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Rumbus Z, Fekete K, Kelava L, Gardos B, Klonfar K, Keringer P, Pinter E, Pakai E, Garami A. Ammonium chloride-induced hypothermia is attenuated by transient receptor potential channel vanilloid-1, but augmented by ankyrin-1 in rodents. Life Sci 2024; 346:122633. [PMID: 38615746 DOI: 10.1016/j.lfs.2024.122633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Revised: 03/29/2024] [Accepted: 04/10/2024] [Indexed: 04/16/2024]
Abstract
AIMS Systemic administration of ammonium chloride (NH4Cl), an acidifying agent used in human patients and experimental conditions, causes hypothermia in mice, however, the mechanisms of the thermoregulatory response to NH4Cl and whether it develops in other species remained unknown. MAIN METHODS We studied body temperature (Tb) changes in rats and mice induced by intraperitoneal administration of NH4Cl after blockade of transient receptor potential vanilloid-1 (TRPV1) or ankyrin-1 (TRPA1) channels. KEY FINDINGS In rats, NH4Cl decreased Tb by 0.4-0.8°C (p < 0.05). The NH4Cl-induced hypothermia also developed in Trpv1 knockout (Trpv1-/-) and wild-type (Trpv1+/+) mice, however, the Tb drop was exaggerated in Trpv1-/- mice compared to Trpv1+/+ controls with maximal decreases of 4.0 vs. 2.1°C, respectively (p < 0.05). Pharmacological blockade of TRPV1 channels with AMG 517 augmented the hypothermic response to NH4Cl in genetically unmodified mice and rats (p < 0.05 for both). In contrast, when NH4Cl was infused to mice genetically lacking the TRPA1 channel, the hypothermic response was significantly attenuated compared to wild-type controls with maximal mean Tb difference of 1.0°C between the genotypes (p = 0.008). Pretreatment of rats with a TRPA1 antagonist (A967079) also attenuated the NH4Cl-induced Tb drop with a maximal difference of 0.7°C between the pretreatment groups (p = 0.003). SIGNIFICANCE TRPV1 channels limit, whereas TRPA1 channels exaggerate the development of NH4Cl-induced hypothermia in rats and mice, but other mechanisms are also involved. Our results warrant for regular Tb control and careful consideration of NH4Cl treatment in patients with TRPA1 and TRPV1 channel dysfunctions.
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Affiliation(s)
- Zoltan Rumbus
- Department of Thermophysiology, Institute for Translational Medicine, Medical School, University of Pecs, Pecs H-7624, Hungary
| | - Kata Fekete
- Department of Thermophysiology, Institute for Translational Medicine, Medical School, University of Pecs, Pecs H-7624, Hungary
| | - Leonardo Kelava
- Department of Thermophysiology, Institute for Translational Medicine, Medical School, University of Pecs, Pecs H-7624, Hungary
| | - Bibor Gardos
- Department of Thermophysiology, Institute for Translational Medicine, Medical School, University of Pecs, Pecs H-7624, Hungary
| | - Krisztian Klonfar
- Department of Thermophysiology, Institute for Translational Medicine, Medical School, University of Pecs, Pecs H-7624, Hungary
| | - Patrik Keringer
- Department of Thermophysiology, Institute for Translational Medicine, Medical School, University of Pecs, Pecs H-7624, Hungary
| | - Erika Pinter
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pecs, Pecs H-7624, Hungary
| | - Eszter Pakai
- Department of Thermophysiology, Institute for Translational Medicine, Medical School, University of Pecs, Pecs H-7624, Hungary
| | - Andras Garami
- Department of Thermophysiology, Institute for Translational Medicine, Medical School, University of Pecs, Pecs H-7624, Hungary.
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2
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Lu H, Cao P. Neural Mechanisms Underlying the Coughing Reflex. Neurosci Bull 2023; 39:1823-1839. [PMID: 37606821 PMCID: PMC10661548 DOI: 10.1007/s12264-023-01104-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Accepted: 05/15/2023] [Indexed: 08/23/2023] Open
Abstract
Breathing is an intrinsic natural behavior and physiological process that maintains life. The rhythmic exchange of gases regulates the delicate balance of chemical constituents within an organism throughout its lifespan. However, chronic airway diseases, including asthma and chronic obstructive pulmonary disease, affect millions of people worldwide. Pathological airway conditions can disrupt respiration, causing asphyxia, cardiac arrest, and potential death. The innervation of the respiratory tract and the action of the immune system confer robust airway surveillance and protection against environmental irritants and pathogens. However, aberrant activation of the immune system or sensitization of the nervous system can contribute to the development of autoimmune airway disorders. Transient receptor potential ion channels and voltage-gated Na+ channels play critical roles in sensing noxious stimuli within the respiratory tract and interacting with the immune system to generate neurogenic inflammation and airway hypersensitivity. Although recent studies have revealed the involvement of nociceptor neurons in airway diseases, the further neural circuitry underlying airway protection remains elusive. Unraveling the mechanism underpinning neural circuit regulation in the airway may provide precise therapeutic strategies and valuable insights into the management of airway diseases.
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Affiliation(s)
- Haicheng Lu
- National Institute of Biological Sciences, Beijing, 102206, China.
- School of Life Sciences, Tsinghua University, Beijing, 100084, China.
| | - Peng Cao
- National Institute of Biological Sciences, Beijing, 102206, China
- Tsinghua Institute of Multidisciplinary Biomedical Research, Tsinghua University, Beijing, 102206, China
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3
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Zhang H, Wang C, Zhang K, Kamau PM, Luo A, Tian L, Lai R. The role of TRPA1 channels in thermosensation. CELL INSIGHT 2022; 1:100059. [PMID: 37193355 PMCID: PMC10120293 DOI: 10.1016/j.cellin.2022.100059] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Revised: 10/05/2022] [Accepted: 10/05/2022] [Indexed: 05/18/2023]
Abstract
Transient receptor potential ankyrin 1 (TRPA1) is a polymodal nonselective cation channel sensitive to different physical and chemical stimuli. TRPA1 is associated with many important physiological functions in different species and thus is involved in different degrees of evolution. TRPA1 acts as a polymodal receptor for the perceiving of irritating chemicals, cold, heat, and mechanical sensations in various animal species. Numerous studies have supported many functions of TRPA1, but its temperature-sensing function remains controversial. Although TRPA1 is widely distributed in both invertebrates and vertebrates, and plays a crucial role in tempreture sensing, the role of TRPA1 thermosensation and molecular temperature sensitivity are species-specific. In this review, we summarize the temperature-sensing role of TRPA1 orthologues in terms of molecular, cellular, and behavioural levels.
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Affiliation(s)
- Hao Zhang
- Key Laboratory of Animal Models and Human Disease Mechanisms, Key Laboratory of Bioactive Peptides of Yunnan Province, Engineering Laboratory of Bioactive Peptides, National & Local Joint Engineering Center of Natural Bioactive Peptides, KIZ-CUHK Joint Laboratory of Bioresources and Molecular Research in Common Diseases, National Resource Center for Non-Human Primates, Kunming Primate Research Center, and National Research Facility for Phenotypic & Genetic Analysis of Model Animals (Primate Facility), Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650107, Yunnan, China
| | - Chengsan Wang
- Key Laboratory of Animal Models and Human Disease Mechanisms, Key Laboratory of Bioactive Peptides of Yunnan Province, Engineering Laboratory of Bioactive Peptides, National & Local Joint Engineering Center of Natural Bioactive Peptides, KIZ-CUHK Joint Laboratory of Bioresources and Molecular Research in Common Diseases, National Resource Center for Non-Human Primates, Kunming Primate Research Center, and National Research Facility for Phenotypic & Genetic Analysis of Model Animals (Primate Facility), Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650107, Yunnan, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Keyi Zhang
- University of Chinese Academy of Sciences, Beijing, 100049, China
- School of Molecular Medicine, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, 310000, China
| | - Peter Muiruri Kamau
- Key Laboratory of Animal Models and Human Disease Mechanisms, Key Laboratory of Bioactive Peptides of Yunnan Province, Engineering Laboratory of Bioactive Peptides, National & Local Joint Engineering Center of Natural Bioactive Peptides, KIZ-CUHK Joint Laboratory of Bioresources and Molecular Research in Common Diseases, National Resource Center for Non-Human Primates, Kunming Primate Research Center, and National Research Facility for Phenotypic & Genetic Analysis of Model Animals (Primate Facility), Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650107, Yunnan, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
- Sino-African Joint Research Center, Kunming Institute of Zoology, Chinese, Academy of Sciences, Kunming, Yunnan, 650223, China
| | - Anna Luo
- Key Laboratory of Animal Models and Human Disease Mechanisms, Key Laboratory of Bioactive Peptides of Yunnan Province, Engineering Laboratory of Bioactive Peptides, National & Local Joint Engineering Center of Natural Bioactive Peptides, KIZ-CUHK Joint Laboratory of Bioresources and Molecular Research in Common Diseases, National Resource Center for Non-Human Primates, Kunming Primate Research Center, and National Research Facility for Phenotypic & Genetic Analysis of Model Animals (Primate Facility), Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650107, Yunnan, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Lifeng Tian
- University of Chinese Academy of Sciences, Beijing, 100049, China
- School of Molecular Medicine, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, 310000, China
| | - Ren Lai
- Key Laboratory of Animal Models and Human Disease Mechanisms, Key Laboratory of Bioactive Peptides of Yunnan Province, Engineering Laboratory of Bioactive Peptides, National & Local Joint Engineering Center of Natural Bioactive Peptides, KIZ-CUHK Joint Laboratory of Bioresources and Molecular Research in Common Diseases, National Resource Center for Non-Human Primates, Kunming Primate Research Center, and National Research Facility for Phenotypic & Genetic Analysis of Model Animals (Primate Facility), Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650107, Yunnan, China
- Sino-African Joint Research Center, Kunming Institute of Zoology, Chinese, Academy of Sciences, Kunming, Yunnan, 650223, China
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Kelava L, Ivić I, Pakai E, Fekete K, Maroti P, Told R, Ujfalusi Z, Garami A. Stereolithography 3D Printing of a Heat Exchanger for Advanced Temperature Control in Wire Myography. Polymers (Basel) 2022; 14:polym14030471. [PMID: 35160461 PMCID: PMC8839612 DOI: 10.3390/polym14030471] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 01/16/2022] [Accepted: 01/20/2022] [Indexed: 12/24/2022] Open
Abstract
We report the additive manufacturing of a heat-exchange device that can be used as a cooling accessory in a wire myograph. Wire myography is used for measuring vasomotor responses in small resistance arteries; however, the commercially available devices are not capable of active cooling. Here, we critically evaluated a transparent resin material, in terms of mechanical, structural, and thermal behavior. Tensile strength tests (67.66 ± 1.31 MPa), Charpy impact strength test (20.70 ± 2.30 kJ/m2), and Shore D hardness measurements (83.0 ± 0.47) underlined the mechanical stability of the material, supported by digital microscopy, which revealed a glass-like structure. Differential scanning calorimetry with thermogravimetry analysis and thermal conductivity measurements showed heat stability until ~250 °C and effective heat insulation. The 3D-printed heat exchanger was tested in thermophysiology experiments measuring the vasomotor responses of rat tail arteries at different temperatures (13, 16, and 36 °C). The heat-exchange device was successfully used as an accessory of the wire myograph system to cool down the experimental chambers and steadily maintain the targeted temperatures. We observed temperature-dependent differences in the vasoconstriction induced by phenylephrine and KCl. In conclusion, the transparent resin material can be used in additive manufacturing of heat-exchange devices for biomedical research, such as wire myography. Our animal experiments underline the importance of temperature-dependent physiological mechanisms, which should be further studied to understand the background of the thermal changes and their consequences.
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Affiliation(s)
- Leonardo Kelava
- Department of Thermophysiology, Institute for Translational Medicine, Medical School, University of Pecs, H-7624 Pecs, Hungary
| | - Ivan Ivić
- Department of Thermophysiology, Institute for Translational Medicine, Medical School, University of Pecs, H-7624 Pecs, Hungary
| | - Eszter Pakai
- Department of Thermophysiology, Institute for Translational Medicine, Medical School, University of Pecs, H-7624 Pecs, Hungary
| | - Kata Fekete
- Department of Thermophysiology, Institute for Translational Medicine, Medical School, University of Pecs, H-7624 Pecs, Hungary
| | - Peter Maroti
- Medical Simulation Education Center, Medical School, University of Pecs, H-7624 Pecs, Hungary
- 3D Printing and Visualization Center, University of Pecs, H-7624 Pecs, Hungary
| | - Roland Told
- Medical Simulation Education Center, Medical School, University of Pecs, H-7624 Pecs, Hungary
- 3D Printing and Visualization Center, University of Pecs, H-7624 Pecs, Hungary
| | - Zoltan Ujfalusi
- Department of Biophysics, Medical School, University of Pecs, H-7624 Pecs, Hungary
| | - Andras Garami
- Department of Thermophysiology, Institute for Translational Medicine, Medical School, University of Pecs, H-7624 Pecs, Hungary
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Lezama-García K, Mota-Rojas D, Pereira AMF, Martínez-Burnes J, Ghezzi M, Domínguez A, Gómez J, de Mira Geraldo A, Lendez P, Hernández-Ávalos I, Falcón I, Olmos-Hernández A, Wang D. Transient Receptor Potential (TRP) and Thermoregulation in Animals: Structural Biology and Neurophysiological Aspects. Animals (Basel) 2022; 12:106. [PMID: 35011212 PMCID: PMC8749608 DOI: 10.3390/ani12010106] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2021] [Revised: 12/28/2021] [Accepted: 12/31/2021] [Indexed: 02/07/2023] Open
Abstract
This review presents and analyzes recent scientific findings on the structure, physiology, and neurotransmission mechanisms of transient receptor potential (TRP) and their function in the thermoregulation of mammals. The aim is to better understand the functionality of these receptors and their role in maintaining the temperature of animals, or those susceptible to thermal stress. The majority of peripheral receptors are TRP cation channels formed from transmembrane proteins that function as transductors through changes in the membrane potential. TRP are classified into seven families and two groups. The data gathered for this review include controversial aspects because we do not fully know the mechanisms that operate the opening and closing of the TRP gates. Deductions, however, suggest the intervention of mechanisms related to G protein-coupled receptors, dephosphorylation, and ligands. Several questions emerge from the review as well. For example, the future uses of these data for controlling thermoregulatory disorders and the invitation to researchers to conduct more extensive studies to broaden our understanding of these mechanisms and achieve substantial advances in controlling fever, hyperthermia, and hypothermia.
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Affiliation(s)
- Karina Lezama-García
- PhD Program in Biological and Health Sciences, [Doctorado en Ciencias Biológicas y de la Salud], Universidad Autónoma Metropolitana, Mexico City 04960, Mexico;
| | - Daniel Mota-Rojas
- Department of Agricultural and Animal Production, Universidad Autónoma Metropolitana (UAM), Unidad Xochimilco, Mexico City 04960, Mexico; (A.D.); (J.G.); (I.F.)
| | - Alfredo M. F. Pereira
- Mediterranean Institute for Agriculture, Environment and Development (MED), Institute for Advanced Studies and Research, Universidade de Évora, Pólo da Mitra, Ap. 94, 7006-554 Évora, Portugal; (A.M.F.P.); (A.d.M.G.)
| | - Julio Martínez-Burnes
- Animal Health Group, Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma de Tamaulipas, Victoria City 87000, Mexico;
| | - Marcelo Ghezzi
- Faculty of Veterinary Sciences, Veterinary Research Center (CIVETAN), Universidad Nacional del Centro de la Provincia de Buenos Aires (UNCPBA), CONICET-CICPBA, Arroyo Seco S/N, Tandil 7000, Argentina; (M.G.); (P.L.)
| | - Adriana Domínguez
- Department of Agricultural and Animal Production, Universidad Autónoma Metropolitana (UAM), Unidad Xochimilco, Mexico City 04960, Mexico; (A.D.); (J.G.); (I.F.)
| | - Jocelyn Gómez
- Department of Agricultural and Animal Production, Universidad Autónoma Metropolitana (UAM), Unidad Xochimilco, Mexico City 04960, Mexico; (A.D.); (J.G.); (I.F.)
| | - Ana de Mira Geraldo
- Mediterranean Institute for Agriculture, Environment and Development (MED), Institute for Advanced Studies and Research, Universidade de Évora, Pólo da Mitra, Ap. 94, 7006-554 Évora, Portugal; (A.M.F.P.); (A.d.M.G.)
| | - Pamela Lendez
- Faculty of Veterinary Sciences, Veterinary Research Center (CIVETAN), Universidad Nacional del Centro de la Provincia de Buenos Aires (UNCPBA), CONICET-CICPBA, Arroyo Seco S/N, Tandil 7000, Argentina; (M.G.); (P.L.)
| | - Ismael Hernández-Ávalos
- Facultad de Estudios Superiores Cuautitlán, Universidad Nacional Autónoma de México (UNAM), Cuautitlan Izcalli 54714, Mexico;
| | - Isabel Falcón
- Department of Agricultural and Animal Production, Universidad Autónoma Metropolitana (UAM), Unidad Xochimilco, Mexico City 04960, Mexico; (A.D.); (J.G.); (I.F.)
| | - Adriana Olmos-Hernández
- Division of Biotechnology—Bioterio and Experimental Surgery, Instituto Nacional de Rehabilitación-Luis Guillermo Ibarra Ibarra (INR-LGII), Tlalpan, Mexico City 14389, Mexico;
| | - Dehua Wang
- School of Life Sciences, Shandong University, Qingdao 266237, China;
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Wistrom E, Chase R, Smith PR, Campbell ZT. A compendium of validated pain genes. WIREs Mech Dis 2022; 14:e1570. [PMID: 35760453 PMCID: PMC9787016 DOI: 10.1002/wsbm.1570] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 05/28/2022] [Accepted: 06/06/2022] [Indexed: 12/30/2022]
Abstract
The development of novel pain therapeutics hinges on the identification and rigorous validation of potential targets. Model organisms provide a means to test the involvement of specific genes and regulatory elements in pain. Here we provide a list of genes linked to pain-associated behaviors. We capitalize on results spanning over three decades to identify a set of 242 genes. They support a remarkable diversity of functions spanning action potential propagation, immune response, GPCR signaling, enzymatic catalysis, nucleic acid regulation, and intercellular signaling. Making use of existing tissue and single-cell high-throughput RNA sequencing datasets, we examine their patterns of expression. For each gene class, we discuss archetypal members, with an emphasis on opportunities for additional experimentation. Finally, we discuss how powerful and increasingly ubiquitous forward genetic screening approaches could be used to improve our ability to identify pain genes. This article is categorized under: Neurological Diseases > Genetics/Genomics/Epigenetics Neurological Diseases > Molecular and Cellular Physiology.
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Affiliation(s)
- Eric Wistrom
- Department of Biological SciencesUniversity of Texas at DallasRichardsonTexasUSA
| | - Rebecca Chase
- Department of Biological SciencesUniversity of Texas at DallasRichardsonTexasUSA
| | - Patrick R. Smith
- Department of Biological SciencesUniversity of Texas at DallasRichardsonTexasUSA
| | - Zachary T. Campbell
- Department of Biological SciencesUniversity of Texas at DallasRichardsonTexasUSA,Center for Advanced Pain StudiesUniversity of Texas at DallasRichardsonTexasUSA
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Thapa D, Barrett B, Argunhan F, Brain SD. Influence of Cold-TRP Receptors on Cold-Influenced Behaviour. Pharmaceuticals (Basel) 2021; 15:ph15010042. [PMID: 35056099 PMCID: PMC8781072 DOI: 10.3390/ph15010042] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 12/23/2021] [Accepted: 12/23/2021] [Indexed: 12/14/2022] Open
Abstract
The transient receptor potential (TRP) channels, TRPA1 and TRPM8, are thermo-receptors that detect cold and cool temperatures and play pivotal roles in mediating the cold-induced vascular response. In this study, we investigated the role of TRPA1 and TRPM8 in the thermoregulatory behavioural responses to environmental cold exposure by measuring core body temperature and locomotor activity using a telemetry device that was surgically implanted in mice. The core body temperature of mice that were cooled at 4 °C over 3 h was increased and this was accompanied by an increase in UCP-1 and TRPM8 level as detected by Western blot. We then established an effective route, by which the TRP antagonists could be administered orally with palatable food. This avoids the physical restraint of mice, which is crucial as that could influence the behavioural results. Using selective pharmacological antagonists A967079 and AMTB for TRPA1 and TRPM8 receptors, respectively, we show that TRPM8, but not TRPA1, plays a direct role in thermoregulation response to whole body cold exposure in the mouse. Additionally, we provide evidence of increased TRPM8 levels after cold exposure which could be a protective response to increase core body temperature to counter cold.
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8
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The Hypothermic Effect of Hydrogen Sulfide Is Mediated by the Transient Receptor Potential Ankyrin-1 Channel in Mice. Pharmaceuticals (Basel) 2021; 14:ph14100992. [PMID: 34681216 PMCID: PMC8538668 DOI: 10.3390/ph14100992] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 09/24/2021] [Accepted: 09/25/2021] [Indexed: 12/17/2022] Open
Abstract
Hydrogen sulfide (H2S) has been shown in previous studies to cause hypothermia and hypometabolism in mice, and its thermoregulatory effects were subsequently investigated. However, the molecular target through which H2S triggers its effects on deep body temperature has remained unknown. We investigated the thermoregulatory response to fast-(Na2S) and slow-releasing (GYY4137) H2S donors in C57BL/6 mice, and then tested whether their effects depend on the transient receptor potential ankyrin-1 (TRPA1) channel in Trpa1 knockout (Trpa1−/−) and wild-type (Trpa1+/+) mice. Intracerebroventricular administration of Na2S (0.5–1 mg/kg) caused hypothermia in C57BL/6 mice, which was mediated by cutaneous vasodilation and decreased thermogenesis. In contrast, intraperitoneal administration of Na2S (5 mg/kg) did not cause any thermoregulatory effect. Central administration of GYY4137 (3 mg/kg) also caused hypothermia and hypometabolism. The hypothermic response to both H2S donors was significantly (p < 0.001) attenuated in Trpa1−/− mice compared to their Trpa1+/+ littermates. Trpa1 mRNA transcripts could be detected with RNAscope in hypothalamic and other brain neurons within the autonomic thermoeffector pathways. In conclusion, slow- and fast-releasing H2S donors induce hypothermia through hypometabolism and cutaneous vasodilation in mice that is mediated by TRPA1 channels located in the brain, presumably in hypothalamic neurons within the autonomic thermoeffector pathways.
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9
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de Almeida AS, Bernardes LDB, Trevisan G. TRP channels in cancer pain. Eur J Pharmacol 2021; 904:174185. [PMID: 34015320 DOI: 10.1016/j.ejphar.2021.174185] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Revised: 05/06/2021] [Accepted: 05/12/2021] [Indexed: 01/06/2023]
Abstract
Chronic pain is a common symptom experienced during cancer progression. Additionally, some patients experience bone pain caused by cancer metastasis, which further complicates the prognosis. Cancer pain is often treated using opioid-based pharmacotherapy, but these drugs possess several adverse effects. Accordingly, new mechanisms for cancer pain management are being explored, including transient receptor potential channels (TRPs). TRP ion channels are expressed in several tissues and play a key role in pain detection, especially TRP vanilloid 1 (TRPV1) and TRP ankyrin 1 (TRPA1). In the present review, we describe the role of TRPV1 and TRPA1 involved in cancer pain mechanisms. Several studies have revealed that the administration of TRPV1 or TRPA1 agonists/antagonists and TRPV1 or TRPA1 knockdown reduced sensitivity to nociception in cancer pain models. TRPV1 was also found to be involved in various models of cancer-induced bone pain (CIBP), with TRPV1 expression reportedly enhanced in some models. These studies have demonstrated the TRPV1 or TRPA1 association with cancer pain in models induced by tumour cell inoculation into the bone cavity, hind paw, mammary fat pad, and sciatic nerve in mice or rats. To date, only resiniferatoxin, a TRPV1 agonist, has been evaluated in clinical trials for cancer pain and showed preliminary positive results. Thus, TRP channels are potential targets for managing cancer-related pain syndromes.
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Affiliation(s)
- Amanda Spring de Almeida
- Programa de Pós-Graduação Em Farmacologia, Universidade Federal de Santa Maria (UFSM), 97105-900, Santa Maria, RS, Brazil
| | - Laura de Barros Bernardes
- Programa de Pós-Graduação Em Farmacologia, Universidade Federal de Santa Maria (UFSM), 97105-900, Santa Maria, RS, Brazil
| | - Gabriela Trevisan
- Programa de Pós-Graduação Em Farmacologia, Universidade Federal de Santa Maria (UFSM), 97105-900, Santa Maria, RS, Brazil.
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Thermoregulatory Response to Cold at Various Levels of Activation of Peripheral TRPA1 Ion Channel. Bull Exp Biol Med 2021; 170:420-424. [PMID: 33713225 DOI: 10.1007/s10517-021-05079-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Indexed: 10/21/2022]
Abstract
The effect of TRPA1-ion channel on thermoregulatory responses depending on the level of its activity was studied in Wistar rats. To activate the TRPA1 ion channel localized in the skin, its agonist allyl isothiocyanate (AITC) was used in different concentrations (0.04, 0.4, 1, and 2.5%). Low concentration of AITC (0.04%) enhanced and high concentrations (1 and 2.5%), on the contrary, inhibited cold-defense responses (decreased their magnitude and led to their later initiation due to an increase in temperature thresholds). With an increase in TRPA1 activation, the increase in temperature thresholds (afferent link) was ahead of the decrease in the magnitude of responses (efferent link), which can attest to different sensitivity of these processes to TRPA1 activation.
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Fernández-Carvajal A, González-Muñiz R, Fernández-Ballester G, Ferrer-Montiel A. Investigational drugs in early phase clinical trials targeting thermotransient receptor potential (thermoTRP) channels. Expert Opin Investig Drugs 2020; 29:1209-1222. [PMID: 32941080 DOI: 10.1080/13543784.2020.1825680] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
INTRODUCTION Thermo transient receptor potential (thermoTRP) channels are some of the most intensely pursued therapeutic targets of the past decade. They are considered promising targets of numerous diseases including chronic pain and cancer. Modulators of these proteins, in particular TRPV1-4, TRPM8 and TRPA1, have reached clinical development, but none has been approved for clinical practice yet. AREAS COVERED The therapeutic potential of targeting thermoTRP channels is discussed. The discussion is centered on our experience and on available data found in SciFinder, PubMed, and ClinicalTrials.gov database from the past decade. This review focuses on the therapeutic progress concerning this family of channels, including strategies to improve their therapeutic index for overcoming adverse effects. EXPERT OPINION Although thermoTRPs are pivotal drug targets, translation to the clinic has faced two key problems, (i) unforeseen side effects in Phase I trials and, (ii) poor clinical efficacy in Phase II trials. Thus, there is a need for (i) an enhanced understanding of the physiological role of these channels in tissues and organs and (ii) the development of human-based pre-clinical models with higher clinical translation. Furthermore, progress in nanotechnology-based delivery strategies will positively impact thermoTRP human pharmacology.
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Affiliation(s)
- Asia Fernández-Carvajal
- Instituto De Investigación, Desarrollo E Innovación En Biotecnología Sanitaria De Elche (Idibe), Universitas Miguel Hernández , Alicante, Spain
| | | | - Gregorio Fernández-Ballester
- Instituto De Investigación, Desarrollo E Innovación En Biotecnología Sanitaria De Elche (Idibe), Universitas Miguel Hernández , Alicante, Spain
| | - Antonio Ferrer-Montiel
- Instituto De Investigación, Desarrollo E Innovación En Biotecnología Sanitaria De Elche (Idibe), Universitas Miguel Hernández , Alicante, Spain
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12
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Kozyreva TV, Khramova GM. Effects of activation of skin ion channels TRPM8, TRPV1, and TRPA1 on the immune response. Comparison with effects of cold and heat exposure. J Therm Biol 2020; 93:102729. [PMID: 33077140 DOI: 10.1016/j.jtherbio.2020.102729] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 09/04/2020] [Accepted: 09/10/2020] [Indexed: 10/23/2022]
Abstract
The effects of pharmacological stimulation of skin ion channels TRPA1, TRPM8, TRPV1 on the immune response are presented. These effects are compared with the effects of different types of temperature exposures - skin cooling, deep cooling, and deep heating. This analysis allows us to clear the differences in the influence on the immune response of thermosensitive ion channels localized in the skin; (2) whether the changes in the immune response under temperature exposures are due to these thermosensitive ion channels. Experiments were performed on Wistar rats. For stimulation of TRPM8 ion channel, an application to the skin of 1% menthol was used, for TRPA1 - 0.04% allylisotiocianate, and for TRPV1 - capsaicin in a concentration of 0.001.The antigen binding in the spleen was two-times stimulated by activation of the cold-sensitive ion channel TRPM8 and much weaker by activation of warm-sensitive TRPV1 (by 15%), and another cold-sensitive ion channel TRPA1 (by 40%). Only the stimulation of TRPA1 significantly (by 140%) increased antibody formation in the spleen, while TRPM8 had practically no effect on this process, and activation of TRPV1 significantly (by 60%) inhibited antibody formation. Stimulation of the TRPM8 ion channel significantly (by 60%) reduced the level of IgG in the blood, which is believed to control of infectious diseases.The obtained results show that pharmacological activation of the skin TRPA1, TRPM8, TRPV1 ion channels can differently affect the immune system. At the epicenter of changes there were the antigen binding and antibody formation in the spleen, as well as the level of IgG in the blood. Exactly stimulation of the TRPM8 ion channel determines the changes in the immune response when only the skin is cooling, while at deep body heating, the changes in the immune response are mostly determined by the activation of the skin TRPV1 ion channel.
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Affiliation(s)
- T V Kozyreva
- Institute of Physiology and Basic Medicine, Timakov str. 4, Novosibirsk, 630117, Russia; Novosibirsk State University, Novosibirsk, Pirogov str. 2, Novosibirsk, 630090, Russia.
| | - G M Khramova
- Institute of Physiology and Basic Medicine, Timakov str. 4, Novosibirsk, 630117, Russia
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13
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Bamps D, Vriens J, de Hoon J, Voets T. TRP Channel Cooperation for Nociception: Therapeutic Opportunities. Annu Rev Pharmacol Toxicol 2020; 61:655-677. [PMID: 32976736 DOI: 10.1146/annurev-pharmtox-010919-023238] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Chronic pain treatment remains a sore challenge, and in our aging society, the number of patients reporting inadequate pain relief continues to grow. Current treatment options all have their drawbacks, including limited efficacy and the propensity of abuse and addiction; the latter is exemplified by the ongoing opioid crisis. Extensive research in the last few decades has focused on mechanisms underlying chronic pain states, thereby producing attractive opportunities for novel, effective and safe pharmaceutical interventions. Members of the transient receptor potential (TRP) ion channel family represent innovative targets to tackle pain sensation at the root. Three TRP channels, TRPV1, TRPM3, and TRPA1, are of particular interest, as they were identified as sensors of chemical- and heat-induced pain in nociceptor neurons. This review summarizes the knowledge regarding TRP channel-based pain therapies, including the bumpy road of the clinical development of TRPV1 antagonists, the current status of TRPA1 antagonists, and the future potential of targeting TRPM3.
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Affiliation(s)
- Dorien Bamps
- Center for Clinical Pharmacology, Department of Pharmaceutical and Pharmacological Sciences, KU Leuven, 3000 Leuven, Belgium
| | - Joris Vriens
- Laboratory of Endometrium, Endometriosis and Reproductive Medicine, Department of Development and Regeneration, KU Leuven, 3000 Leuven, Belgium
| | - Jan de Hoon
- Center for Clinical Pharmacology, Department of Pharmaceutical and Pharmacological Sciences, KU Leuven, 3000 Leuven, Belgium
| | - Thomas Voets
- Laboratory of Ion Channel Research, VIB-KU Leuven Center for Brain and Disease Research, 3000 Leuven, Belgium; .,Department of Cellular and Molecular Medicine, KU Leuven, 3000 Leuven, Belgium
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14
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Poulson SJ, Aldarraji A, Arain II, Dziekonski N, Motlana K, Riley R, Holmes MM, Martin LJ. Naked mole-rats lack cold sensitivity before and after nerve injury. Mol Pain 2020; 16:1744806920955103. [PMID: 32880221 PMCID: PMC7475789 DOI: 10.1177/1744806920955103] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Neuropathic pain is a chronic disease state resulting from injury to the nervous system. This type of pain often responds poorly to standard treatments and occasionally may get worse instead of better over time. Patients who experience neuropathic pain report sensitivity to cold and mechanical stimuli. Since the nociceptive system of African naked mole-rats contains unique adaptations that result in insensitivity to some pain types, we investigated whether naked mole-rats may be resilient to sensitivity following nerve injury. Using the spared nerve injury model of neuropathic pain, we showed that sensitivity to mechanical stimuli developed similarly in mice and naked mole-rats. However, naked mole-rats lacked sensitivity to mild cold stimulation after nerve injury, while mice developed robust cold sensitivity. We pursued this response deficit by testing behavior to activators of transient receptor potential (TRP) receptors involved in detecting cold in naïve animals. Following mustard oil, a TRPA1 activator, naked mole-rats responded similarly to mice. Conversely, icilin, a TRPM8 agonist, did not evoke pain behavior in naked mole-rats when compared with mice. Finally, we used RNAscope to probe for TRPA1 and TRPM8 messenger RNA expression in dorsal root ganglia of both species. We found increased TRPA1 messenger RNA, but decreased TRPM8 punctae in naked mole-rats when compared with mice. Our findings likely reflect species differences due to evolutionary environmental responses that are not easily explained by differences in receptor expression between the species.
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Affiliation(s)
- Sandra J Poulson
- Department of Psychology, University of Toronto Mississauga, Mississauga, ON, Canada
| | - Ahmed Aldarraji
- Department of Psychology, University of Toronto Mississauga, Mississauga, ON, Canada
| | - Iqra I Arain
- Department of Psychology, University of Toronto Mississauga, Mississauga, ON, Canada
| | - Natalia Dziekonski
- Department of Psychology, University of Toronto Mississauga, Mississauga, ON, Canada
| | - Keza Motlana
- Department of Psychology, University of Toronto Mississauga, Mississauga, ON, Canada
| | - Rachel Riley
- Department of Psychology, University of Toronto Mississauga, Mississauga, ON, Canada
| | - Melissa M Holmes
- Department of Psychology, University of Toronto Mississauga, Mississauga, ON, Canada.,Department of Cell and Systems Biology, University of Toronto, Toronto, ON, Canada.,Department of Ecology & Evolutionary Biology, University of Toronto, Toronto, ON, Canada
| | - Loren J Martin
- Department of Psychology, University of Toronto Mississauga, Mississauga, ON, Canada.,Department of Cell and Systems Biology, University of Toronto, Toronto, ON, Canada
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15
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Garami A, Shimansky YP, Rumbus Z, Vizin RCL, Farkas N, Hegyi J, Szakacs Z, Solymar M, Csenkey A, Chiche DA, Kapil R, Kyle DJ, Van Horn WD, Hegyi P, Romanovsky AA. Hyperthermia induced by transient receptor potential vanilloid-1 (TRPV1) antagonists in human clinical trials: Insights from mathematical modeling and meta-analysis. Pharmacol Ther 2020; 208:107474. [PMID: 31926897 DOI: 10.1016/j.pharmthera.2020.107474] [Citation(s) in RCA: 79] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Accepted: 12/23/2019] [Indexed: 02/06/2023]
Abstract
Antagonists of the transient receptor potential vanilloid-1 (TRPV1) channel alter body temperature (Tb) in laboratory animals and humans: most cause hyperthermia; some produce hypothermia; and yet others have no effect. TRPV1 can be activated by capsaicin (CAP), protons (low pH), and heat. First-generation (polymodal) TRPV1 antagonists potently block all three TRPV1 activation modes. Second-generation (mode-selective) TRPV1 antagonists potently block channel activation by CAP, but exert different effects (e.g., potentiation, no effect, or low-potency inhibition) in the proton mode, heat mode, or both. Based on our earlier studies in rats, only one mode of TRPV1 activation - by protons - is involved in thermoregulatory responses to TRPV1 antagonists. In rats, compounds that potently block, potentiate, or have no effect on proton activation cause hyperthermia, hypothermia, or no effect on Tb, respectively. A Tb response occurs when a TRPV1 antagonist blocks (in case of hyperthermia) or potentiates (hypothermia) the tonic TRPV1 activation by protons somewhere in the trunk, perhaps in muscles, and - via the acido-antithermogenic and acido-antivasoconstrictor reflexes - modulates thermogenesis and skin vasoconstriction. In this work, we used a mathematical model to analyze Tb data from human clinical trials of TRPV1 antagonists. The analysis suggests that, in humans, the hyperthermic effect depends on the antagonist's potency to block TRPV1 activation not only by protons, but also by heat, while the CAP activation mode is uninvolved. Whereas in rats TRPV1 drives thermoeffectors by mediating pH signals from the trunk, but not Tb signals, our analysis suggests that TRPV1 mediates both pH and thermal signals driving thermoregulation in humans. Hence, in humans (but not in rats), TRPV1 is likely to serve as a thermosensor of the thermoregulation system. We also conducted a meta-analysis of Tb data from human trials and found that polymodal TRPV1 antagonists (ABT-102, AZD1386, and V116517) increase Tb, whereas the mode-selective blocker NEO6860 does not. Several strategies of harnessing the thermoregulatory effects of TRPV1 antagonists in humans are discussed.
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Affiliation(s)
- Andras Garami
- Department of Thermophysiology, Institute for Translational Medicine, Medical School, University of Pecs, Pecs, Hungary.
| | - Yury P Shimansky
- Department of Neurobiology, Barrow Neurological Institute, Dignity Health, Phoenix, AZ, USA
| | - Zoltan Rumbus
- Department of Thermophysiology, Institute for Translational Medicine, Medical School, University of Pecs, Pecs, Hungary
| | - Robson C L Vizin
- Thermoregulation and Systemic Inflammation Laboratory (FeverLab), Trauma Research, St. Joseph's Hospital and Medical Center, Dignity Health, Phoenix, AZ, USA
| | - Nelli Farkas
- Institute for Translational Medicine, Medical School and Szentagothai Research Centre, University of Pecs, Pecs, Hungary
| | - Judit Hegyi
- Institute for Translational Medicine, Medical School and Szentagothai Research Centre, University of Pecs, Pecs, Hungary
| | - Zsolt Szakacs
- Institute for Translational Medicine, Medical School and Szentagothai Research Centre, University of Pecs, Pecs, Hungary
| | - Margit Solymar
- Department of Thermophysiology, Institute for Translational Medicine, Medical School, University of Pecs, Pecs, Hungary
| | - Alexandra Csenkey
- Department of Thermophysiology, Institute for Translational Medicine, Medical School, University of Pecs, Pecs, Hungary
| | | | | | | | - Wade D Van Horn
- School of Molecular Sciences, Arizona State University, Tempe, AZ, USA
| | - Peter Hegyi
- Institute for Translational Medicine, Medical School and Szentagothai Research Centre, University of Pecs, Pecs, Hungary; Department of Translational Medicine, First Department of Medicine, Medical School, University of Pecs, Pecs, Hungary
| | - Andrej A Romanovsky
- Thermoregulation and Systemic Inflammation Laboratory (FeverLab), Trauma Research, St. Joseph's Hospital and Medical Center, Dignity Health, Phoenix, AZ, USA; School of Molecular Sciences, Arizona State University, Tempe, AZ, USA; Zharko Pharma Inc., Olympia, WA, USA.
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16
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Talavera K, Startek JB, Alvarez-Collazo J, Boonen B, Alpizar YA, Sanchez A, Naert R, Nilius B. Mammalian Transient Receptor Potential TRPA1 Channels: From Structure to Disease. Physiol Rev 2019; 100:725-803. [PMID: 31670612 DOI: 10.1152/physrev.00005.2019] [Citation(s) in RCA: 214] [Impact Index Per Article: 42.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
The transient receptor potential ankyrin (TRPA) channels are Ca2+-permeable nonselective cation channels remarkably conserved through the animal kingdom. Mammals have only one member, TRPA1, which is widely expressed in sensory neurons and in non-neuronal cells (such as epithelial cells and hair cells). TRPA1 owes its name to the presence of 14 ankyrin repeats located in the NH2 terminus of the channel, an unusual structural feature that may be relevant to its interactions with intracellular components. TRPA1 is primarily involved in the detection of an extremely wide variety of exogenous stimuli that may produce cellular damage. This includes a plethora of electrophilic compounds that interact with nucleophilic amino acid residues in the channel and many other chemically unrelated compounds whose only common feature seems to be their ability to partition in the plasma membrane. TRPA1 has been reported to be activated by cold, heat, and mechanical stimuli, and its function is modulated by multiple factors, including Ca2+, trace metals, pH, and reactive oxygen, nitrogen, and carbonyl species. TRPA1 is involved in acute and chronic pain as well as inflammation, plays key roles in the pathophysiology of nearly all organ systems, and is an attractive target for the treatment of related diseases. Here we review the current knowledge about the mammalian TRPA1 channel, linking its unique structure, widely tuned sensory properties, and complex regulation to its roles in multiple pathophysiological conditions.
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Affiliation(s)
- Karel Talavera
- Laboratory of Ion Channel Research, Department of Cellular and Molecular Medicine, KU Leuven; VIB Center for Brain and Disease Research, Leuven, Belgium
| | - Justyna B Startek
- Laboratory of Ion Channel Research, Department of Cellular and Molecular Medicine, KU Leuven; VIB Center for Brain and Disease Research, Leuven, Belgium
| | - Julio Alvarez-Collazo
- Laboratory of Ion Channel Research, Department of Cellular and Molecular Medicine, KU Leuven; VIB Center for Brain and Disease Research, Leuven, Belgium
| | - Brett Boonen
- Laboratory of Ion Channel Research, Department of Cellular and Molecular Medicine, KU Leuven; VIB Center for Brain and Disease Research, Leuven, Belgium
| | - Yeranddy A Alpizar
- Laboratory of Ion Channel Research, Department of Cellular and Molecular Medicine, KU Leuven; VIB Center for Brain and Disease Research, Leuven, Belgium
| | - Alicia Sanchez
- Laboratory of Ion Channel Research, Department of Cellular and Molecular Medicine, KU Leuven; VIB Center for Brain and Disease Research, Leuven, Belgium
| | - Robbe Naert
- Laboratory of Ion Channel Research, Department of Cellular and Molecular Medicine, KU Leuven; VIB Center for Brain and Disease Research, Leuven, Belgium
| | - Bernd Nilius
- Laboratory of Ion Channel Research, Department of Cellular and Molecular Medicine, KU Leuven; VIB Center for Brain and Disease Research, Leuven, Belgium
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17
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Voets T, Vriens J, Vennekens R. Targeting TRP Channels - Valuable Alternatives to Combat Pain, Lower Urinary Tract Disorders, and Type 2 Diabetes? Trends Pharmacol Sci 2019; 40:669-683. [PMID: 31395287 DOI: 10.1016/j.tips.2019.07.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 05/12/2019] [Accepted: 07/10/2019] [Indexed: 12/18/2022]
Abstract
Transient receptor potential (TRP) channels are a family of functionally diverse and widely expressed cation channels involved in a variety of cell signaling and sensory pathways. Research in the last two decades has not only shed light on the physiological roles of the 28 mammalian TRP channels, but also revealed the involvement of specific TRP channels in a plethora of inherited and acquired human diseases. Considering the historical successes of other types of ion channels as therapeutic drug targets, small molecules that target specific TRP channels hold promise as treatments for a variety of human conditions. In recent research, important new findings have highlighted the central role of TRP channels in chronic pain, lower urinary tract disorders, and type 2 diabetes, conditions with an unmet medical need. Here, we discuss how these advances support the development of TRP-channel-based pharmacotherapies as valuable alternatives to the current mainstays of treatment.
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Affiliation(s)
- Thomas Voets
- Laboratory of Ion Channel Research, VIB Center for Brain and Disease Research, Leuven, Belgium; Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium.
| | - Joris Vriens
- Laboratory of Endometrium, Endometriosis and Reproductive Medicine, Department of Development and Regeneration, KU Leuven, Leuven, Belgium
| | - Rudi Vennekens
- Laboratory of Ion Channel Research, VIB Center for Brain and Disease Research, Leuven, Belgium; Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium
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18
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Kozyreva T, Kozaruk V, Meyta E. Skin TRPA1 ion channel participates in thermoregulatory response to cold. Comparison with the effect of TRPM8. J Therm Biol 2019; 84:208-213. [DOI: 10.1016/j.jtherbio.2019.06.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Revised: 06/27/2019] [Accepted: 06/29/2019] [Indexed: 12/17/2022]
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19
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Donovan C, Hansbro PM. TRPA1: A potential target for cold-induced airway disease? Respirology 2018; 24:193-194. [PMID: 30548942 DOI: 10.1111/resp.13453] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Accepted: 11/20/2018] [Indexed: 01/24/2023]
Affiliation(s)
- Chantal Donovan
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, The University of Newcastle, Newcastle, NSW, Australia
| | - Philip M Hansbro
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, The University of Newcastle, Newcastle, NSW, Australia.,Centre for Inflammation, Centenary Institute and School of Life Sciences, University of Technology Sydney, Sydney, NSW, Australia
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20
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Abstract
The transient receptor potential ankyrin 1 (TRPA1) ion channel is expressed in pain-sensing neurons and other tissues and has become a major target in the development of novel pharmaceuticals. A remarkable feature of the channel is its long list of activators, many of which we are exposed to in daily life. Many of these agonists induce pain and inflammation, making TRPA1 a major target for anti-inflammatory and analgesic therapies. Studies in human patients and in experimental animals have confirmed an important role for TRPA1 in a number of pain conditions. Over the recent years, much progress has been made in elucidating the molecular structure of TRPA1 and in discovering binding sites and modulatory sites of the channel. Because the list of published mutations and important molecular sites is steadily growing and because it has become difficult to see the forest for the trees, this review aims at summarizing the current knowledge about TRPA1, with a special focus on the molecular structure and the known binding or gating sites of the channel.
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Affiliation(s)
- Jannis E Meents
- Institute of Physiology, University Hospital RWTH Aachen , Aachen , Germany
| | - Cosmin I Ciotu
- Center for Physiology and Pharmacology, Medical University of Vienna , Vienna , Austria
| | - Michael J M Fischer
- Center for Physiology and Pharmacology, Medical University of Vienna , Vienna , Austria
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21
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Moran MM, Szallasi A. Targeting nociceptive transient receptor potential channels to treat chronic pain: current state of the field. Br J Pharmacol 2018; 175:2185-2203. [PMID: 28924972 PMCID: PMC5980611 DOI: 10.1111/bph.14044] [Citation(s) in RCA: 137] [Impact Index Per Article: 22.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Revised: 08/27/2017] [Accepted: 09/03/2017] [Indexed: 12/12/2022] Open
Abstract
Control of chronic pain is frequently inadequate and/or associated with intolerable adverse effects, prompting a frantic search for new therapeutics and new therapeutic targets. Nearly two decades of preclinical and clinical research supports the involvement of transient receptor potential (TRP) channels in temperature perception, nociception and sensitization. Although there has been considerable excitement around the therapeutic potential of this channel family since the cloning and identification of TRPV1 cation channels as the capsaicin receptor more than 20 years ago, only modulators of a few channels have been tested clinically. TRPV1 channel antagonists have suffered from side effects related to the channel's role in temperature sensation; however, high dose formulations of capsaicin have reached the market and shown therapeutic utility. A number of potent, small molecule antagonists of TRPA1 channels have recently advanced into clinical trials for the treatment of inflammatory and neuropathic pain, and TRPM8 antagonists are following closely behind for cold allodynia. TRPV3, TRPV4, TRPM2 and TRPM3 channels have also been of significant interest. This review discusses the preclinical promise and status of novel analgesic agents that target TRP channels and the challenges that these compounds may face in development and clinical practice. LINKED ARTICLES This article is part of a themed section on Recent Advances in Targeting Ion Channels to Treat Chronic Pain. To view the other articles in this section visit http://onlinelibrary.wiley.com/doi/10.1111/bph.v175.12/issuetoc.
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Affiliation(s)
| | - Arpad Szallasi
- Clinical LaboratoriesBaptist Medical CenterJacksonvilleFLUSA
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22
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Señarís R, Ordás P, Reimúndez A, Viana F. Mammalian cold TRP channels: impact on thermoregulation and energy homeostasis. Pflugers Arch 2018; 470:761-777. [DOI: 10.1007/s00424-018-2145-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Accepted: 04/05/2018] [Indexed: 12/22/2022]
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23
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Akashi HD, Saito S, Cádiz Díaz A, Makino T, Tominaga M, Kawata M. Comparisons of behavioural and TRPA1 heat sensitivities in three sympatric CubanAnolislizards. Mol Ecol 2018; 27:2234-2242. [DOI: 10.1111/mec.14572] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Revised: 03/06/2018] [Accepted: 03/12/2018] [Indexed: 12/26/2022]
Affiliation(s)
- Hiroshi D. Akashi
- Department of Ecology and Evolutionary Biology; Graduate School of Life Sciences; Tohoku University; Sendai Japan
| | - Shigeru Saito
- Division of Cell Signaling; Okazaki Institute for Integrative Bioscience (National Institute for Physiological Sciences); National Institutes of Natural Sciences; Okazaki Japan
| | - Antonio Cádiz Díaz
- Department of Ecology and Evolutionary Biology; Graduate School of Life Sciences; Tohoku University; Sendai Japan
- Facultad de Biología; Universidad de La Habana; La Habana Cuba
| | - Takashi Makino
- Department of Ecology and Evolutionary Biology; Graduate School of Life Sciences; Tohoku University; Sendai Japan
| | - Makoto Tominaga
- Division of Cell Signaling; Okazaki Institute for Integrative Bioscience (National Institute for Physiological Sciences); National Institutes of Natural Sciences; Okazaki Japan
| | - Masakado Kawata
- Department of Ecology and Evolutionary Biology; Graduate School of Life Sciences; Tohoku University; Sendai Japan
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24
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Sensitivity of Takifugu TRPA1 to thermal stimulations analyzed in oocytes expression system. Neuroreport 2018; 29:280-285. [DOI: 10.1097/wnr.0000000000000939] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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25
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Pakai E, Tekus V, Zsiboras C, Rumbus Z, Olah E, Keringer P, Khidhir N, Matics R, Deres L, Ordog K, Szentes N, Pohoczky K, Kemeny A, Hegyi P, Pinter E, Garami A. The Neurokinin-1 Receptor Contributes to the Early Phase of Lipopolysaccharide-Induced Fever via Stimulation of Peripheral Cyclooxygenase-2 Protein Expression in Mice. Front Immunol 2018; 9:166. [PMID: 29459872 PMCID: PMC5807668 DOI: 10.3389/fimmu.2018.00166] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2017] [Accepted: 01/18/2018] [Indexed: 12/20/2022] Open
Abstract
Neurokinin (NK) signaling is involved in various inflammatory processes. A common manifestation of systemic inflammation is fever, which is usually induced in animal models with the administration of bacterial lipopolysaccharide (LPS). A role for the NK1 receptor was shown in LPS-induced fever, but the underlying mechanisms of how the NK1 receptor contributes to febrile response, especially in the early phase, have remained unknown. We administered LPS (120 µg/kg, intraperitoneally) to mice with the Tacr1 gene, i.e., the gene encoding the NK1 receptor, either present (Tacr1+/+ ) or absent (Tacr1-/- ) and measured their thermoregulatory responses, serum cytokine levels, tissue cyclooxygenase-2 (COX-2) expression, and prostaglandin (PG) E2 concentration. We found that the LPS-induced febrile response was attenuated in Tacr1-/- compared to their Tacr1+/+ littermates starting from 40 min postinfusion. The febrigenic effect of intracerebroventricularly administered PGE2 was not suppressed in the Tacr1-/- mice. Serum concentration of pyrogenic cytokines did not differ between Tacr1-/- and Tacr1+/+ at 40 min post-LPS infusion. Administration of LPS resulted in amplification of COX-2 mRNA expression in the lungs, liver, and brain of the mice, which was statistically indistinguishable between the genotypes. In contrast, the LPS-induced augmentation of COX-2 protein expression was attenuated in the lungs and tended to be suppressed in the liver of Tacr1-/- mice compared with Tacr1+/+ mice. The Tacr1+/+ mice responded to LPS with a significant surge of PGE2 production in the lungs, whereas Tacr1-/- mice did not. In conclusion, the NK1 receptor is necessary for normal fever genesis. Our results suggest that the NK1 receptor contributes to the early phase of LPS-induced fever by enhancing COX-2 protein expression in the periphery. These findings advance the understanding of the crosstalk between NK signaling and the "cytokine-COX-2-prostaglandin E2" axis in systemic inflammation, thereby open up the possibilities for new therapeutic approaches.
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Affiliation(s)
- Eszter Pakai
- Institute for Translational Medicine, Medical School, University of Pecs, Pecs, Hungary.,Momentum Gastroenterology Multidisciplinary Research Group, Hungarian Academy of Sciences - University of Szeged, Szeged, Hungary
| | - Valeria Tekus
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pecs, Pecs, Hungary.,Janos Szentagothai Research Centre, University of Pecs, Pecs, Hungary
| | - Csaba Zsiboras
- Institute for Translational Medicine, Medical School, University of Pecs, Pecs, Hungary
| | - Zoltan Rumbus
- Institute for Translational Medicine, Medical School, University of Pecs, Pecs, Hungary
| | - Emoke Olah
- Institute for Translational Medicine, Medical School, University of Pecs, Pecs, Hungary
| | - Patrik Keringer
- Institute for Translational Medicine, Medical School, University of Pecs, Pecs, Hungary
| | - Nora Khidhir
- Institute for Translational Medicine, Medical School, University of Pecs, Pecs, Hungary
| | - Robert Matics
- Institute for Translational Medicine, Medical School, University of Pecs, Pecs, Hungary
| | - Laszlo Deres
- Janos Szentagothai Research Centre, University of Pecs, Pecs, Hungary.,First Department of Medicine, Medical School, University of Pecs, Pecs, Hungary
| | - Katalin Ordog
- Janos Szentagothai Research Centre, University of Pecs, Pecs, Hungary.,First Department of Medicine, Medical School, University of Pecs, Pecs, Hungary
| | - Nikolett Szentes
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pecs, Pecs, Hungary.,Janos Szentagothai Research Centre, University of Pecs, Pecs, Hungary
| | - Krisztina Pohoczky
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pecs, Pecs, Hungary.,Janos Szentagothai Research Centre, University of Pecs, Pecs, Hungary
| | - Agnes Kemeny
- Janos Szentagothai Research Centre, University of Pecs, Pecs, Hungary.,Department of Medical Biology, Medical School, University of Pecs, Pecs, Hungary
| | - Peter Hegyi
- Institute for Translational Medicine, Medical School, University of Pecs, Pecs, Hungary.,Momentum Gastroenterology Multidisciplinary Research Group, Hungarian Academy of Sciences - University of Szeged, Szeged, Hungary.,First Department of Medicine, University of Szeged, Szeged, Hungary
| | - Erika Pinter
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pecs, Pecs, Hungary.,Janos Szentagothai Research Centre, University of Pecs, Pecs, Hungary
| | - Andras Garami
- Institute for Translational Medicine, Medical School, University of Pecs, Pecs, Hungary
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26
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Moore C, Gupta R, Jordt SE, Chen Y, Liedtke WB. Regulation of Pain and Itch by TRP Channels. Neurosci Bull 2018; 34:120-142. [PMID: 29282613 PMCID: PMC5799130 DOI: 10.1007/s12264-017-0200-8] [Citation(s) in RCA: 191] [Impact Index Per Article: 31.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Accepted: 10/27/2017] [Indexed: 02/07/2023] Open
Abstract
Nociception is an important physiological process that detects harmful signals and results in pain perception. In this review, we discuss important experimental evidence involving some TRP ion channels as molecular sensors of chemical, thermal, and mechanical noxious stimuli to evoke the pain and itch sensations. Among them are the TRPA1 channel, members of the vanilloid subfamily (TRPV1, TRPV3, and TRPV4), and finally members of the melastatin group (TRPM2, TRPM3, and TRPM8). Given that pain and itch are pro-survival, evolutionarily-honed protective mechanisms, care has to be exercised when developing inhibitory/modulatory compounds targeting specific pain/itch-TRPs so that physiological protective mechanisms are not disabled to a degree that stimulus-mediated injury can occur. Such events have impeded the development of safe and effective TRPV1-modulating compounds and have diverted substantial resources. A beneficial outcome can be readily accomplished via simple dosing strategies, and also by incorporating medicinal chemistry design features during compound design and synthesis. Beyond clinical use, where compounds that target more than one channel might have a place and possibly have advantageous features, highly specific and high-potency compounds will be helpful in mechanistic discovery at the structure-function level.
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Affiliation(s)
- Carlene Moore
- Department of Neurology, Duke University Medical Center, Durham, NC, 27710, USA
| | - Rupali Gupta
- Department of Neurology, Duke University Medical Center, Durham, NC, 27710, USA
| | - Sven-Eric Jordt
- Department of Anesthesiology, Duke University Medical Center, Durham, NC, 27710, USA
| | - Yong Chen
- Department of Neurology, Duke University Medical Center, Durham, NC, 27710, USA.
| | - Wolfgang B Liedtke
- Department of Neurology, Duke University Medical Center, Durham, NC, 27710, USA.
- Department of Anesthesiology, Duke University Medical Center, Durham, NC, 27710, USA.
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28
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Jeon S, Caterina MJ. Molecular basis of peripheral innocuous warmth sensitivity. HANDBOOK OF CLINICAL NEUROLOGY 2018; 156:69-82. [PMID: 30454610 DOI: 10.1016/b978-0-444-63912-7.00004-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The perception of innocuous warmth is a sensory capability that facilitates thermoregulatory, social, hedonic, and even predatory functions. It has long been recognized that innocuous warmth perception is triggered by activation of a subpopulation of specially tuned peripheral thermosensory neurons. In addition, there is growing evidence that thermotransduction by nonneuronal cells, such as skin keratinocytes, might contribute to or modulate our thermosensory experience. Yet, the precise molecular mechanisms underlying warmth transduction are only now being uncovered. Recent molecular genetics approaches have led to the identification of multiple candidate warmth-transducing molecules that appear to confer thermosensitivity upon innocuous warmth afferents and/or neighboring cell types. Most, but not all, of these candidate transducers are members of the transient receptor potential (TRP) ion channel family. Among the latter, evidence supporting a function in innocuous warmth sensation is strongest for TRPV1 and TRPM2 in mammals and for TRPA1 in nonmammalian species.
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Affiliation(s)
- Sangmin Jeon
- Departments of Neurosurgery, Biological Chemistry, and Neuroscience, and Neurosurgery Pain Research Institute, Johns Hopkins School of Medicine, Baltimore, MD, United States
| | - Michael J Caterina
- Departments of Neurosurgery, Biological Chemistry, and Neuroscience, and Neurosurgery Pain Research Institute, Johns Hopkins School of Medicine, Baltimore, MD, United States.
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29
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Abstract
Heat exchange processes between the body and the environment are introduced. The definition of the thermoneutral zone as the ambient temperature range within which body temperature (Tb) regulation is achieved only by nonevaporative processes is explained. Thermoreceptors, thermoregulatory effectors (both physiologic and behavioral), and neural pathways and Tb signals that connect receptors and effectors into a thermoregulation system are reviewed. A classification of thermoeffectors is proposed. A consensus concept is presented, according to which the thermoregulation system is organized as a dynamic federation of independent thermoeffector loops. While the activity of each effector is driven by a unique combination of deep (core) and superficial (shell) Tbs, the regulated variable of the system can be viewed as a spatially distributed Tb with a heavily represented core and a lightly represented shell. Core Tb is the main feedback; it is always negative. Shell Tbs (mostly of the hairy skin) represent the auxiliary feedback, which can be negative or positive, and which decreases the system's response time and load error. Signals from the glabrous (nonhairy) skin about the temperature of objects in the environment serve as feedforward signals for various behaviors. Physiologic effectors do not use feedforward signals. The system interacts with other homeostatic systems by "meshing" with their loops. Coordination between different thermoeffectors is achieved through the common controlled variable, Tb. The term balance point (not set point) is used for a regulated level of Tb. The term interthreshold zone is used for a Tb range in which no effectors are activated. Thermoregulatory states are classified, based on whether: Tb is increased (hyperthermia) or decreased (hypothermia); the interthreshold zone is narrow (homeothermic type of regulation) or wide (poikilothermic type); and the balance point is increased (fever) or decreased (anapyrexia). During fever, thermoregulation can be either homeothermic or poikilothermic; anapyrexia is always a poikilothermic state. The biologic significance of poikilothermic states is discussed. As an example of practical applications of the concept presented, thermopharmacology is reviewed. Thermopharmacology uses drugs to modulate specific temperature signals at the level of a thermoreceptor (transient receptor potential channel).
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30
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Oda M, Saito K, Hatta S, Kubo Y, Saitoh O. Chemical and thermal sensitivity of medaka TRPA1 analyzed in heterologous expression system. Biochem Biophys Res Commun 2017; 494:194-201. [DOI: 10.1016/j.bbrc.2017.10.057] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Accepted: 10/12/2017] [Indexed: 10/18/2022]
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31
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Inui K, Chen C, Pauli JL, Kuroki C, Tashiro S, Kanmura Y, Kashiwadani H, Kuwaki T. Nasal TRPA1 mediates irritant-induced bradypnea in mice. Physiol Rep 2017; 4:4/24/e13098. [PMID: 28039411 PMCID: PMC5210382 DOI: 10.14814/phy2.13098] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Revised: 12/01/2016] [Accepted: 12/03/2016] [Indexed: 12/17/2022] Open
Abstract
Transient receptor potential ankyrin 1 (TRPA1), a member of the TRP superfamily, exists in sensory neurons such as trigeminal neurons innervating the nasal cavity and vagal neurons innervating the trachea and the lung. Although TRPA1 has been proposed as an irritant receptor that, when stimulated, triggers bradypnea, precise locations of the receptors responsible have not been elucidated. Here, we examined the relative importance of TRPA1 located in the upper airway (nasal) and the lower airway (trachea/lungs) in urethane-anesthetized mice. To stimulate the upper and lower airways separately, two cannulas were inserted through a hole made in the trachea just caudal to the thyroid cartilage, one into the nasal cavity and the second into the lower trachea. A vapor of one of the TRPA1-agonists, allyl isothiocyanate (AITC), was introduced by placing a piece of cotton paper soaked with AITC solution into the airline. AITC decreased the respiratory frequency when applied to the upper airway (ca -30%) but not to the lower airway (ca -5%). No response was observed in TRPA1 knockout mice. Contribution of the olfactory nerve seemed minimal because olfactory bulbectomized wild-type mice showed a similar response to that of the intact mice. AITC-induced bradypnea seemed to be mediated, at least in part, by the trigeminal nerve because trigeminal ganglion neurons were activated by AITC as revealed by an increase in the phosphorylated form of extracellular signal-regulated kinase in the neurons. These data clearly show that trigeminal TRPA1 in the nasal cavity play an essential role in irritant-induced bradypnea.
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Affiliation(s)
- Keiichi Inui
- Department of Physiology, Kagoshima University Graduate School of Medical & Dental Sciences, Kagoshima, Japan
| | - ChangPing Chen
- Department of Physiology, Kagoshima University Graduate School of Medical & Dental Sciences, Kagoshima, Japan
| | - Jordan L Pauli
- Department of Physiology, Kagoshima University Graduate School of Medical & Dental Sciences, Kagoshima, Japan
| | - Chiharu Kuroki
- Department of Physiology, Kagoshima University Graduate School of Medical & Dental Sciences, Kagoshima, Japan.,Anesthesiology & Critical Care Medicine, Kagoshima University Graduate School of Medical & Dental Sciences, Kagoshima, Japan
| | - Shogo Tashiro
- Department of Physiology, Kagoshima University Graduate School of Medical & Dental Sciences, Kagoshima, Japan.,Anesthesiology & Critical Care Medicine, Kagoshima University Graduate School of Medical & Dental Sciences, Kagoshima, Japan
| | - Yuichi Kanmura
- Anesthesiology & Critical Care Medicine, Kagoshima University Graduate School of Medical & Dental Sciences, Kagoshima, Japan
| | - Hideki Kashiwadani
- Department of Physiology, Kagoshima University Graduate School of Medical & Dental Sciences, Kagoshima, Japan
| | - Tomoyuki Kuwaki
- Department of Physiology, Kagoshima University Graduate School of Medical & Dental Sciences, Kagoshima, Japan
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32
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Relevance of TRPA1 and TRPM8 channels as vascular sensors of cold in the cutaneous microvasculature. Pflugers Arch 2017; 470:779-786. [PMID: 29164310 PMCID: PMC5942358 DOI: 10.1007/s00424-017-2085-9] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Revised: 10/16/2017] [Accepted: 10/30/2017] [Indexed: 01/22/2023]
Abstract
Cold exposure is directly related to skin conditions, such as frostbite. This is due to the cold exposure inducing a vasoconstriction to reduce cutaneous blood flow and protect against heat loss. However, a long-term constriction will cause ischaemia and potentially irreversible damage. We have developed techniques to elucidate the mechanisms of the vascular cold response. We focused on two ligand-gated transient receptor potential (TRP) channels, namely, the established “cold sensors” TRP ankyrin 1 (TRPA1) and TRP melastin (TRPM8). We used the anaesthetised mouse and measured cutaneous blood flow by laser speckle imaging. Two cold treatments were used. A generalised cold treatment was achieved through whole paw water immersion (10 °C for 5 min) and a localised cold treatment that will be potentially easier to translate to human studies was carried out on the mouse paw with a copper cold probe (0.85-cm diameter). The results show that TRPA1 and TRPM8 can each act as a vascular cold sensor to mediate the vasoconstrictor component of whole paw cooling as expected from our previous research. However, the local cooling-induced responses were only blocked when the TRPA1 and TRPM8 antagonists were given simultaneously. This suggests that this localised cold probe response requires both functional TRPA1 and TRPM8.
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Transient Receptor Potential Vanilloid 1 Antagonists Prevent Anesthesia-induced Hypothermia and Decrease Postincisional Opioid Dose Requirements in Rodents. Anesthesiology 2017; 127:813-823. [DOI: 10.1097/aln.0000000000001812] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Abstract
Background
Intraoperative hypothermia and postoperative pain control are two important clinical challenges in anesthesiology. Transient receptor potential vanilloid 1 has been implicated both in thermoregulation and pain. Transient receptor potential vanilloid 1 antagonists were not advanced as analgesics in humans in part due to a side effect of hyperthermia. This study tested the hypothesis that a single, preincision injection of a transient receptor potential vanilloid 1 antagonist could prevent anesthesia-induced hypothermia and decrease the opioid requirement for postsurgical hypersensitivity.
Methods
General anesthesia was induced in rats and mice with either isoflurane or ketamine, and animals were treated with transient receptor potential vanilloid 1 antagonists (AMG 517 or ABT-102). The core body temperature and oxygen consumption were monitored during anesthesia and the postanesthesia period. The effect of preincision AMG 517 on morphine-induced reversal of postincision hyperalgesia was evaluated in rats.
Results
AMG 517 and ABT-102 dose-dependently prevented general anesthesia-induced hypothermia (mean ± SD; from 1.5° ± 0.1°C to 0.1° ± 0.1°C decrease; P < 0.001) without causing hyperthermia in the postanesthesia phase. Isoflurane-induced hypothermia was prevented by AMG 517 in wild-type but not in transient receptor potential vanilloid 1 knockout mice (n = 7 to 11 per group). The prevention of anesthesia-induced hypothermia by AMG 517 involved activation of brown fat thermogenesis with a possible contribution from changes in vasomotor tone. A single preincision dose of AMG 517 decreased the morphine dose requirement for the reduction of postincision thermal (12.6 ± 3.0 vs. 15.6 ± 1.0 s) and mechanical (6.8 ± 3.0 vs. 9.5 ± 3.0 g) withdrawal latencies.
Conclusions
These studies demonstrate that transient receptor potential vanilloid 1 antagonists prevent anesthesia-induced hypothermia and decrease opioid dose requirements for the reduction of postincisional hypersensitivity in rodents.
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34
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Saito S, Tominaga M. Evolutionary tuning of TRPA1 and TRPV1 thermal and chemical sensitivity in vertebrates. Temperature (Austin) 2017; 4:141-152. [PMID: 28680930 DOI: 10.1080/23328940.2017.1315478] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Revised: 03/30/2017] [Accepted: 03/30/2017] [Indexed: 12/24/2022] Open
Abstract
Thermal perception is an essential sensory system for survival since temperature fluctuations affect various biologic processes. Therefore, evolutionary changes in thermosensory systems may have played important roles in adaptation processes. Comparative analyses of sensory receptors among different species can provide us with important clues to understand the molecular basis for adaptation. Several ion channels belonging to the transient receptor potential (TRP) superfamily serve as thermal sensors in a wide variety of animal species. These TRP proteins are multimodal receptors that are activated by temperature as well as other sensory stimuli. Among them TRPV1 and TRPA1 are activated by noxious ranges of thermal stimuli and irritating chemicals, and are mainly expressed in nociceptive sensory neurons. Comparative analyses of TRPV1 and TRPA1 among various vertebrate species revealed evolutionary changes that likely contributed to diversification of sensory perception. Whereas heat-induced TRPV1 responses have been conserved across many vertebrates, TRPA1 varied among species. Mutagenesis experiments using these two channels from various species also helped characterize the molecular basis for their activation and inhibition. Meanwhile, recent detailed comparative analyses using closely related species showed shifts in TRPV1 and TRPA1 thermal sensitivity that allowed adaptation to different thermal environments. Changes in TRPV1 heat responses appear to arise from just a few amino acid differences among species. These observations suggest that evolutionary changes in peripheral sensors are likely driving force for shifting thermal perception in adaptation processes.
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Affiliation(s)
- Shigeru Saito
- Division of Cell Signaling, Okazaki Institute for Integrative Bioscience (National Institute for Physiological Sciences), National Institute of Natural Sciences, Okazaki, Japan.,Department of Physiological Sciences, SOKENDAI (The Graduate University for Advanced Studies), Okazaki, Japan
| | - Makoto Tominaga
- Division of Cell Signaling, Okazaki Institute for Integrative Bioscience (National Institute for Physiological Sciences), National Institute of Natural Sciences, Okazaki, Japan.,Department of Physiological Sciences, SOKENDAI (The Graduate University for Advanced Studies), Okazaki, Japan
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35
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Skerratt S. Recent Progress in the Discovery and Development of TRPA1 Modulators. PROGRESS IN MEDICINAL CHEMISTRY 2017; 56:81-115. [PMID: 28314413 DOI: 10.1016/bs.pmch.2016.11.003] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
TRPA1 is a well-validated therapeutic target in areas of high unmet medical need that include pain and respiratory disorders. The human genetic rationale for TRPA1 as a pain target is provided by a study describing a rare gain-of-function mutation in TRPA1, causing familial episodic pain syndrome. There is a growing interest in the TRPA1 field, with many pharmaceutical companies reporting the discovery of TRPA1 chemical matter; however, GRC 17536 remains to date the only TRPA1 antagonist to have completed Phase IIa studies. A key issue in the progression of TRPA1 programmes is the identification of high-quality orally bioavailable molecules. Most published TRPA1 ligands are commonly not suitable for clinical progression due to low lipophilic efficiency and/or poor absorption, distribution, metabolism, excretion and pharmaceutical properties. The recent TRPA1 cryogenic electron microscopy structure from the Cheng and Julius labs determined the structure of full-length human TRPA1 at up to 4Å resolution in the presence of TRPA1 ligands. This ground-breaking science paves the way to enable structure-based drug design within the TRPA1 field.
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Affiliation(s)
- S Skerratt
- Convergence (a Biogen Company), Cambridge, United Kingdom
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36
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Analgesic effect of dimethyl trisulfide in mice is mediated by TRPA1 and sst 4 receptors. Nitric Oxide 2017; 65:10-21. [PMID: 28137611 DOI: 10.1016/j.niox.2017.01.012] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Revised: 01/25/2017] [Accepted: 01/25/2017] [Indexed: 12/16/2022]
Abstract
TRPA1 receptors are calcium-permeable ligand-gated channels expressed in primary sensory neurons and involved in inflammation and pain. Activation of these neurons might have analgesic effect. Suggested mechanism of analgesic effect mediated by TRPA1 activation is the release of somatostatin (SOM) and its action on sst4 receptors. In the present study analgesic effect of TRPA1 activation on primary sensory neurons by organic trisulfide compound dimethyl trisulfide (DMTS) presumably leading to SOM release was investigated. Opening of TRPA1 by DMTS in CHO cells was examined by patch-clamp and fluorescent Ca2+ detection. Ca2+ influx upon DMTS administration in trigeminal ganglion (TRG) neurons of TRPA1 receptor wild-type (WT) and knockout (KO) mice was detected by ratiometric Ca2+ imaging. SOM release from sensory nerves of murine skin was assessed by radioimmunoassay. Analgesic effect of DMTS in mild heat injury-induced mechanical hyperalgesia was examined by dynamic plantar aesthesiometry. Regulatory role of DMTS on deep body temperature (Tb) was measured by thermocouple thermometry with respirometry and by telemetric thermometry. DMTS produced TRPA1-mediated currents and elevated [Ca2+]i in CHO cells. Similar data were obtained in TRG neurons. DMTS released SOM from murine sensory neurons TRPA1-dependently. DMTS exerted analgesic effect mediated by TRPA1 and sst4 receptors. DMTS-evoked hypothermia and hypokinesis were attenuated in freely-moving TRPA1 KO animals. Our study has presented original evidence regarding analgesic action of DMTS which might be due to TRPA1-mediated SOM release from sensory neurons and activation of sst4 receptors. DMTS could be a novel analgesic drug candidate.
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37
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Taguchi K. [Role of Transient Receptor Potential Channels in Paclitaxel- and Oxaliplatin-induced Peripheral Neuropathy]. YAKUGAKU ZASSHI 2016; 136:287-96. [PMID: 26831807 DOI: 10.1248/yakushi.15-00214] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Peripheral neuropathy is a common adverse effect of paclitaxel and oxaliplatin treatment. The major dose-limiting side effect of these drugs is peripheral sensory neuropathy. The symptoms of paclitaxel-induced neuropathy are mostly sensory and peripheral in nature, consisting of mechanical allodynia/hyperalgesia, tingling, and numbness. Oxaliplatin-induced neurotoxicity manifests as rapid-onset neuropathic symptoms that are exacerbated by cold exposure and as chronic neuropathy that develops after several treatment cycles. Although many basic and clinical researchers have studied anticancer drug-induced peripheral neuropathy, the mechanism is not well understood. In this review, we focus on (1) analysis of transient receptor potential vanilloid 1 (TRPV1) channel expression in the rat dorsal root ganglion (DRG) after paclitaxel treatment and (2) analysis of transient receptor potential ankyrin 1 (TRPA1) channel in the DRG after oxaliplatin treatment. This review describes that (1) paclitaxel-induced neuropathic pain may be the result of up-regulation of TRPV1 in small- and medium-diameter DRG neurons. In addition, paclitaxel treatment increases the release of substance P, but not calcitonin gene-related peptide, in the superficial layers of the spinal dorsal horn. (2) TRPA1 expression via activation of p38 mitogen-activated protein kinase in small-diameter DRG neurons, at least in part, contributes to the development of oxaliplatin-induced acute cold hyperalgesia. We suggest that TRPV1 or TRPA1 antagonists may be potential therapeutic lead compounds for treating anticancer drug-induced peripheral neuropathy.
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Affiliation(s)
- Kyoji Taguchi
- Departments of Medicinal Pharmacology, Showa Pharmaceutical University
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38
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Blocking TRPA1 in Respiratory Disorders: Does It Hold a Promise? Pharmaceuticals (Basel) 2016; 9:ph9040070. [PMID: 27827953 PMCID: PMC5198045 DOI: 10.3390/ph9040070] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Revised: 09/23/2016] [Accepted: 09/28/2016] [Indexed: 12/22/2022] Open
Abstract
Transient Receptor Potential Ankyrin 1 (TRPA1) ion channel is expressed abundantly on the C fibers that innervate almost entire respiratory tract starting from oral cavity and oropharynx, conducting airways in the trachea, bronchi, terminal bronchioles, respiratory bronchioles and upto alveolar ducts and alveoli. Functional presence of TRPA1 on non-neuronal cells got recognized recently. TRPA1 plays a well-recognized role of “chemosensor”, detecting presence of exogenous irritants and endogenous pro-inflammatory mediators that are implicated in airway inflammation and sensory symptoms like chronic cough, asthma, chronic obstructive pulmonary disease (COPD), allergic rhinitis and cystic fibrosis. TRPA1 can remain activated chronically due to elevated levels and continued presence of such endogenous ligands and pro-inflammatory mediators. Several selective TRPA1 antagonists have been tested in animal models of respiratory disease and their performance is very promising. Although there is no TRPA1 antagonist in advanced clinical trials or approved on market yet to treat respiratory diseases, however, limited but promising evidences available so far indicate likelihood that targeting TRPA1 may present a new therapy in treatment of respiratory diseases in near future. This review will focus on in vitro, animal and human evidences that strengthen the proposed role of TRPA1 in modulation of specific airway sensory responses and also on preclinical and clinical progress of selected TRPA1 antagonists.
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39
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Carletto L, Troncoso A, Rocha AC, Rumbus Z, Solymár M, Garami A. "Science without Borders" program and Brazilian-Hungarian collaboration in thermoregulation. Temperature (Austin) 2016; 2:455-6. [PMID: 27227065 PMCID: PMC4843935 DOI: 10.1080/23328940.2015.1109745] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Revised: 10/13/2015] [Accepted: 10/14/2015] [Indexed: 11/16/2022] Open
Affiliation(s)
- Luís Carletto
- Department of Pathophysiology and Gerontology; Medical School, University of Pécs; Pécs, Hungary; Medical School; Federal University of Paraná; Curitiba, Brazil
| | - Adam Troncoso
- Department of Pathophysiology and Gerontology; Medical School, University of Pécs; Pécs, Hungary; Medical School; Federal University of São Francisco Valley Foundation; Petrolina, Brazil
| | - Ana C Rocha
- Department of Pathophysiology and Gerontology; Medical School, University of Pécs; Pécs, Hungary; Medical School; Federal University of Alagoas; Maceió, Brazil
| | - Zoltán Rumbus
- Department of Pathophysiology and Gerontology; Medical School, University of Pécs ; Pécs, Hungary
| | - Margit Solymár
- Department of Pathophysiology and Gerontology; Medical School, University of Pécs ; Pécs, Hungary
| | - András Garami
- Department of Pathophysiology and Gerontology; Medical School, University of Pécs ; Pécs, Hungary
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40
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Schenkel LB, Olivieri PR, Boezio AA, Deak HL, Emkey R, Graceffa RF, Gunaydin H, Guzman-Perez A, Lee JH, Teffera Y, Wang W, Youngblood BD, Yu VL, Zhang M, Gavva NR, Lehto SG, Geuns-Meyer S. Optimization of a Novel Quinazolinone-Based Series of Transient Receptor Potential A1 (TRPA1) Antagonists Demonstrating Potent in Vivo Activity. J Med Chem 2016; 59:2794-809. [DOI: 10.1021/acs.jmedchem.6b00039] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Laurie B. Schenkel
- Departments of Medicinal Chemistry, ‡Lead Discovery, §Molecular Structure,
and ∥Pharmacokinetics
and Drug Metabolism, Amgen, Inc., 360 Binney Street, Cambridge, Massachusetts 02142, United States
- Neuroscience, Amgen, Inc., One Amgen Center Drive, Thousand Oaks, California 91320, United States
| | - Philip R. Olivieri
- Departments of Medicinal Chemistry, ‡Lead Discovery, §Molecular Structure,
and ∥Pharmacokinetics
and Drug Metabolism, Amgen, Inc., 360 Binney Street, Cambridge, Massachusetts 02142, United States
- Neuroscience, Amgen, Inc., One Amgen Center Drive, Thousand Oaks, California 91320, United States
| | - Alessandro A. Boezio
- Departments of Medicinal Chemistry, ‡Lead Discovery, §Molecular Structure,
and ∥Pharmacokinetics
and Drug Metabolism, Amgen, Inc., 360 Binney Street, Cambridge, Massachusetts 02142, United States
- Neuroscience, Amgen, Inc., One Amgen Center Drive, Thousand Oaks, California 91320, United States
| | - Holly L. Deak
- Departments of Medicinal Chemistry, ‡Lead Discovery, §Molecular Structure,
and ∥Pharmacokinetics
and Drug Metabolism, Amgen, Inc., 360 Binney Street, Cambridge, Massachusetts 02142, United States
- Neuroscience, Amgen, Inc., One Amgen Center Drive, Thousand Oaks, California 91320, United States
| | - Renee Emkey
- Departments of Medicinal Chemistry, ‡Lead Discovery, §Molecular Structure,
and ∥Pharmacokinetics
and Drug Metabolism, Amgen, Inc., 360 Binney Street, Cambridge, Massachusetts 02142, United States
- Neuroscience, Amgen, Inc., One Amgen Center Drive, Thousand Oaks, California 91320, United States
| | - Russell F. Graceffa
- Departments of Medicinal Chemistry, ‡Lead Discovery, §Molecular Structure,
and ∥Pharmacokinetics
and Drug Metabolism, Amgen, Inc., 360 Binney Street, Cambridge, Massachusetts 02142, United States
- Neuroscience, Amgen, Inc., One Amgen Center Drive, Thousand Oaks, California 91320, United States
| | - Hakan Gunaydin
- Departments of Medicinal Chemistry, ‡Lead Discovery, §Molecular Structure,
and ∥Pharmacokinetics
and Drug Metabolism, Amgen, Inc., 360 Binney Street, Cambridge, Massachusetts 02142, United States
- Neuroscience, Amgen, Inc., One Amgen Center Drive, Thousand Oaks, California 91320, United States
| | - Angel Guzman-Perez
- Departments of Medicinal Chemistry, ‡Lead Discovery, §Molecular Structure,
and ∥Pharmacokinetics
and Drug Metabolism, Amgen, Inc., 360 Binney Street, Cambridge, Massachusetts 02142, United States
- Neuroscience, Amgen, Inc., One Amgen Center Drive, Thousand Oaks, California 91320, United States
| | - Josie H. Lee
- Departments of Medicinal Chemistry, ‡Lead Discovery, §Molecular Structure,
and ∥Pharmacokinetics
and Drug Metabolism, Amgen, Inc., 360 Binney Street, Cambridge, Massachusetts 02142, United States
- Neuroscience, Amgen, Inc., One Amgen Center Drive, Thousand Oaks, California 91320, United States
| | - Yohannes Teffera
- Departments of Medicinal Chemistry, ‡Lead Discovery, §Molecular Structure,
and ∥Pharmacokinetics
and Drug Metabolism, Amgen, Inc., 360 Binney Street, Cambridge, Massachusetts 02142, United States
- Neuroscience, Amgen, Inc., One Amgen Center Drive, Thousand Oaks, California 91320, United States
| | - Weiya Wang
- Departments of Medicinal Chemistry, ‡Lead Discovery, §Molecular Structure,
and ∥Pharmacokinetics
and Drug Metabolism, Amgen, Inc., 360 Binney Street, Cambridge, Massachusetts 02142, United States
- Neuroscience, Amgen, Inc., One Amgen Center Drive, Thousand Oaks, California 91320, United States
| | - Beth D. Youngblood
- Departments of Medicinal Chemistry, ‡Lead Discovery, §Molecular Structure,
and ∥Pharmacokinetics
and Drug Metabolism, Amgen, Inc., 360 Binney Street, Cambridge, Massachusetts 02142, United States
- Neuroscience, Amgen, Inc., One Amgen Center Drive, Thousand Oaks, California 91320, United States
| | - Violeta L. Yu
- Departments of Medicinal Chemistry, ‡Lead Discovery, §Molecular Structure,
and ∥Pharmacokinetics
and Drug Metabolism, Amgen, Inc., 360 Binney Street, Cambridge, Massachusetts 02142, United States
- Neuroscience, Amgen, Inc., One Amgen Center Drive, Thousand Oaks, California 91320, United States
| | - Maosheng Zhang
- Departments of Medicinal Chemistry, ‡Lead Discovery, §Molecular Structure,
and ∥Pharmacokinetics
and Drug Metabolism, Amgen, Inc., 360 Binney Street, Cambridge, Massachusetts 02142, United States
- Neuroscience, Amgen, Inc., One Amgen Center Drive, Thousand Oaks, California 91320, United States
| | - Narender R. Gavva
- Departments of Medicinal Chemistry, ‡Lead Discovery, §Molecular Structure,
and ∥Pharmacokinetics
and Drug Metabolism, Amgen, Inc., 360 Binney Street, Cambridge, Massachusetts 02142, United States
- Neuroscience, Amgen, Inc., One Amgen Center Drive, Thousand Oaks, California 91320, United States
| | - Sonya G. Lehto
- Departments of Medicinal Chemistry, ‡Lead Discovery, §Molecular Structure,
and ∥Pharmacokinetics
and Drug Metabolism, Amgen, Inc., 360 Binney Street, Cambridge, Massachusetts 02142, United States
- Neuroscience, Amgen, Inc., One Amgen Center Drive, Thousand Oaks, California 91320, United States
| | - Stephanie Geuns-Meyer
- Departments of Medicinal Chemistry, ‡Lead Discovery, §Molecular Structure,
and ∥Pharmacokinetics
and Drug Metabolism, Amgen, Inc., 360 Binney Street, Cambridge, Massachusetts 02142, United States
- Neuroscience, Amgen, Inc., One Amgen Center Drive, Thousand Oaks, California 91320, United States
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Abstract
The detection of temperature is one of the most fundamental sensory functions across all species, and is critical for animal survival. Animals have thus evolved a diversity of thermosensory mechanisms allowing them to sense and respond to temperature changes (thermoreception). A key process underlying thermoreception is the translation of thermal energy into electrical signals, a process mediated by thermal sensors (thermoreceptors) that are sensitive to a specific range of temperatures. In disease conditions, the temperature sensitivity of thermoreceptors is altered, leading to abnormal temperature sensation such as heat hyperalgesia. Therefore, the identification of thermal sensors and understanding their functions and regulation hold great potential for developing novel therapeutics against many medical conditions such as pain.
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Affiliation(s)
- Xuming Zhang
- a Rowett Institute of Nutrition and Health & Institute of Medical Sciences ; University of Aberdeen , Foresterhill , Aberdeen , UK
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42
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Oda M, Kurogi M, Kubo Y, Saitoh O. Sensitivities of Two Zebrafish TRPA1 Paralogs to Chemical and Thermal Stimuli Analyzed in Heterologous Expression Systems. Chem Senses 2016; 41:261-72. [PMID: 26826723 DOI: 10.1093/chemse/bjv091] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/24/2015] [Indexed: 11/13/2022] Open
Abstract
Transient receptor potential A1 (TRPA1) is the only member of the mouse, chick, and frog TRPA family, whereas 2 paralogs (zTRPA1a and zTRPA1b) are present in zebrafish. We herein investigated functional differences in the 2 zebrafish TRPA1s. HEK293T cells were used as heterologous expression systems, and the sensitivities of these cells to 4 chemical irritants (allyl isothiocyanate [AITC], caffeine, auto-oxidized epigallocatechin gallate [EGCG], and hydrogen peroxide [H2O2]) were compared with Ca(2+) imaging techniques. Sensitivities to the activators for AITC, oxidized EGCG, and H2O2 were higher in cells expressing zTRPA1a than in those expressing zTRPA1b, whereas caffeine appeared to activate both cells equally. We also characterized the thermal sensitivity of Xenopus oocytes expressing each TRPA1 electrophysiologically using a 2-electrode voltage clamp. Although endogenous currents induced by a cold stimulation were observed in control oocytes in some batches, oocytes expressing zTRPA1b showed significantly stronger cold- and heat-induced responses. However, significant thermal activation was not observed in oocytes expressing zTRPA1a. The results obtained using in vitro expression systems suggest that zTRPA1a is specialized for chemical sensing, whereas zTRPA1b responds to thermal stimuli. Furthermore, characterization of the chimeric molecule of TRPA1a and 1b revealed the importance of the N-terminal region in chemical and thermal sensing by zTRPA1s.
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Affiliation(s)
- Mai Oda
- Department of Animal Bio-Science, Faculty of Bio-Science, Nagahama Institute of Bio-Science and Technology, 1266 Tamura-cho, Nagahama-shi, Shiga 526-0829, Japan
| | - Mako Kurogi
- Department of Animal Bio-Science, Faculty of Bio-Science, Nagahama Institute of Bio-Science and Technology, 1266 Tamura-cho, Nagahama-shi, Shiga 526-0829, Japan
| | - Yoshihiro Kubo
- Division of Biophysics and Neurobiology, Department of Molecular Physiology, National Institute for Physiological Sciences, Nishigohnaka38, Myodaiji, Okazaki, Aichi 444-8585, Japan and Department of Physiological Sciences, School of Life Science, The Graduate University for Advanced Studies (SOKENDAI), Hayama, Kanagawa 240-0155, Japan
| | - Osamu Saitoh
- Department of Animal Bio-Science, Faculty of Bio-Science, Nagahama Institute of Bio-Science and Technology, 1266 Tamura-cho, Nagahama-shi, Shiga 526-0829, Japan,
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43
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TRPA1 mediates the hypothermic action of acetaminophen. Sci Rep 2015; 5:12771. [PMID: 26227887 PMCID: PMC4533162 DOI: 10.1038/srep12771] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2015] [Accepted: 07/09/2015] [Indexed: 11/18/2022] Open
Abstract
Acetaminophen (APAP) is an effective antipyretic and one of the most commonly used analgesic drugs. Unlike antipyretic non-steroidal anti-inflammatory drugs, APAP elicits hypothermia in addition to its antipyretic effect. Here we have examined the mechanisms responsible for the hypothermic activity of APAP. Subcutaneous, but not intrathecal, administration of APAP elicited a dose dependent decrease in body temperature in wildtype mice. Hypothermia was abolished in mice pre-treated with resiniferatoxin to destroy or defunctionalize peripheral TRPV1-expressing terminals, but resistant to inhibition of cyclo-oxygenases. The hypothermic activity was independent of TRPV1 since APAP evoked hypothermia was identical in wildtype and Trpv1−/− mice, and not reduced by administration of a maximally effective dose of a TRPV1 antagonist. In contrast, a TRPA1 antagonist inhibited APAP induced hypothermia and APAP was without effect on body temperature in Trpa1−/− mice. In a model of yeast induced pyrexia, administration of APAP evoked a marked hypothermia in wildtype and Trpv1−/− mice, but only restored normal body temperature in Trpa1−/− and Trpa1−/−/Trpv1−/− mice. We conclude that TRPA1 mediates APAP evoked hypothermia.
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44
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Dirkes MC, van Gulik TM, Heger M. Survey and critical appraisal of pharmacological agents with potential thermo-modulatory properties in the context of artificially induced hypometabolism. J Clin Transl Res 2015; 1:6-21. [PMID: 30873441 PMCID: PMC6410648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2015] [Revised: 07/07/2015] [Accepted: 07/10/2015] [Indexed: 10/27/2022] Open
Abstract
A reduction in body temperature can be achieved by a downward adjustment of the termoneutral zone, a process also described as anapyrexia. Pharmacological induction of anapyrexia could enable numerous applications in medicine. However, little is known about the potential of pharmacological agents to induce anapyrexic signaling. Therefore, a review of literature was performed and over a thousand pharmacologically active compounds were analyzed for their ability to induce anapyrexia in animals. Based on this analysis, eight agents (helium, dimethyl sulfoxide, reserpine, (oxo)tremorine, pentobarbital, (chlor) promazine, insulin, and acetaminophen) were identified as potential anapyrexia-inducing compounds and discussed in detail. The translational pitfalls were also addressed for each candidate compound. Of the agents that were discussed, reserpine, (oxo)tremorine, and (chlor) promazine may possess true anapyrexic properties based on their ability to either affect the thermoneutral zone or its effectors and facilitate hypothermic signaling. However, these properties are currently not unequivocal and warrant further examination in the context of artificially-induced hypometabolism.
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Affiliation(s)
- Marcel C. Dirkes
- Department of Experimental Surgery, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands, Current affiliation: Philips Research, Eindhoven, the Netherlands
| | - Thomas M. van Gulik
- Department of Experimental Surgery, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands
| | - Michal Heger
- Department of Experimental Surgery, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands
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45
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Szolcsányi J. Effect of capsaicin on thermoregulation: an update with new aspects. Temperature (Austin) 2015; 2:277-96. [PMID: 27227029 PMCID: PMC4843897 DOI: 10.1080/23328940.2015.1048928] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2015] [Revised: 05/04/2015] [Accepted: 05/04/2015] [Indexed: 01/07/2023] Open
Abstract
Capsaicin, a selective activator of the chemo- and heat-sensitive transient receptor potential (TRP) V1 cation channel, has characteristic feature of causing long-term functional and structural impairment of neural elements supplied by TRPV1/capsaicin receptor. In mammals, systemic application of capsaicin induces complex heat-loss response characteristic for each species and avoidance of warm environment. Capsaicin activates cutaneous warm receptors and polymodal nociceptors but has no effect on cold receptors or mechanoreceptors. In this review, thermoregulatory features of capsaicin-pretreated rodents and TRPV1-mediated neural elements with innocuous heat sensitivity are summarized. Recent data support a novel hypothesis for the role of visceral warmth sensors in monitoring core body temperature. Furthermore, strong evidence suggests that central presynaptic nerve terminals of TRPV1-expressing cutaneous, thoracic and abdominal visceral receptors are activated by innocuous warmth stimuli and capsaicin. These responses are absent in TRPV1 knockout mice. Thermoregulatory disturbance induced by systemic capsaicin pretreatment lasts for months and is characterized by a normal body temperature at cool environment up to a total dose of 150 mg/kg s.c. Upward differential shift of set points for activation vasodilation, other heat-loss effectors and thermopreference develops. Avoidance of warm ambient temperature (35°C, 40°C) is severely impaired but thermopreference at cool ambient temperatures (Tas) are not altered. TRPV1 knockout or knockdown and genetically altered TRPV1, TRPV2 and TRPM8 knockout mice have normal core temperature in thermoneutral or cool environments, but the combined mutant mice have impaired regulation in warm or cold (4°C) environments. Several lines of evidence support that in the preoptic area warmth sensitive neurons are activated and desensitized by capsaicin, but morphological evidence for it is controversial. It is suggested that these neurons have also integrator function. Fever is enhanced in capsaicin-desensitized rats and the inhibition observed after pretreatment with low i.p. doses does not support in the light of their warmth sensitivity the concept that abdominal TRPV1-expressing nerve terminals serve as nonthermal chemosensors for reference signals in thermoregulation.
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Key Words
- (s)EPSC(s), (spontaneous) excitatory postsynaptic current(s)
- DRG, dorsal root ganglion (ganglia)
- EGFP, enhanced green fluorescent protein
- LC, locus coeruleus
- LPS, lipopolysaccharide
- NTS, nucleus of the solitary tract
- PG(s), prostaglandin(s)
- POA, the preoptic area (of the hypothalamus)
- RTX, resiniferatoxin
- TRP, transient receptor potential
- TRPM8
- TRPV1
- Ta(s), ambient temperature(s)
- Tr, rectal temperature
- Ts, skin temperature
- Tt, tail temperature
- capsaicin
- fever
- preoptic area
- thermoregulation
- visceral thermoreceptors
- warm receptors
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Affiliation(s)
- János Szolcsányi
- Department of Pharmacology and Pharmacotherapy; University Medical School of Pécs; Pécs, Hungary; Szentágothai Research Centre University of Pécs; Pécs, Hungary
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46
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Wang H, Siemens J. TRP ion channels in thermosensation, thermoregulation and metabolism. Temperature (Austin) 2015; 2:178-87. [PMID: 27227022 PMCID: PMC4843888 DOI: 10.1080/23328940.2015.1040604] [Citation(s) in RCA: 94] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2015] [Revised: 04/01/2015] [Accepted: 04/02/2015] [Indexed: 12/13/2022] Open
Abstract
In humans, the TRP superfamily of cation channels includes 27 related molecules that respond to a remarkable variety of chemical and physical stimuli. While physiological roles for many TRP channels remain unknown, over the past years several have been shown to function as molecular sensors in organisms ranging from yeast to humans. In particular, TRP channels are now known to constitute important components of sensory systems, where they participate in the detection or transduction of osmotic, mechanical, thermal, or chemosensory stimuli. We here summarize our current understanding of the role individual members of this versatile receptor family play in thermosensation and thermoregulation, and also touch upon their immerging role in metabolic control.
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Affiliation(s)
- Hong Wang
- Department of Pharmacology; University of Heidelberg ; Heidelberg, Germany
| | - Jan Siemens
- Department of Pharmacology; University of Heidelberg ; Heidelberg, Germany
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47
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Feketa VV, Marrelli SP. Induction of therapeutic hypothermia by pharmacological modulation of temperature-sensitive TRP channels: theoretical framework and practical considerations. Temperature (Austin) 2015; 2:244-57. [PMID: 27227027 PMCID: PMC4844121 DOI: 10.1080/23328940.2015.1024383] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2014] [Revised: 02/25/2015] [Accepted: 02/25/2015] [Indexed: 12/22/2022] Open
Abstract
Therapeutic hypothermia has emerged as a remarkably effective method of neuroprotection from ischemia and is being increasingly used in clinics. Accordingly, it is also a subject of considerable attention from a basic scientific research perspective. One of the fundamental problems, with which current studies are concerned, is the optimal method of inducing hypothermia. This review seeks to provide a broad theoretical framework for approaching this problem, and to discuss how a novel promising strategy of pharmacological modulation of the thermosensitive ion channels fits into this framework. Various physical, anatomical, physiological and molecular aspects of thermoregulation, which provide the foundation for this text, have been comprehensively reviewed and will not be discussed exhaustively here. Instead, the first part of the current review, which may be helpful for a broader readership outside of thermoregulation research, will build on this existing knowledge to outline possible opportunities and research directions aimed at controlling body temperature. The second part, aimed at a more specialist audience, will highlight the conceptual advantages and practical limitations of novel molecular agents targeting thermosensitive Transient Receptor Potential (TRP) channels in achieving this goal. Two particularly promising members of this channel family, namely TRP melastatin 8 (TRPM8) and TRP vanilloid 1 (TRPV1), will be discussed in greater detail.
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Key Words
- DMH, dorso-medial hypothalamus
- MPA, medial preoptic area of hypothalamus
- TRP, Transient Receptor Potential
- TRPA1, Transient Receptor Potential cation channel, subfamily A, member 1
- TRPM8, Transient Receptor Potential cation channel, subfamily M, member 8
- TRPV1, Transient Receptor Potential cation channel, subfamily V, member 1
- TRPV2, Transient Receptor Potential cation channel, subfamily V, member 2
- TRPV3, Transient Receptor Potential cation channel, subfamily V, member 3
- TRPV4, Transient Receptor Potential cation channel, subfamily V, member 4
- ThermoTRPs
- ThermoTRPs, Thermosensitive Transient Receptor Potential cation channels
- body temperature
- core temperature
- pharmacological hypothermia
- physical cooling
- rMR, rostral medullary raphe region
- therapeutic hypothermia
- thermopharmacology
- thermoregulation
- thermosensitive ion channels
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Affiliation(s)
- Viktor V Feketa
- Department of Molecular Physiology and Biophysics Graduate Program; Cardiovascular Sciences Track; Baylor College of Medicine , Houston, TX, USA
| | - Sean P Marrelli
- Department of Molecular Physiology and Biophysics Graduate Program; Cardiovascular Sciences Track; Baylor College of Medicine, Houston, TX, USA; Department of Anesthesiology; Baylor College of Medicine, Houston, TX, USA
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48
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Chen J, Hackos DH. TRPA1 as a drug target--promise and challenges. NAUNYN-SCHMIEDEBERG'S ARCHIVES OF PHARMACOLOGY 2015; 388:451-63. [PMID: 25640188 PMCID: PMC4359712 DOI: 10.1007/s00210-015-1088-3] [Citation(s) in RCA: 121] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Accepted: 01/12/2015] [Indexed: 12/25/2022]
Abstract
The transient receptor potential ankyrin 1 (TRPA1) channel is a nonselective cation channel belonging to the superfamily of transient receptor potential (TRP) channels. It is predominantly expressed in sensory neurons and serves as an irritant sensor for a plethora of electrophilic compounds. Recent studies suggest that TRPA1 is involved in pain, itch, and respiratory diseases, and TRPA1 antagonists have been actively pursued as therapeutic agents. Here, we review the recent progress, unsettled issues, and challenges in TRPA1 research and drug discovery.
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Affiliation(s)
- Jun Chen
- Department of Biochemical and Cellular Pharmacology, Genentech, South San Francisco, CA 94080 USA
| | - David H. Hackos
- Department of Neuroscience, Genentech, South San Francisco, CA 94080 USA
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49
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Romanovsky AA. Protecting western redcedar from deer browsing-with a passing reference to TRP channels. Temperature (Austin) 2015; 2:142-9. [PMID: 27227013 PMCID: PMC4843894 DOI: 10.1080/23328940.2015.1047078] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Revised: 04/28/2015] [Accepted: 04/28/2015] [Indexed: 10/31/2022] Open
Abstract
This editorial is about tree farming. It proposes to test in an experiment whether co-planting (in the same hole) western redcedar (WRC, Thuja plicata) with Sitka spruce (Picea sitchensis) protects WRC seedlings from wildlife browsing. This sustainable protection method is an alternative to the traditional use of mechanical devices and big-game repellents. Many repellents contain transient receptor potential (TRP) agonists, such as capsaicin, a TRP vanilloid-1 agonist. This editorial also delivers a puzzle: while herbivores avoid capsaicin, why do people living in hot climates consume large quantities of it (in chili peppers)?
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Affiliation(s)
- Andrej A Romanovsky
- FeverLab; Trauma Research; St. Joseph's Hospital and Medical Center; Phoenix, AZ, USA
- Tree Fever: Forestland Conservation and Development; Glendale, AZ, USA
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50
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Drew KL, Romanovsky AA, Stephen TKL, Tupone D, Williams RH. Future approaches to therapeutic hypothermia: a symposium report. Temperature (Austin) 2015; 2:168-71. [PMID: 27227020 PMCID: PMC4843898 DOI: 10.4161/23328940.2014.976512] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2014] [Revised: 10/09/2014] [Accepted: 10/09/2014] [Indexed: 12/22/2022] Open
Key Words
- A1AR
- AGS, arctic ground squirrel
- CE, capillary electrophoresis
- EEG,electroencephalogram
- FSCV, Fast scan cyclic voltammetry
- HPLC, high performance liquid chromatography
- ICV, intracerebroventricular
- TRPM8
- Tb, core body temperature
- adenosine
- capillary electrophoresis
- hibernation
- nNOS, neuronal nitric oxide synthase; NTS, nucleus tractus solitarii; TH, therapeutic hypothermia; TRP, transient receptor potential [channel(s)]; TRPM8, TRP melastatin-8
- nNOS/NK1
- targeted temperature management
- therapeutic hypothermia
- torpor
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Affiliation(s)
- Kelly L Drew
- Institute of Arctic Biology; University of Alaska Fairbanks; Fairbanks, AK, USA
| | - Andrej A Romanovsky
- Systemic Inflammation Laboratory (Fever Lab); Trauma Research, St. Joseph's Hospital and Medical Center; Phoenix, AZ, USA
| | - Terilyn KL Stephen
- Department of Chemistry and Biochemistry; University of Alaska Fairbanks; Fairbanks, AK, USA
| | - Domenico Tupone
- Department of Neurological Surgery; Oregon Health & Science University; Portland, OR, USA
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