1
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Ghovanloo MR, Tyagi S, Zhao P, Effraim PR, Dib-Hajj SD, Waxman SG. Sodium currents in naïve mouse dorsal root ganglion neurons: No major differences between sexes. Channels (Austin) 2024; 18:2289256. [PMID: 38055732 PMCID: PMC10761158 DOI: 10.1080/19336950.2023.2289256] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Accepted: 11/23/2023] [Indexed: 12/08/2023] Open
Abstract
Sexual dimorphism has been reported in multiple pre-clinical and clinical studies on pain. Previous investigations have suggested that in at least some states, rodent dorsal root ganglion (DRG) neurons display differential sex-dependent regulation and expression patterns of various proteins involved in the pain pathway. Our goal in this study was to determine whether sexual dimorphism in the biophysical properties of voltage-gated sodium (Nav) currents contributes to these observations in rodents. We recently developed a novel method that enables high-throughput, unbiased, and automated functional analysis of native rodent sensory neurons from naïve WT mice profiled simultaneously under uniform experimental conditions. In our previous study, we performed all experiments in neurons that were obtained from mixed populations of adult males or females, which were combined into single (combined male/female) data sets. Here, we have re-analyzed the same previously published data and segregated the cells based on sex. Although the number of cells in our previously published data sets were uneven for some comparisons, our results do not show sex-dependent differences in the biophysical properties of Nav currents in these native DRG neurons.
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Affiliation(s)
- Mohammad-Reza Ghovanloo
- Department of Neurology, Yale University School of Medicine, New Haven, CT, USA
- Center for Neuroscience & Regeneration Research, Yale University, West Haven, CT, USA
- Neuro-Rehabilitation Research Center, Veterans Affairs Connecticut Healthcare System, West Haven, CT, USA
| | - Sidharth Tyagi
- Department of Neurology, Yale University School of Medicine, New Haven, CT, USA
- Center for Neuroscience & Regeneration Research, Yale University, West Haven, CT, USA
- Neuro-Rehabilitation Research Center, Veterans Affairs Connecticut Healthcare System, West Haven, CT, USA
- Medical Scientist Training Program, Yale University School of Medicine, New Haven, CT, USA
| | - Peng Zhao
- Department of Neurology, Yale University School of Medicine, New Haven, CT, USA
- Center for Neuroscience & Regeneration Research, Yale University, West Haven, CT, USA
- Neuro-Rehabilitation Research Center, Veterans Affairs Connecticut Healthcare System, West Haven, CT, USA
| | - Philip R. Effraim
- Center for Neuroscience & Regeneration Research, Yale University, West Haven, CT, USA
- Neuro-Rehabilitation Research Center, Veterans Affairs Connecticut Healthcare System, West Haven, CT, USA
- Department of Anesthesiology, Yale University School of Medicine, New Haven, CT, USA
| | - Sulayman D. Dib-Hajj
- Department of Neurology, Yale University School of Medicine, New Haven, CT, USA
- Center for Neuroscience & Regeneration Research, Yale University, West Haven, CT, USA
- Neuro-Rehabilitation Research Center, Veterans Affairs Connecticut Healthcare System, West Haven, CT, USA
| | - Stephen G. Waxman
- Department of Neurology, Yale University School of Medicine, New Haven, CT, USA
- Center for Neuroscience & Regeneration Research, Yale University, West Haven, CT, USA
- Neuro-Rehabilitation Research Center, Veterans Affairs Connecticut Healthcare System, West Haven, CT, USA
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2
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Xie MX, Rao JH, Tian XY, Liu JK, Li X, Chen ZY, Cao Y, Chen AN, Shu HH, Zhang XL. ATF4 inhibits TRPV4 function and controls itch perception in rodents and nonhuman primates. Pain 2024; 165:1840-1859. [PMID: 38422489 DOI: 10.1097/j.pain.0000000000003189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Accepted: 01/03/2024] [Indexed: 03/02/2024]
Abstract
ABSTRACT Acute and chronic itch are prevalent and incapacitating, yet the neural mechanisms underlying both acute and chronic itch are just starting to be unraveled. Activated transcription factor 4 (ATF4) belongs to the ATF/CREB transcription factor family and primarily participates in the regulation of gene transcription. Our previous study has demonstrated that ATF4 is expressed in sensory neurons. Nevertheless, the role of ATF4 in itch sensation remains poorly understood. Here, we demonstrate that ATF4 plays a significant role in regulating itch sensation. The absence of ATF4 in dorsal root ganglion (DRG) neurons enhances the itch sensitivity of mice. Overexpression of ATF4 in sensory neurons significantly alleviates the acute and chronic pruritus in mice. Furthermore, ATF4 interacts with the transient receptor potential cation channel subfamily V member 4 (TRPV4) and inhibits its function without altering the expression or membrane trafficking of TRPV4 in sensory neurons. In addition, interference with ATF4 increases the itch sensitivity in nonhuman primates and enhances TRPV4 currents in nonhuman primates DRG neurons; ATF4 and TRPV4 also co-expresses in human sensory neurons. Our data demonstrate that ATF4 controls pruritus by regulating TRPV4 signaling through a nontranscriptional mechanism and identifies a potential new strategy for the treatment of pathological pruritus.
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Affiliation(s)
- Man-Xiu Xie
- Department of Anesthesiology, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Guangdong Provincial Clinical Research Center for Cancer, Guangzhou, China
| | - Jun-Hua Rao
- Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Guangdong Public Laboratory of Wild Animal Conservation and Utilization, Institute of Zoology, Guangdong Academy of Sciences, Guangzhou, China
| | - Xiao-Yu Tian
- Medical Research Institute, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, China
| | - Jin-Kun Liu
- Medical Research Institute, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, China
- Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Guangzhou, China
| | - Xiao Li
- College of Food Science and Technology, Hainan University, Haikou, China
| | - Zi-Yi Chen
- Zhongshan School of Medicine of Sun Yat-sen University, Guangzhou, China
| | - Yan Cao
- College of Food Science and Technology, Hainan University, Haikou, China
| | - An-Nan Chen
- Zhongshan School of Medicine of Sun Yat-sen University, Guangzhou, China
| | - Hai-Hua Shu
- Department of Anesthesiology, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, China
| | - Xiao-Long Zhang
- Medical Research Institute, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, China
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3
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Koivisto AP, Voets T, Iadarola MJ, Szallasi A. Targeting TRP channels for pain relief: A review of current evidence from bench to bedside. Curr Opin Pharmacol 2024; 75:102447. [PMID: 38471384 DOI: 10.1016/j.coph.2024.102447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Revised: 02/06/2024] [Accepted: 02/19/2024] [Indexed: 03/14/2024]
Abstract
Several decades of research support the involvement of transient receptor potential (TRP) channels in nociception. Despite the disappointments of early TRPV1 antagonist programs, the TRP family remains a promising therapeutic target in pain disorders. High-dose capsaicin patches are already in clinical use to relieve neuropathic pain. At present, localized injections of the side-directed TRPV1 agonist capsaicin and resiniferatoxin are undergoing clinical trials in patients with osteoarthritis and bone cancer pain. TRPA1, TRPM3, and TRPC5 channels are also of significant interest. This review discusses the role of TRP channels in human pain conditions.
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Affiliation(s)
| | - Thomas Voets
- Laboratory of Ion Channel Research, VIB-KU Leuven Center for Brain and Disease Research & KU Leuven Department of Cellular and Molecular Medicine, Leuven, Belgium
| | - Michael J Iadarola
- Department of Perioperative Medicine, Clinical Center, National Institutes of Health, Bethesda, MD, USA
| | - Arpad Szallasi
- Department of Pathology and Experimental Cancer Research, Semmelweis University, Budapest, Hungary.
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4
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Yazğan B, Yazğan Y, Nazıroğlu M. Alpha-lipoic acid modulates the diabetes mellitus-mediated neuropathic pain via inhibition of the TRPV1 channel, apoptosis, and oxidative stress in rats. J Bioenerg Biomembr 2023:10.1007/s10863-023-09971-w. [PMID: 37357235 DOI: 10.1007/s10863-023-09971-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Accepted: 06/16/2023] [Indexed: 06/27/2023]
Abstract
Diabetes mellitus (DM) is a chronic syndrome involving neuropathic pain. Increased oxidative stress in DM is assumed to increase free reactive oxygen radicals (ROS) and causes diabetic damage. The sciatic nerve (ScN) and dorsal root ganglion (DRG) both contain high levels of the TRPV1 channel, which is triggered by capsaicin and ROSs and results in increased Ca2+ entry into the neurons. Alpha-lipoic acid (ALA) is considered an important part of the antioxidant system. To better characterize the protective effects of ALA on the DM-induced neuronal through TRPV1 modulation, we investigated the role of ALA on DM-induced neuropathic pain, oxidative ScN, and DRG damage in diabetic rats. Forty adult Wistar albino female rats were divided into four groups as control, ALA (50 mg/kg for 14 days), streptozotocin (STZ and 45 mg/kg and single dose), and STZ + ALA. Rats were used for the pain tests. After obtaining the DRGs and ScN, they were used for plate reader, patch-clamp, and laser confocal microscope analyses. We observed the modulator role of ALA on the thresholds of mechanical withdrawal pain (von Frey test) and hot sensitivity pain (hot plate test) in the STZ + ALA group. The treatment of ALA decreased STZ-induced increase of TRPV1 current densities, intracellular free Ca2+ concentrations (Fura-2 and Fluo - 3/AM), ROS, caspase 3, caspase 9, mitochondrial membrane potential, and apoptosis values in the ScN and DRG neurons, although its treatment induced the increase of cell viability and body weight gain. The treatment of ALA acted a neuroprotective role on the TRPV1 channel stimulation-mediated Ca2+ influx, neuropathic pain, and neuronal damage in diabetic rats. The neuroprotective role of ALA treatment can be explained by its modulating the TRPV1 channel activity, intracellular Ca2+ increase-induced oxidative stress, and apoptosis.
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Affiliation(s)
- Betül Yazğan
- Department of Physiology, Medical Faculty, Kastamonu University, Kastamonu, Türkiye, Turkey
| | - Yener Yazğan
- Department of Biophysics, Medical Faculty, Kastamonu University, Kastamonu, Türkiye, Turkey
| | - Mustafa Nazıroğlu
- Neuroscience Research Center, Suleyman Demirel University, Isparta, Türkiye, Turkey.
- Department of Neuroscience, Health Science Institute, Suleyman Demirel University, Isparta, Türkiye, Turkey.
- Departments of Biophysics and Neuroscience, Faculty of Medicine, Suleyman Demirel University, Isparta, Türkiye, Turkey.
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5
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He W, Liang L, Zhang Y. Pungency Perception and the Interaction with Basic Taste Sensations: An Overview. Foods 2023; 12:2317. [PMID: 37372528 DOI: 10.3390/foods12122317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 05/17/2023] [Accepted: 06/07/2023] [Indexed: 06/29/2023] Open
Abstract
The perception of pungency can be attributed to the combination of pain and heat, and it has critical impacts on food flavor and food consumption preferences. Many studies have reported a variety of pungent ingredients with different Scoville heat units (SHU), and the mechanism of pungent perception was revealed in vivo and in vitro. The worldwide use of spices containing pungent ingredients has led to an increasing awareness of their effects on basic tastes. However, the interaction between basic tastes and pungency perception based on structure-activity relationship, taste perception mechanism and neurotransmission lacks review and summary, considering its brighter prospects in food flavor. Thus, in this review, common pungency substances and pungency evaluation methods, and the mechanism of pungency perception is presented, and the interaction between basic tastes and pungency perception and the possible factors of their interaction are reviewed in detail. Pungent stimuli are mainly transduced through transient receptor potential vanilloid 1 (TRPV1) and transient receptor potential fixed hormone isoform (TRPA1) activated by stimulants. Using modern detection techniques combined with sensory standards, different substances produce different degrees of pungent stimulation, ranging from 104 to 107 SHU/g. Pungent stimuli can affect taste receptor or channel protein conformation and regulate taste bud cell sensitivity by producing neurotransmission products. The products of neurotransmission and taste receptor cell activation in turn act on taste perception. When there are simultaneous effects of taste perception, pungency stimulation may enhance the perception of salty at a certain concentration, with a mutual inhibition effect with sour, sweet, and bitter taste, while its interaction with umami taste is not obvious. However, due to the complexity of perception and the uncertainty of many perceptual receptors or channels, the current studies of interactions are still controversial. Based on the understanding of the mechanism and influencing factors, the availability of pungency substances is proposed in the perspective of food industry in order to achieve new development.
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Affiliation(s)
- Wei He
- Food Laboratory of Zhongyuan, Beijing Technology and Business University, Beijing 100048, China
- Key Laboratory of Flavor Science of China General Chamber of Commerce, Beijing Technology and Business University, Beijing 100048, China
| | - Li Liang
- Food Laboratory of Zhongyuan, Beijing Technology and Business University, Beijing 100048, China
- Key Laboratory of Flavor Science of China General Chamber of Commerce, Beijing Technology and Business University, Beijing 100048, China
| | - Yuyu Zhang
- Food Laboratory of Zhongyuan, Beijing Technology and Business University, Beijing 100048, China
- Key Laboratory of Flavor Science of China General Chamber of Commerce, Beijing Technology and Business University, Beijing 100048, China
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6
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Suttle A, Wang P, Dias FC, Zhang Q, Luo Y, Simmons L, Bortsov A, Tchivileva IE, Nackley AG, Chen Y. Sensory Neuron-TRPV4 Modulates Temporomandibular Disorder Pain Via CGRP in Mice. THE JOURNAL OF PAIN 2023; 24:782-795. [PMID: 36509176 PMCID: PMC10164682 DOI: 10.1016/j.jpain.2022.12.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2022] [Revised: 11/25/2022] [Accepted: 12/01/2022] [Indexed: 12/14/2022]
Abstract
Temporomandibular disorder (TMD) pain that involves inflammation and injury in the temporomandibular joint (TMJ) and/or masticatory muscle is the most common form of orofacial pain. We recently found that transient receptor potential vanilloid-4 (TRPV4) in trigeminal ganglion (TG) neurons is upregulated after TMJ inflammation, and TRPV4 coexpresses with calcitonin gene-related peptide (CGRP) in TMJ-innervating TG neurons. Here, we extended these findings to determine the specific contribution of TRPV4 in TG neurons to TMD pain, and examine whether sensory neuron-TRPV4 modulates TMD pain via CGRP. In mouse models of TMJ inflammation or masseter muscle injury, sensory neuron-Trpv4 conditional knockout (cKO) mice displayed reduced pain. Coexpression of TRPV4 and CGRP in TMJ- or masseter muscle-innervating TG neurons was increased after TMJ inflammation and masseter muscle injury, respectively. Activation of TRPV4-expressing TG neurons triggered secretion of CGRP, which was associated with increased levels of CGRP in peri-TMJ tissues, masseter muscle, spinal trigeminal nucleus, and plasma in both models. Local injection of CGRP into the TMJ or masseter muscle evoked acute pain in naïve mice, while blockade of CGRP receptor attenuated pain in mouse models of TMD. These results suggest that TRPV4 in TG neurons contributes to TMD pain by potentiating CGRP secretion. PERSPECTIVE: This study demonstrates that activation of TRPV4 in TG sensory neurons drives pain by potentiating the release of pain mediator CGRP in mouse models of TMJ inflammation and masseter muscle injury. Targeting TRPV4 and CGRP may be of clinical potential in alleviating TMD pain.
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Affiliation(s)
- Abbie Suttle
- Department of Neurology, Duke University, Durham, North Carolina
| | - Peng Wang
- Department of Neurology, Duke University, Durham, North Carolina
| | - Fabiana C Dias
- Department of Neurology, Duke University, Durham, North Carolina
| | - Qiaojuan Zhang
- Department of Neurology, Duke University, Durham, North Carolina
| | - Yuhui Luo
- Department of Neurology, Duke University, Durham, North Carolina
| | - Lauren Simmons
- Department of Neurology, Duke University, Durham, North Carolina
| | - Andrey Bortsov
- Department of Endodontics, Center for Translational Pain Medicine, Department of Anesthesiology, Duke University, Durham, North Carolina
| | - Inna E Tchivileva
- Center for Pain Research and Innovation, Adams School of Dentistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Andrea G Nackley
- Department of Endodontics, Center for Translational Pain Medicine, Department of Anesthesiology, Duke University, Durham, North Carolina; Department of Pharmacology and Cancer Biology, Duke University, Durham, North Carolina
| | - Yong Chen
- Department of Neurology, Duke University, Durham, North Carolina; Department of Endodontics, Center for Translational Pain Medicine, Department of Anesthesiology, Duke University, Durham, North Carolina; Department of Pathology, Duke University, Durham, North Carolina.
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7
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Aydın B, Nazıroğlu M. Involvement of TRPM7 Channel on the Induction of Diabetic Neuropathic Pain in Mice: Protective Role of Selenium and Curcumin. Biol Trace Elem Res 2023; 201:2377-2395. [PMID: 36567422 DOI: 10.1007/s12011-022-03518-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Accepted: 12/05/2022] [Indexed: 12/26/2022]
Abstract
Excessive levels of the mitochondrial reactive oxygen radical (mitSOX) and Ca2+ influx were found to cause neuropathic pain in patients with diabetes mellitus (DM). Naltriben (NLT) and mitSOX activate the transient receptor (TRP) melastatin 7 (TRPM7) channel, but antioxidants and carvacrol inhibit it. Selenium (Se) and curcumin (CRC) have been thoroughly studied for their modulator effects on streptozotocin (STZ)-induced neuropathic pain, apoptosis, and oxidative stress through the blockage of TRP channels in dorsal root ganglion (DRG) neurons. It has not yet been fully understood how Se and CRC protect against STZ-induced neuropathic pain by modulating TRPM7. Here, we assessed how Se and CRC affected the Ca2+ influx, mitSOX-mediated oxidative damage, and apoptosis in the DRGs of mice through modifying TRPM7 activity. Seven groups (control, Se, CRC, STZ, STZ + Se, STZ + CRC, and STZ + Se + CRC) were induced from the 56 male mice. We observed that the STZ-induced stimulation of TRPM7 increased mechanical neuropathic pain (von Frey), thermal neuropathic pain (hot plate), cytosolic Ca2+, TRPM7 current density, TRPM7 expression, lipid peroxidation, mitSOX, cytosolic ROS, apoptosis, caspase-3, caspase-8, and caspase-9 concentrations, whereas Se and CRC therapies diminished the alterations. The STZ-mediated decreases of DRG viability, brain glutathione, glutathione peroxidase, vitamin A, and vitamin E concentrations were also upregulated in the treatment groups by the therapies. These findings collectively imply that an imbalance of neuropathic pain, oxidative neurotoxicity, and apoptosis in the mice is caused by the STZ-mediated activation of TRPM7. However, the downregulation of TRPM7 activity caused by the injections of Se and CRC reduced the neurotoxicity and apoptosis.
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Affiliation(s)
- Bünyamin Aydın
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Faculty of Medicine, Kutahya Health Sciences University, Kutahya Evliya Çelebi Training and Research Hospital, TR-64100, Kutahya, Turkey
| | - Mustafa Nazıroğlu
- Neuroscience Research Center (NOROBAM), Suleyman Demirel University, TR-32260, Isparta, Turkey.
- Drug Discovery Unit, Analyses, Innov, BSN Health, Org., Agricul., Ltd, Consult, TR-32260, Isparta, Turkey.
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8
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Mao XL, Chen YX, Yu H, Yang QW. Inhibition of acid sensing ion channels by eugenol in rat trigeminal ganglion neurons. Neurosci Lett 2023; 803:137192. [PMID: 36924928 DOI: 10.1016/j.neulet.2023.137192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Revised: 03/10/2023] [Accepted: 03/11/2023] [Indexed: 03/17/2023]
Abstract
Eugenol is widely used as an analgesic in the dental treatment. The underlying mechanisms may involve its modulation of various ion channels. Acid-sensing ion channels (ASICs) are pH sensors and expressed in trigeminal ganglion (TG) neurons. In the present study, we found that eugenol concentration-dependently inhibited ASIC currents in TG neurons with an IC50 of 98.8 ± 7.4 μM. Eugenol decreased the maximum response to acidic pH and did not alter pH0.5 in the concentration-response curve of acidic pH, suggesting a noncompetitive inhibition of ASICs by eugenol. G-proteins were not involved in eugenol-induced inhibition, since pre-application of eugenol also decreased ASIC currents in the presence of the G-protein blocker GDP-β-S. In addition, eugenol also partly inhibited ASIC3 currents in Chinese hamster ovary cells transfected with ASIC3. In conclusion, eugenol partly inhibited ASIC currents in TG neurons in a concentration-dependent, non-competitive and G-protein independent manner. These results suggested that the ASICs could be a molecular target for eugenol in TG neurons, which contributed to its analgesic effect.
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Affiliation(s)
- Xiao-Li Mao
- Department of Pharmacy, Wuhan First Hospital, Wuhan, China.
| | - Yi-Xuan Chen
- Department of Pharmacy, Wuhan First Hospital, Wuhan, China
| | - Huan Yu
- Department of Pharmacy, Wuhan First Hospital, Wuhan, China
| | - Quan-Wei Yang
- Department of Pharmacy, Wuhan First Hospital, Wuhan, China.
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9
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Ahn J, Ohk K, Won J, Choi DH, Jung YH, Yang JH, Jun Y, Kim JA, Chung S, Lee SH. Modeling of three-dimensional innervated epidermal like-layer in a microfluidic chip-based coculture system. Nat Commun 2023; 14:1488. [PMID: 36932093 PMCID: PMC10023681 DOI: 10.1038/s41467-023-37187-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Accepted: 03/07/2023] [Indexed: 03/19/2023] Open
Abstract
Reconstruction of skin equivalents with physiologically relevant cellular and matrix architecture is indispensable for basic research and industrial applications. As skin-nerve crosstalk is increasingly recognized as a major element of skin physiological pathology, the development of reliable in vitro models to evaluate the selective communication between epidermal keratinocytes and sensory neurons is being demanded. In this study, we present a three-dimensional innervated epidermal keratinocyte layer as a sensory neuron-epidermal keratinocyte co-culture model on a microfluidic chip using the slope-based air-liquid interfacing culture and spatial compartmentalization. Our co-culture model recapitulates a more organized basal-suprabasal stratification, enhanced barrier function, and physiologically relevant anatomical innervation and demonstrated the feasibility of in situ imaging and functional analysis in a cell-type-specific manner, thereby improving the structural and functional limitations of previous coculture models. This system has the potential as an improved surrogate model and platform for biomedical and pharmaceutical research.
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Affiliation(s)
- Jinchul Ahn
- School of Mechanical Engineering, Korea University, Seoul, 02841, South Korea
- Next&Bio Inc., Seoul, 02841, South Korea
| | - Kyungeun Ohk
- R&D center, Humedix, Co., Ltd., Seongnam, 13201, South Korea
- Department of Bio-convergence Engineering, Korea University, Seoul, 02841, South Korea
| | - Jihee Won
- School of Mechanical Engineering, Korea University, Seoul, 02841, South Korea
- Next&Bio Inc., Seoul, 02841, South Korea
| | - Dong-Hee Choi
- School of Mechanical Engineering, Korea University, Seoul, 02841, South Korea
- Next&Bio Inc., Seoul, 02841, South Korea
| | - Yong Hun Jung
- School of Mechanical Engineering, Korea University, Seoul, 02841, South Korea
- Next&Bio Inc., Seoul, 02841, South Korea
| | | | - Yesl Jun
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, 02841, South Korea
- Drug Discovery Platform Research Center, Therapeutics and Biotechnology Division, Korea Research Institute of Chemical Technology, Daejeon, 34114, South Korea
| | - Jin-A Kim
- School of Mechanical Engineering, Korea University, Seoul, 02841, South Korea.
| | - Seok Chung
- School of Mechanical Engineering, Korea University, Seoul, 02841, South Korea.
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, 02841, South Korea.
- Center for Brain Technology, Brain Science Institute, Korea Institute of Science and Technology (KIST), Seoul, 02792, South Korea.
| | - Sang-Hoon Lee
- Department of Bio-convergence Engineering, Korea University, Seoul, 02841, South Korea
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, 02841, South Korea
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10
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Ghovanloo MR, Tyagi S, Zhao P, Kiziltug E, Estacion M, Dib-Hajj SD, Waxman SG. High-throughput combined voltage-clamp/current-clamp analysis of freshly isolated neurons. CELL REPORTS METHODS 2023; 3:100385. [PMID: 36814833 PMCID: PMC9939380 DOI: 10.1016/j.crmeth.2022.100385] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 11/11/2022] [Accepted: 12/15/2022] [Indexed: 01/15/2023]
Abstract
The patch-clamp technique is the gold-standard methodology for analysis of excitable cells. However, throughput of manual patch-clamp is slow, and high-throughput robotic patch-clamp, while helpful for applications like drug screening, has been primarily used to study channels and receptors expressed in heterologous systems. We introduce an approach for automated high-throughput patch-clamping that enhances analysis of excitable cells at the channel and cellular levels. This involves dissociating and isolating neurons from intact tissues and patch-clamping using a robotic instrument, followed by using an open-source Python script for analysis and filtration. As a proof of concept, we apply this approach to investigate the biophysical properties of voltage-gated sodium (Nav) channels in dorsal root ganglion (DRG) neurons, which are among the most diverse and complex neuronal cells. Our approach enables voltage- and current-clamp recordings in the same cell, allowing unbiased, fast, simultaneous, and head-to-head electrophysiological recordings from a wide range of freshly isolated neurons without requiring culturing on coverslips.
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Affiliation(s)
- Mohammad-Reza Ghovanloo
- Department of Neurology, Yale University School of Medicine, New Haven, CT, USA
- Center for Neuroscience & Regeneration Research, Yale University, West Haven, CT, USA
- Neuro-Rehabilitation Research Center, Veterans Affairs Connecticut Healthcare System, West Haven, CT, USA
| | - Sidharth Tyagi
- Department of Neurology, Yale University School of Medicine, New Haven, CT, USA
- Center for Neuroscience & Regeneration Research, Yale University, West Haven, CT, USA
- Neuro-Rehabilitation Research Center, Veterans Affairs Connecticut Healthcare System, West Haven, CT, USA
- Medical Scientist Training Program, Yale University School of Medicine, New Haven, CT, USA
| | - Peng Zhao
- Department of Neurology, Yale University School of Medicine, New Haven, CT, USA
- Center for Neuroscience & Regeneration Research, Yale University, West Haven, CT, USA
- Neuro-Rehabilitation Research Center, Veterans Affairs Connecticut Healthcare System, West Haven, CT, USA
| | - Emre Kiziltug
- Department of Neurology, Yale University School of Medicine, New Haven, CT, USA
| | - Mark Estacion
- Department of Neurology, Yale University School of Medicine, New Haven, CT, USA
- Center for Neuroscience & Regeneration Research, Yale University, West Haven, CT, USA
- Neuro-Rehabilitation Research Center, Veterans Affairs Connecticut Healthcare System, West Haven, CT, USA
| | - Sulayman D. Dib-Hajj
- Department of Neurology, Yale University School of Medicine, New Haven, CT, USA
- Center for Neuroscience & Regeneration Research, Yale University, West Haven, CT, USA
- Neuro-Rehabilitation Research Center, Veterans Affairs Connecticut Healthcare System, West Haven, CT, USA
| | - Stephen G. Waxman
- Department of Neurology, Yale University School of Medicine, New Haven, CT, USA
- Center for Neuroscience & Regeneration Research, Yale University, West Haven, CT, USA
- Neuro-Rehabilitation Research Center, Veterans Affairs Connecticut Healthcare System, West Haven, CT, USA
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11
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Rs11726196 Single-Nucleotide Polymorphism of the Transient Receptor Potential Canonical 3 ( TRPC3) Gene Is Associated with Chronic Pain. Int J Mol Sci 2023; 24:ijms24021028. [PMID: 36674543 PMCID: PMC9867099 DOI: 10.3390/ijms24021028] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 12/15/2022] [Accepted: 12/30/2022] [Indexed: 01/06/2023] Open
Abstract
Chronic pain is reportedly associated with the transient receptor potential canonical 3 (TRPC3) gene. The present study examined the genetic associations between the single-nucleotide polymorphisms (SNPs) of the TRPC3 gene and chronic pain. The genomic samples from 194 patients underwent linkage disequilibrium (LD) analyses of 29 SNPs within and around the vicinity of the TRPC3 gene. We examined the associations between the SNPs and the susceptibility to chronic pain by comparing the genotype distribution of 194 patients with 282 control subjects. All SNP genotype data were extracted from our previous whole-genome genotyping results. Twenty-nine SNPs were extracted, and a total of four LD blocks with 15 tag SNPs were observed within and around the TRPC3 gene. We further analyzed the associations between these tag SNPs and chronic pain. The rs11726196 SNP genotype distribution of patients was significantly different from the control subjects even after multiple-testing correction with the number of SNPs. The TT + TG genotype of rs11726196 is often carried by chronic pain patients, suggesting a causal role for the T allele. These results contribute to our understanding of the genetic risk factors for chronic pain.
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12
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Zhao C, MacKinnon R. Structural and functional analyses of a GPCR-inhibited ion channel TRPM3. Neuron 2023; 111:81-91.e7. [PMID: 36283409 DOI: 10.1016/j.neuron.2022.10.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Revised: 09/03/2022] [Accepted: 09/29/2022] [Indexed: 12/24/2022]
Abstract
G-protein coupled receptors (GPCRs) govern the physiological response to stimuli by modulating the activity of downstream effectors, including ion channels. TRPM3 is an ion channel inhibited by GPCRs through direct interaction with G protein (Gβγ) released upon their activation. This GPCR-TRPM3 signaling pathway contributes to the analgesic effect of morphine. Here, we characterized Gβγ inhibition of TRPM3 using electrophysiology and single particle cryo-electron microscopy (cryo-EM). From electrophysiology, we obtained a half inhibition constant (IC50) of ∼240 nM. Using cryo-EM, we determined structures of mouse TRPM3 expressed in human cells with and without Gβγ and with and without PIP2, a lipid required for TRPM3 activity, at resolutions of 2.7-4.7 Å. Gβγ-TRPM3 interfaces vary depending on PIP2 occupancy; however, in all cases, Gβγ appears loosely attached to TRPM3. The IC50 in electrophysiology experiments raises the possibility that additional unknown factors may stabilize the TRPM3-Gβγ complex.
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Affiliation(s)
- Chen Zhao
- Laboratory of Molecular Neurobiology and Biophysics, Howard Hughes Medical Institute, the Rockefeller University, New York, NY 10065, United States
| | - Roderick MacKinnon
- Laboratory of Molecular Neurobiology and Biophysics, Howard Hughes Medical Institute, the Rockefeller University, New York, NY 10065, United States.
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13
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Localization of TRP Channels in Healthy Oral Mucosa from Human Donors. eNeuro 2022; 9:ENEURO.0328-21.2022. [PMID: 36635242 PMCID: PMC9797210 DOI: 10.1523/eneuro.0328-21.2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 11/28/2022] [Accepted: 12/01/2022] [Indexed: 12/12/2022] Open
Abstract
The oral cavity is exposed to a remarkable range of noxious and innocuous conditions, including temperature fluctuations, mechanical forces, inflammation, and environmental and endogenous chemicals. How such changes in the oral environment are sensed is not completely understood. Transient receptor potential (TRP) ion channels are a diverse family of molecular receptors that are activated by chemicals, temperature changes, and tissue damage. In non-neuronal cells, TRP channels play roles in inflammation, tissue development, and maintenance. In somatosensory neurons, TRP channels mediate nociception, thermosensation, and chemosensation. To assess whether TRP channels might be involved in environmental sensing in the human oral cavity, we investigated their distribution in human tongue and hard palate biopsies. TRPV3 and TRPV4 were expressed in epithelial cells with inverse expression patterns where they likely contribute to epithelial development and integrity. TRPA1 immunoreactivity was present in fibroblasts, immune cells, and neuronal afferents, consistent with known roles of TRPA1 in sensory transduction and response to damage and inflammation. TRPM8 immunoreactivity was found in lamina propria and neuronal subpopulations including within the end bulbs of Krause, consistent with a role in thermal sensation. TRPV1 immunoreactivity was identified in intraepithelial nerve fibers and end bulbs of Krause, consistent with roles in nociception and thermosensation. TRPM8 and TRPV1 immunoreactivity in end bulbs of Krause suggest that these structures contain a variety of neuronal afferents, including those that mediate nociception, thermosensation, and mechanotransduction. Collectively, these studies support the role of TRP channels in oral environmental surveillance and response.
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14
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Gualdani R, Gailly P, Yuan JH, Yerna X, Di Stefano G, Truini A, Cruccu G, Dib-Hajj SD, Waxman SG. A TRPM7 mutation linked to familial trigeminal neuralgia: Omega current and hyperexcitability of trigeminal ganglion neurons. Proc Natl Acad Sci U S A 2022; 119:e2119630119. [PMID: 36095216 PMCID: PMC9499596 DOI: 10.1073/pnas.2119630119] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Trigeminal neuralgia (TN) is a unique pain disorder characterized by intense paroxysmal facial pain within areas innervated by the trigeminal nerve. Although most cases of TN are sporadic, familial clusters of TN suggest that genetic factors may contribute to this disorder. Whole-exome sequencing in patients with TN reporting positive family history demonstrated a spectrum of variants of ion channels including TRP channels. Here, we used patch-clamp analysis and Ca2+ and Na+ imaging to assess a rare variant in the TRPM7 channel, p.Ala931Thr, within transmembrane domain 3, identified in a man suffering from unilateral TN. We showed that A931T produced an abnormal inward current carried by Na+ and insensitive to the pore blocker Gd3+. Hypothesizing that replacement of the hydrophobic alanine at position 931 with the more polar threonine destabilizes a hydrophobic ring, near the voltage sensor domain, we performed alanine substitutions of F971 and W972 and obtained results suggesting a role of A931-W972 hydrophobic interaction in S3-S4 hydrophobic cleft stability. Finally, we transfected trigeminal ganglion neurons with A931T channels and observed that expression of this TRPM7 variant lowers current threshold and resting membrane potential, and increases evoked firing activity in TG neurons. Our results support the notion that the TRPM7-A931T mutation located in the S3 segment at the interface with the transmembrane region S4, generates an omega current that carries Na+ influx in physiological conditions. A931T produces hyperexcitability and a sustained Na+ influx in trigeminal ganglion neurons that may underlie pain in this kindred with trigeminal neuralgia.
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Affiliation(s)
- Roberta Gualdani
- aInstitute of Neuroscience, Université catholique de Louvain, B-1200 Brussels, Belgium
| | - Philippe Gailly
- aInstitute of Neuroscience, Université catholique de Louvain, B-1200 Brussels, Belgium
| | - Jun-Hui Yuan
- bDepartment of Neurology, Yale School of Medicine, New Haven, CT 06520
- cCenter for Neuroscience and Regeneration Research, Veterans Affairs Connecticut Healthcare, West Haven, CT 06515
| | - Xavier Yerna
- aInstitute of Neuroscience, Université catholique de Louvain, B-1200 Brussels, Belgium
| | - Giulia Di Stefano
- dDepartment of Human Neuroscience, Sapienza University, 00185 Rome, Italy
| | - Andrea Truini
- dDepartment of Human Neuroscience, Sapienza University, 00185 Rome, Italy
| | - Giorgio Cruccu
- dDepartment of Human Neuroscience, Sapienza University, 00185 Rome, Italy
| | - Sulayman D. Dib-Hajj
- bDepartment of Neurology, Yale School of Medicine, New Haven, CT 06520
- cCenter for Neuroscience and Regeneration Research, Veterans Affairs Connecticut Healthcare, West Haven, CT 06515
| | - Stephen G. Waxman
- bDepartment of Neurology, Yale School of Medicine, New Haven, CT 06520
- cCenter for Neuroscience and Regeneration Research, Veterans Affairs Connecticut Healthcare, West Haven, CT 06515
- 2To whom correspondence may be addressed.
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15
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Yajima T, Sato T, Hosokawa H, Kondo T, Ichikawa H. Transient receptor potential melastatin-7 in the rat dorsal root ganglion. J Chem Neuroanat 2022; 125:102163. [PMID: 36122679 DOI: 10.1016/j.jchemneu.2022.102163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 09/08/2022] [Accepted: 09/15/2022] [Indexed: 11/30/2022]
Abstract
AIMS Transient receptor potential melastatin-7 (TRPM7) is a selective cation permeable channel which plays important roles in cellular and developmental biology such as cell proliferation, survival, differentiation and migration. This channel is also known to be necessary for transmitter release in the peripheral nervous system. In this study, immunohistochemistry for TRPM7 was conducted in the rat lumbar dorsal root ganglion (DRG). METHODS Triple immunofluorescence methods were used to demonstrate distribution of TRPM7 and its relationship to other TRP channels in the DRG. Retrograde tracing and double immunofluorescence methods were also performed to know peripheral targets of DRG neurons containing TRPM7 and TRP vanilloid 1 (TRPV1). In addition, transection of the sciatic nerve was conducted to demonstrate an effect of the nerve injury on TRPM7expression in the DRG. RESULTS TRPM7-immunoreactivity was expressed by 53.9% of sensory neurons in the 4th lumbar DRG. TRPM7-immunoreactive (-IR) DRG neurons mostly had small (<600 µm²) and medium-sized (600-1200 µm²) cell bodies. By triple and double immunofluorescence methods, approximately 70% of TRPM7-IR DRG neurons contained TRPV1-immunoreactivity. Although the number of DRG neurons co-expressing TRPM7 and TRPM8 was small in the DRG, almost all of TRPM8-IR DRG neurons co-expressed TRPM7-immunoreactivity. By combination of retrograde tracing method and immunohistochemistry, TRPM7 was expressed by half of DRG neurons innervating the plantar skin (61.9%) and gastrocnemius muscle (51.2%), and 79.6% of DRG neurons innervating the periosteum. Co-expression of TRPM7 and TRPV1 among periosteum DRG neurons (75.7%) was more abundant than among cutaneous (53.2%) and muscular (40.4%) DRG neurons. DRG neurons which co-expressed these ion channels in the periosteum had smaller cell bodies compared to the skin and muscle. In addition, the sciatic nerve transection decreased the number of TRPM7-IR neurons in the DRG (approximately 60% reduction). The RT-qPCR analysis also demonstrated reduction of TRPM7 mRNA in the injured DRG. CONCLUSION The present study suggests that TRPM7 is mainly located in small nociceptors in the DRG. The content of TRPM7 in DRG neurons is probably different among their peripheral targets. TRPM7 in DRG neurons may be able to respond to noxious stimulation from their peripheral tissues. The nerve injury can decrease the level of TRPM7 mRNA and protein in DRG neurons.
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Affiliation(s)
- Takehiro Yajima
- Division of Oral and Craniofacial Anatomy, Graduate School of Dentistry, Tohoku University, Sendai 980-8575, Japan
| | - Tadasu Sato
- Division of Oral and Craniofacial Anatomy, Graduate School of Dentistry, Tohoku University, Sendai 980-8575, Japan.
| | - Hiroshi Hosokawa
- Department of Intelligence Science and Technology, Graduate School of Informatics, Kyoto University, Kyoto 606-8501, Japan
| | - Teruyoshi Kondo
- Department of Animal Pharmaceutical Sciences, School of Pharmaceutical Sciences, Kyushu University of Health and Welfare, Nobeoka 882-8508, Japan
| | - Hiroyuki Ichikawa
- Division of Oral and Craniofacial Anatomy, Graduate School of Dentistry, Tohoku University, Sendai 980-8575, Japan
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Mhalhel K, Montalbano G, Giurdanella G, Abbate F, Laurà R, Guerrera MC, Germanà A, Levanti M. Histological and immunohistochemical study of gilthead seabream tongue from the early stage of development: TRPV4 potential roles. Ann Anat 2022; 244:151985. [PMID: 35914630 DOI: 10.1016/j.aanat.2022.151985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 05/31/2022] [Accepted: 07/14/2022] [Indexed: 10/16/2022]
Abstract
BACKGROUND Taste buds, the morphofunctional units for taste perception, transduce gustatory stimuli using G protein-coupled receptors, and a complex arrangement of ion channels, among which TRPV4, a member of the TRP superfamily. Studies on taste buds development on gilthead seabream are unknown, and the TRPV4 expression on fish taste cells studies were conducted only on zebrafish. METHODS In our study, we have investigated the histological features of the gilthead seabream tongue dorsal surface from the earliest stage of development using Masson trichrome with aniline blue staining. Additionally, TRPV4 expression pattern was studied by means of immunohistochemical labeling and quantitative RT-PCR. RESULTS We have recorded for the first time on gilthead seabream lingual dorsal surface the presence of, stage specific, three types of taste buds: type I, type II and type III in larvae, juvenile and adults respectively. At 40 days post hatching, taste buds were mature-looking. TRPV4 expression was detected in a subpopulation of taste cells of larvae, juveniles, and adults. Furthermore, TRPV4 was expressed in the basal epithelial cells of the tongue at the larvae and juvenile stage, while this expression pattern was more diffused within all the epithelial cell layers on the adult. CONCLUSION Our findings presume a taste sensory role of TRPV4 in the three stage-specific taste buds and oral epithelia of gilthead seabream. In addition to its sensory role on the epithelial cell layers, we hypothesize that TRPV4 is implicated in epithelial cells differentiation and membrane protection.
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Affiliation(s)
- Kamel Mhalhel
- Zebrafish Neuromorphology Lab, Department of Veterinary Sciences, Via Palatucci snc, University of Messina, 98168 Messina, Italy.
| | - Giuseppe Montalbano
- Zebrafish Neuromorphology Lab, Department of Veterinary Sciences, Via Palatucci snc, University of Messina, 98168 Messina, Italy
| | - Giovanni Giurdanella
- Faculty of Medicine and surgery, ''Kore'' University of Enna, Contrada Santa Panasia, 94100 Enna, Italy
| | - Francesco Abbate
- Zebrafish Neuromorphology Lab, Department of Veterinary Sciences, Via Palatucci snc, University of Messina, 98168 Messina, Italy
| | - Rosaria Laurà
- Zebrafish Neuromorphology Lab, Department of Veterinary Sciences, Via Palatucci snc, University of Messina, 98168 Messina, Italy
| | - Maria Cristina Guerrera
- Zebrafish Neuromorphology Lab, Department of Veterinary Sciences, Via Palatucci snc, University of Messina, 98168 Messina, Italy
| | - Antonino Germanà
- Zebrafish Neuromorphology Lab, Department of Veterinary Sciences, Via Palatucci snc, University of Messina, 98168 Messina, Italy
| | - Maria Levanti
- Zebrafish Neuromorphology Lab, Department of Veterinary Sciences, Via Palatucci snc, University of Messina, 98168 Messina, Italy.
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17
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Verlinden SMD, Norton T, Larsen MLV, Schroyen M, Youssef A, Everaert N. Influence of temperature during incubation on the mRNA levels of temperature sensitive ion channels in the brain of broiler chicken embryos. Comp Biochem Physiol A Mol Integr Physiol 2022; 268:111199. [PMID: 35337975 DOI: 10.1016/j.cbpa.2022.111199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 03/17/2022] [Accepted: 03/18/2022] [Indexed: 11/26/2022]
Abstract
Thermosensation is crucial for the survival of any organism. In animals, changes in brain temperature are detected via sensory neurons, their cell bodies are located in the trigeminal ganglia. Transient receptor potential (TRP) ion channels are the largest temperature sensing family. In mammals, 11 thermoTRPs are known, as in poultry, there are only three. This research further elucidates TRP mRNA expression in the brain of broiler embryo's. Three incubation treatments were conducted on 400 eggs each: the control (C) at 37.6 °C; T1 deviating from C by providing a + 1 °C heat stimuli during embryonic day (ED) 15-20 for 8 h a day; and T2, imposing a + 2 °C heat stimuli. After each heat stimuli, 12 eggs per treatment were taken for blood sampling from the chorioallantoic membrane and brain harvesting. Incubation parameters such has residual yolk (free embryonic) weight, chick quality and hatch percentage were collected. After primer optimization, 22 target genes (13 TRPs and 9 non-TRPs) were measured on mRNA of the brain using a nanofluidic biochip (Fluidigm Corporation). Four target genes (ANO2, TRPV1, SCN5A, TRAAK) have a significant treatment effect - independent of ED. Another four (TRPM8, TRPA1, TRPM2, TRPC3) have a significant treatment effect visible on one or more ED. Heat sensitive channels were increased in T2 and to a lesser degree in T1, which could be part of an acclimatisation process resulting in later life heat tolerance by increased heat sensitivity. T2, however, resulted in a lower hatch weight, quality and hatchability. No hormonal differences were detected.
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Affiliation(s)
- Sara Maria Daniel Verlinden
- Department of Biosystems, Divison Animal and human health engineering, M3-BIORES, KU Leuven, Kasteelpark Arenberg 30, 3001 Heverlee, Belgium
| | - Tomas Norton
- Department of Biosystems, Divison Animal and human health engineering, M3-BIORES, KU Leuven, Kasteelpark Arenberg 30, 3001 Heverlee, Belgium
| | - Mona Lilian Vestbjerg Larsen
- Department of Biosystems, Divison Animal and human health engineering, M3-BIORES, KU Leuven, Kasteelpark Arenberg 30, 3001 Heverlee, Belgium; Department of Animal Science, Aarhus University, Blichers Allé 20, DK-8830 Tjele, Denmark
| | - Martine Schroyen
- Department Gembloux AgroBio Tech, Precision Livestock and Nutrition Unit, TERRA Teaching and Research Centre, Liège University Passage des Déportés 2, 5030 Gembloux, Belgium
| | - Ali Youssef
- Department of Biosystems, Divison Animal and human health engineering, M3-BIORES, KU Leuven, Kasteelpark Arenberg 30, 3001 Heverlee, Belgium; Adaptation Physiology Group, Wageningen University & Research, P.O. Box 338, 6700, AH, Wageningen
| | - Nadia Everaert
- Department of Biosystems, Divison Animal and Human Health engineering, NAMES, KU Leuven, Kasteelpark Arenberg 30, 3001 Heverlee, Belgium.
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18
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Kwatra SG, Misery L, Clibborn C, Steinhoff M. Molecular and cellular mechanisms of itch and pain in atopic dermatitis and implications for novel therapeutics. Clin Transl Immunology 2022; 11:e1390. [PMID: 35582626 PMCID: PMC9082890 DOI: 10.1002/cti2.1390] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 04/07/2022] [Accepted: 04/11/2022] [Indexed: 12/03/2022] Open
Abstract
Atopic dermatitis is a chronic inflammatory skin disease. Patients with atopic dermatitis experience inflammatory lesions associated with intense itch and pain, which lead to sleep disturbance and poor mental health and quality of life. We review the molecular mechanisms underlying itch and pain symptoms in atopic dermatitis and discuss the current clinical development of treatments for moderate‐to‐severe atopic dermatitis. The molecular pathology of atopic dermatitis includes aberrant immune activation involving significant cross‐talk among the skin and immune and neuronal cells. Exogenous and endogenous triggers modulate stimulation of mediators including cytokine/chemokine expression/release by the skin and immune cells, which causes inflammation, skin barrier disruption, activation and growth of sensory neurons, itch and pain. These complex interactions among cell types are mediated primarily by cytokines, but also involve chemokines, neurotransmitters, lipids, proteases, antimicrobial peptides, agonists of ion channels or various G protein–coupled receptors. Patients with atopic dermatitis have a cytokine profile characterised by abnormal levels of interleukins 4, 12, 13, 18, 22, 31 and 33; thymic stromal lymphopoietin; and interferon gamma. Cytokine receptors mainly signal through the Janus kinase/signal transducer and activator of transcription pathway. Among emerging novel therapeutics, several Janus kinase inhibitors are being developed for topical or systemic treatment of moderate‐to‐severe atopic dermatitis because of their potential to modulate cytokine expression and release. Janus kinase inhibitors lead to changes in gene expression that have favourable effects on local and systemic cytokine release, and probably other mediators, thus successfully modulating molecular mechanisms responsible for itch and pain in atopic dermatitis.
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Affiliation(s)
- Shawn G Kwatra
- Department of Dermatology Johns Hopkins University School of Medicine Baltimore MD USA
| | - Laurent Misery
- Department of Dermatology University Hospital of Brest Brest France
| | | | - Martin Steinhoff
- Department of Dermatology and Venereology Hamad Medical Corporation Doha Qatar.,Translational Research Institute Academic Health System Hamad Medical Corporation Doha Qatar.,Dermatology Institute Academic Health System Hamad Medical Corporation Doha Qatar.,Department of Dermatology Weill Cornell Medicine-Qatar Doha Qatar.,Qatar University, College of Medicine Doha Qatar.,Department of Dermatology Weill Cornell Medicine New York NY USA
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19
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Caretta A, Mucignat-Caretta C. Not Only COVID-19: Involvement of Multiple Chemosensory Systems in Human Diseases. Front Neural Circuits 2022; 16:862005. [PMID: 35547642 PMCID: PMC9081982 DOI: 10.3389/fncir.2022.862005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Accepted: 03/21/2022] [Indexed: 11/13/2022] Open
Abstract
Chemosensory systems are deemed marginal in human pathology. In appraising their role, we aim at suggesting a paradigm shift based on the available clinical and experimental data that will be discussed. Taste and olfaction are polymodal sensory systems, providing inputs to many brain structures that regulate crucial visceral functions, including metabolism but also endocrine, cardiovascular, respiratory, and immune systems. Moreover, other visceral chemosensory systems monitor different essential chemical parameters of “milieu intérieur,” transmitting their data to the brain areas receiving taste and olfactory inputs; hence, they participate in regulating the same vital functions. These chemosensory cells share many molecular features with olfactory or taste receptor cells, thus they may be affected by the same pathological events. In most COVID-19 patients, taste and olfaction are disturbed. This may represent only a small portion of a broadly diffuse chemosensory incapacitation. Indeed, many COVID-19 peculiar symptoms may be explained by the impairment of visceral chemosensory systems, for example, silent hypoxia, diarrhea, and the “cytokine storm”. Dysregulation of chemosensory systems may underlie the much higher mortality rate of COVID-19 Acute Respiratory Distress Syndrome (ARDS) compared to ARDSs of different origins. In chronic non-infectious diseases like hypertension, diabetes, or cancer, the impairment of taste and/or olfaction has been consistently reported. This may signal diffuse chemosensory failure, possibly worsening the prognosis of these patients. Incapacitation of one or few chemosensory systems has negligible effects on survival under ordinary life conditions but, under stress, like metabolic imbalance or COVID-19 pneumonia, the impairment of multiple chemosensory systems may lead to dire consequences during the course of the disease.
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Affiliation(s)
- Antonio Caretta
- National Institute for Biostructures and Biosystems (NIBB), Rome, Italy
- Department of Food and Drug Science, University of Parma, Parma, Italy
| | - Carla Mucignat-Caretta
- National Institute for Biostructures and Biosystems (NIBB), Rome, Italy
- Department of Molecular Medicine, University of Padova, Padua, Italy
- *Correspondence: Carla Mucignat-Caretta,
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20
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Behrendt M, Solinski HJ, Schmelz M, Carr R. Bradykinin-Induced Sensitization of Transient Receptor Potential Channel Melastatin 3 Calcium Responses in Mouse Nociceptive Neurons. Front Cell Neurosci 2022; 16:843225. [PMID: 35496916 PMCID: PMC9043526 DOI: 10.3389/fncel.2022.843225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2021] [Accepted: 03/18/2022] [Indexed: 11/13/2022] Open
Abstract
TRPM3 is a calcium-permeable cation channel expressed in a range of sensory neurons that can be activated by heat and the endogenous steroid pregnenolone sulfate (PS). During inflammation, the expression and function of TRPM3 are both augmented in somatosensory nociceptors. However, in isolated dorsal root ganglion (DRG) neurons application of inflammatory mediators like prostaglandins and bradykinin (BK) inhibit TRPM3. Therefore, the aim of this study was to examine the effect of preceding activation of cultured 1 day old mouse DRG neurons by the inflammatory mediator BK on TRPM3-mediated calcium responses. Calcium signals were recorded using the intensity-based dye Fluo-8. We found that TRPM3-mediated calcium responses to PS were enhanced by preceding application of BK in cells that responded to BK with a calcium signal, indicating BK receptor (BKR) expression. The majority of cells that co-expressed TRPM3 and BKRs also expressed TRPV1, however, only a small fraction co-expressed TRPA1, identified by calcium responses to capsaicin and supercinnamaldehyde, respectively. Signaling and trafficking pathways responsible for sensitization of TRPM3 following BK were characterized using inhibitors of second messenger signaling cascades and exocytosis. Pharmacological blockade of protein kinase C, calcium–calmodulin-dependent protein kinase II and diacylglycerol (DAG) lipase did not affect BK-induced sensitization, but inhibition of DAG kinase did. In addition, release of calcium from intracellular stores using thapsigargin also resulted in TRPM3 sensitization. Finally, BK did not sensitize TRPM3 in the presence of exocytosis inhibitors. Collectively, we show that preceding activation of DRG neurons by BK sensitized TRPM3-mediated calcium responses to PS. Our results indicate that BKR-mediated activation of intracellular signaling pathways comprising DAG kinase, calcium and exocytosis may contribute to TRPM3 sensitization during inflammation.
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21
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Li X, Xu Y, Li H, Jia L, Wang J, Liang S, Cai A, Tan X, Wang L, Wang X, Huang Y, Tao E, Ye H, Asakawa T. Verification of pain-related neuromodulation mechanisms of icariin in knee osteoarthritis. Biomed Pharmacother 2021; 144:112259. [PMID: 34607107 DOI: 10.1016/j.biopha.2021.112259] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2021] [Revised: 09/21/2021] [Accepted: 09/26/2021] [Indexed: 12/19/2022] Open
Abstract
Knee osteoarthritis (KOA) is a common disease with no specific treatment. Icariin (ICA) is considered an agent for KOA. This study aimed to confirm the pain-related neuromodulation mechanisms of ICA on KOA. Three experiments were designed: (1) verifying the therapeutic effects of ICA in vivo and in vitro, (2) exploring the potential pain-related neuromodulation pathways involved in ICA treatment by functional magnetic resonance imaging (fMRI) and virus retrograde tracing (VRT) and (3) confirming the pain-related targets by tandem mass tag (TMT)-based quantitative proteomics and bioinformatic analyses. Experiment 1 verified the efficacy of ICA in OA animal and cell models. Experiment 2 found a series of brain regions associated with KOA reversed by ICA treatment, indicating that a pain-related hypothalamic-mediated neuromodulation pathway and an endocannabinoid (EC)-related pathway contribute to ICA mechanisms. Experiment 3 explored and confirmed four pain-related genes involved in KOA and ICA treatment. We confirmed the key role of pain-related neuromodulation mechanisms in ICA treatment associated with its analgesic effect. Our findings contribute to considering ICA as a novel therapy for KOA.
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MESH Headings
- Analgesics/pharmacology
- Animals
- Antirheumatic Agents/pharmacology
- Arthritis, Experimental/diagnostic imaging
- Arthritis, Experimental/drug therapy
- Arthritis, Experimental/metabolism
- Arthritis, Experimental/physiopathology
- Behavior, Animal/drug effects
- Brain/diagnostic imaging
- Brain/drug effects
- Brain/metabolism
- Brain/physiopathology
- Cells, Cultured
- Chondrocytes/drug effects
- Chondrocytes/metabolism
- Flavonoids/pharmacology
- Gene Expression Regulation
- Inflammation Mediators/metabolism
- Joints/drug effects
- Joints/innervation
- Joints/metabolism
- Magnetic Resonance Imaging
- Male
- Mice, Inbred C57BL
- Neuroanatomical Tract-Tracing Techniques
- Neuropeptides/genetics
- Neuropeptides/metabolism
- Osteoarthritis, Knee/diagnostic imaging
- Osteoarthritis, Knee/drug therapy
- Osteoarthritis, Knee/metabolism
- Osteoarthritis, Knee/physiopathology
- Pain Threshold/drug effects
- Proteomics
- Rats, Sprague-Dawley
- Signal Transduction
- Tandem Mass Spectrometry
- Mice
- Rats
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Affiliation(s)
- Xihai Li
- College of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China; Fujian Key Laboratory of Integrative Medicine on Geriatrics, Fuzhou 350122, China
| | - Yunteng Xu
- Fujian Key Laboratory of Integrative Medicine on Geriatrics, Fuzhou 350122, China; Academy of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China
| | - Hui Li
- Fujian Key Laboratory of Integrative Medicine on Geriatrics, Fuzhou 350122, China; Academy of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China
| | - Liangliang Jia
- Fujian Key Laboratory of Integrative Medicine on Geriatrics, Fuzhou 350122, China; Academy of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China
| | - Jie Wang
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Key Laboratory of Magnetic Resonance in Biological Systems, Wuhan 430071, China; Innovation Academy for Precision Measurement Science, Wuhan 430071, China
| | - Shengxiang Liang
- National-Local Joint Engineering Research Center of Rehabilitation Medicine Technology, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China; Rehabilitation Industry Institute, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China
| | - Aoling Cai
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Key Laboratory of Magnetic Resonance in Biological Systems, Wuhan 430071, China; Innovation Academy for Precision Measurement Science, Wuhan 430071, China
| | - Xue Tan
- Fujian Key Laboratory of Integrative Medicine on Geriatrics, Fuzhou 350122, China; Academy of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China
| | - Lili Wang
- Fujian Key Laboratory of Integrative Medicine on Geriatrics, Fuzhou 350122, China; Academy of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China
| | - Xiaoning Wang
- College of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China; Fujian Key Laboratory of Integrative Medicine on Geriatrics, Fuzhou 350122, China
| | - Yanfeng Huang
- Fujian Key Laboratory of Integrative Medicine on Geriatrics, Fuzhou 350122, China; Academy of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China
| | - Enxiang Tao
- Department of Neurology, The Eighth Affiliated Hospital, Sun Yat-Sen University, Shenzhen 518033, China
| | - Hongzhi Ye
- Fujian Key Laboratory of Integrative Medicine on Geriatrics, Fuzhou 350122, China; Academy of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China.
| | - Tetsuya Asakawa
- Department of Neurology, The Eighth Affiliated Hospital, Sun Yat-Sen University, Shenzhen 518033, China; Research Base of Traditional Chinese Medicine Syndrome, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China.
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22
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Ertilav K, Nazıroğlu M, Ataizi ZS, Yıldızhan K. Melatonin and Selenium Suppress Docetaxel-Induced TRPV1 Activation, Neuropathic Pain and Oxidative Neurotoxicity in Mice. Biol Trace Elem Res 2021; 199:1469-1487. [PMID: 32578137 DOI: 10.1007/s12011-020-02250-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Accepted: 06/11/2020] [Indexed: 12/13/2022]
Abstract
Docetaxel (DT) has been reported to positive therapeutic actions in the treatment of glioblastoma, breast tumors, and prostate cancers. However, it can also induce peripheral neuropathic pain and neurotoxicity as adverse effects. Expression level of TRPV1 cation channel is high in dorsal root ganglion (DRG), and its activation via capsaicin and reactive oxygen species (ROS) mediates peripheral neuropathic pain in mice. As cancer is known to increase the levels of ROS, the protective roles of melatonin (MT) and selenium (Se) were evaluated on the TRPV1-mediated neurotoxicity and pain in the DT-treated mice. Mice and TRPV1 expressing SH-SY5Y cells were equally divided into control, MT, Se, DT, DT+MT, and DT+Se groups. In the results of pain tests in the mice, we observed a decrease in DT-mediated mechanical and heat neuropathic pain by MT and Se. The results of plate reader assay and laser confocal microscopy image analyses indicated a protective role of MT and Se on the DT-induced increase of mitochondrial ROS, cytosolic ROS, apoptosis, lipid peroxidation, intracellular free Zn2+, Ca2+, and caspase-3 and -9 levels in the DRG and SH-SY5Y cells. MT and Se modulated DT-induced decreases of total antioxidant status, reduced glutathione and glutathione peroxidase in the DRG. However, the effects of DT were not observed in the non-TRPV1 expressing SH-SY5Y cells. Hence, MT and Se mediated protective effects against DT-induced adverse peripheral oxidative neurotoxicity and peripheral pain. These effects may be attributed to potent antioxidant properties of MT and Se.
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Affiliation(s)
- Kemal Ertilav
- Departmant of Neurosurgery, Faculty of Medicine, Suleyman Demirel University, Isparta, Turkey
| | - Mustafa Nazıroğlu
- Neuroscience Research Center, Suleyman Demirel University, Isparta, Turkey.
- Drug Discovery Unit, BSN Health, Analyses, Innovation, Consultancy, Organization, Agriculture and Industry Ltd, Göller Bölgesi Teknokenti, Isparta, Turkey.
- Department of Biophysics, Faculty of Medicine, Suleyman Demirel University, Isparta, Turkey.
| | - Zeki Serdar Ataizi
- Departmant of Neurosurgery, Yunus Emre General State Hospital, Eskişehir, Turkey
| | - Kenan Yıldızhan
- Department of Biophysics, Faculty of Medicine, Suleyman Demirel University, Isparta, Turkey
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23
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Vanneste M, Segal A, Voets T, Everaerts W. Transient receptor potential channels in sensory mechanisms of the lower urinary tract. Nat Rev Urol 2021; 18:139-159. [PMID: 33536636 DOI: 10.1038/s41585-021-00428-6] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/08/2021] [Indexed: 01/30/2023]
Abstract
Disruptions to sensory pathways in the lower urinary tract commonly occur and can give rise to lower urinary tract symptoms (LUTS). The unmet clinical need for treatment of LUTS has stimulated research into the molecular mechanisms that underlie neuronal control of the bladder and transient receptor potential (TRP) channels have emerged as key regulators of the sensory processes that regulate bladder function. TRP channels function as molecular sensors in urothelial cells and afferent nerve fibres and can be considered the origin of bladder sensations. TRP channels in the lower urinary tract contribute to the generation of normal and abnormal bladder sensations through a variety of mechanisms, and have demonstrated potential as targets for the treatment of LUTS in functional disorders of the lower urinary tract.
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Affiliation(s)
- Matthias Vanneste
- Laboratory of Ion Channel Research, VIB Center for Brain & Disease Research, Leuven, and Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium
| | - Andrei Segal
- Laboratory of Ion Channel Research, VIB Center for Brain & Disease Research, Leuven, and Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium
| | - Thomas Voets
- Laboratory of Ion Channel Research, VIB Center for Brain & Disease Research, Leuven, and Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium
| | - Wouter Everaerts
- Laboratory of Experimental Urology, Department of Development and Regeneration, KU Leuven, Leuven, Belgium.
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24
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Kittaka H, DeBrecht J, Mishra SK. Differential contribution of sensory transient receptor potential channels in response to the bioactive lipid sphingosine-1-phosphate. Mol Pain 2021; 16:1744806920903515. [PMID: 32089077 PMCID: PMC7040933 DOI: 10.1177/1744806920903515] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Affiliation(s)
- Hiroki Kittaka
- Department of Molecular Biomedical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA
| | - Jennifer DeBrecht
- Department of Molecular Biomedical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA
| | - Santosh K Mishra
- Department of Molecular Biomedical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA.,Comparative Medicine Institute, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA.,The WM Keck Behavioral Center, North Carolina State University, Raleigh, NC, USA.,Program in Genetics, North Carolina State University, Raleigh, NC, USA
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25
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Transient Receptor Potential (TRP) Ion Channels in Orofacial Pain. Mol Neurobiol 2021; 58:2836-2850. [PMID: 33515176 DOI: 10.1007/s12035-021-02284-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Accepted: 01/05/2021] [Indexed: 02/07/2023]
Abstract
Orofacial pain, including temporomandibular joint disorders pain, trigeminal neuralgia, dental pain, and debilitating headaches, affects millions of Americans each year with significant population health impact. Despite the existence of a large body of information on the subject, the molecular underpinnings of orofacial pain remain elusive. Two decades of research has identified that transient receptor potential (TRP) ion channels play a crucial role in pathological pain. A number of TRP ion channels are clearly expressed in the trigeminal sensory system and have critical functions in the transduction and pathogenesis of orofacial pain. Although there are many similarities, the orofacial sensory system shows some distinct peripheral and central pain processing and different sensitivities from the spinal sensory system. Relative to the extensive review on TRPs in spinally-mediated pain, the summary of TRPs in trigeminally-mediated pain has not been well-documented. This review focuses on the current experimental evidence involving TRP ion channels, particularly TRPV1, TRPA1, TRPV4, and TRPM8 in orofacial pain, and discusses their possible cellular and molecular mechanisms.
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26
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Behrendt M, Gruss F, Enzeroth R, Dembla S, Zhao S, Crassous PA, Mohr F, Nys M, Louros N, Gallardo R, Zorzini V, Wagner D, Economou A, Rousseau F, Schymkowitz J, Philipp SE, Rohacs T, Ulens C, Oberwinkler J. The structural basis for an on-off switch controlling Gβγ-mediated inhibition of TRPM3 channels. Proc Natl Acad Sci U S A 2020; 117:29090-29100. [PMID: 33122432 PMCID: PMC7682392 DOI: 10.1073/pnas.2001177117] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
TRPM3 channels play important roles in the detection of noxious heat and in inflammatory thermal hyperalgesia. The activity of these ion channels in somatosensory neurons is tightly regulated by µ-opioid receptors through the signaling of Gβγ proteins, thereby reducing TRPM3-mediated pain. We show here that Gβγ directly binds to a domain of 10 amino acids in TRPM3 and solve a cocrystal structure of this domain together with Gβγ. Using these data and mutational analysis of full-length proteins, we pinpoint three amino acids in TRPM3 and their interacting partners in Gβ1 that are individually necessary for TRPM3 inhibition by Gβγ. The 10-amino-acid Gβγ-interacting domain in TRPM3 is subject to alternative splicing. Its inclusion in or exclusion from TRPM3 channel proteins therefore provides a mechanism for switching on or off the inhibitory action that Gβγ proteins exert on TRPM3 channels.
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Affiliation(s)
- Marc Behrendt
- Institut für Physiologie und Pathophysiologie, Philipps-Universität Marburg, 35037 Marburg, Germany
- Center for Mind, Brain and Behavior (CMBB), Philipps-Universität Marburg and Justus-Liebig-Universität Giessen, 35032 Marburg, Germany
| | - Fabian Gruss
- Laboratory of Structural Neurobiology, Department of Cellular and Molecular Medicine, KU Leuven, 3000 Leuven, Belgium
| | - Raissa Enzeroth
- Institut für Physiologie und Pathophysiologie, Philipps-Universität Marburg, 35037 Marburg, Germany
- Center for Mind, Brain and Behavior (CMBB), Philipps-Universität Marburg and Justus-Liebig-Universität Giessen, 35032 Marburg, Germany
| | - Sandeep Dembla
- Institut für Physiologie und Pathophysiologie, Philipps-Universität Marburg, 35037 Marburg, Germany
- Center for Mind, Brain and Behavior (CMBB), Philipps-Universität Marburg and Justus-Liebig-Universität Giessen, 35032 Marburg, Germany
| | - Siyuan Zhao
- Department of Pharmacology, Physiology and Neuroscience, Rutgers New Jersey Medical School, Newark, NJ 07103
| | - Pierre-Antoine Crassous
- Department of Pharmacology, Physiology and Neuroscience, Rutgers New Jersey Medical School, Newark, NJ 07103
| | - Florian Mohr
- Institut für Physiologie und Pathophysiologie, Philipps-Universität Marburg, 35037 Marburg, Germany
| | - Mieke Nys
- Laboratory of Structural Neurobiology, Department of Cellular and Molecular Medicine, KU Leuven, 3000 Leuven, Belgium
| | - Nikolaos Louros
- Switch Laboratory, VIB Center for Brain and Disease Research, Department of Cellular and Molecular Medicine, KU Leuven, 3000 Leuven, Belgium
| | - Rodrigo Gallardo
- Switch Laboratory, VIB Center for Brain and Disease Research, Department of Cellular and Molecular Medicine, KU Leuven, 3000 Leuven, Belgium
| | - Valentina Zorzini
- Laboratory of Molecular Bacteriology, Department of Microbiology and Immunology, Rega Institute for Medical Research, KU Leuven, 3000 Leuven, Belgium
| | - Doris Wagner
- Institut für Physiologie und Pathophysiologie, Philipps-Universität Marburg, 35037 Marburg, Germany
| | - Anastassios Economou
- Laboratory of Molecular Bacteriology, Department of Microbiology and Immunology, Rega Institute for Medical Research, KU Leuven, 3000 Leuven, Belgium
| | - Frederic Rousseau
- Switch Laboratory, VIB Center for Brain and Disease Research, Department of Cellular and Molecular Medicine, KU Leuven, 3000 Leuven, Belgium
| | - Joost Schymkowitz
- Switch Laboratory, VIB Center for Brain and Disease Research, Department of Cellular and Molecular Medicine, KU Leuven, 3000 Leuven, Belgium
| | - Stephan E Philipp
- Experimentelle und Klinische Pharmakologie und Toxikologie, Universität des Saarlandes, 66421 Homburg, Germany
| | - Tibor Rohacs
- Department of Pharmacology, Physiology and Neuroscience, Rutgers New Jersey Medical School, Newark, NJ 07103
| | - Chris Ulens
- Laboratory of Structural Neurobiology, Department of Cellular and Molecular Medicine, KU Leuven, 3000 Leuven, Belgium;
| | - Johannes Oberwinkler
- Institut für Physiologie und Pathophysiologie, Philipps-Universität Marburg, 35037 Marburg, Germany;
- Center for Mind, Brain and Behavior (CMBB), Philipps-Universität Marburg and Justus-Liebig-Universität Giessen, 35032 Marburg, Germany
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27
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Morita T, Mitsuyama K, Yamasaki H, Mori A, Yoshimura T, Araki T, Morita M, Tsuruta K, Yamasaki S, Kuwaki K, Yoshioka S, Takedatsu H, Torimura T. Gene Expression of Transient Receptor Potential Channels in Peripheral Blood Mononuclear Cells of Inflammatory Bowel Disease Patients. J Clin Med 2020; 9:jcm9082643. [PMID: 32823895 PMCID: PMC7547374 DOI: 10.3390/jcm9082643] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2020] [Revised: 08/02/2020] [Accepted: 08/12/2020] [Indexed: 12/29/2022] Open
Abstract
We examined the expression profile of transient receptor potential (TRP) channels in peripheral blood mononuclear cells (PBMCs) from patients with inflammatory bowel disease (IBD). PBMCs were obtained from 41 ulcerative colitis (UC) patients, 34 Crohn's disease (CD) patients, and 30 normal subjects. mRNA levels of TRP channels were measured using the quantitative real-time polymerase chain reaction, and correlation tests with disease ranking, as well as laboratory parameters, were performed. Compared with controls, TRPV2 and TRPC1 mRNA expression was lower, while that of TRPM2, was higher in PBMCs of UC and CD patients. Moreover, TRPV3 mRNA expression was lower, while that of TRPV4 was higher in CD patients. TRPC6 mRNA expression was higher in patients with CD than in patients with UC. There was also a tendency for the expression of TRPV2 mRNA to be negatively correlated with disease activity in patients with UC and CD, while that of TRPM4 mRNA was negatively correlated with disease activity only in patients with UC. PBMCs from patients with IBD exhibited varying mRNA expression levels of TRP channel members, which may play an important role in the progression of IBD.
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Affiliation(s)
- Taku Morita
- Department of Medicine, Division of Gastroenterology, School of Medicine, Kurume University, 67 Asahi-Machi, Kurume 830-0011, Japan; (T.M.); (H.Y.); (A.M.); (T.Y.); (T.A.); (M.M.); (K.T.); (S.Y.); (K.K.); (S.Y.); (H.T.); (T.T.)
| | - Keiichi Mitsuyama
- Department of Medicine, Division of Gastroenterology, School of Medicine, Kurume University, 67 Asahi-Machi, Kurume 830-0011, Japan; (T.M.); (H.Y.); (A.M.); (T.Y.); (T.A.); (M.M.); (K.T.); (S.Y.); (K.K.); (S.Y.); (H.T.); (T.T.)
- Inflammatory Bowel Disease Center, Kurume University Hospital, 67 Asahi-Machi, Kurume 830-0011, Japan
- Correspondence: ; Tel.: +81-942-31-7561
| | - Hiroshi Yamasaki
- Department of Medicine, Division of Gastroenterology, School of Medicine, Kurume University, 67 Asahi-Machi, Kurume 830-0011, Japan; (T.M.); (H.Y.); (A.M.); (T.Y.); (T.A.); (M.M.); (K.T.); (S.Y.); (K.K.); (S.Y.); (H.T.); (T.T.)
- Inflammatory Bowel Disease Center, Kurume University Hospital, 67 Asahi-Machi, Kurume 830-0011, Japan
| | - Atsushi Mori
- Department of Medicine, Division of Gastroenterology, School of Medicine, Kurume University, 67 Asahi-Machi, Kurume 830-0011, Japan; (T.M.); (H.Y.); (A.M.); (T.Y.); (T.A.); (M.M.); (K.T.); (S.Y.); (K.K.); (S.Y.); (H.T.); (T.T.)
- Inflammatory Bowel Disease Center, Kurume University Hospital, 67 Asahi-Machi, Kurume 830-0011, Japan
| | - Tetsuhiro Yoshimura
- Department of Medicine, Division of Gastroenterology, School of Medicine, Kurume University, 67 Asahi-Machi, Kurume 830-0011, Japan; (T.M.); (H.Y.); (A.M.); (T.Y.); (T.A.); (M.M.); (K.T.); (S.Y.); (K.K.); (S.Y.); (H.T.); (T.T.)
- Inflammatory Bowel Disease Center, Kurume University Hospital, 67 Asahi-Machi, Kurume 830-0011, Japan
| | - Toshihiro Araki
- Department of Medicine, Division of Gastroenterology, School of Medicine, Kurume University, 67 Asahi-Machi, Kurume 830-0011, Japan; (T.M.); (H.Y.); (A.M.); (T.Y.); (T.A.); (M.M.); (K.T.); (S.Y.); (K.K.); (S.Y.); (H.T.); (T.T.)
- Inflammatory Bowel Disease Center, Kurume University Hospital, 67 Asahi-Machi, Kurume 830-0011, Japan
| | - Masaru Morita
- Department of Medicine, Division of Gastroenterology, School of Medicine, Kurume University, 67 Asahi-Machi, Kurume 830-0011, Japan; (T.M.); (H.Y.); (A.M.); (T.Y.); (T.A.); (M.M.); (K.T.); (S.Y.); (K.K.); (S.Y.); (H.T.); (T.T.)
- Inflammatory Bowel Disease Center, Kurume University Hospital, 67 Asahi-Machi, Kurume 830-0011, Japan
| | - Kozo Tsuruta
- Department of Medicine, Division of Gastroenterology, School of Medicine, Kurume University, 67 Asahi-Machi, Kurume 830-0011, Japan; (T.M.); (H.Y.); (A.M.); (T.Y.); (T.A.); (M.M.); (K.T.); (S.Y.); (K.K.); (S.Y.); (H.T.); (T.T.)
- Inflammatory Bowel Disease Center, Kurume University Hospital, 67 Asahi-Machi, Kurume 830-0011, Japan
| | - Sayo Yamasaki
- Department of Medicine, Division of Gastroenterology, School of Medicine, Kurume University, 67 Asahi-Machi, Kurume 830-0011, Japan; (T.M.); (H.Y.); (A.M.); (T.Y.); (T.A.); (M.M.); (K.T.); (S.Y.); (K.K.); (S.Y.); (H.T.); (T.T.)
| | - Kotaro Kuwaki
- Department of Medicine, Division of Gastroenterology, School of Medicine, Kurume University, 67 Asahi-Machi, Kurume 830-0011, Japan; (T.M.); (H.Y.); (A.M.); (T.Y.); (T.A.); (M.M.); (K.T.); (S.Y.); (K.K.); (S.Y.); (H.T.); (T.T.)
- Inflammatory Bowel Disease Center, Kurume University Hospital, 67 Asahi-Machi, Kurume 830-0011, Japan
| | - Shinichiro Yoshioka
- Department of Medicine, Division of Gastroenterology, School of Medicine, Kurume University, 67 Asahi-Machi, Kurume 830-0011, Japan; (T.M.); (H.Y.); (A.M.); (T.Y.); (T.A.); (M.M.); (K.T.); (S.Y.); (K.K.); (S.Y.); (H.T.); (T.T.)
- Inflammatory Bowel Disease Center, Kurume University Hospital, 67 Asahi-Machi, Kurume 830-0011, Japan
| | - Hidetoshi Takedatsu
- Department of Medicine, Division of Gastroenterology, School of Medicine, Kurume University, 67 Asahi-Machi, Kurume 830-0011, Japan; (T.M.); (H.Y.); (A.M.); (T.Y.); (T.A.); (M.M.); (K.T.); (S.Y.); (K.K.); (S.Y.); (H.T.); (T.T.)
- Inflammatory Bowel Disease Center, Kurume University Hospital, 67 Asahi-Machi, Kurume 830-0011, Japan
| | - Takuji Torimura
- Department of Medicine, Division of Gastroenterology, School of Medicine, Kurume University, 67 Asahi-Machi, Kurume 830-0011, Japan; (T.M.); (H.Y.); (A.M.); (T.Y.); (T.A.); (M.M.); (K.T.); (S.Y.); (K.K.); (S.Y.); (H.T.); (T.T.)
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28
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Canonical Transient Receptor Potential (TRPC) Channels in Nociception and Pathological Pain. Neural Plast 2020; 2020:3764193. [PMID: 32273889 PMCID: PMC7115173 DOI: 10.1155/2020/3764193] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 02/26/2020] [Accepted: 03/07/2020] [Indexed: 12/13/2022] Open
Abstract
Chronic pathological pain is one of the most intractable clinical problems faced by clinicians and can be devastating for patients. Despite much progress we have made in understanding chronic pain in the last decades, its underlying mechanisms remain elusive. It is assumed that abnormal increase of calcium levels in the cells is a key determinant in the transition from acute to chronic pain. Exploring molecular players mediating Ca2+ entry into cells and molecular mechanisms underlying activity-dependent changes in Ca2+ signaling in the somatosensory pain pathway is therefore helpful towards understanding the development of chronic, pathological pain. Canonical transient receptor potential (TRPC) channels form a subfamily of nonselective cation channels, which permit the permeability of Ca2+ and Na+ into the cells. Initiation of Ca2+ entry pathways by these channels triggers the development of many physiological and pathological functions. In this review, we will focus on the functional implication of TRPC channels in nociception with the elucidation of their role in the detection of external stimuli and nociceptive hypersensitivity.
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29
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Okada Y, Zhang Y, Zhang L, Yeh LK, Wang YC, Saika S, Liu CY. Shp2-mediated MAPK pathway regulates ΔNp63 in epithelium to promote corneal innervation and homeostasis. J Transl Med 2020; 100:630-642. [PMID: 31653968 PMCID: PMC7102931 DOI: 10.1038/s41374-019-0338-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Revised: 08/19/2019] [Accepted: 08/30/2019] [Indexed: 12/16/2022] Open
Abstract
Corneal nerve fibers serving sensory, reflex, and neurotrophic functions sustain corneal homeostasis and transparency to promote normal visual function. It is not known whether corneal epithelium is also important for the corneal innervation. Herein, we generated a compound transgenic mouse strain, K14rtTA;tetO-Cre (TC);Shp2flox/flox, in which Shp2 was conditionally knocked out from K14-positive cells including corneal epithelium (Shp2K14ce-cko) upon doxycycline (dox) administration. Our data reveal that Shp2K14ce-cko caused corneal denervation. More specifically, corneal epithelium thickness and corneal sensitivity reduced dramatically in Shp2K14ce-cko mice. In addition, corneal epithelial wound healing after debridement was delayed substantially in the mutant mice. These defects manifested in Shp2K14ce-cko mice resemble the symptoms of human neurotrophic keratopathy. Our in vitro study shows that neurite outgrowth of the mouse primary trigeminal ganglion cells (TGCs) was inhibited when as cocultured with mouse corneal epithelial cells (TKE2) transfected by Shp2-, Mek1/2-, or ∆Np63-targeted siRNA but not by Akt1/2-targeted siRNA. Furthermore, ∆Np63 RNA interference downregulated Ngf expression in TKE2 cells. Cotransfection experiments reveal that Shp2 tightly monitored ΔNp63 protein levels in HEK293 and TKE2 cells. Taken together, our data suggest that the Shp2-mediated MAPK pathway regulated ΔNp63, which in turn positively regulated Ngf in epithelium to promote corneal innervation and epithelial homeostasis.
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Affiliation(s)
- Yuka Okada
- Indiana University School of Optometry, Bloomington, IN, USA.
- Department of Ophthalmology, Wakayama Medical University, School of Medicine, Wakayama, Japan.
| | - Yujin Zhang
- Indiana University School of Optometry, Bloomington, IN, USA
| | - Lingling Zhang
- Indiana University School of Optometry, Bloomington, IN, USA
| | - Lung-Kun Yeh
- Department of Ophthalmology, Chang-Gung Memorial Hospital, Linko, Taiwan
| | - Yen-Chiao Wang
- Indiana University School of Optometry, Bloomington, IN, USA
| | - Shizuya Saika
- Department of Ophthalmology, Wakayama Medical University, School of Medicine, Wakayama, Japan
| | - Chia-Yang Liu
- Indiana University School of Optometry, Bloomington, IN, USA.
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30
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Kelemen B, Lisztes E, Vladár A, Hanyicska M, Almássy J, Oláh A, Szöllősi AG, Pénzes Z, Posta J, Voets T, Bíró T, Tóth BI. Volatile anaesthetics inhibit the thermosensitive nociceptor ion channel transient receptor potential melastatin 3 (TRPM3). Biochem Pharmacol 2020; 174:113826. [PMID: 31987857 DOI: 10.1016/j.bcp.2020.113826] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Accepted: 01/22/2020] [Indexed: 12/21/2022]
Abstract
BACKGROUND Volatile anaesthetics (VAs) are the most widely used compounds to induce reversible loss of consciousness and maintain general anaesthesia during surgical interventions. Although the mechanism of their action is not yet fully understood, it is generally believed, that VAs depress central nervous system functions mainly through modulation of ion channels in the neuronal membrane, including 2-pore-domain K+ channels, GABA and NMDA receptors. Recent research also reported their action on nociceptive and thermosensitive TRP channels expressed in the peripheral nervous system, including TRPV1, TRPA1, and TRPM8. Here, we investigated the effect of VAs on TRPM3, a less characterized member of the thermosensitive TRP channels playing a central role in noxious heat sensation. METHODS We investigated the effect of VAs on the activity of recombinant and native TRPM3, by monitoring changes in the intracellular Ca2+ concentration and measuring TRPM3-mediated transmembrane currents. RESULTS All the investigated VAs (chloroform, halothane, isoflurane, sevoflurane) inhibited both the agonist-induced (pregnenolone sulfate, CIM0216) and heat-activated Ca2+ signals and transmembrane currents in a concentration dependent way in HEK293T cells overexpressing recombinant TRPM3. Among the tested VAs, halothane was the most potent blocker (IC50 = 0.52 ± 0.05 mM). We also investigated the effect of VAs on native TRPM3 channels expressed in sensory neurons of the dorsal root ganglia. While VAs activated certain sensory neurons independently of TRPM3, they strongly and reversibly inhibited the agonist-induced TRPM3 activity. CONCLUSIONS These data provide a better insight into the molecular mechanism beyond the analgesic effect of VAs and propose novel strategies to attenuate TRPM3 dependent nociception.
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Affiliation(s)
- Balázs Kelemen
- Laboratory of Cellular and Molecular Physiology, Department of Physiology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary; Doctoral School of Molecular Medicine, University of Debrecen, Debrecen, Hungary
| | - Erika Lisztes
- Laboratory of Cellular and Molecular Physiology, Department of Physiology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Anita Vladár
- Laboratory of Cellular and Molecular Physiology, Department of Physiology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary; Doctoral School of Molecular Medicine, University of Debrecen, Debrecen, Hungary
| | - Martin Hanyicska
- Laboratory of Cellular and Molecular Physiology, Department of Physiology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary; Doctoral School of Molecular Medicine, University of Debrecen, Debrecen, Hungary
| | - János Almássy
- Laboratory of Cellular and Molecular Physiology, Department of Physiology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Attila Oláh
- Laboratory of Cellular and Molecular Physiology, Department of Physiology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Attila Gábor Szöllősi
- Department of Immunology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Zsófia Pénzes
- Doctoral School of Molecular Medicine, University of Debrecen, Debrecen, Hungary; Department of Immunology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - János Posta
- Laboratory of Toxicology, Department of Forensic Medicine, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Thomas Voets
- Laboratory of Ion Channel Research, VIB-KU Leuven Center for Brain & Disease Research, Leuven, Belgium; Department of Cellular and Molecular Medicine and TRP Research Platform Leuven (TRPLe), KU Leuven, Leuven, Belgium
| | - Tamás Bíró
- Department of Immunology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary; Hungarian Center of Excellence for Molecular Medicine, Szeged, Hungary
| | - Balázs István Tóth
- Laboratory of Cellular and Molecular Physiology, Department of Physiology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary.
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Neumann-Raizel H, Shilo A, Lev S, Mogilevsky M, Katz B, Shneor D, Shaul YD, Leffler A, Gabizon A, Karni R, Honigman A, Binshtok AM. 2-APB and CBD-Mediated Targeting of Charged Cytotoxic Compounds Into Tumor Cells Suggests the Involvement of TRPV2 Channels. Front Pharmacol 2019; 10:1198. [PMID: 31680972 PMCID: PMC6804401 DOI: 10.3389/fphar.2019.01198] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Accepted: 09/17/2019] [Indexed: 12/17/2022] Open
Abstract
Targeted delivery of therapeutic compounds to particular cell types such that they only affect the target cells is of great clinical importance since it can minimize undesired side effects. For example, typical chemotherapeutic treatments used in the treatment of neoplastic disorders are cytotoxic not only to cancer cells but also to most normal cells when exposed to a critical concentration of the compound. As such, many chemotherapeutics exhibit severe side effects, often prohibiting their effective use in the treatment of cancer. Here, we describe a new means for facilitated delivery of a clinically used chemotherapy compound' doxorubicin, into hepatocellular carcinoma cell line (BNL1 ME). We demonstrate that these cells express a large pore, cation non-selective transient receptor potential (TRP) channel V2. We utilized this channel to shuttle doxorubicin into BNL1 ME cells. We show that co-application of either cannabidiol (CBD) or 2-APB, the activators of TRPV2 channels, together with doxorubicin leads to significantly higher accumulation of doxorubicin in BNL1 ME cells than in BNL1 ME cells that were exposed to doxorubicin alone. Moreover, we demonstrate that sub-effective doses of doxorubicin when co-applied with either 2-APB or CBD lead to a significant decrease in the number of living BNL1 ME cell and BNL1 ME cell colonies in comparison to application of doxorubicin alone. Finally, we demonstrate that the doxorubicin-mediated cell death is significantly more potent, requiring an order of magnitude lower dose, when co-applied with CBD than with 2-APB. We suggest that CBD may have a dual effect in promoting doxorubicin-mediated cell death by facilitating the entry of doxorubicin via TRPV2 channels and preventing its clearance from the cells by inhibiting P-glycoprotein ATPase transporter. Collectively, these results provide a foundation for the use of large pore cation-non selective channels as “natural” drug delivery systems for targeting specific cell types.
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Affiliation(s)
- Hagit Neumann-Raizel
- Department of Medical Neurobiology, Institute for Medical Research Israel-Canada, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel.,The Edmond and Lily Safra Center for Brain Sciences, The Hebrew University, Jerusalem, Israel
| | - Asaf Shilo
- Department of Biochemistry and Molecular Biology, Institute for Medical Research Israel-Canada, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Shaya Lev
- Department of Medical Neurobiology, Institute for Medical Research Israel-Canada, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel.,The Edmond and Lily Safra Center for Brain Sciences, The Hebrew University, Jerusalem, Israel
| | - Maxim Mogilevsky
- Department of Biochemistry and Molecular Biology, Institute for Medical Research Israel-Canada, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Ben Katz
- Department of Medical Neurobiology, Institute for Medical Research Israel-Canada, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel.,The Edmond and Lily Safra Center for Brain Sciences, The Hebrew University, Jerusalem, Israel
| | - David Shneor
- Department of Biochemistry and Molecular Biology, Institute for Medical Research Israel-Canada, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Yoav D Shaul
- Department of Biochemistry and Molecular Biology, Institute for Medical Research Israel-Canada, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Andreas Leffler
- Department of Anesthesiology and Intensive Care Medicine, Hannover Medical School, Hannover, Germany
| | - Alberto Gabizon
- Shaare Zedek Medical Center and Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Rotem Karni
- Department of Biochemistry and Molecular Biology, Institute for Medical Research Israel-Canada, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Alik Honigman
- Department of Biochemistry and Molecular Biology, Institute for Medical Research Israel-Canada, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Alexander M Binshtok
- Department of Medical Neurobiology, Institute for Medical Research Israel-Canada, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel.,The Edmond and Lily Safra Center for Brain Sciences, The Hebrew University, Jerusalem, Israel
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32
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Takayama Y, Derouiche S, Maruyama K, Tominaga M. Emerging Perspectives on Pain Management by Modulation of TRP Channels and ANO1. Int J Mol Sci 2019; 20:E3411. [PMID: 31336748 PMCID: PMC6678529 DOI: 10.3390/ijms20143411] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 07/01/2019] [Accepted: 07/09/2019] [Indexed: 12/27/2022] Open
Abstract
Receptor-type ion channels are critical for detection of noxious stimuli in primary sensory neurons. Transient receptor potential (TRP) channels mediate pain sensations and promote a variety of neuronal signals that elicit secondary neural functions (such as calcitonin gene-related peptide [CGRP] secretion), which are important for physiological functions throughout the body. In this review, we focus on the involvement of TRP channels in sensing acute pain, inflammatory pain, headache, migraine, pain due to fungal infections, and osteo-inflammation. Furthermore, action potentials mediated via interactions between TRP channels and the chloride channel, anoctamin 1 (ANO1), can also generate strong pain sensations in primary sensory neurons. Thus, we also discuss mechanisms that enhance neuronal excitation and are dependent on ANO1, and consider modulation of pain sensation from the perspective of both cation and anion dynamics.
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Affiliation(s)
- Yasunori Takayama
- Department of Physiology, Showa University School of Medicine, 1-5-8 Hatanodai, Shinagawa, Tokyo 142-8555, Japan.
| | - Sandra Derouiche
- Thermal Biology group, Exploratory Research Center on Life and Living Systems, National Institutes for Natural Sciences, 5-1 Aza-higashiyama, Myodaiji, Okazaki, Aichi 444-8787, Japan.
| | - Kenta Maruyama
- National Institute for Physiological Sciences, National Institutes for Natural Sciences, 5-1 Aza-higashiyama, Myodaiji, Okazaki, Aichi 444-8787, Japan.
| | - Makoto Tominaga
- Thermal Biology group, Exploratory Research Center on Life and Living Systems, National Institutes for Natural Sciences, 5-1 Aza-higashiyama, Myodaiji, Okazaki, Aichi 444-8787, Japan.
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33
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Lee K, Lee BM, Park CK, Kim YH, Chung G. Ion Channels Involved in Tooth Pain. Int J Mol Sci 2019; 20:ijms20092266. [PMID: 31071917 PMCID: PMC6539952 DOI: 10.3390/ijms20092266] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2019] [Revised: 05/03/2019] [Accepted: 05/03/2019] [Indexed: 01/05/2023] Open
Abstract
The tooth has an unusual sensory system that converts external stimuli predominantly into pain, yet its sensory afferents in teeth demonstrate cytochemical properties of non-nociceptive neurons. This review summarizes the recent knowledge underlying this paradoxical nociception, with a focus on the ion channels involved in tooth pain. The expression of temperature-sensitive ion channels has been extensively investigated because thermal stimulation often evokes tooth pain. However, temperature-sensitive ion channels cannot explain the sudden intense tooth pain evoked by innocuous temperatures or light air puffs, leading to the hydrodynamic theory emphasizing the microfluidic movement within the dentinal tubules for detection by mechanosensitive ion channels. Several mechanosensitive ion channels expressed in dental sensory systems have been suggested as key players in the hydrodynamic theory, and TRPM7, which is abundant in the odontoblasts, and recently discovered PIEZO receptors are promising candidates. Several ligand-gated ion channels and voltage-gated ion channels expressed in dental primary afferent neurons have been discussed in relation to their potential contribution to tooth pain. In addition, in recent years, there has been growing interest in the potential sensory role of odontoblasts; thus, the expression of ion channels in odontoblasts and their potential relation to tooth pain is also reviewed.
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Affiliation(s)
- Kihwan Lee
- Gachon Pain Center and Department of Physiology, College of Medicine, Gachon University, Incheon 406-799, Korea.
| | - Byeong-Min Lee
- Department of Oral Physiology and Program in Neurobiology, School of Dentistry, Seoul National University, Seoul 08826, Korea.
| | - Chul-Kyu Park
- Gachon Pain Center and Department of Physiology, College of Medicine, Gachon University, Incheon 406-799, Korea.
| | - Yong Ho Kim
- Gachon Pain Center and Department of Physiology, College of Medicine, Gachon University, Incheon 406-799, Korea.
| | - Gehoon Chung
- Department of Oral Physiology and Program in Neurobiology, School of Dentistry, Seoul National University, Seoul 08826, Korea.
- Dental Research Institute, Seoul National University, Seoul 03080, Korea.
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34
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García-Ávila M, Islas LD. What is new about mild temperature sensing? A review of recent findings. Temperature (Austin) 2019; 6:132-141. [PMID: 31286024 PMCID: PMC6601417 DOI: 10.1080/23328940.2019.1607490] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Revised: 04/02/2019] [Accepted: 04/05/2019] [Indexed: 12/15/2022] Open
Abstract
The superfamily of Transient Receptor Potential (TRP) channels is composed by a group of calcium-permeable ionic channels with a generally shared topology. The thermoTRP channels are a subgroup of 11 members, found in the TRPA, TRPV, TRPC, and TRPM subfamilies. Historically, members of this subgroup have been classified as cold, warm or hot-specific temperature sensors. Recently, new experimental results have shown that the role that has been given to the thermoTRPs in thermosensation is not necessarily strict. In addition, it has been shown that these channels activate over temperature ranges, which can have variations depending on the species and the interaction with a specific biological context. Investigation of these interactions could help to elucidate the mechanisms of activation by temperature, which remains uncertain. Abbreviations: Cryo-EM: Cryogenic electron microscopy; DRG: Dorsal root ganglia; H: Human; ROS: Reactive Oxygen Species; TG: Trigeminal ganglia; TRP: Transient Receptor Potential; TRPA: TRP ankyrin; TRPV: TRP vanilloid; TRPC: TRP canonical; TRPM: TRP melastatin.
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Affiliation(s)
| | - León D. Islas
- Departamento de Fisiología, Facultad de Medicina, UNAM, México City, México
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35
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Long-Term Diabetic Microenvironment Augments the Decay Rate of Capsaicin-Induced Currents in Mouse Dorsal Root Ganglion Neurons. Molecules 2019; 24:775. [PMID: 30795543 PMCID: PMC6412516 DOI: 10.3390/molecules24040775] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Revised: 02/16/2019] [Accepted: 02/19/2019] [Indexed: 12/04/2022] Open
Abstract
Individuals with end-stage diabetic peripheral neuropathy present with decreased pain sensation. Transient receptor potential vanilloid type 1 (TRPV1) is implicated in pain signaling and resides on sensory dorsal root ganglion (DRG) neurons. We investigated the expression and functional activity of TRPV1 in DRG neurons of the Ins2+/Akita mouse at 9 months of diabetes using immunohistochemistry, live single cell calcium imaging, and whole-cell patch-clamp electrophysiology. 2′,7′-Dichlorodihydrofluorescein diacetate (DCFH-DA) fluorescence assay was used to determine the level of Reactive Oxygen Species (ROS) in DRGs. Although TRPV1 expressing neuron percentage was increased in Ins2+/Akita DRGs at 9 months of diabetes compared to control, capsaicin-induced Ca2+ influx was smaller in isolated Ins2+/Akita DRG neurons, indicating impaired TRPV1 function. Consistently, capsaicin-induced Ca2+ influx was decreased in control DRG neurons cultured in the presence of 25 mM glucose for seven days versus those cultured with 5.5 mM glucose. The high glucose environment increased cytoplasmic ROS accumulation in cultured DRG neurons. Patch-clamp recordings revealed that capsaicin-activated currents decayed faster in isolated Ins2+/Akita DRG neurons as compared to those in control neurons. We propose that in poorly controlled diabetes, the accelerated rate of capsaicin-sensitive TRPV1 current decay in DRG neurons decreases overall TRPV1 activity and contributes to peripheral neuropathy.
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36
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Sensory nerve supports epithelial stem cell function in healing of corneal epithelium in mice: the role of trigeminal nerve transient receptor potential vanilloid 4. J Transl Med 2019; 99:210-230. [PMID: 30413814 DOI: 10.1038/s41374-018-0118-4] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Revised: 07/06/2018] [Accepted: 07/09/2018] [Indexed: 01/24/2023] Open
Abstract
In order to understand the pathobiology of neurotrophic keratopathy, we established a mouse model by coagulating the first branch of the trigeminal nerve (V1 nerve). In our model, the sensory nerve in the central cornea disappeared and remaining fibers were sparse in the peripheral limbal region. Impaired corneal epithelial healing in the mouse model was associated with suppression of both cell proliferation and expression of stem cell markers in peripheral/limbal epithelium as well as a reduction of transient receptor potential vanilloid 4 (TRPV4) expression in tissue. TRPV4 gene knockout also suppressed epithelial repair in mouse cornea, although it did not seem to directly modulate migration of epithelium. In a co-culture experiment, TRPV4-introduced KO trigeminal ganglion upregulated nerve growth factor (NGF) in cultured corneal epithelial cells, but ganglion with a control vector did not. TRPV4 gene introduction into a damaged V1 nerve rescues the impairment of epithelial healing in association with partial recovery of the stem/progenitor cell markers and upregulation of cell proliferation and of NGF expression in the peripheral/limbal epithelium. Gene transfer of TRPV4 did not accelerate the regeneration of nerve fibers. Sensory nerve TRPV4 is critical to maintain stemness of peripheral/limbal basal cells, and is one of the major mechanisms of homeostasis maintenance of corneal epithelium.
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37
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Hossain MZ, Bakri MM, Yahya F, Ando H, Unno S, Kitagawa J. The Role of Transient Receptor Potential (TRP) Channels in the Transduction of Dental Pain. Int J Mol Sci 2019; 20:ijms20030526. [PMID: 30691193 PMCID: PMC6387147 DOI: 10.3390/ijms20030526] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2018] [Revised: 01/18/2019] [Accepted: 01/24/2019] [Indexed: 12/18/2022] Open
Abstract
Dental pain is a common health problem that negatively impacts the activities of daily living. Dentine hypersensitivity and pulpitis-associated pain are among the most common types of dental pain. Patients with these conditions feel pain upon exposure of the affected tooth to various external stimuli. However, the molecular mechanisms underlying dental pain, especially the transduction of external stimuli to electrical signals in the nerve, remain unclear. Numerous ion channels and receptors localized in the dental primary afferent neurons (DPAs) and odontoblasts have been implicated in the transduction of dental pain, and functional expression of various polymodal transient receptor potential (TRP) channels has been detected in DPAs and odontoblasts. External stimuli-induced dentinal tubular fluid movement can activate TRP channels on DPAs and odontoblasts. The odontoblasts can in turn activate the DPAs by paracrine signaling through ATP and glutamate release. In pulpitis, inflammatory mediators may sensitize the DPAs. They could also induce post-translational modifications of TRP channels, increase trafficking of these channels to nerve terminals, and increase the sensitivity of these channels to stimuli. Additionally, in caries-induced pulpitis, bacterial products can directly activate TRP channels on DPAs. In this review, we provide an overview of the TRP channels expressed in the various tooth structures, and we discuss their involvement in the development of dental pain.
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Affiliation(s)
- Mohammad Zakir Hossain
- Department of Oral Physiology, School of Dentistry, Matsumoto Dental University, 1780 Gobara Hirooka, Shiojiri, Nagano 399-0781, Japan.
| | - Marina Mohd Bakri
- Department of Oral and Craniofacial Sciences, Faculty of Dentistry, University of Malaya, Kuala Lumpur 50603, Malaysia.
| | - Farhana Yahya
- Department of Oral and Craniofacial Sciences, Faculty of Dentistry, University of Malaya, Kuala Lumpur 50603, Malaysia.
| | - Hiroshi Ando
- Department of Biology, School of Dentistry, Matsumoto Dental University, 1780 Gobara, Hirooka, Shiojiri, Nagano 399-0781, Japan.
| | - Shumpei Unno
- Department of Oral Physiology, School of Dentistry, Matsumoto Dental University, 1780 Gobara Hirooka, Shiojiri, Nagano 399-0781, Japan.
| | - Junichi Kitagawa
- Department of Oral Physiology, School of Dentistry, Matsumoto Dental University, 1780 Gobara Hirooka, Shiojiri, Nagano 399-0781, Japan.
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Demartini C, Greco R, Zanaboni AM, Francesconi O, Nativi C, Tassorelli C, Deseure K. Antagonism of Transient Receptor Potential Ankyrin Type-1 Channels as a Potential Target for the Treatment of Trigeminal Neuropathic Pain: Study in an Animal Model. Int J Mol Sci 2018; 19:ijms19113320. [PMID: 30366396 PMCID: PMC6274796 DOI: 10.3390/ijms19113320] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Revised: 10/17/2018] [Accepted: 10/23/2018] [Indexed: 12/16/2022] Open
Abstract
Transient receptor potential ankyrin type-1 (TRPA1) channels are known to actively participate in different pain conditions, including trigeminal neuropathic pain, whose clinical treatment is still unsatisfactory. The aim of this study was to evaluate the involvement of TRPA1 channels by means of the antagonist ADM_12 in trigeminal neuropathic pain, in order to identify possible therapeutic targets. A single treatment of ADM_12 in rats 4 weeks after the chronic constriction injury of the infraorbital nerve (IoN-CCI) significantly reduced the mechanical allodynia induced in the IoN-CCI rats. Additionally, ADM_12 was able to abolish the increased levels of TRPA1, calcitonin gene-related peptide (CGRP), substance P (SP), and cytokines gene expression in trigeminal ganglia, cervical spinal cord, and medulla induced in the IoN-CCI rats. By contrast, no significant differences between groups were seen as regards CGRP and SP protein expression in the pars caudalis of the spinal nucleus of the trigeminal nerve. ADM_12 also reduced TRP vanilloid type-1 (TRPV1) gene expression in the same areas after IoN-CCI. Our findings show the involvement of both TRPA1 and TRPV1 channels in trigeminal neuropathic pain, and in particular, in trigeminal mechanical allodynia. Furthermore, they provide grounds for the use of ADM_12 in the treatment of trigeminal neuropathic pain.
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Affiliation(s)
- Chiara Demartini
- Laboratory of Neurophysiology of Integrative Autonomic Systems, Headache Science Center, IRCCS Mondino Foundation, via Mondino 2, 27100 Pavia, Italy.
| | - Rosaria Greco
- Laboratory of Neurophysiology of Integrative Autonomic Systems, Headache Science Center, IRCCS Mondino Foundation, via Mondino 2, 27100 Pavia, Italy.
| | - Anna Maria Zanaboni
- Laboratory of Neurophysiology of Integrative Autonomic Systems, Headache Science Center, IRCCS Mondino Foundation, via Mondino 2, 27100 Pavia, Italy.
- Department of Brain and Behavioral Sciences, University of Pavia, via Bassi 21, 27100 Pavia, Italy.
| | - Oscar Francesconi
- Department of Chemistry 'Ugo Schiff', University of Florence, Via della Lastruccia 3-13, 50019 Sesto Fiorentino (FI), Italy.
| | - Cristina Nativi
- Department of Chemistry 'Ugo Schiff', University of Florence, Via della Lastruccia 3-13, 50019 Sesto Fiorentino (FI), Italy.
| | - Cristina Tassorelli
- Laboratory of Neurophysiology of Integrative Autonomic Systems, Headache Science Center, IRCCS Mondino Foundation, via Mondino 2, 27100 Pavia, Italy.
- Department of Brain and Behavioral Sciences, University of Pavia, via Bassi 21, 27100 Pavia, Italy.
| | - Kristof Deseure
- Department of Medicine, Laboratory for Pain Research, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium.
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Ito M, Ono K, Hitomi S, Nodai T, Sago T, Yamaguchi K, Harano N, Gunnjigake K, Hosokawa R, Kawamoto T, Inenaga K. Prostanoid-dependent spontaneous pain and PAR 2-dependent mechanical allodynia following oral mucosal trauma: involvement of TRPV1, TRPA1 and TRPV4. Mol Pain 2018; 13:1744806917704138. [PMID: 28381109 PMCID: PMC5407658 DOI: 10.1177/1744806917704138] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract During dental treatments, intraoral appliances frequently induce traumatic ulcers in the oral mucosa. Such mucosal injury-induced mucositis leads to severe pain, resulting in poor quality of life and decreased cooperation in the therapy. To elucidate mucosal pain mechanisms, we developed a new rat model of intraoral wire-induced mucositis and investigated pain mechanisms using our proprietary assay system for conscious rats. A thick metal wire was installed in the rats between the inferior incisors for one day. In the mucosa of the mandibular labial fornix region, which was touched with a free end of the wire, traumatic ulcer and submucosal abscess were induced on day 1. The ulcer was quickly cured until next day and abscess formation was gradually disappeared until five days. Spontaneous nociceptive behavior was induced on day 1 only, and mechanical allodynia persisted over day 3. Antibiotic pretreatment did not affect pain induction. Spontaneous nociceptive behavior was sensitive to indomethacin (cyclooxygenase inhibitor), ONO-8711 (prostanoid receptor EP1 antagonist), SB-366791, and HC-030031 (TRPV1 and TRPA1 antagonists, respectively). Prostaglandin E2 and 15-deoxyΔ12,14-prostaglandin J2 were upregulated only on day 1. In contrast, mechanical allodynia was sensitive to FSLLRY-NH2 (protease-activated receptor PAR2 antagonist) and RN-1734 (TRPV4 antagonist). Neutrophil elastase, which is known as a biased agonist for PAR2, was upregulated on days 1 to 2. These results suggest that prostanoids and PAR2 activation elicit TRPV1- and TRPA1-mediated spontaneous pain and TRPV4-mediated mechanical allodynia, respectively, independently of bacterial infection, following oral mucosal trauma. The pathophysiological pain mechanism suggests effective analgesic approaches for dental patients suffering from mucosal trauma-induced pain.
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40
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Barbero R, Vercelli C, Cuniberti B, Della Valle MF, Martano M, Re G. Expression of functional TRPV1 receptor in primary culture of canine keratinocytes. J Vet Pharmacol Ther 2018; 41:795-804. [PMID: 30043987 DOI: 10.1111/jvp.12694] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Revised: 05/18/2018] [Accepted: 06/11/2018] [Indexed: 12/20/2022]
Abstract
The interest for the endovanilloid system and for transient receptor potential vanilloid 1 (TRPV1) is continuously increasing, due to their involvement in inflammation, nociception and pruritus. Even if TRPV1 enrolment was highlighted in both physiological and pathological conditions, some aspects remain unclear, mostly in veterinary medicine. This study aimed to verify the expression and functionality of TRPV1 in canine keratinocytes to investigate in vitro the role of TRPV1 in these cells that are involved in different cutaneous pathologies. Keratinocytes primary cultures were isolated from bioptical samples and cultivated. Binding assay (using 3 [H]-resiniferatoxin), displacement assay (in the presence of 1.2 nM 3 [H]-resiniferatoxin) and functional assays (in the presence of 1 μCi/45 Ca2+ ) with vanilloid agonists and antagonists, specifically addressed to TRPV1 receptor, were performed. Binding assay demonstrated the presence of measurable concentrations of TRPV1 (Bmax = 1,240 ± 120 fmol/mg protein; Kd = 0.01 ± 0.004 nM). Displacement assay highlighted the highest affinity for resiniferatoxin (RTX) and 5-iodo-resiniferatoxin (5-I-RTX), among agonists and antagonists, respectively. The same compounds results as the most potent in the functional assays. This study demonstrated the identification and the characterization of TRPV1 receptor in primary canine keratinocytes cultures. The results are promising for a clinical use, but further in vivo investigations are required.
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Affiliation(s)
- Raffaella Barbero
- SC of Serology, Istituto Zooprofilattico Sperimentale Piemonte Liguria e Valle d'Aosta, Turin, Italy
| | - Cristina Vercelli
- Department of Veterinary Sciences of Turin, University of Turin, Turin, Italy
| | - Barbara Cuniberti
- Royal Dick School of Veterinary Medicine, The University of Edinburg, Edinburg, Ireland
| | | | - Marina Martano
- Department of Veterinary Sciences of Turin, University of Turin, Turin, Italy
| | - Giovanni Re
- Department of Veterinary Sciences of Turin, University of Turin, Turin, Italy
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A Proposed Molecular Mechanism for Physical Analgesia in Chronic Pain. Neural Plast 2018; 2018:1260285. [PMID: 29887879 PMCID: PMC5985137 DOI: 10.1155/2018/1260285] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2017] [Revised: 03/22/2018] [Accepted: 03/27/2018] [Indexed: 12/20/2022] Open
Abstract
Although pain is indispensable for survival, chronic pain places a heavy burden on humans. As the efficacy of opioid treatment is limited, the development of alternative methods of pain relief without medication is desirable. Recently, we have developed a novel method of physical analgesia using an adhesive “pyramidal thorn patch.” When we apply about 3 trials of these patches on the skin of a pain region, the pain region moves toward the spinal cord like a “cutaneous rabbit,” and finally, the pain vanishes. In the present review, we propose a molecular mechanism for this analgesic method or pain relief following application of the pyramidal thorn patch where firstly the mechanoreceptors and their related nerves under the skin are activated in response to touch. Transient receptor potential (TRP) channels serve as mechanosensitive channels within these mechanoreceptors. We further propose that activation of the nerves connected with the mechanoreceptors releases oxytocin, which has an antinociceptive function and activates TRP channels to hyperpolarize the pain signal nerves. We believe that our system will pave the way for alternative pain treatment.
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42
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Boonen B, Alpizar YA, Sanchez A, López-Requena A, Voets T, Talavera K. Differential effects of lipopolysaccharide on mouse sensory TRP channels. Cell Calcium 2018; 73:72-81. [PMID: 29689522 DOI: 10.1016/j.ceca.2018.04.004] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2018] [Revised: 03/24/2018] [Accepted: 04/10/2018] [Indexed: 12/24/2022]
Abstract
Acute neurogenic inflammation and pain associated to bacterial infection have been traditionally ascribed to sensitization and activation of sensory nerve afferents secondary to immune cell stimulation. However, we recently showed that lipopolysaccharides (LPS) directly activate the Transient Receptor Potential channels TRPA1 in sensory neurons and TRPV4 in airway epithelial cells. Here we investigated whether LPS activates other sensory TRP channels expressed in sensory neurons. Using intracellular Ca2+ imaging and patch-clamp we determined the effects of LPS on recombinant TRPV1, TRPV2, TRPM3 and TRPM8, heterologously expressed in HEK293T cells. We found that LPS activates TRPV1, although with lower potency than for TRPA1. Activation of TRPV1 by LPS was not affected by mutations of residues required for activation by electrophilic agents or by diacylglycerol and capsaicin. On the other hand, LPS weakly activated TRPM3, activated TRPM8 at 25 °C, but not at 35 °C, and was ineffective on TRPV2. Experiments performed in mouse dorsal root ganglion (DRG) neurons revealed that genetic ablation of Trpa1 did not abolish the responses to LPS, but remain detected in 30% of capsaicin-sensitive cells. The population of neurons responding to LPS was dramatically lower in double Trpa1/Trpv1 KO neurons. Our results show that, in addition to TRPA1, other TRP channels in sensory neurons can be targets of LPS, suggesting that they may contribute to trigger and regulate innate defenses against gram-negative bacterial infections.
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Affiliation(s)
- Brett Boonen
- Laboratory for Ion Channel Research, Department of Cellular and Molecular Medicine, KU Leuven, VIB Center for Brain & Disease Research, O&N1 Herestraat 49 - box 802, 3000, Leuven, Belgium
| | - Yeranddy A Alpizar
- Laboratory for Ion Channel Research, Department of Cellular and Molecular Medicine, KU Leuven, VIB Center for Brain & Disease Research, O&N1 Herestraat 49 - box 802, 3000, Leuven, Belgium
| | - Alicia Sanchez
- Laboratory for Ion Channel Research, Department of Cellular and Molecular Medicine, KU Leuven, VIB Center for Brain & Disease Research, O&N1 Herestraat 49 - box 802, 3000, Leuven, Belgium
| | - Alejandro López-Requena
- Laboratory for Ion Channel Research, Department of Cellular and Molecular Medicine, KU Leuven, VIB Center for Brain & Disease Research, O&N1 Herestraat 49 - box 802, 3000, Leuven, Belgium
| | - Thomas Voets
- Laboratory for Ion Channel Research, Department of Cellular and Molecular Medicine, KU Leuven, VIB Center for Brain & Disease Research, O&N1 Herestraat 49 - box 802, 3000, Leuven, Belgium
| | - Karel Talavera
- Laboratory for Ion Channel Research, Department of Cellular and Molecular Medicine, KU Leuven, VIB Center for Brain & Disease Research, O&N1 Herestraat 49 - box 802, 3000, Leuven, Belgium.
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43
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Abstract
The postembryonic brain exhibits experience-dependent development, in which sensory experience guides normal brain growth. This neuroplasticity is thought to occur primarily through structural and functional changes in pre-existing neurons. Whether neurogenesis also mediates the effects of experience on brain growth is unclear. Here, we characterized the importance of motor experience on postembryonic neurogenesis in larval zebrafish. We found that movement maintains an expanded pool of forebrain neural precursors by promoting progenitor self-renewal over the production of neurons. Physical cues associated with swimming (bodily movement) increase neurogenesis and these cues appear to be conveyed by dorsal root ganglia (DRG) in the zebrafish body: DRG-deficient larvae exhibit attenuated neurogenic responses to movement and targeted photoactivation of DRG in immobilized larvae expands the pallial pool of proliferative cells. Our results demonstrate the importance of movement in neurogenic brain growth and reveal a fundamental sensorimotor association that may couple early motor and brain development. Sensory experiences early in life help the brain to grow and develop. For example, raising animals in complete darkness stops the visual areas of their brain from forming properly. Previous studies have shown that sensory input helps to strengthen the connections between already existing brain cells, but it is unclear if it affects the actual creation of new brain cells. Conditions that reduce the mobility of young children, such as muscular disease, are often accompanied by learning difficulties. This suggests that physical movement may be important for healthy brain development. Scientists have previously found a link between exercise and an increased production of new brain cells in adults. However, such a link has not been established earlier in life, when the brain is developing the most. To address this, Hall and Tropepe studied how movement affects the brain development in zebrafish larvae, at an age when many of their brain cells are created. Restraining the larvae decreased their physical movement, while making them swim against a current increased their movement. Hall et al. looked at how this affected the larvae’s number of so called progenitor cells – the cells from which brain cells are created. When the larvae moved less, the number of progenitor cells decreased. But when they moved more frequently, the amount of progenitor cells increased. The experiments also showed that some sensory cells, which detect sensations associated with movement of the body during swimming, are linked to brain cell production. Blocking the development of these sensory cells prevented the rise in progenitor cells seen with increased movement in the larvae. However, activating these sensory cells in immobilised larvae increased the number of progenitor cells, even though the larvae could not move. These findings suggest that measures to increase physical movement in young children could be used to help the brain develop normally.
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Affiliation(s)
- Zachary Jonas Hall
- Department of Cell & Systems Biology, University of Toronto, Toronto, Canada
| | - Vincent Tropepe
- Department of Cell & Systems Biology, University of Toronto, Toronto, Canada
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von der Ahe D, Huehnchen P, Balkaya M, Peruzzaro S, Endres M, Boehmerle W. Suramin-Induced Neurotoxicity: Preclinical Models and Neuroprotective Strategies. Molecules 2018; 23:molecules23020346. [PMID: 29414872 PMCID: PMC6017835 DOI: 10.3390/molecules23020346] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Revised: 01/23/2018] [Accepted: 02/03/2018] [Indexed: 11/16/2022] Open
Abstract
Suramin is a trypan blue analogon originally developed to treat protozoan infections, which was found to have diverse antitumor effects. One of the most severe side effects in clinical trials was the development of a peripheral sensory-motor polyneuropathy. In this study, we aimed to investigate suramin-induced neuropathy with a focus on calcium (Ca2+) homeostasis as a potential pathomechanism. Adult C57Bl/6 mice treated with a single injection of 250 mg/kg bodyweight suramin developed locomotor and sensory deficits, which were confirmed by electrophysiological measurements showing a predominantly sensory axonal-demyelinating polyneuropathy. In a next step, we used cultured dorsal root ganglia neurons (DRGN) as an in vitro cell model to further investigate underlying pathomechanisms. Cell viability of DRGN was significantly decreased after 24-hour suramin treatment with a calculated IC50 of 283 µM. We detected a suramin-induced Ca2+ influx into DRGN from the extracellular space, which could be reduced with the voltage-gated calcium channel (VGCC) inhibitor nimodipine. Co-incubation of suramin and nimodipine partially improved cell viability of DRGN after suramin exposure. In summary, we describe suramin-induced neurotoxic effects on DRGN as well as potentially neuroprotective agents targeting intracellular Ca2+ dyshomeostasis.
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Affiliation(s)
- David von der Ahe
- Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Klinik und Hochschulambulanz für Neurologie, Chariteplatz 1, 10117 Berlin, Germany.
| | - Petra Huehnchen
- Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Klinik und Hochschulambulanz für Neurologie, Chariteplatz 1, 10117 Berlin, Germany.
- Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Cluster of Excellence NeuroCure, 10117 Berlin, Germany.
- Berlin Institute of Health, Anna-Louisa-Karsch 2, 10178 Berlin, Germany.
| | - Mustafa Balkaya
- Burke-Cornell Medical Research Institute, White Plains, NY 10605, USA.
| | - Sarah Peruzzaro
- Field Neurosciences Institute Laboratory for Restorative Neurology, Central Michigan University, Mt. Pleasant, MI 48859, USA.
| | - Matthias Endres
- Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Klinik und Hochschulambulanz für Neurologie, Chariteplatz 1, 10117 Berlin, Germany.
- Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Cluster of Excellence NeuroCure, 10117 Berlin, Germany.
- Berlin Institute of Health, Anna-Louisa-Karsch 2, 10178 Berlin, Germany.
- Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Center for Stroke Resarch Berlin, 10117 Berlin, Germany.
- German Center for Neurodegenerative Diseases (DZNE), 10117 Berlin, Germany.
- German Center for Cardiovascular Research (DZHK), Partner Site Berlin, 10117 Berlin, Germany.
| | - Wolfgang Boehmerle
- Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Klinik und Hochschulambulanz für Neurologie, Chariteplatz 1, 10117 Berlin, Germany.
- Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Cluster of Excellence NeuroCure, 10117 Berlin, Germany.
- Berlin Institute of Health, Anna-Louisa-Karsch 2, 10178 Berlin, Germany.
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45
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Moore C, Gupta R, Jordt SE, Chen Y, Liedtke WB. Regulation of Pain and Itch by TRP Channels. Neurosci Bull 2018; 34:120-142. [PMID: 29282613 PMCID: PMC5799130 DOI: 10.1007/s12264-017-0200-8] [Citation(s) in RCA: 191] [Impact Index Per Article: 31.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Accepted: 10/27/2017] [Indexed: 02/07/2023] Open
Abstract
Nociception is an important physiological process that detects harmful signals and results in pain perception. In this review, we discuss important experimental evidence involving some TRP ion channels as molecular sensors of chemical, thermal, and mechanical noxious stimuli to evoke the pain and itch sensations. Among them are the TRPA1 channel, members of the vanilloid subfamily (TRPV1, TRPV3, and TRPV4), and finally members of the melastatin group (TRPM2, TRPM3, and TRPM8). Given that pain and itch are pro-survival, evolutionarily-honed protective mechanisms, care has to be exercised when developing inhibitory/modulatory compounds targeting specific pain/itch-TRPs so that physiological protective mechanisms are not disabled to a degree that stimulus-mediated injury can occur. Such events have impeded the development of safe and effective TRPV1-modulating compounds and have diverted substantial resources. A beneficial outcome can be readily accomplished via simple dosing strategies, and also by incorporating medicinal chemistry design features during compound design and synthesis. Beyond clinical use, where compounds that target more than one channel might have a place and possibly have advantageous features, highly specific and high-potency compounds will be helpful in mechanistic discovery at the structure-function level.
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Affiliation(s)
- Carlene Moore
- Department of Neurology, Duke University Medical Center, Durham, NC, 27710, USA
| | - Rupali Gupta
- Department of Neurology, Duke University Medical Center, Durham, NC, 27710, USA
| | - Sven-Eric Jordt
- Department of Anesthesiology, Duke University Medical Center, Durham, NC, 27710, USA
| | - Yong Chen
- Department of Neurology, Duke University Medical Center, Durham, NC, 27710, USA.
| | - Wolfgang B Liedtke
- Department of Neurology, Duke University Medical Center, Durham, NC, 27710, USA.
- Department of Anesthesiology, Duke University Medical Center, Durham, NC, 27710, USA.
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46
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Kichko TI, Neuhuber W, Kobal G, Reeh PW. The roles of TRPV1, TRPA1 and TRPM8 channels in chemical and thermal sensitivity of the mouse oral mucosa. Eur J Neurosci 2018; 47:201-210. [PMID: 29247491 DOI: 10.1111/ejn.13799] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Revised: 11/28/2017] [Accepted: 12/05/2017] [Indexed: 12/24/2022]
Abstract
Spices in food and beverages and compounds in tobacco smoke interact with sensory irritant receptors of the transient receptor potential (TRP) cation channel family. TRPV1 (vanilloid type 1), TRPA1 (ankyrin 1) and TRPM8 (melastatin 8) not only elicit action potential signaling through trigeminal nerves, eventually evoking pungent or cooling sensations, but by their calcium conductance they also stimulate the release of calcitonin gene-related peptide (CGRP). This is measured as an index of neuronal activation to elucidate the chemo- and thermosensory transduction in the isolated mouse buccal mucosa of wild types and pertinent knockouts. We found that the lipophilic capsaicin, mustard oil and menthol effectively get access to the nerve endings below the multilayered squamous epithelium, while cigarette smoke and its gaseous phase were weakly effective releasing CGRP. The hydrophilic nicotine was ineffective unless applied unprotonated in alkaline (pH9) solution, activating TRPA1 and TRPV1. Also, mustard oil activated both these irritant receptors in millimolar but only TRPA1 in micromolar concentrations; in combination (1 mm) with heat (45 °C), it showed supraadditive, that is heat sensitizing, effects in TRPV1 and TRPA1 knockouts, suggesting action on an unknown heat-activated channel and mustard oil receptor. Menthol caused little CGRP release by itself, but in subliminal concentration (2 mm), it enabled a robust cold response that was absent in TRPM8-/- but retained in TRPA1-/- and strongly reduced by TRPM8 inhibitors. In conclusion, all three relevant irritant receptors are functionally expressed in the oral mucosa and play their specific roles in inducing neurogenic inflammation and sensitization to heat and cold.
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Affiliation(s)
- Tatjana I Kichko
- Institute of Physiology and Pathophysiology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Universitätsstrasse 17, Erlangen, 91056, Germany
| | - Winfried Neuhuber
- Institute of Anatomy I, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Gerd Kobal
- Altria Client Services Inc., Richmond, VA, USA
| | - Peter W Reeh
- Institute of Physiology and Pathophysiology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Universitätsstrasse 17, Erlangen, 91056, Germany
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47
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Jang Y, Cho PS, Yang YD, Hwang SW. Nociceptive Roles of TRPM2 Ion Channel in Pathologic Pain. Mol Neurobiol 2018; 55:6589-6600. [PMID: 29327205 DOI: 10.1007/s12035-017-0862-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2017] [Accepted: 12/21/2017] [Indexed: 12/18/2022]
Abstract
Pain is a protective mechanism that enables us to avoid potentially harmful environments. However, when pathologically persisted and aggravated under severely injured or inflamed conditions, pain often reduces the quality of life and thus is considered as a disease to eliminate. Inflammatory and/or neuropathic mechanisms may exaggerate interactions between damaged tissues and neural pathways for pain mediation. Similar mechanisms also promote the communication among cellular participants in synapses at spinal or higher levels, which may amplify nociceptive firing and subsequent signal transmission, deteriorating the pain sensation. In this pathology, important cellular players are afferent sensory neurons, peripheral immune cells, and spinal glial cells. Arising from damage of injury, overloaded interstitial and intracellular reactive oxygen species (ROS) and intracellular Ca2+ are key messengers in the development and maintenance of pathologic pain. Thus, an ROS-sensitive and Ca2+-permeable ion channel that is highly expressed in the participant cells might play a critical role in the pathogenesis. Transient receptor potential melastatin subtype 2 (TRPM2) is the unique molecule that satisfies all of the requirements: the sensitivity, permeability, and its expressing cells. Notable progress in delineating the role of TRPM2 in pain has been achieved during the past decade. In the present review, we summarize the important findings in the key cellular components that are involved in pathologic pain. This overview will help to understand TRPM2-mediated pain mechanisms and speculate therapeutic strategies by utilizing this updated information.
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Affiliation(s)
- Yongwoo Jang
- Department of Psychiatry and Program in Neuroscience, McLean Hospital, Harvard Medical School, Belmont, MA, 02478, USA
| | - Pyung Sun Cho
- Department of Biomedical Sciences and Department of Physiology, College of Medicine, Korea University, Seoul, 02841, South Korea
| | - Young Duk Yang
- Department of Pharmacy, College of Pharmacy, CHA University, Gyeonggi, 11160, South Korea.
| | - Sun Wook Hwang
- Department of Biomedical Sciences and Department of Physiology, College of Medicine, Korea University, Seoul, 02841, South Korea.
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48
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Abstract
Heat sensation, the ability to detect warm and noxious temperatures, is an ancient and indispensable sensory process. Noxious temperatures can have detrimental effects on the physiology and integrity of cells, and therefore, the detection of environmental hot temperatures is absolutely crucial for survival. Temperature-sensitive ion channels, which conduct ions in a highly temperature-dependent manner, have been put forward as molecular thermometers expressed at the endings of sensory neurons. In particular, several temperature-sensitive members of the transient receptor potential (TRP) superfamily of ion channels have been identified, and a multitude of in vivo studies have shown that the capsaicin-sensitive TRPV1 channel plays a key role as a noxious heat sensor. However, Trpv1-deficient mice display a residual heat sensitivity suggesting the existence of additional heat sensor(s). In this chapter, we provide evidence for the role of the non-selective calcium-permeable TRPM3 ion channel as an additional heat sensor that acts independently of TRPV1, and give an update of the modulation of this channel by various molecular mechanisms. Finally, we compare antagonists of TRPM3 to specific blockers of TRPV1 as potential analgesic drugs to treat pathological pain.
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49
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Wyatt A, Wartenberg P, Candlish M, Krasteva-Christ G, Flockerzi V, Boehm U. Genetic strategies to analyze primary TRP channel-expressing cells in mice. Cell Calcium 2017; 67:91-104. [DOI: 10.1016/j.ceca.2017.05.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Revised: 05/15/2017] [Accepted: 05/15/2017] [Indexed: 11/26/2022]
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50
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Dong P, Guo C, Huang S, Ma M, Liu Q, Luo W. TRPC3 Is Dispensable for β-Alanine Triggered Acute Itch. Sci Rep 2017; 7:13869. [PMID: 29066740 PMCID: PMC5654773 DOI: 10.1038/s41598-017-12770-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2017] [Accepted: 09/14/2017] [Indexed: 01/08/2023] Open
Abstract
The detection of pruritic (itchy) stimuli is mediated by a variety of receptors and channels expressed by primary sensory neurons. The G protein-coupled receptor (GPCR) MRGPRD is selectively expressed by a subset of mouse non-peptidergic nociceptors and functions as the molecular receptor for the itch-inducing chemical β-alanine. However, the channels responsible for generating electrical signals downstream of MRGPRD remain unclear. Here, we found that a member of the canonical TRP channel family, TRPC3, is highly expressed in MRGPRD+ non-peptidergic nociceptors, raising the possibility of whether TRPC3 functions as a downstream channel in the MRGPRD signaling pathway. We tested TrpC3 null mice for β-alanine induced itch, and found that these mice exhibit normal responses to β-alanine. At the cellular level, calcium influx triggered by β-alanine is also unchanged in cultured DRG neurons from TrpC3 null mice compared to wild type. Together, our results demonstrate that mouse TrpC3 is dispensable for β-alanine-induced acute itch.
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Affiliation(s)
- Peter Dong
- Department of Neuroscience, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Changxiong Guo
- Department of Anesthesiology and the Center for the Study of Itch, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Shengxiang Huang
- Department of Anesthesiology and the Center for the Study of Itch, Washington University School of Medicine, St. Louis, MO, 63110, USA.,Wuhan University, Wuhan, Hubei, China
| | - Minghong Ma
- Department of Neuroscience, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Qin Liu
- Department of Anesthesiology and the Center for the Study of Itch, Washington University School of Medicine, St. Louis, MO, 63110, USA.
| | - Wenqin Luo
- Department of Neuroscience, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA.
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