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Roman K, Hall C, Schaeffer AJ, Thumbikat P. TRPV1 in experimental autoimmune prostatitis. Prostate 2020; 80:28-37. [PMID: 31573117 PMCID: PMC7313375 DOI: 10.1002/pros.23913] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Accepted: 09/18/2019] [Indexed: 12/27/2022]
Abstract
BACKGROUND Chronic prostatitis/chronic pelvic pain syndrome (CP/CPPS) is a disorder that is characterized by persistent pelvic pain in men of any age. Although several studies suggest that the transient receptor potential vanilloid 1 (TRPV1) channel is involved in various pathways of chronic pain, the TRPV1 channel has not been implicated in chronic pelvic pain associated with CP/CPPS. METHODS Male C57BL/6J (B6) and TRPV1 knockout (TRPV1 KO) mice (5-7 weeks old) were used to study the development of pelvic allodynia in a murine model of CP/CPPS called experimental autoimmune prostatitis (EAP). The prostate lobes, dorsal root ganglia (DRG), and spinal cord were excised at day 20. The prostate lobes were assessed for inflammation, TRPV1 expression, and mast cell activity. DRG and spinal cord, between the L6-S4 regions, were analyzed to determine the levels of phosphorylated ERK1/2 (p-ERK 1/2). To examine the therapeutic potential of TRPV1, B6 mice with EAP received intraurethral infusion of a TRPV1 antagonist at day 20 (repeated every 2 days) and pelvic pain was evaluated at days 20, 25, 30, and 35. RESULTS Our data showed that B6 mice with EAP developed pelvic tactile allodynia at days 7, 14, and 20. In contrast, TRPV1 KO mice with EAP do not develop pelvic tactile allodynia at any time point. Although we observed no change in the levels of TRPV1 protein expression in the prostate from B6 mice with EAP, there was evidence of significant inflammation and elevated mast cell activation. Interestingly, the prostate from TRPV1 KO mice with EAP showed a lack of mast cell activation despite evidence of prostate inflammation. Next, we observed a significant increase of p-ERK1/2 in the DRG and spinal cord from B6 mice with EAP; however, p-ERK1/2 expression was unaltered in TRPV1 KO mice with EAP. Finally, we confirmed that intraurethral administration of a TRPV1 antagonist peptide reduced pelvic tactile allodynia in B6 mice with EAP after day 20. CONCLUSIONS We demonstrated that in a murine model of CP/CPPS, the TRPV1 channel is key to persistent pelvic tactile allodynia and blocking TRPV1 in the prostate may be a promising strategy to quell chronic pelvic pain.
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Affiliation(s)
- Kenny Roman
- Department of Urology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Christel Hall
- Department of Urology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Anthony J. Schaeffer
- Department of Urology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Praveen Thumbikat
- Department of Urology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
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Srour J, Bengel J, Linden T, Jovanovic Z, Roggenkamp D, Reinholz M, Rothenberger C, Neufang G, Wollenberg A. Efficacy of a skin care cream with TRPV1 inhibitor 4‐t‐butylcyclohexanol in the topical therapy of perioral dermatitis. J Cosmet Dermatol 2019; 19:1409-1414. [DOI: 10.1111/jocd.13175] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2019] [Accepted: 09/13/2019] [Indexed: 11/28/2022]
Affiliation(s)
- Jerome Srour
- Department of Dermatology and Allergy Ludwig‐Maximilian University Munich Germany
| | - Julia Bengel
- Department of Dermatology and Allergy Ludwig‐Maximilian University Munich Germany
| | - Teresa Linden
- Department of Dermatology and Allergy Ludwig‐Maximilian University Munich Germany
| | | | | | - Markus Reinholz
- Department of Dermatology and Allergy Ludwig‐Maximilian University Munich Germany
| | | | | | - Andreas Wollenberg
- Department of Dermatology and Allergy Ludwig‐Maximilian University Munich Germany
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53
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Siiskonen H, Harvima I. Mast Cells and Sensory Nerves Contribute to Neurogenic Inflammation and Pruritus in Chronic Skin Inflammation. Front Cell Neurosci 2019; 13:422. [PMID: 31619965 PMCID: PMC6759746 DOI: 10.3389/fncel.2019.00422] [Citation(s) in RCA: 86] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Accepted: 09/03/2019] [Indexed: 12/12/2022] Open
Abstract
The intimate interaction between mast cells and sensory nerves can be illustrated by the wheal and surrounding flare in an urticarial reaction in human skin. This reaction is typically associated with an intense itch at the reaction site. Upon activation, cutaneous mast cells release powerful mediators, such as histamine, tryptase, cytokines, and growth factors that can directly stimulate corresponding receptors on itch-mediating sensory nerves. These include, e.g., H1- and H4-receptors, protease-activated receptor-2, IL-31 receptor, and the high-affinity receptor of nerve growth factor (TrkA). On the other hand, sensory nerves can release neuropeptides, including substance P and vasoactive intestinal peptide, that are able to stimulate mast cells to release mediators leading to potentiation of the reciprocal interaction, inflammation, and itch. Even though mast cells are well recognized for their role in allergic skin whealing and urticaria, increasing evidence supports the reciprocal function between mast cells and sensory nerves in neurogenic inflammation in chronic skin diseases, such as psoriasis and atopic dermatitis, which are often characterized by distressing itch, and exacerbated by psychological stress. Increased morphological contacts between mast cells and sensory nerves in the lesional skin in psoriasis and atopic dermatitis as well as experimental models in mice and rats support the essential role for mast cell-sensory nerve communication in consequent pruritus. Therefore, we summarize here the present literature pointing to a close association between mast cells and sensory nerves in pruritic skin diseases as well as review the essential supporting findings on pruritic models in mice and rats.
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Affiliation(s)
- Hanna Siiskonen
- Department of Dermatology, Kuopio University Hospital and University of Eastern Finland, Kuopio, Finland
| | - Ilkka Harvima
- Department of Dermatology, Kuopio University Hospital and University of Eastern Finland, Kuopio, Finland
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54
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The Neuromodulatory Effect of Antipruritic Treatment of Chronic Prurigo. Dermatol Ther (Heidelb) 2019; 9:613-622. [PMID: 31512177 PMCID: PMC6828989 DOI: 10.1007/s13555-019-00321-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Indexed: 12/05/2022] Open
Abstract
Chronic prurigo is an extremely severe pruritic skin disease which presents with multiple, hyperkeratotic and erosive papules, nodules and/or plaques. Patients with this high-burden disease require effective therapies, but effective treatments with regulatory agency approval are currently lacking. Deeper understanding of the pathophysiology suggests that hypersensitive nerves play an important role in the development of chronic prurigo. Accordingly, a treatment with neuroactive substances which modulate hypersensitivity seems promising. Here, we review antipruritic therapies with a neuromodulative effect. Current treatment options, such as topical capsaicin or opioid-receptor modulators, and also novel and future treatment regimens, such as, for example, interleukin-31 antibodies and neurokinin-1 receptor antagonists, are discussed.
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55
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Schmidberger M, Nikolic I, Pantelic I, Lunter D. Optimization of Rheological Behaviour and Skin Penetration of Thermogelling Emulsions with Enhanced Substantivity for Potential Application in Treatment of Chronic Skin Diseases. Pharmaceutics 2019; 11:E361. [PMID: 31344864 PMCID: PMC6723268 DOI: 10.3390/pharmaceutics11080361] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Revised: 07/17/2019] [Accepted: 07/22/2019] [Indexed: 01/06/2023] Open
Abstract
Topical formulations are an important pillar in the therapy of skin diseases. Nevertheless, after application the formulation will be exposed to environmental effects. Contact with other surfaces will reduce the available amount of formulation and drug substance. The resulting consequences for therapy range from reduced effects to therapeutic failure. The removed active ingredient also contaminates patients' environment. The aim of this work was to develop preparations that remain at the application site. These will enhance safety and efficiency and thus improve of skin disease therapies. Therefore, we developed polymer-stabilised emulsions that show thermogelling properties. Emulsions with different methyl cellulose concentrations and macrogols of different molecular weights were investigated. The dispersed phase consisted of nonivamide as the active pharmaceutical ingredient, dissolved in medium-chain triglycerides. Rheological properties, droplet size, substantivity and ex vivo penetration experiments were performed to characterise the developed formulations. Droplet size and rheological parameters were affected by the composition of the preparations. The tested formulations showed benefits in their substantivity compared to a conventional semi-solid cream. We found a residual amount of up to 100% at the application site. The drug levels in viable epidermis were in a therapeutic range. The developed emulsions are a promising vehicle to improve therapy for chronic skin diseases.
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Affiliation(s)
- Markus Schmidberger
- Department of Pharmaceutical Technology, Eberhard Karls University, Auf der Morgenstelle 8, 72076 Tuebingen, Germany
| | - Ines Nikolic
- Department of Pharmaceutical Technology and Cosmetology, Faculty of Pharmacy, University of Belgrade, 450 Vojvode Stepe Street, 11221 Belgrade, Serbia
| | - Ivana Pantelic
- Department of Pharmaceutical Technology and Cosmetology, Faculty of Pharmacy, University of Belgrade, 450 Vojvode Stepe Street, 11221 Belgrade, Serbia
| | - Dominique Lunter
- Department of Pharmaceutical Technology, Eberhard Karls University, Auf der Morgenstelle 8, 72076 Tuebingen, Germany.
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56
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Hawro T, Lehmann S, Deuring E, Weller K, Altrichter S, Church M, Maurer M, Metz M. Comparison of pruritus and sensory qualities induced by capsaicin, histamine and cowhage. J Eur Acad Dermatol Venereol 2019; 33:1755-1761. [DOI: 10.1111/jdv.15743] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Accepted: 05/29/2019] [Indexed: 11/29/2022]
Affiliation(s)
- T. Hawro
- Department of Dermatology and Allergy Charité – Universitätsmedizin Berlin Berlin Germany
| | - S. Lehmann
- Department of Dermatology and Allergy Charité – Universitätsmedizin Berlin Berlin Germany
| | - E. Deuring
- Department of Dermatology and Allergy Charité – Universitätsmedizin Berlin Berlin Germany
| | - K. Weller
- Department of Dermatology and Allergy Charité – Universitätsmedizin Berlin Berlin Germany
| | - S. Altrichter
- Department of Dermatology and Allergy Charité – Universitätsmedizin Berlin Berlin Germany
| | - M.K. Church
- Department of Dermatology and Allergy Charité – Universitätsmedizin Berlin Berlin Germany
| | - M. Maurer
- Department of Dermatology and Allergy Charité – Universitätsmedizin Berlin Berlin Germany
| | - M. Metz
- Department of Dermatology and Allergy Charité – Universitätsmedizin Berlin Berlin Germany
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57
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Scheau C, Badarau IA, Caruntu C, Mihai GL, Didilescu AC, Constantin C, Neagu M. Capsaicin: Effects on the Pathogenesis of Hepatocellular Carcinoma. Molecules 2019; 24:E2350. [PMID: 31247901 PMCID: PMC6651067 DOI: 10.3390/molecules24132350] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Revised: 06/21/2019] [Accepted: 06/24/2019] [Indexed: 12/22/2022] Open
Abstract
Hepatocellular carcinoma (HCC) is one of the most frequent cancers, and to date, there have been very few drugs available that can improve survival, the most well-known being sorafenib. The pathogenesis of HCC is complex, involving multiple processes including abnormal cell and tissue regeneration, angiogenesis, genomic instability, cellular proliferation, and signaling pathway alterations. Capsaicin is a substance that holds increasingly high interest and is studied as a therapeutic option in a wide array of diseases. Several studies have investigated capsaicin roles in various stages of HCC oncogenesis. This paper aims to thoroughly detail the available information on the individual effects of capsaicin on the cellular mechanisms and pathways involved in HCC development, as well as investigate their possible cooperation and interferences. The synergistic antitumor effects of capsaicin and sorafenib are also addressed.
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Affiliation(s)
- Cristian Scheau
- Department of Physiology, Carol Davila University of Medicine and Pharmacy, 050474 Bucharest, Romania
| | - Ioana Anca Badarau
- Department of Physiology, Carol Davila University of Medicine and Pharmacy, 050474 Bucharest, Romania.
| | - Constantin Caruntu
- Department of Physiology, Carol Davila University of Medicine and Pharmacy, 050474 Bucharest, Romania.
- Department of Dermatology, Prof. N.C. Paulescu National Institute of Diabetes, Nutrition and Metabolic Diseases, 011233 Bucharest, Romania.
| | - Gratiela Livia Mihai
- Department of Physiology, Carol Davila University of Medicine and Pharmacy, 050474 Bucharest, Romania
| | - Andreea Cristiana Didilescu
- Department of Embryology, Faculty of Dental Medicine, Carol Davila University of Medicine and Pharmacy, 050474 Bucharest, Romania
| | - Carolina Constantin
- Immunology Department, Victor Babes National Institute of Pathology, 050096 Bucharest, Romania
- Department of Pathology, Colentina University Hospital, 020125 Bucharest, Romania
| | - Monica Neagu
- Immunology Department, Victor Babes National Institute of Pathology, 050096 Bucharest, Romania
- Department of Pathology, Colentina University Hospital, 020125 Bucharest, Romania
- Faculty of Biology, University of Bucharest, 76201 Bucharest, Romania
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58
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Abstract
Itch treatment is a major challenge in the dermatologist’s practice. We encounter patients suffering from pruritus on a regular basis, and often lack diverse treatment options to adequately respond to the patients’ needs. In the last 20 years, novel pathways have been investigated that were beyond the scope of histamine. Although most did not result in a molecule available on the Canadian market, it is interesting and important as health care providers to stay up to date with new neuronal pathways involved in itch transmission and potential new therapeutic options. In this review, we will discuss pathways targeted in new topical treatments such as antagonist of proteinase-activated receptor-2, the endocannabinoid system, neurotrophins and tropomyosin-related kinase A receptor, the transient receptor potential-vanilloid or transient receptor potential-melastatine ion channels. New systemic therapies are now focusing on antagonizing the neurokinin receptor, modulating the opioidergic system, or targeting itch cytokines such as interleukin-31.
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Affiliation(s)
| | - Laurent Misery
- Department of Dermatology, University Hospital Brest, France
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59
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Leon A, Rosen JD, Hashimoto T, Fostini AC, Paus R, Yosipovitch G. Itching for an answer: A review of potential mechanisms of scalp itch in psoriasis. Exp Dermatol 2019; 28:1397-1404. [DOI: 10.1111/exd.13947] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Revised: 04/03/2019] [Accepted: 04/08/2019] [Indexed: 01/01/2023]
Affiliation(s)
- Argentina Leon
- Dr Phillip Frost Department of Dermatology and Cutaneous Surgery Miami Itch Center Miller School of Medicine Miami Florida
| | - Jordan D. Rosen
- Dr Phillip Frost Department of Dermatology and Cutaneous Surgery Miami Itch Center Miller School of Medicine Miami Florida
| | - Takashi Hashimoto
- Dr Phillip Frost Department of Dermatology and Cutaneous Surgery Miami Itch Center Miller School of Medicine Miami Florida
| | - Anna C. Fostini
- Dr Phillip Frost Department of Dermatology and Cutaneous Surgery Miami Itch Center Miller School of Medicine Miami Florida
| | - Ralf Paus
- Dr Phillip Frost Department of Dermatology and Cutaneous Surgery Miami Itch Center Miller School of Medicine Miami Florida
| | - Gil Yosipovitch
- Dr Phillip Frost Department of Dermatology and Cutaneous Surgery Miami Itch Center Miller School of Medicine Miami Florida
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60
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Ilie MA, Caruntu C, Tampa M, Georgescu SR, Matei C, Negrei C, Ion RM, Constantin C, Neagu M, Boda D. Capsaicin: Physicochemical properties, cutaneous reactions and potential applications in painful and inflammatory conditions. Exp Ther Med 2019; 18:916-925. [PMID: 31384324 PMCID: PMC6639979 DOI: 10.3892/etm.2019.7513] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Accepted: 09/21/2018] [Indexed: 12/14/2022] Open
Abstract
Capsaicin is a natural protoalkaloid recognized as the main pungent component in hot peppers (Capsicum annuum L.). The capsaicin receptor is highly expressed in the unmyelinated type C nerve fibers originating from small diameter sensory neurons in dorsal root ganglia and cranial nerve ganglia correspondents. Capsaicin and related vanilloids have a variety of effects on primary sensory neurons function, from sensory neuron excitation characterized by local burning sensation and neurogenic inflammation, followed by conduction blockage accompanied by reversible ultrastructural changes of peripheral nociceptive endings (desensitization), going as far as irreversible degenerative changes (neurotoxicity). The main role in capsaicin-induced neurogenic inflammation relies on the capsaicin sensitive, small diameter primary sensory neurons, therefore its evaluation could be used as a diagnostic instrument in functional alterations of cutaneous sensory nerve fibers. Moreover, capsaicin-induced desensitization and neurotoxicity explain the analgesic/anti-nociceptive and anti-inflammatory effects of topical capsaicin and its potential use in the management of painful and inflammatory conditions. In this study, we describe the effects of capsaicin on neurogenic inflammation and nociception, as well as its potential diagnostic value and therapeutic impact in various conditions involving impairment of sensory nerve fibers.
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Affiliation(s)
- Mihaela Adriana Ilie
- Dermatology Research Laboratory, 'Carol Davila' University of Medicine and Pharmacy, Bucharest 020021, Romania.,Department of Biochemistry, 'Carol Davila' University of Medicine and Pharmacy, Bucharest 020021, Romania
| | - Constantin Caruntu
- Department of Physiology, 'Carol Davila' University of Medicine and Pharmacy, Bucharest 020021, Romania.,Department of Dermatology, 'Prof. N.C. Paulescu' National Institute of Diabetes, Nutrition and Metabolic Diseases, Bucharest 020475, Romania
| | - Mircea Tampa
- Department of Dermatology, 'Carol Davila' University of Medicine and Pharmacy, Bucharest 020021, Romania
| | - Simona-Roxana Georgescu
- Department of Dermatology, 'Carol Davila' University of Medicine and Pharmacy, Bucharest 020021, Romania
| | - Clara Matei
- Department of Dermatology, 'Carol Davila' University of Medicine and Pharmacy, Bucharest 020021, Romania
| | - Carolina Negrei
- Department of Toxicology, Faculty of Pharmacy, 'Carol Davila' University of Medicine and Pharmacy, Bucharest 020956, Romania
| | - Rodica-Mariana Ion
- The National Institute for Research and Development in Chemistry and Petrochemistry - ICECHIM, Bucharest 060021, Romania
| | - Carolina Constantin
- Department of Immunology, 'Victor Babes' National Institute of Pathology, Bucharest 050096, Romania.,Department of Pathology, Colentina Clinical Hospital, 020125 Bucharest, Romania
| | - Monica Neagu
- Department of Immunology, 'Victor Babes' National Institute of Pathology, Bucharest 050096, Romania.,Department of Pathology, Colentina Clinical Hospital, 020125 Bucharest, Romania.,Department of Biochemistry, Faculty of Biology, University of Bucharest, Bucharest 020125, Romania
| | - Daniel Boda
- Dermatology Research Laboratory, 'Carol Davila' University of Medicine and Pharmacy, Bucharest 020021, Romania.,Department of Dermatology, 'Prof. N.C. Paulescu' National Institute of Diabetes, Nutrition and Metabolic Diseases, Bucharest 020475, Romania
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61
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Milando R, Friedman A. Cannabinoids: Potential Role in Inflammatory and Neoplastic Skin Diseases. Am J Clin Dermatol 2019; 20:167-180. [PMID: 30542832 DOI: 10.1007/s40257-018-0410-5] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The endocannabinoid system is a complex and nearly ubiquitous network of endogenous ligands, enzymes, and receptors that can also be stimulated by exogenous compounds such as those derived from the marijuana plant, Cannabis sativa. Recent data have shown that the endocannabinoid system is fully functional in the skin and is responsible for maintaining many aspects of skin homeostasis, such as proliferation, differentiation, and release of inflammatory mediators. Because of its role in regulating these key processes, the endocannabinoid system has been studied for its modulating effects on both inflammatory disorders of the skin and skin cancer. Although legal restrictions on marijuana as a Schedule I drug in the USA have made studying cannabinoid compounds unfavorable, an increasing number of studies and clinical trials have focused on the therapeutic uses of cannabinoids. This review seeks to summarize the current, and rapidly expanding field of research on the broad potential uses of cannabinoids in inflammatory and neoplastic diseases of the skin.
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Affiliation(s)
- Rose Milando
- George Washington University School of Medicine and Health Sciences, Washington, DC, USA
| | - Adam Friedman
- George Washington University School of Medicine and Health Sciences, Washington, DC, USA.
- Department of Dermatology, The George Washington University Medical Faculty Associates, 2150 Pennsylvania Avenue NW, Suite 2B-430, Washington, DC, 20037, USA.
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62
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Wang LH, Huang W, Wei D, Ding DG, Liu YR, Wang JJ, Zhou ZY. Mechanisms of Acupuncture Therapy for Simple Obesity: An Evidence-Based Review of Clinical and Animal Studies on Simple Obesity. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE : ECAM 2019; 2019:5796381. [PMID: 30854010 PMCID: PMC6378065 DOI: 10.1155/2019/5796381] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Accepted: 12/25/2018] [Indexed: 12/15/2022]
Abstract
Simple obesity is a worldwide epidemic associated with rapidly growing morbidity and mortality which imposes an enormous burden on individual and public health. As a part of Traditional Chinese Medicine (TCM), acupuncture has shown the positive efficacy in the management of simple obesity. In this article, we comprehensively review the clinical and animal studies that demonstrated the potential mechanisms of acupuncture treatment for simple obesity. Clinical studies suggested that acupuncture regulates endocrine system, promotes digestion, attenuates oxidative stress, and modulates relevant molecules of metabolism in patients of simple obesity. Evidence from laboratory indicated that acupuncture regulates lipid metabolism, modulates inflammatory responses, and promotes white adipose tissue browning. Acupuncture also suppresses appetite through regulating appetite regulatory hormones and the downstream signaling pathway. The evidence from clinical and animal studies indicates that acupuncture induces multifaceted regulation through complex mechanisms and moreover a single factor may not be enough to explain the beneficial effects against simple obesity.
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Affiliation(s)
- Li-Hua Wang
- College of Acupuncture and Orthopedics, Hubei University of Chinese Medicine/Hubei Provincial Collaborative Innovation Center of Preventive Treatment by Acupuncture and Moxibustion, Wuhan, China
| | - Wei Huang
- College of Acupuncture and Orthopedics, Hubei University of Chinese Medicine/Hubei Provincial Collaborative Innovation Center of Preventive Treatment by Acupuncture and Moxibustion, Wuhan, China
- Department of Acupuncture, Hubei Provincial Hospital of Traditional Chinese Medicine, Wuhan, China
| | - Dan Wei
- Department of Acupuncture, Hubei Provincial Hospital of Traditional Chinese Medicine, Wuhan, China
| | - De-Guang Ding
- Department of Acupuncture, Hubei Provincial Hospital of Traditional Chinese Medicine, Wuhan, China
| | - Yi-Ran Liu
- Department of Acupuncture, Hubei Provincial Hospital of Traditional Chinese Medicine, Wuhan, China
| | - Jia-Jie Wang
- Department of Acupuncture, Hubei Provincial Hospital of Traditional Chinese Medicine, Wuhan, China
| | - Zhong-Yu Zhou
- Department of Acupuncture, Hubei Provincial Hospital of Traditional Chinese Medicine, Wuhan, China
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63
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Abstract
Mast cells are best recognized for their role in allergy and anaphylaxis, but increasing evidence supports their role in neurogenic inflammation leading to pain and itch. Mast cells act as a "power house" by releasing algogenic and pruritogenic mediators, which initiate a reciprocal communication with specific nociceptors on sensory nerve fibers. Consequently, nerve fibers release inflammatory and vasoactive neuropeptides, which in turn activate mast cells in a feedback mechanism, thus promoting a vicious cycle of mast cell and nociceptor activation leading to neurogenic inflammation and pain/pruritus. Mechanisms underlying mast cell differentiation, activation, and intercellular interactions with inflammatory, vascular, and neural systems are deeply influenced by their microenvironment, imparting enormous heterogeneity and complexity in understanding their contribution to pain and pruritus. Neurogenic inflammation is central to both pain and pruritus, but specific mediators released by mast cells to promote this process may vary depending upon their location, stimuli, underlying pathology, gender, and species. Therefore, in this review, we present the contribution of mast cells in pathological conditions, including distressing pruritus exacerbated by psychologic stress and experienced by the majority of patients with psoriasis and atopic dermatitis and in different pain syndromes due to mastocytosis, sickle cell disease, and cancer.
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Affiliation(s)
- Kalpna Gupta
- Vascular Biology Center, Division of Hematology/Oncology/Transplantation, Department of Medicine, University of Minnesota, Minneapolis, MN, USA
| | - Ilkka T Harvima
- Department of Dermatology, University of Eastern Finland and Kuopio University Hospital, Kuopio, Finland
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64
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HAI J, KAWABATA F, KAWABATA Y, LIANG R, NISHIMURA S, TABATA S. Differences in the effects of TRPV1 antagonists on energy metabolism in mice . Biomed Res 2018; 39:279-286. [DOI: 10.2220/biomedres.39.279] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Jun HAI
- Laboratory of Functional Anatomy, Faculty of Agriculture, Kyushu University
| | - Fuminori KAWABATA
- Laboratory of Functional Anatomy, Faculty of Agriculture, Kyushu University
| | - Yuko KAWABATA
- Laboratory of Functional Anatomy, Faculty of Agriculture, Kyushu University
| | - Ruojun LIANG
- Laboratory of Functional Anatomy, Faculty of Agriculture, Kyushu University
| | - Shotaro NISHIMURA
- Laboratory of Functional Anatomy, Faculty of Agriculture, Kyushu University
| | - Shoji TABATA
- Laboratory of Functional Anatomy, Faculty of Agriculture, Kyushu University
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65
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Kodji X, Arkless KL, Kee Z, Cleary SJ, Aubdool AA, Evans E, Caton P, Pitchford SC, Brain SD. Sensory nerves mediate spontaneous behaviors in addition to inflammation in a murine model of psoriasis. FASEB J 2018; 33:1578-1594. [PMID: 30204499 PMCID: PMC6338626 DOI: 10.1096/fj.201800395rr] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Psoriasis is characterized by keratinocyte hyperproliferation, erythema, as well as a form of pruritus, involving cutaneous discomfort. There is evidence from both clinical and murine models of psoriasis that chemical or surgical depletion of small-diameter sensory nerves/nociceptors benefits the condition, but the mechanisms are unclear. Hence, we aimed to understand the involvement of sensory nerve mediators with a murine model of psoriasis and associated spontaneous behaviors, indicative of cutaneous discomfort. We have established an Aldara model of psoriasis in mice and chemically depleted the small-diameter nociceptors in a selective manner. The spontaneous behaviors, in addition to the erythema and skin pathology, were markedly improved. Attenuated inflammation was associated with reduced dermal macrophage influx and production of reactive oxygen/nitrogen species (peroxynitrite and protein nitrosylation). Subsequently, this directly influenced observed behavioral responses. However, the blockade of common sensory neurogenic mechanisms for transient receptor potential (TRP)V1, TRPA1, and neuropeptides (substance P and calcitonin gene-related peptide) using genetic and pharmacological approaches inhibited the behaviors but not the inflammation. Thus, a critical role of the established sensory TRP-neuropeptide pathway in influencing cutaneous discomfort is revealed, indicating the therapeutic potential of agents that block that pathway. The ongoing inflammation is mediated by a distinct sensory pathway involving macrophage activation.-Kodji, X., Arkless, K. L., Kee, Z., Cleary, S. J., Aubdool, A. A., Evans, E., Caton, P., Pitchford, S. C., Brain, S. D. Sensory nerves mediate spontaneous behaviors in addition to inflammation in a murine model of psoriasis.
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Affiliation(s)
- Xenia Kodji
- British Heart Foundation (BHF) Cardiovascular Centre of Research Excellence, Vascular Biology and Inflammation Section, King's College London, London, United Kingdom
| | - Kate L Arkless
- British Heart Foundation (BHF) Cardiovascular Centre of Research Excellence, Vascular Biology and Inflammation Section, King's College London, London, United Kingdom
| | - Zizheng Kee
- British Heart Foundation (BHF) Cardiovascular Centre of Research Excellence, Vascular Biology and Inflammation Section, King's College London, London, United Kingdom
| | - Simon J Cleary
- Sackler Institute of Pulmonary Pharmacology, Institute of Pharmaceutical Science, King's College London, London, United Kingdom
| | - Aisah A Aubdool
- British Heart Foundation (BHF) Cardiovascular Centre of Research Excellence, Vascular Biology and Inflammation Section, King's College London, London, United Kingdom
| | - Elizabeth Evans
- Diabetes Research Group, Division of Diabetes and Nutritional Sciences, King's College London, London, United Kingdom
| | - Paul Caton
- Diabetes Research Group, Division of Diabetes and Nutritional Sciences, King's College London, London, United Kingdom
| | - Simon C Pitchford
- Sackler Institute of Pulmonary Pharmacology, Institute of Pharmaceutical Science, King's College London, London, United Kingdom
| | - Susan D Brain
- British Heart Foundation (BHF) Cardiovascular Centre of Research Excellence, Vascular Biology and Inflammation Section, King's College London, London, United Kingdom
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Kwon K, Park SH, Han BS, Oh SW, Lee SE, Yoo JA, Park SJ, Kim J, Kim JW, Cho JY, Lee J. Negative Cellular Effects of Urban Particulate Matter on Human Keratinocytes Are Mediated by P38 MAPK and NF-κB-dependent Expression of TRPV 1. Int J Mol Sci 2018; 19:ijms19092660. [PMID: 30205521 PMCID: PMC6163502 DOI: 10.3390/ijms19092660] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Revised: 09/03/2018] [Accepted: 09/05/2018] [Indexed: 12/14/2022] Open
Abstract
Urban particulate matter (UPM) exerts negative effects on various human organs. Transient receptor potential vanilloid 1 (TRPV1) is a polymodal sensory transducer that can be activated by multiple noxious stimuli. This study aimed to explore the effects of the UPM 1648a on the expression of TRPV1, and its regulatory mechanisms in HaCaT cells. UPM enhanced TRPV 1 promoter-luciferase reporter activity. UPM also increased expression of the TRPV 1 gene as evidenced by increased mRNA and protein levels of TRPV 1. In addition, elucidation of the underlying mechanism behind the UPM-mediated effects on TRPV 1 expression revealed that UPM can upregulate expression of the TRPV1 gene by activating activator protein-1 (AP-1) and nuclear factor kappa B (NF-κB). The UPM treatment also altered Ca2+ influx and cell proliferation, as well as production of interleukin-8 (IL-8), tumor necrosis factor-α (TNF-α), and interleukin-1β (IL-1β). In addition, these UPM-induced effects were attenuated by SB203580 and ammonium pyrrolidinedithiocarbamate (PDTC). However, SP600125 and PD98059 did not alter the UPM-induced effects. Taken together, these findings indicate that UPM upregulates expression of the TRPV 1 gene, which is mediated by the p38 mitogen-activated protein kinase (MAPK) and NF-κB signaling pathways and suggest that UPM is a potential irritant that can induce skin processes such as aging and inflammatory responses.
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Affiliation(s)
- Kitae Kwon
- Molecular Dermatology Laboratory, Department of Integrative Biotechnology, College of Biotechnology and Bioengineering, Sungkyunkwan University, Suwon City, Gyunggi Do 16419, Korea.
| | - See-Hyoung Park
- Department of Bio and Chemical Engineering, Hongik University, Sejong City 300-16, Korea.
| | - Byung Seok Han
- AMI Cosmetic Co., Ltd., 19 Yanghwa-ro, Mapo-gu, Seoul 04026, Korea.
| | - Sae Woong Oh
- Molecular Dermatology Laboratory, Department of Integrative Biotechnology, College of Biotechnology and Bioengineering, Sungkyunkwan University, Suwon City, Gyunggi Do 16419, Korea.
| | - Seung Eun Lee
- Molecular Dermatology Laboratory, Department of Integrative Biotechnology, College of Biotechnology and Bioengineering, Sungkyunkwan University, Suwon City, Gyunggi Do 16419, Korea.
| | - Ju Ah Yoo
- Molecular Dermatology Laboratory, Department of Integrative Biotechnology, College of Biotechnology and Bioengineering, Sungkyunkwan University, Suwon City, Gyunggi Do 16419, Korea.
| | - Se Jung Park
- Molecular Dermatology Laboratory, Department of Integrative Biotechnology, College of Biotechnology and Bioengineering, Sungkyunkwan University, Suwon City, Gyunggi Do 16419, Korea.
| | - Jangsoon Kim
- Molecular Dermatology Laboratory, Department of Integrative Biotechnology, College of Biotechnology and Bioengineering, Sungkyunkwan University, Suwon City, Gyunggi Do 16419, Korea.
| | - Ji Woong Kim
- AMI Cosmetic Co., Ltd., 19 Yanghwa-ro, Mapo-gu, Seoul 04026, Korea.
| | - Jae Youl Cho
- Molecular Immunology Laboratory, Department of Integrative Biotechnology, College of Biotechnology and Bioengineering, Sungkyunkwan University, Suwon City, Gyunggi Do 16419, Korea.
| | - Jongsung Lee
- Molecular Dermatology Laboratory, Department of Integrative Biotechnology, College of Biotechnology and Bioengineering, Sungkyunkwan University, Suwon City, Gyunggi Do 16419, Korea.
- Biocosmetics Research Center, College of Biotechnology and Bioengineering, Sungkyunkwan University, Suwon City, Gyunggi Do 16419, Korea.
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The endocannabinoid system of the skin. A potential approach for the treatment of skin disorders. Biochem Pharmacol 2018; 157:122-133. [PMID: 30138623 DOI: 10.1016/j.bcp.2018.08.022] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Accepted: 08/16/2018] [Indexed: 12/31/2022]
Abstract
The skin is the largest organ of the body and has a complex and very active structure that contributes to homeostasis and provides the first line defense against injury and infection. In the past few years it has become evident that the endocannabinoid system (ECS) plays a relevant role in healthy and diseased skin. Specifically, we review how the dysregulation of ECS has been associated to dermatological disorders such as atopic dermatitis, psoriasis, scleroderma and skin cancer. Therefore, the druggability of the ECS could open new research avenues for the treatment of the pathologies mentioned. Numerous studies have reported that phytocannabinoids and their biological analogues modulate a complex network pharmacology involved in the modulation of ECS, focusing on classical cannabinoid receptors, transient receptor potential channels (TRPs), and peroxisome proliferator-activated receptors (PPARs). The combined targeting of several end-points seems critical to provide better chances of therapeutically success, in sharp contrast to the one-disease-one-target dogma that permeates current drug discovery campaigns.
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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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Schmidberger M, Daniels R, Lunter DJ. Method to determine the impact of substantivity on ex vivo skin-permeation. Eur J Pharm Biopharm 2018; 131:1-7. [PMID: 30048744 DOI: 10.1016/j.ejpb.2018.07.020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Revised: 07/19/2018] [Accepted: 07/23/2018] [Indexed: 11/17/2022]
Abstract
Topical formulations are the most common therapeutic agents in the treatment of skin diseases. They contain one or more active pharmaceutical ingredients (API) which need to penetrate or permeate the skin in order to exert their effect. However, after application a part of the formulation is removed from the skin due to contact with the environment. Therefore, a part of the active is then not available for penetration and thus, a loss in therapeutic effect will result. To achieve the desired therapeutic outcome a sufficient fraction of the formulation must remain on the skin. The extent to which the loss of preparation affects penetration and permeation is less investigated. This work presents a method to examine the influence of mechanical stress and formulation loss on skin permeation. A movable punch with a defined weight simulated contact between clothing or skin and the applied formulation. Weight of the tool, number of contacts and speed settings were variable and were investigated. Ex vivo permeation experiments were performed in Franz diffusion cells using porcine skin. Three preparations with nonivamide as active ingredient were chosen as model formulations: A semisolid cream, an oil-in-oil emulsion and a film-forming formulation. The last two show sustained permeation profiles. The method uses skin-to-formulation and clothing-to-formulation contact to simulate the removal of the formulations from the skin.
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Affiliation(s)
- Markus Schmidberger
- Department of Pharmaceutical Technology, Eberhard Karls University, Tuebingen, Germany
| | - Rolf Daniels
- Department of Pharmaceutical Technology, Eberhard Karls University, Tuebingen, Germany
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71
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Langan EA, Hinde E, Paus R. Prolactin as a candidate sebotrop(h)ic hormone? Exp Dermatol 2018; 27:729-736. [DOI: 10.1111/exd.13545] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/20/2018] [Indexed: 12/11/2022]
Affiliation(s)
- Ewan A. Langan
- Department of Dermatology; University of Luebeck; Luebeck Germany
- Dermatology Research Centre; NIHR Manchester Biomedical Research Centre; University of Manchester; Manchester UK
| | - Eleanor Hinde
- Dermatology Research Centre; NIHR Manchester Biomedical Research Centre; University of Manchester; Manchester UK
| | - Ralf Paus
- Dermatology Research Centre; NIHR Manchester Biomedical Research Centre; University of Manchester; Manchester UK
- Department of Dermatology and Cutaneous Surgery; University of Miami Miller School of Medicine; Miami FL USA
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72
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Kamshilin AA, Volynsky MA, Khayrutdinova O, Nurkhametova D, Babayan L, Amelin AV, Mamontov OV, Giniatullin R. Novel capsaicin-induced parameters of microcirculation in migraine patients revealed by imaging photoplethysmography. J Headache Pain 2018; 19:43. [PMID: 29915934 PMCID: PMC6005996 DOI: 10.1186/s10194-018-0872-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Accepted: 06/13/2018] [Indexed: 01/03/2023] Open
Abstract
Background The non-invasive biomarkers of migraine can help to develop the personalized medication of this disorder. In testing of the antimigraine drugs the capsaicin-induced skin redness with activated TRPV1 receptors in sensory neurons associated with the release of the migraine mediator CGRP has already been widely used. Methods Fourteen migraine patients (mean age 34.6 ± 10.2 years) and 14 healthy volunteers (mean age 29.9 ± 9.7 years) participated in the experiment. A new arrangement of imaging photoplethysmography recently developed by us was used here to discover novel sensitive parameters of dermal blood flow during capsaicin applications in migraine patients. Results Blood pulsation amplitude (BPA) observed as optical-intensity waveform varying synchronously with heartbeat was used for detailed exploration of microcirculatory perfusion induced by capsicum patch application. The BPA signals, once having appeared after certain latent period, were progressively rising until being saturated. Capsaicin-induced high BPA areas were distributed unevenly under the patch, forming “hot spots.” Interestingly the hot spots were much more variable in migraine patients than in the control group. In contrast to BPA, a slow component of waveforms related to the skin redness changed significantly less than BPA highlighting the latter parameter as the potential sensitive biomarker of capsaicin-induced activation of the blood flow. Thus, in migraine patients, there is a non-uniform (both in space and in time) reaction to capsaicin, resulting in highly variable openings of skin capillaries. Conclusion BPA dynamics measured by imaging photoplethysmography could serve as a novel sensitive non-invasive biomarker of migraine-associated changes in microcirculation.
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Affiliation(s)
- Alexei A Kamshilin
- Department of Computer Photonics and Videomatics, ITMO University, St. Petersburg, Russia.
| | - Maxim A Volynsky
- Department of Computer Photonics and Videomatics, ITMO University, St. Petersburg, Russia
| | - Olga Khayrutdinova
- Department of Neurology and Rehabilitation, Kazan State Medical University, Kazan, Russia
| | - Dilyara Nurkhametova
- Laboratory of Neurobiology, Kazan Federal University, Kazan, Russia.,Department of Neurobiology, University of Eastern Finland, Kuopio, Finland
| | - Laura Babayan
- Department of Neurology and Neurosurgery, Pavlov First Saint Petersburg State Medical University, St. Petersburg, Russia
| | - Alexander V Amelin
- Department of Neurology and Neurosurgery, Pavlov First Saint Petersburg State Medical University, St. Petersburg, Russia
| | - Oleg V Mamontov
- Department of Computer Photonics and Videomatics, ITMO University, St. Petersburg, Russia.,Department of Circulation Physiology, Almazov National Medical Research Centre, St. Petersburg, Russia
| | - Rashid Giniatullin
- Department of Computer Photonics and Videomatics, ITMO University, St. Petersburg, Russia.,Laboratory of Neurobiology, Kazan Federal University, Kazan, Russia.,Department of Neurobiology, University of Eastern Finland, Kuopio, Finland
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Talagas M, Lebonvallet N, Misery L. Intraepidermal nerve fibres are not the exclusive tranducers of nociception. J Neurosci Methods 2018; 306:92-93. [PMID: 29787776 DOI: 10.1016/j.jneumeth.2018.05.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Revised: 05/18/2018] [Accepted: 05/18/2018] [Indexed: 01/27/2023]
Abstract
The goal of this article is to provide an insight of the most recent data on cutaneous nociception. Indeed recent studies have demonstrated that keratinocytes closely participate in sensory transduction, and therefore, intraepidermal free nerve endings are not exclusive transducers of pain. Therefore, the results of neurophysiological studies should be interpreted in the light of this information.
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Affiliation(s)
- Matthieu Talagas
- Laboratory of Interactions Keratinocytes Neurons (EA4685), University of Western Brittany, Brest, France; Department of Pathology, University Hospital of Brest, 29609 Brest Cedex, France.
| | - Nicolas Lebonvallet
- Laboratory of Interactions Keratinocytes Neurons (EA4685), University of Western Brittany, Brest, France
| | - Laurent Misery
- Laboratory of Interactions Keratinocytes Neurons (EA4685), University of Western Brittany, Brest, France; Department of Dermatology, University Hospital of Brest, 29609 Brest Cedex, France
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Lee JH, Choi CS, Bae IH, Choi JK, Park YH, Park M. A novel, topical, nonsteroidal, TRPV1 antagonist, PAC-14028 cream improves skin barrier function and exerts anti-inflammatory action through modulating epidermal differentiation markers and suppressing Th2 cytokines in atopic dermatitis. J Dermatol Sci 2018; 91:S0923-1811(18)30204-4. [PMID: 29752146 DOI: 10.1016/j.jdermsci.2018.04.017] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2018] [Revised: 04/21/2018] [Accepted: 04/25/2018] [Indexed: 11/23/2022]
Abstract
BACKGROUND Although it is established that epidermal barrier disturbance and immune dysfunction resulting in IgE sensitization are critical factors in the development of cutaneous inflammation, the pathogenesis and targeted therapy of atopic dermatitis (AD)-specific pathways have still been unknown. OBJECTIVE Taking into account the fact that Th2 cytokines in AD have both unique and overlapping functions including increased epidermal thickening, inflammation, and decreased expressing of the barrier proteins keratinocyte differentiation, we sought to clarify our hypothesis that TRPV1 antagonist plays a critical role in skin barrier function and can be a therapeutic target for AD. METHODS AD-like dermatitis was induced in hairless mice by repeated oxazolone (Ox) challenges to hairless mice. The functional studies concerning skin barrier function, anti-inflammatory action, and molecular mechanism by TRPV1 antagonism were conducted by histopathological assays, ELISA, qPCR, western blotting, and skin blood flow measurement. RESULTS Topically administered TRPV1 antagonist, PAC-14028 (Asivatrep: C21H22F5N3O3S), improved AD-like dermatitis and skin barrier functions, and restored the expression of epidermal differentiation markers. In addition, the PAC-14028 cream significantly inhibited cutaneous inflammation by decreasing the expression of serum IgE, and the epidermal expression of IL-4, and IL-13 in Ox-AD mice. These results may provide a novel insight into the molecular mechanism of PAC-14028 cream involved in anti-inflammatory effects and skin barrier functions by suppressing the multiple signaling pathways including IL-4/-13-mediated activation of JAK/STAT, TRPV1, and neuropeptides. CONCLUSION PAC-14028 cream can be a potential therapeutic tool for the treatment of chronic inflammation and disrupted barrier function in patients with AD.
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Affiliation(s)
- Ji-Hae Lee
- Vital Beautie Research Institute, Amorepacific Corporation R&D Center, Yongin, Republic of Korea
| | - Chang Soon Choi
- Vital Beautie Research Institute, Amorepacific Corporation R&D Center, Yongin, Republic of Korea
| | - Il-Hong Bae
- Vital Beautie Research Institute, Amorepacific Corporation R&D Center, Yongin, Republic of Korea
| | - Jin Kyu Choi
- Medical Beauty QA Team, Aestura Corporation, Anseong, Republic of Korea
| | - Young-Ho Park
- Vital Beautie Research Institute, Amorepacific Corporation R&D Center, Yongin, Republic of Korea
| | - Miyoung Park
- Vital Beautie Research Institute, Amorepacific Corporation R&D Center, Yongin, Republic of Korea.
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Choi JE, Di Nardo A. Skin neurogenic inflammation. Semin Immunopathol 2018; 40:249-259. [PMID: 29713744 DOI: 10.1007/s00281-018-0675-z] [Citation(s) in RCA: 158] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2017] [Accepted: 03/06/2018] [Indexed: 01/12/2023]
Abstract
The epidermis closely interacts with nerve endings, and both epidermis and nerves produce substances for mutual sustenance. Neuropeptides, like substance P (SP) and calcitonin gene-related protein (CGRP), are produced by sensory nerves in the dermis; they induce mast cells to release vasoactive amines that facilitate infiltration of neutrophils and T cells. Some receptors are more important than others in the generation of itch. The Mas-related G protein-coupled receptors (Mrgpr) family as well as transient receptor potential ankyrin 1 (TRPA1) and protease activated receptor 2(Par2) have important roles in itch and inflammation. The activation of MrgprX1 degranulates mast cells to communicate with sensory nerve and cutaneous cells for developing neurogenic inflammation. Mrgprs and transient receptor potential vanilloid 4 (TRPV4) are crucial for the generation of skin diseases like rosacea, while SP, CGRP, somatostatin, β-endorphin, vasoactive intestinal peptide (VIP), and pituitary adenylate cyclase-activating polypeptide (PACAP) can modulate the immune system during psoriasis development. The increased level of SP, in atopic dermatitis, induces the release of interferon (IFN)-γ, interleukin (IL)-4, tumor necrosis factor (TNF)-α, and IL-10 from the peripheral blood mononuclear leukocytes. We are finally starting to understand the intricate connections between the skin neurons and resident skin cells and how their interaction can be key to controlling inflammation and from there the pathogenesis of diseases like atopic dermatitis, psoriasis, and rosacea.
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Affiliation(s)
- Jae Eun Choi
- Department of Dermatology, University of California San Diego, 9500 Gilman Drive #0869, La Jolla, CA, 92093, USA
| | - Anna Di Nardo
- Department of Dermatology, University of California San Diego, 9500 Gilman Drive #0869, La Jolla, CA, 92093, USA.
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Motte J, Ambrosius B, Grüter T, Bachir H, Sgodzai M, Pedreiturria X, Pitarokoili K, Gold R. Capsaicin-enriched diet ameliorates autoimmune neuritis in rats. J Neuroinflammation 2018; 15:122. [PMID: 29690884 PMCID: PMC5916583 DOI: 10.1186/s12974-018-1165-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Accepted: 04/18/2018] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Autoimmune neuropathies are common PNS disorders and effective treatment is challenging. Environmental influence and dietary components are known to affect the course of autoimmune diseases. Capsaicin as pungent component of chili-peppers is common in human nutrition. An influence of capsaicin on autoimmune diseases has been postulated. METHODS We tested capsaicin in the animal model of experimental autoimmune neuritis (EAN) in Lewis rat. Rats were immunized with P2-peptide and were treated with capsaicin in different preventive settings. Electrophysiological, histological, and molecular biological analyses of the sciatic nerve were performed to analyze T-cell and macrophage cell count, TRPV1, and cytokine expression. Moreover, FACS analyses including the intestinal immune system were executed. RESULTS We observed an immunomodulatory effect of an early preventive diet-concept, where a physiological dosage of oral capsaicin was given 10 days before immunization in EAN. A reduced inflammation of the sciatic nerve was significant detectable clinically, electrophysiologically (CMAPs reduced in control group p < 0.01; increase of nerve conduction blocks in control group p < 0.05), histologically (significant reduction of T-cells, macrophages and demyelination), and at cytokine level. In contrast, this therapeutic effect was missing with capsaicin given from the day of immunization onwards. As possible underlying mechanism, we were able to show changes in the expression of the capsaicin receptor in the sciatic nerve and the small intestine, as well as altered immune cell populations in the small intestine. CONCLUSION This is the first report about the immunomodulatory effect of the common nutrient, capsaicin, in an experimental model for autoimmune neuropathies.
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MESH Headings
- Animals
- Capsaicin/therapeutic use
- Cell Movement/drug effects
- Cytokines/metabolism
- Diet/methods
- Disease Models, Animal
- Evoked Potentials, Motor/drug effects
- Female
- Freund's Adjuvant/toxicity
- Gene Expression Regulation/drug effects
- Gene Expression Regulation/physiology
- Leukocytes, Mononuclear/metabolism
- Leukocytes, Mononuclear/pathology
- Macrophages/drug effects
- Macrophages/pathology
- Neural Conduction/drug effects
- Neuritis, Autoimmune, Experimental/diet therapy
- Neuritis, Autoimmune, Experimental/pathology
- Neuritis, Autoimmune, Experimental/physiopathology
- Rats
- Rats, Inbred Lew
- S100 Proteins/metabolism
- Sciatic Nerve/drug effects
- Sciatic Nerve/metabolism
- Sciatic Nerve/pathology
- T-Lymphocytes/drug effects
- TRPV Cation Channels/metabolism
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Affiliation(s)
- Jeremias Motte
- Department of Neurology, Ruhr University Bochum, St. Josef- Hospital, Gudrunstrasse 56, 44791 Bochum, Germany
| | - Björn Ambrosius
- Department of Neurology, Ruhr University Bochum, St. Josef- Hospital, Gudrunstrasse 56, 44791 Bochum, Germany
| | - Thomas Grüter
- Department of Neurology, Ruhr University Bochum, St. Josef- Hospital, Gudrunstrasse 56, 44791 Bochum, Germany
| | - Hussein Bachir
- Department of Neurology, Ruhr University Bochum, St. Josef- Hospital, Gudrunstrasse 56, 44791 Bochum, Germany
| | - Melissa Sgodzai
- Department of Neurology, Ruhr University Bochum, St. Josef- Hospital, Gudrunstrasse 56, 44791 Bochum, Germany
| | - Xiomara Pedreiturria
- Department of Neurology, Ruhr University Bochum, St. Josef- Hospital, Gudrunstrasse 56, 44791 Bochum, Germany
| | - Kalliopi Pitarokoili
- Department of Neurology, Ruhr University Bochum, St. Josef- Hospital, Gudrunstrasse 56, 44791 Bochum, Germany
| | - Ralf Gold
- Department of Neurology, Ruhr University Bochum, St. Josef- Hospital, Gudrunstrasse 56, 44791 Bochum, Germany
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Sjögren E, Kullenberg T, Jonzon B, Segerdahl M, Stålberg O, Halldin M, Sundgren-Andersson A. Clinical testing of three novel transient receptor potential cation channel subfamily V member 1 antagonists in a pharmacodynamic intradermal capsaicin model. Eur J Pain 2018; 22:1214-1228. [DOI: 10.1002/ejp.1209] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/23/2018] [Indexed: 11/11/2022]
Affiliation(s)
- E. Sjögren
- Department of Pharmacy; Uppsala University; Sweden
| | | | - B. Jonzon
- Medical Products Agency; Uppsala Sweden
| | - M. Segerdahl
- Lundbeck A/S, Valby, Denmark and Karolinska Institute; Stockholm Sweden
| | - O. Stålberg
- Division of Analytical Pharmaceutical Chemistry; Department of Medicinal Chemistry; Uppsala University; Sweden
| | - M.M. Halldin
- AlzeCure Foundation; Karolinska Institute Science Park; Huddinge Sweden
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Pereira M, Lüling H, Dieckhöfer A, Steinke S, Zeidler C, Agelopoulos K, Ständer S. Application of an 8% capsaicin patch normalizes epidermal TRPV1 expression but not the decreased intraepidermal nerve fibre density in patients with brachioradial pruritus. J Eur Acad Dermatol Venereol 2018; 32:1535-1541. [DOI: 10.1111/jdv.14857] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Accepted: 01/11/2018] [Indexed: 11/30/2022]
Affiliation(s)
- M.P. Pereira
- Department of Dermatology and Center for Chronic Pruritus; University Hospital Münster; Münster Germany
| | - H. Lüling
- Department of Dermatology and Center for Chronic Pruritus; University Hospital Münster; Münster Germany
| | - A. Dieckhöfer
- Department of Dermatology and Center for Chronic Pruritus; University Hospital Münster; Münster Germany
| | - S. Steinke
- Department of Dermatology and Center for Chronic Pruritus; University Hospital Münster; Münster Germany
| | - C. Zeidler
- Department of Dermatology and Center for Chronic Pruritus; University Hospital Münster; Münster Germany
| | - K. Agelopoulos
- Department of Dermatology and Center for Chronic Pruritus; University Hospital Münster; Münster Germany
| | - S. Ständer
- Department of Dermatology and Center for Chronic Pruritus; University Hospital Münster; Münster Germany
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Steinhoff M, Buddenkotte J, Lerner EA. Role of mast cells and basophils in pruritus. Immunol Rev 2018; 282:248-264. [DOI: 10.1111/imr.12635] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Martin Steinhoff
- Department of Dermatology and Venereology; Hamad Medical Corporation; Doha Qatar
- Translational Research Institute; Hamad Medical Corporation; Doha Qatar
- Weill Cornell Medicine-Qatar; Doha Qatar
- Medical School; Qatar University; Doha Qatar
- Department Of Dermatology and UCD Charles Institute for Translational Dermatology; University College Dublin; Dublin Ireland
| | - Jörg Buddenkotte
- Department of Dermatology and Venereology; Hamad Medical Corporation; Doha Qatar
- Translational Research Institute; Hamad Medical Corporation; Doha Qatar
| | - Ethan A. Lerner
- Cutaneous Biology Research Center; Department of Dermatology; Massachusetts General Hospital/Harvard Medical School; Charlestown MA USA
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80
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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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81
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Georgescu SR, Sârbu MI, Matei C, Ilie MA, Caruntu C, Constantin C, Neagu M, Tampa M. Capsaicin: Friend or Foe in Skin Cancer and Other Related Malignancies? Nutrients 2017; 9:E1365. [PMID: 29258175 PMCID: PMC5748815 DOI: 10.3390/nu9121365] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Revised: 12/11/2017] [Accepted: 12/12/2017] [Indexed: 02/07/2023] Open
Abstract
Capsaicin is the main pungent in chili peppers, one of the most commonly used spices in the world; its analgesic and anti-inflammatory properties have been proven in various cultures for centuries. It is a lipophilic substance belonging to the class of vanilloids and an agonist of the transient receptor potential vanilloid 1 receptor. Taking into consideration the complex neuro-immune impact of capsaicin and the potential link between inflammation and carcinogenesis, the effect of capsaicin on muco-cutaneous cancer has aroused a growing interest. The aim of this review is to look over the most recent data regarding the connection between capsaicin and muco-cutaneous cancers, with emphasis on melanoma and muco-cutaneous squamous cell carcinoma.
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Affiliation(s)
- Simona-Roxana Georgescu
- Department of Dermatology, Carol DavilaUniversity of Medicine and Pharmacy, 020021 Bucharest, Romania.
| | - Maria-Isabela Sârbu
- Department of Dermatology, Carol DavilaUniversity of Medicine and Pharmacy, 020021 Bucharest, Romania.
| | - Clara Matei
- Department of Dermatology, Carol DavilaUniversity of Medicine and Pharmacy, 020021 Bucharest, Romania.
| | - Mihaela Adriana Ilie
- Department of Biochemistry, Carol Davila University of Medicine and Pharmacy, 020021 Bucharest, Romania.
| | - Constantin Caruntu
- Department of Physiology, Carol Davila University of Medicine and Pharmacy, 050474 Bucharest, Romania.
- Department of Dermatology, Prof. N.C. Paulescu National Institute of Diabetes, Nutrition and Metabolic Diseases, 011233 Bucharest, Romania.
| | - Carolina Constantin
- Immunology Department, Victor Babes National Institute of Pathology, 050096 Bucharest, Romania.
| | - Monica Neagu
- Immunology Department, Victor Babes National Institute of Pathology, 050096 Bucharest, Romania.
- Faculty of Biology, University of Bucharest, 76201 Bucharest, Romania.
| | - Mircea Tampa
- Department of Dermatology, Carol DavilaUniversity of Medicine and Pharmacy, 020021 Bucharest, Romania.
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82
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Patowary P, Pathak MP, Zaman K, Raju PS, Chattopadhyay P. Research progress of capsaicin responses to various pharmacological challenges. Biomed Pharmacother 2017; 96:1501-1512. [PMID: 29198921 DOI: 10.1016/j.biopha.2017.11.124] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Revised: 11/06/2017] [Accepted: 11/27/2017] [Indexed: 02/07/2023] Open
Abstract
Capsaicin, a well known vanilloid, has shown evidence of an ample variety of biological effects which make it the target of extensive research ever since its identification. In spite of the fact that capsaicin causes health hazards in quite a few ways, yet, the verity cannot be ignored that capsaicin has several therapeutic implications. In patients with hypersensitive bladders, vesical instillation of 1 mM capsaicin markedly improved urinary frequency and urge incontinence. Again, administration of capsaicin favors an augmentation in lipid mobilization and a decrease in adipose tissue mass. Topical capsaicin cream as well decreases postsurgical neuropathic pain and is preferred by patients over a placebo among other therapies. Several in vitro studies have revealed that capsaicin results in growth arrest in some transformed cell lines. Furthermore, capsaicin has been proven to be an undeniably exciting molecule and remains a valuable drug for alleviating pain and itch. It has been recognized that capsaicinoids are the most potential agonists of capsaicin receptor (TRPV1). However, vanilloids could exert the beneficial effects not only through the receptor-dependent pathway but also through the receptor-independent one. The involvement of serotonin, neuropeptide Substance P and somatostatin in the pharmacological actions of capsaicin has been expansively investigated. Better understanding of the established TRPV1 receptor mechanism as well as exploring other possible receptor mechanism may publicize other new clinical efficacies of capsaicin. Further, clinical studies are required in several of these conditions to establish the efficacy of capsaicin.
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Affiliation(s)
- Pompy Patowary
- Division of Pharmaceutical Technology, Defence Research Laboratory, Tezpur, 784 001, Assam, India; Department of Pharmaceutical Sciences, Dibrugarh University, Dibrugarh, 786 004, Assam, India
| | - Manash Pratim Pathak
- Division of Pharmaceutical Technology, Defence Research Laboratory, Tezpur, 784 001, Assam, India; Department of Pharmaceutical Sciences, Dibrugarh University, Dibrugarh, 786 004, Assam, India
| | - Kamaruz Zaman
- Department of Pharmaceutical Sciences, Dibrugarh University, Dibrugarh, 786 004, Assam, India
| | - P S Raju
- Division of Pharmaceutical Technology, Defence Research Laboratory, Tezpur, 784 001, Assam, India
| | - Pronobesh Chattopadhyay
- Division of Pharmaceutical Technology, Defence Research Laboratory, Tezpur, 784 001, Assam, India.
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83
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Intraluminal Administration of Resiniferatoxin Protects against Clostridium difficile Toxin A-Induced Colitis. Gastroenterol Res Pract 2017; 2017:8438172. [PMID: 28484490 PMCID: PMC5412210 DOI: 10.1155/2017/8438172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2017] [Accepted: 03/07/2017] [Indexed: 11/17/2022] Open
Abstract
Clostridium difficile toxin A is a colonic inflammatory agent that acts partially by activation of TRPV1 (transient receptor potential vanilloid type 1). Resiniferatoxin (RTX) is an excitotoxin that activates TRPV1 at low concentrations and defunctionalizes TRPV1 at high concentrations. RTX at various doses was injected intraluminally into isolated ileal segments in anesthetized rats. After 3 hours, the treated segments were removed and inflammation was assessed. This acute treatment with RTX resulted in biphasic responses: (1) an increase in inflammation similar to that caused by toxin A and capsaicin at low doses of up to 100 ng RTX and (2) no inflammatory effect of RTX at higher doses (1–100 μg), consistent with a defunctionalizing or neurotoxic effect of RTX at high doses. Separately, anesthetized rats were treated with RTX enemas and one or four weeks later were challenged with toxin A. Toxin A-induced colitis was significantly inhibited one week after an RTX enema, and this effect was RTX dose dependent. When tested four weeks after administration of the RTX enema, protection against toxin A colitis was lost. In conclusion, an RTX enema protects against toxin A-induced colitis in rats for at least one week but less than four weeks.
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84
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TRPV1 and TRPA1 in cutaneous neurogenic and chronic inflammation: pro-inflammatory response induced by their activation and their sensitization. Protein Cell 2017; 8:644-661. [PMID: 28364279 PMCID: PMC5563280 DOI: 10.1007/s13238-017-0395-5] [Citation(s) in RCA: 234] [Impact Index Per Article: 33.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Accepted: 02/28/2017] [Indexed: 12/19/2022] Open
Abstract
Cutaneous neurogenic inflammation (CNI) is inflammation that is induced (or enhanced) in the skin by the release of neuropeptides from sensory nerve endings. Clinical manifestations are mainly sensory and vascular disorders such as pruritus and erythema. Transient receptor potential vanilloid 1 and ankyrin 1 (TRPV1 and TRPA1, respectively) are non-selective cation channels known to specifically participate in pain and CNI. Both TRPV1 and TRPA1 are co-expressed in a large subset of sensory nerves, where they integrate numerous noxious stimuli. It is now clear that the expression of both channels also extends far beyond the sensory nerves in the skin, occuring also in keratinocytes, mast cells, dendritic cells, and endothelial cells. In these non-neuronal cells, TRPV1 and TRPA1 also act as nociceptive sensors and potentiate the inflammatory process. This review discusses the role of TRPV1 and TRPA1 in the modulation of inflammatory genes that leads to or maintains CNI in sensory neurons and non-neuronal skin cells. In addition, this review provides a summary of current research on the intracellular sensitization pathways of both TRP channels by other endogenous inflammatory mediators that promote the self-maintenance of CNI.
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85
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Allen DR, Huang M, Parupia IM, Dubelko AR, Frohman EM, Davis SL. Impaired sweating responses to a passive whole body heat stress in individuals with multiple sclerosis. J Neurophysiol 2017; 118:7-14. [PMID: 28275061 DOI: 10.1152/jn.00897.2016] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Revised: 03/02/2017] [Accepted: 03/07/2017] [Indexed: 01/11/2023] Open
Abstract
Multiple sclerosis (MS) is an autoimmune disease that affects the central nervous system (CNS), disrupting autonomic function. The aim of this study was to test the hypothesis that individuals with MS have blunted control of thermoregulatory reflex increases in sweat rate (SR) and cutaneous vasodilation compared with controls during a passive whole body heat stress (WBH). Eighteen individuals with relapsing-remitting MS and 18 healthy controls (Con) participated in the study. Core temperature (Tcore), skin temperature, heart rate, arterial blood pressure (10-min intervals), skin blood flow (laser-Doppler flux, LDF), and SR were continuously measured during normothermic baseline (34°C water perfusing a tube-lined suit) and WBH (increased Tcore 0.8°C via 48°C water perfusing the suit). Following WBH, local heaters were warmed to 42°C, inducing peak cutaneous vasodilation at the site of LDF collection. Cutaneous vascular conductance (CVC) was calculated as the ratio of LDF to mean arterial pressure and expressed as a percentage of peak achieved during local heating. Individuals with MS had attenuated SR responses to WBH (ΔSR from baseline: Con, 0.65 ± 0.27; MS, 0.42 ± 0.17 mg·cm-2·min-1, P = 0.003), whereas Δ%CVC42C from baseline was similar between groups (Con, 42 ± 16%; MS, 38 ± 12%, P = 0.39). SR responses were blunted as a function of Tcore in MS (interaction: group × Tcore, P = 0.03), of which differences were evident at ΔTcore 0.7°C and 0.8°C (P < 0.05). No interaction was observed in Δ%CVC42C Taken together, the findings show MS blunts sweating responses, whereas control of the cutaneous vasculature is preserved, in response to WBH.NEW & NOTEWORTHY This study is the first to assess the reflex control of the thermoregulatory system in individuals living with multiple sclerosis (MS). The novel findings are twofold. First, attenuated increases in sweat rate in subjects with MS compared with healthy controls were observed in response to a moderate increase (0.8°C) in core temperature via passive whole body heat stress. Second, it appears the reflex control of the cutaneous vasculature is preserved in MS.
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Affiliation(s)
- Dustin R Allen
- Department of Applied Physiology & Wellness, Southern Methodist University, Dallas, Texas; and
| | - Mu Huang
- Department of Applied Physiology & Wellness, Southern Methodist University, Dallas, Texas; and
| | - Iqra M Parupia
- Department of Applied Physiology & Wellness, Southern Methodist University, Dallas, Texas; and
| | - Ariana R Dubelko
- Department of Applied Physiology & Wellness, Southern Methodist University, Dallas, Texas; and
| | - Elliot M Frohman
- Department of Neurology & Neurotherapeutics, University of Texas Southwestern Medical Center, Dallas, Texas
| | - Scott L Davis
- Department of Applied Physiology & Wellness, Southern Methodist University, Dallas, Texas; and .,Department of Neurology & Neurotherapeutics, University of Texas Southwestern Medical Center, Dallas, Texas
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86
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Solís-López A, Kriebs U, Marx A, Mannebach S, Liedtke WB, Caterina MJ, Freichel M, Tsvilovskyy VV. Analysis of TRPV channel activation by stimulation of FCεRI and MRGPR receptors in mouse peritoneal mast cells. PLoS One 2017; 12:e0171366. [PMID: 28158279 PMCID: PMC5291405 DOI: 10.1371/journal.pone.0171366] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Accepted: 01/19/2017] [Indexed: 11/18/2022] Open
Abstract
The activation of mast cells (MC) is part of the innate and adaptive immune responses and depends on Ca2+ entry across the plasma membrane, leading to the release of preformed inflammatory mediators by degranulation or by de novo synthesis. The calcium conducting channels of the TRPV family, known by their thermo and osmotic sensitivity, have been proposed to be involved in the MC activation in murine, rat, and human mast cell models. So far, immortalized mast cell lines and nonspecific TRPV blockers have been employed to characterize the role of TRPV channels in MC. The aim of this work was to elucidate the physiological role of TRPV channels by using primary peritoneal mast cells (PMCs), a model of connective tissue type mast cells. Our RT-PCR and NanoString analysis identified the expression of TRPV1, TRPV2, and TRPV4 channels in PMCs. For determination of the functional role of the expressed TRPV channels we performed measurements of intracellular free Ca2+ concentrations and beta-hexosaminidase release in PMCs obtained from wild type and mice deficient for corresponding TRPV1, TRPV2 and TRPV4 in response to various receptor-mediated and physical stimuli. Furthermore, substances known as activators of corresponding TRPV-channels were also tested using these assays. Our results demonstrate that TRPV1, TRPV2, and TRPV4 do not participate in activation pathways triggered by activation of the high-affinity receptors for IgE (FcεRI), Mrgprb2 receptor, or Endothelin-1 receptor nor by heat or osmotic stimulation in mouse PMCs.
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Affiliation(s)
- A. Solís-López
- Pharmakologisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Baden-Württemberg, Germany
| | - U. Kriebs
- Pharmakologisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Baden-Württemberg, Germany
| | - A. Marx
- Pharmakologisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Baden-Württemberg, Germany
| | - S. Mannebach
- Experimentelle und Klinische Pharmakologie und Toxikologie, Universität des Saarlandes, Homburg, Saarland, Germany
| | - W. B. Liedtke
- Department of Neurology, School of Medicine Duke University, Durham, North Carolina, United States of America
| | - M. J. Caterina
- Departments of Neurosurgery, Biological Chemistry, and Neuroscience, Neurosurgery Pain Research Institute, The Johns Hopkins School of Medicine, Baltimore, Maryland, United States of America
| | - M. Freichel
- Pharmakologisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Baden-Württemberg, Germany
| | - V. V. Tsvilovskyy
- Pharmakologisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Baden-Württemberg, Germany
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87
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Murota H, Katayama I. Exacerbating factors of itch in atopic dermatitis. Allergol Int 2017; 66:8-13. [PMID: 27863904 DOI: 10.1016/j.alit.2016.10.005] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Revised: 10/11/2016] [Accepted: 10/12/2016] [Indexed: 01/01/2023] Open
Abstract
Atopic dermatitis (AD) displays different clinical symptoms, progress, and response to treatment during early infancy and after childhood. After the childhood period, itch appears first, followed by formation of well-circumscribed plaque or polymorphous dermatoses at the same site. When accompanied with dermatitis and dry skin, treatment of skin lesions should be prioritized. When itch appears first, disease history, such as causes and time of appearance of itch should be obtained by history taking. In many cases, itch increases in the evening when the sympathetic nerve activity decreased. Treatment is provided considering that hypersensitivity to various external stimulations can cause itch. Heat and sweating are thought to especially exacerbate itch. Factors causing itch, such as cytokines and chemical messengers, also induce itch mainly by stimulating the nerve. Scratching further aggravates dermatitis. Skin hypersensibility, where other non-itch senses, such as pain and heat, are felt as itch, sometimes occurs in AD. Abnormal elongation of the sensory nerve into the epidermis, as well as sensitizing of the peripheral/central nerve, are possible causes of hypersensitivity, leading to itch. To control itch induced by environmental factors such as heat, treatment for dermatitis is given priority. In the background of itch exacerbated by sweating, attention should be given to the negative impact of sweat on skin homeostasis due to 1) leaving excess sweat on the skin, and 2) heat retention due to insufficient sweating. Excess sweat on the skin should be properly wiped off, and dermatitis should be controlled so that appropriate amount of sweat can be produced. Not only stimulation from the skin surface, but also visual and auditory stimulation can induce new itch. This "contagious itch" can be notably observed in patients with AD. This article reviews and introduces causes of aggravation of itch and information regarding how to cope with such causes.
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88
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Kuncová J, Jirkovská A, Švíglerová J, Marková M, Meireles D, Čedíková M. Neonatal capsaicin administration impairs postnatal development of the cardiac chronotropy and inotropy in rats. Physiol Res 2016; 65:S633-S642. [PMID: 28006945 DOI: 10.33549/physiolres.933540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
The present study evaluated the impact of neonatal administration of capsaicin (neurotoxin from red hot pepper used for sensory denervation) on postnatal development of the heart rate and ventricular contractility. In the rats subjected to capsaicin administration (100 mg/kg) on postnatal days 2 and 3 and their vehicle-treated controls at the ages of 10 to 90 days, function of the sympathetic innervation of the developing heart was characterized by evaluation of chronotropic responses to metipranolol and atropine, norepinephrine concentrations in the heart, and norepinephrine release from the heart atria. Sensory denervation was verified by determination of calcitonin gene-related peptide levels in the heart. Direct cytotoxic effects of capsaicin were assessed on cultured neonatal cardiomyocytes. Capsaicin-treated rats displayed higher resting heart rates, lower atropine effect, but no difference in the effect of metipranolol. Norepinephrine tissue levels and release did not differ from controls. Contraction force of the right ventricular papillary muscle was lower till the age of 60 days. Significantly reduced viability of neonatal cardiomyocytes was demonstrated at capsaicin concentration 100 micromol/l. Our study suggests that neonatal capsaicin treatment leads to impaired maturation of the developing cardiomyocytes. This effect cannot be attributed exclusively to sensory denervation of the rat heart since capsaicin acts also directly on the cardiac cells.
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Affiliation(s)
- J Kuncová
- Department of Physiology, Biomedical Center, Faculty of Medicine in Pilsen, Charles University, Pilsen, Czech Republic.
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89
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TRP Channels in Skin Biology and Pathophysiology. Pharmaceuticals (Basel) 2016; 9:ph9040077. [PMID: 27983625 PMCID: PMC5198052 DOI: 10.3390/ph9040077] [Citation(s) in RCA: 334] [Impact Index Per Article: 41.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Revised: 12/08/2016] [Accepted: 12/09/2016] [Indexed: 11/17/2022] Open
Abstract
Ion channels of the Transient Receptor Potential (TRP) family mediate the influx of monovalent and/or divalent cations into cells in response to a host of chemical or physical stimuli. In the skin, TRP channels are expressed in many cell types, including keratinocytes, sensory neurons, melanocytes, and immune/inflammatory cells. Within these diverse cell types, TRP channels participate in physiological processes ranging from sensation to skin homeostasis. In addition, there is a growing body of evidence implicating abnormal TRP channel function, as a product of excessive or deficient channel activity, in pathological skin conditions such as chronic pain and itch, dermatitis, vitiligo, alopecia, wound healing, skin carcinogenesis, and skin barrier compromise. These diverse functions, coupled with the fact that many TRP channels possess pharmacologically accessible sites, make this family of proteins appealing therapeutic targets for skin disorders.
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90
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Hettwer S, Bänziger S, Suter B, Obermayer B. Grifolin derivatives from Albatrellus ovinus as TRPV1 receptor blockers for cosmetic applications. Int J Cosmet Sci 2016; 39:379-385. [PMID: 27883196 DOI: 10.1111/ics.12385] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2016] [Accepted: 11/15/2016] [Indexed: 12/31/2022]
Abstract
OBJECTIVE Blocking the TRPV1 receptor is an interesting approach for the treatment of sensitive skin. Here we investigated the potential of grifolin derivatives from Albatrellus ovinus to act as TRPV1 receptor blockers and their potential to serve as cosmetic active ingredients. METHODS Binding characteristics of grifolin derivatives from Albatrellus ovinus were determined in competitive and functional in vitro assays to achieve IC50 values. The TRPV1 receptor was activated in vivo with capsaicin and noxious heat to investigate skin reddening, microcirculation, skin sensations and heat pain thresholds. RESULTS Grifolin derivatives extracted from Albatrellus ovinus proved to inhibit the TRPV1 receptor in vitro and in vivo. Besides suppression of the TRPV1 receptor activity upon chemical stimulation with capsaicin, thermal activation was shown to be inhibited as well by application of cosmetic formulations containing 3% Albatrellus ovinus extract. The reduction of stinging and burning sensations as well as reduction of reddening and microcirculation upon irritation with capsaicin or thermal stress proved efficacy in vivo. CONCLUSION Grifolin derivatives from Albatrellus ovinus are able to serve as fungal-derived TRPV1 receptor blockers with capability to serve as a cosmetic active ingredient on sensitive skin.
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Affiliation(s)
- S Hettwer
- RAHN AG, Dörflistrasse 120, 8050 Zürich, Switzerland
| | - S Bänziger
- RAHN AG, Dörflistrasse 120, 8050 Zürich, Switzerland
| | - B Suter
- RAHN AG, Dörflistrasse 120, 8050 Zürich, Switzerland
| | - B Obermayer
- RAHN AG, Dörflistrasse 120, 8050 Zürich, Switzerland
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91
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Misery L, Loser K, Ständer S. Sensitive skin. J Eur Acad Dermatol Venereol 2016; 30 Suppl 1:2-8. [PMID: 26805416 DOI: 10.1111/jdv.13532] [Citation(s) in RCA: 84] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/27/2015] [Indexed: 12/15/2022]
Abstract
Sensitive skin is a clinical condition defined by the self-reported facial presence of different sensory perceptions, including tightness, stinging, burning, tingling, pain and pruritus. Sensitive skin may occur in individuals with normal skin, with skin barrier disturbance, or as a part of the symptoms associated with facial dermatoses such as rosacea, atopic dermatitis and psoriasis. Although experimental studies are still pending, the symptoms of sensitive skin suggest the involvement of cutaneous nerve fibres and neuronal, as well as epidermal, thermochannels. Many individuals with sensitive skin report worsening symptoms due to environmental factors. It is thought that this might be attributed to the thermochannel TRPV1, as it typically responds to exogenous, endogenous, physical and chemical stimuli. Barrier disruptions and immune mechanisms may also be involved. This review summarizes current knowledge on the epidemiology, potential mechanisms, clinics and therapy of sensitive skin.
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Affiliation(s)
- L Misery
- Department of Dermatology, University Hospital, Brest, France
| | - K Loser
- Department of Dermatology, University of Münster, Münster, Germany
| | - S Ständer
- Center for Chronic Pruritus (KCP), University of Münster, Münster, Germany
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92
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Sukul A, Poddar SK, Saha SK, Das SC. Synthesis and characterization of cobalt and manganese complexes of indomethacin and comparative study of local analgesic, anti-inflammatory, and anti-ulcerogenic properties. RUSS J GEN CHEM+ 2016. [DOI: 10.1134/s1070363216080260] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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93
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Austah ON, Ruparel NB, Henry MA, Fajardo RJ, Schmitz JE, Diogenes A. Capsaicin-sensitive Innervation Modulates the Development of Apical Periodontitis. J Endod 2016; 42:1496-502. [PMID: 27523907 DOI: 10.1016/j.joen.2016.06.009] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2016] [Revised: 06/07/2016] [Accepted: 06/16/2016] [Indexed: 01/04/2023]
Abstract
INTRODUCTION Nociceptive neurons play a critical role in the detection of stimuli evoking actual or potential tissue injury. In addition, they are involved in neurogenic inflammation by the peripheral release of neuropeptides such as calcitonin gene-related peptide (CGRP). The dental pulp and periradicular tissues are innervated by capsaicin-sensitive neurons known to release CGRP. However, the role of these capsaicin-sensitive neurons in the development of apical periodontitis is largely unknown. The aim of this study was to evaluate the contribution of peptidergic neurons to the development of apical periodontitis. METHODS Neonatal Sprague-Dawley rats were injected with vehicle (control group) or a single subcutaneous capsaicin dose to cause the selective ablation of peptidergic neurons (neonatal capsaicin group). Ablation of capsaicin-sensitive neurons was verified with confocal microscopy, capsaicin-induced eye-wipe nocifensive behavior test, and by measurement of immunoreactive CGRP levels in the dental pulp. Five weeks after ablation, standardized pulp exposures were made in the mandibular left first molars. Mandibles were harvested at 7, 14, 21, and 28 days after pulp exposure and imaged with micro-computed tomography (μCT) to quantify apical lesion volume. Data were analyzed by using 2-way ANOVA analysis with Bonferroni post hoc test. RESULTS Rats in the control group displayed a robust capsaicin-induced nocifensive behavior, which was nearly abolished in the neonatal capsaicin group. In addition, the neonatal capsaicin group showed a significant depletion of susceptible neurons and CGRP in the dental pulp compared with control. Importantly, micro-computed tomography analysis showed larger periradicular lesions at 7 and 14 days after pulp exposure in the neonatal capsaicin group when compared with control. CONCLUSIONS Results identify a protective role for capsaicin-sensitive neurons in the initial phase of apical periodontitis. Thus, interventions or disorders that alter activity of capsaicin-sensitive fibers are likely to alter the development of apical periodontitis.
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Affiliation(s)
- Obadah N Austah
- Department of Endodontics, University of Texas Health Science Center at San Antonio, San Antonio, Texas; Department of Endodontics, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Nikita B Ruparel
- Department of Endodontics, University of Texas Health Science Center at San Antonio, San Antonio, Texas
| | - Michael A Henry
- Department of Endodontics, University of Texas Health Science Center at San Antonio, San Antonio, Texas
| | - Roberto J Fajardo
- Department of Orthopedics, University of Texas Health Science Center at San Antonio, San Antonio, Texas
| | - James E Schmitz
- Department of Orthopedics, University of Texas Health Science Center at San Antonio, San Antonio, Texas
| | - Anibal Diogenes
- Department of Endodontics, University of Texas Health Science Center at San Antonio, San Antonio, Texas.
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94
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Andoh T, Sakamoto A, Kuraishi Y. 5-HT1A receptor agonists, xaliproden and tandospirone, inhibit the increase in the number of cutaneous mast cells involved in the exacerbation of mechanical allodynia in oxaliplatin-treated mice. J Pharmacol Sci 2016; 131:284-7. [PMID: 27562704 DOI: 10.1016/j.jphs.2016.07.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Revised: 07/09/2016] [Accepted: 07/27/2016] [Indexed: 10/21/2022] Open
Abstract
Oxaliplatin causes peripheral neuropathy as a major dose-limiting side effect, and the control of this neuropathy is difficult. This study was designed to investigate whether prophylactic repetitive administration of 5-HT1A receptor agonists inhibits oxaliplatin-induced mechanical allodynia in mice. Repetitive administration of 5-HT1A receptor agonists (xaliproden and tandospirone) inhibited mechanical allodynia induced by a single intraperitoneal injection of oxaliplatin. These agonists also inhibited oxaliplatin-induced mast cell migration, which is involved in the induction of mechanical allodynia. These results suggest that the prophylactic repetitive administration of 5-HT1A receptor agonists attenuates oxaliplatin-induced mechanical allodynia by inhibiting the cutaneous mast cell migration.
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Affiliation(s)
- Tsugunobu Andoh
- Department of Applied Pharmacology, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama 930-0194, Japan.
| | - Ayumi Sakamoto
- Department of Applied Pharmacology, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama 930-0194, Japan
| | - Yasushi Kuraishi
- Research Administration Division, Tokyo Medical and Dental University, Tokyo 113-8510, Japan
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95
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Assas MB, Wakid MH, Zakai HA, Miyan JA, Pennock JL. Transient receptor potential vanilloid 1 expression and function in splenic dendritic cells: a potential role in immune homeostasis. Immunology 2016; 147:292-304. [PMID: 26643862 DOI: 10.1111/imm.12562] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Revised: 10/26/2015] [Accepted: 11/16/2015] [Indexed: 01/08/2023] Open
Abstract
Neuro-immune interactions, particularly those driven by neuropeptides, are increasingly implicated in immune responses. For instance, triggering calcium-channel transient receptor potential vanilloid 1 (TRPV1) on sensory nerves induces the release of calcitonin-gene-related peptide (CGRP), a neuropeptide known to moderate dendritic cell activation and T helper cell type 1 polarization. Despite observations that CGRP is not confined to the nervous system, few studies have addressed the possibility that immune cells can respond to well-documented 'neural' ligands independently of peripheral nerves. Here we have identified functionally relevant TRPV1 on primary antigen-presenting cells of the spleen and have demonstrated both calcium influx and CGRP release in three separate strains of mice using natural agonists. Furthermore, we have shown down-regulation of activation markers CD80/86 on dendritic cells, and up-regulation of interleukin-6 and interleukin-10 in response to CGRP treatment. We suggest that dendritic cell responses to neural ligands can amplify neuropeptide release, but more importantly that variability in CGRP release across individuals may have important implications for immune cell homeostasis.
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Affiliation(s)
- Mushref Bakri Assas
- Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Saudi Arabia.,Visiting Scientist, Faculty of Medicine and Human Sciences, University of Manchester, Manchester, UK
| | - Majed H Wakid
- Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Haytham A Zakai
- Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Jaleel A Miyan
- Faculty of Life Sciences, University of Manchester, Manchester, UK
| | - Joanne L Pennock
- Institute of Inflammation & Repair, Faculty of Medicine and Human Sciences, University of Manchester, Manchester, UK
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96
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Raap U, Papakonstantinou E, Metz M, Lippert U, Schmelz M. Aktuelles zur kutanen Neurobiologie von Pruritus. Hautarzt 2016; 67:595-600. [DOI: 10.1007/s00105-016-3838-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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97
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Li DG, Du HY, Gerhard S, Imke M, Liu W. Inhibition of TRPV1 prevented skin irritancy induced by phenoxyethanol. A preliminary in vitro and in vivo study. Int J Cosmet Sci 2016; 39:11-16. [PMID: 27168163 DOI: 10.1111/ics.12340] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2016] [Accepted: 05/06/2016] [Indexed: 01/20/2023]
Abstract
BACKGROUND Phenoxyethanol is a widely used preservative in personal care products. Transient receptor potential vanilloid 1 (TRPV1) on cell membrane is activated by TRPV1 agonist capsaicin resulting in an opening of the channel for calcium influx, which is linked with neurosensory sensations characterized by itching, burning and stinging of skin. Whether uncomfortable skin sensations caused by phenoxyethanol claimed by people having sensitive skin are also due to activation of TRPV1 has not been reported in the literature. OBJECTIVE The aim of this study was to evaluate whether the TRPV1 is involved in the induction of itching and burning sensation by phenoxyethanol. METHODS AND MATERIALS The effect of phenoxyethanol on TRPV1 was assessed in vitro on HaCaT cells. The activation of TRPV1 and its inhibition by a TRPV1 antagonist were evaluated by cellular calcium influx. TRPV1 protein expression was also investigated by Western blot. In vivo in a split-face study, phenoxyethanol formulated at 1% was compared to a formulation additionally containing a TRPV1 antagonist. By applying the formulations to the nasolabial fold, the scores of phenoxyethanol-induced sensations were compared to those of the TRPV1 antagonist. RESULTS In vitro phenoxyethanol induced calcium influx in HaCaT cells in a dose-dependent manner after 20 min. This effect was abolished by a solution containing the TRPV1 antagonist trans-tert-butyl cyclohexanol (ID1609). Phenoxyethanol had no effect on the expression of TRPV1, whereas capsaicin caused a significant downregulation of this receptor in the same experiment. In vivo 1% phenoxyethanol induced a skin burning and itching sensation in a cohort of 60 of 243 Chinese female subjects being sensitive to phenoxyethanol discomfort. The uncomfortable skin sensations were significantly inhibited by ID1609. CONCLUSIONS Different to capsaicin, phenoxyethanol did not downregulate the expression of TRPV1 in HaCaT cells, suggesting that different regulatory mechanisms may exist for capsaicin and phenoxyethanol. Our experiments demonstrated that phenoxyethanol induces skin misperception and uncomfortable skin sensations like itching and burning comparable to capsaicin via activating TRPV1. The stimulation was inhibited by blocking TRPV1 with ID1609. The present data strengthened hitherto studies that TRPV1 plays a critical role in sensitive skin.
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Affiliation(s)
- D-G Li
- Department of Dermatology, Xijing Hospital, the Fourth Military Medical University, Xi'an, Shanxi, China.,Department of Dermatology, The Air Force General Hospital of PLA, Fucheng Road No. 30, Beijing, China
| | - H-Y Du
- Department of Dermatology, The Air Force General Hospital of PLA, Fucheng Road No. 30, Beijing, China
| | - S Gerhard
- Explorative Reseach Scent & Care, Innovation Life Essentials, Symrise Co. Lt, Muhlenfeldstr, Holzminden, Germany
| | - M Imke
- Explorative Reseach Scent & Care, Innovation Life Essentials, Symrise Co. Lt, Muhlenfeldstr, Holzminden, Germany
| | - W Liu
- Department of Dermatology, The Air Force General Hospital of PLA, Fucheng Road No. 30, Beijing, China
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98
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Abstract
Itch is a unique sensation associated with the scratch reflex. Although the scratch reflex plays a protective role in daily life by removing irritants, chronic itch remains a clinical challenge. Despite urgent clinical need, itch has received relatively little research attention and its mechanisms have remained poorly understood until recently. The goal of the present review is to summarize our current understanding of the mechanisms of acute as well as chronic itch and classifications of the primary itch populations in relationship to transient receptor potential (Trp) channels, which play pivotal roles in multiple somatosensations. The convergent involvement of Trp channels in diverse itch signaling pathways suggests that Trp channels may serve as promising targets for chronic itch treatments.
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Affiliation(s)
- Shuohao Sun
- The Solomon H. Snyder Department of Neuroscience, Center for Sensory Biology, Johns Hopkins University, School of Medicine, Baltimore, MD, 21205, USA
| | - Xinzhong Dong
- The Solomon H. Snyder Department of Neuroscience, Center for Sensory Biology, Johns Hopkins University, School of Medicine, Baltimore, MD, 21205, USA.
- Howard Hughes Medical Institute, Johns Hopkins University, School of Medicine, Baltimore, MD, 21205, USA.
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99
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Sulzberger M, Worthmann AC, Holtzmann U, Buck B, Jung K, Schoelermann A, Rippke F, Stäb F, Wenck H, Neufang G, Grönniger E. Effective treatment for sensitive skin: 4-t-butylcyclohexanol and licochalcone A. J Eur Acad Dermatol Venereol 2016; 30 Suppl 1:9-17. [DOI: 10.1111/jdv.13529] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/27/2015] [Indexed: 11/29/2022]
Affiliation(s)
- M. Sulzberger
- Research & Development; Beiersdorf AG; Hamburg Germany
| | | | - U. Holtzmann
- Research & Development; Beiersdorf AG; Hamburg Germany
| | - B. Buck
- Research & Development; Beiersdorf AG; Hamburg Germany
| | - K.A. Jung
- Research & Development; Beiersdorf AG; Hamburg Germany
| | | | - F. Rippke
- Research & Development; Beiersdorf AG; Hamburg Germany
| | - F. Stäb
- Research & Development; Beiersdorf AG; Hamburg Germany
| | - H. Wenck
- Research & Development; Beiersdorf AG; Hamburg Germany
| | - G. Neufang
- Research & Development; Beiersdorf AG; Hamburg Germany
| | - E. Grönniger
- Research & Development; Beiersdorf AG; Hamburg Germany
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100
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Involvement of mast cells and proteinase-activated receptor 2 in oxaliplatin-induced mechanical allodynia in mice. Pharmacol Res 2016; 105:84-92. [PMID: 26804251 DOI: 10.1016/j.phrs.2016.01.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Revised: 01/07/2016] [Accepted: 01/12/2016] [Indexed: 12/12/2022]
Abstract
The chemotherapeutic agent oxaliplatin induces neuropathic pain, a dose-limiting side effect, but the underlying mechanisms are not fully understood. Here, we show the potential involvement of cutaneous mast cells in oxaliplatin-induced mechanical allodynia in mice. A single intraperitoneal injection of oxaliplatin induced mechanical allodynia, which peaked on day 10 after injection. Oxaliplatin-induced mechanical allodynia was almost completely prevented by congenital mast cell deficiency. The numbers of total and degranulated mast cells was significantly increased in the skin after oxaliplatin administration. Repetitive topical application of the mast cell stabilizer azelastine hydrochloride inhibited mechanical allodynia and the degranulation of mast cells without affecting the number of mast cells in oxaliplatin-treated mice. The serine protease inhibitor camostat mesilate and the proteinase-activated receptor 2 (PAR2) antagonist FSLLRY-NH2 significantly inhibited oxaliplatin-induced mechanical allodynia. However, it was not inhibited by the H1 histamine receptor antagonist terfenadine. Single oxaliplatin administration increased the activity of cutaneous serine proteases, which was attenuated by camostat and mast cell deficiency. Depletion of the capsaicin-sensitive primary afferents by neonatal capsaicin treatment almost completely prevented oxaliplatin-induced mechanical allodynia, the increase in the number of mast cells, and the activity of cutaneous serine proteases. These results suggest that serine protease(s) released from mast cells and PAR2 are involved in oxaliplatin-induced mechanical allodynia. Therefore, oxaliplatin may indirectly affect the functions of mast cells through its action on capsaicin-sensitive primary afferents.
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