| | - Mia V. Skøtt
- Center of Functionally Integrative Neuroscience, Aarhus University, Aarhus, Denmark
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8
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Konovalov A, Grebenev F, Stavtsev D, Kozlov I, Gadjiagaev V, Piavchenko G, Telyshev D, Gerasimenko AY, Meglinski I, Zalogin S, Artemyev A, Golodnev G, Shumeiko T, Eliava S. Real-time laser speckle contrast imaging for intraoperative neurovascular blood flow assessment: animal experimental study. Sci Rep 2024; 14:1735. [PMID: 38242903 PMCID: PMC10799050 DOI: 10.1038/s41598-023-51022-2] [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: 06/21/2023] [Accepted: 12/29/2023] [Indexed: 01/21/2024] Open
Abstract
The use of various blood flow control methods in neurovascular interventions is crucial for reducing postoperative complications. Neurosurgeons worldwide use different methods, such as contact Dopplerography, intraoperative indocyanine videoangiography (ICG) video angiography, fluorescein angiography, flowmetry, intraoperative angiography, and direct angiography. However, there is no noninvasive method that can assess the presence of blood flow in the vessels of the brain without the introduction of fluorescent substances throughout the intervention. The real-time laser-speckle contrast imaging (LSCI) method was studied for its effectiveness in controlling blood flow in standard cerebrovascular surgery cases in rat common carotid arteries, such as proximal occlusion, trapping, reperfusion, anastomosis, and intraoperative vessel thrombosis. The real-time LSCI method is a promising method for use in neurosurgical practice. This approach allows timely diagnosis of intraoperative disturbance of blood flow in vessels in cases of clip occlusion or thrombosis. Additionally, LSCI allows us to reliably confirm the functioning of the anastomosis and reperfusion after removal of the clips and thrombolysis in real time. An unresolved limitation of the method is noise from movements, but this does not reduce the value of the method. Additional research is required to improve the quality of the data obtained.
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Affiliation(s)
- Anton Konovalov
- Burdenko Neurosurgшcal Center, Moscow, Russian Federation.
- Institute for Bionic Technologies and Engineering, I.M. Sechenov First Moscow State Medical University, Moscow, 119991, Russian Federation.
| | - Fyodor Grebenev
- Burdenko Neurosurgшcal Center, Moscow, Russian Federation
- Institute for Bionic Technologies and Engineering, I.M. Sechenov First Moscow State Medical University, Moscow, 119991, Russian Federation
| | - Dmitry Stavtsev
- Institute for Bionic Technologies and Engineering, I.M. Sechenov First Moscow State Medical University, Moscow, 119991, Russian Federation
- Institute of Biomedical Systems, National Research University of Electronic Technology, Zelenograd, Moscow, 124498, Russian Federation
| | - Igor Kozlov
- Institute for Bionic Technologies and Engineering, I.M. Sechenov First Moscow State Medical University, Moscow, 119991, Russian Federation
| | | | - Gennadii Piavchenko
- Department of Human Anatomy and Histology, I.M. Sechenov First Moscow State Medical University, Moscow, Russian Federation
| | - Dmitry Telyshev
- Institute for Bionic Technologies and Engineering, I.M. Sechenov First Moscow State Medical University, Moscow, 119991, Russian Federation
- Institute of Biomedical Systems, National Research University of Electronic Technology, Zelenograd, Moscow, 124498, Russian Federation
| | - Alexander Yu Gerasimenko
- Institute for Bionic Technologies and Engineering, I.M. Sechenov First Moscow State Medical University, Moscow, 119991, Russian Federation
- Institute of Biomedical Systems, National Research University of Electronic Technology, Zelenograd, Moscow, 124498, Russian Federation
| | - Igor Meglinski
- Department of Human Anatomy and Histology, I.M. Sechenov First Moscow State Medical University, Moscow, Russian Federation.
- College of Engineering and Physical Sciences, Aston University, Birmingham, UK.
| | - Savely Zalogin
- Department of Operative Surgery and Topographic Anatomy, I.M, Sechenov First Moscow State Medical University, Moscow, Russia
| | - Anton Artemyev
- Department of Operative Surgery and Topographic Anatomy, I.M, Sechenov First Moscow State Medical University, Moscow, Russia
| | - Grigorii Golodnev
- Department of Operative Surgery and Topographic Anatomy, I.M, Sechenov First Moscow State Medical University, Moscow, Russia
| | - Tatiana Shumeiko
- Department of Operative Surgery and Topographic Anatomy, I.M, Sechenov First Moscow State Medical University, Moscow, Russia
| | - Shalva Eliava
- Burdenko Neurosurgшcal Center, Moscow, Russian Federation
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9
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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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10
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Venediktov AA, Bushueva OY, Kudryavtseva VA, Kuzmin EA, Moiseeva AV, Baldycheva A, Meglinski I, Piavchenko GA. Closest horizons of Hsp70 engagement to manage neurodegeneration. Front Mol Neurosci 2023; 16:1230436. [PMID: 37795273 PMCID: PMC10546621 DOI: 10.3389/fnmol.2023.1230436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2023] [Accepted: 08/18/2023] [Indexed: 10/06/2023] Open
Abstract
Our review seeks to elucidate the current state-of-the-art in studies of 70-kilodalton-weighed heat shock proteins (Hsp70) in neurodegenerative diseases (NDs). The family has already been shown to play a crucial role in pathological aggregation for a wide spectrum of brain pathologies. However, a slender boundary between a big body of fundamental data and its implementation has only recently been crossed. Currently, we are witnessing an anticipated advancement in the domain with dozens of studies published every month. In this review, we briefly summarize scattered results regarding the role of Hsp70 in the most common NDs including Alzheimer's disease (AD), Parkinson's disease (PD), and amyotrophic lateral sclerosis (ALS). We also bridge translational studies and clinical trials to portray the output for medical practice. Available options to regulate Hsp70 activity in NDs are outlined, too.
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Affiliation(s)
- Artem A. Venediktov
- Department of Human Anatomy and Histology, I.M. Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia
| | - Olga Yu Bushueva
- Laboratory of Genomic Research, Research Institute for Genetic and Molecular Epidemiology, Kursk State Medical University, Kursk, Russia
| | - Varvara A. Kudryavtseva
- Department of Human Anatomy and Histology, I.M. Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia
| | - Egor A. Kuzmin
- Department of Human Anatomy and Histology, I.M. Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia
| | - Aleksandra V. Moiseeva
- Department of Human Anatomy and Histology, I.M. Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia
| | - Anna Baldycheva
- STEMM Laboratory, University of Exeter, Exeter, United Kingdom
| | - Igor Meglinski
- Department of Physics, University of Oulu, Oulu, Finland
- College of Engineering and Physical Sciences, Aston University, Birmingham, United Kingdom
| | - Gennadii A. Piavchenko
- Department of Human Anatomy and Histology, I.M. Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia
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11
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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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Wang Y, Tsytsarev V, Liao LD. In vivo laser speckle contrast imaging of 4-aminopyridine- or pentylenetetrazole-induced seizures. APL Bioeng 2023; 7:036119. [PMID: 37781728 PMCID: PMC10541235 DOI: 10.1063/5.0158791] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Accepted: 08/28/2023] [Indexed: 10/03/2023] Open
Abstract
Clinical and preclinical studies on epileptic seizures are closely linked to the study of neurovascular coupling. Obtaining reliable information about cerebral blood flow (CBF) in the area of epileptic activity through minimally invasive techniques is crucial for research in this field. In our studies, we used laser speckle contrast imaging (LSCI) to gather information about the local blood circulation in the area of epileptic activity. We used two models of epileptic seizures: one based on 4-aminopyridine (4-AP) and another based on pentylenetetrazole (PTZ). We verified the duration of an epileptic seizure using electrocorticography (ECoG). We applied the antiepileptic drug topiramate (TPM) to both models, but its effect was different in each case. However, in both models, TPM had an effect on neurovascular coupling in the area of epileptic activity, as shown by both LSCI and ECoG data. We demonstrated that TPM significantly reduced the amplitude of 4-AP-induced epileptic seizures (4-AP+TPM: 0.61 ± 0.13 mV vs 4-AP: 1.08 ± 0.19 mV; p < 0.05), and it also reduced gamma power in ECoG in PTZ-induced epileptic seizures (PTZ+TPM: 38.5% ± 11.9% of the peak value vs PTZ: 59.2% ± 3.0% of peak value; p < 0.05). We also captured the pattern of CBF changes during focal epileptic seizures induced by 4-AP. Our data confirm that the system of simultaneous cortical LSCI and registration of ECoG makes it possible to evaluate the effectiveness of pharmacological agents in various types of epileptic seizures in in vivo models and provides spatial and temporal information on the process of ictogenesis.
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Affiliation(s)
| | - Vassiliy Tsytsarev
- Department of Anatomy and Neurobiology, University of Maryland School of Medicine, 20 Penn Street, HSF-2, Baltimore, Maryland 21201, USA
| | - Lun-De Liao
- Institute of Biomedical Engineering and Nanomedicine, National Health Research Institutes, No. 35, Keyan Rd., Zhunan Township, Miaoli County 350, Taiwan
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Sokolowski JD, Soldozy S, Sharifi KA, Norat P, Kearns KN, Liu L, Williams AM, Yağmurlu K, Mastorakos P, Miller GW, Kalani MYS, Park MS, Kellogg RT, Tvrdik P. Preclinical models of middle cerebral artery occlusion: new imaging approaches to a classic technique. Front Neurol 2023; 14:1170675. [PMID: 37409019 PMCID: PMC10318149 DOI: 10.3389/fneur.2023.1170675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Accepted: 05/30/2023] [Indexed: 07/07/2023] Open
Abstract
Stroke remains a major burden on patients, families, and healthcare professionals, despite major advances in prevention, acute treatment, and rehabilitation. Preclinical basic research can help to better define mechanisms contributing to stroke pathology, and identify therapeutic interventions that can decrease ischemic injury and improve outcomes. Animal models play an essential role in this process, and mouse models are particularly well-suited due to their genetic accessibility and relatively low cost. Here, we review the focal cerebral ischemia models with an emphasis on the middle cerebral artery occlusion technique, a "gold standard" in surgical ischemic stroke models. Also, we highlight several histologic, genetic, and in vivo imaging approaches, including mouse stroke MRI techniques, that have the potential to enhance the rigor of preclinical stroke evaluation. Together, these efforts will pave the way for clinical interventions that can mitigate the negative impact of this devastating disease.
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Affiliation(s)
- Jennifer D. Sokolowski
- Department of Neurological Surgery, University of Virginia, Charlottesville, VA, United States
| | - Sauson Soldozy
- Department of Neurological Surgery, Westchester Medical Center, Valhalla, NY, United States
| | - Khadijeh A. Sharifi
- Department of Neurological Surgery, University of Virginia, Charlottesville, VA, United States
- Department of Neuroscience, University of Virginia, Charlottesville, VA, United States
| | - Pedro Norat
- Department of Neurological Surgery, University of Virginia, Charlottesville, VA, United States
| | - Kathryn N. Kearns
- Department of Neurological Surgery, University of Virginia, Charlottesville, VA, United States
| | - Lei Liu
- Department of Neurological Surgery and Neuroscience, Northwestern University, Chicago, IL, United States
| | - Ashley M. Williams
- School of Medicine, Morsani College of Medicine, Tampa, FL, United States
| | - Kaan Yağmurlu
- Department of Neurological Surgery, University of Tennessee, Memphis, TN, United States
| | - Panagiotis Mastorakos
- Department of Neurological Surgery, Thomas Jefferson University, Philadelphia, PA, United States
| | - G. Wilson Miller
- Department of Radiology and Medical Imaging, University of Virginia, Charlottesville, VA, United States
| | - M. Yashar S. Kalani
- Department of Neurological Surgery, St. John's Neuroscience Institute, Tulsa, OK, United States
| | - Min S. Park
- Department of Neurological Surgery, University of Virginia, Charlottesville, VA, United States
| | - Ryan T. Kellogg
- Department of Neurological Surgery, University of Virginia, Charlottesville, VA, United States
| | - Petr Tvrdik
- Department of Neurological Surgery, University of Virginia, Charlottesville, VA, United States
- Department of Neuroscience, University of Virginia, Charlottesville, VA, United States
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