1
|
Foote AG, Tibbetts J, Bartley SM, Thibeault SL. Localization of TRPV3/4 and PIEZO1/2 sensory receptors in murine and human larynges. Laryngoscope Investig Otolaryngol 2022; 7:1963-1972. [PMID: 36544955 PMCID: PMC9764771 DOI: 10.1002/lio2.968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Revised: 09/17/2022] [Accepted: 10/23/2022] [Indexed: 12/24/2022] Open
Abstract
Objective The primary aim of this study was to identify expression of TRPV3 and TRPV4 chemoreceptors across perinatal and adult stages using a murine model with direct comparisons to human laryngeal mucosa. Our secondary aim was to establish novel cell expression patterns of mechanoreceptors PIEZO1 and PIEZO2 in human tissue samples. Study design In vivo. Methods We harvested murine laryngeal tissue to localize and describe TRPV3/4 endogenous protein expression patterns via immunofluorescence analyses across two developmental (E16.5, P0) and adult (6 weeks) timepoints. Additionally, we obtained a 60-year-old female larynx including the proximal trachea and esophagus to investigate TRPV3/4 and PIEZO1/2 protein expression patterns via immunofluorescence analyses for comparison to murine adult tissue. Results Murine TRPV3/4 expression was noted at E16.5 with epithelial cell colocalization to supraglottic regions of the arytenoids, aryepiglottic folds and epiglottis through to birth (P0), extending to the adult timepoint. Human TRPV3/4 protein expression was most evident to epithelium of the arytenoid region, with additional expression of TRPV3 and TRPV4 to proximal esophageal and tracheal epithelium, respectively. Human PIEZO1 expression was selective to differentiated, stratified squamous epithelia of the true vocal fold and esophagus, while PIEZO2 expression exhibited selectivity for intermediate and respiratory epithelia of the false vocal fold, ventricles, subglottis, arytenoid, and trachea. Conclusion Results exhibited expression of TRPV3/4 chemoreceptors in utero, suggesting their importance during fetal/neonatal stages. TRPV3/4 and PIEZO1/2 were noted to adult murine and human laryngeal epithelium. Data indicates conservation of chemosensory receptors across species given similar regional expression in both the murine and human larynx.
Collapse
Affiliation(s)
- Alexander G. Foote
- Division of Otolaryngology – Head and Neck SurgeryUniversity of Wisconsin – MadisonMadisonWisconsinUSA
| | - Julianna Tibbetts
- Division of Otolaryngology – Head and Neck SurgeryUniversity of Wisconsin – MadisonMadisonWisconsinUSA
| | - Stephanie M. Bartley
- Division of Otolaryngology – Head and Neck SurgeryUniversity of Wisconsin – MadisonMadisonWisconsinUSA
| | - Susan L. Thibeault
- Division of Otolaryngology – Head and Neck SurgeryUniversity of Wisconsin – MadisonMadisonWisconsinUSA
| |
Collapse
|
2
|
Long W, Johnson J, Kalyaanamoorthy S, Light P. TRPV1 channels as a newly identified target for vitamin D. Channels (Austin) 2021; 15:360-374. [PMID: 33825665 PMCID: PMC8032246 DOI: 10.1080/19336950.2021.1905248] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Revised: 03/15/2021] [Accepted: 03/15/2021] [Indexed: 11/23/2022] Open
Abstract
Vitamin D is known to elicit many biological effects in diverse tissue types and is thought to act almost exclusively upon its canonical receptor within the nucleus, leading to gene transcriptional changes and the subsequent cellular response. However, not all the observed effects of vitamin D can be attributed to this sole mechanism, and other cellular targets likely exist but remain to be identified. Our recent discovery that vitamin D is a partial agonist of the Transient Receptor Potential Vanilloid family 1 (TRPV1) channel may provide new insights as to how this important vitamin exerts its biological effects either independently or in addition to the nuclear vitamin D receptor. In this review, we discuss the literature surrounding this apparent discrepancy in vitamin D signaling and compare vitamin D with known TRPV1 ligands with respect to their binding to TRPV1. Furthermore, we provide evidence supporting the notion that this novel vitamin D/TRPV1 axis may explain some of the beneficial actions of this vitamin in disease states where TRPV1 expression and vitamin D deficiency are known to overlap. Finally, we discuss whether vitamin D may also act on other members of the TRP family of ion channels.
Collapse
Affiliation(s)
- Wentong Long
- Department of Pharmacology and the Alberta Diabetes Institute, University of Alberta, Edmonton, Canada
| | - Janyne Johnson
- Department of Pharmacology and the Alberta Diabetes Institute, University of Alberta, Edmonton, Canada
| | | | - Peter Light
- Department of Pharmacology and the Alberta Diabetes Institute, University of Alberta, Edmonton, Canada
| |
Collapse
|
3
|
Tang Z, Zhou J, Long H, Gao Y, Wang Q, Li X, Wang Y, Lai W, Jian F. Molecular mechanism in trigeminal nerve and treatment methods related to orthodontic pain. J Oral Rehabil 2021; 49:125-137. [PMID: 34586644 DOI: 10.1111/joor.13263] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 09/02/2021] [Accepted: 09/23/2021] [Indexed: 02/05/2023]
Abstract
BACKGROUND Orthodontic treatment is the main treatment approach for malocclusion. Orthodontic pain is an inevitable undesirable adverse reaction during orthodontic treatment. It is reported orthodontic pain has become one of the most common reason that patients withdraw from orthodontic treatment. Therefore, understanding the underlying mechanism and finding treatment of orthodontic pain are in urgent need. AIMS This article aims to sort out the mechanisms and treatments of orthodontic pain, hoping to provide some ideas for future orthodontic pain relief. MATERIALS Tooth movement will cause local inflammation. Certain inflammatory factors and cytokines stimulating the trigeminal nerve and further generating pain perception, as well as drugs and molecular targeted therapy blocking nerve conduction pathways, will be reviewed in this article. METHOD We review and summaries current studies related to molecular mechanisms and treatment approaches in orthodontic pain control. RESULTS Orthodontics pain related influencing factors and molecular mechanisms has been introduced. Commonly used clinical methods in orthodontic pain control has been evaluated. DISCUSSION With the clarification of more molecular mechanisms, the direction of orthodontic pain treatment will shift to targeted drugs.
Collapse
Affiliation(s)
- Ziwei Tang
- State Key Laboratory of Oral Diseases, Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Jiawei Zhou
- State Key Laboratory of Oral Diseases, Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Hu Long
- State Key Laboratory of Oral Diseases, Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Yanzi Gao
- State Key Laboratory of Oral Diseases, Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Qingxuan Wang
- State Key Laboratory of Oral Diseases, Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Xiaolong Li
- State Key Laboratory of Oral Diseases, Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Yan Wang
- State Key Laboratory of Oral Diseases, Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Wenli Lai
- State Key Laboratory of Oral Diseases, Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Fan Jian
- State Key Laboratory of Oral Diseases, Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| |
Collapse
|
4
|
Long W, Fatehi M, Soni S, Panigrahi R, Philippaert K, Yu Y, Kelly R, Boonen B, Barr A, Golec D, Campbell SA, Ondrusova K, Hubert M, Baldwin T, Lemieux MJ, Light PE. Vitamin D is an endogenous partial agonist of the transient receptor potential vanilloid 1 channel. J Physiol 2020; 598:4321-4338. [PMID: 32721035 PMCID: PMC7589233 DOI: 10.1113/jp279961] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Accepted: 07/20/2020] [Indexed: 12/30/2022] Open
Abstract
KEY POINTS 25-Hydroxyvitamin D (25OHD) is a partial agonist of TRPV1 whereby 25OHD can weakly activate TRPV1 yet antagonize the stimulatory effects of the full TRPV1 agonists capsaicin and oleoyl dopamine. 25OHD binds to TRPV1 within the same vanilloid binding pocket as capsaicin. 25OHD inhibits the potentiating effects of PKC-mediated TRPV1 activity. 25OHD reduces T-cell activation and trigeminal neuron calcium signalling mediated by TRPV1 activity. These results provide evidence that TRPV1 is a novel receptor for the biological actions of vitamin D in addition to the well-documented effects of vitamin D upon the nuclear vitamin D receptor. The results may have important implications for our current understanding of certain diseases where TRPV1 and vitamin D deficiency have been implicated, such as chronic pain and autoimmune diseases, such as type 1 diabetes. ABSTRACT The capsaicin receptor TRPV1 plays an important role in nociception, inflammation and immunity and its activity is regulated by exogenous and endogenous lipophilic ligands. As vitamin D is lipophilic and involved in similar biological processes as TRPV1, we hypothesized that it directly regulates TRPV1 activity and function. Our calcium imaging and electrophysiological data demonstrate that vitamin D (25-hydroxyvitamin D (25OHD) and 1,25-hydroxyvitamin D (1,25OHD)) can weakly activate TRPV1 at physiologically relevant concentrations (100 nM). Furthermore, both 25OHD and 1,25OHD can inhibit capsaicin-induced TRPV1 activity (IC50 = 34.3 ± 0.2 and 11.5 ± 0.9 nM, respectively), but not pH-induced TRPV1 activity, suggesting that vitamin D interacts with TRPV1 in the same region as the TRPV1 agonist capsaicin. This hypothesis is supported by our in silico TRPV1 structural modelling studies, which place 25OHD in the same binding region as capsaicin. 25OHD also attenuates PKC-dependent TRPV1 potentiation via interactions with a known PKC phospho-acceptor residue in TRPV1. To provide evidence for a physiological role for the interaction of vitamin D with TRPV1, we employed two different cellular models known to express TRPV1: mouse CD4+ T-cells and trigeminal neurons. Our results indicate that 25OHD reduces TRPV1-induced cytokine release from T-cells and capsaicin-induced calcium activity in trigeminal neurons. In summary, we provide evidence that vitamin D is a novel endogenous regulator of TRPV1 channel activity that may play an important physiological role in addition to its known effects through the canonical nuclear vitamin D receptor pathway.
Collapse
Affiliation(s)
- Wentong Long
- Alberta Diabetes InstituteFaculty of Medicine & DentistryUniversity of AlbertaEdmontonCanada
- Departments of PharmacologyFaculty of Medicine & DentistryUniversity of AlbertaEdmontonCanada
| | - Mohammad Fatehi
- Alberta Diabetes InstituteFaculty of Medicine & DentistryUniversity of AlbertaEdmontonCanada
- Departments of PharmacologyFaculty of Medicine & DentistryUniversity of AlbertaEdmontonCanada
| | - Shubham Soni
- Alberta Diabetes InstituteFaculty of Medicine & DentistryUniversity of AlbertaEdmontonCanada
| | - Rashmi Panigrahi
- BiochemistryFaculty of Medicine & DentistryUniversity of AlbertaEdmontonCanada
| | - Koenraad Philippaert
- Alberta Diabetes InstituteFaculty of Medicine & DentistryUniversity of AlbertaEdmontonCanada
- Departments of PharmacologyFaculty of Medicine & DentistryUniversity of AlbertaEdmontonCanada
- Laboratory for Ion Channel ResearchDepartment of Cellular and Molecular MedicineVIB Center for Brain and Disease ResearchKU LeuvenLeuvenBelgium
| | - Yi Yu
- Alberta Diabetes InstituteFaculty of Medicine & DentistryUniversity of AlbertaEdmontonCanada
- Departments of PharmacologyFaculty of Medicine & DentistryUniversity of AlbertaEdmontonCanada
| | - Rees Kelly
- Medical Microbiology & ImmunologyFaculty of Medicine & DentistryUniversity of AlbertaEdmontonCanada
| | - Brett Boonen
- Laboratory for Ion Channel ResearchDepartment of Cellular and Molecular MedicineVIB Center for Brain and Disease ResearchKU LeuvenLeuvenBelgium
| | - Amy Barr
- Alberta Diabetes InstituteFaculty of Medicine & DentistryUniversity of AlbertaEdmontonCanada
- Departments of PharmacologyFaculty of Medicine & DentistryUniversity of AlbertaEdmontonCanada
| | - Dominic Golec
- Alberta Diabetes InstituteFaculty of Medicine & DentistryUniversity of AlbertaEdmontonCanada
- Departments of PharmacologyFaculty of Medicine & DentistryUniversity of AlbertaEdmontonCanada
| | - Scott A. Campbell
- Alberta Diabetes InstituteFaculty of Medicine & DentistryUniversity of AlbertaEdmontonCanada
- Departments of PharmacologyFaculty of Medicine & DentistryUniversity of AlbertaEdmontonCanada
| | - Katarina Ondrusova
- Alberta Diabetes InstituteFaculty of Medicine & DentistryUniversity of AlbertaEdmontonCanada
- Departments of PharmacologyFaculty of Medicine & DentistryUniversity of AlbertaEdmontonCanada
| | - Matt Hubert
- Alberta Diabetes InstituteFaculty of Medicine & DentistryUniversity of AlbertaEdmontonCanada
- Departments of PharmacologyFaculty of Medicine & DentistryUniversity of AlbertaEdmontonCanada
| | - Troy Baldwin
- Medical Microbiology & ImmunologyFaculty of Medicine & DentistryUniversity of AlbertaEdmontonCanada
| | - M. Joanne Lemieux
- BiochemistryFaculty of Medicine & DentistryUniversity of AlbertaEdmontonCanada
| | - Peter E. Light
- Alberta Diabetes InstituteFaculty of Medicine & DentistryUniversity of AlbertaEdmontonCanada
- Departments of PharmacologyFaculty of Medicine & DentistryUniversity of AlbertaEdmontonCanada
| |
Collapse
|
5
|
Roh J, Hwang SM, Lee SH, Lee K, Kim YH, Park CK. Functional Expression of Piezo1 in Dorsal Root Ganglion (DRG) Neurons. Int J Mol Sci 2020; 21:ijms21113834. [PMID: 32481599 PMCID: PMC7313462 DOI: 10.3390/ijms21113834] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Revised: 05/25/2020] [Accepted: 05/27/2020] [Indexed: 12/13/2022] Open
Abstract
Piezo channels are mechanosensitive ion channels. Piezo1 is primarily expressed in nonsensory tissues, whereas Piezo2 is predominantly found in sensory tissues, including dorsal root ganglion (DRG) neurons. However, a recent study demonstrated the intracellular calcium response to Yoda1, a selective Piezo1 agonist, in trigeminal ganglion (TG) neurons. Herein, we investigate the expression of Piezo1 mRNA and protein in mouse and human DRG neurons and the activation of Piezo1 via calcium influx by Yoda1. Yoda1 induces inward currents mainly in small- (< 25 μm) and medium-sized (25-35 μm) mouse DRG neurons. The Yoda1-induced Ca2+ response is inhibited by cationic channel blocker, ruthenium red and cationic mechanosensitive channel blocker, GsMTx4. To confirm the specific inhibition of Piezo1, we performed an adeno-associated virus serotype 2/5 (AAV2/5)-mediated delivery of short hairpin RNA (shRNA) into mouse DRG neurons. AAV2/5 transfection downregulates piezo1 mRNA expression and reduces Ca2+ response by Yoda1. Piezo1 also shows physiological functions with transient receptor potential vanilloid 1 (TRPV1) in the same DRG neurons and is regulated by the activation of TRPV1 in mouse DRG sensory neurons. Overall, we found that Piezo1 has physiological functions in DRG neurons and that TRPV1 activation inhibits an inward current induced by Yoda1.
Collapse
Affiliation(s)
- Jueun Roh
- Gachon Pain Center and Department of Physiology, College of Medicine, Gachon University, Incheon 21999, Korea; (J.R.); (S.-M.H.); (K.L.)
| | - Sung-Min Hwang
- Gachon Pain Center and Department of Physiology, College of Medicine, Gachon University, Incheon 21999, Korea; (J.R.); (S.-M.H.); (K.L.)
| | - Sun-Ho Lee
- Department of Neurosurgery, Spine tumor center, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul 06351, Korea;
| | - Kihwan Lee
- Gachon Pain Center and Department of Physiology, College of Medicine, Gachon University, Incheon 21999, Korea; (J.R.); (S.-M.H.); (K.L.)
| | - Yong Ho Kim
- Gachon Pain Center and Department of Physiology, College of Medicine, Gachon University, Incheon 21999, Korea; (J.R.); (S.-M.H.); (K.L.)
- Correspondence: (Y.H.K.); (C.-K.P.); Tel.: +82-32-899-6691 (Y.H.K.); +82-32-899-6692 (C.-K.P.)
| | - Chul-Kyu Park
- Gachon Pain Center and Department of Physiology, College of Medicine, Gachon University, Incheon 21999, Korea; (J.R.); (S.-M.H.); (K.L.)
- Correspondence: (Y.H.K.); (C.-K.P.); Tel.: +82-32-899-6691 (Y.H.K.); +82-32-899-6692 (C.-K.P.)
| |
Collapse
|
6
|
Singh AK, Kumar S, Vinayak M. Recent development in antihyperalgesic effect of phytochemicals: anti-inflammatory and neuro-modulatory actions. Inflamm Res 2018; 67:633-654. [PMID: 29767332 DOI: 10.1007/s00011-018-1156-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 05/04/2018] [Accepted: 05/08/2018] [Indexed: 02/08/2023] Open
Abstract
INTRODUCTION Pain is an unpleasant sensation triggered by noxious stimulation. It is one of the most prevalent conditions, limiting productivity and diminishing quality of life. Non steroidal anti inflammatory drugs (NSAIDs) are widely used as pain relievers in present day practice as pain is mostly initiated due to inflammation. However, due to potentially serious side effects, long term use of these antihyperalgesic drugs raises concern. Therefore there is a demand to search novel medicines with least side effects. Herbal products have been used for centuries to reduce pain and inflammation, and phytochemicals are known to cause fewer side effects. However, identification of active phytochemicals of herbal medicines and clear understanding of the molecular mechanism of their action is needed for clinical acceptance. MATERIALS AND METHODS In this review, we have briefly discussed the cellular and molecular changes during hyperalgesia via inflammatory mediators and neuro-modulatory action involved therein. The review includes 54 recently reported phytochemicals with antihyperalgesic action, as per the literature available with PubMed, Google Scholar and Scopus. CONCLUSION Compounds of high interest as potential antihyperalgesic agents are: curcumin, resveratrol, capsaicin, quercetin, eugenol, naringenin and epigallocatechin gallate (EGCG). Current knowledge about molecular targets of pain and their regulation by these phytochemicals is elaborated and the scope of further research is discussed.
Collapse
Affiliation(s)
- Ajeet Kumar Singh
- Department of Zoology, Biochemistry and Molecular Biology Laboratory, Institute of Science, Banaras Hindu University, Varanasi, 221005, India.,Department of Zoology, CMP Degree College, University of Allahabad, Allahabad, 211002, India
| | - Sanjay Kumar
- Department of Zoology, Biochemistry and Molecular Biology Laboratory, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - Manjula Vinayak
- Department of Zoology, Biochemistry and Molecular Biology Laboratory, Institute of Science, Banaras Hindu University, Varanasi, 221005, India.
| |
Collapse
|
7
|
Shepherd AJ, Mickle AD, Kadunganattil S, Hu H, Mohapatra DP. Parathyroid Hormone-Related Peptide Elicits Peripheral TRPV1-dependent Mechanical Hypersensitivity. Front Cell Neurosci 2018; 12:38. [PMID: 29497363 PMCID: PMC5818411 DOI: 10.3389/fncel.2018.00038] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2017] [Accepted: 01/31/2018] [Indexed: 02/04/2023] Open
Abstract
Bone metastasis in breast, prostate and lung cancers often leads to chronic pain, which is poorly managed by existing analgesics. The neurobiological mechanisms that underlie chronic pain associated with bone-metastasized cancers are not well understood, but sensitization of peripheral nociceptors by tumor microenvironment factors has been demonstrated to be important. Parathyroid hormone-related peptide (PTHrP) is highly expressed in bone-metastasized breast and prostate cancers, and is critical to growth and proliferation of these tumors in the bone tumor microenvironment. Previous studies have suggested that PTHrP could sensitize nociceptive sensory neurons, resulting in peripheral pain hypersensitivity. In this study, we found that PTHrP induces both heat and mechanical hypersensitivity, that are dependent on the pain-transducing transient receptor potential channel family vanilloid, member-1 (TRPV1), but not the mechano-transducing TRPV4 and TRPA1 ion channels. Functional ratiometric Ca2+ imaging and voltage-clamp electrophysiological analysis of cultured mouse DRG neurons show significant potentiation of TRPV1, but not TRPA1 or TRPV4 channel activation by PTHrP. Interestingly, PTHrP exposure led to the slow and sustained activation of TRPV1, in the absence of any exogenous channel agonist, and is dependent on the expression of the type-1 parathyroid hormone receptor (PTH1), as well as on downstream phosphorylation of the channel by protein kinase C (PKC). Accordingly, local administration of specific small-molecule antagonists of TRPV1 to mouse hindpaws after the development of PTHrP-induced mechanical hypersensitivity led to its significant attenuation. Collectively, our findings suggest that PTHrP/PTH1-mediated flow activation of TRPV1 channel contributes at least in part to the development and maintenance of peripheral mechanical pain hypersensitivity, and could therefore constitute a mechanism for nociceptor sensitization in the context of metastatic bone cancer pain.
Collapse
Affiliation(s)
- Andrew J Shepherd
- Department of Pharmacology, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, IA, United States.,Washington University Pain Center, Department of Anesthesiology, Washington University School of Medicine in St. Louis, St. Louis, MO, United States
| | - Aaron D Mickle
- Department of Pharmacology, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, IA, United States.,Washington University Pain Center, Department of Anesthesiology, Washington University School of Medicine in St. Louis, St. Louis, MO, United States
| | - Suraj Kadunganattil
- Washington University Pain Center, Department of Anesthesiology, Washington University School of Medicine in St. Louis, St. Louis, MO, United States
| | - Hongzhen Hu
- Washington University Pain Center, Department of Anesthesiology, Washington University School of Medicine in St. Louis, St. Louis, MO, United States.,Center for the Study of Itch, Department of Anesthesiology, Washington University School of Medicine in St. Louis, St. Louis, MO, United States.,Center for Investigation on Membrane Excitable Diseases, Washington University School of Medicine in St. Louis, St. Louis, MO, United States
| | - Durga P Mohapatra
- Department of Pharmacology, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, IA, United States.,Washington University Pain Center, Department of Anesthesiology, Washington University School of Medicine in St. Louis, St. Louis, MO, United States.,Center for the Study of Itch, Department of Anesthesiology, Washington University School of Medicine in St. Louis, St. Louis, MO, United States.,Center for Investigation on Membrane Excitable Diseases, Washington University School of Medicine in St. Louis, St. Louis, MO, United States
| |
Collapse
|