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Kc E, Islam J, Lee G, Park YS. Optogenetic Approach in Trigeminal Neuralgia and Potential Concerns: Preclinical Insights. Mol Neurobiol 2024; 61:1769-1780. [PMID: 37775720 DOI: 10.1007/s12035-023-03652-w] [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: 03/15/2023] [Accepted: 09/11/2023] [Indexed: 10/01/2023]
Abstract
The integration of optogenetics in the trigeminal pain circuitry broadens and reinforces existing pain investigations. Similar to research on spinal neuropathic pain, the exploration of the underlying determinants of orofacial pain is expanding. Optogenetics facilitates more direct, specific, and subtle investigations of the neuronal circuits involved in orofacial pain. One of the most significant concerns of both dentistry and medicine is trigeminal neuralgia (TN) management due to its substantial impact on a patient's quality of life. Our objective is to gather insights from preclinical studies conducted in TN employing an optogenetic paradigm, thereby extending the prospects for in-depth neurobiological research. This review highlights optogenetic research in trigeminal pain circuitry involving TN. We outline the central and peripheral regions associated with pain-that have been investigated using optogenetics in the trigeminal pain circuitry. The study further reports its scope and limitations as well as its potential for future applications from bench to bedside.
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Affiliation(s)
- Elina Kc
- Program in Neuroscience, Department of Medicine, College of Medicine, Chungbuk National University, Cheongju, Republic of Korea
| | - Jaisan Islam
- Program in Neuroscience, Department of Medicine, College of Medicine, Chungbuk National University, Cheongju, Republic of Korea
| | - Gabsang Lee
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- The Solomon H. Snyder, Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Young Seok Park
- Program in Neuroscience, Department of Medicine, College of Medicine, Chungbuk National University, Cheongju, Republic of Korea.
- Department of Neurosurgery, Chungbuk National University Hospital, Cheongju, Republic of Korea.
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Li C, Li Y, Zhang W, Ma Z, Xiao S, Xie W, Miao S, Li B, Lu G, Liu Y, Bai W, Yu S. Dopaminergic Projections from the Hypothalamic A11 Nucleus to the Spinal Trigeminal Nucleus Are Involved in Bidirectional Migraine Modulation. Int J Mol Sci 2023; 24:16876. [PMID: 38069205 PMCID: PMC10706593 DOI: 10.3390/ijms242316876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Revised: 11/24/2023] [Accepted: 11/25/2023] [Indexed: 12/18/2023] Open
Abstract
Clinical imaging studies have revealed that the hypothalamus is activated in migraine patients prior to the onset of and during headache and have also shown that the hypothalamus has increased functional connectivity with the spinal trigeminal nucleus. The dopaminergic system of the hypothalamus plays an important role, and the dopamine-rich A11 nucleus may play an important role in migraine pathogenesis. We used intraperitoneal injections of glyceryl trinitrate to establish a model of acute migraine attack and chronicity in mice, which was verified by photophobia experiments and von Frey experiments. We explored the A11 nucleus and its downstream pathway using immunohistochemical staining and neuronal tracing techniques. During acute migraine attack and chronification, c-fos expression in GABAergic neurons in the A11 nucleus was significantly increased, and inhibition of DA neurons was achieved by binding to GABA A-type receptors on the surface of dopaminergic neurons in the A11 nucleus. However, the expression of tyrosine hydroxylase and glutamic acid decarboxylase proteins in the A11 nucleus of the hypothalamus did not change significantly. Specific destruction of dopaminergic neurons in the A11 nucleus of mice resulted in severe nociceptive sensitization and photophobic behavior. The expression levels of the D1 dopamine receptor and D2 dopamine receptor in the caudal part of the spinal trigeminal nucleus candalis of the chronic migraine model were increased. Skin nociceptive sensitization of mice was slowed by activation of the D2 dopamine receptor in SP5C, and activation of the D1 dopamine receptor reversed this behavioral change. GABAergic neurons in the A11 nucleus were activated and exerted postsynaptic inhibitory effects, which led to a decrease in the amount of DA secreted by the A11 nucleus in the spinal trigeminal nucleus candalis. The reduced DA bound preferentially to the D2 dopamine receptor, thus exerting a defensive effect against headache.
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Affiliation(s)
- Chenhao Li
- Department of Neurology, The First Medical Center of Chinese PLA General Hospital, Beijing 100853, China; (C.L.); (Y.L.); (W.Z.); (Z.M.); (S.X.); (W.X.); (S.M.); (B.L.); (G.L.); (Y.L.); (W.B.)
- Medical School of Chinese PLA, Beijing 100853, China
| | - Yang Li
- Department of Neurology, The First Medical Center of Chinese PLA General Hospital, Beijing 100853, China; (C.L.); (Y.L.); (W.Z.); (Z.M.); (S.X.); (W.X.); (S.M.); (B.L.); (G.L.); (Y.L.); (W.B.)
- Medical School of Chinese PLA, Beijing 100853, China
| | - Wenwen Zhang
- Department of Neurology, The First Medical Center of Chinese PLA General Hospital, Beijing 100853, China; (C.L.); (Y.L.); (W.Z.); (Z.M.); (S.X.); (W.X.); (S.M.); (B.L.); (G.L.); (Y.L.); (W.B.)
- School of Medicine, Nankai University, Tianjin 300071, China
| | - Zhenjie Ma
- Department of Neurology, The First Medical Center of Chinese PLA General Hospital, Beijing 100853, China; (C.L.); (Y.L.); (W.Z.); (Z.M.); (S.X.); (W.X.); (S.M.); (B.L.); (G.L.); (Y.L.); (W.B.)
- Medical School of Chinese PLA, Beijing 100853, China
| | - Shaobo Xiao
- Department of Neurology, The First Medical Center of Chinese PLA General Hospital, Beijing 100853, China; (C.L.); (Y.L.); (W.Z.); (Z.M.); (S.X.); (W.X.); (S.M.); (B.L.); (G.L.); (Y.L.); (W.B.)
- Medical School of Chinese PLA, Beijing 100853, China
| | - Wei Xie
- Department of Neurology, The First Medical Center of Chinese PLA General Hospital, Beijing 100853, China; (C.L.); (Y.L.); (W.Z.); (Z.M.); (S.X.); (W.X.); (S.M.); (B.L.); (G.L.); (Y.L.); (W.B.)
| | - Shuai Miao
- Department of Neurology, The First Medical Center of Chinese PLA General Hospital, Beijing 100853, China; (C.L.); (Y.L.); (W.Z.); (Z.M.); (S.X.); (W.X.); (S.M.); (B.L.); (G.L.); (Y.L.); (W.B.)
| | - Bozhi Li
- Department of Neurology, The First Medical Center of Chinese PLA General Hospital, Beijing 100853, China; (C.L.); (Y.L.); (W.Z.); (Z.M.); (S.X.); (W.X.); (S.M.); (B.L.); (G.L.); (Y.L.); (W.B.)
| | - Guangshuang Lu
- Department of Neurology, The First Medical Center of Chinese PLA General Hospital, Beijing 100853, China; (C.L.); (Y.L.); (W.Z.); (Z.M.); (S.X.); (W.X.); (S.M.); (B.L.); (G.L.); (Y.L.); (W.B.)
- Medical School of Chinese PLA, Beijing 100853, China
| | - Yingyuan Liu
- Department of Neurology, The First Medical Center of Chinese PLA General Hospital, Beijing 100853, China; (C.L.); (Y.L.); (W.Z.); (Z.M.); (S.X.); (W.X.); (S.M.); (B.L.); (G.L.); (Y.L.); (W.B.)
- Medical School of Chinese PLA, Beijing 100853, China
| | - Wenhao Bai
- Department of Neurology, The First Medical Center of Chinese PLA General Hospital, Beijing 100853, China; (C.L.); (Y.L.); (W.Z.); (Z.M.); (S.X.); (W.X.); (S.M.); (B.L.); (G.L.); (Y.L.); (W.B.)
| | - Shengyuan Yu
- Department of Neurology, The First Medical Center of Chinese PLA General Hospital, Beijing 100853, China; (C.L.); (Y.L.); (W.Z.); (Z.M.); (S.X.); (W.X.); (S.M.); (B.L.); (G.L.); (Y.L.); (W.B.)
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Yoshikawa C, Maegawa H, Usami N, Hanamoto H, Kudo C, Niwa H. Antagonist of transient receptor potential melastatin 2 suppresses mechanical hypersensitivity and activation of microglia induced by infraorbital nerve ligation in male rats. Biochem Biophys Res Commun 2023; 671:67-74. [PMID: 37295356 DOI: 10.1016/j.bbrc.2023.06.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2023] [Accepted: 06/02/2023] [Indexed: 06/12/2023]
Abstract
Activation of microglia is known to be involved in neuropathic pain. However, the pathway that regulates the microglial activation is not completely understood. Transient receptor potential (TRP) melastatin 2 (TRPM2), which is part of the TRP superfamily, is reportedly expressed on microglia and is suggested to be involved in neuropathic pain. To explore the effect of a TRPM2 antagonist on orofacial neuropathic pain and the relationship between TRPM2 and the activation of microglia, experiments were conducted using male rats that underwent infraorbital nerve (ION) ligation as orofacial neuropathic pain models. TRPM2 expression was detected on microglia in the trigeminal spinal subnucleus caudalis (Vc). The immunoreactivity of TRPM2 in the Vc increased after ION ligation. Mechanical threshold for head-withdrawal response was measured using von Frey filament, and it decreased after ION ligation. When the TRPM2 antagonist was administered to the ION-ligated rats, the low mechanical threshold for head-withdrawal response increased, and the number of phosphorylated extracellular signal-regulated kinase (pERK)-immunoreactive cells in the Vc decreased. The number of CD68-immunoreactive cells in the Vc also decreased after the administration of the TRPM2 antagonist in the ION-ligated rats. These findings suggest that TRPM2 antagonist administration suppresses hypersensitivity to mechanical stimulation induced by ION ligation and microglial activation, and TRPM2 is also involved in microglial activation in orofacial neuropathic pain.
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Affiliation(s)
- Chiaki Yoshikawa
- Department of Dental Anesthesiology, Osaka University Graduate School of Dentistry, Suita, Osaka, 565-0871, Japan.
| | - Hiroharu Maegawa
- Department of Dental Anesthesiology, Osaka University Graduate School of Dentistry, Suita, Osaka, 565-0871, Japan.
| | - Nayuka Usami
- Department of Dental Anesthesiology, Osaka University Graduate School of Dentistry, Suita, Osaka, 565-0871, Japan.
| | - Hiroshi Hanamoto
- Department of Dental Anesthesiology, Osaka University Graduate School of Dentistry, Suita, Osaka, 565-0871, Japan.
| | - Chiho Kudo
- Department of Dental Anesthesiology, Osaka University Graduate School of Dentistry, Suita, Osaka, 565-0871, Japan.
| | - Hitoshi Niwa
- Department of Dental Anesthesiology, Osaka University Graduate School of Dentistry, Suita, Osaka, 565-0871, Japan.
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Cerebroventricular administration of anti-calcitonin gene-related peptide antibody reduces the increase of dopamine D2 receptor observed in the trigeminal spinal subnucleus caudalis following infraorbital nerve ligation. Biochem Biophys Res Commun 2022; 614:78-84. [DOI: 10.1016/j.bbrc.2022.05.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2022] [Revised: 04/26/2022] [Accepted: 05/04/2022] [Indexed: 11/19/2022]
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Meng Z, Chen H, Deng C, Meng S. Potential cellular endocrinology mechanisms underlying the effects of Chinese herbal medicine therapy on asthma. Front Endocrinol (Lausanne) 2022; 13:916328. [PMID: 36051395 PMCID: PMC9424672 DOI: 10.3389/fendo.2022.916328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/09/2022] [Accepted: 07/04/2022] [Indexed: 11/20/2022] Open
Abstract
Asthma is a complex syndrome with polygenetic tendency and multiple phenotypes, which has variable expiratory airflow limitation and respiratory symptoms that vary over time and in intensity. In recent years, continuous industrial development has seriously impacted the climate and air quality at a global scale. It has been verified that climate change can induce asthma in predisposed individuals and that atmospheric pollution can exacerbate asthma severity. At present, a subset of patients is resistant to the drug therapy for asthma. Hence, it is urgent to find new ideas for asthma prevention and treatment. In this review, we discuss the prescription, composition, formulation, and mechanism of traditional Chinese medicine monomer, traditional Chinese medicine monomer complex, single herbs, and traditional Chinese patent medicine in the treatment of asthma. We also discuss the effects of Chinese herbal medicine on asthma from the perspective of cellular endocrinology in the past decade, emphasizing on the roles as intracellular and extracellular messengers of three substances-hormones, substances secreted by pulmonary neuroendocrine cells, and neuroendocrine-related signaling protein-which provide the theoretical basis for clinical application and new drug development.
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Affiliation(s)
- Zeyu Meng
- The Second Clinical Medical College, Heilongjiang University of Chinese Medicine, Harbin, China
| | - Huize Chen
- Department of Traditional Chinese Medicine, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai, China
| | - Chujun Deng
- Department of Traditional Chinese Medicine, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai, China
| | - Shengxi Meng
- Department of Traditional Chinese Medicine, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai, China
- *Correspondence: Shengxi Meng,
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Maegawa H, Yoshikawa C, Usami N, Hanamoto H, Kudo C, Niwa H. Anti-calcitonin gene-related peptide antibody attenuates orofacial mechanical and heat hypersensitivities induced by infraorbital nerve injury. Biochem Biophys Res Commun 2021; 569:147-153. [PMID: 34245979 DOI: 10.1016/j.bbrc.2021.07.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2021] [Accepted: 07/02/2021] [Indexed: 01/06/2023]
Abstract
Currently, limited information regarding the role of calcitonin gene-related peptide (CGRP) in neuropathic pain is available. Intracerebroventricular administrations of an anti-CGRP antibody were performed in rats with infraorbital nerve ligation. Anti-CGRP antibody administration attenuated mechanical and heat hypersensitivities induced by nerve ligation and decreased the phosphorylated extracellular signal-regulated kinase expression levels in the trigeminal spinal subnucleus caudalis (Vc) following mechanical or heat stimulation. An increased CGRP immunoreactivity in the Vc appeared after nerve ligation. A decreased CGRP immunoreactivity resulted from anti-CGRP antibody administration. Our findings suggest that anti-CGRP antibody administration attenuates the symptoms of trigeminal neuropathic pain by acting on CGRP in the Vc.
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Affiliation(s)
- Hiroharu Maegawa
- Department of Dental Anesthesiology, Osaka University Graduate School of Dentistry, Suita, Osaka 565-0871, Japan.
| | - Chiaki Yoshikawa
- Department of Dental Anesthesiology, Osaka University Graduate School of Dentistry, Suita, Osaka 565-0871, Japan.
| | - Nayuka Usami
- Department of Dental Anesthesiology, Osaka University Graduate School of Dentistry, Suita, Osaka 565-0871, Japan.
| | - Hiroshi Hanamoto
- Department of Dental Anesthesiology, Osaka University Graduate School of Dentistry, Suita, Osaka 565-0871, Japan.
| | - Chiho Kudo
- Department of Dental Anesthesiology, Osaka University Graduate School of Dentistry, Suita, Osaka 565-0871, Japan.
| | - Hitoshi Niwa
- Department of Dental Anesthesiology, Osaka University Graduate School of Dentistry, Suita, Osaka 565-0871, Japan.
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