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Castillo VCG, Akbar L, Siwadamrongpong R, Ohta Y, Kawahara M, Sunaga Y, Takehara H, Tashiro H, Sasagawa K, Ohta J. Region of interest determination algorithm of lensless calcium imaging datasets. PLoS One 2024; 19:e0308573. [PMID: 39288120 PMCID: PMC11407621 DOI: 10.1371/journal.pone.0308573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2024] [Accepted: 07/26/2024] [Indexed: 09/19/2024] Open
Abstract
Advances in fluorescence imaging technology have been crucial to the progress of neuroscience. Whether it was specific expression of indicator proteins, detection of neurotransmitters, or miniaturization of fluorescence microscopes, fluorescence imaging has improved upon electrophysiology, the gold standard for monitoring brain activity, and enabled novel methods to sense activity in the brain. Hence, we developed a lightweight and compact implantable CMOS-based lensless Ca2+ imaging device for freely moving transgenic G-CaMP mouse experiments. However, without a lens system, determination of regions of interest (ROI) has proven challenging. Localization of fluorescence activity and separation of signal from noise are difficult. In this study, we report an ROI selection method using a series of adaptive binarizations with a gaussian method and morphological image processing. The parameters for each operation such as the kernel size, sigma and footprint size were optimized. We then validated the utility of the algorithm with simulated data and freely moving nociception experiments using the lensless devices. The device was implanted in the dorsal raphe nucleus to observe pain-related brain activity following a formalin test to stimulate pain. We observed significant increases in fluorescence activity after formalin injection compared to the control group when using the ROI determination algorithm.
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Affiliation(s)
| | - Latiful Akbar
- Graduate School of Science and Technology, Nara Institute of Science and Technology, Ikoma, Japan
| | | | - Yasumi Ohta
- Graduate School of Science and Technology, Nara Institute of Science and Technology, Ikoma, Japan
| | - Mamiko Kawahara
- Graduate School of Science and Technology, Nara Institute of Science and Technology, Ikoma, Japan
| | - Yoshinori Sunaga
- Graduate School of Science and Technology, Nara Institute of Science and Technology, Ikoma, Japan
| | - Hironari Takehara
- Graduate School of Science and Technology, Nara Institute of Science and Technology, Ikoma, Japan
| | - Hiroyuki Tashiro
- Graduate School of Science and Technology, Nara Institute of Science and Technology, Ikoma, Japan
- Department of Health Sciences, Faculty of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Kiyotaka Sasagawa
- Graduate School of Science and Technology, Nara Institute of Science and Technology, Ikoma, Japan
| | - Jun Ohta
- Graduate School of Science and Technology, Nara Institute of Science and Technology, Ikoma, Japan
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Olorocisimo JP, Ohta Y, Regonia PR, Castillo VCG, Yoshimoto J, Takehara H, Sasagawa K, Ohta J. Brain-implantable needle-type CMOS imaging device enables multi-layer dissection of seizure calcium dynamics in the hippocampus. J Neural Eng 2024; 21:046022. [PMID: 38925109 DOI: 10.1088/1741-2552/ad5c03] [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: 01/15/2024] [Accepted: 06/26/2024] [Indexed: 06/28/2024]
Abstract
Objective: Current neuronal imaging methods mostly use bulky lenses that either impede animal behavior or prohibit multi-depth imaging. To overcome these limitations, we developed a lightweight lensless biophotonic system for neuronal imaging, enabling compact and simultaneous visualization of multiple brain layers.Approach: Our developed 'CIS-NAIST' device integrates a micro-CMOS image sensor, thin-film fluorescence filter, micro-LEDs, and a needle-shaped flexible printed circuit. With this device, we monitored neuronal calcium dynamics during seizures across the different layers of the hippocampus and employed machine learning techniques for seizure classification and prediction.Main results: The CIS-NAIST device revealed distinct calcium activity patterns across the CA1, molecular interlayer, and dentate gyrus. Our findings indicated an elevated calcium amplitude activity specifically in the dentate gyrus compared to other layers. Then, leveraging the multi-layer data obtained from the device, we successfully classified seizure calcium activity and predicted seizure behavior using Long Short-Term Memory and Hidden Markov models.Significance: Taken together, our 'CIS-NAIST' device offers an effective and minimally invasive method of seizure monitoring that can help elucidate the mechanisms of temporal lobe epilepsy.
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Affiliation(s)
| | - Yasumi Ohta
- Division of Materials Science, Nara Institute of Science and Technology, Ikoma, Japan
| | - Paul R Regonia
- Department of Computer Science, University of the Philippines Diliman, Manila, The Philippines
| | - Virgil C G Castillo
- Division of Materials Science, Nara Institute of Science and Technology, Ikoma, Japan
| | - Junichiro Yoshimoto
- Department of Biomedical Data Science, Fujita Health University School of Medicine, Toyoake, Japan
| | - Hironari Takehara
- Division of Materials Science, Nara Institute of Science and Technology, Ikoma, Japan
| | - Kiyotaka Sasagawa
- Division of Materials Science, Nara Institute of Science and Technology, Ikoma, Japan
| | - Jun Ohta
- Division of Materials Science, Nara Institute of Science and Technology, Ikoma, Japan
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3
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Inami C, Haruta M, Ohta Y, Tanaka M, So M, Sobue K, Akay Y, Kume K, Ohta J, Akay M, Ohsawa M. Real-time monitoring of cortical brain activity in response to acute pain using wide-area Ca 2+ imaging. Biochem Biophys Res Commun 2024; 708:149800. [PMID: 38522402 DOI: 10.1016/j.bbrc.2024.149800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2024] [Accepted: 03/16/2024] [Indexed: 03/26/2024]
Abstract
Previous human and rodent studies indicated that nociceptive stimuli activate many brain regions that is involved in the somatosensory and emotional sensation. Although these studies have identified several important brain regions involved in pain perception, it has been a challenge to observe neural activity directly and simultaneously in these multiple brain regions during pain perception. Using a transgenic mouse expressing G-CaMP7 in majority of astrocytes and a subpopulation of excitatory neurons, we recorded the brain activity in the mouse cerebral cortex during acute pain stimulation. Both of hind paw pinch and intraplantar administration of formalin caused strong transient increase of the fluorescence in several cortical regions, including primary somatosensory, motor and retrosplenial cortex. This increase of the fluorescence intensity was attenuated by the pretreatment with morphine. The present study provides important insight into the cortico-cortical network during pain perception.
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Affiliation(s)
- Chihiro Inami
- Department of Neuropharmacology, Graduate School of Pharmaceutical Sciences, Nagoya City University, 3-1 Tanabe-dori, Mizuho-ku, Nagoya, 467-8603, Japan
| | - Makito Haruta
- Division of Materials Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, 8916-5, Takayama, Ikoma-shi, Nara, Japan
| | - Yasumi Ohta
- Division of Materials Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, 8916-5, Takayama, Ikoma-shi, Nara, Japan
| | - Motoshi Tanaka
- Department of Anesthesiology and Intensive Care Medicine, Graduate School of Medicine. Nagoya City University, 1 Kawasumi, Mizuho-ku, Nagoya, 467-8601, Japan
| | - MinHye So
- Department of Anesthesiology and Intensive Care Medicine, Graduate School of Medicine. Nagoya City University, 1 Kawasumi, Mizuho-ku, Nagoya, 467-8601, Japan
| | - Kazuya Sobue
- Department of Anesthesiology and Intensive Care Medicine, Graduate School of Medicine. Nagoya City University, 1 Kawasumi, Mizuho-ku, Nagoya, 467-8601, Japan
| | - Yasemin Akay
- Biomedical Engineering Department, University of Houston, 3517 Cullen Blvd, Houston, TX, 77204, USA
| | - Kazuhiko Kume
- Department of Neuropharmacology, Graduate School of Pharmaceutical Sciences, Nagoya City University, 3-1 Tanabe-dori, Mizuho-ku, Nagoya, 467-8603, Japan
| | - Jun Ohta
- Division of Materials Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, 8916-5, Takayama, Ikoma-shi, Nara, Japan
| | - Metin Akay
- Biomedical Engineering Department, University of Houston, 3517 Cullen Blvd, Houston, TX, 77204, USA
| | - Masahiro Ohsawa
- Department of Neuropharmacology, Graduate School of Pharmaceutical Sciences, Nagoya City University, 3-1 Tanabe-dori, Mizuho-ku, Nagoya, 467-8603, Japan; Department of Integrative Neuroscience, National Center for Geriatrics and Gerontology, Obu, Aichi, 474-8511, Japan; Laboratory of Systems Pharmacology, Faculty of Pharma-Sciences, Teikyo University, Itabashi, Tokyo, 173-8603, Japan.
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4
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Roschelle M, Rabbani R, Papageorgiou E, Zhang H, Cooperberg M, Stohr BA, Niknejad A, Anwar M. Multicolor fluorescence microscopy for surgical guidance using a chip-scale imager with a low-NA fiber optic plate and a multi-bandpass interference filter. BIOMEDICAL OPTICS EXPRESS 2024; 15:1761-1776. [PMID: 38495694 PMCID: PMC10942699 DOI: 10.1364/boe.509235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Revised: 01/27/2024] [Accepted: 02/01/2024] [Indexed: 03/19/2024]
Abstract
In curative-intent cancer surgery, intraoperative fluorescence imaging of both diseased and healthy tissue can help to ensure the successful removal of all gross and microscopic diseases with minimal damage to neighboring critical structures, such as nerves. Current fluorescence-guided surgery (FGS) systems, however, rely on bulky and rigid optics that incur performance-limiting trade-offs between sensitivity and maneuverability. Moreover, many FGS systems are incapable of multiplexed imaging. As a result, clinical FGS is currently limited to millimeter-scale detection of a single fluorescent target. Here, we present a scalable, lens-less fluorescence imaging chip, VISION, capable of sensitive and multiplexed detection within a compact form factor. Central to VISION is a novel optical frontend design combining a low-numerical-aperture fiber optic plate (LNA-FOP) and a multi-bandpass interference filter, which is affixed to a custom CMOS image sensor. The LNA-FOP acts as a planar collimator to improve resolution and compensate for the angle-sensitivity of the interference filter, enabling high-resolution and multiplexed fluorescence imaging without lenses. We show VISION is capable of detecting tumor foci of less than 100 cells at near video framerates and, as proof of principle, can simultaneously visualize both tumors and nerves in ex vivo prostate tissue.
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Affiliation(s)
- Micah Roschelle
- Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, California 94720, USA
| | - Rozhan Rabbani
- Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, California 94720, USA
| | - Efthymios Papageorgiou
- Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, California 94720, USA
| | - Hui Zhang
- Department of Radiation Oncology, University of California, San Francisco, California 94158, USA
| | - Matthew Cooperberg
- Department of Urology, University of California, San Francisco, California 94158, USA
| | - Bradley A Stohr
- Department of Pathology, University of California, San Francisco, California 94158, USA
| | - Ali Niknejad
- Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, California 94720, USA
| | - Mekhail Anwar
- Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, California 94720, USA
- Department of Radiation Oncology, University of California, San Francisco, California 94158, USA
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Roschelle M, Rabbani R, Papageorgiou E, Zhang H, Cooperberg M, Stohr BA, Niknejad A, Anwar M. Multicolor fluorescence microscopy for surgical guidance using a chip-scale imager with a low-NA fiber optic plate and a multi-bandpass interference filter. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2023.10.16.562247. [PMID: 37904924 PMCID: PMC10614810 DOI: 10.1101/2023.10.16.562247] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/01/2023]
Abstract
In curative-intent cancer surgery, intraoperative fluorescence imaging of both diseased and healthy tissue can help to ensure successful removal of all gross and microscopic disease with minimal damage to neighboring critical structures, such as nerves. Current fluorescence-guided surgery (FGS) systems, however, rely on bulky and rigid optics that incur performance-limiting trade-offs between sensitivity and maneuverability. Moreover, many FGS systems are incapable of multiplexed imaging. As a result, clinical FGS is currently limited to millimeter-scale detection of a single fluorescent target. Here we present a scalable, lens-less fluorescence imaging chip, VISION, capable of sensitive and multiplexed detection within a compact form factor. Central to VISION is a novel optical frontend design combining a low-numerical-aperture fiber optic plate (LNA-FOP) and a multi-bandpass interference filter, which is affixed to a custom CMOS image sensor. The LNA-FOP acts as a planar collimator to improve resolution and compensate for the angle-sensitivity of the interference filter, enabling high-resolution and multiplexed fluorescence imaging without lenses. We show VISION is capable of detecting tumor foci of less than 100 cells at near video framerates and, as proof of principle, can simultaneously visualize both tumor and nerves in ex vivo prostate tissue.
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Akbar L, Castillo VCG, Olorocisimo JP, Ohta Y, Kawahara M, Takehara H, Haruta M, Tashiro H, Sasagawa K, Ohsawa M, Akay YM, Akay M, Ohta J. Multi-Region Microdialysis Imaging Platform Revealed Dorsal Raphe Nucleus Calcium Signaling and Serotonin Dynamics during Nociceptive Pain. Int J Mol Sci 2023; 24:ijms24076654. [PMID: 37047627 PMCID: PMC10094999 DOI: 10.3390/ijms24076654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 03/20/2023] [Accepted: 03/22/2023] [Indexed: 04/05/2023] Open
Abstract
In this research, we combined our ultralight micro-imaging device for calcium imaging with microdialysis to simultaneously visualize neural activity in the dorsal raphe nucleus (DRN) and measure serotonin release in the central nucleus of the amygdala (CeA) and the anterior cingulate cortex (ACC). Using this platform, we observed brain activity following nociception induced by formalin injection in the mouse’s hind paw. Our device showed that DRN fluorescence intensity increased after formalin injection, and the increase was highly correlated with the elevation in serotonin release in both the CeA and ACC. The increase in calcium fluorescence intensity occurred during the acute and inflammatory phases, which suggests the biphasic response of nociceptive pain. Furthermore, we found that the increase in fluorescence intensity was positively correlated with mouse licking behavior. Lastly, we compared the laterality of pain stimulation and found that DRN fluorescence activity was higher for contralateral stimulation. Microdialysis showed that CeA serotonin concentration increased only after contralateral stimulation, while ACC serotonin release responded bilaterally. In conclusion, our study not only revealed the inter-regional serotonergic connection among the DRN, the CeA, and the ACC, but also demonstrated that our device is feasible for multi-site implantation in conjunction with a microdialysis system, allowing the simultaneous multi-modal observation of different regions in the brain.
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Affiliation(s)
- Latiful Akbar
- Division of Materials Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, Ikoma 630-0101, Japan
| | - Virgil Christian Garcia Castillo
- Division of Materials Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, Ikoma 630-0101, Japan
| | - Joshua Philippe Olorocisimo
- Division of Materials Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, Ikoma 630-0101, Japan
| | - Yasumi Ohta
- Division of Materials Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, Ikoma 630-0101, Japan
| | - Mamiko Kawahara
- Division of Materials Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, Ikoma 630-0101, Japan
| | - Hironari Takehara
- Division of Materials Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, Ikoma 630-0101, Japan
| | - Makito Haruta
- Division of Materials Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, Ikoma 630-0101, Japan
| | - Hiroyuki Tashiro
- Division of Materials Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, Ikoma 630-0101, Japan
- Department of Health Sciences, Faculty of Medical Sciences, Kyushu University, Fukuoka 819-0395, Japan
| | - Kiyotaka Sasagawa
- Division of Materials Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, Ikoma 630-0101, Japan
| | - Masahiro Ohsawa
- Department of Neuropharmacology, Faculty of Pharmaceutical Sciences, Nagoya City University, Nagoya 467-8601, Japan
| | - Yasemin M. Akay
- Biomedical Engineering Department, University of Houston, 3517 Cullen Blvd, Houston, TX 77204, USA
| | - Metin Akay
- Biomedical Engineering Department, University of Houston, 3517 Cullen Blvd, Houston, TX 77204, USA
| | - Jun Ohta
- Division of Materials Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, Ikoma 630-0101, Japan
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Rustami E, Sasagawa K, Sugie K, Ohta Y, Takehara H, Haruta M, Tashiro H, Ohta J. Thin and Scalable Hybrid Emission Filter via Plasma Etching for Low-Invasive Fluorescence Detection. SENSORS (BASEL, SWITZERLAND) 2023; 23:3695. [PMID: 37050755 PMCID: PMC10098729 DOI: 10.3390/s23073695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Revised: 03/24/2023] [Accepted: 03/28/2023] [Indexed: 06/19/2023]
Abstract
Hybrid emission filters, comprising an interference filter and an absorption filter, exhibit high excitation light rejection performance and can act as lensless fluorescent devices. However, it has been challenging to produce them in large batches over a large area. In this study, we propose and demonstrate a method for transferring a Si substrate, on which the hybrid filter is deposited, onto an image sensor by attaching it to the sensor and removing the substrate via plasma etching. Through this method, we can transfer uniform filters onto fine micrometer-sized needle devices and millimeter-sized multisensor chips. Optical evaluation reveals that the hybrid filter emits light in the 500 to 560 nm range, close to the emission region of green fluorescent protein (GFP). Furthermore, by observing the fluorescence emission from the microbeads, a spatial resolution of 12.11 μm is calculated. In vitro experiments confirm that the fabricated device is able to discriminate GFP emission patterns from brain slices.
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Affiliation(s)
- Erus Rustami
- Division of Materials Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma 630-0192, Japan
- Department of Physics, Faculty of Mathematics and Natural Sciences, IPB University (Bogor), Kampus IPB Dramaga, Bogor 16680, West Java, Indonesia
| | - Kiyotaka Sasagawa
- Division of Materials Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma 630-0192, Japan
| | - Kenji Sugie
- Division of Materials Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma 630-0192, Japan
| | - Yasumi Ohta
- Division of Materials Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma 630-0192, Japan
| | - Hironari Takehara
- Division of Materials Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma 630-0192, Japan
| | - Makito Haruta
- Division of Materials Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma 630-0192, Japan
| | - Hiroyuki Tashiro
- Division of Materials Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma 630-0192, Japan
- Department of Health Sciences, Faculty of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Jun Ohta
- Division of Materials Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma 630-0192, Japan
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Tajerian M, Amrami M, Betancourt JM. Is there hemispheric specialization in the chronic pain brain? Exp Neurol 2022; 355:114137. [PMID: 35671801 PMCID: PMC10723052 DOI: 10.1016/j.expneurol.2022.114137] [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: 02/01/2022] [Revised: 05/31/2022] [Accepted: 06/01/2022] [Indexed: 11/25/2022]
Abstract
Organismal bilateral symmetry is associated with near-identical halves of the central nervous system, with certain functions displaying specialization through one brain hemisphere. The processing of pain in the brain as well as brain plasticity in the context of painful injuries have garnered much attention in recent decades. Noninvasive brain imaging studies in pain-free human subjects have identified multiple brain regions that are linked to the sensory and affective components of pain. Longlasting adaptations in brains of chronic pain sufferers have likewise been described, suggesting a mechanism for pain chronification. Invasive molecular and biochemical studies in animal models have expanded on these findings, with added emphasis on the role of specific genes and molecules involved. To date, the extent of hemispheric asymmetry in the context of pain is not well-understood. This topical review evaluates the evidence of hemispheric specialization observed in humans and rodent models of pain and compares it to findings where such asymmetry is absent. Our review shows conflicting information regarding the existence of pain-related asymmetry, and if so, the side to which it can be localized. This could be due to the heterogeneity of pain processing pathways, heterogeneity in study parameters, as well as differences in data reporting. With the advent of progressively sophisticated non-invasive tools that can be used in human subjects, in addition to more precise methods to visualize and control specific brain regions or neuronal ensembles in animal models, we predict that the next few decades will witness a better understanding of the supraspinal control and processing of chronic pain, including the role of each of its hemispheres.
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Affiliation(s)
- Maral Tajerian
- Department of Biology, Queens College, City University of New York, Queens, NY 11367, USA; The Graduate Center, City University of New York, New York, NY 10016, USA.
| | - Michael Amrami
- Department of Biology, Queens College, City University of New York, Queens, NY 11367, USA
| | - John Michael Betancourt
- Neuroscience Graduate Program, Graduate School of Medical Sciences, Weill Cornell Medicine, New York, NY 10021, USA
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Ohta Y, Murakami TE, Kawahara M, Haruta M, Takehara H, Tashiro H, Sasagawa K, Ohta J, Akay M, Akay YM. Investigating the Influence of GABA Neurons on Dopamine Neurons in the Ventral Tegmental Area Using Optogenetic Techniques. Int J Mol Sci 2022; 23:ijms23031114. [PMID: 35163036 PMCID: PMC8834722 DOI: 10.3390/ijms23031114] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2022] [Revised: 01/18/2022] [Accepted: 01/18/2022] [Indexed: 02/01/2023] Open
Abstract
Dopamine (DA) is the key regulator of reward behavior. The DA neurons in the ventral tegmental area (VTA) and their projection areas, which include the prefrontal cortex (PFC), nucleus accumbens (NAc), and amygdala, play a primary role in the process of reward-driven behavior induced by the drugs of addiction, including nicotine and alcohol. In our previous study, we developed a novel platform consisting of micro-LED array devices to stimulate a large area of the brain of rats and monkeys with photo-stimulation and a microdialysis probe to estimate the DA release in the PFC. Our results suggested that the platform was able to detect the increased level of dopamine in the PFC in response to the photo-stimulation of both the PFC and VTA. In this study, we used this platform to photo-stimulate the VTA neurons in both ChrimsonR-expressing (non-specific) wild and dopamine transporter (DAT)-Cre (dopamine specific) mice, and measured the dopamine release in the nucleus accumbens shell (NAcShell). We measured the DA release in the NAcShell in response to optogenetic stimulation of the VTA neurons and investigated the effect of GABAergic neurons on dopaminergic neurons by histochemical studies. Comparing the photo-stimulation frequency of 2 Hz with that of 20 Hz, the change in DA concentration at the NAcShell was greater at 20 Hz in both cases. When ChrimsonR was expressed specifically for DA, the release of DA at the NAcShell increased in response to photo-stimulation of the VTA. In contrast, when ChrimsonR was expressed non-specifically, the amount of DA released was almost unchanged upon photo-stimulation. However, for nonspecifically expressed ChrimsonR, intraperitoneal injection of bicuculline, a competitive antagonist at the GABA-binding site of the GABAA receptor, also significantly increased the release of DA at the NAcShell in response to photo-stimulation of the VTA. The results of immunochemical staining confirm that GABAergic neurons in the VTA suppress DA activation, and also indicate that alterations in GABAergic neurons may have serious downstream effects on DA activity, NAcShell release, and neural adaptation of the VTA. This study also confirms that optogenetics technology is crucial to study the relationship between the mesolimbic dopaminergic and GABAergic neurons in a neural-specific manner.
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Affiliation(s)
- Yasumi Ohta
- Nara Institute of Science and Technology, 8916-5, Ikoma 630-0101, Japan; (Y.O.); (T.E.M.); (M.K.); (M.H.); (H.T.); (H.T.); (K.S.); (J.O.)
| | - Takaaki E. Murakami
- Nara Institute of Science and Technology, 8916-5, Ikoma 630-0101, Japan; (Y.O.); (T.E.M.); (M.K.); (M.H.); (H.T.); (H.T.); (K.S.); (J.O.)
| | - Mamiko Kawahara
- Nara Institute of Science and Technology, 8916-5, Ikoma 630-0101, Japan; (Y.O.); (T.E.M.); (M.K.); (M.H.); (H.T.); (H.T.); (K.S.); (J.O.)
| | - Makito Haruta
- Nara Institute of Science and Technology, 8916-5, Ikoma 630-0101, Japan; (Y.O.); (T.E.M.); (M.K.); (M.H.); (H.T.); (H.T.); (K.S.); (J.O.)
| | - Hironari Takehara
- Nara Institute of Science and Technology, 8916-5, Ikoma 630-0101, Japan; (Y.O.); (T.E.M.); (M.K.); (M.H.); (H.T.); (H.T.); (K.S.); (J.O.)
| | - Hiroyuki Tashiro
- Nara Institute of Science and Technology, 8916-5, Ikoma 630-0101, Japan; (Y.O.); (T.E.M.); (M.K.); (M.H.); (H.T.); (H.T.); (K.S.); (J.O.)
| | - Kiyotaka Sasagawa
- Nara Institute of Science and Technology, 8916-5, Ikoma 630-0101, Japan; (Y.O.); (T.E.M.); (M.K.); (M.H.); (H.T.); (H.T.); (K.S.); (J.O.)
| | - Jun Ohta
- Nara Institute of Science and Technology, 8916-5, Ikoma 630-0101, Japan; (Y.O.); (T.E.M.); (M.K.); (M.H.); (H.T.); (H.T.); (K.S.); (J.O.)
| | - Metin Akay
- Department of Biomedical Engineering, University of Houston, Houston, TX 77204-5060, USA;
| | - Yasemin M. Akay
- Department of Biomedical Engineering, University of Houston, Houston, TX 77204-5060, USA;
- Correspondence:
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Olorocisimo JP, Briones J, Sasagawa K, Haruta M, Takehara H, Tashiro H, Ishida-Kitagawa N, Bessho Y, Ohta J. Ultrasmall compact CMOS imaging system for bioluminescence reporter-based live gene expression analysis. JOURNAL OF BIOMEDICAL OPTICS 2021; 26:JBO-210223R. [PMID: 34734515 PMCID: PMC8564164 DOI: 10.1117/1.jbo.26.11.116002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Accepted: 10/18/2021] [Indexed: 06/13/2023]
Abstract
SIGNIFICANCE Gene expression analysis is an important fundamental area of biomedical research. However, live gene expression imaging has proven challenging due to constraints in conventional optical devices and fluorescent reporters. AIM Our aim is to develop smaller, more cost-effective, and versatile imaging capabilities compared with conventional devices. Bioluminescence reporter-based gene expression analysis was targeted due to its advantages over fluorescence-based imaging. APPROACH We created a small compact imaging system using micro-CMOS image sensors (μCIS). The μCIS model had an improved pixel design and a patterned absorption filter array to detect the low light intensity of bioluminescence. RESULTS The device demonstrated lower dark current, lower temporal noise, and higher sensitivity compared with previous designs. The filter array enabled us to subtract dark current drift and attain a clearer light signal. These improvements allowed us to measure bioluminescence reporter-based gene expression in living mammalian cells. CONCLUSION Using our μCIS system for bioluminescence imaging in the future, the device can be implanted in vivo for simultaneous gene expression imaging, behavioral analysis, and optogenetic modulation.
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Affiliation(s)
- Joshua Philippe Olorocisimo
- Nara Institute of Science and Technology, Photonics Device Science Laboratory, Division of Materials Science, Graduate School of Science and Technology, Takayama, Ikoma, Nara, Japan
- Nara Institute of Science and Technology, Gene Regulation Research Laboratory, Division of Biological Science, Graduate School of Science and Technology, Takayama, Ikoma, Nara, Japan
| | - Jeric Briones
- Nara Institute of Science and Technology, Mathematical Informatics Laboratory, Division of Information Science, Takayama, Ikoma, Nara, Japan
- Advanced Telecommunications Research Institute International, Cognitive Mechanisms Laboratories, Kyoto, Japan
| | - Kiyotaka Sasagawa
- Nara Institute of Science and Technology, Photonics Device Science Laboratory, Division of Materials Science, Graduate School of Science and Technology, Takayama, Ikoma, Nara, Japan
| | - Makito Haruta
- Nara Institute of Science and Technology, Photonics Device Science Laboratory, Division of Materials Science, Graduate School of Science and Technology, Takayama, Ikoma, Nara, Japan
| | - Hironari Takehara
- Nara Institute of Science and Technology, Photonics Device Science Laboratory, Division of Materials Science, Graduate School of Science and Technology, Takayama, Ikoma, Nara, Japan
| | - Hiroyuki Tashiro
- Nara Institute of Science and Technology, Photonics Device Science Laboratory, Division of Materials Science, Graduate School of Science and Technology, Takayama, Ikoma, Nara, Japan
- Kyushu University, Department of Health Sciences, Faculty of Medical Sciences, Higashi, Fukuoka, Japan
| | - Norihiro Ishida-Kitagawa
- Nara Institute of Science and Technology, Gene Regulation Research Laboratory, Division of Biological Science, Graduate School of Science and Technology, Takayama, Ikoma, Nara, Japan
| | - Yasumasa Bessho
- Nara Institute of Science and Technology, Gene Regulation Research Laboratory, Division of Biological Science, Graduate School of Science and Technology, Takayama, Ikoma, Nara, Japan
| | - Jun Ohta
- Nara Institute of Science and Technology, Photonics Device Science Laboratory, Division of Materials Science, Graduate School of Science and Technology, Takayama, Ikoma, Nara, Japan
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