1
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Arcas JM, Oudaha K, González A, Fernández-Trillo J, Peralta FA, Castro-Marsal J, Poyraz S, Taberner F, Sala S, de la Peña E, Gomis A, Viana F. The ion channel TRPM8 is a direct target of the immunosuppressant rapamycin in primary sensory neurons. Br J Pharmacol 2024; 181:3192-3214. [PMID: 38741464 DOI: 10.1111/bph.16402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 02/29/2024] [Accepted: 03/10/2024] [Indexed: 05/16/2024] Open
Abstract
BACKGROUND AND PURPOSE The mechanistic target of rapamycin (mTOR) signalling pathway is a key regulator of cell growth and metabolism. Its deregulation is implicated in several diseases. The macrolide rapamycin, a specific inhibitor of mTOR, has immunosuppressive, anti-inflammatory and antiproliferative properties. Recently, we identified tacrolimus, another macrolide immunosuppressant, as a novel activator of TRPM8 ion channels, involved in cold temperature sensing, thermoregulation, tearing and cold pain. We hypothesized that rapamycin may also have agonist activity on TRPM8 channels. EXPERIMENTAL APPROACH Using calcium imaging and electrophysiology in transfected HEK293 cells and wildtype or Trpm8 KO mouse DRG neurons, we characterized rapamycin's effects on TRPM8 channels. We also examined the effects of rapamycin on tearing in mice. KEY RESULTS Micromolar concentrations of rapamycin activated rat and mouse TRPM8 channels directly and potentiated cold-evoked responses, effects also observed in human TRPM8 channels. In cultured mouse DRG neurons, rapamycin increased intracellular calcium levels almost exclusively in cold-sensitive neurons. Responses were markedly decreased in Trpm8 KO mice or by TRPM8 channel antagonists. Cutaneous cold thermoreceptor endings were also activated by rapamycin. Topical application of rapamycin to the eye surface evokes tearing in mice by a TRPM8-dependent mechanism. CONCLUSION AND IMPLICATIONS These results identify TRPM8 cationic channels in sensory neurons as novel molecular targets of the immunosuppressant rapamycin. These findings may help explain some of its therapeutic effects after topical application to the skin and the eye surface. Moreover, rapamycin could be used as an experimental tool in the clinic to explore cold thermoreceptors.
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Affiliation(s)
- José Miguel Arcas
- Instituto de Neurociencias, Universidad Miguel Hernández-CSIC, San Juan de Alicante, Spain
| | - Khalid Oudaha
- Instituto de Neurociencias, Universidad Miguel Hernández-CSIC, San Juan de Alicante, Spain
| | - Alejandro González
- Instituto de Neurociencias, Universidad Miguel Hernández-CSIC, San Juan de Alicante, Spain
| | - Jorge Fernández-Trillo
- Instituto de Neurociencias, Universidad Miguel Hernández-CSIC, San Juan de Alicante, Spain
| | | | - Júlia Castro-Marsal
- Instituto de Neurociencias, Universidad Miguel Hernández-CSIC, San Juan de Alicante, Spain
| | - Seyma Poyraz
- Instituto de Neurociencias, Universidad Miguel Hernández-CSIC, San Juan de Alicante, Spain
| | - Francisco Taberner
- Instituto de Neurociencias, Universidad Miguel Hernández-CSIC, San Juan de Alicante, Spain
| | - Salvador Sala
- Instituto de Neurociencias, Universidad Miguel Hernández-CSIC, San Juan de Alicante, Spain
| | - Elvira de la Peña
- Instituto de Neurociencias, Universidad Miguel Hernández-CSIC, San Juan de Alicante, Spain
| | - Ana Gomis
- Instituto de Neurociencias, Universidad Miguel Hernández-CSIC, San Juan de Alicante, Spain
| | - Félix Viana
- Instituto de Neurociencias, Universidad Miguel Hernández-CSIC, San Juan de Alicante, Spain
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2
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Huffer K, Denley MC, Oskoui EV, Swartz KJ. Conservation of the cooling agent binding pocket within the TRPM subfamily. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.05.20.595003. [PMID: 38826484 PMCID: PMC11142142 DOI: 10.1101/2024.05.20.595003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2024]
Abstract
Transient Receptor Potential (TRP) channels are a large and diverse family of tetrameric cation selective channels that are activated by many different types of stimuli, including noxious heat or cold, organic ligands such as vanilloids or cooling agents, or intracellular Ca2+. Structures available for all subtypes of TRP channels reveal that the transmembrane domains are closely related despite their unique sensitivity to activating stimuli. Here we use computational and electrophysiological approaches to explore the conservation of the cooling agent binding pocket identified within the S1-S4 domain of the Melastatin subfamily member TRPM8, the mammalian sensor of noxious cold, with other TRPM channel subtypes. We find that a subset of TRPM channels, including TRPM2, TRPM4 and TRPM5, contain pockets very similar to the cooling agent binding pocket in TRPM8. We then show how the cooling agent icilin modulates activation of TRPM4 to intracellular Ca2+, enhancing the sensitivity of the channel to Ca2+ and diminishing outward-rectification to promote opening at negative voltages. Mutations known to promote or diminish activation of TRPM8 by cooling agents similarly alter activation of TRPM4 by icilin, suggesting that icilin binds to the cooling agent binding pocket to promote opening of the channel. These findings demonstrate that TRPM4 and TRPM8 channels share related ligand binding pockets that are allosterically coupled to opening of the pore.
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Affiliation(s)
- Kate Huffer
- Molecular Physiology and Biophysics Section, Porter Neuroscience Research Center, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20892
| | - Matthew C.S. Denley
- Molecular Physiology and Biophysics Section, Porter Neuroscience Research Center, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20892
| | - Elisabeth V. Oskoui
- Molecular Physiology and Biophysics Section, Porter Neuroscience Research Center, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20892
- Present Address: Imperial College London, Exhibition Rd, South Kensington, London SW7 2AZ, UK
| | - Kenton J. Swartz
- Molecular Physiology and Biophysics Section, Porter Neuroscience Research Center, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20892
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3
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Luu DD, Ramesh N, Kazan IC, Shah KH, Lahiri G, Mana MD, Ozkan SB, Van Horn WD. Evidence that the cold- and menthol-sensing functions of the human TRPM8 channel evolved separately. SCIENCE ADVANCES 2024; 10:eadm9228. [PMID: 38905339 PMCID: PMC11192081 DOI: 10.1126/sciadv.adm9228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Accepted: 05/16/2024] [Indexed: 06/23/2024]
Abstract
Transient receptor potential melastatin 8 (TRPM8) is a temperature- and menthol-sensitive ion channel that contributes to diverse physiological roles, including cold sensing and pain perception. Clinical trials targeting TRPM8 have faced repeated setbacks predominantly due to the knowledge gap in unraveling the molecular underpinnings governing polymodal activation. A better understanding of the molecular foundations between the TRPM8 activation modes may aid the development of mode-specific, thermal-neutral therapies. Ancestral sequence reconstruction was used to explore the origins of TRPM8 activation modes. By resurrecting key TRPM8 nodes along the human evolutionary trajectory, we gained valuable insights into the trafficking, stability, and function of these ancestral forms. Notably, this approach unveiled the differential emergence of cold and menthol sensitivity over evolutionary time, providing a fresh perspective on complex polymodal behavior. These studies provide a paradigm for understanding polymodal behavior in TRPM8 and other proteins with the potential to enhance our understanding of sensory receptor biology and pave the way for innovative therapeutic interventions.
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Affiliation(s)
- Dustin D. Luu
- School of Molecular Sciences and The Virginia G. Piper Biodesign Center for Personalized Diagnostics, The Biodesign Institute, Arizona State University, Tempe, AZ, USA
| | - Nikhil Ramesh
- Department of Physics and Center for Biological Physics, Arizona State University, Tempe, AZ, USA
| | - I. Can Kazan
- Department of Physics and Center for Biological Physics, Arizona State University, Tempe, AZ, USA
| | - Karan H. Shah
- School of Molecular Sciences and The Virginia G. Piper Biodesign Center for Personalized Diagnostics, The Biodesign Institute, Arizona State University, Tempe, AZ, USA
| | - Gourab Lahiri
- School of Life Sciences, Arizona State University, Tempe, AZ, USA
| | - Miyeko D. Mana
- School of Life Sciences, Arizona State University, Tempe, AZ, USA
| | - S. Banu Ozkan
- Department of Physics and Center for Biological Physics, Arizona State University, Tempe, AZ, USA
| | - Wade D. Van Horn
- School of Molecular Sciences and The Virginia G. Piper Biodesign Center for Personalized Diagnostics, The Biodesign Institute, Arizona State University, Tempe, AZ, USA
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4
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Gou R, Liu Y, Gou L, Mi S, Li X, Yang Y, Cheng X, Zhang Y. Transient Receptor Potential Channels in Sensory Mechanisms of the Lower Urinary Tract. Urol Int 2024; 108:464-476. [PMID: 38657590 DOI: 10.1159/000538855] [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: 10/10/2023] [Accepted: 04/03/2024] [Indexed: 04/26/2024]
Abstract
BACKGROUND Urine storage and excretion require a network of interactions in the urinary tract and the central nervous system, which is mediated by a reservoir of water in the bladder and the outlet to the bladder neck, urethra, and external urethral sphincter. Through communicating and coordinating each other, micturition system eventually showed a switch-like activity pattern. SUMMARY At cervicothoracic and lumbosacral spine, the spinal reflex pathway of the lower urinary tract (LUT) received mechanosensory input from the urothelium to regulate the bladder contraction activity, thereby controlled urination voluntarily. Impairment of above-mentioned any level could result in lower urinary tract dysfunction, placed a huge burden on patients and society. Specific expression of purinergic receptors and transient receptor potential (TRP) channels are thought to play an important role in urinary excretion in the LUT. KEY MESSAGES This article reviewed the knowledge about the voiding reflex and described the role and function of TRP channels during voiding.
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Affiliation(s)
- Ruiqiang Gou
- The First Clinical Medical College, Lanzhou University, Lanzhou, China,
| | - Yuanyuan Liu
- The First Clinical Medical College, Lanzhou University, Lanzhou, China
| | - Li Gou
- The First Clinical Medical College, Lanzhou University, Lanzhou, China
| | - Shengyan Mi
- The First Clinical Medical College, Lanzhou University, Lanzhou, China
| | - Xiaonan Li
- The First Clinical Medical College, Lanzhou University, Lanzhou, China
| | - Yichen Yang
- The First Clinical Medical College, Lanzhou University, Lanzhou, China
| | - Xiaorong Cheng
- The Second Hospital and Clinical Medical School, Lanzhou University, Lanzhou, China
| | - Yibao Zhang
- The Second Hospital and Clinical Medical School, Lanzhou University, Lanzhou, China
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5
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Jojoa-Cruz S, Dubin AE, Lee WH, Ward AB. Structure-guided mutagenesis of OSCAs reveals differential activation to mechanical stimuli. eLife 2024; 12:RP93147. [PMID: 38592763 PMCID: PMC11003742 DOI: 10.7554/elife.93147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/10/2024] Open
Abstract
The dimeric two-pore OSCA/TMEM63 family has recently been identified as mechanically activated ion channels. Previously, based on the unique features of the structure of OSCA1.2, we postulated the potential involvement of several structural elements in sensing membrane tension (Jojoa-Cruz et al., 2018). Interestingly, while OSCA1, 2, and 3 clades are activated by membrane stretch in cell-attached patches (i.e. they are stretch-activated channels), they differ in their ability to transduce membrane deformation induced by a blunt probe (poking). Here, in an effort to understand the domains contributing to mechanical signal transduction, we used cryo-electron microscopy to solve the structure of Arabidopsis thaliana (At) OSCA3.1, which, unlike AtOSCA1.2, only produced stretch- but not poke-activated currents in our initial characterization (Murthy et al., 2018). Mutagenesis and electrophysiological assessment of conserved and divergent putative mechanosensitive features of OSCA1.2 reveal a selective disruption of the macroscopic currents elicited by poking without considerable effects on stretch-activated currents (SAC). Our results support the involvement of the amphipathic helix and lipid-interacting residues in the membrane fenestration in the response to poking. Our findings position these two structural elements as potential sources of functional diversity within the family.
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Affiliation(s)
- Sebastian Jojoa-Cruz
- Department of Integrative Structural and Computational Biology, Scripps ResearchLa JollaUnited States
| | - Adrienne E Dubin
- Department of Integrative Structural and Computational Biology, Scripps ResearchLa JollaUnited States
- Department of Neuroscience, Scripps ResearchLa JollaUnited States
| | - Wen-Hsin Lee
- Department of Integrative Structural and Computational Biology, Scripps ResearchLa JollaUnited States
| | - Andrew B Ward
- Department of Integrative Structural and Computational Biology, Scripps ResearchLa JollaUnited States
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6
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Jojoa-Cruz S, Dubin AE, Lee WH, Ward A. Structure-guided mutagenesis of OSCAs reveals differential activation to mechanical stimuli. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2023.10.03.560740. [PMID: 37873218 PMCID: PMC10592937 DOI: 10.1101/2023.10.03.560740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2023]
Abstract
The dimeric two-pore OSCA/TMEM63 family has recently been identified as mechanically activated ion channels. Previously, based on the unique features of the structure of OSCA1.2, we postulated the potential involvement of several structural elements in sensing membrane tension1. Interestingly, while OSCA1, 2, and 3 clades are activated by membrane stretch in cell-attached patches (i.e., they are stretch-activated channels), they differ in their ability to transduce membrane deformation induced by a blunt probe (poking). In an effort to understand the domains contributing to mechanical signal transduction, we used cryo-electron microscopy to solve the structure of Arabidopsis thaliana (At) OSCA3.1, which, unlike AtOSCA1.2, only produced stretch- but not poke-activated currents in our initial characterization2. Mutagenesis and electrophysiological assessment of conserved and divergent putative mechanosensitive features of OSCA1.2 reveal a selective disruption of the macroscopic currents elicited by poking without considerable effects on stretch-activated currents (SAC). Our results support the involvement of the amphipathic helix and lipid-interacting residues in the membrane fenestration in the response to poking. Our findings position these two structural elements as potential sources of functional diversity within the family.
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Affiliation(s)
- Sebastian Jojoa-Cruz
- Department of Integrative Structural and Computational Biology, Scripps Research, La Jolla, California 92037, USA
| | - Adrienne E. Dubin
- Department of Neuroscience, Scripps Research, La Jolla, California 92037, USA
| | - Wen-Hsin Lee
- Department of Integrative Structural and Computational Biology, Scripps Research, La Jolla, California 92037, USA
| | - Andrew Ward
- Department of Integrative Structural and Computational Biology, Scripps Research, La Jolla, California 92037, USA
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7
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Selescu T, Bivoleanu RA, Iodi Carstens M, Manolache A, Caragea VM, Hutanu DE, Meerupally R, Wei ET, Carstens E, Zimmermann K, Babes A. TRPM8-dependent shaking in mammals and birds. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2023.12.27.573364. [PMID: 38234797 PMCID: PMC10793462 DOI: 10.1101/2023.12.27.573364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2024]
Abstract
Removing water from wet fur or feathers is important for thermoregulation in warm-blooded animals. The "wet dog shake" (WDS) behavior has been largely characterized in mammals but to a much lesser extent in birds. Although it is known that TRPM8 is the main molecular transducer of low temperature in mammals, it is not clear if wetness-induced shaking in furred and feathered animals is dependent on TRPM8. Here, we show that a novel TRPM8 agonist induces WDS in rodents and, importantly, in birds, similar to the shaking behavior evoked by water-spraying. Furthermore, the WDS onset depends on TRPM8, as we show in water-sprayed mice. Overall, our results provide multiple evidence for a TRPM8 dependence of WDS behaviors in all tested species. These suggest that a convergent evolution selected similar shaking behaviors to expel water from fur and feathers, with TRPM8 being involved in wetness sensing in both mammals and birds.
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8
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Palchevskyi S, Czarnocki-Cieciura M, Vistoli G, Gervasoni S, Nowak E, Beccari AR, Nowotny M, Talarico C. Structure of human TRPM8 channel. Commun Biol 2023; 6:1065. [PMID: 37857704 PMCID: PMC10587237 DOI: 10.1038/s42003-023-05425-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Accepted: 10/05/2023] [Indexed: 10/21/2023] Open
Abstract
TRPM8 is a non-selective cation channel permeable to both monovalent and divalent cations that is activated by multiple factors, such as temperature, voltage, pressure, and changes in osmolality. It is a therapeutic target for anticancer drug development, and its modulators can be utilized for several pathological conditions. Here, we present a cryo-electron microscopy structure of a human TRPM8 channel in the closed state that was solved at 2.7 Å resolution. Our structure comprises the most complete model of the N-terminal pre-melastatin homology region. We also visualized several lipids that are bound by the protein and modeled how the human channel interacts with icilin. Analyses of pore helices in available TRPM structures showed that all these structures can be grouped into different closed, desensitized and open state conformations based on the register of the pore helix S6 which positions particular amino acid residues at the channel constriction.
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Affiliation(s)
- Sergii Palchevskyi
- Laboratory of Protein Structure, International Institute of Molecular and Cell Biology in Warsaw, 02-109, Warsaw, Poland
- Cell Signalling Department, Institute of Molecular Biology and Genetics NASU, 03143, Kyiv, Ukraine
| | - Mariusz Czarnocki-Cieciura
- Laboratory of Protein Structure, International Institute of Molecular and Cell Biology in Warsaw, 02-109, Warsaw, Poland
| | - Giulio Vistoli
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, Via Mangiagalli, 25, I-20133, Milano, Italy
| | - Silvia Gervasoni
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, Via Mangiagalli, 25, I-20133, Milano, Italy
- Department of Physics, University of Cagliari, I-09042, Monserrato, Italy
| | - Elżbieta Nowak
- Laboratory of Protein Structure, International Institute of Molecular and Cell Biology in Warsaw, 02-109, Warsaw, Poland
| | - Andrea R Beccari
- Dompé Farmaceutici SpA, EXSCALATE, Via Tommaso De Amicis, 95, I-80131, Napoli, Italy
| | - Marcin Nowotny
- Laboratory of Protein Structure, International Institute of Molecular and Cell Biology in Warsaw, 02-109, Warsaw, Poland.
| | - Carmine Talarico
- Dompé Farmaceutici SpA, EXSCALATE, Via Tommaso De Amicis, 95, I-80131, Napoli, Italy.
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9
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Jesus RLC, Araujo FA, Alves QL, Dourado KC, Silva DF. Targeting temperature-sensitive transient receptor potential channels in hypertension: far beyond the perception of hot and cold. J Hypertens 2023; 41:1351-1370. [PMID: 37334542 DOI: 10.1097/hjh.0000000000003487] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/20/2023]
Abstract
Transient receptor potential (TRP) channels are nonselective cation channels and participate in various physiological roles. Thus, changes in TRP channel function or expression have been linked to several disorders. Among the many TRP channel subtypes, the TRP ankyrin type 1 (TRPA1), TRP melastatin type 8 (TRPM8), and TRP vanilloid type 1 (TRPV1) channels are temperature-sensitive and recognized as thermo-TRPs, which are expressed in the primary afferent nerve. Thermal stimuli are converted into neuronal activity. Several studies have described the expression of TRPA1, TRPM8, and TRPV1 in the cardiovascular system, where these channels can modulate physiological and pathological conditions, including hypertension. This review provides a complete understanding of the functional role of the opposing thermo-receptors TRPA1/TRPM8/TRPV1 in hypertension and a more comprehensive appreciation of TRPA1/TRPM8/TRPV1-dependent mechanisms involved in hypertension. These channels varied activation and inactivation have revealed a signaling pathway that may lead to innovative future treatment options for hypertension and correlated vascular diseases.
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Affiliation(s)
- Rafael Leonne C Jesus
- Laboratory of Cardiovascular Physiology and Pharmacology, Federal University of Bahia, Salvador
| | - Fênix A Araujo
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation - FIOCRUZ, Bahia, Brazil
| | - Quiara L Alves
- Laboratory of Cardiovascular Physiology and Pharmacology, Federal University of Bahia, Salvador
| | - Keina C Dourado
- Laboratory of Cardiovascular Physiology and Pharmacology, Federal University of Bahia, Salvador
| | - Darizy F Silva
- Laboratory of Cardiovascular Physiology and Pharmacology, Federal University of Bahia, Salvador
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation - FIOCRUZ, Bahia, Brazil
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10
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Moccia F, Fiorio Pla A, Lim D, Lodola F, Gerbino A. Intracellular Ca 2+ signalling: unexpected new roles for the usual suspect. Front Physiol 2023; 14:1210085. [PMID: 37576340 PMCID: PMC10413985 DOI: 10.3389/fphys.2023.1210085] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Accepted: 07/18/2023] [Indexed: 08/15/2023] Open
Abstract
Cytosolic Ca2+ signals are organized in complex spatial and temporal patterns that underlie their unique ability to regulate multiple cellular functions. Changes in intracellular Ca2+ concentration ([Ca2+]i) are finely tuned by the concerted interaction of membrane receptors and ion channels that introduce Ca2+ into the cytosol, Ca2+-dependent sensors and effectors that translate the elevation in [Ca2+]i into a biological output, and Ca2+-clearing mechanisms that return the [Ca2+]i to pre-stimulation levels and prevent cytotoxic Ca2+ overload. The assortment of the Ca2+ handling machinery varies among different cell types to generate intracellular Ca2+ signals that are selectively tailored to subserve specific functions. The advent of novel high-speed, 2D and 3D time-lapse imaging techniques, single-wavelength and genetic Ca2+ indicators, as well as the development of novel genetic engineering tools to manipulate single cells and whole animals, has shed novel light on the regulation of cellular activity by the Ca2+ handling machinery. A symposium organized within the framework of the 72nd Annual Meeting of the Italian Society of Physiology, held in Bari on 14-16th September 2022, has recently addressed many of the unexpected mechanisms whereby intracellular Ca2+ signalling regulates cellular fate in healthy and disease states. Herein, we present a report of this symposium, in which the following emerging topics were discussed: 1) Regulation of water reabsorption in the kidney by lysosomal Ca2+ release through Transient Receptor Potential Mucolipin 1 (TRPML1); 2) Endoplasmic reticulum-to-mitochondria Ca2+ transfer in Alzheimer's disease-related astroglial dysfunction; 3) The non-canonical role of TRP Melastatin 8 (TRPM8) as a Rap1A inhibitor in the definition of some cancer hallmarks; and 4) Non-genetic optical stimulation of Ca2+ signals in the cardiovascular system.
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Affiliation(s)
- Francesco Moccia
- Laboratory of General Physiology, Department of Biology and Biotechnology “L. Spallanzani”, University of Pavia, Pavia, Italy
| | | | - Dmitry Lim
- Department of Pharmaceutical Sciences, Università del Piemonte Orientale “Amedeo Avogadro”, Novara, Italy
| | - Francesco Lodola
- Department of Biotechnology and Biosciences, University of Milan-Bicocca, Milan, Italy
- Center for Nano Science and Technology @PoliMi, Istituto Italiano di Tecnologia, Milan, Italy
| | - Andrea Gerbino
- Department of Biosciences, Biotechnologies and Environment, University of Bari Aldo Moro, Bari, Italy
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11
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Zhang M, Ma Y, Ye X, Zhang N, Pan L, Wang B. TRP (transient receptor potential) ion channel family: structures, biological functions and therapeutic interventions for diseases. Signal Transduct Target Ther 2023; 8:261. [PMID: 37402746 DOI: 10.1038/s41392-023-01464-x] [Citation(s) in RCA: 59] [Impact Index Per Article: 59.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 03/26/2023] [Accepted: 04/25/2023] [Indexed: 07/06/2023] Open
Abstract
Transient receptor potential (TRP) channels are sensors for a variety of cellular and environmental signals. Mammals express a total of 28 different TRP channel proteins, which can be divided into seven subfamilies based on amino acid sequence homology: TRPA (Ankyrin), TRPC (Canonical), TRPM (Melastatin), TRPML (Mucolipin), TRPN (NO-mechano-potential, NOMP), TRPP (Polycystin), TRPV (Vanilloid). They are a class of ion channels found in numerous tissues and cell types and are permeable to a wide range of cations such as Ca2+, Mg2+, Na+, K+, and others. TRP channels are responsible for various sensory responses including heat, cold, pain, stress, vision and taste and can be activated by a number of stimuli. Their predominantly location on the cell surface, their interaction with numerous physiological signaling pathways, and the unique crystal structure of TRP channels make TRPs attractive drug targets and implicate them in the treatment of a wide range of diseases. Here, we review the history of TRP channel discovery, summarize the structures and functions of the TRP ion channel family, and highlight the current understanding of the role of TRP channels in the pathogenesis of human disease. Most importantly, we describe TRP channel-related drug discovery, therapeutic interventions for diseases and the limitations of targeting TRP channels in potential clinical applications.
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Affiliation(s)
- Miao Zhang
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
- Experiment Center for Science and Technology, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
- The Center for Microbes, Development and Health; Key Laboratory of Molecular Virology and Immunology, Institut Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai, 200031, China
| | - Yueming Ma
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Xianglu Ye
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Ning Zhang
- Experiment Center for Science and Technology, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China.
| | - Lei Pan
- The Center for Microbes, Development and Health; Key Laboratory of Molecular Virology and Immunology, Institut Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai, 200031, China.
- CAS Center for Excellence in Biotic Interactions, University of Chinese Academy of Sciences, Beijing, 100049, China.
| | - Bing Wang
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China.
- Center for Pharmaceutics Research, Shanghai Institute of Materia Medica Chinese Academy of Sciences, Shanghai, 201203, China.
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12
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Pertusa M, Solorza J, Madrid R. Molecular determinants of TRPM8 function: key clues for a cool modulation. Front Pharmacol 2023; 14:1213337. [PMID: 37388453 PMCID: PMC10301734 DOI: 10.3389/fphar.2023.1213337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Accepted: 05/30/2023] [Indexed: 07/01/2023] Open
Abstract
Cold thermoreceptor neurons detect temperature drops with highly sensitive molecular machinery concentrated in their peripheral free nerve endings. The main molecular entity responsible for cold transduction in these neurons is the thermo-TRP channel TRPM8. Cold, cooling compounds such as menthol, voltage, and osmolality rises activate this polymodal ion channel. Dysregulation of TRPM8 activity underlies several physiopathological conditions, including painful cold hypersensitivity in response to axonal damage, migraine, dry-eye disease, overactive bladder, and several forms of cancer. Although TRPM8 could be an attractive target for treating these highly prevalent diseases, there is still a need for potent and specific modulators potentially suitable for future clinical trials. This goal requires a complete understanding of the molecular determinants underlying TRPM8 activation by chemical and physical agonists, inhibition by antagonists, and the modulatory mechanisms behind its function to guide future and more successful treatment strategies. This review recapitulates information obtained from different mutagenesis approaches that have allowed the identification of specific amino acids in the cavity comprised of the S1-S4 and TRP domains that determine modulation by chemical ligands. In addition, we summarize different studies revealing specific regions within the N- and C-terminus and the transmembrane domain that contribute to cold-dependent TRPM8 gating. We also highlight the latest milestone in the field: cryo-electron microscopy structures of TRPM8, which have provided a better comprehension of the 21 years of extensive research in this ion channel, shedding light on the molecular bases underlying its modulation, and promoting the future rational design of novel drugs to selectively regulate abnormal TRPM8 activity under pathophysiological conditions.
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Affiliation(s)
- María Pertusa
- Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile
- Millennium Nucleus of Ion Channel-Associated Diseases (MiNICAD), Santiago, Chile
- Millennium Nucleus for the Study of Pain (MiNuSPain), Santiago, Chile
| | - Jocelyn Solorza
- Millennium Nucleus of Ion Channel-Associated Diseases (MiNICAD), Santiago, Chile
- Centro de Bioinformática, Simulación y Modelado (CBSM), Facultad de Ingeniería, Universidad de Talca, Talca, Chile
| | - Rodolfo Madrid
- Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile
- Millennium Nucleus of Ion Channel-Associated Diseases (MiNICAD), Santiago, Chile
- Millennium Nucleus for the Study of Pain (MiNuSPain), Santiago, Chile
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13
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Oh SJ, Lim JY, Son MK, Ahn JH, Song KH, Lee HJ, Kim S, Cho EH, Chung JY, Cho H, Kim H, Kim JH, Park J, Choi J, Hwang SW, Kim TW. TRPV1 inhibition overcomes cisplatin resistance by blocking autophagy-mediated hyperactivation of EGFR signaling pathway. Nat Commun 2023; 14:2691. [PMID: 37165076 PMCID: PMC10172196 DOI: 10.1038/s41467-023-38318-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Accepted: 04/25/2023] [Indexed: 05/12/2023] Open
Abstract
Cisplatin resistance along with chemotherapy-induced neuropathic pain is an important cause of treatment failure for many cancer types and represents an unmet clinical need. Therefore, future studies should provide evidence regarding the mechanisms of potential targets that can overcome the resistance as well as alleviate pain. Here, we show that the emergence of cisplatin resistance is highly associated with EGFR hyperactivation, and that EGFR hyperactivation is arisen by a transcriptional increase in the pain-generating channel, TRPV1, via NANOG. Furthermore, TRPV1 promotes autophagy-mediated EGF secretion via Ca2+ influx, which activates the EGFR-AKT signaling and, consequentially, the acquisition of cisplatin resistance. Importantly, TRPV1 inhibition renders tumors susceptible to cisplatin. Thus, our findings indicate a link among cisplatin resistance, EGFR hyperactivation, and TRPV1-mediated autophagic secretion, and implicate that TRPV1 could be a crucial drug target that could not only overcome cisplatin resistance but also alleviate pain in NANOG+ cisplatin-resistant cancer.
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Affiliation(s)
- Se Jin Oh
- BK21 Graduate Program, Department of Biomedical Sciences, Korea University College of Medicine, Seoul, 02841, Republic of Korea
- Department of Biochemistry and Molecular Biology, Korea University College of Medicine, Seoul, 02841, Republic of Korea
| | - Ji Yeon Lim
- BK21 Graduate Program, Department of Biomedical Sciences, Korea University College of Medicine, Seoul, 02841, Republic of Korea
- Department of Physiology, Korea University College of Medicine, Seoul, 02841, Republic of Korea
| | - Min Kyu Son
- BK21 Graduate Program, Department of Biomedical Sciences, Korea University College of Medicine, Seoul, 02841, Republic of Korea
- Department of Biochemistry and Molecular Biology, Korea University College of Medicine, Seoul, 02841, Republic of Korea
| | - Jun Hyeok Ahn
- BK21 Graduate Program, Department of Biomedical Sciences, Korea University College of Medicine, Seoul, 02841, Republic of Korea
- Department of Biochemistry and Molecular Biology, Korea University College of Medicine, Seoul, 02841, Republic of Korea
| | - Kwon-Ho Song
- Department of Cell biology, Daegu Catholic University School of Medicine, Daegu, 42472, Republic of Korea
| | - Hyo-Jung Lee
- BK21 Graduate Program, Department of Biomedical Sciences, Korea University College of Medicine, Seoul, 02841, Republic of Korea
- Department of Biochemistry and Molecular Biology, Korea University College of Medicine, Seoul, 02841, Republic of Korea
| | - Suyeon Kim
- BK21 Graduate Program, Department of Biomedical Sciences, Korea University College of Medicine, Seoul, 02841, Republic of Korea
- Department of Biochemistry and Molecular Biology, Korea University College of Medicine, Seoul, 02841, Republic of Korea
| | - Eun Ho Cho
- BK21 Graduate Program, Department of Biomedical Sciences, Korea University College of Medicine, Seoul, 02841, Republic of Korea
- Department of Biochemistry and Molecular Biology, Korea University College of Medicine, Seoul, 02841, Republic of Korea
| | - Joon-Yong Chung
- Molecular Imaging Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Hanbyoul Cho
- Department of Obstetrics and Gynecology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, 06273, Republic of Korea
| | - Hyosun Kim
- Department of Obstetrics and Gynecology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, 06273, Republic of Korea
| | - Jae-Hoon Kim
- Department of Obstetrics and Gynecology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, 06273, Republic of Korea
| | - Jooyoung Park
- Department of Biomedical Sciences, Korea University College of Medicine, Seoul, 02841, Republic of Korea
| | - Jungmin Choi
- Department of Biomedical Sciences, Korea University College of Medicine, Seoul, 02841, Republic of Korea
| | - Sun Wook Hwang
- BK21 Graduate Program, Department of Biomedical Sciences, Korea University College of Medicine, Seoul, 02841, Republic of Korea
- Department of Physiology, Korea University College of Medicine, Seoul, 02841, Republic of Korea
| | - Tae Woo Kim
- BK21 Graduate Program, Department of Biomedical Sciences, Korea University College of Medicine, Seoul, 02841, Republic of Korea.
- Department of Biochemistry and Molecular Biology, Korea University College of Medicine, Seoul, 02841, Republic of Korea.
- NEX-I Inc., Seoul, 05854, Republic of Korea.
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14
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Ochoa SV, Casas Z, Albarracín SL, Sutachan JJ, Torres YP. Therapeutic potential of TRPM8 channels in cancer treatment. Front Pharmacol 2023; 14:1098448. [PMID: 37033630 PMCID: PMC10073478 DOI: 10.3389/fphar.2023.1098448] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Accepted: 02/20/2023] [Indexed: 04/11/2023] Open
Abstract
Cancer is a multifactorial process associated with changes in signaling pathways leading to cell cycle variations and gene expression. The transient receptor potential melastatin 8 (TRPM8) channel is a non-selective cation channel expressed in neuronal and non-neuronal tissues, where it is involved in several processes, including thermosensation, differentiation, and migration. Cancer is a multifactorial process associated with changes in signaling pathways leading to variations in cell cycle and gene expression. Interestingly, it has been shown that TRPM8 channels also participate in physiological processes related to cancer, such as proliferation, survival, and invasion. For instance, TRPM8 channels have an important role in the diagnosis, prognosis, and treatment of prostate cancer. In addition, it has been reported that TRPM8 channels are involved in the progress of pancreatic, breast, bladder, colon, gastric, and skin cancers, glioblastoma, and neuroblastoma. In this review, we summarize the current knowledge on the role of TRPM8 channels in cancer progression. We also discuss the therapeutic potential of TRPM8 in carcinogenesis, which has been proposed as a molecular target for cancer therapy.
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Affiliation(s)
- Sara V. Ochoa
- Departamento de Nutrición y Bioquímica, Pontificia Universidad Javeriana, Bogotá, Colombia
- Semillero de Investigación, Biofísica y Fisiología de Canales Iónicos, Pontificia Universidad Javeriana, Bogotá, Colombia
- *Correspondence: Sara V. Ochoa, ; Yolima P. Torres,
| | - Zulma Casas
- Departamento de Nutrición y Bioquímica, Pontificia Universidad Javeriana, Bogotá, Colombia
| | - Sonia L. Albarracín
- Departamento de Nutrición y Bioquímica, Pontificia Universidad Javeriana, Bogotá, Colombia
| | - Jhon Jairo Sutachan
- Departamento de Nutrición y Bioquímica, Pontificia Universidad Javeriana, Bogotá, Colombia
| | - Yolima P. Torres
- Departamento de Nutrición y Bioquímica, Pontificia Universidad Javeriana, Bogotá, Colombia
- *Correspondence: Sara V. Ochoa, ; Yolima P. Torres,
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15
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Zhang Z, Kang L, Yan X, Leng Z, Fang K, Chen T, Xu M. Global Trends and Hotspots of Transient Receptor Potential Melastatin 8 Research from 2002 to 2021: A Bibliometric Analysis. J Pain Res 2022; 15:3881-3892. [DOI: 10.2147/jpr.s393582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Accepted: 12/06/2022] [Indexed: 12/14/2022] Open
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16
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Plaza‐Cayón A, González‐Muñiz R, Martín‐Martínez M. Mutations of TRPM8 channels: Unraveling the molecular basis of activation by cold and ligands. Med Res Rev 2022; 42:2168-2203. [PMID: 35976012 PMCID: PMC9805079 DOI: 10.1002/med.21920] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 07/21/2022] [Accepted: 07/28/2022] [Indexed: 01/09/2023]
Abstract
The cation nonselective channel TRPM8 is activated by multiple stimuli, including moderate cold and various chemical compounds (i.e., menthol and icilin [Fig. 1], among others). While research continues growing on the understanding of the physiological involvement of TRPM8 channels and their role in various pathological states, the information available on its activation mechanisms has also increased, supported by mutagenesis and structural studies. This review compiles known information on specific mutations of channel residues and their consequences on channel viability and function. Besides, the comparison of sequence of animals living in different environments, together with chimera and mutagenesis studies are helping to unravel the mechanism of adaptation to different temperatures. The results of mutagenesis studies, grouped by different channel regions, are compared with the current knowledge of TRPM8 structures obtained by cryo-electron microscopy. Trying to make this review self-explicative and highly informative, important residues for TRPM8 function are summarized in a figure, and mutants, deletions and chimeras are compiled in a table, including also the observed effects by different methods of activation and the corresponding references. The information provided by this review may also help in the design of new ligands for TRPM8, an interesting biological target for therapeutic intervention.
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17
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Yin Y, Zhang F, Feng S, Butay KJ, Borgnia MJ, Im W, Lee SY. Activation mechanism of the mouse cold-sensing TRPM8 channel by cooling agonist and PIP 2. Science 2022; 378:eadd1268. [PMID: 36227998 PMCID: PMC9795508 DOI: 10.1126/science.add1268] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The transient receptor potential melastatin 8 (TRPM8) channel is the primary molecular transducer responsible for the cool sensation elicited by menthol and cold in mammals. TRPM8 activation is controlled by cooling compounds together with the membrane lipid phosphatidylinositol 4,5-bisphosphate (PIP2). Our knowledge of cold sensation and the therapeutic potential of TRPM8 for neuroinflammatory diseases and pain will be enhanced by understanding the structural basis of cooling agonist- and PIP2-dependent TRPM8 activation. We present cryo-electron microscopy structures of mouse TRPM8 in closed, intermediate, and open states along the ligand- and PIP2-dependent gating pathway. Our results uncover two discrete agonist sites, state-dependent rearrangements in the gate positions, and a disordered-to-ordered transition of the gate-forming S6-elucidating the molecular basis of chemically induced cool sensation in mammals.
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Affiliation(s)
- Ying Yin
- Department of Biochemistry, Duke University School of Medicine, Durham, NC, 27710, USA
| | - Feng Zhang
- Department of Biochemistry, Duke University School of Medicine, Durham, NC, 27710, USA
| | - Shasha Feng
- Departments of Biological Sciences, Chemistry, and Bioengineering, Lehigh University, Bethlehem, PA, 18015, USA
| | - Kevin John Butay
- Genome Integrity and Structural Biology Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, NC 27709, USA
| | - Mario J. Borgnia
- Department of Biochemistry, Duke University School of Medicine, Durham, NC, 27710, USA.,Genome Integrity and Structural Biology Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, NC 27709, USA
| | - Wonpil Im
- Departments of Biological Sciences, Chemistry, and Bioengineering, Lehigh University, Bethlehem, PA, 18015, USA
| | - Seok-Yong Lee
- Department of Biochemistry, Duke University School of Medicine, Durham, NC, 27710, USA.,Correspondence to: S.-Y. Lee, , telephone: 919-684-1005
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18
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Chen X, Xu L, Zhang H, Wen H, Yang F. Differential Activation of TRPM8 by the Stereoisomers of Menthol. Front Pharmacol 2022; 13:898670. [PMID: 35800442 PMCID: PMC9253294 DOI: 10.3389/fphar.2022.898670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Accepted: 05/09/2022] [Indexed: 11/29/2022] Open
Abstract
The stereoisomers of menthol elicit cooling sensation to various levels. Though the high-resolution three-dimensional structures of the menthol receptor, the transient receptor potential melastatin 8 (TRPM8) ion channels, have been revolved in different states, the menthol-bound state structure is not determined and how the stereoisomers of menthol interact with TRPM8 remains largely elusive. Taking advantage of the identical atom composition but distinct spatial orientation of chemical groups in menthol stereoisomers, we performed thermodynamic mutant cycle analysis (TMCA) with patch-clamp recordings to probe the interaction between these ligands and TRPM8. By comparing (−)-menthol with (+)-neoisomenthol or (+)-neomenthol, we observed that the isopropyl or hydroxyl group in menthol interacts with the S4 or S3 helix in TRPM8, respectively. These interactions were also corroborated in our molecular docking of the stereoisomers, though the predicted structural details in the interactions of these ligands with TRPM8 residues are different. Therefore, we suggest similar molecular mechanisms of TRPM8 activation by the stereoisomers of menthol, while the binding configuration of an individual stereoisomer is varied.
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Affiliation(s)
- Xiaoying Chen
- Department of Biophysics, Kidney Disease Center of the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Lizhen Xu
- Department of Biophysics, Kidney Disease Center of the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Heng Zhang
- Department of Biophysics, Kidney Disease Center of the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Han Wen
- DP Technology, Beijing, China
| | - Fan Yang
- Department of Biophysics, Kidney Disease Center of the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Alibaba-Zhejiang University Joint Research Center of Future Digital Healthcare, Hangzhou, China
- *Correspondence: Fan Yang,
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19
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Cabezas-Bratesco D, Mcgee FA, Colenso CK, Zavala K, Granata D, Carnevale V, Opazo JC, Brauchi SE. Sequence and structural conservation reveal fingerprint residues in TRP channels. eLife 2022; 11:73645. [PMID: 35686986 PMCID: PMC9242649 DOI: 10.7554/elife.73645] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Accepted: 05/19/2022] [Indexed: 11/13/2022] Open
Abstract
Transient receptor potential (TRP) proteins are a large family of cation-selective channels, surpassed in variety only by voltage-gated potassium channels. Detailed molecular mechanisms governing how membrane voltage, ligand binding, or temperature can induce conformational changes promoting the open state in TRP channels are still a matter of debate. Aiming to unveil distinctive structural features common to the transmembrane domains within the TRP family, we performed phylogenetic reconstruction, sequence statistics, and structural analysis over a large set of TRP channel genes. Here, we report an exceptionally conserved set of residues. This fingerprint is composed of twelve residues localized at equivalent three-dimensional positions in TRP channels from the different subtypes. Moreover, these amino acids are arranged in three groups, connected by a set of aromatics located at the core of the transmembrane structure. We hypothesize that differences in the connectivity between these different groups of residues harbor the apparent differences in coupling strategies used by TRP subgroups.
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Affiliation(s)
| | - Francisco A Mcgee
- Department of Biology, Temple University, Philadelphia, United States
| | - Charlotte K Colenso
- School of Cellular and Molecular Medicine, University of Bristol, Bristol, United Kingdom
| | - Kattina Zavala
- Instituto de Ciencias Ambientales y Evolutivas, Universidad Austral de Chile, Valdivia, Chile
| | - Daniele Granata
- Department of Biology, Temple University, Philadelphia, United States
| | | | - Juan C Opazo
- Instituto de Ciencias Ambientales y Evolutivas, Universidad Austral de Chile, Valdivia, Chile
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20
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Al-Harrasi A, Behl T, Upadhyay T, Chigurupati S, Bhatt S, Sehgal A, Bhatia S, Singh S, Sharma N, Vijayabalan S, Palanimuthu VR, Das S, Kaur R, Aleya L, Bungau S. Targeting natural products against SARS-CoV-2. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:42404-42432. [PMID: 35362883 PMCID: PMC8972763 DOI: 10.1007/s11356-022-19770-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Accepted: 03/13/2022] [Indexed: 06/01/2023]
Abstract
The human coronavirus disease (COVID-19) pandemic is caused by a novel coronavirus; the Severe Acute Respiratory Syndrome Coronavirus (SARS-CoV-2). Natural products, secondary metabolites show positive leads with antiviral and immunotherapy treatments using genomic studies in silico docking. In addition, it includes the action of a mechanism targeting the SARS-CoV-2. In this literature, we aimed to evaluate the antiviral movement of the NT-VRL-1 unique terpene definition to Human coronavirus (HCoV-229E). The effects of 19 hydrolysable tannins on the SARS-CoV-2 were therefore theoretically reviewed and analyzed utilising the molecular operating surroundings for their C-Like protease 3CLpro catalytic dyad residues Angiotensin converting enzyme-2 (MOE 09). Pedunculagin, tercatan, and castalin were detected as interacting strongly with SARS-receptor Cov-2's binding site and catalytic dyad (Cys145 and His41). SARS-CoV-2 methods of subunit S1 (ACE2) inhibit the interaction of the receiver with the s-protein once a drug molecule is coupled to the s-protein and prevent it from infecting the target cells in alkaloids. Our review strongly demonstrates the evidence that natural compounds and their derivatives can be used against the human coronavirus and serves as an area of research for future perspective.
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Affiliation(s)
- Ahmed Al-Harrasi
- Natural & Medical Sciences Research Center, University of Nizwa, Birkat Al Mawz, Oman
| | - Tapan Behl
- Chitkara College of Pharmacy, Chitkara University, Punjab, India.
| | - Tanuj Upadhyay
- Amity Institute of Pharmacy, Amity University, Gwalior, Madhya Pradesh, India
| | - Sridevi Chigurupati
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, Qassim University, Buraidah, Kingdom of Saudi Arabia
| | - Shvetank Bhatt
- Amity Institute of Pharmacy, Amity University, Gwalior, Madhya Pradesh, India
| | - Aayush Sehgal
- Chitkara College of Pharmacy, Chitkara University, Punjab, India
| | - Saurabh Bhatia
- Natural & Medical Sciences Research Center, University of Nizwa, Birkat Al Mawz, Oman
- School of Health Science, University of Petroleum and Energy Studies, Dehradun, Uttarakhand, India
| | - Sukhbir Singh
- Chitkara College of Pharmacy, Chitkara University, Punjab, India
| | - Neelam Sharma
- Chitkara College of Pharmacy, Chitkara University, Punjab, India
| | - Shantini Vijayabalan
- Faculty of Health and Medical Sciences, School of Pharmacy, Taylor's University, Subang Jaya, Kuala Lumpur, Malaysia
| | - Vasanth Raj Palanimuthu
- Department of Pharmaceutical Biotechnology, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Ooty, Nilgiris, Tamilnadu, India
| | - Suprava Das
- Department of Pharmacology, Faculty of Medicine, AIMST University, Semeling, Bedong, Kedah, Malaysia
| | - Rajwinder Kaur
- Chitkara College of Pharmacy, Chitkara University, Punjab, India
| | - Lotfi Aleya
- Chrono-Environment Laboratory, UMR CNRS 6249, Bourgogne Franche-Comté University, Besançon, France
| | - Simona Bungau
- Department of Pharmacy, Faculty of Medicine and Pharmacy, University of Oradea, Oradea, Romania
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21
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Fallah HP, Ahuja E, Lin H, Qi J, He Q, Gao S, An H, Zhang J, Xie Y, Liang D. A Review on the Role of TRP Channels and Their Potential as Drug Targets_An Insight Into the TRP Channel Drug Discovery Methodologies. Front Pharmacol 2022; 13:914499. [PMID: 35685622 PMCID: PMC9170958 DOI: 10.3389/fphar.2022.914499] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Accepted: 04/27/2022] [Indexed: 01/13/2023] Open
Abstract
Transient receptor potential (TRP) proteins are a large group of ion channels that control many physiological functions in our body. These channels are considered potential therapeutic drug targets for various diseases such as neurological disorders, cancers, cardiovascular disease, and many more. The Nobel Prize in Physiology/Medicine in the year 2021 was awarded to two scientists for the discovery of TRP and PIEZO ion channels. Improving our knowledge of technologies for their study is essential. In the present study, we reviewed the role of TRP channel types in the control of normal physiological functions as well as disease conditions. Also, we discussed the current and novel technologies that can be used to study these channels successfully. As such, Flux assays for detecting ionic flux through ion channels are among the core and widely used tools for screening drug compounds. Technologies based on these assays are available in fully automated high throughput set-ups and help detect changes in radiolabeled or non-radiolabeled ionic flux. Aurora's Ion Channel Reader (ICR), which works based on label-free technology of flux assay, offers sensitive, accurate, and reproducible measurements to perform drug ranking matching with patch-clamp (gold standard) data. The non-radiolabeled trace-based flux assay coupled with the ICR detects changes in various ion types, including potassium, calcium, sodium, and chloride channels, by using appropriate tracer ions. This technology is now considered one of the very successful approaches for analyzing ion channel activity in modern drug discovery. It could be a successful approach for studying various ion channels and transporters, including the different members of the TRP family of ion channels.
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Affiliation(s)
| | - Ekta Ahuja
- Aurora Biomed Inc., Vancouver, BC, Canada
| | | | - Jinlong Qi
- Department of Pharmacology, Hebei Medical University, Shijiazhuang, China
| | - Qian He
- Aurora Discovery Inc., Foshan, China
| | - Shan Gao
- Aurora Discovery Inc., Foshan, China
| | | | | | | | - Dong Liang
- Aurora Biomed Inc., Vancouver, BC, Canada
- Aurora Discovery Inc., Foshan, China
- Guangzhou Institute of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China
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22
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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: 6] [Impact Index Per Article: 3.0] [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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23
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Mao LP, Jiao Y, Xiang JH, Luo XW, He Q, Ran DH, Xu Q, Lang CH, Chen LX. Cold-inducible RNA-binding protein migrates from the nucleus to the cytoplasm under cold stress in normal human bronchial epithelial cells via TRPM8-mediated mechanism. ANNALS OF TRANSLATIONAL MEDICINE 2021; 9:1470. [PMID: 34734022 PMCID: PMC8506723 DOI: 10.21037/atm-21-4447] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Accepted: 09/16/2021] [Indexed: 11/11/2022]
Abstract
Background Cold-inducible RNA-binding protein (CIRP or hnRNP A18) is a multifunctional stress-responsive protein. Our previous study demonstrated that cold stress increased CIRP expression and migrated from the nucleus to the cytoplasm in airway epithelial cells. However, the mechanism through which CIRP migrates from the nucleus to the cytoplasm upon cold stress remains unknown. Methods The expression of CIRP in the bronchial epithelium was examined using immunofluorescence, real-time polymerase chain reaction (RT-PCR), and Western blotting. The expression of inflammatory factors interleukin-1β (IL-1β), interleukin-6 (IL-6), interleukin-8 (IL-8), and tumor necrosis factor-α (TNF-α) were detected by ELISA and RT-PCR. Transient receptor potential melastatin 8 (TRPM8) receptor function was characterized by Ca2+ imaging. Results Cold stress upregulated the expression of CIRP, inflammatory factors and promoted the translocation of CIRP from the nucleus to the cytoplasm in normal human bronchial epithelial (NHBE) cells. Cold stress activated the TRPM8/(Ca2+)/PKCα/glycogen synthase kinase 3β (GSK3β) signaling cascade, and that inhibition of this signaling pathway attenuated the migration of CIRP from the nucleus to cytoplasm but did not decrease its overexpression induced by cold stress. Knocked down CIRP expression or blocked CIRP migration between the nucleus and cytoplasm significantly decreased inflammatory factor expression. Conclusions These results indicate that cold stress leads to the migration of CIRP from the nucleus to the cytoplasm with alteration of expression, which are involved in the expression of inflammatory factors (IL-1β, IL-6, IL-8 and TNF-α) induced by cold air, through TRPM8/Ca2+/PKCα/GSK3β signaling cascade.
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Affiliation(s)
- Liang-Ping Mao
- Department of Respiratory and Critical Care Medicine, Chongqing University Three Gorges Hospital, Chongqing, China
| | - Yan Jiao
- Department of Respiratory and Critical Care Medicine, Chongqing University Three Gorges Hospital, Chongqing, China
| | - Jian-Hua Xiang
- Department of Respiratory and Critical Care Medicine, Chongqing University Three Gorges Hospital, Chongqing, China
| | - Xin-Wei Luo
- Department of Respiratory and Critical Care Medicine, Chongqing University Three Gorges Hospital, Chongqing, China
| | - Qian He
- Department of Respiratory and Critical Care Medicine, Chongqing University Three Gorges Hospital, Chongqing, China
| | - Dan-Hua Ran
- Department of Respiratory and Geriatrics Medicine, Chongqing Public Health Medical Center, Chongqing, China
| | - Qing Xu
- Department of Respiratory and Critical Care Medicine, Eastern Hospital, Sichuan Provincial Medical Sciences Academy & Sichuan Provincial People's Hospital, Chengdu, China
| | - Chun-Hui Lang
- Department of Clinical Nutrition, Chongqing University Three Gorges Hospital, Chongqing, China
| | - Ling-Xiu Chen
- Department of Respiratory and Critical Care Medicine, Chongqing University Three Gorges Hospital, Chongqing, China
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24
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Wang G. Ligand-stereoselective allosteric activation of cold-sensing TRPM8 channels by an H-bonded homochiral menthol dimer with head-to-head or head-to-tail. Chirality 2021; 33:783-796. [PMID: 34596287 DOI: 10.1002/chir.23364] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 09/01/2021] [Accepted: 09/02/2021] [Indexed: 11/07/2022]
Abstract
Both menthol and its analog WS-12 share the same hydrophobic intra-subunit binding pocket between a voltage-sensor-like domain and a TRP domain in a cold-sensing TRPM8 channel. However, unlike WS-12, menthol upregulates TRPM8 with a low efficacy but a high coefficient of a dose response at membrane hyperpolarization and with ligand stereoselectivity at membrane depolarization. The underlying mechanisms are unknown. Here, this in silico research suggested that the ligand-stereoselective sequential cooperativity between two menthol molecules in the WS-12 pocket is required for allosteric activation of TRPM8. Furthermore, two H-bonded homochiral menthol dimers with both head-to-head and head-to-tail can compete for the WS-12 site via non-covalent interactions. Although both dimers can form an H-bonding network with a voltage sensor S4 to disrupt a S3-S4 salt bridge in the voltage-sensor-like domain to release a "parking brake," only one dimer may drive channel opening by pushing a "gas pedal" in the TRP domain away from the S6 gate against S4. In this way, the efficacy is decreased, but the cooperativity is increased for the menthol effect at membrane hyperpolarization. Therefore, this review may extend a new pathway for ligand-stereoselective allosteric regulation of other voltage- and ligand-gated ion channels by menthol.
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Affiliation(s)
- Guangyu Wang
- Department of Drug Research and Development, Institute of Biophysical Medico-chemistry, Reno, NV, USA
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25
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Izquierdo C, Martín-Martínez M, Gómez-Monterrey I, González-Muñiz R. TRPM8 Channels: Advances in Structural Studies and Pharmacological Modulation. Int J Mol Sci 2021; 22:ijms22168502. [PMID: 34445208 PMCID: PMC8395166 DOI: 10.3390/ijms22168502] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 07/23/2021] [Accepted: 07/27/2021] [Indexed: 12/13/2022] Open
Abstract
The transient receptor potential melastatin subtype 8 (TRPM8) is a cold sensor in humans, activated by low temperatures (>10, <28 °C), but also a polymodal ion channel, stimulated by voltage, pressure, cooling compounds (menthol, icilin), and hyperosmolarity. An increased number of experimental results indicate the implication of TRPM8 channels in cold thermal transduction and pain detection, transmission, and maintenance in different tissues and organs. These channels also have a repercussion on different kinds of life-threatening tumors and other pathologies, which include urinary and respiratory tract dysfunctions, dry eye disease, and obesity. This compendium firstly covers newly described papers on the expression of TRPM8 channels and their correlation with pathological states. An overview on the structural knowledge, after cryo-electron microscopy success in solving different TRPM8 structures, as well as some insights obtained from mutagenesis studies, will follow. Most recently described families of TRPM8 modulators are also covered, along with a section of molecules that have reached clinical trials. To finalize, authors provide an outline of the potential prospects in the TRPM8 field.
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Affiliation(s)
- Carolina Izquierdo
- Departamento de Biomiméticos, Instituto de Química Médica, Juan de la Cierva 3, 28006 Madrid, Spain; (C.I.); (M.M.-M.)
- Programa de Doctorado en Química Orgánica, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Mercedes Martín-Martínez
- Departamento de Biomiméticos, Instituto de Química Médica, Juan de la Cierva 3, 28006 Madrid, Spain; (C.I.); (M.M.-M.)
| | - Isabel Gómez-Monterrey
- Dipartimento di Farmacia, Università degli Studi di Napoli “Federico II”, Via D. Montesano 49, 80131 Naples, Italy
- Correspondence: (I.G.-M.); (R.G.-M.)
| | - Rosario González-Muñiz
- Departamento de Biomiméticos, Instituto de Química Médica, Juan de la Cierva 3, 28006 Madrid, Spain; (C.I.); (M.M.-M.)
- Correspondence: (I.G.-M.); (R.G.-M.)
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26
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Sanechika S, Shimobori C, Ohbuchi K. Identification of herbal components as TRPA1 agonists and TRPM8 antagonists. J Nat Med 2021; 75:717-725. [PMID: 33877504 DOI: 10.1007/s11418-021-01515-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Accepted: 04/08/2021] [Indexed: 12/19/2022]
Abstract
Transient receptor potential (TRP) channels are non-selective cation channels that are implicated in analgesia, bowel motility, wound healing, thermoregulation, vasodilation and voiding dysfunction. Many natural products have been reported to affect the activity of TRP channels. We hypothesize that numerous traditional herbal medicines (THMs) might exert their pharmacological activity through modulating the activity of TRP channels. The present study aimed to evaluate the effects of flavonoid aglycones and their glycosides, which are the main components of many THMs, on the TRP channel subtypes. A Ca2+ influx assay was performed using recombinant human TRPA1, TRPV1, TRPV4 and TRPM8 cell lines. Our findings showed that flavonoid aglycones and glycycoumarin activated TRPA1. In particular, isoflavone and chalcone compounds displayed potent TRPA1 agonistic activity. Furthermore, flavone aglycones showed concomitant potent TRPM8 inhibiting activity. Indeed, flavone, isoflavone aglycones, non-prenylated chalcones and glycycoumarin were found to be TRPM8 inhibitors. Hence, flavonoid aglycones metabolized by lactase-phlorizin hydrolase and β-glucosidase in the small intestine or gut microbiota of the large intestine could generate TRPA1 agonists and TRPM8 antagonists.
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Affiliation(s)
- Sho Sanechika
- Tsumura Kampo Research Laboratories, Kampo Research and Development Division, Tsumura & Co, 3586 Yoshiwara, Ami-machi, Inashiki-gun, Ibaraki, 300-1192, Japan.
| | - Chika Shimobori
- Tsumura Kampo Research Laboratories, Kampo Research and Development Division, Tsumura & Co, 3586 Yoshiwara, Ami-machi, Inashiki-gun, Ibaraki, 300-1192, Japan
| | - Katsuya Ohbuchi
- Tsumura Kampo Research Laboratories, Kampo Research and Development Division, Tsumura & Co, 3586 Yoshiwara, Ami-machi, Inashiki-gun, Ibaraki, 300-1192, Japan
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27
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Structural basis for promiscuous action of monoterpenes on TRP channels. Commun Biol 2021; 4:293. [PMID: 33674682 PMCID: PMC7935860 DOI: 10.1038/s42003-021-01776-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Accepted: 01/22/2021] [Indexed: 01/31/2023] Open
Abstract
Monoterpenes are major constituents of plant-derived essential oils and have long been widely used for therapeutic and cosmetic applications. The monoterpenes menthol and camphor are agonists or antagonists for several TRP channels such as TRPM8, TRPV1, TRPV3 and TRPA1. However, which regions within TRPV1 and TRPV3 confer sensitivity to monoterpenes or other synthesized chemicals such as 2-APB are unclear. In this study we identified conserved arginine and glycine residues in the linker between S4 and S5 that are related to the action of these chemicals and validated these findings in molecular dynamics simulations. The involvement of these amino acids differed between TRPV3 and TRPV1 for chemical-induced and heat-evoked activation. These findings provide the basis for characterization of physiological function and biophysical properties of ion channels.
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28
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Muller C, Reggio PH. An Analysis of the Putative CBD Binding Site in the Ionotropic Cannabinoid Receptors. Front Cell Neurosci 2020; 14:615811. [PMID: 33362478 PMCID: PMC7755602 DOI: 10.3389/fncel.2020.615811] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2020] [Accepted: 11/18/2020] [Indexed: 12/22/2022] Open
Abstract
Cannabinoids have been long studied for their therapeutic properties, particularly for their use in the treatment of pain. As new therapies are sought after to treat conditions of chronic pain, so is a better understanding of the ligands and their target receptors or channels. A recently published cryo-EM structure showed the putative binding location of a well-known cannabinoid ligand, cannabidiol (CBD), in TRPV2, a channel that has been implicated in inflammation and chronic pain. TRPV2, along with TRPV1, TRPV3, TRPV4, TRPA1, and TRPM8 all have the capability to be modulated by cannabinoid ligands and are located in the peripheral nervous system. Here, we analyze the putative CBD binding site in each of these channels and compare structural and sequential information with experimental data.
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Affiliation(s)
| | - Patricia H. Reggio
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, NC, United States
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29
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Bertamino A, Ostacolo C, Medina A, Di Sarno V, Lauro G, Ciaglia T, Vestuto V, Pepe G, Basilicata MG, Musella S, Smaldone G, Cristiano C, Gonzalez-Rodriguez S, Fernandez-Carvajal A, Bifulco G, Campiglia P, Gomez-Monterrey I, Russo R. Exploration of TRPM8 Binding Sites by β-Carboline-Based Antagonists and Their In Vitro Characterization and In Vivo Analgesic Activities. J Med Chem 2020; 63:9672-9694. [PMID: 32787109 PMCID: PMC8009520 DOI: 10.1021/acs.jmedchem.0c00816] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
![]()
Transient
receptor potential melastatin 8 (TRPM8) ion channel represents
a valuable pharmacological option for several therapeutic areas. Here,
a series of conformationally restricted derivatives of the previously
described TRPM8 antagonist N,N′-dibenzyl
tryptophan 4 were prepared and characterized in vitro
by Ca2+-imaging and patch-clamp electrophysiology assays.
Molecular modeling studies led to identification of a broad and well-defined
interaction network of these derivatives inside the TRPM8 binding
site, underlying their antagonist activity. The (5R,11aS)-5-(4-chlorophenyl)-2-(4-fluorobenzyl)-5,6,11,11a-tetrahydro-1H-imidazo[1′,5′:1,6]pyrido[3,4-b]indole-1,3(2H)-dione (31a) emerged as a potent (IC50 = 4.10 ± 1.2 nM), selective,
and metabolically stable TRPM8 antagonist. In vivo, 31a showed significant target coverage in an icilin-induced WDS (at
11.5 mg/kg ip), an oxaliplatin-induced cold allodynia (at 10–30
μg sc), and CCI-induced thermal hyperalgesia (at 11.5 mg/kg
ip) mice models. These results confirm the tryptophan moiety as a
solid pharmacophore template for the design of highly potent modulators
of TRPM8-mediated activities.
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Affiliation(s)
- Alessia Bertamino
- Department of Pharmacy, University of Salerno, Via G. Paolo II 132, 84084 Fisciano, Salerno, Italy
| | - Carmine Ostacolo
- Department of Pharmacy, University Federico II of Naples, Via D. Montesano 49, 80131 Naples, Italy
| | - Alicia Medina
- IDiBE, Universitas Miguel Herna'ndez, Avda de la Universidad, 032020 Elche, Spain
| | - Veronica Di Sarno
- Department of Pharmacy, University of Salerno, Via G. Paolo II 132, 84084 Fisciano, Salerno, Italy
| | - Gianluigi Lauro
- Department of Pharmacy, University of Salerno, Via G. Paolo II 132, 84084 Fisciano, Salerno, Italy
| | - Tania Ciaglia
- Department of Pharmacy, University of Salerno, Via G. Paolo II 132, 84084 Fisciano, Salerno, Italy
| | - Vincenzo Vestuto
- Department of Pharmacy, University of Salerno, Via G. Paolo II 132, 84084 Fisciano, Salerno, Italy
| | - Giacomo Pepe
- Department of Pharmacy, University of Salerno, Via G. Paolo II 132, 84084 Fisciano, Salerno, Italy
| | | | - Simona Musella
- European Biomedical Research Institute (EBRIS), Via S. De Renzi 50, 84125 Salerno, Italy
| | - Gerardina Smaldone
- Department of Pharmacy, University of Salerno, Via G. Paolo II 132, 84084 Fisciano, Salerno, Italy
| | - Claudia Cristiano
- Department of Pharmacy, University Federico II of Naples, Via D. Montesano 49, 80131 Naples, Italy
| | | | | | - Giuseppe Bifulco
- Department of Pharmacy, University of Salerno, Via G. Paolo II 132, 84084 Fisciano, Salerno, Italy
| | - Pietro Campiglia
- Department of Pharmacy, University of Salerno, Via G. Paolo II 132, 84084 Fisciano, Salerno, Italy.,European Biomedical Research Institute (EBRIS), Via S. De Renzi 50, 84125 Salerno, Italy
| | - Isabel Gomez-Monterrey
- Department of Pharmacy, University Federico II of Naples, Via D. Montesano 49, 80131 Naples, Italy
| | - Roberto Russo
- Department of Pharmacy, University Federico II of Naples, Via D. Montesano 49, 80131 Naples, Italy
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30
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Lai H, Liu C, Hou L, Lin W, Chen T, Hong A. TRPM8-regulated calcium mobilization plays a critical role in synergistic chemosensitization of Borneol on Doxorubicin. Theranostics 2020; 10:10154-10170. [PMID: 32929340 PMCID: PMC7481425 DOI: 10.7150/thno.45861] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Accepted: 07/31/2020] [Indexed: 02/06/2023] Open
Abstract
Background: Lung cancer has a high mortality rate and is resistant to multiple chemotherapeutics. Natural Borneol (NB) is a monoterpenoid compound that facilitates the bioavailability of drugs. In this study, we investigated the effects of NB on chemosensitivity in the A549 human lung adenocarcinoma cell line and to elucidate therapeutic molecular target of NB. Methods: The chemosensitivity effects of NB in A549 cells were examined by MTT assay. The mechanism of NB action was evaluated using flow cytometry and Western blotting assays. Surface plasmon resonance (SPR) and LC-MS combined analysis (MS-SPRi) was performed to elucidate the candidate molecular target of NB. The chemosensitizing capacity of NB in vivo was assessed in nude mice bearing A549 tumors. Results: NB pretreatment sensitized A549 cells to low doxorubicin (DOX) dosage, leading to a 15.7% to 41.5% increase in apoptosis. This increase was correlated with ERK and AKT inactivation and activation of phospho-p38 MAPK, phospho-JNK, and phosphor-p53. Furthermore, this synergism depends on reactive oxygen species (ROS) generation. MS-SPRi analysis revealed that transient receptor potential melastatin-8 (TRPM8) is the candidate target of NB in potentiating DOX killing potency. Genetically, TRPM8 knock-down significantly suppresses the chemosensitizing effects of NB and inhibits ROS generation through restraining calcium mobilization. Moreover, pretreatment with NB synergistically enhances the anticancer effects of DOX to delay tumor progression in vivo. Conclusions: These results suggest that TRPM8 may be a valid therapeutic target in the potential application of NB, and show that NB is a chemosensitizer for lung cancer treatment.
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Affiliation(s)
- Haoqiang Lai
- Department of Cell Biology & Institute of Biomedicine, National Engineering Research Center of Genetic Medicine, Guangdong Provincial Key Laboratory of Bioengineering Medicine, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
- Department of Chemistry, Jinan University, Guangzhou, 510632, China
| | - Chang Liu
- Department of Chemistry, Jinan University, Guangzhou, 510632, China
| | - Liyuan Hou
- Department of Chemistry, Jinan University, Guangzhou, 510632, China
| | - Wenwei Lin
- Department of Chemistry, Jinan University, Guangzhou, 510632, China
| | - Tianfeng Chen
- Department of Chemistry, Jinan University, Guangzhou, 510632, China
| | - An Hong
- Department of Cell Biology & Institute of Biomedicine, National Engineering Research Center of Genetic Medicine, Guangdong Provincial Key Laboratory of Bioengineering Medicine, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
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31
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Xu L, Han Y, Chen X, Aierken A, Wen H, Zheng W, Wang H, Lu X, Zhao Z, Ma C, Liang P, Yang W, Yang S, Yang F. Molecular mechanisms underlying menthol binding and activation of TRPM8 ion channel. Nat Commun 2020; 11:3790. [PMID: 32728032 PMCID: PMC7391767 DOI: 10.1038/s41467-020-17582-x] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Accepted: 07/06/2020] [Indexed: 02/07/2023] Open
Abstract
Menthol in mints elicits coolness sensation by selectively activating TRPM8 channel. Although structures of TRPM8 were determined in the apo and liganded states, the menthol-bounded state is unresolved. To understand how menthol activates the channel, we docked menthol to the channel and systematically validated our menthol binding models with thermodynamic mutant cycle analysis. We observed that menthol uses its hydroxyl group as a hand to specifically grab with R842, and its isopropyl group as legs to stand on I846 and L843. By imaging with fluorescent unnatural amino acid, we found that menthol binding induces wide-spread conformational rearrangements within the transmembrane domains. By Φ analysis based on single-channel recordings, we observed a temporal sequence of conformational changes in the S6 bundle crossing and the selectivity filter leading to channel activation. Therefore, our study suggested a 'grab and stand' mechanism of menthol binding and how menthol activates TRPM8 at the atomic level.
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Affiliation(s)
- Lizhen Xu
- Department of Biophysics, and Kidney Disease Center of the First Affiliated Hospital, Zhejiang University School of Medicine, 310058, Hangzhou, Zhejiang Province, China
| | - Yalan Han
- Key Laboratory of Animal Models and Human Disease Mechanisms of Chinese Academy of Sciences/Key Laboratory of Bioactive Peptides of Yunnan Province, Kunming Institute of Zoology, 650223, Kunming, Yunnan, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Xiaoying Chen
- Department of Biophysics, and Kidney Disease Center of the First Affiliated Hospital, Zhejiang University School of Medicine, 310058, Hangzhou, Zhejiang Province, China
| | - Aerziguli Aierken
- Department of Biophysics, and Kidney Disease Center of the First Affiliated Hospital, Zhejiang University School of Medicine, 310058, Hangzhou, Zhejiang Province, China
| | - Han Wen
- Department of Physics, State University of New York at Buffalo, Buffalo, NY, USA
| | - Wenjun Zheng
- Department of Physics, State University of New York at Buffalo, Buffalo, NY, USA
| | - Hongkun Wang
- Key Laboratory of Combined Multi-organ Transplantation, Ministry of Public Health, The First Affiliated Hospital, Zhejiang University School of Medicine, Zhejiang, China
- Institute of Translational Medicine, Zhejiang University, Zhejiang, China
| | - Xiancui Lu
- Key Laboratory of Animal Models and Human Disease Mechanisms of Chinese Academy of Sciences/Key Laboratory of Bioactive Peptides of Yunnan Province, Kunming Institute of Zoology, 650223, Kunming, Yunnan, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Zhenye Zhao
- Department of Biophysics, and Kidney Disease Center of the First Affiliated Hospital, Zhejiang University School of Medicine, 310058, Hangzhou, Zhejiang Province, China
| | - Cheng Ma
- Protein facility, School of Medicine, Zhejiang University, Zhejiang, China
| | - Ping Liang
- Key Laboratory of Combined Multi-organ Transplantation, Ministry of Public Health, The First Affiliated Hospital, Zhejiang University School of Medicine, Zhejiang, China
- Institute of Translational Medicine, Zhejiang University, Zhejiang, China
| | - Wei Yang
- Department of Biophysics, and Department of Neurosurgery of the First Affiliated Hospital, Zhejiang University School of Medicine, 310058, Hangzhou, Zhejiang Province, China.
| | - Shilong Yang
- College of Wildlife and Protected Area, Northeast Forestry University, 150040, Harbin, China.
| | - Fan Yang
- Department of Biophysics, and Kidney Disease Center of the First Affiliated Hospital, Zhejiang University School of Medicine, 310058, Hangzhou, Zhejiang Province, China.
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32
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Yin Y, Lee SY. Current View of Ligand and Lipid Recognition by the Menthol Receptor TRPM8. Trends Biochem Sci 2020; 45:806-819. [PMID: 32532587 DOI: 10.1016/j.tibs.2020.05.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 04/26/2020] [Accepted: 05/12/2020] [Indexed: 12/29/2022]
Abstract
Transient receptor potential (TRP) melastatin member 8 (TRPM8), which is a calcium-permeable ion channel, functions as the primary molecular sensor of cold and menthol in humans. Recent cryoelectron microscopy (cryo-EM) studies of TRPM8 have shown distinct structural features in its architecture and domain assembly compared with the capsaicin receptor TRP vanilloid member 1 (TRPV1). Moreover, ligand-bound TRPM8 structures have uncovered unforeseen binding sites for both cooling agonists and membrane lipid phosphatidylinositol 4,5-bisphosphate [PI(4,5)P2]. These complex structures unveil the molecular basis of cooling agonist sensing by TRPM8 and the allosteric role of PI(4,5)P2 in agonist binding for TRPM8 activation. Here, we review the recent advances in TRPM8 structural biology and investigate the molecular principles governing the distinguishing role of TRPM8 as the evolutionarily conserved menthol receptor.
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Affiliation(s)
- Ying Yin
- Department of Biochemistry, Duke University School of Medicine, Durham, NC 27710, USA
| | - Seok-Yong Lee
- Department of Biochemistry, Duke University School of Medicine, Durham, NC 27710, USA.
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Talarico C, Gervasoni S, Manelfi C, Pedretti A, Vistoli G, Beccari AR. Combining Molecular Dynamics and Docking Simulations to Develop Targeted Protocols for Performing Optimized Virtual Screening Campaigns on The hTRPM8 Channel. Int J Mol Sci 2020; 21:E2265. [PMID: 32218173 PMCID: PMC7177470 DOI: 10.3390/ijms21072265] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Revised: 02/19/2020] [Accepted: 03/20/2020] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND There is an increasing interest in TRPM8 ligands of medicinal interest, the rational design of which can be nowadays supported by structure-based in silico studies based on the recently resolved TRPM8 structures. Methods: The study involves the generation of a reliable hTRPM8 homology model, the reliability of which was assessed by a 1.0 μs MD simulation which was also used to generate multiple receptor conformations for the following structure-based virtual screening (VS) campaigns; docking simulations utilized different programs and involved all monomers of the selected frames; the so computed docking scores were combined by consensus approaches based on the EFO algorithm. Results: The obtained models revealed very satisfactory performances; LiGen™ provided the best results among the tested docking programs; the combination of docking results from the four monomers elicited a markedly beneficial effect on the computed consensus models. Conclusions: The generated hTRPM8 model appears to be amenable for successful structure-based VS studies; cross-talk modulating effects between interacting monomers on the binding sites can be accounted for by combining docking simulations as performed on all the monomers; this strategy can have general applicability for docking simulations involving quaternary protein structures with multiple identical binding pockets.
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Affiliation(s)
- Carmine Talarico
- Dompé Farmaceutici SpA, Via Campo di Pile, 67100 L’Aquila, Italy; (C.T.); (C.M.)
| | - Silvia Gervasoni
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, Via Mangiagalli, 25, I-20133 Milano, Italy; (S.G.); (A.P.); (G.V.)
| | - Candida Manelfi
- Dompé Farmaceutici SpA, Via Campo di Pile, 67100 L’Aquila, Italy; (C.T.); (C.M.)
| | - Alessandro Pedretti
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, Via Mangiagalli, 25, I-20133 Milano, Italy; (S.G.); (A.P.); (G.V.)
| | - Giulio Vistoli
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, Via Mangiagalli, 25, I-20133 Milano, Italy; (S.G.); (A.P.); (G.V.)
| | - Andrea R. Beccari
- Dompé Farmaceutici SpA, Via Campo di Pile, 67100 L’Aquila, Italy; (C.T.); (C.M.)
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Journigan VB, Feng Z, Rahman S, Wang Y, Amin ARMR, Heffner CE, Bachtel N, Wang S, Gonzalez-Rodriguez S, Fernández-Carvajal A, Fernández-Ballester G, Hilton JK, Van Horn WD, Ferrer-Montiel A, Xie XQ, Rahman T. Structure-Based Design of Novel Biphenyl Amide Antagonists of Human Transient Receptor Potential Cation Channel Subfamily M Member 8 Channels with Potential Implications in the Treatment of Sensory Neuropathies. ACS Chem Neurosci 2020; 11:268-290. [PMID: 31850745 DOI: 10.1021/acschemneuro.9b00404] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Structure-activity relationship studies of a reported menthol-based transient receptor potential cation channel subfamily M member 8 channel (TRPM8) antagonist, guided by computational simulations and structure-based design, uncovers a novel series of TRPM8 antagonists with >10-fold selectivity versus related TRP subtypes. Spiro[4.5]decan-8-yl analogue 14 inhibits icilin-evoked Ca2+ entry in HEK-293 cells stably expressing human TRPM8 (hTRPM8) with an IC50 of 2.4 ± 1.0 nM, while in whole-cell patch-clamp recordings this analogue inhibits menthol-evoked currents with a hTRPM8 IC50 of 64 ± 2 nM. Molecular dynamics (MD) simulations of compound 14 in our homology model of hTRPM8 suggest that this antagonist forms extensive hydrophobic contacts within the orthosteric site. In the wet dog shakes (WDS) assay, compound 14 dose-dependently blocks icilin-triggered shaking behaviors in mice. Upon local administration, compound 14 dose dependently inhibits cold allodynia evoked by the chemotherapy oxaliplatin in a murine model of peripheral neuropathy at microgram doses. Our findings suggest that 14 and other biphenyl amide analogues within our series can find utility as potent antagonist chemical probes derived from (-)-menthol as well as small molecule therapeutic scaffolds for chemotherapy-induced peripheral neuropathy (CIPN) and other sensory neuropathies.
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Affiliation(s)
- V. Blair Journigan
- Department of Pharmaceutical Sciences, School of Pharmacy, Marshall University, Huntington, West Virginia 25755, United States
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, West Virginia 25755, United States
| | - Zhiwei Feng
- Department of Pharmaceutical Sciences and Computational Chemical Genomics Screening Center, School of Pharmacy, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
- NIDA National Center of Excellence for Computational Drug Abuse Research, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
- Drug Discovery Institute, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
| | - Saifur Rahman
- Department of Pharmacology, University of Cambridge, Tennis Court Road, Cambridge CB2 1TN, United Kingdom
| | - Yuanqiang Wang
- Department of Pharmaceutical Sciences and Computational Chemical Genomics Screening Center, School of Pharmacy, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
- NIDA National Center of Excellence for Computational Drug Abuse Research, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
- Drug Discovery Institute, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
| | - A. R. M. Ruhul Amin
- Department of Pharmaceutical Sciences, School of Pharmacy, Marshall University, Huntington, West Virginia 25755, United States
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, West Virginia 25755, United States
| | - Colleen E. Heffner
- Department of Pharmaceutical Sciences, School of Pharmacy, Marshall University, Huntington, West Virginia 25755, United States
| | - Nicholas Bachtel
- Department of Pharmaceutical Sciences, School of Pharmacy, Marshall University, Huntington, West Virginia 25755, United States
| | - Siyi Wang
- Department of Pharmaceutical Sciences and Computational Chemical Genomics Screening Center, School of Pharmacy, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
- NIDA National Center of Excellence for Computational Drug Abuse Research, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
- Drug Discovery Institute, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
| | - Sara Gonzalez-Rodriguez
- IDiBE: Instituto de Investigación, Desarrollo e innovación en Biotecnología sanitaria de Elche, Universitas Miguel Hernández, 03202 Elche, Spain
| | - Asia Fernández-Carvajal
- IDiBE: Instituto de Investigación, Desarrollo e innovación en Biotecnología sanitaria de Elche, Universitas Miguel Hernández, 03202 Elche, Spain
| | - Gregorio Fernández-Ballester
- IDiBE: Instituto de Investigación, Desarrollo e innovación en Biotecnología sanitaria de Elche, Universitas Miguel Hernández, 03202 Elche, Spain
| | - Jacob K. Hilton
- The School of Molecular Sciences, Arizona State University, Tempe, Arizona 85287, United States
- the Virginia G. Piper Center for Personalized Diagnostics, Biodesign Institute, Arizona State University, Tempe, Arizona 85281, United States
- The Magnetic Resonance Research Center, Arizona State University, Tempe, Arizona 85287, United States
| | - Wade D. Van Horn
- The School of Molecular Sciences, Arizona State University, Tempe, Arizona 85287, United States
- the Virginia G. Piper Center for Personalized Diagnostics, Biodesign Institute, Arizona State University, Tempe, Arizona 85281, United States
- The Magnetic Resonance Research Center, Arizona State University, Tempe, Arizona 85287, United States
| | - Antonio Ferrer-Montiel
- IDiBE: Instituto de Investigación, Desarrollo e innovación en Biotecnología sanitaria de Elche, Universitas Miguel Hernández, 03202 Elche, Spain
| | - Xiang-Qun Xie
- Department of Pharmaceutical Sciences and Computational Chemical Genomics Screening Center, School of Pharmacy, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
- NIDA National Center of Excellence for Computational Drug Abuse Research, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
- Drug Discovery Institute, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
| | - Taufiq Rahman
- Department of Pharmacology, University of Cambridge, Tennis Court Road, Cambridge CB2 1TN, United Kingdom
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Post-Translational Modification and Natural Mutation of TRPC Channels. Cells 2020; 9:cells9010135. [PMID: 31936014 PMCID: PMC7016788 DOI: 10.3390/cells9010135] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2019] [Revised: 01/03/2020] [Accepted: 01/03/2020] [Indexed: 02/06/2023] Open
Abstract
Transient Receptor Potential Canonical (TRPC) channels are homologues of Drosophila TRP channel first cloned in mammalian cells. TRPC family consists of seven members which are nonselective cation channels with a high Ca2+ permeability and are activated by a wide spectrum of stimuli. These channels are ubiquitously expressed in different tissues and organs in mammals and exert a variety of physiological functions. Post-translational modifications (PTMs) including phosphorylation, N-glycosylation, disulfide bond formation, ubiquitination, S-nitrosylation, S-glutathionylation, and acetylation play important roles in the modulation of channel gating, subcellular trafficking, protein-protein interaction, recycling, and protein architecture. PTMs also contribute to the polymodal activation of TRPCs and their subtle regulation in diverse physiological contexts and in pathological situations. Owing to their roles in the motor coordination and regulation of kidney podocyte structure, mutations of TRPCs have been implicated in diseases like cerebellar ataxia (moonwalker mice) and focal and segmental glomerulosclerosis (FSGS). The aim of this review is to comprehensively integrate all reported PTMs of TRPCs, to discuss their physiological/pathophysiological roles if available, and to summarize diseases linked to the natural mutations of TRPCs.
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36
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MacDonald DI, Wood JN, Emery EC. Molecular mechanisms of cold pain. NEUROBIOLOGY OF PAIN (CAMBRIDGE, MASS.) 2020; 7:100044. [PMID: 32090187 PMCID: PMC7025288 DOI: 10.1016/j.ynpai.2020.100044] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Revised: 01/23/2020] [Accepted: 01/24/2020] [Indexed: 12/17/2022]
Abstract
The sensation of cooling is essential for survival. Extreme cold is a noxious stimulus that drives protective behaviour and that we thus perceive as pain. However, chronic pain patients suffering from cold allodynia paradoxically experience innocuous cooling as excruciating pain. Peripheral sensory neurons that detect decreasing temperature express numerous cold-sensitive and voltage-gated ion channels that govern their response to cooling in health and disease. In this review, we discuss how these ion channels control the sense of cooling and cold pain under physiological conditions, before focusing on the molecular mechanisms by which ion channels can trigger pathological cold pain. With the ever-rising number of patients burdened by chronic pain, we end by highlighting the pressing need to define the cells and molecules involved in cold allodynia and so identify new, rational drug targets for the analgesic treatment of cold pain.
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Gruss F. Hot new structures of the cold sensor, TRPM8, reveal insights into the fundamentals of cold perception and adaptation. Cell Calcium 2019; 85:102112. [PMID: 31765906 DOI: 10.1016/j.ceca.2019.102112] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Revised: 11/12/2019] [Accepted: 11/14/2019] [Indexed: 11/28/2022]
Abstract
The ion channel TRPM8 has been identified as the primary cold sensor in humans, but insights into how cold perception is established remained elusive. This has changed now with newly published structures of TRPM8 in different states during channel gating, which help us understand why we feel cold and adapt to it.
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Affiliation(s)
- Fabian Gruss
- Laboratory of Structural Neurobiology, Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium; Center for Structural Biology, VIB, Brussels, Belgium; Structural Biology Brussels, Department of Bioengineering Sciences, Vrije Universiteit Brussel, Brussels, Belgium.
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38
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Bergman ME, Davis B, Phillips MA. Medically Useful Plant Terpenoids: Biosynthesis, Occurrence, and Mechanism of Action. Molecules 2019; 24:E3961. [PMID: 31683764 PMCID: PMC6864776 DOI: 10.3390/molecules24213961] [Citation(s) in RCA: 146] [Impact Index Per Article: 29.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Revised: 10/25/2019] [Accepted: 10/30/2019] [Indexed: 12/23/2022] Open
Abstract
Specialized plant terpenoids have found fortuitous uses in medicine due to their evolutionary and biochemical selection for biological activity in animals. However, these highly functionalized natural products are produced through complex biosynthetic pathways for which we have a complete understanding in only a few cases. Here we review some of the most effective and promising plant terpenoids that are currently used in medicine and medical research and provide updates on their biosynthesis, natural occurrence, and mechanism of action in the body. This includes pharmacologically useful plastidic terpenoids such as p-menthane monoterpenoids, cannabinoids, paclitaxel (taxol®), and ingenol mebutate which are derived from the 2-C-methyl-d-erythritol-4-phosphate (MEP) pathway, as well as cytosolic terpenoids such as thapsigargin and artemisinin produced through the mevalonate (MVA) pathway. We further provide a review of the MEP and MVA precursor pathways which supply the carbon skeletons for the downstream transformations yielding these medically significant natural products.
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Affiliation(s)
- Matthew E Bergman
- Department of Cellular and Systems Biology, University of Toronto, Toronto, ON M5S 3G5, Canada.
| | - Benjamin Davis
- Department of Cellular and Systems Biology, University of Toronto, Toronto, ON M5S 3G5, Canada.
| | - Michael A Phillips
- Department of Cellular and Systems Biology, University of Toronto, Toronto, ON M5S 3G5, Canada.
- Department of Biology, University of Toronto-Mississauga, Mississauga, ON L5L 1C6, Canada.
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Sisco NJ, Helsell CVM, Van Horn WD. Competitive Interactions between PIRT, the Cold Sensing Ion Channel TRPM8, and PIP 2 Suggest a Mechanism for Regulation. Sci Rep 2019; 9:14128. [PMID: 31575973 PMCID: PMC6773951 DOI: 10.1038/s41598-019-49912-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Accepted: 09/02/2019] [Indexed: 01/18/2023] Open
Abstract
TRPM8 is a member of the transient receptor potential ion channel family where it functions as a cold and pain sensor in humans and other higher organisms. Previous studies show that TRPM8 requires the signaling phosphoinositide lipid PIP2 to function. TRPM8 function is further regulated by other diverse mechanisms, including the small modulatory membrane protein PIRT (phosphoinositide regulator of TRP). Like TRPM8, PIRT also binds PIP2 and behavioral studies have shown that PIRT is required for normal TRPM8-mediated cold-sensing. To better understand the molecular mechanism of PIRT regulation of TRPM8, solution nuclear magnetic resonance (NMR) spectroscopy was used to assign the backbone resonances of full-length human PIRT and investigate the direct binding of PIRT to PIP2 and the human TRPM8 S1-S4 transmembrane domain. Microscale thermophoresis (MST) binding studies validate the NMR results and identify a competitive PIRT interaction between PIP2 and the TRPM8 S1-S4 domain. Computational PIP2 docking to a human TRPM8 comparative model was performed to help localize where PIRT may bind TRPM8. Taken together, our data suggest a mechanism where TRPM8, PIRT, and PIP2 form a regulatory complex and PIRT modulation of TRPM8 arises, at least in part, by regulating local concentrations of PIP2 accessible to TRPM8.
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Affiliation(s)
- Nicholas J Sisco
- School of Molecular Sciences, Arizona State University, Tempe, AZ, 85287, USA
- The Biodesign Institute, Arizona State University, Tempe, AZ, 85281, USA
- The Virginia G. Piper Center for Personalized Diagnostics, Arizona State University, Tempe, AZ, 85281, USA
- The Magnetic Resonance Research Center, Arizona State University, Tempe, AZ, 85287, USA
| | - Cole V M Helsell
- School of Molecular Sciences, Arizona State University, Tempe, AZ, 85287, USA
- The Biodesign Institute, Arizona State University, Tempe, AZ, 85281, USA
- The Virginia G. Piper Center for Personalized Diagnostics, Arizona State University, Tempe, AZ, 85281, USA
- The Magnetic Resonance Research Center, Arizona State University, Tempe, AZ, 85287, USA
| | - Wade D Van Horn
- School of Molecular Sciences, Arizona State University, Tempe, AZ, 85287, USA.
- The Biodesign Institute, Arizona State University, Tempe, AZ, 85281, USA.
- The Virginia G. Piper Center for Personalized Diagnostics, Arizona State University, Tempe, AZ, 85281, USA.
- The Magnetic Resonance Research Center, Arizona State University, Tempe, AZ, 85287, USA.
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40
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Himmel NJ, Letcher JM, Sakurai A, Gray TR, Benson MN, Cox DN. Drosophila menthol sensitivity and the Precambrian origins of transient receptor potential-dependent chemosensation. Philos Trans R Soc Lond B Biol Sci 2019; 374:20190369. [PMID: 31544603 DOI: 10.1098/rstb.2019.0369] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Transient receptor potential (TRP) cation channels are highly conserved, polymodal sensors which respond to a wide variety of stimuli. Perhaps most notably, TRP channels serve critical functions in nociception and pain. A growing body of evidence suggests that transient receptor potential melastatin (TRPM) and transient receptor potential ankyrin (TRPA) thermal and electrophile sensitivities predate the protostome-deuterostome split (greater than 550 Ma). However, TRPM and TRPA channels are also thought to detect modified terpenes (e.g. menthol). Although terpenoids like menthol are thought to be aversive and/or harmful to insects, mechanistic sensitivity studies have been largely restricted to chordates. Furthermore, it is unknown if TRP-menthol sensing is as ancient as thermal and/or electrophile sensitivity. Combining genetic, optical, electrophysiological, behavioural and phylogenetic approaches, we tested the hypothesis that insect TRP channels play a conserved role in menthol sensing. We found that topical application of menthol to Drosophila melanogaster larvae elicits a Trpm- and TrpA1-dependent nocifensive rolling behaviour, which requires activation of Class IV nociceptor neurons. Further, in characterizing the evolution of TRP channels, we put forth the hypotheses that three previously undescribed TRPM channel clades (basal, αTRPM and βTRPM), as well as TRPs with residues critical for menthol sensing, were present in ancestral bilaterians. This article is part of the Theo Murphy meeting issue 'Evolution of mechanisms and behaviour important for pain'.
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Affiliation(s)
- Nathaniel J Himmel
- Neuroscience Institute, Georgia State University, Atlanta, GA 30302, USA
| | - Jamin M Letcher
- Neuroscience Institute, Georgia State University, Atlanta, GA 30302, USA
| | - Akira Sakurai
- Neuroscience Institute, Georgia State University, Atlanta, GA 30302, USA
| | - Thomas R Gray
- Neuroscience Institute, Georgia State University, Atlanta, GA 30302, USA
| | - Maggie N Benson
- Neuroscience Institute, Georgia State University, Atlanta, GA 30302, USA
| | - Daniel N Cox
- Neuroscience Institute, Georgia State University, Atlanta, GA 30302, USA
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41
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Hilton JK, Kim M, Van Horn WD. Structural and Evolutionary Insights Point to Allosteric Regulation of TRP Ion Channels. Acc Chem Res 2019; 52:1643-1652. [PMID: 31149807 DOI: 10.1021/acs.accounts.9b00075] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The familiar pungent taste of spicy food, the refreshing taste of mint, and many other physiological phenomena are mediated by transient receptor potential (TRP) ion channels. TRP channels are a superfamily of ion channels that are sensitive to diverse chemical and physical stimuli and play diverse roles in biology. In addition to chemical regulation, some family members also sense common physical stimuli, such as temperature or pressure. Since their discovery and cloning in the 1990s and 2000s, understanding the molecular mechanisms governing TRP channel function and polymodal regulation has been a consistent but challenging goal. Until recently, a general lack of high-resolution TRP channel structures had significantly limited a molecular understanding of their function. In the past few years, a flood of TRP channel structures have been released, made possible primarily by advances in cryo-electron microscopy (cryo-EM). The boon of many structures has unleashed unparalleled insight into TRP channel architecture. Substantive comparative studies between TRP structures provide snapshots of distinct states such as ligand-free, stabilized by chemical agonists, or antagonists, partially illuminating how a given channel opens and closes. However, the now ∼75 TRP channel structures have ushered in surprising outcomes, including a lack of an apparent general mechanism underlying channel opening and closing among family members. Similarly, the structures reveal a surprising diversity in which chemical ligands bind TRP channels. Several TRP channels are activated by temperature changes in addition to ligand binding. Unraveling mechanisms of thermosensation has proven an elusive challenge to the field. Although some studies point to thermosensitive domains in the transmembrane region of the channels, results have sometimes been contradictory and difficult to interpret; in some cases, a domain that proves essential for thermal sensitivity in one context can be entirely removed from the channel without affecting thermosensation in another context. These results are not amenable to simple interpretations and point to allosteric networks of regulation within the channel structure. TRP channels have evolved to be fine-tuned for the needs of a species in its environmental niche, a fact that has been both a benefit and burden in unlocking their molecular features. Functional evolutionary divergence has presented challenges for studying TRP channels, as orthologs from different species can give conflicting experimental results. However, this diversity can also be examined comparatively to decipher the basis for functional differences. As with structural biology, untangling the similarities and differences resulting from evolutionary pressure between species has been a rich source of data guiding the field. This Account will contextualize the existing biochemical and functional data with an eye to evolutionary data and couple these insights with emerging structural biology to better understand the molecular mechanisms behind chemical and physical regulation of TRP channels.
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Affiliation(s)
- Jacob K. Hilton
- School of Molecular Sciences, Arizona State University, Tempe, Arizona 85287, United States
- The Biodesign Institute Centers for Personalized Diagnostics and Mechanisms of Evolution, Arizona State University, Tempe, Arizona 85281, United States
| | - Minjoo Kim
- School of Molecular Sciences, Arizona State University, Tempe, Arizona 85287, United States
- The Biodesign Institute Centers for Personalized Diagnostics and Mechanisms of Evolution, Arizona State University, Tempe, Arizona 85281, United States
| | - Wade D. Van Horn
- School of Molecular Sciences, Arizona State University, Tempe, Arizona 85287, United States
- The Biodesign Institute Centers for Personalized Diagnostics and Mechanisms of Evolution, Arizona State University, Tempe, Arizona 85281, United States
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42
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González-Muñiz R, Bonache MA, Martín-Escura C, Gómez-Monterrey I. Recent Progress in TRPM8 Modulation: An Update. Int J Mol Sci 2019; 20:ijms20112618. [PMID: 31141957 PMCID: PMC6600640 DOI: 10.3390/ijms20112618] [Citation(s) in RCA: 64] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Revised: 05/24/2019] [Accepted: 05/25/2019] [Indexed: 12/30/2022] Open
Abstract
The transient receptor potential melastatin subtype 8 (TRPM8) is a nonselective, multimodal ion channel, activated by low temperatures (<28 °C), pressure, and cooling compounds (menthol, icilin). Experimental evidences indicated a role of TRPM8 in cold thermal transduction, different life-threatening tumors, and other pathologies, including migraine, urinary tract dysfunction, dry eye disease, and obesity. Hence, the modulation of the TRPM8 channel could be essential in order to understand its implications in these pathologies and for therapeutic intervention. This short review will cover recent progress on the TRPM8 agonists and antagonists, describing newly reported chemotypes, and their application in the pharmacological characterization of TRPM8 in health and disease. The recently described structures of the TRPM8 channel alone or complexed with known agonists and PIP2 are also discussed.
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Affiliation(s)
| | - M Angeles Bonache
- Instituto de Química Médica, IQM-CSIC. Juan de la Cierva 3, 28006 Madrid, Spain.
| | | | - Isabel Gómez-Monterrey
- Dipartimento di Farmacia, Università "Federico II" de Napoli, Via D. Montesano 49, 80131 Naples, Italy.
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43
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Voets T. Frozen images of a cool channel with icy compounds. Cell Calcium 2019; 80:189-191. [PMID: 31104783 DOI: 10.1016/j.ceca.2019.04.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Accepted: 04/20/2019] [Indexed: 10/26/2022]
Affiliation(s)
- Thomas Voets
- Laboratory of Ion Channel Research, VIB Center for Brain and Disease Research & Department of Cellular and Molecular Medicine, University of Leuven, Leuven, Belgium.
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44
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Zhang ZM, Wu XL, Zhang GY, Ma X, He DX. Functional food development: Insights from TRP channels. J Funct Foods 2019. [DOI: 10.1016/j.jff.2019.03.023] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
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45
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Fluorescence-Based Functional Assays for Ca 2+-Permeable ThermoTRP Channels. Methods Mol Biol 2019. [PMID: 31028676 DOI: 10.1007/978-1-4939-9446-5_7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
Abstract
Transient receptor potential (TRP) ion channels are involved in a variety of fundamental physiological processes, and their malfunction produces numerous human diseases. Therefore, these proteins represent a class of attractive drug targets and a class of important off-targets for in vitro pharmacological profiling. In the past decades, the rapid progress in emerging functional assays and instrumentation has enabled to readily monitor thermoTRP channel activity, and to develop high throughput screening (HTS) assays for TPR drug discovery. Chronologically, functional methods for ion channels include the ligand binding assay, flux-based assay, electrophysiology, fluorescence-based assays, and, more recently, automated electrophysiological assays. Here we described the methodology used to monitor the functionality of two thermoTRPs, TRPV1 and TRPM8, based on Ca2+ microfluorography using a 96-well fluorescence plate reader that allows the implementation of a medium- to high-throughput format ideal for drug screening.
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46
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Yin Y, Le SC, Hsu AL, Borgnia MJ, Yang H, Lee SY. Structural basis of cooling agent and lipid sensing by the cold-activated TRPM8 channel. Science 2019; 363:eaav9334. [PMID: 30733385 PMCID: PMC6478609 DOI: 10.1126/science.aav9334] [Citation(s) in RCA: 153] [Impact Index Per Article: 30.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Accepted: 01/27/2019] [Indexed: 12/14/2022]
Abstract
Transient receptor potential melastatin member 8 (TRPM8) is a calcium ion (Ca2+)-permeable cation channel that serves as the primary cold and menthol sensor in humans. Activation of TRPM8 by cooling compounds relies on allosteric actions of agonist and membrane lipid phosphatidylinositol 4,5-bisphosphate (PIP2), but lack of structural information has thus far precluded a mechanistic understanding of ligand and lipid sensing by TRPM8. Using cryo-electron microscopy, we determined the structures of TRPM8 in complex with the synthetic cooling compound icilin, PIP2, and Ca2+, as well as in complex with the menthol analog WS-12 and PIP2 Our structures reveal the binding sites for cooling agonists and PIP2 in TRPM8. Notably, PIP2 binds to TRPM8 in two different modes, which illustrate the mechanism of allosteric coupling between PIP2 and agonists. This study provides a platform for understanding the molecular mechanism of TRPM8 activation by cooling agents.
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Affiliation(s)
- Ying Yin
- Department of Biochemistry, Duke University School of Medicine, Durham, NC, 27710, USA
| | - Son C Le
- Department of Biochemistry, Duke University School of Medicine, Durham, NC, 27710, USA
| | - Allen L Hsu
- Genome Integrity and Structural Biology Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, NC 27709, USA
| | - Mario J Borgnia
- Department of Biochemistry, Duke University School of Medicine, Durham, NC, 27710, USA
- Genome Integrity and Structural Biology Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, NC 27709, USA
| | - Huanghe Yang
- Department of Biochemistry, Duke University School of Medicine, Durham, NC, 27710, USA
| | - Seok-Yong Lee
- Department of Biochemistry, Duke University School of Medicine, Durham, NC, 27710, USA.
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47
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The Immunosuppressant Macrolide Tacrolimus Activates Cold-Sensing TRPM8 Channels. J Neurosci 2018; 39:949-969. [PMID: 30545944 DOI: 10.1523/jneurosci.1726-18.2018] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Revised: 11/02/2018] [Accepted: 11/18/2018] [Indexed: 12/30/2022] Open
Abstract
TRPM8 is a polymodal, nonselective cation channel activated by cold temperature and cooling agents that plays a critical role in the detection of environmental cold. We found that TRPM8 is a pharmacological target of tacrolimus (FK506), a macrolide immunosuppressant with several clinical uses, including the treatment of organ rejection following transplants, treatment of atopic dermatitis, and dry eye disease. Tacrolimus is an inhibitor of the phosphatase calcineurin, an action shared with cyclosporine. Tacrolimus activates TRPM8 channels in different species, including humans, and sensitizes their response to cold temperature by inducing a leftward shift in the voltage-dependent activation curve. The effects of tacrolimus on purified TRPM8 in lipid bilayers demonstrates conclusively that it has a direct gating effect. Moreover, the lack of effect of cyclosporine rules out the canonical signaling pathway involving the phosphatase calcineurin. Menthol (TRPM8-Y745H)- and icilin (TRPM8-N799A)-insensitive mutants were also activated by tacrolimus, suggesting a different binding site. In cultured mouse DRG neurons, tacrolimus evokes an increase in intracellular calcium almost exclusively in cold-sensitive neurons, and these responses were drastically blunted in Trpm8 KO mice or after the application of TRPM8 antagonists. Cutaneous and corneal cold thermoreceptor endings are also activated by tacrolimus, and tacrolimus solutions trigger blinking and cold-evoked behaviors. Together, our results identify TRPM8 channels in sensory neurons as molecular targets of the immunosuppressant tacrolimus. The actions of tacrolimus on TRPM8 resemble those of menthol but likely involve interactions with other channel residues.SIGNIFICANCE STATEMENT TRPM8 is a polymodal TRP channel involved in cold temperature sensing, thermoregulation, and cold pain. TRPM8 is also involved in the pathophysiology of dry eye disease, and TRPM8 activation has antiallodynic and antipruritic effects, making it a prime therapeutic target in several cutaneous and neural diseases. We report the direct agonist effect of tacrolimus, a potent natural immunosuppressant with multiple clinical applications, on TRPM8 activity. This interaction represents a novel neuroimmune interface. The identification of a clinically approved drug with agonist activity on TRPM8 channels could be used experimentally to probe the function of TRPM8 in humans. Our findings may explain some of the sensory and anti-inflammatory effects described for this drug in the skin and the eye surface.
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48
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Zhang X, Hu M, Yang Y, Xu H. Organellar TRP channels. Nat Struct Mol Biol 2018; 25:1009-1018. [PMID: 30374082 DOI: 10.1038/s41594-018-0148-z] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Accepted: 09/28/2018] [Indexed: 02/08/2023]
Abstract
Mammalian transient receptor potential (TRP) channels mediate Ca2+ flux and voltage changes across membranes in response to environmental and cellular signals. At the plasma membrane, sensory TRPs act as neuronal detectors of physical and chemical environmental signals, and receptor-operated (metabotropic) TRPs decode extracellular neuroendocrine cues to control body homeostasis. In intracellular membranes, such as those in lysosomes, organellar TRPs respond to compartment-derived signals to control membrane trafficking, signal transduction, and organelle function. Complementing mouse and human genetics and high-resolution structural approaches, physiological studies employing natural agonists and synthetic inhibitors have become critical in resolving the in vivo functions of metabotropic, sensory, and organellar TRPs.
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Affiliation(s)
- Xiaoli Zhang
- Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, MI, USA
| | - Meiqin Hu
- Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, MI, USA.,Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, China
| | - Yexin Yang
- Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, MI, USA
| | - Haoxing Xu
- Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, MI, USA.
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49
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Startek JB, Voets T, Talavera K. To flourish or perish: evolutionary TRiPs into the sensory biology of plant-herbivore interactions. Pflugers Arch 2018; 471:213-236. [PMID: 30229297 DOI: 10.1007/s00424-018-2205-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Revised: 08/31/2018] [Accepted: 09/06/2018] [Indexed: 12/18/2022]
Abstract
The interactions between plants and their herbivores are highly complex systems generating on one side an extraordinary diversity of plant protection mechanisms and on the other side sophisticated consumer feeding strategies. Herbivores have evolved complex, integrative sensory systems that allow them to distinguish between food sources having mere bad flavors from the actually toxic ones. These systems are based on the senses of taste, olfaction and somatosensation in the oral and nasal cavities, and on post-ingestive chemosensory mechanisms. The potential ability of plant defensive chemical traits to induce tissue damage in foragers is mainly encoded in the latter through chemesthetic sensations such as burning, pain, itch, irritation, tingling, and numbness, all of which induce innate aversive behavioral responses. Here, we discuss the involvement of transient receptor potential (TRP) channels in the chemosensory mechanisms that are at the core of complex and fascinating plant-herbivore ecological networks. We review how "sensory" TRPs are activated by a myriad of plant-derived compounds, leading to cation influx, membrane depolarization, and excitation of sensory nerve fibers of the oronasal cavities in mammals and bitter-sensing cells in insects. We also illustrate how TRP channel expression patterns and functionalities vary between species, leading to intriguing evolutionary adaptations to the specific habitats and life cycles of individual organisms.
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Affiliation(s)
- Justyna B Startek
- Laboratory of Ion Channel Research, Department of Cellular and Molecular Medicine, KU Leuven, Herestraat 49, Campus Gasthuisberg O&N1 bus 802, 3000, Leuven, Belgium. .,VIB Center for Brain & Disease Research, Leuven, Belgium.
| | - Thomas Voets
- Laboratory of Ion Channel Research, Department of Cellular and Molecular Medicine, KU Leuven, Herestraat 49, Campus Gasthuisberg O&N1 bus 802, 3000, Leuven, Belgium.,VIB Center for Brain & Disease Research, Leuven, Belgium
| | - Karel Talavera
- Laboratory of Ion Channel Research, Department of Cellular and Molecular Medicine, KU Leuven, Herestraat 49, Campus Gasthuisberg O&N1 bus 802, 3000, Leuven, Belgium.,VIB Center for Brain & Disease Research, Leuven, Belgium
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50
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Sághy É, Payrits M, Bíró-Sütő T, Skoda-Földes R, Szánti-Pintér E, Erostyák J, Makkai G, Sétáló G, Kollár L, Kőszegi T, Csepregi R, Szolcsányi J, Helyes Z, Szőke É. Carboxamido steroids inhibit the opening properties of transient receptor potential ion channels by lipid raft modulation. J Lipid Res 2018; 59:1851-1863. [PMID: 30093524 PMCID: PMC6168298 DOI: 10.1194/jlr.m084723] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 08/03/2018] [Indexed: 11/20/2022] Open
Abstract
Transient Receptor Potential (TRP) cation channels, like the TRP Vanilloid 1 (TRPV1) and TRP Ankyrin 1 (TRPA1), are expressed on primary sensory neurons. These thermosensor channels play a role in pain processing. We have provided evidence previously that lipid raft disruption influenced the TRP channel activation, and a carboxamido-steroid compound (C1) inhibited TRPV1 activation. Therefore, our aim was to investigate whether this compound exerts its effect through lipid raft disruption and the steroid backbone (C3) or whether altered position of the carboxamido group (C2) influences the inhibitory action by measuring Ca2+ transients on isolated neurons and calcium-uptake on receptor-expressing CHO cells. Membrane cholesterol content was measured by filipin staining and membrane polarization by fluorescence spectroscopy. Both the percentage of responsive cells and the magnitude of the intracellular Ca2+ enhancement evoked by the TRPV1 agonist capsaicin were significantly inhibited after C1 and C2 incubation, but not after C3 administration. C1 was able to reduce other TRP channel activation as well. The compounds induced cholesterol depletion in CHO cells, but only C1 induced changes in membrane polarization. The inhibitory action of the compounds on TRP channel activation develops by lipid raft disruption, and the presence and the position of the carboxamido group is essential.
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Affiliation(s)
- Éva Sághy
- Department of Pharmacology and Pharmacotherapy, University of Pécs, Hungary.,Medical School, János Szentágothai Research Center and Centre for Neuroscience, University of Pécs, Hungary.,Department of Pharmacology and Pharmacotherapy, Semmelweis University, Budapest, Hungary
| | - Maja Payrits
- Department of Pharmacology and Pharmacotherapy, University of Pécs, Hungary.,Medical School, János Szentágothai Research Center and Centre for Neuroscience, University of Pécs, Hungary
| | - Tünde Bíró-Sütő
- Department of Pharmacology and Pharmacotherapy, University of Pécs, Hungary.,Medical School, János Szentágothai Research Center and Centre for Neuroscience, University of Pécs, Hungary
| | - Rita Skoda-Földes
- Department of Organic Chemistry, Institute of Chemistry, University of Pannonia, Veszprém, Hungary
| | - Eszter Szánti-Pintér
- Department of Organic Chemistry, Institute of Chemistry, University of Pannonia, Veszprém, Hungary
| | - János Erostyák
- Medical School, János Szentágothai Research Center and Centre for Neuroscience, University of Pécs, Hungary.,Department of Experimental Physics, University of Pécs, Hungary
| | - Géza Makkai
- Medical School, János Szentágothai Research Center and Centre for Neuroscience, University of Pécs, Hungary.,Department of Experimental Physics, University of Pécs, Hungary
| | - György Sétáló
- Medical School, János Szentágothai Research Center and Centre for Neuroscience, University of Pécs, Hungary.,Department of Medical Biology, University of Pécs, Hungary
| | - László Kollár
- Department of Inorganic Chemistry and MTA-PTE Research Group for Selective Chemical Syntheses, University of Pécs, Hungary
| | - Tamás Kőszegi
- Medical School, János Szentágothai Research Center and Centre for Neuroscience, University of Pécs, Hungary.,Department of Laboratory Medicine, University of Pécs, Hungary
| | - Rita Csepregi
- Medical School, János Szentágothai Research Center and Centre for Neuroscience, University of Pécs, Hungary.,Department of Laboratory Medicine, University of Pécs, Hungary
| | - János Szolcsányi
- Department of Pharmacology and Pharmacotherapy, University of Pécs, Hungary.,Medical School, János Szentágothai Research Center and Centre for Neuroscience, University of Pécs, Hungary
| | - Zsuzsanna Helyes
- Department of Pharmacology and Pharmacotherapy, University of Pécs, Hungary.,Medical School, János Szentágothai Research Center and Centre for Neuroscience, University of Pécs, Hungary.,National Brain Research Program-2 Chronic Pain Research Group, Pécs, Hungary
| | - Éva Szőke
- Department of Pharmacology and Pharmacotherapy, University of Pécs, Hungary .,Medical School, János Szentágothai Research Center and Centre for Neuroscience, University of Pécs, Hungary.,National Brain Research Program-2 Chronic Pain Research Group, Pécs, Hungary
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