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Liénard MA, Baez-Nieto D, Tsai CC, Valencia-Montoya WA, Werin B, Johanson U, Lassance JM, Pan JQ, Yu N, Pierce NE. TRPA5 encodes a thermosensitive ankyrin ion channel receptor in a triatomine insect. iScience 2024; 27:109541. [PMID: 38577108 PMCID: PMC10993193 DOI: 10.1016/j.isci.2024.109541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Revised: 02/28/2024] [Accepted: 03/18/2024] [Indexed: 04/06/2024] Open
Abstract
As ectotherms, insects need heat-sensitive receptors to monitor environmental temperatures and facilitate thermoregulation. We show that TRPA5, a class of ankyrin transient receptor potential (TRP) channels absent in dipteran genomes, may function as insect heat receptors. In the triatomine bug Rhodnius prolixus (order: Hemiptera), a vector of Chagas disease, the channel RpTRPA5B displays a uniquely high thermosensitivity, with biophysical determinants including a large channel activation enthalpy change (72 kcal/mol), a high temperature coefficient (Q10 = 25), and in vitro temperature-induced currents from 53°C to 68°C (T0.5 = 58.6°C), similar to noxious TRPV receptors in mammals. Monomeric and tetrameric ion channel structure predictions show reliable parallels with fruit fly dTRPA1, with structural uniqueness in ankyrin repeat domains, the channel selectivity filter, and potential TRP functional modulator regions. Overall, the finding of a member of TRPA5 as a temperature-activated receptor illustrates the diversity of insect molecular heat detectors.
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Affiliation(s)
- Marjorie A. Liénard
- Department of Biology, Lund University, 22362 Lund, Sweden
- Department of Organismic and Evolutionary Biology and Museum of Comparative Zoology, Harvard University, Cambridge, MA 02138, USA
- Broad Institute, Cambridge, MA 02142, USA
| | - David Baez-Nieto
- Stanley Center for Psychiatric Research, Broad Institute, Cambridge, MA 02142, USA
| | - Cheng-Chia Tsai
- Department of Applied Physics and Applied Mathematics, Columbia University, New York, NY 10027, USA
| | - Wendy A. Valencia-Montoya
- Department of Organismic and Evolutionary Biology and Museum of Comparative Zoology, Harvard University, Cambridge, MA 02138, USA
| | - Balder Werin
- Division of Biochemistry and Structural Biology, Department of Chemistry, Lund University, 22362 Lund, Sweden
| | - Urban Johanson
- Division of Biochemistry and Structural Biology, Department of Chemistry, Lund University, 22362 Lund, Sweden
| | - Jean-Marc Lassance
- Department of Organismic and Evolutionary Biology and Museum of Comparative Zoology, Harvard University, Cambridge, MA 02138, USA
- Laboratory of Evolutionary Neuroethology, GIGA Institute, University of Liège, 4000 Liège, Belgium
| | - Jen Q. Pan
- Stanley Center for Psychiatric Research, Broad Institute, Cambridge, MA 02142, USA
| | - Nanfang Yu
- Department of Applied Physics and Applied Mathematics, Columbia University, New York, NY 10027, USA
| | - Naomi E. Pierce
- Department of Organismic and Evolutionary Biology and Museum of Comparative Zoology, Harvard University, Cambridge, MA 02138, USA
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Amaya-Rodriguez CA, Carvajal-Zamorano K, Bustos D, Alegría-Arcos M, Castillo K. A journey from molecule to physiology and in silico tools for drug discovery targeting the transient receptor potential vanilloid type 1 (TRPV1) channel. Front Pharmacol 2024; 14:1251061. [PMID: 38328578 PMCID: PMC10847257 DOI: 10.3389/fphar.2023.1251061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Accepted: 12/14/2023] [Indexed: 02/09/2024] Open
Abstract
The heat and capsaicin receptor TRPV1 channel is widely expressed in nerve terminals of dorsal root ganglia (DRGs) and trigeminal ganglia innervating the body and face, respectively, as well as in other tissues and organs including central nervous system. The TRPV1 channel is a versatile receptor that detects harmful heat, pain, and various internal and external ligands. Hence, it operates as a polymodal sensory channel. Many pathological conditions including neuroinflammation, cancer, psychiatric disorders, and pathological pain, are linked to the abnormal functioning of the TRPV1 in peripheral tissues. Intense biomedical research is underway to discover compounds that can modulate the channel and provide pain relief. The molecular mechanisms underlying temperature sensing remain largely unknown, although they are closely linked to pain transduction. Prolonged exposure to capsaicin generates analgesia, hence numerous capsaicin analogs have been developed to discover efficient analgesics for pain relief. The emergence of in silico tools offered significant techniques for molecular modeling and machine learning algorithms to indentify druggable sites in the channel and for repositioning of current drugs aimed at TRPV1. Here we recapitulate the physiological and pathophysiological functions of the TRPV1 channel, including structural models obtained through cryo-EM, pharmacological compounds tested on TRPV1, and the in silico tools for drug discovery and repositioning.
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Affiliation(s)
- Cesar A. Amaya-Rodriguez
- Centro Interdisciplinario de Neurociencia de Valparaíso, Facultad de Ciencias, Universidad de Valparaíso, Valparaíso, Chile
- Departamento de Fisiología y Comportamiento Animal, Facultad de Ciencias Naturales, Exactas y Tecnología, Universidad de Panamá, Ciudad de Panamá, Panamá
| | - Karina Carvajal-Zamorano
- Centro Interdisciplinario de Neurociencia de Valparaíso, Facultad de Ciencias, Universidad de Valparaíso, Valparaíso, Chile
| | - Daniel Bustos
- Centro de Investigación de Estudios Avanzados del Maule (CIEAM), Vicerrectoría de Investigación y Postgrado Universidad Católica del Maule, Talca, Chile
- Laboratorio de Bioinformática y Química Computacional, Departamento de Medicina Traslacional, Facultad de Medicina, Universidad Católica del Maule, Talca, Chile
| | - Melissa Alegría-Arcos
- Núcleo de Investigación en Data Science, Facultad de Ingeniería y Negocios, Universidad de las Américas, Santiago, Chile
| | - Karen Castillo
- Centro Interdisciplinario de Neurociencia de Valparaíso, Facultad de Ciencias, Universidad de Valparaíso, Valparaíso, Chile
- Centro de Investigación de Estudios Avanzados del Maule (CIEAM), Vicerrectoría de Investigación y Postgrado Universidad Católica del Maule, Talca, Chile
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Bassetto CAZ, Pinto BI, Latorre R, Bezanilla F. Ion channel thermodynamics studied with temperature jumps measured at the cell membrane. Biophys J 2023; 122:661-671. [PMID: 36654507 PMCID: PMC9989882 DOI: 10.1016/j.bpj.2023.01.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Revised: 11/29/2022] [Accepted: 01/12/2023] [Indexed: 01/19/2023] Open
Abstract
Perturbing the temperature of a system modifies its energy landscape, thus providing a ubiquitous tool to understand biological processes. Here, we developed a framework to generate sudden temperature jumps (Tjumps) and sustained temperature steps (Tsteps) to study the temperature dependence of membrane proteins under voltage clamp while measuring the membrane temperature. Utilizing the melanin under the Xenopus laevis oocytes membrane as a photothermal transducer, we achieved short Tjumps up to 9°C in less than 1.5 ms and constant Tsteps for durations up to 150 ms. We followed the temperature at the membrane with sub-ms time resolution by measuring the time course of membrane capacitance, which is linearly related to temperature. We applied Tjumps in Kir1.1 isoform b, which reveals a highly temperature-sensitive blockage relief, and characterized the effects of Tsteps on the temperature-sensitive channels TRPM8 and TRPV1. These newly developed approaches provide a general tool to study membrane protein thermodynamics.
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Affiliation(s)
- Carlos A Z Bassetto
- Department of Biochemistry and Molecular Biology, University of Chicago, Chicago, Illinois
| | - Bernardo I Pinto
- Department of Biochemistry and Molecular Biology, University of Chicago, Chicago, Illinois
| | - Ramon Latorre
- Centro Interdisciplinario de Neurociencias de Valparaiso, Universidad de Valparaiso, Valparaiso, Chile.
| | - Francisco Bezanilla
- Department of Biochemistry and Molecular Biology, University of Chicago, Chicago, Illinois; Centro Interdisciplinario de Neurociencias de Valparaiso, Universidad de Valparaiso, Valparaiso, Chile.
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4
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The human TRPA1 intrinsic cold and heat sensitivity involves separate channel structures beyond the N-ARD domain. Nat Commun 2022; 13:6113. [PMID: 36253390 PMCID: PMC9576766 DOI: 10.1038/s41467-022-33876-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Accepted: 10/04/2022] [Indexed: 12/24/2022] Open
Abstract
TRP channels sense temperatures ranging from noxious cold to noxious heat. Whether specialized TRP thermosensor modules exist and how they control channel pore gating is unknown. We studied purified human TRPA1 (hTRPA1) truncated proteins to gain insight into the temperature gating of hTRPA1. In patch-clamp bilayer recordings, ∆1-688 hTRPA1, without the N-terminal ankyrin repeat domain (N-ARD), was more sensitive to cold and heat, whereas ∆1-854 hTRPA1, also lacking the S1-S4 voltage sensing-like domain (VSLD), gained sensitivity to cold but lost its heat sensitivity. In hTRPA1 intrinsic tryptophan fluorescence studies, cold and heat evoked rearrangement of VSLD and the C-terminus domain distal to the transmembrane pore domain S5-S6 (CTD). In whole-cell electrophysiology experiments, replacement of the CTD located cysteines 1021 and 1025 with alanine modulated hTRPA1 cold responses. It is proposed that hTRPA1 CTD harbors cold and heat sensitive domains allosterically coupled to the S5-S6 pore region and the VSLD, respectively.
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Ramkumar V, Sheth S, Dhukhwa A, Al Aameri R, Rybak L, Mukherjea D. Transient Receptor Potential Channels and Auditory Functions. Antioxid Redox Signal 2022; 36:1158-1170. [PMID: 34465184 PMCID: PMC9221156 DOI: 10.1089/ars.2021.0191] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Significance: Transient receptor potential (TRP) channels are cation-gated channels that serve as detectors of various sensory modalities, such as pain, heat, cold, and taste. These channels are expressed in the inner ear, suggesting that they could also contribute to the perception of sound. This review provides more details on the different types of TRP channels that have been identified in the cochlea to date, focusing on their cochlear distribution, regulation, and potential contributions to auditory functions. Recent Advances: To date, the effect of TRP channels on normal cochlear physiology in mammals is still unclear. These channels contribute, to a limited extent, to normal cochlear physiology such as the hair cell mechanoelectrical transduction channel and strial functions. More detailed information on a number of these channels in the cochlea awaits future studies. Several laboratories focusing on TRPV1 channels have shown that they are responsive to cochlear stressors, such as ototoxic drugs and noise, and regulate cytoprotective and/or cell death pathways. TRPV1 expression in the cochlea is under control of oxidative stress (produced primarily by NOX3 NADPH oxidase) as well as STAT1 and STAT3 transcription factors, which differentially modulate inflammatory and apoptotic signals in the cochlea. Inhibition of oxidative stress or inflammation reduces the expression of TRPV1 channels and protects against cochlear damage and hearing loss. Critical Issues: TRPV1 channels are activated by both capsaicin and cisplatin, which produce differential effects on the inner ear. How these differential actions are produced is yet to be determined. It is clear that TRPV1 is an essential component of cisplatin ototoxicity as knockdown of these channels protects against hearing loss. In contrast, activation of TRPV1 by capsaicin protected against subsequent hearing loss induced by cisplatin. The cellular targets that are influenced by these two drugs to account for their differential profiles need to be fully elucidated. Furthermore, the potential involvement of different TRP channels present in the cochlea in regulating cisplatin ototoxicity needs to be determined. Future Directions: TRPV1 has been shown to mediate the entry of aminoglycosides into the hair cells. Thus, novel otoprotective strategies could involve designing drugs to inhibit entry of aminoglycosides and possibly other ototoxins into cochlear hair cells. TRP channels, including TRPV1, are expressed on circulating and resident immune cells. These receptors modulate immune cell functions. However, whether they are activated by cochlear stressors to initiate cochlear inflammation and ototoxicity needs to be determined. A better understanding of the function and regulation of these TRP channels in the cochlea could enable development of novel treatments for treating hearing loss. Antioxid. Redox Signal. 36, 1158-1170.
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Affiliation(s)
- Vickram Ramkumar
- Department of Pharmacology, Southern Illinois University School of Medicine, Springfield, Illinois, USA
| | - Sandeep Sheth
- Department of Pharmaceutical Sciences, Larkin University College of Pharmacy, Miami, Florida, USA
| | - Asmita Dhukhwa
- Department of Pharmacology, Southern Illinois University School of Medicine, Springfield, Illinois, USA
| | - Raheem Al Aameri
- Department of Pharmacology, Southern Illinois University School of Medicine, Springfield, Illinois, USA
| | - Leonard Rybak
- Department of Pharmacology, Southern Illinois University School of Medicine, Springfield, Illinois, USA.,Department of Otolaryngology, Southern Illinois University School of Medicine, Springfield, Illinois, USA
| | - Debashree Mukherjea
- Department of Otolaryngology, Southern Illinois University School of Medicine, Springfield, Illinois, USA
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Identification of Key Candidate Genes in Runs of Homozygosity of the Genome of Two Chicken Breeds, Associated with Cold Adaptation. BIOLOGY 2022; 11:biology11040547. [PMID: 35453746 PMCID: PMC9026094 DOI: 10.3390/biology11040547] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Revised: 03/22/2022] [Accepted: 03/31/2022] [Indexed: 11/20/2022]
Abstract
Simple Summary The search for genomic regions related to adaptive abilities preserved in the chicken gene pool of two breeds, which have not been under intensive selection pressure, is of great importance for breeding in the future. This study aimed to identify key candidate genes associated with the adaptation of chickens to cold environments (using the example of the Russian White breed) by using molecular genetic methods. A total of 12 key genes on breed-specific ROH (runs of homozygosity) islands were identified, which may be potential candidate genes associated with the high level of adaptability of chickens to cold environments in the early postnatal period. These genes were associated with lipid metabolism, maintaining body temperature in cold environments, non-shivering thermogenesis and muscle development and are perspectives for further research. Abstract It is well known that the chicken gene pools have high adaptive abilities, including adaptation to cold environments. This research aimed to study the genomic distribution of runs of homozygosity (ROH) in a population of Russian White (RW) chickens as a result of selection for adaptation to cold environments in the early postnatal period, to perform a structural annotation of the discovered breed-specific regions of the genome (compared to chickens of the Amroks breed) and to suggest key candidate genes associated with the adaptation of RW chickens to cold environments. Genotyping of individual samples was performed using Illumina Chicken 60K SNP BeadChip® chips. The search for homozygous regions by individual chromosomes was carried out using the PLINK 1.9 program and the detectRuns R package. Twelve key genes on breed-specific ROH islands were identified. They may be considered as potential candidate genes associated with the high adaptive ability of chickens in cold environments in the early postnatal period. Genes associated with lipid metabolism (SOCS3, NDUFA4, TXNRD2, IGFBP 1, IGFBP 3), maintaining body temperature in cold environments (ADIPOQ, GCGR, TRPM2), non-shivering thermogenesis (RYR2, CAMK2G, STK25) and muscle development (METTL21C) are perspectives for further research. This study contributes to our understanding of the mechanisms of adaptation to cold environments in chickens and provides a molecular basis for selection work.
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Abstract
The transient receptor potential (TRP) channel superfamily consists of a large group of non-selective cation channels that serve as cellular sensors for a wide spectrum of physical and environmental stimuli. The 28 mammalian TRPs, categorized into six subfamilies, including TRPC (canonical), TRPV (vanilloid), TRPM (melastatin), TRPA (ankyrin), TRPML (mucolipin) and TRPP (polycystin), are widely expressed in different cells and tissues. TRPs exhibit a variety of unique features that not only distinguish them from other superfamilies of ion channels, but also confer diverse physiological functions. Located at the plasma membrane or in the membranes of intracellular organelles, TRPs are the cellular safeguards that sense various cell stresses and environmental stimuli and translate this information into responses at the organismal level. Loss- or gain-of-function mutations of TRPs cause inherited diseases and pathologies in different physiological systems, whereas up- or down-regulation of TRPs is associated with acquired human disorders. In this Cell Science at a Glance article and the accompanying poster, we briefly summarize the history of the discovery of TRPs, their unique features, recent advances in the understanding of TRP activation mechanisms, the structural basis of TRP Ca2+ selectivity and ligand binding, as well as potential roles in mammalian physiology and pathology.
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Affiliation(s)
- Lixia Yue
- Calhoun Cardiology Center, Department of Cell Biology, University of Connecticut School of Medicine (UConn Health), Farmington, CT 06030, USA
| | - Haoxing Xu
- Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, MI 48109, USA
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8
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The Role of Thermosensitive Ion Channels in Mammalian Thermoregulation. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2021; 1349:355-370. [DOI: 10.1007/978-981-16-4254-8_16] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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9
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Izutani-Kitano A, Okada Y, Ichikawa K, Reinach PS, Saika S. Alteration of expression pattern of transient receptor potential vanilloid 2 and transient receptor potential vanilloid 3 in ocular surface neoplasm. Taiwan J Ophthalmol 2020; 10:106-110. [PMID: 32874838 PMCID: PMC7442101 DOI: 10.4103/tjo.tjo_12_20] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Accepted: 03/14/2020] [Indexed: 11/04/2022] Open
Abstract
PURPOSE We determined if the immunohistochemical expression pattern of transient receptor potential vanilloid (TRPV) family members and TRP ankyrin 1 (TRPA1) differs among a healthy conjunctival epithelium and diseased epithelia. MATERIALS AND METHODS Subjects include a normal conjunctival epithelium, pterygium epithelium, epithelial dysplasia or carcinoma in situ. RESULTS TRPV1, TRPV4 or TRPA1 was detected in both the cytoplasm and nuclei, or in either the nuclei or cytoplasm, of these different epithelial layers, respectively. There was no difference in the expression pattern of these three TRP isoforms. On the other hand, the expression patterns of TRPV2 and TRPV3 differed dramatically among these different subjects. TRPV2 was observed in the basal layer epithelium of a normal conjunctiva and pterygium. Its pattern was scattered in this region, although TRPV2 was absent throughout most of the dysplastic epithelium. TRPV2 was detected only in some of the suprabasal epithelial cells of a carcinoma in situ. TRPV3 was faintly detected in the cytoplasm of all the cell layers and also in the nuclei of some of the basal cells in a normal conjunctiva and in the pterygia epithelium, while in situ it was uniformly expressed in all of the dysplasia and carcinoma nuclei in all epithelial cell layers. CONCLUSION These results suggest that TRPV2 and TRPV3 expression pattern analysis might be potential diagnostic markers of ocular surface epithelial disorders.
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Affiliation(s)
- Ai Izutani-Kitano
- Department of Ophthalmology, Kihoku Hospital, Wakayama Medical University, Wakayama, Japan
| | - Yuka Okada
- Department of Ophthalmology, School of Medicine, Wakayama Medical University, Wakayama, Japan
| | - Kana Ichikawa
- Department of Ophthalmology, School of Medicine, Wakayama Medical University, Wakayama, Japan
| | - Peter Sol Reinach
- School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, China
| | - Shizuya Saika
- Department of Ophthalmology, School of Medicine, Wakayama Medical University, Wakayama, Japan
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10
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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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11
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Wang S, Geng Q, Huo L, Ma Y, Gao Y, Zhang W, Zhang H, Lv P, Jia Z. Transient Receptor Potential Cation Channel Subfamily Vanilloid 4 and 3 in the Inner Ear Protect Hearing in Mice. Front Mol Neurosci 2019; 12:296. [PMID: 31866822 PMCID: PMC6904345 DOI: 10.3389/fnmol.2019.00296] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2019] [Accepted: 11/20/2019] [Indexed: 01/02/2023] Open
Abstract
The transient receptor potential cation channel, vanilloid type (TRPV) 3, is a member of the TRPV subfamily that is expressed predominantly in the skin, hair follicles, and gastrointestinal tract. It is also distributed in the organ of Corti of the inner ear and colocalizes with TRPV1 or TRPV4, but its role in auditory function is unknown. In the present study, we demonstrate that TRPV3 is expressed in inner hair cells (HCs) but mainly in cochlear outer HCs in mice, with expression limited to the cytoplasm and not detected in stereocilia. We compared the number of HCs as well as distortion product otoacoustic emissions (DPOAE) and auditory brainstem response (ABR) thresholds between TRPV3 knockout (V3KO) and wild-type (V3WT) mice and found that although most mutants (72.3%) had normal hearing, a significant proportion (27.7%) showed impaired hearing associated with loss of cochlear HCs. Compensatory upregulation of TRPV4 in HCs prevented HC damage and kanamycin-induced hearing loss and preserved normal auditory function in most of these mice. Thus, TRPV4 and TRPV3 in cochlear HCs protect hearing in mice; moreover, the results suggest some functional redundancy in the functions of TRPV family members. Our findings provide novel insight into the molecular basis of auditory function in mammals that can be applied to the development of strategies to mitigate hearing loss.
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Affiliation(s)
- Shengnan Wang
- Department of Pharmacology, Hebei Medical University, Shijiazhuang, China.,Center for Innovative Drug Research and Evaluation, Institute of Medical Science and Health, Hebei Medical University, Shijiazhuang, China.,The Key Laboratory of Neural and Vascular Biology, Ministry of Education, Shijiazhuang, China.,The Key Laboratory of New Drug Pharmacology and Toxicology, Shijiazhuang, China
| | - Qiaowei Geng
- Department of Pharmacology, Hebei Medical University, Shijiazhuang, China.,Center for Innovative Drug Research and Evaluation, Institute of Medical Science and Health, Hebei Medical University, Shijiazhuang, China.,The Key Laboratory of Neural and Vascular Biology, Ministry of Education, Shijiazhuang, China.,The Key Laboratory of New Drug Pharmacology and Toxicology, Shijiazhuang, China
| | - Lifang Huo
- Department of Pharmacology, Institute of Chinese Integrative Medicine, Hebei Medical University, Shijiazhuang, China.,Center for Innovative Drug Research and Evaluation, Institute of Medical Science and Health, Hebei Medical University, Shijiazhuang, China.,The Key Laboratory of Neural and Vascular Biology, Ministry of Education, Shijiazhuang, China
| | - Yirui Ma
- Department of Pharmacology, Hebei Medical University, Shijiazhuang, China.,Center for Innovative Drug Research and Evaluation, Institute of Medical Science and Health, Hebei Medical University, Shijiazhuang, China.,The Key Laboratory of Neural and Vascular Biology, Ministry of Education, Shijiazhuang, China.,The Key Laboratory of New Drug Pharmacology and Toxicology, Shijiazhuang, China
| | - Yiting Gao
- Department of Pharmacology, Hebei Medical University, Shijiazhuang, China.,Center for Innovative Drug Research and Evaluation, Institute of Medical Science and Health, Hebei Medical University, Shijiazhuang, China.,The Key Laboratory of Neural and Vascular Biology, Ministry of Education, Shijiazhuang, China.,The Key Laboratory of New Drug Pharmacology and Toxicology, Shijiazhuang, China
| | - Wei Zhang
- Department of Pharmacology, Institute of Chinese Integrative Medicine, Hebei Medical University, Shijiazhuang, China.,Center for Innovative Drug Research and Evaluation, Institute of Medical Science and Health, Hebei Medical University, Shijiazhuang, China.,The Key Laboratory of Neural and Vascular Biology, Ministry of Education, Shijiazhuang, China
| | - Hailin Zhang
- Department of Pharmacology, Hebei Medical University, Shijiazhuang, China.,Center for Innovative Drug Research and Evaluation, Institute of Medical Science and Health, Hebei Medical University, Shijiazhuang, China.,The Key Laboratory of Neural and Vascular Biology, Ministry of Education, Shijiazhuang, China.,The Key Laboratory of New Drug Pharmacology and Toxicology, Shijiazhuang, China
| | - Ping Lv
- Department of Pharmacology, Hebei Medical University, Shijiazhuang, China.,Center for Innovative Drug Research and Evaluation, Institute of Medical Science and Health, Hebei Medical University, Shijiazhuang, China.,The Key Laboratory of Neural and Vascular Biology, Ministry of Education, Shijiazhuang, China.,The Key Laboratory of New Drug Pharmacology and Toxicology, Shijiazhuang, China
| | - Zhanfeng Jia
- Department of Pharmacology, Hebei Medical University, Shijiazhuang, China.,Center for Innovative Drug Research and Evaluation, Institute of Medical Science and Health, Hebei Medical University, Shijiazhuang, China.,The Key Laboratory of Neural and Vascular Biology, Ministry of Education, Shijiazhuang, China.,The Key Laboratory of New Drug Pharmacology and Toxicology, Shijiazhuang, China
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12
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Schuh CMAP, Benso B, Aguayo S. Potential Novel Strategies for the Treatment of Dental Pulp-Derived Pain: Pharmacological Approaches and Beyond. Front Pharmacol 2019; 10:1068. [PMID: 31620000 PMCID: PMC6759635 DOI: 10.3389/fphar.2019.01068] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Accepted: 08/22/2019] [Indexed: 12/18/2022] Open
Abstract
The diagnosis and management of pain is an everyday occurrence in dentistry, and its effective control is essential to ensure the wellbeing of patients. Most tooth-associated pain originates from the dental pulp, a highly vascularized and innervated tissue, which is encased within mineralized dentin. It plays a crucial role in the sensing of stimuli from the local environment, such as infections (i.e. dental caries) and traumatic injury, leading to a local inflammatory response and subsequently to an increase in intra-pulp pressure, activating nerve endings. However, thermal, chemical, and mechanical stimuli also have the ability to generate dental pulp pain, which presents mechanisms highly specific to this tissue and which have to be considered in pain management. Traditionally, the management of dental pulp pain has mostly been pharmacological, using non-steroidal anti-inflammatory drugs (NSAIDs) and opioids, or restorative (i.e. removal of dental caries), or a combination of both. Both research areas continuously present novel and creative approaches. This includes the modulation of thermo-sensitive transient receptor potential cation channels (TRP) by newly designed drugs in pharmacological research, as well as the use of novel biomaterials, stem cells, exosomes and physical stimulation to obtain pulp regeneration in regenerative medicine. Therefore, the aim of this review is to present an up-to-date account of causes underlying dental pain, novel treatments involving the control of pain and inflammation and the induction of pulp regeneration, as well as insights in pain in dentistry from the physiological, pharmacological, regenerative and clinical perspectives.
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Affiliation(s)
- Christina M. A. P. Schuh
- Centro de Medicina Regenerativa, Facultad de Medicina Clínica Alemana-Universidad del Desarrollo, Santiago, Chile
| | - Bruna Benso
- School of Dentistry, Faculty of Medicine, Pontificia Universidad Catolica de Chile, Santiago, Chile
- Department of Physiology, Faculty of Medicine, Universidad Austral de Chile, Millennium Nucleus of Ion Channels Associated Diseases (MiNICAD), Valdivia, Chile
| | - Sebastian Aguayo
- School of Dentistry, Faculty of Medicine, Pontificia Universidad Catolica de Chile, Santiago, Chile
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13
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Wen H, Zheng W. Decrypting the Heat Activation Mechanism of TRPV1 Channel by Molecular Dynamics Simulation. Biophys J 2019; 114:40-52. [PMID: 29320695 DOI: 10.1016/j.bpj.2017.10.034] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Revised: 10/11/2017] [Accepted: 10/23/2017] [Indexed: 11/29/2022] Open
Abstract
As a prototype cellular sensor, the TRPV1 cation channel undergoes a closed-to-open gating transition in response to various physical and chemical stimuli including noxious heat. Despite recent progress, the molecular mechanism of heat activation of TRPV1 gating remains enigmatic. Toward decrypting the structural basis of TRPV1 heat activation, we performed extensive molecular dynamics simulations (with cumulative simulation time of ∼11 μs) for the wild-type channel and a constitutively active double mutant at different temperatures (30, 60, and 72°C), starting from a high-resolution closed-channel structure of TRPV1 solved by cryo-electron microscopy. In the wild-type simulations, we observed heat-activated conformational changes (e.g., expansion or contraction) in various key domains of TRPV1 (e.g., the S2-S3 and S4-S5 linkers) to prime the channel for gating. These conformational changes involve a number of dynamic hydrogen-bond interactions that were validated with previous mutational studies. Next, our mutant simulations observed channel opening after a series of conformational changes that propagate from the channel periphery to the channel pore via key intermediate domains (including the S2-S3 and S4-S5 linkers). The gating transition is accompanied by a large increase in the protein-water electrostatic interaction energy, which supports the contribution of desolvation of polar/charged residues to the temperature-sensitive TRPV1 gating. Taken together, our molecular dynamics simulations and analyses offered, to our knowledge, new structural, dynamic, and energetic information to guide future mutagenesis and functional studies of the TRPV1 channels and development of TRPV1-targeting drugs.
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Affiliation(s)
- Han Wen
- Department of Physics, State University of New York at Buffalo, Buffalo, New York
| | - Wenjun Zheng
- Department of Physics, State University of New York at Buffalo, Buffalo, New York.
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14
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Canul-Sánchez JA, Hernández-Araiza I, Hernández-García E, Llorente I, Morales-Lázaro SL, Islas LD, Rosenbaum T. Different agonists induce distinct single-channel conductance states in TRPV1 channels. J Gen Physiol 2018; 150:1735-1746. [PMID: 30409787 PMCID: PMC6279355 DOI: 10.1085/jgp.201812141] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Revised: 09/20/2018] [Accepted: 10/16/2018] [Indexed: 11/20/2022] Open
Abstract
TRPV1 is a polymodal ion channel that can be activated by lysophosphatidic acid (LPA), resulting in pain. Here we show that TRPV1 activation by LPA promotes a distinct open state with a different single-channel conductance from that induced by capsaicin. The TRPV1 ion channel is a membrane protein that is expressed in primary afferent nociceptors, where it is activated by a diverse array of stimuli. Our prior work has shown that this channel is activated by lysophosphatidic acid (LPA), an unsaturated lysophospholipid that is produced endogenously and released under certain pathophysiological conditions, resulting in the sensation of pain. Macroscopic currents activated by saturating concentrations of LPA applied to excised membrane patches are larger in magnitude than those activated by saturating concentrations of capsaicin, which causes near-maximal TRPV1 open probability. Here we show that activation of TRPV1 by LPA is associated with a higher single-channel conductance than activation by capsaicin. We also observe that the effects of LPA on TRPV1 are not caused by an increase in the surface charge nor are they mimicked by a structurally similar lipid, ruling out the contribution of change in membrane properties. Finally, we demonstrate that the effects of LPA on the unitary conductance of TRPV1 depend upon the presence of a positively charged residue in the C terminus of the channel, suggesting that LPA induces a distinct conformational change.
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Affiliation(s)
- Jesús Aldair Canul-Sánchez
- Departamento de Neurociencia Cognitiva, División Neurociencias, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, México City, México
| | - Ileana Hernández-Araiza
- Departamento de Neurociencia Cognitiva, División Neurociencias, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, México City, México
| | - Enrique Hernández-García
- Departamento de Neurociencia Cognitiva, División Neurociencias, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, México City, México
| | - Itzel Llorente
- Departamento de Neurociencia Cognitiva, División Neurociencias, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, México City, México
| | - Sara L Morales-Lázaro
- Departamento de Neurociencia Cognitiva, División Neurociencias, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, México City, México
| | - León D Islas
- Departamento de Fisiología, Facultad de Medicina, Universidad Nacional Autónoma de México, México City, México
| | - Tamara Rosenbaum
- Departamento de Neurociencia Cognitiva, División Neurociencias, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, México City, México
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15
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Castillo K, Diaz-Franulic I, Canan J, Gonzalez-Nilo F, Latorre R. Thermally activated TRP channels: molecular sensors for temperature detection. Phys Biol 2018; 15:021001. [PMID: 29135465 DOI: 10.1088/1478-3975/aa9a6f] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Temperature sensing is one of the oldest capabilities of living organisms, and is essential for sustaining life, because failure to avoid extreme noxious temperatures can result in tissue damage or death. A subset of members of the transient receptor potential (TRP) ion channel family is finely tuned to detect temperatures ranging from extreme cold to noxious heat, giving rise to thermoTRP channels. Structural and functional experiments have shown that thermoTRP channels are allosteric proteins, containing different domains that sense changes in temperature, among other stimuli, triggering pore opening. Although temperature-dependence is well characterized in thermoTRP channels, the molecular nature of temperature-sensing elements remains unknown. Importantly, thermoTRP channels are involved in pain sensation, related to pathological conditions. Here, we provide an overview of thermoTRP channel activation. We also discuss the structural and functional evidence supporting the existence of an intrinsic temperature sensor in this class of channels, and we explore the basic thermodynamic principles for channel activation. Finally, we give a view of their role in painful pathophysiological conditions.
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Affiliation(s)
- Karen Castillo
- Facultad de Ciencias, Centro Interdisciplinario de Neurociencia de Valparaíso, Universidad de Valparaíso, Valparaíso 2366103, Chile. www.cinv.cl
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16
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Transient receptor potential melastatin-2 and temperature participate in the process of CD38-regulated oxytocin secretion. Neuroreport 2018; 27:935-9. [PMID: 27348016 DOI: 10.1097/wnr.0000000000000634] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
In recent studies, oxytocin showed potential for the treatment of mental diseases. CD38 is essential for oxytocin release, and hence plays a critical role in social behavior. CD38 catalyzes β-NAD into cyclic ADP ribose (cADPR), which could elevate the intracellular Ca by Ca-permeable channels for oxytocin secretion. The temperature-sensitive cation channel, transient receptor potential melastatin-2 (TRPM2), is a cation-nonselective cation and has been shown to affect oxytocin indirectly. The aim of the present study was to verify the participation of temperature and TRPM2 in CD38-regulated oxytocin release. The crude membranes were prepared to isolate the nerve terminals from the posterior pituitary. At 34°C, 37°C, and 39°C, agonists (β-NAD, ADPR, cADPR) and antagonists (8-Br-cADPR, 2-APB) were used to stimulate the nerve terminals. Oxytocin releases were investigated by enzyme-linked immunosorbent assay. In addition, the expression of TRPM2 and CD38 in the hypothalamus and pituitary was detected by western blotting and quantitative PCR. CD38 agonists (β-NAD, cADPR) and antagonist (8-Br-cADPR) could increase or reduce the oxytocin release, respectively. TRPM2 agonist (ADPR) and antagonist (2-APB) alone could also regulate oxytocin release. Furthermore, temperature could increase agonist stimulation and attenuate the antagonist inhibition on oxytocin release. In addition, CD38 and TRPM2 were expressed in the hypothalamus and pituitary at both the mRNA and the protein level. TRPM2 in pituitary nerve terminals plays a role in oxytocin release. Temperature- enhanced oxytocin release by CD38 and TRPM2. TRPM2 might be involved in the process of CD38-regulated oxytocin release.
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17
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Yin Y, Wu M, Zubcevic L, Borschel WF, Lander GC, Lee SY. Structure of the cold- and menthol-sensing ion channel TRPM8. Science 2017; 359:237-241. [PMID: 29217583 DOI: 10.1126/science.aan4325] [Citation(s) in RCA: 194] [Impact Index Per Article: 27.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Accepted: 11/27/2017] [Indexed: 12/12/2022]
Abstract
Transient receptor potential melastatin (TRPM) cation channels are polymodal sensors that are involved in a variety of physiological processes. Within the TRPM family, member 8 (TRPM8) is the primary cold and menthol sensor in humans. We determined the cryo-electron microscopy structure of the full-length TRPM8 from the collared flycatcher at an overall resolution of ~4.1 ångstroms. Our TRPM8 structure reveals a three-layered architecture. The amino-terminal domain with a fold distinct among known TRP structures, together with the carboxyl-terminal region, forms a large two-layered cytosolic ring that extensively interacts with the transmembrane channel layer. The structure suggests that the menthol-binding site is located within the voltage-sensor-like domain and thus provides a structural glimpse of the design principle of the molecular transducer for cold and menthol sensation.
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Affiliation(s)
- Ying Yin
- Department of Biochemistry, Duke University School of Medicine, Durham, NC 27710, USA
| | - Mengyu Wu
- Department of Integrative Structural and Computational Biology, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Lejla Zubcevic
- Department of Biochemistry, Duke University School of Medicine, Durham, NC 27710, USA
| | - William F Borschel
- Department of Biochemistry, Duke University School of Medicine, Durham, NC 27710, USA
| | - Gabriel C Lander
- Department of Integrative Structural and Computational Biology, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Seok-Yong Lee
- Department of Biochemistry, Duke University School of Medicine, Durham, NC 27710, USA
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18
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Seebacher F, Little AG. Plasticity of Performance Curves Can Buffer Reaction Rates from Body Temperature Variation in Active Endotherms. Front Physiol 2017; 8:575. [PMID: 28824463 PMCID: PMC5543086 DOI: 10.3389/fphys.2017.00575] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Accepted: 07/25/2017] [Indexed: 12/25/2022] Open
Abstract
Endotherms regulate their core body temperature by adjusting metabolic heat production and insulation. Endothermic body temperatures are therefore relatively stable compared to external temperatures. The thermal sensitivity of biochemical reaction rates is thought to have co-evolved with body temperature regulation so that optimal reaction rates occur at the regulated body temperature. However, recent data show that core body temperatures even of non-torpid endotherms fluctuate considerably. Additionally, peripheral temperatures can be considerably lower and more variable than core body temperatures. Here we discuss whether published data support the hypothesis that thermal performance curves of physiological reaction rates are plastic so that performance is maintained despite variable body temperatures within active (non-torpid) endotherms, and we explore mechanisms that confer plasticity. There is evidence that thermal performance curves in tissues that experience thermal fluctuations can be plastic, although this question remains relatively unexplored for endotherms. Mechanisms that alter thermal responses locally at the tissue level include transient potential receptor ion channels (TRPV and TRPM) and the AMP-activated protein kinase (AMPK) both of which can influence metabolism and energy expenditure. Additionally, the thermal sensitivity of processes that cause post-transcriptional RNA degradation can promote the relative expression of cold-responsive genes. Endotherms can respond to environmental fluctuations similarly to ectotherms, and thermal plasticity complements core body temperature regulation to increase whole-organism performance. Thermal plasticity is ancestral to endothermic thermoregulation, but it has not lost its selective advantage so that modern endotherms are a physiological composite of ancestral ectothermic and derived endothermic traits.
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Affiliation(s)
- Frank Seebacher
- School of Life and Environmental Sciences, University of SydneySydney, NSW, Australia
| | - Alexander G Little
- Rosenstiel School of Marine and Atmospheric Science, The University of MiamiMiami, FL, United States
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19
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Genova T, Grolez GP, Camillo C, Bernardini M, Bokhobza A, Richard E, Scianna M, Lemonnier L, Valdembri D, Munaron L, Philips MR, Mattot V, Serini G, Prevarskaya N, Gkika D, Pla AF. TRPM8 inhibits endothelial cell migration via a non-channel function by trapping the small GTPase Rap1. J Cell Biol 2017; 216:2107-2130. [PMID: 28550110 PMCID: PMC5496606 DOI: 10.1083/jcb.201506024] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2015] [Revised: 06/26/2016] [Accepted: 04/12/2017] [Indexed: 01/30/2023] Open
Abstract
Endothelial cell adhesion and migration are critical steps of the angiogenic process, whose dysfunction is associated with tumor growth and metastasis. The TRPM8 channel has recently been proposed to play a protective role in prostate cancer by impairing cell motility. However, the mechanisms by which it could influence vascular behavior are unknown. Here, we reveal a novel non-channel function for TRPM8 that unexpectedly acts as a Rap1 GTPase inhibitor, thereby inhibiting endothelial cell motility, independently of pore function. TRPM8 retains Rap1 intracellularly through direct protein-protein interaction, thus preventing its cytoplasm-plasma membrane trafficking. In turn, this mechanism impairs the activation of a major inside-out signaling pathway that triggers the conformational activation of integrin and, consequently, cell adhesion, migration, in vitro endothelial tube formation, and spheroid sprouting. Our results bring to light a novel, pore-independent molecular mechanism by which endogenous TRPM8 expression inhibits Rap1 GTPase and thus plays a critical role in the behavior of vascular endothelial cells by inhibiting migration.
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Affiliation(s)
- Tullio Genova
- Department of Life Sciences and Systems Biology, University of Torino, Torino, Italy.,Department of Surgical Sciences, C.I.R. Dental School, University of Torino, Torino, Italy
| | - Guillaume P Grolez
- Laboratoire de Physiologie cellulaire, Institut National de la Santé et de la Recherche Médicale U1003, Laboratory of Excellence, Ion Channels Science and Therapeutics, Université de Lille, Villeneuve d'Ascq, France
| | - Chiara Camillo
- Laboratory of Cell Adhesion Dynamics, Candiolo Cancer Institute, Fondazione del Piemonte per l'Oncologia, Istituto di Ricovero e Cura a Carattere Scientifico, Department of Oncology, University of Torino School of Medicine, Candiolo, Italy
| | - Michela Bernardini
- Department of Life Sciences and Systems Biology, University of Torino, Torino, Italy.,Laboratoire de Physiologie cellulaire, Institut National de la Santé et de la Recherche Médicale U1003, Laboratory of Excellence, Ion Channels Science and Therapeutics, Université de Lille, Villeneuve d'Ascq, France
| | - Alexandre Bokhobza
- Laboratoire de Physiologie cellulaire, Institut National de la Santé et de la Recherche Médicale U1003, Laboratory of Excellence, Ion Channels Science and Therapeutics, Université de Lille, Villeneuve d'Ascq, France
| | - Elodie Richard
- BICeL Campus Lille1, FR3688 FRABio, Université de Lille, Villeneuve d'Ascq, France
| | - Marco Scianna
- Department of Mathematical Sciences, Politecnico di Torino, Torino, Italy
| | - Loic Lemonnier
- Laboratoire de Physiologie cellulaire, Institut National de la Santé et de la Recherche Médicale U1003, Laboratory of Excellence, Ion Channels Science and Therapeutics, Université de Lille, Villeneuve d'Ascq, France
| | - Donatella Valdembri
- Laboratory of Cell Adhesion Dynamics, Candiolo Cancer Institute, Fondazione del Piemonte per l'Oncologia, Istituto di Ricovero e Cura a Carattere Scientifico, Department of Oncology, University of Torino School of Medicine, Candiolo, Italy
| | - Luca Munaron
- Department of Life Sciences and Systems Biology, University of Torino, Torino, Italy.,Nanostructured Interfaces and Surfaces Centre of Excellence, University of Torino, Torino, Italy
| | - Mark R Philips
- Cancer Institute of Biomolecular Medicine, New York University School of Medicine, New York, NY
| | - Virginie Mattot
- Centre National de la Recherche Scientifique, Institut Pasteur de Lille, UMR 8161 - Mechanisms of Tumorigenesis and Target Therapies, Universite de Lille, Lille, France
| | - Guido Serini
- Laboratory of Cell Adhesion Dynamics, Candiolo Cancer Institute, Fondazione del Piemonte per l'Oncologia, Istituto di Ricovero e Cura a Carattere Scientifico, Department of Oncology, University of Torino School of Medicine, Candiolo, Italy
| | - Natalia Prevarskaya
- Laboratoire de Physiologie cellulaire, Institut National de la Santé et de la Recherche Médicale U1003, Laboratory of Excellence, Ion Channels Science and Therapeutics, Université de Lille, Villeneuve d'Ascq, France
| | - Dimitra Gkika
- Laboratoire de Physiologie cellulaire, Institut National de la Santé et de la Recherche Médicale U1003, Laboratory of Excellence, Ion Channels Science and Therapeutics, Université de Lille, Villeneuve d'Ascq, France
| | - Alessandra Fiorio Pla
- Department of Life Sciences and Systems Biology, University of Torino, Torino, Italy .,Nanostructured Interfaces and Surfaces Centre of Excellence, University of Torino, Torino, Italy.,Laboratoire de Physiologie cellulaire, Institut National de la Santé et de la Recherche Médicale U1003, Laboratory of Excellence, Ion Channels Science and Therapeutics, Université de Lille, Villeneuve d'Ascq, France
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20
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Romero-Romero S, Gomez Lagunas F, Balleza D. Side chain flexibility and coupling between the S4-S5 linker and the TRP domain in thermo-sensitive TRP channels: Insights from protein modeling. Proteins 2017; 85:630-646. [PMID: 28066924 DOI: 10.1002/prot.25243] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Revised: 12/01/2016] [Accepted: 01/03/2017] [Indexed: 11/11/2022]
Abstract
The transient receptor potential (TRP) superfamily is subdivided into several subfamilies on the basis of sequence similarity, which is highly heterogeneous but shows a molecular architecture that resembles the one present in members of the Kv channel superfamily. Because of this diversity, they produce a large variety of channels with different gating and permeability properties. Elucidation of these particular features necessarily requires comparative studies based on structural and functional data. The present study aims to compilate, analyze, and determine, in a coherent way, the relationship between intrinsic side-chain flexibility and the allosteric coupling in members of the TRPV, TRPM, and TRPC families. Based on the recently determined structures of TRPV1 and TRPV2, we have generated protein models for single subunits of TRPV5, TRPM8, and TRPC5 channels. With these models, we focused our attention on the apparently crucial role of the GP dipeptide at the center of the S4-S5 linker and discussed its role in the interaction with the TRP domain, specifically with the highly-conserved Trp during this coupling. Our analysis suggests an important role of the S4-S5L flexibility in the thermosensitivity, where heat-activated channels possess rigid S4-S5 linkers, whereas cold-activated channels have flexible ones. Finally, we also present evidence of the key interaction between the conserved Trp residue of the TRP box and of several residues in the S4-S5L, importantly the central Pro. Proteins 2017; 85:630-646. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Sergio Romero-Romero
- Facultad de Medicina, Departamento de Bioquímica, Universidad Nacional Autónoma de México, Mexico city, MEXICO
| | - Froylan Gomez Lagunas
- Facultad de Medicina, Departamento de Fisiología, Universidad Nacional Autónoma de México, Mexico city, MEXICO
| | - Daniel Balleza
- Facultad de Medicina, Departamento de Fisiología, Universidad Nacional Autónoma de México, Mexico city, MEXICO
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21
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Survery S, Moparthi L, Kjellbom P, Högestätt ED, Zygmunt PM, Johanson U. The N-terminal Ankyrin Repeat Domain Is Not Required for Electrophile and Heat Activation of the Purified Mosquito TRPA1 Receptor. J Biol Chem 2016; 291:26899-26912. [PMID: 27875296 DOI: 10.1074/jbc.m116.743443] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Revised: 11/01/2016] [Indexed: 12/29/2022] Open
Abstract
Temperature sensors are crucial for animals to optimize living conditions. The temperature response of the ion channel transient receptor potential A1 (TRPA1) is intriguing; some orthologs have been reported to be activated by cold and others by heat, but the molecular mechanisms responsible for its activation remain elusive. Single-channel electrophysiological recordings of heterologously expressed and purified Anopheles gambiae TRPA1 (AgTRPA1), with and without the N-terminal ankyrin repeat domain, demonstrate that both proteins are functional because they responded to the electrophilic compounds allyl isothiocyanate and cinnamaldehyde as well as heat. The proteins' similar intrinsic fluorescence properties and corresponding quenching when activated by allyl isothiocyanate or heat suggest lipid bilayer-independent conformational changes outside the N-terminal domain. The results show that AgTRPA1 is an inherent thermo- and chemoreceptor, and analogous to what has been reported for the human TRPA1 ortholog, the N-terminal domain may tune the response but is not required for the activation by these stimuli.
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Affiliation(s)
- Sabeen Survery
- From the Department of Biochemistry and Structural Biology, Center for Molecular Protein Science, Lund University, SE-221 00 Lund, Sweden and
| | - Lavanya Moparthi
- From the Department of Biochemistry and Structural Biology, Center for Molecular Protein Science, Lund University, SE-221 00 Lund, Sweden and
| | - Per Kjellbom
- From the Department of Biochemistry and Structural Biology, Center for Molecular Protein Science, Lund University, SE-221 00 Lund, Sweden and
| | - Edward D Högestätt
- the Clinical Chemistry and Pharmacology, Department of Laboratory Medicine, Lund University, SE-221 85 Lund, Sweden
| | - Peter M Zygmunt
- the Clinical Chemistry and Pharmacology, Department of Laboratory Medicine, Lund University, SE-221 85 Lund, Sweden
| | - Urban Johanson
- From the Department of Biochemistry and Structural Biology, Center for Molecular Protein Science, Lund University, SE-221 00 Lund, Sweden and
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22
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Wen H, Qin F, Zheng W. Toward elucidating the heat activation mechanism of the TRPV1 channel gating by molecular dynamics simulation. Proteins 2016; 84:1938-1949. [PMID: 27699868 DOI: 10.1002/prot.25177] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Revised: 09/03/2016] [Accepted: 09/24/2016] [Indexed: 01/01/2023]
Abstract
As a key cellular sensor, the TRPV1 cation channel undergoes a gating transition from a closed state to an open state in response to various physical and chemical stimuli including noxious heat. Despite years of study, the heat activation mechanism of TRPV1 gating remains enigmatic at the molecular level. Toward elucidating the structural and energetic basis of TRPV1 gating, we have performed molecular dynamics (MD) simulations (with cumulative simulation time of 3 μs), starting from the high-resolution closed and open structures of TRPV1 solved by cryo-electron microscopy. In the closed-state simulations at 30°C, we observed a stably closed channel constricted at the lower gate (near residue I679), while the upper gate (near residues G643 and M644) is dynamic and undergoes flickery opening/closing. In the open-state simulations at 60°C, we found higher conformational variation consistent with a large entropy increase required for the heat activation, and both the lower and upper gates are dynamic with transient opening/closing. Through ensemble-based structural analyses of the closed state versus the open state, we revealed pronounced closed-to-open conformational changes involving the membrane proximal domain (MPD) linker, the outer pore, and the TRP helix, which are accompanied by breaking/forming of a network of closed/open-state specific hydrogen bonds. By comparing the closed-state simulations at 30°C and 60°C, we observed heat-activated conformational changes in the MPD linker, the outer pore, and the TRP helix that resemble the closed-to-open conformational changes, along with partial formation of the open-state specific hydrogen bonds. Some of the residues involved in the above key hydrogen bonds were validated by previous mutational studies. Taken together, our MD simulations have offered rich structural and dynamic details beyond the static structures of TRPV1, and promising targets for future mutagenesis and functional studies of the TRPV1 channel. Proteins 2016; 84:1938-1949. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Han Wen
- Department of Physics, State University of New York at Buffalo, Buffalo, New York, 14260
| | - Feng Qin
- Department of Physiology and Biophysical Sciences, State University of New York at Buffalo, Buffalo, New York, 14260
| | - Wenjun Zheng
- Department of Physics, State University of New York at Buffalo, Buffalo, New York, 14260
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23
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Bidaux G, Sgobba M, Lemonnier L, Borowiec AS, Noyer L, Jovanovic S, Zholos AV, Haider S. Functional and Modeling Studies of the Transmembrane Region of the TRPM8 Channel. Biophys J 2016; 109:1840-51. [PMID: 26536261 DOI: 10.1016/j.bpj.2015.09.027] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2015] [Revised: 09/18/2015] [Accepted: 09/28/2015] [Indexed: 12/15/2022] Open
Abstract
Members of the transient receptor potential (TRP) ion channel family act as polymodal cellular sensors, which aid in regulating Ca(2+) homeostasis. Within the TRP family, TRPM8 is the cold receptor that forms a nonselective homotetrameric cation channel. In the absence of TRPM8 crystal structure, little is known about the relationship between structure and function. Inferences of TRPM8 structure have come from mutagenesis experiments coupled to electrophysiology, mainly regarding the fourth transmembrane helix (S4), which constitutes a moderate voltage-sensing domain, and about cold sensor and phosphatidylinositol 4,5-bisphosphate binding sites, which are both located in the C-terminus of TRPM8. In this study, we use a combination of molecular modeling and experimental techniques to examine the structure of the TRPM8 transmembrane and pore helix region including the conducting conformation of the selectivity filter. The model is consistent with a large amount of functional data and was further tested by mutagenesis. We present structural insight into the role of residues involved in intra- and intersubunit interactions and their link with the channel activity, sensitivity to icilin, menthol and cold, and impact on channel oligomerization.
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Affiliation(s)
- Gabriel Bidaux
- Inserm, U1003, Laboratoire de Physiologie Cellulaire, Equipe labellisée par la Ligue contre le Cancer, Villeneuve d'Ascq, France; Laboratory of Excellence, Ion Channels Science and Therapeutics, Université de Lille 1, Villeneuve d'Ascq, France; Laboratoire Biophotonique Cellulaire Fonctionnelle. Institut de Recherche Interdisciplinaire, Villeneuve d'Ascq, France
| | - Miriam Sgobba
- Centre for Cancer Research and Cell Biology, Queen's University of Belfast, Belfast, United Kingdom
| | - Loic Lemonnier
- Inserm, U1003, Laboratoire de Physiologie Cellulaire, Equipe labellisée par la Ligue contre le Cancer, Villeneuve d'Ascq, France; Laboratory of Excellence, Ion Channels Science and Therapeutics, Université de Lille 1, Villeneuve d'Ascq, France
| | - Anne-Sophie Borowiec
- Inserm, U1003, Laboratoire de Physiologie Cellulaire, Equipe labellisée par la Ligue contre le Cancer, Villeneuve d'Ascq, France; Laboratory of Excellence, Ion Channels Science and Therapeutics, Université de Lille 1, Villeneuve d'Ascq, France
| | - Lucile Noyer
- Inserm, U1003, Laboratoire de Physiologie Cellulaire, Equipe labellisée par la Ligue contre le Cancer, Villeneuve d'Ascq, France; Laboratory of Excellence, Ion Channels Science and Therapeutics, Université de Lille 1, Villeneuve d'Ascq, France
| | | | - Alexander V Zholos
- Department of Biophysics, Educational and Scientific Centre, "Institute of Biology" Taras Shevchenko, Kiev National University, Kiev, Ukraine.
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Zhong J, Amina S, Liang M, Akther S, Yuhi T, Nishimura T, Tsuji C, Tsuji T, Liu HX, Hashii M, Furuhara K, Yokoyama S, Yamamoto Y, Okamoto H, Zhao YJ, Lee HC, Tominaga M, Lopatina O, Higashida H. Cyclic ADP-Ribose and Heat Regulate Oxytocin Release via CD38 and TRPM2 in the Hypothalamus during Social or Psychological Stress in Mice. Front Neurosci 2016; 10:304. [PMID: 27499729 PMCID: PMC4956647 DOI: 10.3389/fnins.2016.00304] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Accepted: 06/16/2016] [Indexed: 12/20/2022] Open
Abstract
Hypothalamic oxytocin (OT) is released into the brain by cyclic ADP-ribose (cADPR) with or without depolarizing stimulation. Previously, we showed that the intracellular free calcium concentration ([Ca2+]i) that seems to trigger OT release can be elevated by β-NAD+, cADPR, and ADP in mouse oxytocinergic neurons. As these β-NAD+ metabolites activate warm-sensitive TRPM2 cation channels, when the incubation temperature is increased, the [Ca2+]i in hypothalamic neurons is elevated. However, it has not been determined whether OT release is facilitated by heat in vitro or hyperthermia in vivo in combination with cADPR. Furthermore, it has not been examined whether CD38 and TRPM2 exert their functions on OT release during stress or stress-induced hyperthermia in relation to the anxiolytic roles and social behaviors of OT under stress conditions. Here, we report that OT release from the isolated hypothalami of male mice in culture was enhanced by extracellular application of cADPR or increasing the incubation temperature from 35°C to 38.5°C, and simultaneous stimulation showed a greater effect. This release was inhibited by a cADPR-dependent ryanodine receptor inhibitor and a nonspecific TRPM2 inhibitor. The facilitated release by heat and cADPR was suppressed in the hypothalamus isolated from CD38 knockout mice and CD38- or TRPM2-knockdown mice. In the course of these experiments, we noted that OT release differed markedly between individual mice under stress with group housing. That is, when male mice received cage-switch stress and eliminated due to their social subclass, significantly higher levels of OT release were found in subordinates compared with ordinates. In mice exposed to anxiety stress in an open field, the cerebrospinal fluid (CSF) OT level increased transiently at 5 min after exposure, and the rectal temperature also increased from 36.6°C to 37.8°C. OT levels in the CSF of mice with lipopolysaccharide-induced fever (+0.8°C) were higher than those of control mice. The TRPM2 mRNA levels and immunoreactivities increased in the subordinate group with cage-switch stress. These results showed that cADPR/CD38 and heat/TRPM2 are co-regulators of OT secretion and suggested that CD38 and TRPM2 are potential therapeutic targets for OT release in psychiatric diseases caused by social stress.
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Affiliation(s)
- Jing Zhong
- Department of Basic Research on Social Recognition and Memory, Research Centre for Child Mental Development, Kanazawa University Kanazawa, Japan
| | - Sarwat Amina
- Department of Basic Research on Social Recognition and Memory, Research Centre for Child Mental Development, Kanazawa University Kanazawa, Japan
| | - Mingkun Liang
- Department of Basic Research on Social Recognition and Memory, Research Centre for Child Mental Development, Kanazawa University Kanazawa, Japan
| | - Shirin Akther
- Department of Basic Research on Social Recognition and Memory, Research Centre for Child Mental Development, Kanazawa University Kanazawa, Japan
| | - Teruko Yuhi
- Department of Basic Research on Social Recognition and Memory, Research Centre for Child Mental Development, Kanazawa University Kanazawa, Japan
| | - Tomoko Nishimura
- Department of Basic Research on Social Recognition and Memory, Research Centre for Child Mental Development, Kanazawa University Kanazawa, Japan
| | - Chiharu Tsuji
- Department of Basic Research on Social Recognition and Memory, Research Centre for Child Mental Development, Kanazawa University Kanazawa, Japan
| | - Takahiro Tsuji
- Department of Basic Research on Social Recognition and Memory, Research Centre for Child Mental Development, Kanazawa University Kanazawa, Japan
| | - Hong-Xiang Liu
- Department of Basic Research on Social Recognition and Memory, Research Centre for Child Mental Development, Kanazawa University Kanazawa, Japan
| | - Minako Hashii
- Department of Basic Research on Social Recognition and Memory, Research Centre for Child Mental Development, Kanazawa University Kanazawa, Japan
| | - Kazumi Furuhara
- Department of Basic Research on Social Recognition and Memory, Research Centre for Child Mental Development, Kanazawa University Kanazawa, Japan
| | - Shigeru Yokoyama
- Department of Basic Research on Social Recognition and Memory, Research Centre for Child Mental Development, Kanazawa University Kanazawa, Japan
| | - Yasuhiko Yamamoto
- Department of Biochemistry and Molecular Vascular Biology, Kanazawa University Graduate School of Medical Sciences Kanazawa, Japan
| | - Hiroshi Okamoto
- Department of Biochemistry and Molecular Vascular Biology, Kanazawa University Graduate School of Medical SciencesKanazawa, Japan; Department of Biochemistry, Tohoku University Graduate School of MedicineSendai, Japan
| | - Yong Juan Zhao
- School of Chemical Biology and Biotechnology, Peking University Graduate School Shenzhen, China
| | - Hon Cheung Lee
- School of Chemical Biology and Biotechnology, Peking University Graduate School Shenzhen, China
| | - Makoto Tominaga
- Division of Cell Signaling, Okazaki Institute for Integrative Bioscience (National Institute for Physiological Sciences), National Institutes of Natural Sciences Okazaki, Japan
| | - Olga Lopatina
- Department of Basic Research on Social Recognition and Memory, Research Centre for Child Mental Development, Kanazawa UniversityKanazawa, Japan; Research Institute of Molecular Medicine and Pathobiochemistry, Krasnoyarsk State Medical UniversityKrasnoyarsk, Russia
| | - Haruhiro Higashida
- Department of Basic Research on Social Recognition and Memory, Research Centre for Child Mental Development, Kanazawa UniversityKanazawa, Japan; Research Institute of Molecular Medicine and Pathobiochemistry, Krasnoyarsk State Medical UniversityKrasnoyarsk, Russia
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Diaz-Franulic I, Poblete H, Miño-Galaz G, González C, Latorre R. Allosterism and Structure in Thermally Activated Transient Receptor Potential Channels. Annu Rev Biophys 2016; 45:371-98. [DOI: 10.1146/annurev-biophys-062215-011034] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Ignacio Diaz-Franulic
- Center for Bioinformatics and Integrative Biology, Facultad de Ciencias Biológicas, Universidad Andres Bello, Santiago 8370146, Chile
- Centro Interdisciplinario de Neurociencia de Valparaíso, Facultad de Ciencias, Universidad de Valparaíso, Valparaíso 2366103, Chile; ,
- Fraunhofer Chile Research, Las Condes 7550296, Santiago, Chile
| | - Horacio Poblete
- Institute of Computational Comparative Medicine, Nanotechnology Innovation Center of Kansas State, Department of Anatomy and Physiology, Kansas State University, Manhattan, Kansas 66506-5802
| | - Germán Miño-Galaz
- Center for Bioinformatics and Integrative Biology, Facultad de Ciencias Biológicas, Universidad Andres Bello, Santiago 8370146, Chile
- Centro Interdisciplinario de Neurociencia de Valparaíso, Facultad de Ciencias, Universidad de Valparaíso, Valparaíso 2366103, Chile; ,
| | - Carlos González
- Centro Interdisciplinario de Neurociencia de Valparaíso, Facultad de Ciencias, Universidad de Valparaíso, Valparaíso 2366103, Chile; ,
| | - Ramón Latorre
- Centro Interdisciplinario de Neurociencia de Valparaíso, Facultad de Ciencias, Universidad de Valparaíso, Valparaíso 2366103, Chile; ,
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26
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Human TRPA1 is a heat sensor displaying intrinsic U-shaped thermosensitivity. Sci Rep 2016; 6:28763. [PMID: 27349477 PMCID: PMC4923899 DOI: 10.1038/srep28763] [Citation(s) in RCA: 92] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2016] [Accepted: 06/07/2016] [Indexed: 12/20/2022] Open
Abstract
Thermosensitive Transient Receptor Potential (TRP) channels are believed to respond to either cold or heat. In the case of TRP subtype A1 (TRPA1), there seems to be a species-dependent divergence in temperature sensation as non-mammalian TRPA1 is heat-sensitive whereas mammalian TRPA1 is sensitive to cold. It has been speculated but never experimentally proven that TRPA1 and other temperature-sensitive ion channels have the inherent capability of responding to both cold and heat. Here we show that redox modification and ligands affect human TRPA1 (hTRPA1) cold and heat sensing properties in lipid bilayer and whole-cell patch-clamp recordings as well as heat-evoked TRPA1-dependent calcitonin gene-related peptide (CGRP) release from mouse trachea. Studies of purified hTRPA1 intrinsic tryptophan fluorescence, in the absence of lipid bilayer, consolidate hTRPA1 as an intrinsic bidirectional thermosensor that is modified by the redox state and ligands. Thus, the heat sensing property of TRPA1 is conserved in mammalians, in which TRPA1 may contribute to sensing warmth and uncomfortable heat in addition to noxious cold.
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Hedrich R, Salvador-Recatalà V, Dreyer I. Electrical Wiring and Long-Distance Plant Communication. TRENDS IN PLANT SCIENCE 2016; 21:376-387. [PMID: 26880317 DOI: 10.1016/j.tplants.2016.01.016] [Citation(s) in RCA: 122] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Revised: 01/06/2016] [Accepted: 01/18/2016] [Indexed: 05/18/2023]
Abstract
Electrical signalling over long distances is an efficient way of achieving cell-to-cell communication in living organisms. In plants, the phloem can be considered as a 'green cable' that allows the transmission of action potentials (APs) induced by stimuli such as wounding and cold. Measuring phloem potential changes and separating them from secondary responses of surrounding tissues can be achieved using living aphids as bioelectrodes. Two glutamate receptor-like genes (GLR3.3 and 3.6) were identified as being involved in the propagation of electrical activity from the damaged to undamaged leaves. However, phloem APs are initiated and propagated independently of these glutamate receptors. Here, we propose new screening approaches to obtain further information on the components required for electrical signalling in phloem cables.
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Affiliation(s)
- Rainer Hedrich
- Institute for Molecular Plant Physiology and Biophysics, University of Würzburg, Julius-von-Sachs-Platz 2, 97082 Würzburg, Germany.
| | - Vicenta Salvador-Recatalà
- Institute for Molecular Plant Physiology and Biophysics, University of Würzburg, Julius-von-Sachs-Platz 2, 97082 Würzburg, Germany
| | - Ingo Dreyer
- Centro de Bioinformática y Simulación Molecular (CBSM), Universidad de Talca, 2 Norte 685, Talca, Chile.
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28
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Nisembaum LG, Besseau L, Paulin CH, Charpantier A, Martin P, Magnanou E, Fuentès M, Delgado MJ, Falcón J. In the Heat of the Night: Thermo-TRPV Channels in the Salmonid Pineal Photoreceptors and Modulation of Melatonin Secretion. Endocrinology 2015; 156:4629-38. [PMID: 26389691 DOI: 10.1210/en.2015-1684] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Photoperiod plays an essential role in the synchronization of metabolism, physiology, and behavior to the cyclic variations of the environment. In vertebrates, information is relayed by the pineal cells and translated into the nocturnal production of melatonin. The duration of this signal corresponds to the duration of the night. In fish, the pinealocytes are true photoreceptors in which the amplitude of the nocturnal surge is modulated by temperature in a species-dependent manner. Thus, the daily and annual variations in the amplitude and duration of the nocturnal melatonin signal provide information on daily and calendar time. Both light and temperature act on the activity of the penultimate enzyme in the melatonin biosynthesis pathway, the arylalkylamine N-acetyltransferase (serotonin → N-acetylserotonin). Although the mechanisms of the light/dark regulation of melatonin secretion are quite well understood, those of temperature remain unelucidated. More generally, the mechanisms of thermoreception are unknown in ectotherms. Here we provide the first evidence that two thermotransient receptor potential (TRP) channels, TRPV1 and TRPV4, are expressed in the pineal photoreceptor cells of a teleost fish, in which they modulate melatonin secretion in vitro. The effects are temperature dependent, at least for TRPV1. Our data support the idea that the pineal of fish is involved in thermoregulation and that the pineal photoreceptors are also thermoreceptors. In other nervous and nonnervous tissues, TRPV1 and TRPV4 display a ubiquitous but quantitatively variable distribution. These results are a fundamental step in the elucidation of the mechanisms of temperature transduction in fish.
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Affiliation(s)
- Laura Gabriela Nisembaum
- Sorbonne Universités, Université Pierre et Marie Curie, Paris 06 (L.B., C.-H.P., A.C.), Centre National de la Recherche Scientifique (L.G.N., E.M., M.F., J.F.), Biologie Intégrative des Organismes Marins (BIOM), Observatoire Océanologique, F-66650 Banyuls sur Mer, France; Conservatoire National du Saumon Sauvage (P.M.), F-43300 Chanteuges, France; and Universidad Complutense de Madrid (L.G.N., M.J.D.) E-28040 Madrid, Spain
| | - Laurence Besseau
- Sorbonne Universités, Université Pierre et Marie Curie, Paris 06 (L.B., C.-H.P., A.C.), Centre National de la Recherche Scientifique (L.G.N., E.M., M.F., J.F.), Biologie Intégrative des Organismes Marins (BIOM), Observatoire Océanologique, F-66650 Banyuls sur Mer, France; Conservatoire National du Saumon Sauvage (P.M.), F-43300 Chanteuges, France; and Universidad Complutense de Madrid (L.G.N., M.J.D.) E-28040 Madrid, Spain
| | - Charles-Hubert Paulin
- Sorbonne Universités, Université Pierre et Marie Curie, Paris 06 (L.B., C.-H.P., A.C.), Centre National de la Recherche Scientifique (L.G.N., E.M., M.F., J.F.), Biologie Intégrative des Organismes Marins (BIOM), Observatoire Océanologique, F-66650 Banyuls sur Mer, France; Conservatoire National du Saumon Sauvage (P.M.), F-43300 Chanteuges, France; and Universidad Complutense de Madrid (L.G.N., M.J.D.) E-28040 Madrid, Spain
| | - Alice Charpantier
- Sorbonne Universités, Université Pierre et Marie Curie, Paris 06 (L.B., C.-H.P., A.C.), Centre National de la Recherche Scientifique (L.G.N., E.M., M.F., J.F.), Biologie Intégrative des Organismes Marins (BIOM), Observatoire Océanologique, F-66650 Banyuls sur Mer, France; Conservatoire National du Saumon Sauvage (P.M.), F-43300 Chanteuges, France; and Universidad Complutense de Madrid (L.G.N., M.J.D.) E-28040 Madrid, Spain
| | - Patrick Martin
- Sorbonne Universités, Université Pierre et Marie Curie, Paris 06 (L.B., C.-H.P., A.C.), Centre National de la Recherche Scientifique (L.G.N., E.M., M.F., J.F.), Biologie Intégrative des Organismes Marins (BIOM), Observatoire Océanologique, F-66650 Banyuls sur Mer, France; Conservatoire National du Saumon Sauvage (P.M.), F-43300 Chanteuges, France; and Universidad Complutense de Madrid (L.G.N., M.J.D.) E-28040 Madrid, Spain
| | - Elodie Magnanou
- Sorbonne Universités, Université Pierre et Marie Curie, Paris 06 (L.B., C.-H.P., A.C.), Centre National de la Recherche Scientifique (L.G.N., E.M., M.F., J.F.), Biologie Intégrative des Organismes Marins (BIOM), Observatoire Océanologique, F-66650 Banyuls sur Mer, France; Conservatoire National du Saumon Sauvage (P.M.), F-43300 Chanteuges, France; and Universidad Complutense de Madrid (L.G.N., M.J.D.) E-28040 Madrid, Spain
| | - Michael Fuentès
- Sorbonne Universités, Université Pierre et Marie Curie, Paris 06 (L.B., C.-H.P., A.C.), Centre National de la Recherche Scientifique (L.G.N., E.M., M.F., J.F.), Biologie Intégrative des Organismes Marins (BIOM), Observatoire Océanologique, F-66650 Banyuls sur Mer, France; Conservatoire National du Saumon Sauvage (P.M.), F-43300 Chanteuges, France; and Universidad Complutense de Madrid (L.G.N., M.J.D.) E-28040 Madrid, Spain
| | - Maria-Jesus Delgado
- Sorbonne Universités, Université Pierre et Marie Curie, Paris 06 (L.B., C.-H.P., A.C.), Centre National de la Recherche Scientifique (L.G.N., E.M., M.F., J.F.), Biologie Intégrative des Organismes Marins (BIOM), Observatoire Océanologique, F-66650 Banyuls sur Mer, France; Conservatoire National du Saumon Sauvage (P.M.), F-43300 Chanteuges, France; and Universidad Complutense de Madrid (L.G.N., M.J.D.) E-28040 Madrid, Spain
| | - Jack Falcón
- Sorbonne Universités, Université Pierre et Marie Curie, Paris 06 (L.B., C.-H.P., A.C.), Centre National de la Recherche Scientifique (L.G.N., E.M., M.F., J.F.), Biologie Intégrative des Organismes Marins (BIOM), Observatoire Océanologique, F-66650 Banyuls sur Mer, France; Conservatoire National du Saumon Sauvage (P.M.), F-43300 Chanteuges, France; and Universidad Complutense de Madrid (L.G.N., M.J.D.) E-28040 Madrid, Spain
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29
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Moehring F, O'Hara CL, Stucky CL. Bedding Material Affects Mechanical Thresholds, Heat Thresholds, and Texture Preference. THE JOURNAL OF PAIN 2015; 17:50-64. [PMID: 26456764 DOI: 10.1016/j.jpain.2015.08.014] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Revised: 08/31/2015] [Accepted: 08/31/2015] [Indexed: 01/07/2023]
Abstract
UNLABELLED It has long been known that the bedding type on which animals are housed can affect breeding behavior and cage environment, yet little is known about its effects on evoked behavior responses or nonreflexive behaviors. C57BL/6 mice were housed for 2 weeks on 1 of 5 bedding types: aspen Sani-Chips (standard bedding for our institute), ALPHA-Dri, Cellu-Dri, Pure-o'Cel, or TEK-Fresh. Mice housed on aspen exhibited the lowest (most sensitive) mechanical thresholds and those on TEK-Fresh exhibited 3-fold higher thresholds. Although bedding type had no effect on responses to punctate or dynamic light touch stimuli, TEK-Fresh-housed animals exhibited greater responsiveness in a noxious needle assay than did those housed on the other bedding types. Heat sensitivity was also affected by bedding because animals housed on aspen exhibited the shortest (most sensitive) latencies to withdrawal, whereas those housed on TEK-Fresh had the longest (least sensitive) latencies to response. Slight differences between bedding types were also seen in a moderate cold temperature preference assay. A modified tactile conditioned place preference chamber assay revealed that animals preferred TEK-Fresh to aspen bedding. Bedding type had no effect in a nonreflexive wheel running assay. In both acute (2 day) and chronic (5 week) inflammation induced by injection of complete Freund's adjuvant in the hindpaw, mechanical thresholds were reduced in all groups regardless of bedding type, but TEK-Fresh and Pure-o'Cel groups exhibited a greater dynamic range between controls and inflamed cohorts than aspen-housed mice. PERSPECTIVE These findings indicate that the bedding type routinely used to house animals can markedly affect the dynamic range of mechanical and heat behavior assays under normal and tissue injury conditions. Among beddings tested, TEK-Fresh bedding resulted in the least sensitive baseline thresholds for mechanical and thermal stimuli and the greatest dynamic range after tissue injury. Therefore, selection of routine cage bedding material should be carefully considered for animals that will be tested in behavioral somatosensory assays.
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Affiliation(s)
- Francie Moehring
- Department of Cell Biology, Neurobiology, and Anatomy, Medical College of Wisconsin, Milwaukee, WI
| | - Crystal L O'Hara
- Department of Cell Biology, Neurobiology, and Anatomy, Medical College of Wisconsin, Milwaukee, WI
| | - Cheryl L Stucky
- Department of Cell Biology, Neurobiology, and Anatomy, Medical College of Wisconsin, Milwaukee, WI.
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30
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Carrasquel-Ursulaez W, Moldenhauer H, Castillo JP, Latorre R, Alvarez O. Biophysical analysis of thermosensitive TRP channels with a special focus on the cold receptor TRPM8. Temperature (Austin) 2015; 2:188-200. [PMID: 27227023 PMCID: PMC4843903 DOI: 10.1080/23328940.2015.1047558] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2015] [Revised: 04/28/2015] [Accepted: 04/29/2015] [Indexed: 11/03/2022] Open
Abstract
Mammals maintain homeostatic control of their body temperature. Therefore, these organisms are expected to have adaptations that confer the ability to detect and react to both self and ambient temperature. Temperature-activated ion channels have been discovered to be the primary molecular determinants of thermosensation. The most representative group of these determinants constitutes members of the transient receptor potential superfamily, TRP, which are activated by either low or high temperatures covering the whole range of physiologically relevant temperatures. This review makes a critical assessment of existing analytical methods of temperature-activated TRP channel mechanisms using the cold-activated TRPM8 channel as a paradigm.
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Key Words
- DRG, dorsal root ganglion
- F, Faraday
- G0, Standard molar Gibbs free energy
- H0, Standard molar enthalpy
- Q10, temperature coefficient
- R, universal gas constant
- S0, Standard molar entropy
- T, temperature
- TG, trigeminal ganglion
- TRP, transient receptor potential
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Affiliation(s)
- Willy Carrasquel-Ursulaez
- Centro Interdisciplinario de Neurociencia de Valparaíso; Universidad de Valparaíso; Valparaíso, Chile; Doctorado en Ciencias Mención Neurociencias; Facultad de Ciencias; Universidad de Valparaíso; Valparaíso, Chile
| | - Hans Moldenhauer
- Centro Interdisciplinario de Neurociencia de Valparaíso; Universidad de Valparaíso ; Valparaíso, Chile
| | - Juan Pablo Castillo
- Centro Interdisciplinario de Neurociencia de Valparaíso; Universidad de Valparaíso ; Valparaíso, Chile
| | - Ramón Latorre
- Centro Interdisciplinario de Neurociencia de Valparaíso; Universidad de Valparaíso ; Valparaíso, Chile
| | - Osvaldo Alvarez
- Centro Interdisciplinario de Neurociencia de Valparaíso; Universidad de Valparaíso; Valparaíso, Chile; Departamento de Biología; Facultad de Ciencias; Universidad de Chile; Santiago, Chile
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