1
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Picó-Munyoz R, Tárrega A, Laguna L. Origins of thirstiness sensation and current food solutions. Compr Rev Food Sci Food Saf 2023; 22:4433-4450. [PMID: 37583300 DOI: 10.1111/1541-4337.13229] [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: 12/13/2022] [Revised: 06/15/2023] [Accepted: 08/01/2023] [Indexed: 08/17/2023]
Abstract
The sensation of thirstiness is the desire to drink water. In certain situations, the ingestion of liquid water can be restricted. As a result, thirstiness is not relieved, resulting in an uncomfortable and distressing situation. The present review describes thirstiness and hydration, the food products and beverages that cause thirstiness, and the beverages and food products currently available to quench thirstiness in individuals with restricted access to liquid ingestion. It also discusses how to measure the effectiveness of calming thirstiness. To diminish thirstiness distress, different alternatives to liquids are proposed. Individuals with swallowing disorders are given thickened water, individuals with restricted water ingestion are given ice cubes or ice popsicles of different flavors, and sportspeople are given energy gels. However, current beverage solutions seem not to relieve thirst fully, although some stimuli like iced water, flavors (especially lemon and mint), or acids seem to work better than plain stimuli and could be added to existing products. Therefore, there is still a need to incorporate these strategies into beverage and food formulations and to test their effectiveness.
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Affiliation(s)
- Ruth Picó-Munyoz
- Consumer Perception and Behavior and Adapted Nutrition Laboratory, Institute of Agrochemistry and Food Technology (IATA, CSIC), Paterna, Spain
| | - Amparo Tárrega
- Consumer Perception and Behavior and Adapted Nutrition Laboratory, Institute of Agrochemistry and Food Technology (IATA, CSIC), Paterna, Spain
| | - Laura Laguna
- Consumer Perception and Behavior and Adapted Nutrition Laboratory, Institute of Agrochemistry and Food Technology (IATA, CSIC), Paterna, Spain
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2
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Lezama-García K, Mota-Rojas D, Martínez-Burnes J, Villanueva-García D, Domínguez-Oliva A, Gómez-Prado J, Mora-Medina P, Casas-Alvarado A, Olmos-Hernández A, Soto P, Muns R. Strategies for Hypothermia Compensation in Altricial and Precocial Newborn Mammals and Their Monitoring by Infrared Thermography. Vet Sci 2022; 9:vetsci9050246. [PMID: 35622774 PMCID: PMC9145389 DOI: 10.3390/vetsci9050246] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2022] [Revised: 05/18/2022] [Accepted: 05/18/2022] [Indexed: 02/06/2023] Open
Abstract
Thermoregulation in newborn mammals is an essential species-specific mechanism of the nervous system that contributes to their survival during the first hours and days of their life. When exposed to cold weather, which is a risk factor associated with mortality in neonates, pathways such as the hypothalamic–pituitary–adrenal axis (HPA) are activated to achieve temperature control, increasing the circulating levels of catecholamine and cortisol. Consequently, alterations in blood circulation and mechanisms to produce or to retain heat (e.g., vasoconstriction, piloerection, shivering, brown adipocyte tissue activation, and huddling) begin to prevent hypothermia. This study aimed to discuss the mechanisms of thermoregulation in newborn domestic mammals, highlighting the differences between altricial and precocial species. The processes that employ brown adipocyte tissue, shivering, thermoregulatory behaviors, and dermal vasomotor control will be analyzed to understand the physiology and the importance of implementing techniques to promote thermoregulation and survival in the critical post-birth period of mammals. Also, infrared thermography as a helpful method to perform thermal measurements without animal interactions does not affect these parameters.
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Affiliation(s)
- Karina Lezama-García
- PhD Program in Biological and Health Sciences [Doctorado en Ciencias Biológicas y de la Salud], Universidad Autónoma Metropolitana (UAM), Mexico City 04960, Mexico;
| | - Daniel Mota-Rojas
- Neurophysiology, Behavior and Animal Welfare Assessment, DPAA, Universidad Autónoma Metropolitana (UAM), Mexico City 04960, Mexico; (A.D.-O.); (J.G.-P.); (A.C.-A.); (P.S.)
- Correspondence:
| | - Julio Martínez-Burnes
- Animal Health Group, Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma de Tamaulipas, Victoria City 87000, Tamaulipas, Mexico;
| | - Dina Villanueva-García
- Division of Neonatology, National Institute of Health, Hospital Infantil de México Federico Gómez, Doctor Márquez 162, Mexico City 06720, Mexico;
| | - Adriana Domínguez-Oliva
- Neurophysiology, Behavior and Animal Welfare Assessment, DPAA, Universidad Autónoma Metropolitana (UAM), Mexico City 04960, Mexico; (A.D.-O.); (J.G.-P.); (A.C.-A.); (P.S.)
| | - Jocelyn Gómez-Prado
- Neurophysiology, Behavior and Animal Welfare Assessment, DPAA, Universidad Autónoma Metropolitana (UAM), Mexico City 04960, Mexico; (A.D.-O.); (J.G.-P.); (A.C.-A.); (P.S.)
| | - Patricia Mora-Medina
- Department of Livestock Science, FESC, Universidad Nacional Autónoma de México (UNAM), Cuautitlán Izcalli 54714, Mexico;
| | - Alejandro Casas-Alvarado
- Neurophysiology, Behavior and Animal Welfare Assessment, DPAA, Universidad Autónoma Metropolitana (UAM), Mexico City 04960, Mexico; (A.D.-O.); (J.G.-P.); (A.C.-A.); (P.S.)
| | - Adriana Olmos-Hernández
- Division of Biotechnology—Bioterio and Experimental Surgery, Instituto Nacional de Rehabilitación-Luis Guillermo Ibarra Ibarra (INR-LGII), Mexico City 14389, Mexico;
| | - Paola Soto
- Neurophysiology, Behavior and Animal Welfare Assessment, DPAA, Universidad Autónoma Metropolitana (UAM), Mexico City 04960, Mexico; (A.D.-O.); (J.G.-P.); (A.C.-A.); (P.S.)
| | - Ramon Muns
- Agri-Food and Biosciences Institute, Livestock Production Sciences Unit, Hillsborough BT26 6DR, Northern Ireland, UK;
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3
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Yu X, Li W. Comparative insights into the integration mechanism of neuropeptides to starvation and temperature stress. Gen Comp Endocrinol 2022; 316:113945. [PMID: 34826429 DOI: 10.1016/j.ygcen.2021.113945] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 08/08/2021] [Accepted: 11/18/2021] [Indexed: 11/29/2022]
Abstract
Stress is known as the process of biological responses evoked by internal or external stimuli. The ability to sense, integrate and respond to stress signals is a requisite for life. Temperature and photoperiod are very important environmental factors for animals. In addition, stress signals can also be inputted from peripheral tissue, such as starvation and inflammation. Through afferent pathways, stress signals input to the central nervous system (CNS), where various signals will integrate, and the integrated information will transmit to the peripheral effectors. As the regulators of neural activity, neuropeptides play important roles in these processes. The present review summarizes recent findings about the integration mechanism of stress signals in the CNS, emphasizing on the role of neuropeptides.
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Affiliation(s)
- Xiaozheng Yu
- State Key Laboratory of Biocontrol, Institute of Aquatic Economic Animals and Guangdong Province Key Laboratory for Aquatic Economic Animals, Provincial Engineering Technology Research Center for Healthy Breeding of Important Economic Fish, School of Life Sciences, Sun Yat-Sen University, Guangzhou, China
| | - Wensheng Li
- State Key Laboratory of Biocontrol, Institute of Aquatic Economic Animals and Guangdong Province Key Laboratory for Aquatic Economic Animals, Provincial Engineering Technology Research Center for Healthy Breeding of Important Economic Fish, School of Life Sciences, Sun Yat-Sen University, Guangzhou, China.
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4
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Maksymchuk N, Sakurai A, Cox DN, Cymbalyuk G. Transient and Steady-State Properties of Drosophila Sensory Neurons Coding Noxious Cold Temperature. Front Cell Neurosci 2022; 16:831803. [PMID: 35959471 PMCID: PMC9358291 DOI: 10.3389/fncel.2022.831803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Accepted: 06/09/2022] [Indexed: 12/04/2022] Open
Abstract
Coding noxious cold signals, such as the magnitude and rate of temperature change, play essential roles in the survival of organisms. We combined electrophysiological and computational neuroscience methods to investigate the neural dynamics of Drosophila larva cold-sensing Class III (CIII) neurons. In response to a fast temperature change (-2 to -6°C/s) from room temperature to noxious cold, the CIII neurons exhibited a pronounced peak of a spiking rate with subsequent relaxation to a steady-state spiking. The magnitude of the peak was higher for a higher rate of temperature decrease, while slow temperature decrease (-0.1°C/s) evoked no distinct peak of the spiking rate. The rate of the steady-state spiking depended on the magnitude of the final temperature and was higher at lower temperatures. For each neuron, we characterized this dependence by estimating the temperature of the half activation of the spiking rate by curve fitting neuron's spiking rate responses to a Boltzmann function. We found that neurons had a temperature of the half activation distributed over a wide temperature range. We also found that CIII neurons responded to decrease rather than increase in temperature. There was a significant difference in spiking activity between fast and slow returns from noxious cold to room temperature: The CIII neurons usually stopped activity abruptly in the case of the fast return and continued spiking for some time in the case of the slow return. We developed a biophysical model of CIII neurons using a generalized description of transient receptor potential (TRP) current kinetics with temperature-dependent activation and Ca2+-dependent inactivation. This model recapitulated the key features of the spiking rate responses found in experiments and suggested mechanisms explaining the transient and steady-state activity of the CIII neurons at different cold temperatures and rates of their decrease and increase. We conclude that CIII neurons encode at least three types of cold sensory information: the rate of temperature decrease by a peak of the firing rate, the magnitude of cold temperature by the rate of steady spiking activity, and direction of temperature change by spiking activity augmentation or suppression corresponding to temperature decrease and increase, respectively.
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Affiliation(s)
- Natalia Maksymchuk
- Neuroscience Institute, Georgia State University, Atlanta, GA, United States
| | - Akira Sakurai
- Neuroscience Institute, Georgia State University, Atlanta, GA, United States
| | - Daniel N Cox
- Neuroscience Institute, Georgia State University, Atlanta, GA, United States
| | - Gennady Cymbalyuk
- Neuroscience Institute, Georgia State University, Atlanta, GA, United States.,Department of Physics and Astronomy, Georgia State University, Atlanta, GA, United States
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5
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Di Donato M, Ostacolo C, Giovannelli P, Di Sarno V, Monterrey IMG, Campiglia P, Migliaccio A, Bertamino A, Castoria G. Therapeutic potential of TRPM8 antagonists in prostate cancer. Sci Rep 2021; 11:23232. [PMID: 34853378 PMCID: PMC8636514 DOI: 10.1038/s41598-021-02675-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Accepted: 11/22/2021] [Indexed: 12/27/2022] Open
Abstract
Transient receptor potential melastatin-8 (TRPM8) represents an emerging target in prostate cancer, although its mechanism of action remains unclear. Here, we have characterized and investigated the effects of TRPM8 modulators in prostate cancer aggressiveness disclosing the molecular mechanism underlying their biological activity. Patch-clamp and calcium fluorometric assays were used to characterize the synthesized compounds. Androgen-stimulated prostate cancer-derived cells were challenged with the compounds and the DNA synthesis was investigated in a preliminary screening. The most effective compounds were then employed to inhibit the pro-metastatic behavior of in various PC-derived cells, at different degree of malignancy. The effect of the compounds was then assayed in prostate cancer cell-derived 3D model and the molecular targets of selected compounds were lastly identified using transcriptional and non-transcriptional reporter assays. TRPM8 antagonists inhibit the androgen-dependent prostate cancer cell proliferation, migration and invasiveness. They are highly effective in reverting the androgen-induced increase in prostate cancer cell spheroid size. The compounds also revert the proliferation of castrate-resistant prostate cancer cells, provided they express the androgen receptor. In contrast, no effects were recorded in prostate cancer cells devoid of the receptor. Selected antagonists interfere in non-genomic androgen action and abolish the androgen-induced androgen receptor/TRPM8 complex assembly as well as the increase in intracellular calcium levels in prostate cancer cells. Our results shed light in the processes controlling prostate cancer progression and make the transient receptor potential melastatin-8 as a ‘druggable’ target in the androgen receptor-expressing prostate cancers.
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Affiliation(s)
- Marzia Di Donato
- Department of Precision Medicine, School of Medicine, University of Campania 'L. Vanvitelli', Via L. De Crecchio 7, 80138, Naples, Italy
| | - Carmine Ostacolo
- Department of Pharmacy, University Federico II of Naples, Via D. Montesano 49, 80131, Naples, Italy
| | - Pia Giovannelli
- Department of Precision Medicine, School of Medicine, University of Campania 'L. Vanvitelli', Via L. De Crecchio 7, 80138, Naples, Italy
| | - Veronica Di Sarno
- Department of Pharmacy, University of Salerno, Via G.Paolo II, 84084, Fisciano, SA, Italy
| | - Isabel M Gomez Monterrey
- Department of Pharmacy, University Federico II of Naples, Via D. Montesano 49, 80131, Naples, Italy
| | - Pietro Campiglia
- Department of Pharmacy, University of Salerno, Via G.Paolo II, 84084, Fisciano, SA, Italy
| | - Antimo Migliaccio
- Department of Precision Medicine, School of Medicine, University of Campania 'L. Vanvitelli', Via L. De Crecchio 7, 80138, Naples, Italy
| | - Alessia Bertamino
- Department of Pharmacy, University of Salerno, Via G.Paolo II, 84084, Fisciano, SA, Italy.
| | - Gabriella Castoria
- Department of Precision Medicine, School of Medicine, University of Campania 'L. Vanvitelli', Via L. De Crecchio 7, 80138, Naples, Italy.
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6
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Bianchini G, Tomassetti M, Lillini S, Sirico A, Bovolenta S, Za L, Liberati C, Novelli R, Aramini A. Discovery of Novel TRPM8 Blockers Suitable for the Treatment of Somatic and Ocular Painful Conditions: A Journey through p Ka and LogD Modulation. J Med Chem 2021; 64:16820-16837. [PMID: 34762442 DOI: 10.1021/acs.jmedchem.1c01647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Transient receptor potential melastatin 8 (TRPM8) is crucially involved in pain modulation and perception, and TRPM8 antagonists have been proposed as potential therapeutic approaches for pain treatment. Previously, we developed two TRPM8 antagonists and proposed them as drug candidates for topical and systemic pain treatment. Here, we describe the design and synthesis of these two TRPM8 antagonists (27 and 45) and the rational approach of modulation/replacement of bioisosteric chemical groups, which allowed us to identify a combination of narrow ranges of pKa and LogD values that were crucial to ultimately optimize their potency and metabolic stability. Following the same approach, we then pursued the development of new TRPM8 antagonists suitable for the topical treatment of ocular painful conditions and identified two new compounds (51 and 59), N-alkoxy amide derivatives, that can permeate across ocular tissue and reduce the behavioral responses induced by the topical ocular menthol challenge in vivo.
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Affiliation(s)
- Gianluca Bianchini
- Research and Early Development, Dompé Farmaceutici S.p.A., Via Campo di Pile, 67100 L'Aquila, Italy
| | - Mara Tomassetti
- Research and Early Development, Dompé Farmaceutici S.p.A., Via De Amicis 95, 80131 Napoli, Italy
| | - Samuele Lillini
- Research and Early Development, Dompé Farmaceutici S.p.A., Via De Amicis 95, 80131 Napoli, Italy
| | - Anna Sirico
- Research and Early Development, Dompé Farmaceutici S.p.A., Via De Amicis 95, 80131 Napoli, Italy
| | | | - Lorena Za
- Axxam S.p.A, Via Meucci 3, 20091 Bresso, Italy
| | | | - Rubina Novelli
- Research and Early Development, Dompé Farmaceutici S.p.A., Via Santa Lucia 6, 20122 Milano, Italy
| | - Andrea Aramini
- Research and Early Development, Dompé Farmaceutici S.p.A., Via Campo di Pile, 67100 L'Aquila, Italy
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7
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Henao JC, Grismaldo A, Barreto A, Rodríguez-Pardo VM, Mejía-Cruz CC, Leal-Garcia E, Pérez-Núñez R, Rojas P, Latorre R, Carvacho I, Torres YP. TRPM8 Channel Promotes the Osteogenic Differentiation in Human Bone Marrow Mesenchymal Stem Cells. Front Cell Dev Biol 2021; 9:592946. [PMID: 33614639 PMCID: PMC7890257 DOI: 10.3389/fcell.2021.592946] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2020] [Accepted: 01/05/2021] [Indexed: 11/29/2022] Open
Abstract
Various families of ion channels have been characterized in mesenchymal stem cells (MSCs), including some members of transient receptor potential (TRP) channels family. TRP channels are involved in critical cellular processes as differentiation and cell proliferation. Here, we analyzed the expression of TRPM8 channel in human bone marrow MSCs (hBM-MSCs), and its relation with osteogenic differentiation. Patch-clamp recordings showed that hBM-MSCs expressed outwardly rectifying currents which were increased by exposure to 500 μM menthol and were partially inhibited by 10 μM of BCTC, a TRPM8 channels antagonist. Additionally, we have found the expression of TRPM8 by RT-PCR and western blot. We also explored the TRPM8 localization in hBM-MSCs by immunofluorescence using confocal microscopy. Remarkably, hBM-MSCs treatment with 100 μM of menthol or 10 μM of icilin, TRPM8 agonists, increases osteogenic differentiation. Conversely, 20 μM of BCTC, induced a decrease of osteogenic differentiation. These results suggest that TRPM8 channels are functionally active in hBM-MSCs and have a role in cell differentiation.
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Affiliation(s)
- Juan C Henao
- Departamento de Nutrición y Bioquímica, Facultad de Ciencias, Pontificia Universidad Javeriana, Bogotá, Colombia
| | - Adriana Grismaldo
- Departamento de Nutrición y Bioquímica, Facultad de Ciencias, Pontificia Universidad Javeriana, Bogotá, Colombia
| | - Alfonso Barreto
- Grupo de Inmunobiología y Biología Celular, Departamento de Microbiología, Facultad de Ciencias, Pontificia Universidad Javeriana, Bogotá, Colombia
| | - Viviana M Rodríguez-Pardo
- Grupo de Inmunobiología y Biología Celular, Departamento de Microbiología, Facultad de Ciencias, Pontificia Universidad Javeriana, Bogotá, Colombia
| | - Claudia Camila Mejía-Cruz
- Grupo de Inmunobiología y Biología Celular, Departamento de Microbiología, Facultad de Ciencias, Pontificia Universidad Javeriana, Bogotá, Colombia
| | - Efrain Leal-Garcia
- Departamento de Ortopedia y Traumatología, Facultad de Medicina, Pontificia Universidad Javeriana, Bogotá, Colombia
| | | | - Patricio Rojas
- Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile
| | - Ramón Latorre
- Centro Interdisciplinario de Neurociencia de Valparaíso, Facultad de Ciencias, Universidad de Valparaíso, Valparaíso, Chile
| | - Ingrid Carvacho
- Department of Biology and Chemistry, Faculty of Basic Sciences, Universidad Católica del Maule, Talca, Chile
| | - Yolima P Torres
- Departamento de Nutrición y Bioquímica, Facultad de Ciencias, Pontificia Universidad Javeriana, Bogotá, Colombia
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8
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TEREZA DENISEM, BALDASSO GABRIELAM, PAES RODRIGOS, PACHECO MARIAE, ROSA PATRÍCIAP, VENDRAMINE BEATRIZ, HULSE SERGIOC, CAPASSO RAFFAELE, DUTRA RAFAELC. Evaluation of the protocol for thirst management using ice popsicles in the immediate postoperative period: A pilot study in southern Brazilian hospital. AN ACAD BRAS CIENC 2021. [DOI: 10.1590/0001-3765202120201260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
- DENISE M. TEREZA
- Universidade Federal de Santa Catarina, Brazil; Universidade Federal de Santa Catarina, Brazil
| | | | | | | | | | | | | | | | - RAFAEL C. DUTRA
- Universidade Federal de Santa Catarina, Brazil; Universidade Federal de Santa Catarina, Brazil
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9
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Potapova TA, Romashchenko AG, Yudin NS, Voevoda MI. Ethnicity-specific distribution of <em>TRPM8</em> gene variants in Eurasian populations: signs of selection. Vavilovskii Zhurnal Genet Selektsii 2020. [DOI: 10.18699/vj20.45-o] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Affiliation(s)
- T. A. Potapova
- Institute of Cytology and Genetics of Siberian Branch of the Russian Academy of Sciences
| | - A. G. Romashchenko
- Institute of Cytology and Genetics of Siberian Branch of the Russian Academy of Sciences
| | - N. S. Yudin
- Institute of Cytology and Genetics of Siberian Branch of the Russian Academy of Sciences; Novosibirsk State University
| | - M. I. Voevoda
- Institute of Cytology and Genetics of Siberian Branch of the Russian Academy of Sciences;
Federal Research Center of Fundamental and Translational Medicine; Novosibirsk State University
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10
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Aroni P, Fonseca LF, Ciol MA, Margatho AS, Galvão CM. The use of mentholated popsicle to reduce thirst during preoperative fasting: A randomised controlled trial. J Clin Nurs 2019; 29:840-851. [DOI: 10.1111/jocn.15138] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 09/17/2019] [Accepted: 11/19/2019] [Indexed: 01/08/2023]
Affiliation(s)
- Patricia Aroni
- Department of Nursing State University of Londrina Londrina Brazil
| | - Ligia F. Fonseca
- Department of Nursing State University of Londrina Londrina Brazil
| | - Marcia A. Ciol
- Department of Rehabilitation Medicine School of Medicine University of Washington Seattle WA USA
| | - Amanda S. Margatho
- General and Specialized Nursing Department Ribeirão Preto College of Nursing University of São Paulo Ribeirão Preto Brazil
| | - Cristina M. Galvão
- General and Specialized Nursing Department Ribeirão Preto College of Nursing University of São Paulo Ribeirão Preto Brazil
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11
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Garcia AKA, Furuya RK, Conchon MF, Rossetto EG, Dantas RAS, Fonseca LF. Menthol chewing gum on preoperative thirst management: randomized clinical trial. Rev Lat Am Enfermagem 2019; 27:e3180. [PMID: 31596415 PMCID: PMC6781380 DOI: 10.1590/1518-8345.3070.3180] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Accepted: 04/15/2019] [Indexed: 01/15/2023] Open
Abstract
Objective to evaluate the effectiveness of menthol chewing gum, in the relief of the
intensity and discomfort of the surgical patient’s thirst in the
preoperative period. Method a randomized controlled trial, with 102 patients in the preoperative period,
randomized in a control group, with usual care, and an experimental group,
which received menthol gum, which was the study treatment variable. The
primary clinical outcome was the variation in thirst intensity, evaluated by
the Numeral Verbal Scale, and the secondary, the variation of the discomfort
of thirst, evaluated by the Perioperative Thirst Discomfort Scale.
Mann-Whitney test was used to compare measures between groups. The
significance level adopted was of 0.05. Results menthol chewing gum significantly reduced the intensity (p <0.001), with
Cohen’s medium-effect d, and thirst discomfort (p <0.001), with a
large-effect Cohen’s d. Conclusion menthol chewing gum was effective in reducing the intensity and discomfort
of preoperative thirst. The strategy proved to be an innovative, feasible
and safe option in the use for the surgical patient, in the management of
the preoperative thirst, in elective surgeries. NCT: 03200197.
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Affiliation(s)
- Aline Korki Arrabal Garcia
- Universidade Estadual de Londrina, Londrina, PR, Brasil.,Bolsista da Fundação Araucária de Apoio ao Desenvolvimento Científico e Tecnológico do Estado do Paraná (FA), Brasil.,Bolsista do Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), Brasil
| | | | - Marilia Ferrari Conchon
- Universidade de São Paulo,Escola de Enfermagem de Ribeirão Preto, Centro Colaborador da OPAS/OMS para o Desenvolvimento da Pesquisa em Enfermagem,Ribeirão Preto, SP, Brasil
| | | | - Rosana Aparecida Spadoti Dantas
- Universidade de São Paulo,Escola de Enfermagem de Ribeirão Preto, Centro Colaborador da OPAS/OMS para o Desenvolvimento da Pesquisa em Enfermagem,Ribeirão Preto, SP, Brasil
| | - Ligia Fahl Fonseca
- Universidade Estadual de Londrina, Departamento de Enfermagem, Londrina, PR, Brasil
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12
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Silva DF, Wenceslau CF, Mccarthy CG, Szasz T, Ogbi S, Webb RC. TRPM8 channel activation triggers relaxation of pudendal artery with increased sensitivity in the hypertensive rats. Pharmacol Res 2019; 147:104329. [PMID: 31340190 DOI: 10.1016/j.phrs.2019.104329] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 06/11/2019] [Accepted: 06/21/2019] [Indexed: 01/03/2023]
Abstract
INTRODUCTION Erectile dysfunction (ED) is frequently encountered in patients with arterial hypertension and there is a recent functional correlation between the expression of thermoreceptor channels TRPM8 (melastatin 8) and alterations in blood pressure in hypertension. The aim of this study was to investigate the function of cold-sensing TRPM8 channel in internal pudendal artery (IPA) in both normotensive and hypertensive rats. METHODS We performed experiments integrating physiological, pharmacological, biochemical and cellular techniques. RESULTS TRPM8 channels are expressed in the IPA and in vascular smooth muscle cells from IPA. In addition, TRPM8 activation, by both a cooling compound icilin (82.1 ± 3.0%, n = 6) and cold temperature [thermal stimulus, basal tone (25 °C, 41.2 ± 3.4%, n = 5) or pre-contracted tone induced by phenylephrine (25 °C, 87.0 ± 3.6%, n = 7)], induced relaxation in IPA. Furthermore, the results showed that the concentration-response curve to icilin was significantly shifted to the right in different conditions, such as: the absence of the vascular endothelium, in the presence of L-NAME (10-4 M), or indomethacin (10-5 M) or by a combination of charybdotoxin (10-7 M) and apamin (5 × 10-6 M), and Y27632 (10-6 M). Interestingly, icilin-induced vasodilation was significantly higher in IPA from spontaneously hypertensive (SHR, E10-4M = 75.3 ± 1.7%) compared to wistar rats (E10-4M = 56.4 ± 2.6%), despite no changes in the TRPM8 expression in IPA between the strains, suggesting that the sensitivity of TRPM8 channels is higher in SHR. CONCLUSIONS These data demonstrate for the first time, the expression and function of TRPM8 channels in the IPA involving, at least in part, endothelium-derived relaxing factors and ROCK inhibition. Overall, this channel could potentially be a new target for the treatment of hypertension associated-ED.
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Affiliation(s)
- Darizy Flavia Silva
- Department of Bioregulation, Federal University of Bahia, Salvador, BA, Brazil.
| | - Camilla Ferreira Wenceslau
- Department of Physiology & Pharmacology, University of Toledo College of Medicine and Life Sciences, Toledo, OH, USA
| | - Cameron G Mccarthy
- Department of Physiology & Pharmacology, University of Toledo College of Medicine and Life Sciences, Toledo, OH, USA
| | - Theodora Szasz
- Department of Physiology, Augusta University, Augusta, GA, USA
| | - Safia Ogbi
- Department of Physiology, Augusta University, Augusta, GA, USA
| | - R Clinton Webb
- Department of Physiology, Augusta University, Augusta, GA, USA
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13
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Hantute-Ghesquier A, Haustrate A, Prevarskaya N, Lehen'kyi V. TRPM Family Channels in Cancer. Pharmaceuticals (Basel) 2018; 11:ph11020058. [PMID: 29875336 PMCID: PMC6027338 DOI: 10.3390/ph11020058] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Revised: 05/28/2018] [Accepted: 06/01/2018] [Indexed: 12/11/2022] Open
Abstract
Members of the TRPM ("Melastatin") family fall into the subclass of the TRP channels having varying permeability to Ca2+ and Mg2+, with three members of the TRPM family being chanzymes, which contain C-terminal enzyme domains. The role of different TRPM members has been shown in various cancers such as prostate cancer for mostly TRPM8 and TRPM2, breast cancer for mostly TRPM2 and TRPM7, and pancreatic cancer for TRPM2/7/8 channels. The role of TRPM5 channels has been shown in lung cancer, TRPM1 in melanoma, and TRPM4 channel in prostate cancer as well. Thus, the TRPM family of channels may represent an appealing target for the anticancer therapy.
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Affiliation(s)
- Aline Hantute-Ghesquier
- Laboratory of Cell Physiology, INSERM U1003, Laboratory of Excellence Ion Channels Science and Therapeutics, Department of Biology, Faculty of Science and Technologies, University of Lille, 59650 Villeneuve d'Ascq, France.
| | - Aurélien Haustrate
- Laboratory of Cell Physiology, INSERM U1003, Laboratory of Excellence Ion Channels Science and Therapeutics, Department of Biology, Faculty of Science and Technologies, University of Lille, 59650 Villeneuve d'Ascq, France.
- FONDATION ARC, 9 rue Guy Môquet 94830 Villejuif, France.
| | - Natalia Prevarskaya
- Laboratory of Cell Physiology, INSERM U1003, Laboratory of Excellence Ion Channels Science and Therapeutics, Department of Biology, Faculty of Science and Technologies, University of Lille, 59650 Villeneuve d'Ascq, France.
| | - V'yacheslav Lehen'kyi
- Laboratory of Cell Physiology, INSERM U1003, Laboratory of Excellence Ion Channels Science and Therapeutics, Department of Biology, Faculty of Science and Technologies, University of Lille, 59650 Villeneuve d'Ascq, France.
- FONDATION ARC, 9 rue Guy Môquet 94830 Villejuif, France.
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14
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Abstract
Chronic obstructive pulmonary disease (COPD) and asthma are both common respiratory diseases that are associated with airflow reduction/obstruction and pulmonary inflammation. Whilst drug therapies offer adequate symptom control for many mild to moderate asthmatic patients, severe asthmatics and COPD patients symptoms are often not controlled, and in these cases, irreversible structural damage occurs with disease progression over time. Transient receptor potential (TRP) channels, in particular TRPV1, TRPA1, TRPV4 and TRPM8, have been implicated with roles in the regulation of inflammation and autonomic nervous control of the lungs. Evidence suggests that inflammation elevates levels of activators and sensitisers of TRP channels and additionally that TRP channel expression may be increased, resulting in excessive channel activation. The enhanced activity of these channels is thought to then play a key role in the propagation and maintenance of the inflammatory disease state and neuronal symptoms such as bronchoconstriction and cough. For TRPM8 the evidence is less clear, but as with TRPV1, TRPA1 and TRPV4, antagonists are being developed by multiple companies for indications including asthma and COPD, which will help in elucidating their role in respiratory disease.
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Novel selective, potent naphthyl TRPM8 antagonists identified through a combined ligand- and structure-based virtual screening approach. Sci Rep 2017; 7:10999. [PMID: 28887460 PMCID: PMC5591244 DOI: 10.1038/s41598-017-11194-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2017] [Accepted: 07/21/2017] [Indexed: 02/03/2023] Open
Abstract
Transient receptor potential melastatin 8 (TRPM8), a nonselective cation channel, is the predominant mammalian cold temperature thermosensor and it is activated by cold temperatures and cooling compounds, such as menthol and icilin. Because of its role in cold allodynia, cold hyperalgesia and painful syndromes TRPM8 antagonists are currently being pursued as potential therapeutic agents for the treatment of pain hypersensitivity. Recently TRPM8 has been found in subsets of bladder sensory nerve fibres, providing an opportunity to understand and treat chronic hypersensitivity. However, most of the known TRPM8 inhibitors lack selectivity, and only three selective compounds have reached clinical trials to date. Here, we applied two virtual screening strategies to find new, clinics suitable, TRPM8 inhibitors. This strategy enabled us to identify naphthyl derivatives as a novel class of potent and selective TRPM8 inhibitors. Further characterization of the pharmacologic properties of the most potent compound identified, compound 1, confirmed that it is a selective, competitive antagonist inhibitor of TRPM8. Compound 1 also proved itself active in a overreactive bladder model in vivo. Thus, the novel naphthyl derivative compound identified here could be optimized for clinical treatment of pain hypersensitivity in bladder disorders but also in different other pathologies.
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Synthesis, high-throughput screening and pharmacological characterization of β-lactam derivatives as TRPM8 antagonists. Sci Rep 2017; 7:10766. [PMID: 28883526 PMCID: PMC5589751 DOI: 10.1038/s41598-017-10913-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Accepted: 08/16/2017] [Indexed: 01/19/2023] Open
Abstract
The mammalian transient receptor potential melastatin channel 8 (TRPM8), highly expressed in trigeminal and dorsal root ganglia, mediates the cooling sensation and plays an important role in the cold hypersensitivity characteristic of some types of neuropathic pain, as well as in cancer. Consequently, the identification of selective and potent ligands for TRPM8 is of great interest. Here, a series of compounds, having a β-lactam central scaffold, were prepared to explore the pharmacophore requirements for TRPM8 modulation. Structure-activity studies indicate that the minimal requirements for potent β-lactam-based TRPM8 blockers are hydrophobic groups (benzyl preferentially or tBu) on R1, R2, R3 and R5 and a short N-alkyl chain (≤3 carbons). The best compounds in the focused library (41 and 45) showed IC50 values of 46 nM and 83 nM, respectively, in electrophysiology assays. These compounds selectively blocked all modalities of TRPM8 activation, i.e. menthol, voltage, and temperature. Molecular modelling studies using a homology model of TRPM8 identified two putative binding sites, involving networks of hydrophobic interactions, and suggesting a negative allosteric modulation through the stabilization of the closed state. Thus, these β-lactams provide a novel pharmacophore scaffold to evolve TRPM8 allosteric modulators to treat TRPM8 channel dysfunction.
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17
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Role of the Excitability Brake Potassium Current I KD in Cold Allodynia Induced by Chronic Peripheral Nerve Injury. J Neurosci 2017; 37:3109-3126. [PMID: 28179555 DOI: 10.1523/jneurosci.3553-16.2017] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Revised: 01/24/2017] [Accepted: 01/26/2017] [Indexed: 11/21/2022] Open
Abstract
Cold allodynia is a common symptom of neuropathic and inflammatory pain following peripheral nerve injury. The mechanisms underlying this disabling sensory alteration are not entirely understood. In primary somatosensory neurons, cold sensitivity is mainly determined by a functional counterbalance between cold-activated TRPM8 channels and Shaker-like Kv1.1-1.2 channels underlying the excitability brake current IKD Here we studied the role of IKD in damage-triggered painful hypersensitivity to innocuous cold. We found that cold allodynia induced by chronic constriction injury (CCI) of the sciatic nerve in mice, was related to both an increase in the proportion of cold-sensitive neurons (CSNs) in DRGs contributing to the sciatic nerve, and a decrease in their cold temperature threshold. IKD density was reduced in high-threshold CSNs from CCI mice compared with sham animals, with no differences in cold-induced TRPM8-dependent current density. The electrophysiological properties and neurochemical profile of CSNs revealed an increase of nociceptive-like phenotype among neurons from CCI animals compared with sham mice. These results were validated using a mathematical model of CSNs, including IKD and TRPM8, showing that a reduction in IKD current density shifts the thermal threshold to higher temperatures and that the reduction of this current induces cold sensitivity in former cold-insensitive neurons expressing low levels of TRPM8-like current. Together, our results suggest that cold allodynia is largely due to a functional downregulation of IKD in both high-threshold CSNs and in a subpopulation of polymodal nociceptors expressing TRPM8, providing a general molecular and neural mechanism for this sensory alteration.SIGNIFICANCE STATEMENT This paper unveils the critical role of the brake potassium current IKD in damage-triggered cold allodynia. Using a well-known form of nerve injury and combining behavioral analysis, calcium imaging, patch clamping, and pharmacological tools, validated by mathematical modeling, we determined that the functional expression of IKD is reduced in sensory neurons in response to peripheral nerve damage. This downregulation not only enhances cold sensitivity of high-threshold cold thermoreceptors signaling cold discomfort, but it also transforms a subpopulation of polymodal nociceptors signaling pain into neurons activated by mild temperature drops. Our results suggest that cold allodynia is linked to a reduction of IKD in both high-threshold cold thermoreceptors and nociceptors expressing TRPM8, providing a general model for this form of cold-induced pain.
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18
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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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19
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González A, Herrera G, Ugarte G, Restrepo C, Piña R, Pertusa M, Orio P, Madrid R. IKD Current in Cold Transduction and Damage-Triggered Cold Hypersensitivity. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 1015:265-277. [PMID: 29080031 DOI: 10.1007/978-3-319-62817-2_14] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
In primary sensory neurons of the spinal and trigeminal somatosensory system, cold-sensitivity is strongly dependent on the functional balance between TRPM8 channels, the main molecular entity responsible for the cold-activated excitatory current, and Shaker-like Kv1.1-1.2 potassium channels, the molecular counterpart underlying the excitability brake current IKD. This slow-inactivating outward K+ current reduces the excitability of cold thermoreceptor neurons increasing their thermal threshold, and prevents unspecific activation by cold of neurons of other somatosensory modalities. Here we examine the main biophysical properties of this current in primary sensory neurons, its central role in cold thermotransduction, and its contribution to alterations in cold sensitivity triggered by peripheral nerve damage.
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Affiliation(s)
- Alejandro González
- Departamento de Biología, Facultad de Química y Biología, and Millennium Nucleus of Ion Channels-Associated Diseases (MiNICAD), Universidad de Santiago de Chile, Alameda L. Bdo. O'Higgins 3363, 9160000, Santiago, Chile
| | - Gaspar Herrera
- Centro Interdisciplinario de Neurociencia de Valparaíso and Instituto de Neurociencia, Facultad de Ciencias, Universidad de Valparaíso, 2340000, Valparaíso, Chile
| | - Gonzalo Ugarte
- Departamento de Biología, Facultad de Química y Biología, and Millennium Nucleus of Ion Channels-Associated Diseases (MiNICAD), Universidad de Santiago de Chile, Alameda L. Bdo. O'Higgins 3363, 9160000, Santiago, Chile
| | - Carlos Restrepo
- Departamento de Biología, Facultad de Química y Biología, and Millennium Nucleus of Ion Channels-Associated Diseases (MiNICAD), Universidad de Santiago de Chile, Alameda L. Bdo. O'Higgins 3363, 9160000, Santiago, Chile
| | - Ricardo Piña
- Departamento de Biología, Facultad de Química y Biología, and Millennium Nucleus of Ion Channels-Associated Diseases (MiNICAD), Universidad de Santiago de Chile, Alameda L. Bdo. O'Higgins 3363, 9160000, Santiago, Chile
| | - María Pertusa
- Departamento de Biología, Facultad de Química y Biología, and Millennium Nucleus of Ion Channels-Associated Diseases (MiNICAD), Universidad de Santiago de Chile, Alameda L. Bdo. O'Higgins 3363, 9160000, Santiago, Chile
| | - Patricio Orio
- Centro Interdisciplinario de Neurociencia de Valparaíso and Instituto de Neurociencia, Facultad de Ciencias, Universidad de Valparaíso, 2340000, Valparaíso, Chile
| | - Rodolfo Madrid
- Departamento de Biología, Facultad de Química y Biología, and Millennium Nucleus of Ion Channels-Associated Diseases (MiNICAD), Universidad de Santiago de Chile, Alameda L. Bdo. O'Higgins 3363, 9160000, Santiago, Chile.
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20
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A Coupled Phase-Temperature Model for Dynamics of Transient Neuronal Signal in Mammals Cold Receptor. JOURNAL OF BIOPHYSICS 2016; 2016:2754249. [PMID: 27774102 PMCID: PMC5059653 DOI: 10.1155/2016/2754249] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Revised: 08/17/2016] [Accepted: 08/29/2016] [Indexed: 11/17/2022]
Abstract
We propose a theoretical model consisting of coupled differential equation of membrane potential phase and temperature for describing the neuronal signal in mammals cold receptor. Based on the results from previous work by Roper et al., we modified a nonstochastic phase model for cold receptor neuronal signaling dynamics in mammals. We introduce a new set of temperature adjusted functional parameters which allow saturation characteristic at high and low steady temperatures. The modified model also accommodates the transient neuronal signaling process from high to low temperature by introducing a nonlinear differential equation for the “effective temperature” changes which is coupled to the phase differential equation. This simple model can be considered as a candidate for describing qualitatively the physical mechanism of the corresponding transient process.
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21
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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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22
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Olivares E, Salgado S, Maidana JP, Herrera G, Campos M, Madrid R, Orio P. TRPM8-Dependent Dynamic Response in a Mathematical Model of Cold Thermoreceptor. PLoS One 2015; 10:e0139314. [PMID: 26426259 PMCID: PMC4591370 DOI: 10.1371/journal.pone.0139314] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Accepted: 09/11/2015] [Indexed: 11/30/2022] Open
Abstract
Cold-sensitive nerve terminals (CSNTs) encode steady temperatures with regular, rhythmic temperature-dependent firing patterns that range from irregular tonic firing to regular bursting (static response). During abrupt temperature changes, CSNTs show a dynamic response, transiently increasing their firing frequency as temperature decreases and silencing when the temperature increases (dynamic response). To date, mathematical models that simulate the static response are based on two depolarizing/repolarizing pairs of membrane ionic conductance (slow and fast kinetics). However, these models fail to reproduce the dynamic response of CSNTs to rapid changes in temperature and notoriously they lack a specific cold-activated conductance such as the TRPM8 channel. We developed a model that includes TRPM8 as a temperature-dependent conductance with a calcium-dependent desensitization. We show by computer simulations that it appropriately reproduces the dynamic response of CSNTs from mouse cornea, while preserving their static response behavior. In this model, the TRPM8 conductance is essential to display a dynamic response. In agreement with experimental results, TRPM8 is also needed for the ongoing activity in the absence of stimulus (i.e. neutral skin temperature). Free parameters of the model were adjusted by an evolutionary optimization algorithm, allowing us to find different solutions. We present a family of possible parameters that reproduce the behavior of CSNTs under different temperature protocols. The detection of temperature gradients is associated to a homeostatic mechanism supported by the calcium-dependent desensitization.
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Affiliation(s)
- Erick Olivares
- Centro Interdisciplinario de Neurociencia de Valparaíso, Universidad de Valparaíso, Valparaíso, Chile
| | - Simón Salgado
- Centro Interdisciplinario de Neurociencia de Valparaíso, Universidad de Valparaíso, Valparaíso, Chile
| | - Jean Paul Maidana
- Centro Interdisciplinario de Neurociencia de Valparaíso, Universidad de Valparaíso, Valparaíso, Chile
| | - Gaspar Herrera
- Centro Interdisciplinario de Neurociencia de Valparaíso, Universidad de Valparaíso, Valparaíso, Chile
| | - Matías Campos
- Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile
| | - Rodolfo Madrid
- Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile
| | - Patricio Orio
- Centro Interdisciplinario de Neurociencia de Valparaíso, Universidad de Valparaíso, Valparaíso, Chile
- Instituto de Neurociencia, Facultad de Ciencias, Universidad de Valparaíso, Valparaíso, Chile
- * E-mail:
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23
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Abstract
Thermoregulation is the maintenance of a relatively constant core body temperature. Humans normally maintain a body temperature at 37°C, and maintenance of this relatively high temperature is critical to human survival. This concept is so important that control of thermoregulation is often the principal example cited when teaching physiological homeostasis. A basic understanding of the processes underpinning temperature regulation is necessary for all undergraduate students studying biology and biology-related disciplines, and a thorough understanding is necessary for those students in clinical training. Our aim in this review is to broadly present the thermoregulatory process taking into account current advances in this area. First, we summarize the basic concepts of thermoregulation and subsequently assess the physiological responses to heat and cold stress, including vasodilation and vasoconstriction, sweating, nonshivering thermogenesis, piloerection, shivering, and altered behavior. Current research is presented concerning the body's detection of thermal challenge, peripheral and central thermoregulatory control mechanisms, including brown adipose tissue in adult humans and temperature transduction by the relatively recently discovered transient receptor potential channels. Finally, we present an updated understanding of the neuroanatomic circuitry supporting thermoregulation.
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Affiliation(s)
- Etain A Tansey
- Centre for Biomedical Sciences Education, Queen's University, Belfast, Northern Ireland
| | - Christopher D Johnson
- Centre for Biomedical Sciences Education, Queen's University, Belfast, Northern Ireland
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24
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Efficient entry of cell-penetrating peptide nona-arginine into adherent cells involves a transient increase in intracellular calcium. Biochem J 2015; 471:221-30. [PMID: 26272944 PMCID: PMC4613506 DOI: 10.1042/bj20150272] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Accepted: 08/13/2015] [Indexed: 01/20/2023]
Abstract
Mechanisms by which drug-delivery vehicles based on cationic peptides cross cell membranes remain unknown. We report that an increase in intracellular calcium triggered by temperature drop or high peptide concentrations transiently permeabilizes the plasma membrane for nona-arginine (R9) and delivers it to the cytosol. Understanding the mechanism of entry of cationic peptides such as nona-arginine (R9) into cells remains an important challenge to their use as efficient drug-delivery vehicles. At nanomolar to low micromolar R9 concentrations and at physiological temperature, peptide entry involves endocytosis. In contrast, at a concentration ≥10 μM, R9 induces a very effective non-endocytic entry pathway specific for cationic peptides. We found that a similar entry pathway is induced at 1–2 μM concentrations of R9 if peptide application is accompanied by a rapid temperature drop to 15°C. Both at physiological and at sub-physiological temperatures, this entry mechanism was inhibited by depletion of the intracellular ATP pool. Intriguingly, we found that R9 at 10–20 μM and 37°C induces repetitive spikes in intracellular Ca2+ concentration. This Ca2+ signalling correlated with the efficiency of the peptide entry. Pre-loading cells with the Ca2+ chelator BAPTA (1,2-bis(o-aminophenoxy)ethane-N,N,N′,N′-tetraacetic acid) inhibited both Ca2+ spikes and peptide entry, suggesting that an increase in intracellular Ca2+ precedes and is required for peptide entry. One of the hallmarks of Ca2+ signalling is a transient cell-surface exposure of phosphatidylserine (PS), a lipid normally residing only in the inner leaflet of the plasma membrane. Blocking the accessible PS with the PS-binding domain of lactadherin strongly inhibited non-endocytic R9 entry, suggesting the importance of PS externalization in this process. To conclude, we uncovered a novel mechanistic link between calcium signalling and entry of cationic peptides. This finding will enhance our understanding of the properties of plasma membrane and guide development of future drug-delivery vehicles.
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25
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Abstract
Eye pain is an unpleasant sensory and emotional experience including sensory-discriminative, emotional, cognitive, and behavioral components and supported by distinct, interconnected peripheral and central nervous system elements. Normal or physiological pain results of the stimulation by noxious stimuli of sensory axons of trigeminal ganglion (TG) neurons innervating the eye. These are functionally heterogeneous. Mechano-nociceptors are only excited by noxious mechanical forces. Polymodal nociceptors also respond to heat, exogenous irritants, and endogenous inflammatory mediators, whereas cold thermoreceptors detect moderate temperature changes. Their distinct sensitivity to stimulating forces is determined by the expression of specific classes of ion channels: Piezo2 for mechanical forces, TRPV1 and TRPA1 for heat and chemical agents, and TRPM8 for cold. Pricking pain is evoked by mechano-nociceptors, while polymodal nociceptors are responsible of burning and stinging eye pain; sensations of dryness appear to be mainly evoked by cold thermoreceptors. Mediators released by local inflammation, increase the excitability of eye polymodal nociceptors causing their sensitization and the augmented pain sensations. During chronic inflammation, additional, long-lasting changes in the expression and function of stimulus-transducing and voltage-sensitive ion channels develop, thereby altering polymodal terminal's excitability and evoking chronic inflammatory pain. When trauma, infections, or metabolic processes directly damage eye nerve terminals, these display aberrant impulse firing due to an abnormal expression of transducing and excitability-modulating ion channels. This malfunction evokes 'neuropathic pain' which may also result from abnormal function of higher brain structures where ocular TG neurons project. Eye diseases or ocular surface surgery cause different levels of inflammation and/or nerve injury, which in turn activate sensory fibers of the eye in a variable degree. When inflammation dominates (allergic or actinic kerato-conjunctivitis), polymodal nociceptors are primarily stimulated and sensitized, causing pain. In uncomplicated photorefractive surgery and moderate dry eye, cold thermoreceptors appear to be mainly affected, evoking predominant sensations of unpleasant dryness.
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Affiliation(s)
- Carlos Belmonte
- />Instituto de Neurociencias, Universidad Miguel Hernández-CSIC San Juan de Alicante, Avenida de la Universidad, s/n, 03202 Alicante, Spain
- />Instituto Fernandez Vega, Fundación de Investigación Oftalmológica, Av Doctores Fernández Vega, 34, 33012 Oviedo, Asturias Spain
| | - M. Carmen Acosta
- />Instituto de Neurociencias, Universidad Miguel Hernández-CSIC San Juan de Alicante, Avenida de la Universidad, s/n, 03202 Alicante, Spain
| | - Jesus Merayo-Lloves
- />Instituto Fernandez Vega, Fundación de Investigación Oftalmológica, Av Doctores Fernández Vega, 34, 33012 Oviedo, Asturias Spain
| | - Juana Gallar
- />Instituto de Neurociencias, Universidad Miguel Hernández-CSIC San Juan de Alicante, Avenida de la Universidad, s/n, 03202 Alicante, Spain
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26
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Abstract
The spatial and temporal distribution of receptors constitutes an important mechanism for controlling the magnitude of cellular responses. Several members of the transient receptor potential (TRP) ion channel family can regulate their function by modulating their expression at the plasma membrane (PM) through rapid vesicular translocation and fusion. The mechanisms underlying this regulation are not completely understood, and the contribution of vesicular trafficking to physiological function is unknown. TRPM8 receptors are expressed in mammalian peripheral sensory neurons and are essential for the detection of cold temperatures. Previously, we showed that TRPM8-containing vesicles are segregated into three main pools, immobile at the PM, simple diffusive and corralled-hopping. Here, we show that channel expression at the PM is modulated by TRPM8 agonists in F11 and HEK293T cells. Our results support a model in which the activation of TRPM8 channels, located at the PM, induces a short-lived recruitment of a TRPM8-containing vesicular pool to the cell surface causing a transitory increase in the number of functional channels, affecting intrinsic properties of cold receptor responses. We further demonstrate the requirement of intact vesicular trafficking to support sustained cold responses in the skin of mice.
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Toro CA, Brauchi S. Modulating the surface expression of cold receptors. Temperature (Austin) 2015; 2:160-2. [PMID: 27227017 PMCID: PMC4843869 DOI: 10.1080/23328940.2015.1017087] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2015] [Revised: 02/02/2015] [Accepted: 02/02/2015] [Indexed: 10/29/2022] Open
Abstract
Temperature sensing is essential in every organism in order to adapt and survive. However, the mechanisms by which temperature is perceived and detected remain unclear. Recent findings on thermally-activated ion channels have shed light on the puzzle and unravel molecular entities for temperature detection and transduction in mammals.
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Affiliation(s)
- Carlos A Toro
- Division of Neuroscience, Oregon National Primate Research Center; Oregon Health & Science University ; Beaverton, OR, USA
| | - Sebastian Brauchi
- Instituto de Fisiología; Facultad de Medicina; Universidad Austral de Chile ; Valdivia, Chile
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Gkika D, Lemonnier L, Shapovalov G, Gordienko D, Poux C, Bernardini M, Bokhobza A, Bidaux G, Degerny C, Verreman K, Guarmit B, Benahmed M, de Launoit Y, Bindels RJM, Fiorio Pla A, Prevarskaya N. TRP channel-associated factors are a novel protein family that regulates TRPM8 trafficking and activity. ACTA ACUST UNITED AC 2015; 208:89-107. [PMID: 25559186 PMCID: PMC4284226 DOI: 10.1083/jcb.201402076] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
TCAF1 and TCAF2 bind to TRPM8 and promote its cell surface trafficking but differentially regulate its gating properties, leading to opposing effects on prostate cancer cell migration. TRPM8 is a cold sensor that is highly expressed in the prostate as well as in other non-temperature-sensing organs, and is regulated by downstream receptor–activated signaling pathways. However, little is known about the intracellular proteins necessary for channel function. Here, we identify two previously unknown proteins, which we have named “TRP channel–associated factors” (TCAFs), as new TRPM8 partner proteins, and we demonstrate that they are necessary for channel function. TCAF1 and TCAF2 both bind to the TRPM8 channel and promote its trafficking to the cell surface. However, they exert opposing effects on TRPM8 gating properties. Functional interaction of TCAF1/TRPM8 also leads to a reduction in both the speed and directionality of migration of prostate cancer cells, which is consistent with an observed loss of expression of TCAF1 in metastatic human specimens, whereas TCAF2 promotes migration. The identification of TCAFs introduces a novel mechanism for modulation of TRPM8 channel activity.
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Affiliation(s)
- Dimitra Gkika
- Inserm U1003, Equipe labellisée par la Ligue Nationale Contre le Cancer, Université des Sciences et Technologies de Lille (USTL), 59655 Villeneuve d'Ascq Cedex, France
| | - Loic Lemonnier
- Inserm U1003, Equipe labellisée par la Ligue Nationale Contre le Cancer, Université des Sciences et Technologies de Lille (USTL), 59655 Villeneuve d'Ascq Cedex, France
| | - George Shapovalov
- Inserm U1003, Equipe labellisée par la Ligue Nationale Contre le Cancer, Université des Sciences et Technologies de Lille (USTL), 59655 Villeneuve d'Ascq Cedex, France
| | - Dmitri Gordienko
- Inserm U1003, Equipe labellisée par la Ligue Nationale Contre le Cancer, Université des Sciences et Technologies de Lille (USTL), 59655 Villeneuve d'Ascq Cedex, France
| | - Céline Poux
- Centre national de la Recherche Scientifique (CNRS) UMR 8198 and Laboratoire de Génétique & Evolution des Populations Végétales (GEPV), Université des Sciences et Technologies de Lille (USTL), 59655 Villeneuve d'Ascq Cedex, France
| | - Michela Bernardini
- Inserm U1003, Equipe labellisée par la Ligue Nationale Contre le Cancer, Université des Sciences et Technologies de Lille (USTL), 59655 Villeneuve d'Ascq Cedex, France Department of Life Science and Systems Biology, University of Torino, 10123 Torino, Italy
| | - Alexandre Bokhobza
- Inserm U1003, Equipe labellisée par la Ligue Nationale Contre le Cancer, Université des Sciences et Technologies de Lille (USTL), 59655 Villeneuve d'Ascq Cedex, France
| | - Gabriel Bidaux
- Laboratoire Biophotonique Cellulaire Fonctionnelle, Institut de Recherche Interdisciplinaire, USR3078 Centre National de la Recherche Scientifique, Parc scientifique de la Haute Borne, Villeneuve d'Ascq, F-59655 France
| | - Cindy Degerny
- CNRS UMR 8161, Institut de Biologie de Lille, Université de Lille-Nord de France, Institut Pasteur de Lille, 59019 Lille Cedex, France
| | - Kathye Verreman
- CNRS UMR 8161, Institut de Biologie de Lille, Université de Lille-Nord de France, Institut Pasteur de Lille, 59019 Lille Cedex, France
| | - Basma Guarmit
- Inserm, Institut National de la Santé et de la Recherche Médicale U895, Centre Méditerranéen de Médecine Moléculaire, Hôpitall'Archet, 06204 Nice, France
| | - Mohamed Benahmed
- Inserm, Institut National de la Santé et de la Recherche Médicale U895, Centre Méditerranéen de Médecine Moléculaire, Hôpitall'Archet, 06204 Nice, France
| | - Yvan de Launoit
- CNRS UMR 8161, Institut de Biologie de Lille, Université de Lille-Nord de France, Institut Pasteur de Lille, 59019 Lille Cedex, France
| | - Rene J M Bindels
- Department of Physiology, Radboud University Nijmegen Medical Centre, 6500HB Nijmegen, Netherlands
| | - Alessandra Fiorio Pla
- Inserm U1003, Equipe labellisée par la Ligue Nationale Contre le Cancer, Université des Sciences et Technologies de Lille (USTL), 59655 Villeneuve d'Ascq Cedex, France Department of Life Science and Systems Biology, University of Torino, 10123 Torino, Italy
| | - Natalia Prevarskaya
- Inserm U1003, Equipe labellisée par la Ligue Nationale Contre le Cancer, Université des Sciences et Technologies de Lille (USTL), 59655 Villeneuve d'Ascq Cedex, France
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Kijpornyongpan T, Sereemaspun A, Chanchao C. Dose-dependent cytotoxic effects of menthol on human malignant melanoma A-375 cells: correlation with TRPM8 transcript expression. Asian Pac J Cancer Prev 2014; 15:1551-6. [PMID: 24641366 DOI: 10.7314/apjcp.2014.15.4.1551] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Transient receptor potential melastatin 8 (TRPM8), a principle membrane receptor involved in calcium ion influx and cell signal transduction, has been found to be up-regulated in some cancer types, including melanomas. Efficiency of menthol, an agonist of TRPM8, in killing melanoma cancer cells has been reported previously, but the mechanisms remain unclear. We here determined whether in vitro cytotoxic effects of menthol on A-375 human malignant melanoma cells might be related to TRPM8 transcript expression. MATERIALS AND METHODS The PrestoBlue® cell viability assay was used to assess the in vitro cytotoxic effect of menthol after 24h of treatment. RT-PCR was used to quantify TRPM8 transcript expression levels in normal and menthol- treated cells. Cell morphology was observed under inverted phase contrast light microscopy. RESULTS TRPM8 transcript expression was found at low levels in A-375 cells and down-regulated in a potentially dose-dependent manner by menthol. Menthol exerted in vitro cytotoxic effects on A-375 cells with an IC50 value of 11.8 μM, which was at least as effective as 5-fluorouracil (IC50=120 μM), a commonly applied chemotherapeutic drug. Menthol showed no dose-dependent cytotoxicity on HeLa cells, a TRPM8 non-expressing cell line. CONCLUSIONS The cytotoxic effects on A-375 cells caused by menthol might be related to reduction of the TRPM8 transcript level. This suggests that menthol might activate TRPM8 to increase cytosolic Ca2+ levels, which leads to cytosolic Ca2+ imbalance and triggers cell death.
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Affiliation(s)
- Teeratas Kijpornyongpan
- Department of Biology, Faculty of Science, 2Department of Anatomy, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand E-mail :
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Pezzoli M, Elhamdani A, Camacho S, Meystre J, González SM, le Coutre J, Markram H. Dampened neural activity and abolition of epileptic-like activity in cortical slices by active ingredients of spices. Sci Rep 2014; 4:6825. [PMID: 25359561 PMCID: PMC4215320 DOI: 10.1038/srep06825] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2014] [Accepted: 09/19/2014] [Indexed: 01/24/2023] Open
Abstract
Active ingredients of spices (AIS) modulate neural response in the peripheral nervous system, mainly through interaction with TRP channel/receptors. The present study explores how different AIS modulate neural response in layer 5 pyramidal neurons of S1 neocortex. The AIS tested are agonists of TRPV1/3, TRPM8 or TRPA1. Our results demonstrate that capsaicin, eugenol, menthol, icilin and cinnamaldehyde, but not AITC dampen the generation of APs in a voltage- and time-dependent manner. This effect was further tested for the TRPM8 ligands in the presence of a TRPM8 blocker (BCTC) and on TRPM8 KO mice. The observable effect was still present. Finally, the influence of the selected AIS was tested on in vitro gabazine-induced seizures. Results coincide with the above observations: except for cinnamaldehyde, the same AIS were able to reduce the number, duration of the AP bursts and increase the concentration of gabazine needed to elicit them. In conclusion, our data suggests that some of these AIS can modulate glutamatergic neurons in the brain through a TRP-independent pathway, regardless of whether the neurons are stimulated intracellularly or by hyperactive microcircuitry.
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Affiliation(s)
- Maurizio Pezzoli
- Laboratory of Neural Microcircuitry. Brain and Mind Institute. École Polytechnique Fédérale de Lausanne. Switzerland
| | - Abdeladim Elhamdani
- Laboratory of Neural Microcircuitry. Brain and Mind Institute. École Polytechnique Fédérale de Lausanne. Switzerland
| | - Susana Camacho
- Laboratory of Neural Microcircuitry. Brain and Mind Institute. École Polytechnique Fédérale de Lausanne. Switzerland
- Laboratory of Perception Physiology. Nestlé Research Center. Lausanne, Switzerland
| | - Julie Meystre
- Laboratory of Neural Microcircuitry. Brain and Mind Institute. École Polytechnique Fédérale de Lausanne. Switzerland
| | | | - Johannes le Coutre
- Laboratory of Perception Physiology. Nestlé Research Center. Lausanne, Switzerland
- Organization for Interdisciplinary Research Projects, The University of Tokyo, Tokyo, Japan
| | - Henry Markram
- Laboratory of Neural Microcircuitry. Brain and Mind Institute. École Polytechnique Fédérale de Lausanne. Switzerland
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31
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Miller S, Rao S, Wang W, Liu H, Wang J, Gavva NR. Antibodies to the extracellular pore loop of TRPM8 act as antagonists of channel activation. PLoS One 2014; 9:e107151. [PMID: 25203266 PMCID: PMC4159296 DOI: 10.1371/journal.pone.0107151] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2014] [Accepted: 08/13/2014] [Indexed: 11/18/2022] Open
Abstract
The mammalian transient receptor potential melastatin channel 8 (TRPM8) is highly expressed in trigeminal and dorsal root ganglia. TRPM8 is activated by cold temperature or compounds that cause a cooling sensation, such as menthol or icilin. TRPM8 may play a role in cold hypersensitivity and hyperalgesia in various pain syndromes. Therefore, TRPM8 antagonists are pursued as therapeutics. In this study we explored the feasibility of blocking TRPM8 activation with antibodies. We report the functional characterization of a rabbit polyclonal antibody, ACC-049, directed against the third extracellular loop near the pore region of the human TRPM8 channel. ACC-049 acted as a full antagonist at recombinantly expressed human and rodent TRPM8 channels in cell based agonist-induced 45Ca2+ uptake assays. Further, several poly-and monoclonal antibodies that recognize the same region also blocked icilin activation of not only recombinantly expressed TRPM8, but also endogenous TRPM8 expressed in rat dorsal root ganglion neurons revealing the feasibility of generating monoclonal antibody antagonists. We conclude that antagonist antibodies are valuable tools to investigate TRPM8 function and may ultimately pave the way for development of therapeutic antibodies.
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Affiliation(s)
- Silke Miller
- Department of Neuroscience, Amgen Inc., Thousand Oaks, California, United States of America
| | - Sara Rao
- Department of Neuroscience, Amgen Inc., Thousand Oaks, California, United States of America
| | - Weiya Wang
- Department of Neuroscience, Amgen Inc., Thousand Oaks, California, United States of America
| | - Hantao Liu
- Department of Neuroscience, Amgen Inc., Thousand Oaks, California, United States of America
| | - Judy Wang
- Department of Neuroscience, Amgen Inc., Thousand Oaks, California, United States of America
| | - Narender R. Gavva
- Department of Neuroscience, Amgen Inc., Thousand Oaks, California, United States of America
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32
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Pertusa M, González A, Hardy P, Madrid R, Viana F. Bidirectional modulation of thermal and chemical sensitivity of TRPM8 channels by the initial region of the N-terminal domain. J Biol Chem 2014; 289:21828-43. [PMID: 24917670 DOI: 10.1074/jbc.m114.565994] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
TRPM8, a nonselective cation channel activated by cold, voltage, and cooling compounds such as menthol, is the principal molecular detector of cold temperatures in primary sensory neurons of the somatosensory system. The N-terminal domain of TRPM8 consists of 693 amino acids, but little is known about its contribution to channel function. Here, we identified two distinct regions within the initial N terminus of TRPM8 that contribute differentially to channel activity and proper folding and assembly. Deletion or substitution of the first 40 residues yielded channels with augmented responses to cold and menthol. The thermal threshold of activation of these mutants was shifted 2 °C to higher temperatures, and the menthol dose-response curve was displaced to lower concentrations. Site-directed mutagenesis screening revealed that single point mutations at positions Ser-26 or Ser-27 by proline caused a comparable increase in the responses to cold and menthol. Electrophysiological analysis of the S27P mutant revealed that the enhanced sensitivity to agonists is related to a leftward shift in the voltage dependence of activation, increasing the probability of channel openings at physiological membrane potentials. In addition, we found that the region encompassing positions 40-60 is a key element in the proper folding and assembly of TRPM8. Different deletions and mutations within this region rendered channels with an impaired function that are retained within the endoplasmic reticulum. Our results suggest a critical contribution of the initial region of the N-terminal domain of TRPM8 to thermal and chemical sensitivity and the proper biogenesis of this polymodal ion channel.
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Affiliation(s)
- María Pertusa
- From the Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, 9160000 Santiago, Chile and the Instituto de Neurociencias de Alicante, Universidad Miguel Hernández-Consejo Superior de Investigaciones Científicas, 03550 Alicante, Spain
| | - Alejandro González
- From the Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, 9160000 Santiago, Chile and
| | - Paulina Hardy
- From the Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, 9160000 Santiago, Chile and
| | - Rodolfo Madrid
- From the Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, 9160000 Santiago, Chile and
| | - Félix Viana
- the Instituto de Neurociencias de Alicante, Universidad Miguel Hernández-Consejo Superior de Investigaciones Científicas, 03550 Alicante, Spain
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33
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Transient receptor potential channel ankyrin-1 is not a cold sensor for autonomic thermoregulation in rodents. J Neurosci 2014; 34:4445-52. [PMID: 24671991 DOI: 10.1523/jneurosci.5387-13.2014] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The rodent transient receptor potential ankyrin-1 (TRPA1) channel has been hypothesized to serve as a temperature sensor for thermoregulation in the cold. We tested this hypothesis by using deletion of the Trpa1 gene in mice and pharmacological blockade of the TRPA1 channel in rats. In both Trpa1(-/-) and Trpa1(+/+) mice, severe cold exposure (8°C) resulted in decreases of skin and deep body temperatures to ∼8°C and 13°C, respectively, both temperatures being below the reported 17°C threshold temperature for TRPA1 activation. Under these conditions, Trpa1(-/-) mice had the same dynamics of body temperature as Trpa1(+/+) mice and showed no weakness in the tail skin vasoconstriction response or thermogenic response to cold. In rats, the effects of pharmacological blockade were studied by using two chemically unrelated TRPA1 antagonists: the highly potent and selective compound A967079, which had been characterized earlier, and the relatively new compound 43 ((4R)-1,2,3,4-tetrahydro-4-[3-(3-methoxypropoxy)phenyl]-2-thioxo-5H-indeno[1,2-d]pyrimidin-5-one), which we further characterized in the present study and found to be highly potent (IC50 against cold of ∼8 nm) and selective. Intragastric administration of either antagonist at 30 mg/kg before severe (3°C) cold exposure did not affect the thermoregulatory responses (deep body and tail skin temperatures) of rats, even though plasma concentrations of both antagonists well exceeded their IC50 value at the end of the experiment. In the same experimental setup, blocking the melastatin-8 (TRPM8) channel with AMG2850 (30 mg/kg) attenuated cold-defense mechanisms and led to hypothermia. We conclude that TRPA1 channels do not drive autonomic thermoregulatory responses to cold in rodents.
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Cohen MR, Moiseenkova-Bell VY. Structure of thermally activated TRP channels. CURRENT TOPICS IN MEMBRANES 2014; 74:181-211. [PMID: 25366237 DOI: 10.1016/b978-0-12-800181-3.00007-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Temperature sensation is important for adaptation and survival of organisms. While temperature has the potential to affect all biological macromolecules, organisms have evolved specific thermosensitive molecular detectors that are able to transduce temperature changes into physiologically relevant signals. Among these thermosensors are ion channels from the transient receptor potential (TRP) family. Prime candidates include TRPV1-4, TRPA1, and TRPM8 (the so-called "thermoTRP" channels), which are expressed in sensory neurons and gated at specific temperatures. Electrophysiological and thermodynamic approaches have been employed to determine the nature by which thermoTRPs detect temperature and couple temperature changes to channel gating. To further understand how thermoTRPs sense temperature, high-resolution structures of full-length thermoTRPs channels will be required. Here, we will discuss current progress in unraveling the structures of thermoTRP channels.
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Affiliation(s)
- Matthew R Cohen
- Department of Pharmacology, Case Western Reserve University School of Medicine, Cleveland, OH, USA; Department of Physiology & Biophysics, Case Western Reserve University School of Medicine, Cleveland, OH, USA
| | - Vera Y Moiseenkova-Bell
- Department of Pharmacology, Case Western Reserve University School of Medicine, Cleveland, OH, USA; Department of Physiology & Biophysics, Case Western Reserve University School of Medicine, Cleveland, OH, USA
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35
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Madrid R, Pertusa M. Intimacies and physiological role of the polymodal cold-sensitive ion channel TRPM8. CURRENT TOPICS IN MEMBRANES 2014; 74:293-324. [PMID: 25366241 DOI: 10.1016/b978-0-12-800181-3.00011-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The detection of environmental temperature is critical for the survival of the most diverse organisms. Thermosensitive transient receptor potential (thermoTRP) channels have evolved as a class of ion channels activated by a wide range of temperatures. These molecular thermal sensors are spread through the different TRP channel subfamilies. Among the Melastatin subfamily of TRP channels, the eighth member, TRPM8, is a calcium-permeable cationic ion channel activated by cold, by substances that evoke cold sensation such as menthol, and by voltage. This channel is considered the main molecular entity responsible for the sensitivity to cold of primary sensory neurons of the somatosensory system. Here we present to the readers a summary of some the most relevant biophysical properties, physiological role, and molecular intimacies of this polymodal thermoTRP channel.
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Affiliation(s)
- Rodolfo Madrid
- Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile
| | - María Pertusa
- Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile
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36
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Cao C, Yudin Y, Bikard Y, Chen W, Liu T, Li H, Jendrossek D, Cohen A, Pavlov E, Rohacs T, Zakharian E. Polyester modification of the mammalian TRPM8 channel protein: implications for structure and function. Cell Rep 2013; 4:302-315. [PMID: 23850286 DOI: 10.1016/j.celrep.2013.06.022] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2013] [Revised: 04/01/2013] [Accepted: 06/18/2013] [Indexed: 12/18/2022] Open
Abstract
The TRPM8 ion channel is expressed in sensory neurons and is responsible for sensing environmental cues, such as cold temperatures and chemical compounds, including menthol and icilin. The channel functional activity is regulated by various physical and chemical factors and is likely to be preconditioned by its molecular composition. Our studies indicate that the TRPM8 channel forms a structural-functional complex with the polyester poly-(R)-3-hydroxybutyrate (PHB). We identified by mass spectrometry a number of PHB-modified peptides in the N terminus of the TRPM8 protein and in its extracellular S3-S4 linker. Removal of PHB by enzymatic hydrolysis and site-directed mutagenesis of both the serine residues that serve as covalent anchors for PHB and adjacent hydrophobic residues that interact with the methyl groups of the polymer resulted in significant inhibition of TRPM8 channel activity. We conclude that the TRPM8 channel undergoes posttranslational modification by PHB and that this modification is required for its normal function.
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Affiliation(s)
- Chike Cao
- New Jersey Medical School, UMDNJ, Department of Pharmacology and Physiology, 185 South Orange Avenue, MSB H626, Newark NJ 07103, USA
| | - Yevgen Yudin
- New Jersey Medical School, UMDNJ, Department of Pharmacology and Physiology, 185 South Orange Avenue, MSB H626, Newark NJ 07103, USA
| | - Yann Bikard
- New Jersey Medical School, UMDNJ, Department of Pharmacology and Physiology, 185 South Orange Avenue, MSB H626, Newark NJ 07103, USA
| | - Wei Chen
- New Jersey Medical School Cancer Center - UMDNJ, Center for Advanced Proteomics Research, Building F1105, 205 South Orange Avenue, Newark, NJ 07103 USA
| | - Tong Liu
- New Jersey Medical School Cancer Center - UMDNJ, Center for Advanced Proteomics Research, Building F1105, 205 South Orange Avenue, Newark, NJ 07103 USA
| | - Hong Li
- New Jersey Medical School Cancer Center - UMDNJ, Center for Advanced Proteomics Research, Building F1105, 205 South Orange Avenue, Newark, NJ 07103 USA
| | - Dieter Jendrossek
- Universität Stuttgart Zentrum für Bioverfahrenstechnik Institut für Mikrobiologie, Allmandring 31, 70569 Stuttgart, Germany
| | - Alejandro Cohen
- Dalhousie University, Proteomics Core Facility, Clinical Research Centre, Room C-304 5849 University Avenue, PO Box 15000, Halifax, NS, B3H 4R2 Canada
| | - Evgeny Pavlov
- Dalhousie University, Department of Physiology and Biophysics Faculty of Medicine, Sir Charles Tupper Medical Building, Halifax, Room 5G, 5850 College St., Halifax, NS, B3H 4R2 Canada
| | - Tibor Rohacs
- New Jersey Medical School, UMDNJ, Department of Pharmacology and Physiology, 185 South Orange Avenue, MSB H626, Newark NJ 07103, USA
| | - Eleonora Zakharian
- New Jersey Medical School, UMDNJ, Department of Pharmacology and Physiology, 185 South Orange Avenue, MSB H626, Newark NJ 07103, USA
- University of Illinois College of Medicine, Department of Cancer Biology and Pharmacology, 1 Illini Drive, Peoria, IL 61605, USA
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37
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Surface expression and channel function of TRPM8 are cooperatively controlled by transmembrane segments S3 and S4. Pflugers Arch 2013; 465:1599-610. [PMID: 23708837 DOI: 10.1007/s00424-013-1302-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2013] [Revised: 05/08/2013] [Accepted: 05/15/2013] [Indexed: 01/04/2023]
Abstract
TRPM8 is a voltage-dependent cation channel additionally gated by cold temperatures, menthol, and icilin. Stimulation by the chemical agonists is at least in part mediated by a conserved sequence motif in transmembrane segment S3. Based on molecular dynamics simulation studies for TRPM8 a gating model was recently developed which predicts a direct electrostatic interaction between S3 and S4. Here, we performed charge reversal mutations to pinpoint possible interactions of the putative S4 voltage sensor with S3. The charge reversals R842D, R842E, and D835R in S4 prevented channel glycosylation and function, indicating a deficient insertion into the plasma membrane. The mutations R842D and R842E were specifically rescued by the reciprocal charge reversal D802R in S3. The alternative charge reversal in S3, D796R, failed to compensate for the dysfunction of the mutants R842D and R842E. Remarkably, the double charge reversal mutants R842D + D802R and R842E + D802R retained intrinsic voltage-sensitivity, although the critical voltage sensor arginine was substituted by a negatively charged residue. Likewise, the insertion of three additional positively charged residues into S4 did not crucially change the voltage-sensitivity of TRPM8 but abolished the sensitivity to icilin. We conclude that S4 does not play a separate role for the gating of TRPM8. Instead, the cooperation with the adjacent segment S3 and the combined charges in these two segments is of general importance for both channel maturation and channel function. This mechanism distinguishes TRPM8 from other voltage-dependent cation channels within and outside the TRP family.
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38
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Abstract
Of somatosensory modalities, cold is one of the more ambiguous percepts, evoking the pleasant sensation of cooling, the stinging bite of cold pain, and welcome relief from chronic pain. Moreover, unlike the precipitous thermal thresholds for heat activation of thermosensitive afferent neurons, thresholds for cold fibers are across a range of cool to cold temperatures that spans over 30 °C. Until recently, how cold produces this myriad of biological effects has been poorly studied, yet new advances in our understanding of cold mechanisms may portend a better understanding of sensory perception as well as provide novel therapeutic approaches. Chief among these was the identification of a number of ion channels that either serve as the initial detectors of cold as a stimulus in the peripheral nervous system, or are part of rather sophisticated differential expression patterns of channels that conduct electrical signals, thereby endowing select neurons with properties that are amenable to electrical signaling in the cold. This review highlights the current understanding of the channels involved in cold transduction as well as presents a hypothetical model to account for the broad range of cold thermal thresholds and distinct functions of cold fibers in perception, pain, and analgesia.
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Affiliation(s)
- David D. McKemy
- Section of Neurobiology,
Department of Biological Sciences, University of Southern California, Los Angeles, California 90089, United States
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TRP channels: diagnostic markers and therapeutic targets for breast cancer? Trends Mol Med 2013; 19:117-24. [DOI: 10.1016/j.molmed.2012.11.004] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2012] [Revised: 09/25/2012] [Accepted: 11/13/2012] [Indexed: 01/22/2023]
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Stimulation of electro-olfactogram responses in the main olfactory epithelia by airflow depends on the type 3 adenylyl cyclase. J Neurosci 2013; 32:15769-78. [PMID: 23136416 DOI: 10.1523/jneurosci.2180-12.2012] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Cilia of olfactory sensory neurons are the primary sensory organelles for olfaction. The detection of odorants by the main olfactory epithelium (MOE) depends on coupling of odorant receptors to the type 3 adenylyl cyclase (AC3) in olfactory cilia. We monitored the effect of airflow on electro-olfactogram (EOG) responses and found that the MOE of mice can sense mechanical forces generated by airflow. The airflow-sensitive EOG response in the MOE was attenuated when cAMP was increased by odorants or by forskolin suggesting a common mechanism for airflow and odorant detection. In addition, the sensitivity to airflow was significantly impaired in the MOE from AC3(-/-) mice. We conclude that AC3 in the MOE is required for detecting the mechanical force of airflow, which in turn may regulate odorant perception during sniffing.
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Orio P, Parra A, Madrid R, González O, Belmonte C, Viana F. Role of Ih in the firing pattern of mammalian cold thermoreceptor endings. J Neurophysiol 2012; 108:3009-23. [DOI: 10.1152/jn.01033.2011] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Mammalian peripheral cold thermoreceptors respond to cooling of their sensory endings with an increase in firing rate and modification of their discharge pattern. We recently showed that cultured trigeminal cold-sensitive (CS) neurons express a prominent hyperpolarization-activated current ( Ih), mainly carried by HCN1 channels, supporting subthreshold resonance in the soma without participating in the response to acute cooling. However, peripheral pharmacological blockade of Ih, or characterization of HCN1−/− mice, reveals a deficit in acute cold detection. Here we investigated the role of Ih in CS nerve endings, where cold sensory transduction actually takes place. Corneal CS nerve endings in mice show a rhythmic spiking activity at neutral skin temperature that switches to bursting mode when the temperature is lowered. Ih blockers ZD7288 and ivabradine alter firing patterns of CS nerve endings, lengthening interspike intervals and inducing bursts at neutral skin temperature. We characterized the CS nerve endings from HCN1−/− mouse corneas and found that they behave similar to wild type, although with a lower slope in the firing frequency vs. temperature relationship, thus explaining the deficit in cold perception of HCN1−/− mice. The firing pattern of nerve endings from HCN1−/− mice was also affected by ZD7288, which we attribute to the presence of HCN2 channels in the place of HCN1. Mathematical modeling shows that the firing phenotype of CS nerve endings from HCN1−/− mice can be reproduced by replacing HCN1 channels with the slower HCN2 channels rather than by abolishing Ih. We propose that Ih carried by HCN1 channels helps tune the frequency of the oscillation and the length of bursts underlying regular spiking in cold thermoreceptors, having important implications for neural coding of cold sensation.
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Affiliation(s)
- Patricio Orio
- Centro Interdisciplinario de Neurociencia de Valparaíso (CINV) and Facultad de Ciencias, Universidad de Valparaíso, Valparaíso, Chile
| | - Andrés Parra
- Instituto de Neurociencias de Alicante, Universidad Miguel Hernández-CSIC, Alicante, Spain
| | - Rodolfo Madrid
- Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile; and
| | - Omar González
- Instituto de Neurociencias de Alicante, Universidad Miguel Hernández-CSIC, Alicante, Spain
- Fundación de Investigación Oftalmológica, Instituto Fernandez-Vega, Oviedo, Spain
| | - Carlos Belmonte
- Instituto de Neurociencias de Alicante, Universidad Miguel Hernández-CSIC, Alicante, Spain
| | - Félix Viana
- Instituto de Neurociencias de Alicante, Universidad Miguel Hernández-CSIC, Alicante, Spain
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Bharate SS, Bharate SB. Modulation of thermoreceptor TRPM8 by cooling compounds. ACS Chem Neurosci 2012; 3:248-67. [PMID: 22860192 PMCID: PMC3369806 DOI: 10.1021/cn300006u] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2012] [Accepted: 02/13/2012] [Indexed: 02/06/2023] Open
Abstract
ThermoTRPs, a subset of the Transient Receptor Potential (TRP) family of cation channels, have been implicated in sensing temperature. TRPM8 and TRPA1 are both activated by cooling. TRPM8 is activated by innocuous cooling (<30 °C) and contributes to sensing unpleasant cold stimuli or mediating the effects of cold analgesia and is a receptor for menthol and icilin (mint-derived and synthetic cooling compounds, respectively). TRPA1 (Ankyrin family) is activated by noxious cold (<17 °C), icilin, and a variety of pungent compounds. Extensive amount of medicinal chemistry efforts have been published mainly in the form of patent literature on various classes of cooling compounds by various pharmaceutical companies; however, no prior comprehensive review has been published. When expressed in heterologous expression systems, such as Xenopus oocytes or mammalian cell lines, TRPM8 mediated currents are activated by a number of cooling compounds in addition to menthol and icilin. These include synthetic p-menthane carboxamides along with other class of compounds such as aliphatic/alicyclic alcohols/esters/amides, sulphones/sulphoxides/sulphonamides, heterocyclics, keto-enamines/lactams, and phosphine oxides. In the present review, the medicinal chemistry of various cooling compounds as activators of thermoTRPM8 channel will be discussed according to their chemical classes. The potential of these compounds to emerge as therapeutic agents is also discussed.
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Affiliation(s)
- Sonali S. Bharate
- Department of Pharmaceutics, P.E. Society’s Modern
College of Pharmacy for Ladies, Dehu-Alandi Road, Moshi,
Pune, India
| | - Sandip B. Bharate
- Medicinal
Chemistry Division, Indian Institute of Integrative Medicine
(CSIR), Canal
Road, Jammu-180001, India
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