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Zhang K, Liu W, Shen F, Luan G, Han Y, Xu J, Fu C, Wu W, Hou Y, Jiang M, Zhang T, Bai G. Ligustilide covalently binds to Cys703 in the pre-S1 helix of TRPA1, blocking the opening of channel and relieving pain in rats with acute soft tissue injury. J Ethnopharmacol 2024; 330:118217. [PMID: 38641072 DOI: 10.1016/j.jep.2024.118217] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Revised: 04/04/2024] [Accepted: 04/16/2024] [Indexed: 04/21/2024]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE The natural anodyne Ligustilide (Lig), derived from Angelica sinensis (Oliv.) Diels and Ligusticum chuanxiong Hort., has been traditionally employed for its analgesic properties in the treatment of dysmenorrhea and migraine, and rheumatoid arthritis pain. Despite the existing reports on the correlation between TRP channels and the analgesic effects of Lig, a comprehensive understanding of their underlying mechanisms of action remains elusive. AIM OF THE STUDY The objective of this study is to elucidate the mechanism of action of Lig on the analgesic target TRPA1 channel. METHODS The therapeutic effect of Lig was evaluated in a rat acute soft tissue injury model. The analgesic target was identified through competitive inhibition of TRP channel agonists at the animal level, followed by Fluo-4/Ca2+ imaging on live cells overexpressing TRP proteins. The potential target was verified through in-gel imaging, colocalization using a Lig-derived molecular probe, and a drug affinity response target stability assay. The binding site of Lig was identified through protein spectrometry and further analyzed using molecular docking, site-specific mutation, and multidisciplinary approaches. RESULTS The administration of Lig effectively ameliorated pain and attenuated oxidative stress and inflammatory responses in rats with soft tissue injuries. Moreover, the analgesic effects of Lig were specifically attributed to TRPA1. Mechanistic studies have revealed that Lig directly activates TRPA1 by interacting with the linker domain in the pre-S1 region of TRPA1. Through metabolic transformation, 6,7-epoxyligustilide (EM-Lig) forms a covalent bond with Cys703 of TRPA1 at high concentrations and prolonged exposure time. This irreversible binding prevents endogenous electrophilic products from entering the cysteine active center of ligand-binding pocket of TRPA1, thereby inhibiting Ca2+ influx through the channel opening and ultimately relieving pain. CONCLUSIONS Lig selectively modulates the TRPA1 channel in a bimodal manner via non-electrophilic/electrophilic metabolic conversion. The epoxidized metabolic intermediate EM-Lig exerts analgesic effects by irreversibly inhibiting the activation of TRPA1 on sensory neurons. These findings not only highlight the analgesic mechanism of Lig but also offer a novel nucleophilic attack site for the development of TRPA1 antagonists in the pre-S1 region.
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Affiliation(s)
- Kaixue Zhang
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300353, PR China
| | - Wenjuan Liu
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300353, PR China
| | - Fukui Shen
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300353, PR China
| | - Guoqing Luan
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300353, PR China
| | - Yanqi Han
- State Key Laboratory of Drug Delivery Technology and Pharmacokinetics, Tianjin Key Laboratory of Quality Markers of Traditional Chinese Medicine, Tianjin Institute of Pharmaceutical Research, Tianjin, 300462, PR China
| | - Jun Xu
- State Key Laboratory of Drug Delivery Technology and Pharmacokinetics, Tianjin Key Laboratory of Quality Markers of Traditional Chinese Medicine, Tianjin Institute of Pharmaceutical Research, Tianjin, 300462, PR China
| | - Cheng Fu
- Jiangxi Baishen Changnuo Pharmaceutical Co., Ltd., Fuzhou, 344000, PR China
| | - Weidong Wu
- Jiangxi Baishen Changnuo Pharmaceutical Co., Ltd., Fuzhou, 344000, PR China
| | - Yuanyuan Hou
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300353, PR China
| | - Min Jiang
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300353, PR China.
| | - Tiejun Zhang
- State Key Laboratory of Drug Delivery Technology and Pharmacokinetics, Tianjin Key Laboratory of Quality Markers of Traditional Chinese Medicine, Tianjin Institute of Pharmaceutical Research, Tianjin, 300462, PR China.
| | - Gang Bai
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300353, PR China.
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Li H, Wang C, Gong Z, Nie L, Xu J, Wang M. Transient Receptor Potential Ankyrin 1-dependent Activation of Extracellular Signal-regulated Kinase 2 in the Cerebral Cortices Contributes to Cortical Spreading Depolarization. Neuroscience 2024; 543:90-100. [PMID: 38417540 DOI: 10.1016/j.neuroscience.2024.02.009] [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] [Received: 11/20/2023] [Revised: 02/07/2024] [Accepted: 02/12/2024] [Indexed: 03/01/2024]
Abstract
Extracellular signal-regulated kinase (ERK) are serine/threonine-selective proteins and ERK1/2 can be phosphorylated in peripheral and central brain regions after cortical spreading depolarization (CSD) and calcitonin gene-related peptide; However, it remains unclear about whether and how ERK activity modulates CSD that correlates to migraine aura. Here, we determined the role of ERK in regulating CSD and explored the underlying mechanism involving transient receptor potential ankyrin 1 (TRPA1), a stress-sensing cation channel. CSD was recorded using intrinsic optical imaging in mouse brain slices, and electrophysiology in rats. Phosphorylated ERK (pERK1/2) and interleukin-1β (IL-1β) protein levels were detected using Western blot or enzyme-linked immunosorbent assay, respectively. IL-1β mRNA level was detected using qPCR. The results showed that an ERK inhibitor, SCH77298, markedly prolonged CSD latency and reduced propagation rate in mouse brain slices. Corresponding to this, CSD induction increased levels of cytosolic pERK1/2 in ipsilateral cerebral cortices of rats, the elevation of which correlated to the level of IL-1β mRNA. Mechanistic analysis showed that pre-treatment of an anti-TRPA1 antibody reduced the cytosolic pERK2 level but not pERK1 following CSD in cerebral cortices of rats and this level of pERK2 correlated with that of cerebral cortical IL-1β protein. Furthermore, an ERK activator, AES16-2M, but not its scrambled control, reversed the prolonged CSD latency by a TRPA1 inhibitor, HC-030031, in mouse brain slices. These data revealed a crucial role of ERK activity in regulating CSD, and elevation of pERK and IL-1β production induced by CSD is predominantly TRPA1 channel-dependent, thereby contributing to migraine pathogenesis.
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Affiliation(s)
- Haoyang Li
- Department of Biological Sciences, Centre for Neuroscience, School of Science, Xi'an Jiaotong-Liverpool University, China
| | - Chenyi Wang
- Department of Biological Sciences, Centre for Neuroscience, School of Science, Xi'an Jiaotong-Liverpool University, China
| | - Ziyang Gong
- Department of Biological Sciences, Centre for Neuroscience, School of Science, Xi'an Jiaotong-Liverpool University, China
| | - Lingdi Nie
- Department of Biological Sciences, Centre for Neuroscience, School of Science, Xi'an Jiaotong-Liverpool University, China
| | - Jiaxin Xu
- Department of Biological Sciences, Centre for Neuroscience, School of Science, Xi'an Jiaotong-Liverpool University, China
| | - Minyan Wang
- Department of Biological Sciences, Centre for Neuroscience, School of Science, Xi'an Jiaotong-Liverpool University, China.
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Usui Y, Iwanishi H, Sumioka T, Ichikawa K, Miyajima M, Usui-Kusumoto K, Reinach PS, Okada Y, Saika S. Engineered Knockout of TRPA1 Inhibits Laser-Induced Choroidal Neovascularization Along With Associated TGFβ1 Expression and Neutrophil Infiltration. J Transl Med 2023; 103:100256. [PMID: 37797886 DOI: 10.1016/j.labinv.2023.100256] [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] [Received: 03/08/2022] [Revised: 07/20/2023] [Accepted: 08/28/2023] [Indexed: 10/07/2023] Open
Abstract
We examined the effects of gene ablation and chemical inhibition of transient receptor potential ankyrin 1 (TRPA1) on the growth of experimental argon laser-induced choroidal neovascularization (CNV) in mice. CNV was induced in the eyes of 6- to 8-week-old TRPA1-null (knockout [KO]) and wild-type (WT) mice by argon laser irradiation. Gene expression analysis was performed in laser-injured tissues at days 1 and 3. CNV growth was evaluated at day 14. Reciprocal bone marrow transplantation was performed between each genotype to identify the components responsible for either recipient tissue or bone marrow-derived inflammatory cells. Our results show that laser irradiation successfully induced CNV growth at the site of laser injury. The size of induced CNV was significantly smaller in KO mice than in WT mice at day 14, as determined by angiography with fluorescein isothiocyanate-dextran. Invasion of neutrophils, but not macrophages, was suppressed in association with suppression of the expression of transforming growth factor β1 and interleukin 6 in laser-irradiated KO tissue. Bone marrow transplantation indicated that the genotype of the recipient mouse, but not of inflammatory cells, is attributable to the KO phenotype. Systemic administration of a TRPA1 antagonist also reduced the CNV in a WT mouse. In conclusion, TRPA1 signaling in local cells is involved in growth of laser-induced CNV. The phenotype was not attributable to vascular endothelial cells and inflammatory cells. Blocking TRPA1 signal may therefore be a potential treatment strategy for CNV-related ocular diseases.
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Affiliation(s)
- Yuta Usui
- Department of Ophthalmology, Wakayama Medical University School of Medicine, Wakayama, Japan
| | - Hiroki Iwanishi
- Department of Ophthalmology, Wakayama Medical University School of Medicine, Wakayama, Japan.
| | - Takayoshi Sumioka
- Department of Ophthalmology, Wakayama Medical University School of Medicine, Wakayama, Japan
| | - Kana Ichikawa
- Department of Ophthalmology, Wakayama Medical University School of Medicine, Wakayama, Japan
| | - Masayasu Miyajima
- Department of Ophthalmology, Wakayama Medical University School of Medicine, Wakayama, Japan
| | - Keiko Usui-Kusumoto
- Department of Ophthalmology, Wakayama Medical University School of Medicine, Wakayama, Japan
| | - Peter Sol Reinach
- Department of Ophthalmology and Optometry, Wenzhou Medical University School, Wenzhou, People's Republic of China
| | - Yuka Okada
- Department of Ophthalmology, Wakayama Medical University Kihoku Hospital, Wakayama, Japan
| | - Shizuya Saika
- Department of Ophthalmology, Wakayama Medical University School of Medicine, Wakayama, Japan
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ZHAO Y, YAN X, JIANG S, LIU Y, DONG C, CHI H, MAO C. Zhenxin Anshen formula ameliorates atopic der-matitis-like skin dysfunction in mice and regulation of transient receptor potential vanilloid 1 and transient receptor potential ankyrin 1 in Neural pathways. J TRADIT CHIN MED 2023; 43:887-896. [PMID: 37679976 PMCID: PMC10465825 DOI: 10.19852/j.cnki.jtcm.20230802.003] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2022] [Accepted: 06/15/2022] [Indexed: 09/09/2023]
Abstract
OBJECTIVE To investigate the efficacy of Zhenxin Anshen formula (, ZXAS) on atopic dermatitis (AD) by transient receptor potential vanilloid 1 (TRPV1) and transient receptor potential ankyrin 1 (TRPA1) signalling pathway in mice and . METHODS AD-like lesions were induced by 1-chloro-2,4-dinitrobenzene (DNCB) to the shaved dorsal skin of BALB/c mice. BALB/c mice were divided into five groups: normal control, model control, cetirizine, low-, medium-, and high-dose of ZXAS. After ZXAS in-tervention, the skin lesions and blood samples were collected for hematoxylin and eosin-stained and measuring the concentrations of inflammatory cytokines. Immun-oglobulin E (IgE), interleukin (IL)-4, IL-5, IL-13, and thymic stromal lymphopoietin (TSLP) were de-tected by Enzyme-linked immunosorbent assay (ELISA). The spinal cords were collected for measuring the expression of gastrin-releasing peptide receptor (GRPR), TRPV1, and TRPA1 by using immunohistochemistry, western blotting, and quantitative real-time polymerase chain reaction (qRT-PCR) analyses. In addition, 3-(4,5-dimethylthiazolyl-2)-2, 5-diphenyltetrazolium bromide (MTT) assay, flow cytometry, ELISA, and Western blotting were conducted for analysis of primary dorsal root ganglia (DRG) neurons . RESULTS ZXAS treatment improved DNCB-induced AD-like lesions through reducing dermatitis score, number of scratching and epidermal thickness, accompanied by the de-creased IgE and Th2 inflammatory cytokines. ZXAS also supressed the mRNA and protein expression of GRPR, TRPV1, and TRPA1 in the spinal cord. The medicated sera of ZXAS decreased capsaicin-induced Ca influx and downregulated the expression of TRPV1, TRPA1, and phospholipase C in DRG neurons. CONCLUSIONS The therapeutic effect of ZXAS on AD may be related to the regulation of TRPV1 and TRPA1 and inhibition of Ca2+ signals in neurons.
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Affiliation(s)
- Yiding ZHAO
- 1 Department of Dermatology, Shaanxi Provincial Hospital of traditional Chinese Medicine, Xi’an 710003, China
| | - Xiaoning YAN
- 1 Department of Dermatology, Shaanxi Provincial Hospital of traditional Chinese Medicine, Xi’an 710003, China
| | - Shanshan JIANG
- 1 Department of Dermatology, Shaanxi Provincial Hospital of traditional Chinese Medicine, Xi’an 710003, China
| | - Yong LIU
- 1 Department of Dermatology, Shaanxi Provincial Hospital of traditional Chinese Medicine, Xi’an 710003, China
| | - Chun DONG
- 1 Department of Dermatology, Shaanxi Provincial Hospital of traditional Chinese Medicine, Xi’an 710003, China
| | - Huiyan CHI
- 2 Department of Dermatology, Xiyuan Hospital China Academy of Chinese Medical Sciences, Beijing 100193, China
| | - Chaoyi MAO
- 3 Department of Education Management, China Academy of Chinese Medical Sciences, Beijing 100700, China
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Usui Y, Iwanishi H, Sumioka T, Ichikawa K, Miyajima M, Usui-Kusumoto K, Reinach PS, Okada Y, Saika S. WITHDRAWN: Engineered knockout of TRPA1 inhibits laser-induced choroidal neovascularization along with associated TGFb1 expression and neutrophil infiltration. J Transl Med 2023:100232. [PMID: 37567390 DOI: 10.1016/j.labinv.2023.100232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 07/20/2023] [Accepted: 07/20/2023] [Indexed: 08/13/2023] Open
Affiliation(s)
- Yuta Usui
- Department of Ophthalmology, Wakayama Medical University School of Medicine, Wakayama, Japan
| | - Hiroki Iwanishi
- Department of Ophthalmology, Wakayama Medical University School of Medicine, Wakayama, Japan
| | - Takayoshi Sumioka
- Department of Ophthalmology, Wakayama Medical University School of Medicine, Wakayama, Japan
| | - Kana Ichikawa
- Department of Ophthalmology, Wakayama Medical University School of Medicine, Wakayama, Japan
| | - Masayasu Miyajima
- Department of Ophthalmology, Wakayama Medical University School of Medicine, Wakayama, Japan
| | - Keiko Usui-Kusumoto
- Department of Ophthalmology, Wakayama Medical University School of Medicine, Wakayama, Japan
| | - Peter Sol Reinach
- Ophthalmology and Optometry, Wenzhou Medical University School, Wenzhou, China
| | - Yuka Okada
- Department of Ophthalmology, Wakayama Medical University Kihoku Hospital, Wakayama, Japan
| | - Shizuya Saika
- Department of Ophthalmology, Wakayama Medical University School of Medicine, Wakayama, Japan
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Guo BC, Kuo KL, Huang JW, Chen CH, Tarng DC, Lee TS. Di-(2-ethylhexyl) Phthalate Limits the Lipid-Lowering Effects of Simvastatin by Promoting Protein Degradation of Low-Density Lipoprotein Receptor: Role of PPARγ-PCSK9 and LXRα-IDOL Signaling Pathways. Antioxidants (Basel) 2023; 12. [PMID: 36830035 DOI: 10.3390/antiox12020477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 02/07/2023] [Accepted: 02/08/2023] [Indexed: 02/16/2023] Open
Abstract
Dialysis prevents death from uremia in patients with end-stage renal disease (ESRD). Nevertheless, during hemodialysis, circulating levels of di-(2-ethylhexyl) phthalate (DEHP) are increased due to phthalates leaching from medical tubes. Statins are an effective therapy for reducing the risks associated with cardiovascular diseases in patients with chronic kidney disease; however, the mechanism by which statins fail to reduce cardiovascular events in hemodialysis ESRD patients remains unclear. In this study, we investigated whether DEHP and its metabolites interfere with the lipid-lowering effect of statins in hepatocytes. In Huh7 cells, treatment with DEHP and its metabolites abolished the simvastatin-conferred lipid-lowering effect. Mechanistically, DEHP down-regulated the expression of low-density lipoprotein receptor (LDLR) and led to a decrease in LDL binding, which was mediated by the activation of the PPARγ-PCSK9 and LXRα-IDOL signaling pathways. Additionally, the NOX-ROS-TRPA1 pathway is involved in the DEHP-mediated inhibition of LDLR expression and LDL binding activity. Blockage of this pathway abrogated the DEHP-mediated inhibition in the LDLR expression and LDL binding of simvastatin. Collectively, DEHP induces the activation of the NOX-ROS-TRPA1 pathway, which in turn activates PPARγ-PCSK9- and LXRα-IDOL-dependent signaling, and, ultimately, diminishes the statin-mediated lipid-lowering effect in hepatocytes.
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Liu X, Gong R, Peng L, Zhao J. Toll-like receptor 4 signaling pathway in sensory neurons mediates remifentanil-induced postoperative hyperalgesia via transient receptor potential ankyrin 1. Mol Pain 2023; 19:17448069231158290. [PMID: 36733260 PMCID: PMC9926008 DOI: 10.1177/17448069231158290] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Background: Remifentanil-induced postoperative hyperalgesia (RIH) refers to a state of hyperalgesia or aggravated pre-existing pain after remifentanil exposure. There has been considerable interest in understanding and preventing RIH. However, the mechanisms responsible for RIH are still not completely understood. Toll-like receptor 4 (TLR4), a classic innate immune receptor, has been detected in sensory neurons and participates in various nociceptive conditions, whereas its role in RIH remains unclear. Transient receptor potential ankyrin 1 (TRPA1) always serves as a nociceptive channel, whereas its role in RIH has not yet been investigated. This study aimed to determine whether the TLR4 signaling pathway in sensory neurons engaged in the development of RIH and the possible involvement of TRPA1 during this process. Methods: A rat model of remifentanil-induced postoperative hyperalgesia (RIH) was established, which presented decreased paw withdrawal mechanical threshold (PWMT) and paw withdrawal thermal latency (PWTL). The mRNA and protein expression levels of TLR4, phosphorylated NF-κB, and TRPA1 in the dorsal root ganglion (DRG) from RIH model were analyzed by real-time PCR, western blot, and immunofluorescence. The TLR4 antagonist TAK-242 and the TRPA1 antagonist HC-030031 were applied to determine the role of sensory neuron TLR4 signaling and TRPA1 in RIH. Results: Compared with control, PWMT and PWTL were significantly decreased in RIH model. Moreover, the mRNA and protein expression of TLR4 and TRPA1 in DRG were upregulated after remifentanil exposure together with increased NF-κB phosphorylation. TLR4 antagonist TAK-242 mitigated mechanical pain in RIH together with downregulated expression of TLR4, phosphorylated NF-κB, and TRPA1 in DRG neurons. In addition, TRPA1 antagonist HC-030031 also alleviated mechanical pain and decreased TRPA1 expression in RIH without affecting TLR4 signaling in DRG. Conclusions: Taken together, these results suggested that activation of TLR4 signaling pathway engaged in the development of RIH by regulating TRPA1 in DRG neurons. Blocking TLR4 and TRPA1 might serve as a promising therapeutic strategy for RIH.
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Affiliation(s)
- Xiaowen Liu
- Department of Anesthesiology,
China-Japan Friendship Hospital,
Beijing, China
| | - Ruisong Gong
- Department of Anesthesiology,
Peking
Union Medical College Hospital,
Beijing, China
| | - Liang Peng
- Beijing Key Laboratory for
Immune-Mediated Inflammatory Diseases, Institute of Medical Science,
China-Japan Friendship Hospital,
Beijing, China
| | - Jing Zhao
- Department of Anesthesiology,
China-Japan Friendship Hospital,
Beijing, China,Jing Zhao, Department of Anesthesiology,
China-Japan Friendship Hospital, 2 Yinghua Dongjie, Hepingli, Beijing 100029,
China.
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Xia M, Chen YJ, Chen B, Ru X, Wang J, Lin J, Tang X, Chen W, Hu R, Li W, Feng H. Knockout of transient receptor potential ankyrin 1 (TRPA1) modulates the glial phenotype and alleviates perihematomal neuroinflammation after intracerebral hemorrhage in mice via MAPK/NF-κB signaling. Neuroreport 2023; 34:81-92. [PMID: 36608163 DOI: 10.1097/WNR.0000000000001862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The objective is to explore the role of astrocytic transient receptor potential ankyrin 1 (TRPA1) in glial phenotype transformation in neuroinflammation after intracerebral hemorrhage (ICH). Wild-type astrocytes and TRPA1-/- astrocytes were subjected to 6-h hemin treatment, and the calcium ions and transcriptome sequencing were assessed. A mouse autologous blood injection ICH model was established to evaluate the proliferation and phenotypes of astrocytes and microglia around the hematoma. The neuroinflammation and behavioral performance of wild-type ICH mice and TRPA1-/- ICH mice were assessed. Knockout of astrocytic TRPA1 decreased calcium ions of astrocytes after hemin treatment in-vitro, and microglial and astrocytes around the hematoma proliferated after the ICH model. Furthermore, RNA-sequencing (RNA-seq), immunofluorescence, and Western blotting results showed that the activated astrocytes transformed into the A2 phenotype in TRPA1-/- ICH mice. The 'ameboid' microglia were observed around the hematoma in TRPA1-/- ICH mice. The proliferation of A2 astrocytes and 'ameboid' microglia ameliorated the neuroinflammation after ICH. The inflammatory response was reduced by inhibiting the mitogen-activated protein kinase/nuclear factor kappa-B signaling pathway, and neurologic deficits were improved in TRPA1-/- ICH mice compared with wild-type ICH mice. This research suggests that astrocytic TRPA1 is a new therapeutic target to rescue neuroinflammation by modulating the glial phenotype after ICH.
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Al-Omari A, Kecskés M, Gaszner B, Biró-Sütő T, Fazekas B, Berta G, Kuzma M, Pintér E, Kormos V. Functionally active TRPA1 ion channel is downregulated in peptidergic neurons of the Edinger-Westphal nucleus upon acute alcohol exposure. Front Cell Dev Biol 2023; 10:1046559. [PMID: 36704197 PMCID: PMC9872022 DOI: 10.3389/fcell.2022.1046559] [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] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Accepted: 12/21/2022] [Indexed: 01/12/2023] Open
Abstract
Introduction: The centrally projecting Edinger-Westphal nucleus (EWcp) contributes to the control of alcohol consumption by its urocortin 1 (UCN1) and cocaine- and amphetamine-regulated transcript (CART) co-expressing peptidergic neurons. Our group recently showed that the urocortinergic centrally projecting EWcp is the primary seat of central nervous system transient receptor potential ankyrin 1 (TRPA1) cation channel mRNA expression. Here, we hypothesized that alcohol and its metabolites, that pass through the blood-brain barrier, may influence the function of urocortinergic cells in centrally projecting EWcp by activating TRPA1 ion channels. We aimed to examine the functional activity of TRPA1 in centrally projecting EWcp and its possible role in a mouse model of acute alcohol exposure. Methods: Electrophysiological measurements were performed on acute brain slices of C57BL/6J male mice containing the centrally projecting EWcp to prove the functional activity of TRPA1 using a selective, potent, covalent agonist JT010. Male TRPA1 knockout (KO) and wildtype (WT) mice were compared with each other in the morphological studies upon acute alcohol treatment. In both genotypes, half of the animals was treated intraperitoneally with 1 g/kg 6% ethanol vs. physiological saline-injected controls. Transcardial perfusion was performed 2 h after the treatment. In the centrally projecting EWcp area, FOS immunohistochemistry was performed to assess neuronal activation. TRPA1, CART, and urocortin 1 mRNA expression as well as urocortin 1 and CART peptide content was semi-quantified by RNAscope in situ hybridization combined with immunofluorescence. Results: JT010 activated TRPA1 channels of the urocortinergic cells in acute brain slices. Alcohol treatment resulted in a significant FOS activation in both genotypes. Alcohol decreased the Trpa1 mRNA expression in WT mice. The assessment of urocortin 1 peptide immunoreactivity revealed lower basal urocortin 1 in KO mice compared to WTs. The urocortin 1 peptide content was affected genotype-dependently by alcohol: the peptide content decreased in WTs while it increased in KO mice. Alcohol exposure influenced neither CART and urocortin 1 mRNA expression nor the centrally projecting EWcp/CART peptide content. Conclusion: We proved the presence of functional TRPA1 receptors on urocortin 1 neurons of the centrally projecting EWcp. Decreased Trpa1 mRNA expression upon acute alcohol treatment, associated with reduced neuronal urocortin 1 peptide content suggesting that this cation channel may contribute to the regulation of the urocortin 1 release.
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Affiliation(s)
- Ammar Al-Omari
- Department of Pharmacology and Pharmacotherapy, Centre for Neuroscience, Szentágothai Research Centre, Medical School and Molecular Pharmacology Research Group, University of Pécs, Pécs, Hungary
| | - Miklós Kecskés
- Medical School, Institute of Physiology, University of Pécs, Pécs, Hungary
| | - Balázs Gaszner
- Department of Anatomy, Centre for Neuroscience, Medical School and Research Group for Mood Disorders, University of Pécs, Pécs, Hungary
| | - Tünde Biró-Sütő
- Department of Pharmacology and Pharmacotherapy, Centre for Neuroscience, Szentágothai Research Centre, Medical School and Molecular Pharmacology Research Group, University of Pécs, Pécs, Hungary
| | - Balázs Fazekas
- Department of Pharmacology and Pharmacotherapy, Centre for Neuroscience, Szentágothai Research Centre, Medical School and Molecular Pharmacology Research Group, University of Pécs, Pécs, Hungary
| | - Gergely Berta
- Department of Medical Biology, Medical School, University of Pécs, Pécs, Hungary
| | - Mónika Kuzma
- Department of Forensic Medicine, Medical School, University of Pécs, Pécs, Hungary
| | - Erika Pintér
- Department of Pharmacology and Pharmacotherapy, Centre for Neuroscience, Szentágothai Research Centre, Medical School and Molecular Pharmacology Research Group, University of Pécs, Pécs, Hungary
| | - Viktória Kormos
- Department of Pharmacology and Pharmacotherapy, Centre for Neuroscience, Szentágothai Research Centre, Medical School and Molecular Pharmacology Research Group, University of Pécs, Pécs, Hungary
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Matsumoto K, Kamide M, Uchida K, Takahata M, Shichiri R, Hida Y, Taniguchi Y, Ohishi A, Tominaga M, Nagasawa K, Kato S. Transient Receptor Potential Ankyrin 1 in Taste Nerve Contributes to the Sense of Sweet Taste in Mice. Biol Pharm Bull 2023; 46:939-945. [PMID: 37394645 DOI: 10.1248/bpb.b23-00091] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/04/2023]
Abstract
Transient receptor potential (TRP) channels play a significant role in taste perception. TRP ankyrin 1 (TRPA1) is present in the afferent sensory neurons and is activated by food-derived ingredients, such as Japanese horseradish, cinnamon, and garlic. The present study aimed to investigate the expression of TRPA1 in taste buds, and determine its functional roles in taste perception using TRPA1-deficient mice. In circumvallate papillae, TRPA1 immunoreactivity colocalised with P2X2 receptor-positive taste nerves but not with type II or III taste cell markers. Behavioural studies showed that TRPA1 deficiency significantly reduced sensitivity to sweet and umami tastes, but not to salty, bitter, and sour tastes, compared to that in wild-type animals. Furthermore, administration of the TRPA1 antagonist HC030031 significantly decreased taste preference to sucrose solution compared to that in the vehicle-treated group in the two-bottle preference tests. TRPA1 deficiency did not affect the structure of circumvallate papillae or the expression of type II or III taste cell and taste nerve markers. Adenosine 5'-O-(3-thio)triphosphate evoked inward currents did not differ between P2X2- and P2X2/TRPA1-expressing human embryonic kidney 293T cells. TRPA1-deficient mice had significantly decreased c-fos expression in the nucleus of the solitary tract in the brain stem following sucrose stimulation than wild-type mice. Taken together, the current study suggested that TRPA1 in the taste nerve contributes to the sense of sweet taste in mice.
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Affiliation(s)
- Kenjiro Matsumoto
- Division of Pathological Sciences, Department of Pharmacology and Experimental Therapeutics, Kyoto Pharmaceutical University
| | - Mayu Kamide
- Division of Pathological Sciences, Department of Pharmacology and Experimental Therapeutics, Kyoto Pharmaceutical University
| | - Kunitoshi Uchida
- Graduate School of Integrated Pharmaceutical and Nutritional Sciences, University of Shizuoka
- Laboratory of Functional Physiology, Department of Environmental and Life Sciences, School of Food and Nutritional Sciences, University of Shizuoka
| | - Mitsuki Takahata
- Division of Pathological Sciences, Department of Pharmacology and Experimental Therapeutics, Kyoto Pharmaceutical University
| | - Runa Shichiri
- Division of Pathological Sciences, Department of Pharmacology and Experimental Therapeutics, Kyoto Pharmaceutical University
| | - Yuka Hida
- Division of Pathological Sciences, Department of Pharmacology and Experimental Therapeutics, Kyoto Pharmaceutical University
| | - Yumi Taniguchi
- Division of Pathological Sciences, Department of Pharmacology and Experimental Therapeutics, Kyoto Pharmaceutical University
| | - Akihiro Ohishi
- Division of Biological Sciences, Department of Environmental Biochemistry, Kyoto Pharmaceutical University
| | - Makoto Tominaga
- Division of Cell Signaling, Okazaki Institute for Integrative Bioscience (National Institute for Physiological Sciences)
| | - Kazuki Nagasawa
- Division of Biological Sciences, Department of Environmental Biochemistry, Kyoto Pharmaceutical University
| | - Shinichi Kato
- Division of Pathological Sciences, Department of Pharmacology and Experimental Therapeutics, Kyoto Pharmaceutical University
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11
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Liu Q, Feng L, Han X, Zhang W, Zhang H, Xu L. The TRPA1 Channel Mediates Mechanical Allodynia and Thermal Hyperalgesia in a Rat Bone Cancer Pain Model. Front Pain Res (Lausanne) 2022; 2:638620. [PMID: 35295475 PMCID: PMC8915568 DOI: 10.3389/fpain.2021.638620] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Accepted: 02/22/2021] [Indexed: 11/24/2022]
Abstract
Background: Bone cancer pain (BCP) significantly affects patient quality of life, results in great bodily and emotional pain, and creates difficulties in follow-up treatment and normal life. Transient receptor potential ankyrin 1 (TRPA1) is an essential transduction ion channel related to neuropathic and inflammatory pain. However, the role of TRPA1 in BCP remains poorly understood. This study aimed to explore the relationship between TRPA1 and BCP. Methods: A BCP model was induced by Walker256 cells to the left tibia. The sham group was induced by normal saline to the left tibia. Thereafter, pain behaviors and TRPA1 expression between the BCP group and the sham group were observed on the 14th day of modeling. The TRPA1 antagonist A967079 (10 mg/kg) was injected via tail vein. TRPA1 antisense oligodeoxynucleotide (AS-ODN, 5 nmol/10 μl) and missense oligodeoxynucleotide (MS-ODN, 5 nmol/10 μl) were intrathecally delivered via a mini-osmotic pump for 5 consecutive days to assess the effect of TRPA1 on BCP. Behavioral tests were assessed preoperatively and postoperatively. Real-time quantitative PCR and western blot analyses were used to measure TRPA1 levels among the different groups. Results: The BCP model was successfully established via X-ray and pathological sections at 14 days. Compared to the sham group, the BCP group was more sensitive to mechanical stimuli, cool stimuli and hot stimuli. Intravenously injected A967079 can relieve paw mechanical withdrawal threshold and paw withdrawal thermal latency in rats with BCP. Moreover, AS-ODN can relieve paw mechanical withdrawal threshold and paw withdrawal thermal latency in rats with BCP. Additionally, relative mRNA and protein expression of TRPA1 in the BCP group were much higher than those in the sham group (14.55 ± 1.97 vs. 1 ± 0.04, P < 0.01). Compared to the BCP group, the relative mRNA and protein expression of TRPA1 in the BCP+AS-ODN group was reduced (14.55 ± 1.97 vs. 2.59 ± 0.34, P < 0.01). Conclusions: The TRPA1 channel mediates mechanical allodynia and thermal hyperalgesia in a rat BCP model.
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Affiliation(s)
- Qiangwei Liu
- Department of Anesthesiology and Operation, The First Medical Center of Chinese PLA General Hospital, Beijing, China
| | - Long Feng
- Department of Anesthesiology, Hainan Hospital of Chinese PLA General Hospital, Sanya, China
| | - Xiujing Han
- Clinical Laboratory, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Weidong Zhang
- Department of Anesthesiology, The Fifth Medical Center of Chinese PLA General Hospital, Beijing, China
| | - Hong Zhang
- Department of Anesthesiology and Operation, The First Medical Center of Chinese PLA General Hospital, Beijing, China
| | - Longhe Xu
- Department of Anesthesiology, The Third Medical Center of Chinese PLA General Hospital, Beijing, China
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12
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Nie L, Jiang L, Quinn JP, Grubb BD, Wang M. TRPA1-Mediated Src Family Kinases Activity Facilitates Cortical Spreading Depression Susceptibility and Trigeminovascular System Sensitization. Int J Mol Sci 2021; 22:12273. [PMID: 34830154 PMCID: PMC8620265 DOI: 10.3390/ijms222212273] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 11/06/2021] [Accepted: 11/06/2021] [Indexed: 01/09/2023] Open
Abstract
Transient receptor potential ankyrin 1 (TRPA1) plays a role in migraine and is proposed as a promising target for migraine therapy. However, TRPA1-induced signaling in migraine pathogenesis is poorly understood. In this study, we explored the hypothesis that Src family kinases (SFKs) transmit TRPA1 signaling in regulating cortical spreading depression (CSD), calcitonin gene-related peptide (CGRP) release and neuroinflammation. CSD was monitored in mouse brain slices via intrinsic optical imaging, and in rats using electrophysiology. CGRP level and IL-1β gene expression in mouse trigeminal ganglia (TG) was detected using Enzyme-linked Immunosorbent Assay and Quantitative Polymerase Chain Reaction respectively. The results showed a SFKs activator, pYEEI (EPQY(PO3H2)EEEIPIYL), reversed the reduced cortical susceptibility to CSD by an anti-TRPA1 antibody in mouse brain slices. Additionally, the increased cytosolic phosphorylated SFKs at Y416 induced by CSD in rat ipsilateral cerebral cortices was attenuated by pretreatment of the anti-TRPA1 antibody perfused into contralateral ventricles. In mouse TG, a SFKs inhibitor, saracatinib, restored the CGRP release and IL-1β mRNA level increased by a TRPA1 activator, umbellulone. Moreover, umbellulone promoted SFKs phosphorylation, which was reduced by a PKA inhibitor, PKI (14-22) Amide. These data reveal a novel mechanism of migraine pathogenesis by which TRPA1 transmits signaling to SFKs via PKA facilitating CSD susceptibility and trigeminovascular system sensitization.
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Affiliation(s)
- Lingdi Nie
- Centre for Neuroscience, Department of Biological Sciences, Xi’an Jiaotong-Liverpool University (XJTLU), Suzhou 215123, China; (L.N.); (L.J.)
- Department of Pharmacology and Therapeutics, Institute of Systems, Molecular and Integrative Biology, Liverpool L69 7ZB, UK; (J.P.Q.); (B.D.G.)
| | - Liwen Jiang
- Centre for Neuroscience, Department of Biological Sciences, Xi’an Jiaotong-Liverpool University (XJTLU), Suzhou 215123, China; (L.N.); (L.J.)
- Department of Pharmacology and Therapeutics, Institute of Systems, Molecular and Integrative Biology, Liverpool L69 7ZB, UK; (J.P.Q.); (B.D.G.)
| | - John P. Quinn
- Department of Pharmacology and Therapeutics, Institute of Systems, Molecular and Integrative Biology, Liverpool L69 7ZB, UK; (J.P.Q.); (B.D.G.)
| | - Blair D. Grubb
- Department of Pharmacology and Therapeutics, Institute of Systems, Molecular and Integrative Biology, Liverpool L69 7ZB, UK; (J.P.Q.); (B.D.G.)
| | - Minyan Wang
- Centre for Neuroscience, Department of Biological Sciences, Xi’an Jiaotong-Liverpool University (XJTLU), Suzhou 215123, China; (L.N.); (L.J.)
- Department of Pharmacology and Therapeutics, Institute of Systems, Molecular and Integrative Biology, Liverpool L69 7ZB, UK; (J.P.Q.); (B.D.G.)
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13
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Genevois AL, Ruel J, Penalba V, Hatton S, Petitfils C, Ducrocq M, Principe P, Dietrich G, Greco C, Delmas P. Analgesic Effects of Topical Amitriptyline in Patients With Chemotherapy-Induced Peripheral Neuropathy: Mechanistic Insights From Studies in Mice. J Pain 2021; 22:440-53. [PMID: 33227509 DOI: 10.1016/j.jpain.2020.11.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 10/15/2020] [Accepted: 11/03/2020] [Indexed: 12/25/2022]
Abstract
Oral amitriptyline hydrochloride (amitriptyline) is ineffective against some forms of chronic pain and is often associated with dose-limiting adverse events. We evaluated the potential effectiveness of high-dose topical amitriptyline in a preliminary case series of chemotherapy-induced peripheral neuropathy patients and investigated whether local or systemic adverse events associated with the use of amitriptyline were present in these patients. We also investigated the mechanism of action of topically administered amitriptyline in mice. Our case series suggested that topical 10% amitriptyline treatment was associated with pain relief in chemotherapy-induced peripheral neuropathy patients, without the side effects associated with systemic absorption. Topical amitriptyline significantly increased mechanical withdrawal thresholds when applied to the hind paw of mice, and inhibited the firing responses of C-, Aβ- and Aδ-type peripheral nerve fibers in ex vivo skin-saphenous nerve preparations. Whole-cell patch-clamp recordings on cultured sensory neurons revealed that amitriptyline was a potent inhibitor of the main voltage-gated sodium channels (Nav1.7, Nav1.8, and Nav1.9) found in nociceptors. Calcium imaging showed that amitriptyline activated the transient receptor potential cation channel, TRPA1. Our case series indicated that high-dose 10% topical amitriptyline could alleviate neuropathic pain without adverse local or systemic effects. This analgesic action appeared to be mediated through local inhibition of voltage-gated sodium channels. PERSPECTIVE: Our preliminary case series suggested that topical amitriptyline could provide effective pain relief for chemotherapy-induced peripheral neuropathy patients without any systemic or local adverse events. Investigation of the mechanism of this analgesic action in mice revealed that this activity was mediated through local inhibition of nociceptor Nav channels.
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14
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Barvikova K, Barvik I, Sinica V, Zimova L, Vlachova V. Phospho-Mimetic Mutation at Ser602 Inactivates Human TRPA1 Channel. Int J Mol Sci 2020; 21:E7995. [PMID: 33121177 DOI: 10.3390/ijms21217995] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 10/19/2020] [Accepted: 10/26/2020] [Indexed: 11/17/2022] Open
Abstract
The Transient Receptor Potential Ankyrin 1 (TRPA1) channel is an integrative molecular sensor for detecting environmental irritant compounds, endogenous proalgesic and inflammatory agents, pressure, and temperature. Different post-translational modifications participate in the discrimination of the essential functions of TRPA1 in its physiological environment, but the underlying structural bases are poorly understood. Here, we explored the role of the cytosolic N-terminal residue Ser602 located near a functionally important allosteric coupling domain as a potential target of phosphorylation. The phosphomimetic mutation S602D completely abrogated channel activation, whereas the phosphonull mutations S602G and S602N produced a fully functional channel. Using mutagenesis, electrophysiology, and molecular simulations, we investigated the possible structural impact of a modification (mutation or phosphorylation) of Ser602 and found that this residue represents an important regulatory site through which the intracellular signaling cascades may act to reversibly restrict or “dampen” the conformational space of the TRPA1 channel and promote its transitions to the closed state.
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15
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Dong R, Zhang T, Wei W, Zhang M, Chen Q, Xu X, Yu L, Qiu Z. A Cold Environment Aggravates Cough Hyperreactivity in Guinea Pigs With Cough by Activating the TRPA1 Signaling Pathway in Skin. Front Physiol 2020; 11:833. [PMID: 32982765 PMCID: PMC7481366 DOI: 10.3389/fphys.2020.00833] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Accepted: 06/22/2020] [Indexed: 12/23/2022] Open
Abstract
Cough exacerbation in cold environments is a characteristic feature of patients with chronic cough. There is consensus that inhalation of cold air stimulates cough receptors but this idea is not consistent with the fact that cold air is usually unable to directly enter the lower airway. To elucidate the effects of cold environments and transient receptor potential ankyrin 1 (TRPA1) on cough, we compared cough reactivity, airway inflammation, and TRPA1 expression in guinea pigs with chronic cough induced by the repeated inhalation of citric acid for 15 days. The guinea pigs were exposed to cold environments for three consecutive days from day 13 to 15. Repeated inhalation of citric acid increased cough reactivity to inhaled cinnamaldehyde. We found that exposure to cold environments further aggravated cough hyperreactivity in guinea pigs with chronic cough, but not in normal guinea pigs. Cough hyperreactivity was promoted when the whole body and trunk-limbs, but not the heads, of the guinea pigs were exposed to cold environments, and abolished by pretreating the skin through immersion in the TRPA1 antagonist, HC-030031. Substance P levels in bronchoalveolar lavage fluid, and TRPA1 expression in the trachea and skin, were increased in guinea pigs when the whole body and trunk-limbs, rather than the head, were exposed to cold environments. However, this trend was also abolished by pretreatment of the skin via immersion in HC-030031. Similar changes in TRPA1 expression were also detected in the sensory fibers of the trachea and skin, as identified by immunofluorescence and laser-scanning confocal microscopy analysis. These results suggest that exaggerated cough hyperreactivity induced by cold environments may be related to activation of the cold-sensing TRPA1 signaling pathway in the skin, rather than the inhalation of cold air.
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Affiliation(s)
- Ran Dong
- Department of Pulmonary and Critical Care Medicine, Tongji Hospital, Tongji University School of Medicine, Shanghai, China
| | - Tongyangzi Zhang
- Department of Pulmonary and Critical Care Medicine, Tongji Hospital, Tongji University School of Medicine, Shanghai, China
| | - Weili Wei
- Department of Pulmonary and Critical Care Medicine, Tongji Hospital, Tongji University School of Medicine, Shanghai, China
| | - Mengru Zhang
- Department of Pulmonary and Critical Care Medicine, Tongji Hospital, Tongji University School of Medicine, Shanghai, China
| | - Qiang Chen
- Department of Pulmonary and Critical Care Medicine, Tongji Hospital, Tongji University School of Medicine, Shanghai, China
| | - Xianghuai Xu
- Department of Pulmonary and Critical Care Medicine, Tongji Hospital, Tongji University School of Medicine, Shanghai, China
| | - Li Yu
- Department of Pulmonary and Critical Care Medicine, Tongji Hospital, Tongji University School of Medicine, Shanghai, China
| | - Zhongmin Qiu
- Department of Pulmonary and Critical Care Medicine, Tongji Hospital, Tongji University School of Medicine, Shanghai, China
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16
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Liu J, Que K, Liu Y, Zang C, Wen J. Tumor Necrosis Factor-α Regulates the TRPA1 Expression in Human Odontoblast-Like Cells. J Pain Res 2020; 13:1655-1664. [PMID: 32753941 PMCID: PMC7352379 DOI: 10.2147/jpr.s255288] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Accepted: 06/19/2020] [Indexed: 11/23/2022] Open
Abstract
Purpose Transient receptor potential cation channel, subfamily A, member 1 (TRPA1) is a promiscuous chemical nociceptor involved in the perception of cold hypersensitivity, mechanical hyperalgesia and inflammatory pain in human odontoblasts (HODs). Here, we aimed to study the underlying mechanism in which inflammatory cytokine tumor necrosis factor (TNF)-α regulated the expression of TRPA1 channel at both cellular and subcellular levels. Materials and Methods Immunohistochemistry was used to confirm the expression of TRPA1 channel in HODs. Dental pulp cells were induced and differentiated to HOD-like cells and used in succedent experiments. Real-time quantitative polymerase chain reaction assay and Western blotting were used to examine the expression changes of TRPA1 channel with the presence and absence of TNF-α and TNF receptor (TNFR) inhibitor, R 7050. Finally, immunoelectron microscopy (IEM) and quantitative analysis were performed to directly display the TNF-α-regulated distribution change of TRPA1 channel in HOD-like cells. Results TRPA1 channel was positively expressed in the cell bodies and processes of HODs. The expression TRPA1 channel was significantly up-regulated by high concentration of TNF-α, which could be suppressed by R 7050. Under IEM, TNF-α treatment could increase the expression of TRPA1 in the ER membrane, cytoplasm and mitochondria. Conclusion Our study demonstrated that TRPA1 expression in HOD-like cells was evidently upregulated by TNF-α, presumably via TNFR1. TNF-α induced significant increasement in the intracellular distributions of TRPA1 proteins, with increases in the cytoplasm, ER membrane, and mitochondria, to actively participate in noxious external stimuli perception and transduction of hyperalgesia.
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Affiliation(s)
- Jie Liu
- Department of Endodontics, College of Stomatology, Tianjin Medical University, Tianjin, People's Republic of China
| | - Kehua Que
- Department of Endodontics, College of Stomatology, Tianjin Medical University, Tianjin, People's Republic of China
| | - Yangqiu Liu
- Department of Endodontics, College of Stomatology, Tianjin Medical University, Tianjin, People's Republic of China
| | - Chengcheng Zang
- Department of Endodontics, College of Stomatology, Tianjin Medical University, Tianjin, People's Republic of China
| | - Jing Wen
- Department of Endodontics, College of Stomatology, Tianjin Medical University, Tianjin, People's Republic of China.,Lotus Dental Clinic, Guangzhou, Guangdong Province, People's Republic of China
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Choi H, Oh C, Hyun J, Yang J, Song MJ, Lee HS, Lee YJ. Triterpene Glycosides Isolated from the Edible Sea Cucumber Bohadschia vitiensis and Their Antagonistic Activity against Transient Receptor Potential Ankyrin 1. J Agric Food Chem 2020; 68:5349-5355. [PMID: 32324385 DOI: 10.1021/acs.jafc.0c00847] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Transient receptor potential ankyrin 1 (TRPA1) is a cation channel that plays a critical role in the occurrence and transmission of pain. By screening 393 marine invertebrate extracts for their antagonistic activity against TRPA1, it was found that the extract of the edible sea cucumber Bohadschia vitiensis had a remarkable potency. Bioassay-guided separation of the extract resulted in the isolation of six triterpene glycosides, including a novel analog. All six isolated compounds exhibited high inhibitory potency against TRPA1 (IC50 values ranging from 0.60 to 3.26 μM), which is comparable to that of a previously developed synthetic antagonist (A-967079). The discovery of TRPA1 antagonists, originated from this edible sea cucumber, opens the door for the elaboration of the valuable triterpene scaffold for the development of novel safe analgesics.
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Affiliation(s)
- Hansol Choi
- Marine Natural Products Chemistry Laboratory, Korea Institute of Ocean Science and Technology, 385 Haeyangro, Busan 49111, Republic of Korea
| | - Chulhong Oh
- Jeju Marine Research Center, Korea Institute of Ocean Science and Technology, 2670 Iljudong-ro, Gujwa-eup, Jeju 63349, Republic of Korea
| | - JeongMi Hyun
- Gyeonggido Business and Science Accelerator, 107 Gwanggyoro, Suwon 16229, Republic of Korea
| | - Jeungeun Yang
- Gyeonggido Business and Science Accelerator, 107 Gwanggyoro, Suwon 16229, Republic of Korea
| | - Myung Jin Song
- Gyeonggido Business and Science Accelerator, 107 Gwanggyoro, Suwon 16229, Republic of Korea
| | - Hyi-Seung Lee
- Marine Natural Products Chemistry Laboratory, Korea Institute of Ocean Science and Technology, 385 Haeyangro, Busan 49111, Republic of Korea
| | - Yeon-Ju Lee
- Marine Natural Products Chemistry Laboratory, Korea Institute of Ocean Science and Technology, 385 Haeyangro, Busan 49111, Republic of Korea
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Abstract
Dysesthesia is an unpleasant abnormal sensation, often accompanied by pain, paresthesia (abnormal sensation), and numbness (decrease or loss of sensation). Dysesthesia has been associated with various conditions, although its underlying mechanisms are largely unknown. This study assessed the roles of transient receptor potential ankyrin 1 (TRPA1) in dysesthesia by utilizing three animal models of dysesthesia characterized by reductions in blood flow to the skin: a transient hindlimb ischemia/reperfusion model, characterized by spontaneous licking and tactile hypoesthesia of the ischemic hindpaw; a streptozotocin-induced diabetic neuropathy model in mice, characterized by cold hypersensitivity, which is likely parallel to the reduced skin blood flow of the hindpaw; and a hindlimb ischemia model. TRPA1 inhibition or deficiency blocked spontaneous licking in the transient hindlimb ischemia/reperfusion model and cold hypersensitivity in the diabetic mouse model mice. Consistent with these results, the nocifensive behaviors induced by intraplantar injection of a TRPA1 agonist were enhanced in the diabetic neuropathy and hindlimb ischemia models. Hypoxia enhanced H2O2-induced TRPA1 responses in human TRPA1-expressing cells and cultured mouse dorsal root ganglion neurons, with this hypoxia-induced TRPA1 sensitization to H2O2 being associated with hypoxia-induced inhibition of the hydroxylation of prolyl hydroxylases. These results suggest that dysesthesia following blood flow reduction is caused by the activation of TRPA1 sensitized by hypoxia and that hypoxia-induced TRPA1 sensitization plays a pivotal role in painful dysesthesia induced by peripheral blood flow reduction.
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Affiliation(s)
- Kanako So
- Department of Molecular Pharmacology, Graduate School of Pharmaceutical Sciences, Kyoto University
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Dux M, Rosta J, Messlinger K. TRP Channels in the Focus of Trigeminal Nociceptor Sensitization Contributing to Primary Headaches. Int J Mol Sci 2020; 21:ijms21010342. [PMID: 31948011 PMCID: PMC6981722 DOI: 10.3390/ijms21010342] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Revised: 12/31/2019] [Accepted: 01/02/2020] [Indexed: 12/12/2022] Open
Abstract
Pain in trigeminal areas is driven by nociceptive trigeminal afferents. Transduction molecules, among them the nonspecific cation channels transient receptor potential vanilloid 1 (TRPV1) and ankyrin 1 (TRPA1), which are activated by endogenous and exogenous ligands, are expressed by a significant population of trigeminal nociceptors innervating meningeal tissues. Many of these nociceptors also contain vasoactive neuropeptides such as calcitonin gene-related peptide (CGRP) and substance P. Release of neuropeptides and other functional properties are frequently examined using the cell bodies of trigeminal neurons as models of their sensory endings. Pathophysiological conditions cause phosphorylation, increased expression and trafficking of transient receptor potential (TRP) channels, neuropeptides and other mediators, which accelerate activation of nociceptive pathways. Since nociceptor activation may be a significant pathophysiological mechanism involved in both peripheral and central sensitization of the trigeminal nociceptive pathway, its contribution to the pathophysiology of primary headaches is more than likely. Metabolic disorders and medication-induced painful states are frequently associated with TRP receptor activation and may increase the risk for primary headaches.
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Affiliation(s)
- Mária Dux
- Department of Physiology, University of Szeged, Dóm tér 10, H-6720 Szeged, Hungary;
- Correspondence: ; Tel.: +36-62-545-374; Fax: +36-62-545-842
| | - Judit Rosta
- Department of Physiology, University of Szeged, Dóm tér 10, H-6720 Szeged, Hungary;
| | - Karl Messlinger
- Institute of Physiology and Pathophysiology, Friedrich-Alexander-University Erlangen-Nürnberg, Universitätsstr. 17, D-91054 Erlangen, Germany;
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Kriszta G, Nemes B, Sándor Z, Ács P, Komoly S, Berente Z, Bölcskei K, Pintér E. Investigation of Cuprizone-Induced Demyelination in mGFAP-Driven Conditional Transient Receptor Potential Ankyrin 1 (TRPA1) Receptor Knockout Mice. Cells 2019; 9:cells9010081. [PMID: 31905673 PMCID: PMC7017039 DOI: 10.3390/cells9010081] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Revised: 12/19/2019] [Accepted: 12/20/2019] [Indexed: 12/24/2022] Open
Abstract
Transient receptor potential ankyrin 1 (TRPA1) receptors are non-selective cation channels responsive to a variety of exogenous irritants and endogenous stimuli including products of oxidative stress. It is mainly expressed by primary sensory neurons; however, expression of TRPA1 by astrocytes and oligodendrocytes has recently been detected in the mouse brain. Genetic deletion of TRPA1 was shown to attenuate cuprizone-induced oligodendrocyte apoptosis and myelin loss in mice. In the present study we aimed at investigating mGFAP-Cre conditional TRPA1 knockout mice in the cuprizone model. These animals were generated by crossbreeding GFAP-Cre+/− and floxed TRPA1 (TRPA1Fl/Fl) mice. Cuprizone was administered for 6 weeks and demyelination was followed by magnetic resonance imaging (MRI). At the end of the treatment, demyelination and glial activation was also investigated by histological methods. The results of the MRI showed that demyelination was milder at weeks 3 and 4 in both homozygous (GFAP-Cre+/− TRPA1Fl/Fl) and heterozygous (GFAP-Cre+/− TRPA1Fl/−) conditional knockout animals compared to Cre−/− control mice. However, by week 6 of the treatment the difference was not detectable by either MRI or histological methods. In conclusion, TRPA1 receptors on astrocytes may transiently contribute to the demyelination induced by cuprizone, however, expression and function of TRPA1 receptors by other cells in the brain (oligodendrocytes, microglia, neurons) warrant further investigation.
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Affiliation(s)
- Gábor Kriszta
- Department of Pharmacology and Pharmacotherapy, University of Pécs Medical School, Pécs H-7624, Hungary; (G.K.); (B.N.); (Z.S.); (K.B.)
- Molecular Pharmacology Research Group and Center for Neuroscience, János Szentágothai Research Center, University of Pécs, Pécs H-7624, Hungary
- Research Group for Experimental Diagnostic Imaging, University of Pécs Medical School, Pécs H-7624, Hungary;
| | - Balázs Nemes
- Department of Pharmacology and Pharmacotherapy, University of Pécs Medical School, Pécs H-7624, Hungary; (G.K.); (B.N.); (Z.S.); (K.B.)
| | - Zoltán Sándor
- Department of Pharmacology and Pharmacotherapy, University of Pécs Medical School, Pécs H-7624, Hungary; (G.K.); (B.N.); (Z.S.); (K.B.)
| | - Péter Ács
- Department of Neurology, University of Pécs Medical School, Pécs H-7623, Hungary; (P.Á.); (S.K.)
| | - Sámuel Komoly
- Department of Neurology, University of Pécs Medical School, Pécs H-7623, Hungary; (P.Á.); (S.K.)
| | - Zoltán Berente
- Research Group for Experimental Diagnostic Imaging, University of Pécs Medical School, Pécs H-7624, Hungary;
- Department of Biochemistry and Medical Chemistry, University of Pécs Medical School, Pécs H-7624, Hungary
| | - Kata Bölcskei
- Department of Pharmacology and Pharmacotherapy, University of Pécs Medical School, Pécs H-7624, Hungary; (G.K.); (B.N.); (Z.S.); (K.B.)
- Molecular Pharmacology Research Group and Center for Neuroscience, János Szentágothai Research Center, University of Pécs, Pécs H-7624, Hungary
| | - Erika Pintér
- Department of Pharmacology and Pharmacotherapy, University of Pécs Medical School, Pécs H-7624, Hungary; (G.K.); (B.N.); (Z.S.); (K.B.)
- Molecular Pharmacology Research Group and Center for Neuroscience, János Szentágothai Research Center, University of Pécs, Pécs H-7624, Hungary
- Correspondence:
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21
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Abstract
Macrophage-mediated inflammation plays a critical role in hypertensive kidney disease. Here, we investigated the role of transient receptor potential ankyrin 1 (TRPA1), a sensor of inflammation, in angiotensin II (ANG II)-induced renal injury. Subcutaneous infusion of ANG II (600 ng·min-1·kg-1) for 28 days was used to induce hypertension and renal injury in mice. The results showed that ANG II-induced hypertensive mice have decreased renal Trpa1 expression (P < 0.01), whereas ANG II receptor type 1a-deficient hypotensive mice have increased renal Trpa1 expression (P < 0.05) compared with their normotensive counterparts. ANG II induced similar elevations of systolic blood pressure in Trpa1-/- and wild-type (WT) mice but led to higher levels of blood urea nitrogen (P < 0.05), serum creatinine (P < 0.05), and renal fibrosis (P < 0.01) in Trpa1-/- mice than WT mice. Similarly, ANG II increased both CD68+/inducible nitric oxide synthase+ M1 and CD68+/arginase 1+ M2 macrophages in the kidneys of both Trpa1-/- and WT mice (all P < 0.01), with higher extents in Trpa1-/- mice (both P < 0.01). Compared with WT mice, Trpa1-/- mice had significantly increased expression levels of inflammatory cytokines and their receptors in the kidney. Cultured murine macrophages were stimulated with phorbol 12-myristate 13-acetate, which downregulated gene expression of TRPA1 (P < 0.01). A TRPA1 agonist, cinnamaldehyde, significantly inhibited phorbol 12-myristate 13-acetate-stimulated expression of IL-1β and chemokine (C-C motif) ligand 2 in macrophages, which were attenuated by pretreatment with a TRPA1 antagonist, HC030031. Furthermore, activation of TRPA1 with cinnamaldehyde induced apoptosis of macrophages. These findings suggest that TRPA1 may play a protective role in ANG II-induced renal injury, likely through inhibiting macrophage-mediated inflammation.
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Affiliation(s)
- Shuangtao Ma
- Division of Nanomedicine and Molecular Intervention, Department of Medicine, Michigan State University, East Lansing, Michigan
| | - Yan Zhang
- Department of Cardiology, The General Hospital of Western Theater Command, Chengdu, Sichuan, China
| | - Kecheng He
- Department of Cardiology, The General Hospital of Western Theater Command, Chengdu, Sichuan, China
| | - Peijian Wang
- Department of Cardiology, The First Affiliated Hospital, Chengdu Medical College, Chengdu, Sichuan, China
| | - Donna H Wang
- Division of Nanomedicine and Molecular Intervention, Department of Medicine, Michigan State University, East Lansing, Michigan
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22
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Li Puma S, Landini L, Macedo SJ, Seravalli V, Marone IM, Coppi E, Patacchini R, Geppetti P, Materazzi S, Nassini R, De Logu F. TRPA1 mediates the antinociceptive properties of the constituent of Crocus sativus L., safranal. J Cell Mol Med 2019; 23:1976-1986. [PMID: 30636360 PMCID: PMC6378183 DOI: 10.1111/jcmm.14099] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Revised: 11/26/2018] [Accepted: 11/29/2018] [Indexed: 02/02/2023] Open
Abstract
Safranal, contained in Crocus sativus L., exerts anti‐inflammatory and analgesic effects. However, the underlying mechanisms for such effects are poorly understood. We explored whether safranal targets the transient receptor potential ankyrin 1 (TRPA1) channel, which in nociceptors mediates pain signals. Safranal by binding to specific cysteine/lysine residues, stimulates TRPA1, but not the TRP vanilloid 1 and 4 channels (TRPV1 and TRPV4), evoking calcium responses and currents in human cells and rat and mouse dorsal root ganglion (DRG) neurons. Genetic deletion or pharmacological blockade of TRPA1 attenuated safranal‐evoked release of calcitonin gene‐related peptide (CGRP) from rat and mouse dorsal spinal cord, and acute nociception in mice. Safranal contracted rat urinary bladder isolated strips in a TRPA1‐dependent manner, behaving as a partial agonist. After exposure to safranal the ability of allyl isothiocyanate (TRPA1 agonist), but not that of capsaicin (TRPV1 agonist) or GSK1016790A (TRPV4 agonist), to evoke currents in DRG neurons, contraction of urinary bladder strips and CGRP release from spinal cord slices in rats, and acute nociception in mice underwent desensitization. As previously shown for other herbal extracts, including petasites or parthenolide, safranal might exert analgesic properties by partial agonism and selective desensitization of the TRPA1 channel.
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Affiliation(s)
- Simone Li Puma
- Department of Health Sciences, Section of Clinical Pharmacology and Oncology, University of Florence, Florence, Italy
| | - Lorenzo Landini
- Department of Health Sciences, Section of Clinical Pharmacology and Oncology, University of Florence, Florence, Italy
| | - Sergio J Macedo
- Department of Pharmacology, Federal University of Santa Catarina, Florianópolis, Brazil
| | - Viola Seravalli
- Department of Health Sciences, Section of Paediatrics, Midwifery, Gynaecology and Nursing, University of Florence, Florence, Italy
| | - Ilaria M Marone
- Department of Health Sciences, Section of Clinical Pharmacology and Oncology, University of Florence, Florence, Italy
| | - Elisabetta Coppi
- Department of Neuroscience, Psychology, Drug Research and Child Health, Section of Pharmacology and Toxicology, University of Florence, Florence, Italy
| | | | - Pierangelo Geppetti
- Department of Health Sciences, Section of Clinical Pharmacology and Oncology, University of Florence, Florence, Italy
| | - Serena Materazzi
- Department of Health Sciences, Section of Clinical Pharmacology and Oncology, University of Florence, Florence, Italy
| | - Romina Nassini
- Department of Health Sciences, Section of Clinical Pharmacology and Oncology, University of Florence, Florence, Italy
| | - Francesco De Logu
- Department of Health Sciences, Section of Clinical Pharmacology and Oncology, University of Florence, Florence, Italy
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23
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Cun-Jin S, Jian-Hao X, Xu L, Feng-Lun Z, Jie P, Ai-Ming S, Duan-Min H, Yun-Li Y, Tong L, Yu-Song Z. X-ray induces mechanical and heat allodynia in mouse via TRPA1 and TRPV1 activation. Mol Pain 2019; 15:1744806919849201. [PMID: 31012378 PMCID: PMC6509987 DOI: 10.1177/1744806919849201] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Revised: 04/10/2019] [Accepted: 04/15/2019] [Indexed: 12/12/2022] Open
Abstract
Radiotherapy-related pain is a common adverse reaction with a high incidence among cancer patients undergoing radiotherapy and remarkably reduces the quality of life. However, the mechanisms of ionizing radiation-induced pain are largely unknown. In this study, mice were treated with 20 Gy X-ray to establish ionizing radiation-induced pain model. X-ray evoked a prolonged mechanical, heat, and cold allodynia in mice. Transient receptor potential vanilloid 1 and transient receptor potential ankyrin 1 were significantly upregulated in lumbar dorsal root ganglion. The mechanical and heat allodynia could be transiently reverted by intrathecal injection of transient receptor potential vanilloid 1 antagonist capsazepine and transient receptor potential ankyrin 1 antagonist HC-030031. Additionally, the phosphorylated extracellular regulated protein kinases (ERK) and Jun NH2-terminal Kinase (JNK) in pain neural pathway were induced by X-ray treatment. Our findings indicated that activation of transient receptor potential ankyrin 1 and transient receptor potential vanilloid 1 is essential for the development of X-ray-induced allodynia. Furthermore, our findings suggest that targeting on transient receptor potential vanilloid 1 and transient receptor potential ankyrin 1 may be promising prevention strategies for X-ray-induced allodynia in clinical practice.
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Affiliation(s)
- Su Cun-Jin
- Department of Pharmacy, The Second Affiliated Hospital of Soochow University, Suzhou, China
- Institute of Neuroscience, Soochow University, Suzhou, China
| | - Xu Jian-Hao
- Department of Oncology, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Liu Xu
- Institute of Neuroscience, Soochow University, Suzhou, China
| | - Zhao Feng-Lun
- Department of Pharmacy, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Pan Jie
- Department of Pharmacy, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Shi Ai-Ming
- Department of Pharmacy, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Hu Duan-Min
- Department of Gastroenterology, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Yu Yun-Li
- Department of Clinical Pharmacology, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Liu Tong
- Institute of Neuroscience, Soochow University, Suzhou, China
- College of Life Sciences, Yanan University, Yanan, China
| | - Zhang Yu-Song
- Department of Oncology, The Second Affiliated Hospital of Soochow University, Suzhou, China
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24
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Koivisto A, Jalava N, Bratty R, Pertovaara A. TRPA1 Antagonists for Pain Relief. Pharmaceuticals (Basel) 2018; 11:E117. [PMID: 30388732 DOI: 10.3390/ph11040117] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Revised: 10/23/2018] [Accepted: 10/23/2018] [Indexed: 01/02/2023] Open
Abstract
Here, we review the literature assessing the role of transient receptor potential ankyrin 1 (TRPA1), a calcium-permeable non-selective cation channel, in various types of pain conditions. In the nervous system, TRPA1 is expressed in a subpopulation of nociceptive primary sensory neurons, astroglia, oligodendrocytes and Schwann cells. In peripheral terminals of nociceptive primary sensory neurons, it is involved in the transduction of potentially harmful stimuli and in their central terminals it is involved in amplification of nociceptive transmission. TRPA1 is a final common pathway for a large number of chemically diverse pronociceptive agonists generated in various pathophysiological pain conditions. Thereby, pain therapy using TRPA1 antagonists can be expected to be a superior approach when compared with many other drugs targeting single nociceptive signaling pathways. In experimental animal studies, pharmacological or genetic blocking of TRPA1 has effectively attenuated mechanical and cold pain hypersensitivity in various experimental models of pathophysiological pain, with only minor side effects, if any. TRPA1 antagonists acting peripherally are likely to be optimal for attenuating primary hyperalgesia (such as inflammation-induced sensitization of peripheral nerve terminals), while centrally acting TRPA1 antagonists are expected to be optimal for attenuating pain conditions in which central amplification of transmission plays a role (such as secondary hyperalgesia and tactile allodynia caused by various types of peripheral injuries). In an experimental model of peripheral diabetic neuropathy, prolonged blocking of TRPA1 has delayed the loss of nociceptive nerve endings and their function, thereby promising to provide a disease-modifying treatment.
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25
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Matsuoka T, Endo Y, Kurohane K, Imai Y. Skin Sensitization to Fluorescein Isothiocyanate Is Enhanced by Butyl Paraben in a Mouse Model. Biol Pharm Bull 2018; 41:1853-1858. [PMID: 30282852 DOI: 10.1248/bpb.b18-00584] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Contact hypersensitivity (CHS) to preservatives is receiving increased attention. Parabens are widely used in foods, pharmaceutics and cosmetics as preservatives. The skin sensitizing activity of parabens remains controversial but a few investigations have been made as to whether parabens could facilitate sensitization to other chemicals. We have shown that di-n-butyl phthalate (DBP), a phthalate ester, has an adjuvant effect in a fluorescein isothiocyanate (FITC)-induced CHS mouse model. We have also demonstrated that DBP activates transient receptor potential ankyrin 1 (TRPA1) cation channels expressed on sensory neurons. Comparative studies of phthalate esters revealed that TRPA1 agonistic activity and the adjuvant effect on FITC-CHS coincide. Here we focused on two commonly used parabens, butyl paraben (BP) and ethyl paraben (EP), as to their adjuvant effects. BALB/c mice were epicutneously sensitized with FITC in acetone in the presence or absence of a paraben. Sensitization to FITC was evaluated as the ear-swelling response after FITC challenge. BP but not EP enhanced skin sensitization to FITC, but the effect of BP was much weaker than that of DBP. Mechanistically, BP enhanced the trafficking of FITC-presenting CD11c+ dendritic cells (DCs) from the skin to draining lymph nodes as well as cytokine production by draining lymph nodes. When the TRPA1 agonistic activity was measured with a cell line expressing TRPA1, BP exhibited higher activity than EP. The present study provides direct in vivo evidence that BP causes sensitization to other chemicals by means of a mouse FITC-CHS model.
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Affiliation(s)
- Takeshi Matsuoka
- Laboratory of Microbiology and Immunology, School of Pharmaceutical Sciences, University of Shizuoka
| | - Yukina Endo
- Laboratory of Microbiology and Immunology, School of Pharmaceutical Sciences, University of Shizuoka
| | - Kohta Kurohane
- Laboratory of Microbiology and Immunology, School of Pharmaceutical Sciences, University of Shizuoka
| | - Yasuyuki Imai
- Laboratory of Microbiology and Immunology, School of Pharmaceutical Sciences, University of Shizuoka
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26
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Yin S, Wang P, Xing R, Zhao L, Li X, Zhang L, Xiao Y. Transient Receptor Potential Ankyrin 1 (TRPA1) Mediates Lipopolysaccharide (LPS)-Induced Inflammatory Responses in Primary Human Osteoarthritic Fibroblast-Like Synoviocytes. Inflammation 2018; 41:700-709. [PMID: 29318481 DOI: 10.1007/s10753-017-0724-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Transient receptor potential ankyrin 1 (TRPA1) is a membrane-associated cation channel, widely expressed in neuronal and non-neuronal cells. Recently, emerging evidences suggested the crucial role of TRPA1 in the disease progression of osteoarthritis (OA). Therefore, we aimed to investigate whether TRPA1 mediate lipopolysaccharide (LPS)-induced inflammatory responses in primary human OA fibroblast-like synoviocytes (OA-FLS). The expression of TRPA1 in LPS-treated OA-FLS was assessed by polymerase chain reaction (PCR) and western blot (WB), and the functionality of TRPA1 channel by Ca2+ influx measurements. Meanwhile, production of interleukin (IL)-1β, tumor necrosis factor (TNF)-α, IL-6, matrix metalloproteinase (MMP)-1, and MMP-3 in LPS-treated cells was measured by immunoassay. Histological observation after inhibition of TRPA1 was also performed in rats with LPS-induced inflammatory arthritis. After being induced by LPS, the gene and protein expression of TRPA1 was increased in the time-dependent or dose-dependent manner. Meanwhile, Ca2+ influx mediated by TRPA1 in human OA-FLS was also enhanced. In addition, pharmacological inhibition and gene silencing of TRPA1 downregulated the production of IL-1β, TNF-α, IL-6, MMP-1, and MMP-3 in LPS-treated FLS. Finally, synovial inflammation and cartilage degeneration were also reduced by the TRPA1 antagonist. We found the LPS caused the increased functional expression of TRPA1, the activation of which involved in LPS-reduced inflammatory responses in primary human OA-FLS, and the inhibition of TRPA1 produces protective effect in LPS-induced arthritis.
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Affiliation(s)
- Songjiang Yin
- Departments of Orthopedics, The Affiliated Hospital of Nanjing University of TCM, Nanjing, China
| | - Peimin Wang
- Departments of Orthopedics, The Affiliated Hospital of Nanjing University of TCM, Nanjing, China. .,The Affiliated Hospital of Nanjing University of Chinese Medicine, Hanzhong road 155#, Nanjing, Jiangsu province, China.
| | - Runlin Xing
- Departments of Orthopedics, The Affiliated Hospital of Nanjing University of TCM, Nanjing, China
| | - Linrui Zhao
- Departments of Orthopedics, The Affiliated Hospital of Nanjing University of TCM, Nanjing, China
| | - Xiaochen Li
- Departments of Orthopedics, The Affiliated Hospital of Nanjing University of TCM, Nanjing, China
| | - Li Zhang
- Departments of Orthopedics, The Affiliated Hospital of Nanjing University of TCM, Nanjing, China
| | - Yancheng Xiao
- Departments of Orthopedics, The Affiliated Hospital of Nanjing University of TCM, Nanjing, China
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Abstract
Chemotherapy-induced peripheral neuropathy (CIPN), characterized by symptoms of paresthesia, dysesthesia, numbness, and pain, is a common adverse effect of several chemotherapeutic agents, including platinum-based agents, taxanes, and vinca alkaloids. However, no effective prevention or treatment strategies exist for CIPN because the mechanisms underpinning this neuropathy are poorly understood. Recent accumulating evidence suggests that some transient receptor potential (TRP) channels functioning as nociceptors in primary sensory neurons are responsible for CIPN. In this review, we focus on the specific roles of redox-sensitive TRP ankyrin 1 (TRPA1), which was first reported to be a cold nociceptor, in acute cold hypersensitivity induced by oxaliplatin, a platinum-based agent, because it induces a peculiar cold-triggered CIPN during or within hours after its infusion. Oxaliplatin-induced rapid-onset cold hypersensitivity is ameliorated by TRPA1 blockade or deficiency in mice. Consistent with this, oxaliplatin enhances the responsiveness of TRPA1 stimulation, but not of TRP melastatin 8 (TRPM8) and TRP vanilloid 1 (TRPV1), in mice and cultured mouse dorsal root ganglion neurons. These responses are mimicked by an oxaliplatin metabolite, oxalate. In human TRPA1 (hTRPA1)-expressing cells, oxaliplatin or oxalate causes TRPA1 sensitization to reactive oxygen species (ROS) by inhibiting prolyl hydroxylases (PHDs). Inhibition of PHD-mediated hydroxylation of a proline residue within the N-terminal ankyrin repeat of hTRPA1 endows TRPA1 with cold sensitivity by its sensing of cold-evoked ROS. This review discusses these findings and summarizes the evidence demonstrating that oxaliplatin-induced acute cold hypersensitivity is caused by TRPA1 sensitization to ROS via PHD inhibition, which enables TRPA1 to convert ROS signaling into cold sensitivity.
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Affiliation(s)
- Takayuki Nakagawa
- Department of Clinical Pharmacology and Therapeutics, Kyoto University Hospital
| | - Shuji Kaneko
- Department of Molecular Pharmacology, Graduate School of Pharmaceutical Sciences, Kyoto University
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28
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Abstract
Transient receptor potential (TRP) channels play key roles for the transition from acute to chronic postoperative pain after surgery. To evaluate TRP channels in the peripheral blood cells as blood biomarkers for chronic pain, we collected blood samples for genome-wide assays of the mRNA expression and assessed pain intensity and the number of pain symptoms in 13 patients with chronic pain. There was a significant association between increases in the number of pain symptoms and increases in the TRP vanilloid 1 (TRPV1) expression. Decreases in the TRP ankyrin 1 (TRPA1) expression, however, tended to increase the number of pain symptoms. There was likely an inverse relationship for TRPV1 and TRPA1 expressions with regard to the number of pain symptoms in chronic pain patients.
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Affiliation(s)
- Norihiko Sukenaga
- Department of Anesthesiology and Pain Medicine, Hyogo College of Medicine, Hyogo, Japan
| | - Munetaka Hirose
- Department of Anesthesiology and Pain Medicine, Hyogo College of Medicine, Hyogo, Japan
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29
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Bátai IZ, Horváth Á, Pintér E, Helyes Z, Pozsgai G. Role of Transient Receptor Potential Ankyrin 1 Ion Channel and Somatostatin sst4 Receptor in the Antinociceptive and Anti-inflammatory Effects of Sodium Polysulfide and Dimethyl Trisulfide. Front Endocrinol (Lausanne) 2018; 9:55. [PMID: 29535682 PMCID: PMC5835328 DOI: 10.3389/fendo.2018.00055] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Transient receptor potential ankyrin 1 (TRPA1) non-selective ligand-gated cation channels are mostly expressed in primary sensory neurons. Polysulfides (POLYs) are Janus-faced substances interacting with numerous target proteins and associated with both protective and detrimental processes. Activation of TRPA1 in sensory neurons, consequent somatostatin (SOM) liberation and action on sst4 receptors have recently emerged as mediators of the antinociceptive effect of organic trisulfide dimethyl trisulfide (DMTS). In the frame of the present study, we set out to compare the participation of this mechanism in antinociceptive and anti-inflammatory effects of inorganic sodium POLY and DMTS in carrageenan-evoked hind-paw inflammation. Inflammation of murine hind paws was induced by intraplantar injection of carrageenan (3% in 30 µL saline). Animals were treated intraperitoneally with POLY (17 µmol/kg) or DMTS (250 µmol/kg) or their respective vehicles 30 min prior paw challenge and six times afterward every 60 min. Mechanical pain threshold and swelling of the paws were measured by dynamic plantar aesthesiometry and plethysmometry at 2, 4, and 6 h after initiation of inflammation. Myeloperoxidase (MPO) activity in the hind paws were detected 6 h after challenge by luminescent imaging. Mice genetically lacking TRPA1 ion channels, sst4 receptors and their wild-type counterparts were used to examine the participation of these proteins in POLY and DMTS effects. POLY counteracted carrageenan-evoked mechanical hyperalgesia in a TRPA1 and sst4 receptor-dependent manner. POLY did not influence paw swelling and MPO activity. DMTS ameliorated all examined inflammatory parameters. Mitigation of mechanical hyperalgesia and paw swelling by DMTS were mediated through sst4 receptors. These effects were present in TRPA1 knockout animals, too. DMTS inhibited MPO activity with no participation of the sensory neuron-SOM axis. While antinociceptive effects of POLY are transmitted by activation of peptidergic nerves via TRPA1, release of SOM and its effect on sst4 receptors, those of DMTS partially rely on SOM release triggered by other routes. SOM is responsible for the inhibition of paw swelling by DMTS, but TRPA1 does not contribute to its release. Modulation of MPO activity by DMTS is independent of TRPA1 and sst4.
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Affiliation(s)
- István Z. Bátai
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Pécs, Hungary
| | - Ádám Horváth
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Pécs, Hungary
| | - Erika Pintér
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Pécs, Hungary
| | - Zsuzsanna Helyes
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Pécs, Hungary
| | - Gábor Pozsgai
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Pécs, Hungary
- *Correspondence: Gábor Pozsgai,
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30
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Prandini P, De Logu F, Fusi C, Provezza L, Nassini R, Montagner G, Materazzi S, Munari S, Gilioli E, Bezzerri V, Finotti A, Lampronti I, Tamanini A, Dechecchi MC, Lippi G, Ribeiro CM, Rimessi A, Pinton P, Gambari R, Geppetti P, Cabrini G. Transient Receptor Potential Ankyrin 1 Channels Modulate Inflammatory Response in Respiratory Cells from Patients with Cystic Fibrosis. Am J Respir Cell Mol Biol 2017; 55:645-656. [PMID: 27281024 DOI: 10.1165/rcmb.2016-0089oc] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Pseudomonas aeruginosa colonization, prominent inflammation with massive expression of the neutrophil chemokine IL-8, and luminal infiltrates of neutrophils are hallmarks of chronic lung disease in patients with cystic fibrosis (CF). The nociceptive transient receptor potential ankyrin (TRPA) 1 calcium channels have been recently found to be involved in nonneurogenic inflammation. Here, we investigate the role of TRPA1 in CF respiratory inflammatory models in vitro. Expression of TRPA1 was evaluated in CF lung tissue sections and cells by immunohistochemistry and immunofluorescence. Epithelial cell lines (A549, IB3-1, CuFi-1, CFBE41o-) and primary cells from patients with CF were used to: (1) check TRPA1 function modulation, by Fura-2 calcium imaging; (2) down-modulate TRPA1 function and expression, by pharmacological inhibitors (HC-030031 and A-967079) and small interfering RNA silencing; and (3) assess the effect of TRPA1 down-modulation on expression and release of cytokines upon exposure to proinflammatory challenges, by quantitative RT-PCR and 27-protein Bioplex assay. TRPA1 channels are expressed in the CF pseudostratified columnar epithelium facing the bronchial lumina exposed to bacteria, where IL-8 is coexpressed. Inhibition of TRPA1 expression results in a relevant reduction of release of several cytokines, including IL-8 and the proinflammatory cytokines IL-1β and TNF-α, in CF primary bronchial epithelial cells exposed to P. aeruginosa and to the supernatant of mucopurulent material derived from the chronically infected airways of patients with CF. In conclusion, TRPA1 channels are involved in regulating the extent of airway inflammation driven by CF bronchial epithelial cells.
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Affiliation(s)
- Paola Prandini
- 1 Laboratory of Molecular Pathology, Department of Pathology and Diagnostics, University Hospital, Verona, Italy
| | - Francesco De Logu
- 2 Department of Preclinical and Clinical Pharmacology, University of Florence, Florence, Italy
| | - Camilla Fusi
- 2 Department of Preclinical and Clinical Pharmacology, University of Florence, Florence, Italy
| | - Lisa Provezza
- 1 Laboratory of Molecular Pathology, Department of Pathology and Diagnostics, University Hospital, Verona, Italy
| | - Romina Nassini
- 2 Department of Preclinical and Clinical Pharmacology, University of Florence, Florence, Italy
| | - Giulia Montagner
- 3 Department of Life Sciences and Biotechnology, University of Ferrara, Ferrara, Italy
| | - Serena Materazzi
- 2 Department of Preclinical and Clinical Pharmacology, University of Florence, Florence, Italy
| | - Silvia Munari
- 1 Laboratory of Molecular Pathology, Department of Pathology and Diagnostics, University Hospital, Verona, Italy
| | - Eliana Gilioli
- 1 Laboratory of Molecular Pathology, Department of Pathology and Diagnostics, University Hospital, Verona, Italy
| | - Valentino Bezzerri
- 1 Laboratory of Molecular Pathology, Department of Pathology and Diagnostics, University Hospital, Verona, Italy
| | - Alessia Finotti
- 3 Department of Life Sciences and Biotechnology, University of Ferrara, Ferrara, Italy
| | - Ilaria Lampronti
- 3 Department of Life Sciences and Biotechnology, University of Ferrara, Ferrara, Italy
| | - Anna Tamanini
- 1 Laboratory of Molecular Pathology, Department of Pathology and Diagnostics, University Hospital, Verona, Italy
| | - Maria Cristina Dechecchi
- 1 Laboratory of Molecular Pathology, Department of Pathology and Diagnostics, University Hospital, Verona, Italy
| | - Giuseppe Lippi
- 1 Laboratory of Molecular Pathology, Department of Pathology and Diagnostics, University Hospital, Verona, Italy
| | - Carla M Ribeiro
- 4 Departments of Medicine and of Cell Biology and Physiology, Marsico Lung Institute, Cystic Fibrosis Research Center, University of North Carolina, Chapel Hill, North Carolina; and
| | - Alessandro Rimessi
- 5 Department of Morphology, Surgery, and Experimental Medicine, Section of Pathology, Oncology, and Experimental Biology, Laboratory for Technologies of Advanced Therapies, University of Ferrara, Ferrara, Italy
| | - Paolo Pinton
- 5 Department of Morphology, Surgery, and Experimental Medicine, Section of Pathology, Oncology, and Experimental Biology, Laboratory for Technologies of Advanced Therapies, University of Ferrara, Ferrara, Italy
| | - Roberto Gambari
- 3 Department of Life Sciences and Biotechnology, University of Ferrara, Ferrara, Italy
| | - Pierangelo Geppetti
- 2 Department of Preclinical and Clinical Pharmacology, University of Florence, Florence, Italy
| | - Giulio Cabrini
- 1 Laboratory of Molecular Pathology, Department of Pathology and Diagnostics, University Hospital, Verona, Italy
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Yu JW, Huang JH, Lü KL, Zhou MK, Feng X, Tian K, Zhuang JT, Zhou WL, Deng CH, Tu XA. [Expressions of TRPV1 and TRPA1 in the dorsal root ganglion in the rat model of orchialgia]. Zhonghua Nan Ke Xue 2017; 23:296-301. [PMID: 29714412] [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] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
OBJECTIVE To explore the expressions of transient receptor potential vanilloid 1 (TRPV1) and TRP ankyrin 1 (TRPA1) in the dorsal root ganglion (DRG) and their action mechanisms in the rat model of orchialgia. METHODS The models of orchialgia were established in male SD rats by injection of 2% acetic acid into the testis. Then the number of spontaneous pain responses and withdrawal latency in the model rats were recorded by behavioral tests and the expressions of TRPV1 and TRPA1 in T13-L1 DRGs determined by RT-qPCR, Western blot and immunofluorescence staining. RESULTS Compared with the normal control rats, the orchialgia models showed a significant increase in the number of spontaneous pain responses (0.13 ± 0.35 vs 22.63 ± 3.42, P<0.01) and a decrease in the withdrawal latency at 4 hours after injection ([12.75 ± 1.50] vs [4.85 ± 1.00] s, P<0.05). The mRNA expressions of both TRPV1 and TRPA1 were observed in the membrane of the neurons in the DRG, the former increased by 1.77 times and the latter by 1.75 times that of the control (P<0.05). CONCLUSIONS The expressions of TRPV1 and TRPA1 were up-regulated in the DRG of the rat models of orchialgia, which may be involved in the allodynia and hyperalgesia of the rats.
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Affiliation(s)
- Jing-Wei Yu
- Department of Urology and Andrology, The First Hospital Affiliated to Sun Yat-sen University, Guangzhou, Guangdong 510080, China
| | - Jie-Hong Huang
- School of Life Sciences, Sun Yat-sen University, Guangzhou, Guangdong 510275, China
| | - Kun-Long Lü
- Department of Urology and Andrology, The First Hospital Affiliated to Sun Yat-sen University, Guangzhou, Guangdong 510080, China
| | - Ming-Kuan Zhou
- Department of Urology and Andrology, The First Hospital Affiliated to Sun Yat-sen University, Guangzhou, Guangdong 510080, China
| | - Xin Feng
- Department of Urology and Andrology, The First Hospital Affiliated to Sun Yat-sen University, Guangzhou, Guangdong 510080, China
| | - Kun Tian
- Department of Urology and Andrology, The First Hospital Affiliated to Sun Yat-sen University, Guangzhou, Guangdong 510080, China
| | - Jin-Tao Zhuang
- Department of Urology and Andrology, The First Hospital Affiliated to Sun Yat-sen University, Guangzhou, Guangdong 510080, China
| | - Wen-Liang Zhou
- School of Life Sciences, Sun Yat-sen University, Guangzhou, Guangdong 510275, China
| | - Chun-Hua Deng
- Department of Urology and Andrology, The First Hospital Affiliated to Sun Yat-sen University, Guangzhou, Guangdong 510080, China
| | - Xiang-An Tu
- Department of Urology and Andrology, The First Hospital Affiliated to Sun Yat-sen University, Guangzhou, Guangdong 510080, China
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Bohonyi N, Pohóczky K, Szalontai B, Perkecz A, Kovács K, Kajtár B, Orbán L, Varga T, Szegedi S, Bódis J, Helyes Z, Koppán M. Local upregulation of transient receptor potential ankyrin 1 and transient receptor potential vanilloid 1 ion channels in rectosigmoid deep infiltrating endometriosis. Mol Pain 2017; 13:1744806917705564. [PMID: 28478727 PMCID: PMC5424991 DOI: 10.1177/1744806917705564] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2016] [Revised: 03/01/2017] [Accepted: 03/22/2017] [Indexed: 12/21/2022] Open
Abstract
Transient Receptor Potential Vanilloid 1 (TRPV1) and Transient Receptor Potential Ankyrin 1 (TRPA1) expressed mainly by primary sensory neurons function as major nociceptive integrators. They are also present on the rat endometrium in an oestrogen-regulated manner. TRPV1 is upregulated in peritoneal and ovarian endometriosis patients, but there is no information about TRPA1 and their pathophysiological significances. In this study, patients undergoing laparoscopic surgery were investigated: severe dysmenorrhoea due to rectosigmoid deep infiltrating endometriosis ( n = 15), uterine fibroid-induced moderate dysmenorrhoea ( n = 7) and tubal infertility with no pain ( n = 6). TRPA1 and TRPV1 mRNA and protein expressions were determined by quantitative polymerase chain reaction and semi-quantitative immunohistochemistry from the endometrium samples taken by curettage. Results were correlated with the clinical characteristics including pain intensity. TRPA1 and TRPV1 receptors were expressed in the healthy human endometrium at mRNA and protein levels. Sparse, scattered cytoplasmic TRPA1 and TRPV1 immunopositivities were found in the stroma and epithelial layers. We detected upregulated mRNA levels in deep infiltrating endometriosis lesions, and TRPV1 gene expression was also elevated in autocontrol endometrium of deep infiltrating endometriosis patients. Histological scoring revealed significant TRPA1 and TRPV1 difference between deep infiltrating endometriosis stroma and epithelium, and in deep infiltrating endometriosis epithelium compared to control samples. Besides, we measured elevated stromal TRPV1 immunopositivity in deep infiltrating endometriosis. Stromal TRPA1 and TRPV1 immunoreactivities strongly correlated with dysmenorrhoea severity, as well TRPV1 expression on ectopic epithelial cells and macrophages with dyspareunia. Epithelial TRPA1 and stromal TRPV1 immunopositivity also positively correlated with dyschezia severity. We provide the first evidence for the presence of non-neuronal TRPA1 receptor in the healthy human endometrium and confirm the expression of TRPV1 channels. Their upregulations in rectosigmoid deep infiltrating endometriosis lesions and correlations with pain intensity suggest potential roles in pathophysiological mechanisms of the disease.
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Affiliation(s)
- Noémi Bohonyi
- Department of Obstetrics and Gynaecology, University of Pécs Medical School, Pécs, Hungary
| | - Krisztina Pohóczky
- Department of Pharmacology and Pharmacotherapy, University of Pécs Medical School, Pécs, Hungary
- János Szentágothai Research Centre, University of Pécs, Pécs, Hungary
- Center for Neuroscience, Pécs, Hungary
| | - Bálint Szalontai
- Department of Pharmacology and Pharmacotherapy, University of Pécs Medical School, Pécs, Hungary
| | - Anikó Perkecz
- Department of Pharmacology and Pharmacotherapy, University of Pécs Medical School, Pécs, Hungary
| | - Krisztina Kovács
- Department of Pathology, University of Pécs Medical School, Pécs, Hungary
| | - Béla Kajtár
- Department of Pathology, University of Pécs Medical School, Pécs, Hungary
| | - Lajos Orbán
- Department of Surgery, University of Pécs Medical School, Pécs, Hungary
| | - Tamás Varga
- Department of Obstetrics and Gynaecology, University of Pécs Medical School, Pécs, Hungary
| | - Sarolta Szegedi
- Department of Obstetrics and Gynaecology, University of Pécs Medical School, Pécs, Hungary
| | - József Bódis
- Department of Obstetrics and Gynaecology, University of Pécs Medical School, Pécs, Hungary
- MTA-PTE Human Reproduction Scientific Research Group, Pécs, Hungary
| | - Zsuzsanna Helyes
- Department of Pharmacology and Pharmacotherapy, University of Pécs Medical School, Pécs, Hungary
- János Szentágothai Research Centre, University of Pécs, Pécs, Hungary
- Center for Neuroscience, Pécs, Hungary
- MTA-PTE NAP B Pain Research Group, Pécs, Hungary, Pécs, Hungary
| | - Miklós Koppán
- Department of Obstetrics and Gynaecology, University of Pécs Medical School, Pécs, Hungary
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Kun J, Perkecz A, Knie L, Sétáló G, Tornóczki T, Pintér E, Bán Á. TRPA1 receptor is upregulated in human oral lichen planus. Oral Dis 2016; 23:189-198. [PMID: 27718297 DOI: 10.1111/odi.12593] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2016] [Revised: 09/14/2016] [Accepted: 10/04/2016] [Indexed: 12/28/2022]
Abstract
OBJECTIVE Oral lichen planus (OLP) is a chronic inflammatory disease of unknown etiology with antigen-specific and non-specific mechanisms. Transient receptor potential ankyrin 1 (TRPA1) is a non-selective cation channel activated by noxious stimuli such as oxidative stress products evoking pain and release of proinflammatory mediators from sensory nerve endings culminating in neurogenic inflammation. Extraneuronal TRPA1s, for example, on immune cells possess yet unknown functions. SUBJECTS AND METHODS We studied the buccal mRNA expression (qPCR) and protein localization (immunohistochemistry) of TRPA1 receptors and key OLP mediator transcripts in oral mucosa samples of healthy volunteers (n = 9), OLP patients (n = 43), and OLP-like hyperkeratotic patients (n = 12). RESULTS We measured 27.7- and 25.5-fold TRPA1 mRNA increase in OLP and OLP-like hyperkeratotic patients compared to healthy controls. TRPA1 transcripts elevated 2.4-fold in hypertensive OLP but not in hyperkeratotic patients compared to counterparts, reduced by 1.6-fold by angiotensin-convertase inhibitor intake. TRPA1 messenger RNA was more coexpressed with transcripts of tumor necrosis factor α than with interferon γ. Keratinocytes, macrophages but not T cells expressed TRPA1. CONCLUSIONS We provided evidence for the extraneuronal presence and upregulation of the proinflammatory TRPA1 receptor in buccal samples of patients with OLP. This may implicate the ion channel in the pathomechanism of OLP.
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Affiliation(s)
- J Kun
- Department of Pharmacology and Pharmacotherapy, University of Pécs Medical School, Pécs, Hungary.,Molecular Pharmacology Group, Szentágothai Research Center, University of Pecs, Pécs, Hungary.,MTA-PTE NAP B Chronic Pain Research Group, University of Pécs, Pécs, Hungary
| | - A Perkecz
- Department of Pharmacology and Pharmacotherapy, University of Pécs Medical School, Pécs, Hungary
| | - L Knie
- Department of Dentistry, Oral and Maxillofacial Surgery, University of Pécs Medical School, Pécs, Hungary
| | - G Sétáló
- Department of Medical Biology, University of Pécs Medical School, Pécs, Hungary
| | - T Tornóczki
- Oral Pathology Unit, Department of Pathology, University of Pécs Medical School, Hungary
| | - E Pintér
- Department of Pharmacology and Pharmacotherapy, University of Pécs Medical School, Pécs, Hungary.,Molecular Pharmacology Group, Szentágothai Research Center, University of Pecs, Pécs, Hungary
| | - Á Bán
- Department of Dentistry, Oral and Maxillofacial Surgery, University of Pécs Medical School, Pécs, Hungary
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Marics B, Peitl B, Varga A, Pázmándi K, Bácsi A, Németh J, Szilvássy Z, Jancsó G, Dux M. Diet-induced obesity alters dural CGRP release and potentiates TRPA1-mediated trigeminovascular responses. Cephalalgia 2016; 37:581-591. [PMID: 27301459 DOI: 10.1177/0333102416654883] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Background Clinical studies suggest a link between obesity and the primary headache disorder migraine. In our study we aimed to reveal the effect of obesity on meningeal nociceptor function in rats receiving a high-fat, high-sucrose diet. Methods Transient receptor potential ankyrin 1 (TRPA1) receptor activation-induced changes in meningeal blood flow, release of calcitonin gene-related peptide (CGRP) from trigeminal afferents and TRPA1 protein expression in the trigeminal ganglia were measured in control and obese rats. Metabolic parameters of the animals were assessed by measuring glucose and insulin homeostasis as well as plasma cytokine concentrations. Results The present experiments revealed an enhanced basal and TRPA1 receptor agonist-induced CGRP release from meningeal afferents of obese insulin-resistant rats and an attenuated CGRP release to potassium chloride. Obesity was also associated with an augmented vasodilatation in meningeal arteries after dural application of the TRPA1 agonist acrolein, a reduction in TRPA1 protein expression in the trigeminal ganglia and elevations in circulating proinflammatory cytokines IL-1β and IL-6 in addition to increased fasting blood glucose and insulin concentrations. Conclusions Our results suggest trigeminal sensitisation as a mechanism for enhanced headache susceptibility in obese individuals after chemical exposure of trigeminal nociceptors.
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Affiliation(s)
- Balázs Marics
- 1 Department of Pharmacology and Pharmacotherapy, University of Debrecen, Debrecen, Hungary
| | - Barna Peitl
- 1 Department of Pharmacology and Pharmacotherapy, University of Debrecen, Debrecen, Hungary
| | - Angelika Varga
- 2 Department of Physiology, University of Debrecen, Debrecen, Hungary
| | - Kitti Pázmándi
- 3 Department of Immunology, University of Debrecen, Debrecen, Hungary
| | - Attila Bácsi
- 3 Department of Immunology, University of Debrecen, Debrecen, Hungary
| | - József Németh
- 1 Department of Pharmacology and Pharmacotherapy, University of Debrecen, Debrecen, Hungary
| | - Zoltán Szilvássy
- 1 Department of Pharmacology and Pharmacotherapy, University of Debrecen, Debrecen, Hungary
| | - Gábor Jancsó
- 4 Department of Physiology, University of Szeged, Szeged, Hungary
| | - Mária Dux
- 4 Department of Physiology, University of Szeged, Szeged, Hungary
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Kono T, Shimada M, Yamamoto M, Kaneko A, Oomiya Y, Kubota K, Kase Y, Lee K, Uezono Y. Complementary and synergistic therapeutic effects of compounds found in Kampo medicine: analysis of daikenchuto. Front Pharmacol 2015; 6:159. [PMID: 26300774 PMCID: PMC4523940 DOI: 10.3389/fphar.2015.00159] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Accepted: 07/17/2015] [Indexed: 01/17/2023] Open
Abstract
Herbal medicines have been used in Japan for more than 1500 years and traditional Japanese medicines (Kampo medicines) are now fully integrated into the modern healthcare system. In total, 148 Kampo formulae are officially approved as prescription drugs and covered by the national health insurance system in Japan. However, despite their long track record of clinical use, the multi-targeted, multi-component properties of Kampo medicines, which are fundamentally different from Western medicines, have made it difficult to create a suitable framework for conducting well-designed, large-scale clinical trials. In turn, this has led to misconceptions among western trained physicians concerning the paucity of scientific evidence for the beneficial effects of Kampo medicines. Fortunately, there has been a recent surge in scientifically robust data from basic and clinical studies for some of the Kampo medicines, e.g., daikenchuto (TU-100). Numerous basic and clinical studies on TU-100, including placebo-controlled double-blind studies for various gastrointestinal disorders, and absorption, distribution, metabolism and excretion (ADME) studies, have been conducted or are in the process of being conducted in both Japan and the USA. Clinical studies suggest that TU-100 is beneficial for postoperative complications, especially ileus and abdominal bloating. ADME and basic studies indicate that the effect of TU-100 is a composite of numerous actions mediated by multiple compounds supplied via multiple routes. In addition to known mechanisms of action via enteric/sensory nerve stimulation, novel mechanisms via the TRPA1 channel and two pore domain potassium channels have recently been elucidated. TU-100 compounds target these channels with and without absorption, both before and after metabolic activation by enteric flora, with different timings and possibly with synergism.
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Affiliation(s)
- Toru Kono
- Center for Clinical and Biomedical Research, Sapporo Higashi Tokushukai Hospital Sapporo, Hokkaido, Japan ; Pathophysiology and Therapeutics, Faculty of Pharmaceutical Sciences, Hokkaido University Sapporo, Japan ; Department of Surgery, Institute of Health Biosciences, Graduate School of Medicine, Tokushima University Tokushima, Japan
| | - Mitsuo Shimada
- Department of Surgery, Institute of Health Biosciences, Graduate School of Medicine, Tokushima University Tokushima, Japan
| | - Masahiro Yamamoto
- Kampo Scientific Strategies Division, Tsumura Research Laboratories, Tsumura & CO. Ami, Japan
| | - Atushi Kaneko
- Kampo Scientific Strategies Division, Tsumura Research Laboratories, Tsumura & CO. Ami, Japan
| | - Yuji Oomiya
- Kampo Scientific Strategies Division, Tsumura Research Laboratories, Tsumura & CO. Ami, Japan
| | - Kunitsugu Kubota
- Kampo Scientific Strategies Division, Tsumura Research Laboratories, Tsumura & CO. Ami, Japan
| | - Yoshio Kase
- Kampo Scientific Strategies Division, Tsumura Research Laboratories, Tsumura & CO. Ami, Japan
| | - Keiko Lee
- Kampo Scientific Strategies Division, International Pharmaceutical Development Department, Tsumura & CO. Tokyo, Japan
| | - Yasuhito Uezono
- Division of Cancer Pathophysiology, National Cancer Center Research Institute Tokyo, Japan
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Tani M, Yazawa I, Ikeda K, Kawakami K, Onimaru H. Long-lasting facilitation of respiratory rhythm by treatment with TRPA1 agonist, cinnamaldehyde. J Neurophysiol 2015; 114:989-98. [PMID: 26108952 PMCID: PMC4725117 DOI: 10.1152/jn.00282.2015] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [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] [Received: 03/17/2015] [Accepted: 06/11/2015] [Indexed: 11/22/2022] Open
Abstract
The transient receptor potential (TRP) channels are widely distributed in the central nervous system (CNS) and peripheral nervous system. We examined the effects of TRP ankyrin 1 (TRPA1) agonists (cinnamaldehyde and allyl isothiocyanate) on respiratory rhythm generation in brainstem-spinal cord preparations from newborn rats [postnatal days 0-3 (P0-P3)] and in in situ-perfused preparations from juvenile rats (P11-P13). Preparations were superfused with modified Krebs solution at 25-26°C, and activity of inspiratory C4 ventral root (or phrenic nerve) was monitored. In the newborn rat, an in vitro preparation of cinnamaldehyde (0.5 mM) induced typically biphasic responses in C4 rate: an initial short increase and subsequent decrease, then a gradual recovery of rhythm during 15 min of bath application. After washout, the respiratory rhythm rate further increased, remaining 200% of control for >120 min, indicating long-lasting facilitation. Allyl isothiocyanate induced effects similar to those of cinnamaldehyde. The long-lasting facilitation of respiratory rhythm was partially antagonized by the TRPA1 antagonist HC-030031 (10 μM). We obtained similar long-lasting facilitation in an in situ-perfused reparation from P11-P13 rats. On the basis of results from transection experiments of the rostral medulla and whole-cell recordings from preinspiratory neurons in the parafacial respiratory group (pFRG), we suggest that the rostral medulla, including the pFRG, is important to the induction of long-lasting facilitation. A histochemical analysis demonstrated a wide distribution of TRPA1 channel-positive cells in the reticular formation of the medulla, including the pFRG. Our findings suggest that TRPA1 channel activation could induce long-lasting facilitation of respiratory rhythm and provide grounds for future study on the roles of TRPA1 channels in the CNS.
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Affiliation(s)
- Mariho Tani
- Department of Physiology, Showa University School of Medicine, Tokyo, Japan
| | - Itaru Yazawa
- Department of Anatomy, Showa University School of Medicine, Tokyo, Japan
| | - Keiko Ikeda
- Division of Biology, Hyogo College of Medicine, Hyogo, Japan; and
| | - Kiyoshi Kawakami
- Division of Biology, Center for Molecular Medicine, Jichi Medical University, Tochigi, Japan
| | - Hiroshi Onimaru
- Department of Physiology, Showa University School of Medicine, Tokyo, Japan;
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Meng Q, Fang P, Hu Z, Ling Y, Liu H. Mechanotransduction of trigeminal ganglion neurons innervating inner walls of rat anterior eye chambers. Am J Physiol Cell Physiol 2015; 309:C1-10. [PMID: 25904679 DOI: 10.1152/ajpcell.00028.2015] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Accepted: 04/20/2015] [Indexed: 11/22/2022]
Abstract
To address mechanoreceptive roles of trigeminal ganglion (TG) nerve endings in the inner walls of rat anterior eye chambers, we investigated the mechanotransduction process and mechanosensitive (MS) channel on somata of TG neurons innervating this area in vitro. Rat TG neurons innervating inner walls of anterior chambers were labeled by anterior chamber injection of 1,1'-dilinoleyl-3,3,3',3'-tetramethylindocarbocyanine, 4-chlorobenzenesulfonate (FAST DiI). The neuronal cell bodies were voltage clamped using a whole cell patch-clamp technique, while it was deformed by ejection of bath solution to verify mechanotransduction. Immunofluorescence staining was performed on sections of TG ganglia to determine the specific MS channel proteins. Mechanical stimuli induced MS currents in 55 out of 96 FAST DiI-labeled TG neurons. The MS currents exhibited mechanical intensity-dependent and clamp voltage-dependent characteristics. Mechanical stimulation further enhanced the membrane potential and increased the frequency of action potentials. Transient receptor potential ankyrin 1 (TRPA1), TRP vanilloid 4 (TRPV4), acid-sensing ion channel (ASIC) 2 and ASIC3 channel proteins were expressed in FAST DiI-labeled TG neurons. The inhibitory effect of HC-030031, a specific inhibitor of TRPA1, on MS currents demonstrated that TRPA1 was an essential MS channel protein. Taken together, our results show that mechanical stimuli induce MS currents via MS channels such as TRPA1 to trigger mechanotransduction in TG neurons innervating inner walls of anterior chambers. Our results indicate the existence of mechanoreceptive TG nerve endings in inner walls of anterior chambers. Whether the mechanoreceptive TG nerve endings play a role in intraocular pressure sensation warrants further investigation.
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Affiliation(s)
- Qingli Meng
- Department of Ophthalmology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Hubei, China; and
| | - Peng Fang
- Department of Pharmacology, Tongji Medical College, Huazhong University of Science and Technology, Hubei, China
| | - Zhuangli Hu
- Department of Pharmacology, Tongji Medical College, Huazhong University of Science and Technology, Hubei, China
| | - Yun Ling
- Department of Ophthalmology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Hubei, China; and
| | - Haixia Liu
- Department of Ophthalmology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Hubei, China; and
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Hsu CC, Lee LY. Role of calcium ions in the positive interaction between TRPA1 and TRPV1 channels in bronchopulmonary sensory neurons. J Appl Physiol (1985) 2015; 118:1533-43. [PMID: 25858491 DOI: 10.1152/japplphysiol.00043.2015] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2015] [Accepted: 04/05/2015] [Indexed: 12/17/2022] Open
Abstract
Both transient receptor potential ankyrin 1 (TRPA1) and vanilloid 1 (TRPV1) receptors are abundantly expressed in bronchopulmonary C-fiber sensory nerves and can be activated by a number of endogenous inflammatory mediators. A recent study has reported a synergistic effect of simultaneous TRPA1 and TRPV1 activations in vagal pulmonary C-fiber afferents in anesthetized rats, but its underlying mechanism was not known. This study aimed to characterize a possible interaction between these two TRP channels and to investigate the potential role of Ca(2+) as a mediator of this interaction in isolated rat vagal pulmonary sensory neurons. Using the perforated patch-clamp recording technique, our study demonstrated a distinct positive interaction occurring abruptly between TRPA1 and TRPV1 when they were activated simultaneously by their respective agonists, capsaicin (Cap) and allyl isothiocyanate (AITC), at near-threshold concentrations in these neurons. AITC at this low concentration evoked only minimal or undetectable responses, but it markedly amplified the Cap-evoked current in the same neurons. This potentiating effect was eliminated when either AITC or Cap was replaced by non-TRPA1 and non-TRPV1 chemical activators of these neurons, demonstrating the selectivity of the interaction between these two TRP channels. Furthermore, when Ca(2+) was removed from the extracellular solution, the synergistic effect of Cap and AITC on pulmonary sensory neurons was completely abrogated, clearly indicating a critical role of Ca(2+) in mediating the action. These results suggest that this TRPA1-TRPV1 interaction may play a part in regulating the sensitivity of pulmonary sensory neurons during airway inflammatory reaction.
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Affiliation(s)
- Chun-Chun Hsu
- Department of Physiology, University of Kentucky Medical Center, Lexington, Kentucky
| | - Lu-Yuan Lee
- Department of Physiology, University of Kentucky Medical Center, Lexington, Kentucky
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Abstract
While considerable effort has been made to investigate the neural mechanisms of pain, much less effort has been devoted to itch, at least until recently. However, itch is now gaining increasing recognition as a widespread and costly medical and socioeconomic issue. This is accompanied by increasing interest in the underlying neural mechanisms of itch, which has become a vibrant and rapidly-advancing field of research. The goal of the present forefront review is to describe the recent progress that has been made in our understanding of itch mechanisms.
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Affiliation(s)
- Tasuku Akiyama
- University of California, Davis, Department of Neurobiology, Physiology & Behavior, 1 Shields Avenue, Davis, CA 95616, United States
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Wei H, Gong N, Huang JL, Fan H, Ma AN, Li XY, Wang YX, Pertovaara A. Spinal D-amino acid oxidase contributes to mechanical pain hypersensitivity induced by sleep deprivation in the rat. Pharmacol Biochem Behav 2013; 111:30-6. [PMID: 23958579 DOI: 10.1016/j.pbb.2013.08.003] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2013] [Revised: 07/27/2013] [Accepted: 08/08/2013] [Indexed: 11/21/2022]
Abstract
We studied the hypothesis that spinal d-amino acid oxidase (DAAO) that is expressed in astrocytes and that has been reported to promote tonic pain in various pathophysiological conditions plays a role in 'physiological' pain hypersensitivity induced by rapid eye movement sleep deprivation (REMSD). The experiments were performed in healthy rats with a chronic intrathecal (i.t.) catheter. Pain behavior was assessed by determining limb withdrawal response to repetitive stimulation of the hind paw with a calibrated series of monofilaments. REMSD of 48 h duration produced a significant mechanical hypersensitivity. At 48 h of REMSD, the animals were treated i.t. with a DAAO inhibitor or vehicle. Three structurally different DAAO inhibitors were tested in this study: 6-chlorobenzo[d]isoxazol-3-ol (CBIO), sodium benzoate, and 5-methylpyrazole-3-carboxylic acid (AS-057278). CBIO (1-3 μg), sodium benzoate (30-100 μg) and AS-057278 (3-10 μg) produced dose-related antihypersensitivity effects in sleep-deprived animals. In control animals (with no sleep deprivation), the currently used doses of DAAO inhibitors failed to produce significant changes in mechanically evoked pain behavior. The results indicate that among spinal pain facilitatory mechanisms that contribute to the sleep deprivation-induced mechanical pain hypersensitivity is DAAO, presumably due to production of reactive oxygen species, such as hydrogen peroxide, an endogenous agonist of the pronociceptive TRPA1 ion channel.
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O'Neill J, McMahon SB, Undem BJ. Chronic cough and pain: Janus faces in sensory neurobiology? Pulm Pharmacol Ther 2013; 26:476-85. [PMID: 23831712 DOI: 10.1016/j.pupt.2013.06.010] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2013] [Revised: 06/20/2013] [Accepted: 06/26/2013] [Indexed: 10/26/2022]
Abstract
Both chronic cough and chronic pain are critical clinical issues in which a large number of patients remain unsatisfied with available treatments. These conditions have considerable effects on sufferers' quality of life, who often show co-morbidities such as anxiety and depression. There is therefore a pressing need to find new effective therapies. The basic neurobiological mechanisms and pathologies of these two conditions show substantial homologies. However, whilst chronic pain has received a great deal of attention over the last few decades, the same cannot be said for the neurological underpinnings of chronic cough. There is a substantial literature around mechanisms of chronic pain which is likely to be useful in advancing knowledge about the pathologies of chronic cough. Here we compare the basic pain and cough pathways, in addition to the clinical features and possible pathophysiologies of each; including mechanisms of peripheral and central sensitisation which may underlie symptoms such as hyperalgesia and allodynia, and hypertussitvity and allotussivity. Due to the substantial overlap that emerges, it is likely that therapies may be effective over both areas.
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Affiliation(s)
- Jessica O'Neill
- Neuroscience, Physiology and Pharmacology, University College London, UK. Jessica.o'
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Minagawa T, Aizawa N, Igawa Y, Wyndaele JJ. The role of transient receptor potential ankyrin 1 (TRPA1) channel in activation of single unit mechanosensitive bladder afferent activities in the rat. Neurourol Urodyn 2013; 33:544-9. [PMID: 23784920 DOI: 10.1002/nau.22449] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2013] [Accepted: 05/20/2013] [Indexed: 01/18/2023]
Abstract
AIMS We investigated the role of transient receptor potential ankyrin 1 (TRPA1) channel on the single unit mechanosensitive afferent activities (SAAs) primarily originating from the bladder in the rat. METHODS Female Sprague-Dawley rats were used. Cystometry with continuous saline instillation was performed after intra-venous cumulative administration of HC-030031 (HC, a selective TRPA1 antagonist) at three doses (0.1, 1.0, and 10.0 mg/kg) in conscious rats. SAAs primarily originating from the bladder were identified by electrical stimulation of the pelvic nerve and by bladder distention, and divided by conduction velocity as Aδ- or C-fibers under urethane anesthesia. The SAA-investigation was repeated three times with cumulative HC-administration at three doses (0.1, 1.0, and 10.0 mg/kg) or single administration of vehicle. In separate experiments, the SAA-investigation was repeated three times with intra-vesical instillation of allyl isothiocyanate (AI, a TRPA1 agonist, 10 µM) or vehicle with or without pretreatment with HC (1.0 mg/kg, 3 min before each intra-vesical instillation of AI). RESULTS There was no significant change in any cystometric parameters after HC-administrations. A total of 54 SAAs (25 Aδ-fibers and 29 C-fibers) was isolated in 28 rats. SAAs of both fibers significantly decreased after HC-administrations in a dose-dependent manner. SAAs of both fibers significantly increased after AI-instillations. Pretreatment with HC suppressed this excitatory effect of AI-instillation on SAAs. CONCLUSIONS TRPA1 channel has a role in activation of mechanosensitive afferent nerve activities of both Aδ- and C-fibers of the rat bladder, although its role in a physiological condition might be small. Neurourol. Urodynam. 33:544-549, 2014. © 2013 Wiley Periodicals, Inc.
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Affiliation(s)
- Tomonori Minagawa
- Faculty of Medicine, Department of Urology, Antwerp University Hospital and University of Antwerp, Antwerp, Wilrijk, Belgium
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Cattaruzza F, Johnson C, Leggit A, Grady E, Schenk AK, Cevikbas F, Cedron W, Bondada S, Kirkwood R, Malone B, Steinhoff M, Bunnett N, Kirkwood KS. Transient receptor potential ankyrin 1 mediates chronic pancreatitis pain in mice. Am J Physiol Gastrointest Liver Physiol 2013; 304:G1002-12. [PMID: 23558009 PMCID: PMC3680686 DOI: 10.1152/ajpgi.00005.2013] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Chronic pancreatitis (CP) is a devastating disease characterized by persistent and uncontrolled abdominal pain. Our lack of understanding is partially due to the lack of experimental models that mimic the human disease and also to the lack of validated behavioral measures of visceral pain. The ligand-gated cation channel transient receptor potential ankyrin 1 (TRPA1) mediates inflammation and pain in early experimental pancreatitis. It is unknown if TRPA1 causes fibrosis and sustained pancreatic pain. We induced CP by injecting the chemical agent trinitrobenzene sulfonic acid (TNBS), which causes severe acute pancreatitis, into the pancreatic duct of C57BL/6 trpa1(+/+) and trpa1(-/-) mice. Chronic inflammatory changes and pain behaviors were assessed after 2-3 wk. TNBS injection caused marked pancreatic fibrosis with increased collagen-staining intensity, atrophy, fatty replacement, monocyte infiltration, and pancreatic stellate cell activation, and these changes were reflected by increased histological damage scores. TNBS-injected animals showed mechanical hypersensitivity during von Frey filament probing of the abdomen, decreased daily voluntary wheel-running activity, and increased immobility scores during open-field testing. Pancreatic TNBS also reduced the threshold to hindpaw withdrawal to von Frey filament probing, suggesting central sensitization. Inflammatory changes and pain indexes were significantly reduced in trpa1(-/-) mice. In conclusion, we have characterized in mice a model of CP that resembles the human condition, with marked histological changes and behavioral measures of pain. We have demonstrated, using novel and objective pain measurements, that TRPA1 mediates inflammation and visceral hypersensitivity in CP and could be a therapeutic target for the treatment of sustained inflammatory abdominal pain.
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Affiliation(s)
- Fiore Cattaruzza
- 1Department of Surgery, University of California, San Francisco, California;
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- 1Department of Surgery, University of California, San Francisco, California;
| | - Alan Leggit
- 2Department of Neuroscience, University of California, San Francisco, California;
| | - Eileen Grady
- 1Department of Surgery, University of California, San Francisco, California;
| | - A. Katrin Schenk
- 5Department of Physics, Randolph College, Lynchburg, Virginia; and
| | - Ferda Cevikbas
- 3Department of Dermatology, University of California, San Francisco, California;
| | - Wendy Cedron
- 3Department of Dermatology, University of California, San Francisco, California;
| | - Sandhya Bondada
- 1Department of Surgery, University of California, San Francisco, California;
| | - Rebekah Kirkwood
- 1Department of Surgery, University of California, San Francisco, California;
| | - Brian Malone
- 4Department of Otolaryngology-Head and Neck Surgery, University of California, San Francisco, California;
| | - Martin Steinhoff
- 1Department of Surgery, University of California, San Francisco, California; ,3Department of Dermatology, University of California, San Francisco, California;
| | - Nigel Bunnett
- 6Monash Institute of Pharmaceutical Sciences, Parkville, Victoria, Australia
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Nishio N, Taniguchi W, Sugimura YK, Takiguchi N, Yamanaka M, Kiyoyuki Y, Yamada H, Miyazaki N, Yoshida M, Nakatsuka T. Reactive oxygen species enhance excitatory synaptic transmission in rat spinal dorsal horn neurons by activating TRPA1 and TRPV1 channels. Neuroscience 2013; 247:201-12. [PMID: 23707800 DOI: 10.1016/j.neuroscience.2013.05.023] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2013] [Revised: 05/02/2013] [Accepted: 05/14/2013] [Indexed: 12/17/2022]
Abstract
Central neuropathic pain (CNP) in the spinal cord, such as chronic pain after spinal cord injury (SCI), is an incurable ailment. However, little is known about the spinal cord mechanisms underlying CNP. Recently, reactive oxygen species (ROS) have been recognized to play an important role in CNP of the spinal cord. However, it is unclear how ROS affect synaptic transmission in the dorsal horn of the spinal cord. To clarify how ROS impact on synaptic transmission, we investigated the effects of ROS on synaptic transmission in rat spinal cord substantia gelatinosa (SG) neurons using whole-cell patch-clamp recordings. Administration of tert-butyl hydroperoxide (t-BOOH), an ROS donor, into the spinal cord markedly increased the frequency and amplitude of spontaneous excitatory postsynaptic currents (sEPSCs) in SG neurons. This t-BOOH-induced enhancement was not suppressed by the Na(+) channel blocker tetrodotoxin. However, in the presence of a non-N-methyl-D-aspartate glutamate receptor antagonist, 6-cyano-7-nitroquinoxaline-2,3-dione, t-BOOH did not generate any sEPSCs. Furthermore, in the presence of a transient receptor potential ankyrin 1 (TRPA1) channel antagonist (HC-030031) or a transient receptor potential vanilloid 1 (TRPV1) channel antagonist (capsazepine or AMG9810), the t-BOOH-induced increase in the frequency of sEPSCs was inhibited. These results indicate that ROS enhance the spontaneous release of glutamate from presynaptic terminals onto SG neurons through TRPA1 and TRPV1 channel activation. Excessive activation of these ion channels by ROS may induce central sensitization in the spinal cord and result in chronic pain such as that following SCI.
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Affiliation(s)
- N Nishio
- Pain Research Center, Kansai University of Health Sciences, Kumatori, Osaka 590-0482, Japan
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Pflücke D, Hackel D, Mousa SA, Partheil A, Neumann A, Brack A, Rittner HL. The molecular link between C-C-chemokine ligand 2-induced leukocyte recruitment and hyperalgesia. J Pain 2013; 14:897-910. [PMID: 23683582 DOI: 10.1016/j.jpain.2013.02.012] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2012] [Revised: 02/17/2013] [Accepted: 02/26/2013] [Indexed: 12/27/2022]
Abstract
UNLABELLED The chemokine C-C-chemokine ligand 2 (CCL2) (formerly known as MCP, macrophage chemotactic protein) is one of the important genes upregulated in different types of pain both in animals and humans. CCL2 governs the recruitment of C-C chemokine receptor 2-expressing monocytes into inflamed tissue. In contrast to neutrophilic chemokines, intraplantar injection of CCL2 in Wistar rats recruited macrophages and neutrophils and simultaneously lowered nociceptive thresholds. CCL2-induced hyperalgesia was abolished by prior systemic leukocyte depletion by cyclophosphamide and was reconstituted by local adoptive transfer of donor macrophages but not of neutrophils. Antagonists against transient receptor potential vannilloid 1 inhibited thermal and against transient receptor potential ankyrin 1 blocked mechanical hyperalgesia. Peripheral but not central activation of cyclooxygenase-2 (Cox-2) were critical for CCL2-induced hyperalgesia. In vitro CCL2 did not directly stimulate Cox-2 expression or prostaglandin E2 formation but slightly enhanced the formation of reactive oxygen species in monocytes and macrophages. In vivo, increased immunoreactivity for 4-hydroxy-2-nonenal (4-HNE), a downstream product of reactive oxygen species and known inducer of Cox-2, was observed and colocalized with Cox-2 in ED1 (CD68) positive infiltrating cells. No hyperalgesia, 4-HNE, or Cox-2 immunoreactivity was seen in leukocyte-depleted rats that were reconstituted with macrophages in the absence of CCL2, supporting the important role of CCL2. PERSPECTIVE CCL2 plays a dual role: 1) promoting monocyte/macrophage recruitment into tissue; and 2) potentially stimulating macrophages in the tissue to produce 4-HNE and subsequently Cox-2, all resulting in the induction of hyperalgesia via transient receptor potential vannilloid 1 and transient receptor potential ankyrin 1. This encourages pharmacological efforts targeting CCL2/C-C chemokine receptor 2 and macrophages for treatment of inflammatory pain.
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Affiliation(s)
- Diana Pflücke
- Department of Anesthesiology, University Hospital of Würzburg, Würzburg, Germany
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