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Ishikawa T, Uta D, Okuda H, Potapenko I, Hori K, Kume T, Ozaki N. Combined Experiments with in Vivo Fiber Photometry and Behavior Tests Can Facilitate the Measurement of Neuronal Activity in the Primary Somatosensory Cortex and Hyperalgesia in an Inflammatory Pain Mice Model. Biol Pharm Bull 2024; 47:591-599. [PMID: 38447991 DOI: 10.1248/bpb.b23-00700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2024]
Abstract
The pain matrix, which includes several brain regions that respond to pain sensation, contribute to the development of chronic pain. Thus, it is essential to understand the mechanism of causing chronic pain in the pain matrix such as anterior cingulate (ACC), or primary somatosensory (S1) cortex. Recently, combined experiment with the behavior tests and in vivo calcium imaging using fiber photometry revealed the interaction between the neuronal function in deep brain regions of the pain matrix including ACC and the phenotype of chronic pain. However, it remains unclear whether this combined experiment can identify the interaction between neuronal activity in S1, which receive pain sensation, and pain behaviors such as hyperalgesia or allodynia. In this study, to examine whether the interaction between change of neuronal activity in S1 and hyperalgesia in hind paw before and after causing inflammatory pain was detected from same animal, the combined experiment of in vivo fiber photometry system and von Frey hairs test was applied. This combined experiment detected that amplitude of calcium responses in S1 neurons increased and the mechanical threshold of hind paw decreased from same animals which have an inflammatory pain. Moreover, we found that the values between amplitude of calcium responses and mechanical thresholds were shifted to negative correlation after causing inflammatory pain. Thus, the combined experiment with fiber photometry and the behavior tests has a possibility that can simultaneously consider the interaction between neuronal activity in pain matrix and pain induced behaviors and the effects of analgesics or pain treatments.
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Affiliation(s)
- Tatsuya Ishikawa
- Department of Functional Anatomy, Graduate School of Medical Science, Kanazawa University
| | - Daisuke Uta
- Department of Applied Pharmacology, Faculty of Pharmaceutical Sciences, University of Toyama
| | - Hiroaki Okuda
- Department of Functional Anatomy, Graduate School of Medical Science, Kanazawa University
| | - Ilia Potapenko
- Department of Functional Anatomy, Graduate School of Medical Science, Kanazawa University
| | - Kiyomi Hori
- Department of Functional Anatomy, Graduate School of Medical Science, Kanazawa University
| | - Toshiaki Kume
- Department of Applied Pharmacology, Faculty of Pharmaceutical Sciences, University of Toyama
| | - Noriyuki Ozaki
- Department of Functional Anatomy, Graduate School of Medical Science, Kanazawa University
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Ishikawa T, Murata K, Okuda H, Potapenko I, Hori K, Furuyama T, Yamamoto R, Ono M, Kato N, Fukazawa Y, Ozaki N. Pain related neuronal ensembles in the primary somatosensory cortex contribute to hyperalgesia and anxiety. iScience 2023; 26:106332. [PMID: 36968067 PMCID: PMC10033994 DOI: 10.1016/j.isci.2023.106332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 11/28/2022] [Accepted: 03/01/2023] [Indexed: 03/07/2023] Open
Abstract
The mechanism by which acute pain or itch information at the periphery is processed in the primary somatosensory cortex (S1) remains unclear. To elucidate this, we used a viral-mediated targeted-recombination-in-active population system to target S1 neuronal ensembles that are active during pain or itch sensations. We induced the expression of excitatory or inhibitory designer receptors exclusively activated by designer drugs in pain- or itch-related S1 neurons. We identified neuronal populations in mice that regulate the sensory components of pain and itch in the S1 hind paw region. Notably, the neuronal circuit between pain-related S1 neurons and the parafascicular nucleus contributed to hyperalgesia and anxiety-like behavior. We propose that S1 plays an essential role in sensory and affective responses to noxious stimuli, such as pain.
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Affiliation(s)
- Tatsuya Ishikawa
- Department of Functional Anatomy, Graduate School of Medical Science, Kanazawa University, Takara-machi, Kanazawa 920-8640, Japan
- Corresponding author
| | - Koshi Murata
- Department of Brain Structure and Function, Faculty of Medical Sciences, University of Fukui, Yoshida-gun, Fukui 910-1193, Japan
- Life Science Innovation Center, Faculty of Medical Science, University of Fukui, Fukui 910-1193, Japan
| | - Hiroaki Okuda
- Department of Functional Anatomy, Graduate School of Medical Science, Kanazawa University, Takara-machi, Kanazawa 920-8640, Japan
| | - Ilia Potapenko
- Department of Functional Anatomy, Graduate School of Medical Science, Kanazawa University, Takara-machi, Kanazawa 920-8640, Japan
| | - Kiyomi Hori
- Department of Functional Anatomy, Graduate School of Medical Science, Kanazawa University, Takara-machi, Kanazawa 920-8640, Japan
| | - Takafumi Furuyama
- Department of Physiology, Kanazawa Medical University, Ishikawa 920-0293, Japan
| | - Ryo Yamamoto
- Department of Physiology, Kanazawa Medical University, Ishikawa 920-0293, Japan
| | - Munenori Ono
- Department of Physiology, Kanazawa Medical University, Ishikawa 920-0293, Japan
| | - Nobuo Kato
- Department of Physiology, Kanazawa Medical University, Ishikawa 920-0293, Japan
| | - Yugo Fukazawa
- Department of Brain Structure and Function, Faculty of Medical Sciences, University of Fukui, Yoshida-gun, Fukui 910-1193, Japan
- Life Science Innovation Center, Faculty of Medical Science, University of Fukui, Fukui 910-1193, Japan
| | - Noriyuki Ozaki
- Department of Functional Anatomy, Graduate School of Medical Science, Kanazawa University, Takara-machi, Kanazawa 920-8640, Japan
- Corresponding author
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