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Orján EM, Kormányos ES, Fűr GM, Dombi Á, Bálint ER, Balla Z, Balog BA, Dágó Á, Totonji A, Bátai ZI, Jurányi EP, Ditrói T, Al-Omari A, Pozsgai G, Kormos V, Nagy P, Pintér E, Rakonczay Z, Kiss L. The anti-inflammatory effect of dimethyl trisulfide in experimental acute pancreatitis. Sci Rep 2023; 13:16813. [PMID: 37798377 PMCID: PMC10556037 DOI: 10.1038/s41598-023-43692-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Accepted: 09/27/2023] [Indexed: 10/07/2023] Open
Abstract
Various organosulfur compounds, such as dimethyl trisulfide (DMTS), display anti-inflammatory properties. We aimed to examine the effects of DMTS on acute pancreatitis (AP) and its mechanism of action in both in vivo and in vitro studies. AP was induced in FVB/n mice or Wistar rats by caerulein, ethanol-palmitoleic acid, or L-ornithine-HCl. DMTS treatments were administered subcutaneously. AP severity was assessed by pancreatic histological scoring, pancreatic water content, and myeloperoxidase activity measurements. The behaviour of animals was followed. Pancreatic heat shock protein 72 (HSP72) expression, sulfide, and protein persulfidation were measured. In vitro acinar viability, intracellular Ca2+ concentration, and reactive oxygen species production were determined. DMTS dose-dependently decreased the severity of AP. It declined the pancreatic infiltration of leukocytes and cellular damage in mice. DMTS upregulated the HSP72 expression during AP and elevated serum sulfide and low molecular weight persulfide levels. DMTS exhibited cytoprotection against hydrogen peroxide and AP-inducing agents. It has antioxidant properties and modulates physiological but not pathophysiological Ca2+ signalling. Generally, DMTS ameliorated AP severity and protected pancreatic acinar cells. Our findings indicate that DMTS is a sulfur donor with anti-inflammatory and antioxidant effects, and organosulfur compounds require further investigation into this potentially lethal disease.
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Affiliation(s)
- Erik Márk Orján
- Department of Pathophysiology, University of Szeged, Semmelweis U. 1, 6725, Szeged, Hungary
| | - Eszter Sára Kormányos
- Department of Pathophysiology, University of Szeged, Semmelweis U. 1, 6725, Szeged, Hungary
| | | | - Ágnes Dombi
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Pécs, Hungary
| | - Emese Réka Bálint
- Department of Pathophysiology, University of Szeged, Semmelweis U. 1, 6725, Szeged, Hungary
| | - Zsolt Balla
- Department of Pathophysiology, University of Szeged, Semmelweis U. 1, 6725, Szeged, Hungary
| | - Beáta Adél Balog
- Department of Pathophysiology, University of Szeged, Semmelweis U. 1, 6725, Szeged, Hungary
| | - Ágnes Dágó
- Department of Pathophysiology, University of Szeged, Semmelweis U. 1, 6725, Szeged, Hungary
| | - Ahmad Totonji
- Department of Pathophysiology, University of Szeged, Semmelweis U. 1, 6725, Szeged, Hungary
| | - Zoárd István Bátai
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Pécs, Hungary
| | - Eszter Petra Jurányi
- Department of Molecular Immunology and Toxicology and the National Tumor Biology Laboratory, National Institute of Oncology, Budapest, Hungary
- Doctoral School of Molecular Medicine, Semmelweis University, Budapest, Hungary
| | - Tamás Ditrói
- Department of Molecular Immunology and Toxicology and the National Tumor Biology Laboratory, National Institute of Oncology, Budapest, Hungary
| | - Ammar Al-Omari
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Pécs, Hungary
| | - Gábor Pozsgai
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Pécs, Hungary
| | - Viktória Kormos
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Pécs, Hungary
| | - Péter Nagy
- Department of Molecular Immunology and Toxicology and the National Tumor Biology Laboratory, National Institute of Oncology, Budapest, Hungary
- Department of Anatomy and Histology, ELKH Laboratory of Redox Biology, University of Veterinary Medicine, Budapest, Hungary
- Chemistry Institute, University of Debrecen, Debrecen, Hungary
| | - Erika Pintér
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Pécs, Hungary
| | - Zoltán Rakonczay
- Department of Pathophysiology, University of Szeged, Semmelweis U. 1, 6725, Szeged, Hungary.
| | - Lóránd Kiss
- Department of Pathophysiology, University of Szeged, Semmelweis U. 1, 6725, Szeged, Hungary.
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Varga-Szilay Z, Pozsgai G. Plant growers' environmental consciousness may not be enough to mitigate pollinator declines: a questionnaire-based case study in Hungary. Pest Manag Sci 2023; 79:1284-1294. [PMID: 36334003 DOI: 10.1002/ps.7277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2022] [Revised: 09/14/2022] [Accepted: 11/05/2022] [Indexed: 06/16/2023]
Abstract
BACKGROUND Pesticides are one of the most important anthropogenic-related stressors. In times of global pollinator decline, the role of integrated farming and urban gardens in supporting wild pollinators is becoming increasingly important. We circulated an online questionnaire to survey plant protection practices among Hungarian farmers and garden owners with a particular emphasis on pollinator protection. RESULTS We found that plant growers rely heavily on pesticide use, and pesticides are used widely in otherwise pollinator-friendly gardens. Whether pesticide use practices were driven by expert opinion and respondent gender were the best predictors of pesticide use. Although most respondents supported pollinators, pesticides are also used widely among home garden owners, which can pose a non-evident ecological trap for pollinator populations in the gardens. CONCLUSION Special attention should be paid to implementing measures to reduce pesticide use not only in farmland, but also in home gardens. Environmental education and financial support through agroecological schemes could efficiently promote the transition away from pesticide use. However, whereas farmers can be encouraged to reduce pesticide use mostly by expert advice, garden owners are likely to rely on more conventional information channels. The attitudes of Hungarian plant growers can provide an insight into pesticide use practices of Central and Eastern European countries, but similar surveys are needed across Europe for a complete understanding of broad-scale processes. This work lays the foundations for similar studies that can inform and facilitate the transformation to pesticide-free farming and gardening. © 2022 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
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Affiliation(s)
- Zsófia Varga-Szilay
- Doctoral School of Biology, Institute of Biology, ELTE Eötvös Loránd University, Budapest, Hungary
| | - Gábor Pozsgai
- cE3c - Centre for Ecology, Evolution and Environmental Changes/Azorean Biodiversity Group, CHANGE - Global Change and Sustainability Institute, Departamento de Ciências e Engenharia do Ambiente, Universidade dos Açores, Açores, Portugal
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László S, Bátai IZ, Berkó S, Csányi E, Dombi Á, Pozsgai G, Bölcskei K, Botz L, Wagner Ö, Pintér E. Development of Capsaicin-Containing Analgesic Silicone-Based Transdermal Patches. Pharmaceuticals (Basel) 2022; 15:ph15101279. [PMID: 36297391 PMCID: PMC9611826 DOI: 10.3390/ph15101279] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 09/29/2022] [Accepted: 10/13/2022] [Indexed: 12/03/2022] Open
Abstract
Transdermal therapeutic systems (TTSs) enable convenient dosing in drug therapy. Modified silicone-polymer-based patches are well-controlled and cost-effective matrix diffusion systems. In the present study, we investigated the substance release properties, skin penetration, and analgesic effect of this type of TTS loaded with low-dose capsaicin. Release properties were measured in Franz diffusion cell and continuous flow-through cell approaches. Capsaicin was detected with HPLC-UV and UV spectrophotometry. Raman spectroscopy was conducted on human skin samples exposed to the TTS. A surgical incision or carrageenan injection was performed on one hind paw of male Wistar rats. TTSs were applied to the epilated dorsal skin. Patches were kept on the animals for 6 h. The thermal hyperalgesia and mechanical pain threshold of the hind paws were detected. Patches exhibited controlled, zero-order kinetic capsaicin release. According to the Raman mapping, capsaicin penetrated into the epidermis and dermis of human skin, where the target receptors are expressed. The thermal pain threshold drop of the operated rat paws was reversed by capsaicin treatment compared to that of animals treated with control patches. It was concluded that our modified silicone-polymer-based capsaicin-containing TTS is suitable for the relief of traumatic and inflammatory pain.
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Affiliation(s)
- Szabolcs László
- Department of Inorganic and Analytical Chemistry, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, Műegyetem rkp. 3, H-1111 Budapest, Hungary
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Szigeti u. 12, H-7624 Pécs, Hungary
| | - István Z. Bátai
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Szigeti u. 12, H-7624 Pécs, Hungary
- Molecular Pharmacology Research Group, Szentágothai Research Centre, University of Pécs, Ifjúság ú. 20, H-7624 Pécs, Hungary
| | - Szilvia Berkó
- Institute of Pharmaceutical Technology and Regulatory Affairs, Faculty of Pharmacy, University of Szeged, Eötvös str. 6, H-6720 Szeged, Hungary
| | - Erzsébet Csányi
- Institute of Pharmaceutical Technology and Regulatory Affairs, Faculty of Pharmacy, University of Szeged, Eötvös str. 6, H-6720 Szeged, Hungary
| | - Ágnes Dombi
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Szigeti u. 12, H-7624 Pécs, Hungary
- Molecular Pharmacology Research Group, Szentágothai Research Centre, University of Pécs, Ifjúság ú. 20, H-7624 Pécs, Hungary
| | - Gábor Pozsgai
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Szigeti u. 12, H-7624 Pécs, Hungary
- Molecular Pharmacology Research Group, Szentágothai Research Centre, University of Pécs, Ifjúság ú. 20, H-7624 Pécs, Hungary
- Correspondence: ; Tel.: +36-72-536-217
| | - Kata Bölcskei
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Szigeti u. 12, H-7624 Pécs, Hungary
- Molecular Pharmacology Research Group, Szentágothai Research Centre, University of Pécs, Ifjúság ú. 20, H-7624 Pécs, Hungary
| | - Lajos Botz
- Department of Pharmaceutics and Central Clinical Pharmacy, Faculty of Pharmacy, University of Pécs, Honvéd u. 3., H-7624 Pécs, Hungary
| | - Ödön Wagner
- Department of Inorganic and Analytical Chemistry, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, Műegyetem rkp. 3, H-1111 Budapest, Hungary
| | - Erika Pintér
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Szigeti u. 12, H-7624 Pécs, Hungary
- Molecular Pharmacology Research Group, Szentágothai Research Centre, University of Pécs, Ifjúság ú. 20, H-7624 Pécs, Hungary
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4
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Pozsgai G, Ben Fekih I, Kohnen MV, Amrani S, Bérces S, Fülöp D, Jaber MYM, Meyling NV, Ruszkiewicz-Michalska M, Pfliegler WP, Sánchez-García FJ, Zhang J, Rensing C, Lövei GL, You M. Associations between carabid beetles and fungi in the light of 200 years of published literature. Sci Data 2021; 8:294. [PMID: 34737321 PMCID: PMC8569211 DOI: 10.1038/s41597-021-01072-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Accepted: 10/08/2021] [Indexed: 12/01/2022] Open
Abstract
Describing and conserving ecological interactions woven into ecosystems is one of the great challenges of the 21st century. Here, we present a unique dataset compiling the biotic interactions between two ecologically and economically important taxa: ground beetles (Coleoptera: Carabidae) and fungi. The resulting dataset contains the carabid-fungus associations collected from 392 scientific publications, 129 countries, mostly from the Palearctic region, published over a period of 200 years. With an updated taxonomy to match the currently accepted nomenclature, 3,378 unique associations among 5,564 records were identified between 1,776 carabid and 676 fungal taxa. Ectoparasitic Laboulbeniales were the most frequent fungal group associated with carabids, especially with Trechinae. The proportion of entomopathogens was low. Three different formats of the data have been provided along with an interactive data digest platform for analytical purposes. Our database summarizes the current knowledge on biotic interactions between insects and fungi, while offering a valuable resource to test large-scale hypotheses on those interactions. Measurement(s) | species associations | Technology Type(s) | digital curation | Factor Type(s) | associations between Carabidae and Fungi | Sample Characteristic - Organism | Carabidae • Fungi • Laboulbeniales | Sample Characteristic - Location | global |
Machine-accessible metadata file describing the reported data: 10.6084/m9.figshare.14602770
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Affiliation(s)
- Gábor Pozsgai
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China. .,Joint International Research Laboratory of Ecological Pest Control, Ministry of Education, Fuzhou, 350002, China. .,CE3C - Centre for Ecology, Evolution and Environmental Changes, Azorean Biodiversity Group and Universidade dos Açores, Angra do Heroísmo, 9700-042, Azores, Portugal.
| | - Ibtissem Ben Fekih
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China.,Institute of Environmental Microbiology, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Markus V Kohnen
- Basic Forestry and Proteomics Research Center, College of Life Science, Fujian Provincial Key Laboratory of Haixia Applied Plant Systems Biology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Said Amrani
- Laboratoire de Biologie et de Physiologie des Organismes, Faculté des Sciences Biologiques, Université des Sciences et de la Technologie Houari Boumediène, BP 32 El Alia, Alger, 16111, Algeria
| | - Sándor Bérces
- Duna-Ipoly National Park Directorate, Költő u. 21, H-1121, Budapest, Hungary.,Juhász-Nagy Pál Doctoral School, University of Debrecen, Egyetem tér 1, H-4032, Debrecen, Hungary
| | - Dávid Fülöp
- Department of Zoology, Plant Protection Institute, Centre for Agricultural Research, Nagykovácsi út 26-30, H-1029, Budapest, Hungary
| | - Mohammed Y M Jaber
- Fujian University Key Laboratory for Plant-Microbe Interaction, College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Nicolai Vitt Meyling
- Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, 1871, Frederiksberg C, Denmark
| | - Malgorzata Ruszkiewicz-Michalska
- Department of Algology and Mycology Faculty of Biology and Environmental Protection, University of Łódź, Banacha 12/16, PL-90-237, Łódź, Poland
| | - Walter P Pfliegler
- Department of Molecular Biotechnology and Microbiology, University of Debrecen, Egyetem tér 1, Debrecen, H-4032, Hungary
| | - Francisco Javier Sánchez-García
- Fujian Provincial Key Laboratory of Insect Ecology, College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou, 350002, China.,Área de Biología Animal, Departamento de Zoología y Antropología Física, Facultad de Veterinaria, Universidad de Murcia, Murcia, 30100, Spain
| | - Jie Zhang
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Christopher Rensing
- Institute of Environmental Microbiology, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, 350002, China.
| | - Gábor L Lövei
- Joint International Research Laboratory of Ecological Pest Control, Ministry of Education, Fuzhou, 350002, China.,Department of Agroecology, Aarhus University, Flakkebjerg Research Centre, Forsøgsvej 1, DK-4200, Slagelse, Denmark
| | - Minsheng You
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China. .,Joint International Research Laboratory of Ecological Pest Control, Ministry of Education, Fuzhou, 350002, China.
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5
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Pozsgai G, Lövei GL, Vasseur L, Gurr G, Batáry P, Korponai J, Littlewood NA, Liu J, Móra A, Obrycki J, Reynolds O, Stockan JA, VanVolkenburg H, Zhang J, Zhou W, You M. Irreproducibility in searches of scientific literature: A comparative analysis. Ecol Evol 2021; 11:14658-14668. [PMID: 34765132 PMCID: PMC8571571 DOI: 10.1002/ece3.8154] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Revised: 08/25/2021] [Accepted: 08/27/2021] [Indexed: 11/29/2022] Open
Abstract
Repeatability is the cornerstone of science, and it is particularly important for systematic reviews. However, little is known on how researchers' choice of database, and search platform influence the repeatability of systematic reviews. Here, we aim to unveil how the computer environment and the location where the search was initiated from influence hit results.We present a comparative analysis of time-synchronized searches at different institutional locations in the world and evaluate the consistency of hits obtained within each of the search terms using different search platforms.We revealed a large variation among search platforms and showed that PubMed and Scopus returned consistent results to identical search strings from different locations. Google Scholar and Web of Science's Core Collection varied substantially both in the number of returned hits and in the list of individual articles depending on the search location and computing environment. Inconsistency in Web of Science results has most likely emerged from the different licensing packages at different institutions.To maintain scientific integrity and consistency, especially in systematic reviews, action is needed from both the scientific community and scientific search platforms to increase search consistency. Researchers are encouraged to report the search location and the databases used for systematic reviews, and database providers should make search algorithms transparent and revise access rules to titles behind paywalls. Additional options for increasing the repeatability and transparency of systematic reviews are storing both search metadata and hit results in open repositories and using Application Programming Interfaces (APIs) to retrieve standardized, machine-readable search metadata.
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Affiliation(s)
- Gábor Pozsgai
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan CropsInstitute of Applied EcologyFujian Agriculture and Forestry UniversityFuzhouChina
- Joint International Research Laboratory of Ecological Pest ControlMinistry of EducationFuzhouChina
| | - Gábor L. Lövei
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan CropsInstitute of Applied EcologyFujian Agriculture and Forestry UniversityFuzhouChina
- Joint International Research Laboratory of Ecological Pest ControlMinistry of EducationFuzhouChina
- Department of AgroecologyFlakkebjerg Research CentreAarhus UniversitySlagelseDenmark
| | - Liette Vasseur
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan CropsInstitute of Applied EcologyFujian Agriculture and Forestry UniversityFuzhouChina
- Joint International Research Laboratory of Ecological Pest ControlMinistry of EducationFuzhouChina
- UNESCO Chair on Community Sustainability: From Local to GlobalDepartment of Biological ScienceBrock UniversitySt. CatharinesONCanada
| | - Geoff Gurr
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan CropsInstitute of Applied EcologyFujian Agriculture and Forestry UniversityFuzhouChina
- Joint International Research Laboratory of Ecological Pest ControlMinistry of EducationFuzhouChina
- Graham Centre for Agricultural Innovation (Charles Sturt University and NSW Department of Primary Industries)Charles Sturt UniversityOrangeNSWAustralia
| | - Péter Batáry
- AgroecologyUniversity of GoettingenGoettingenGermany
- “Lendület” Landscape and Conservation EcologyInstitute of Ecology and BotanyCentre for Ecological ResearchVácrátótHungary
| | - János Korponai
- Department of BiologySavaria CampusEötvös Loránd UniversitySzombathelyHungary
- Department of Environmental SciencesSapientia Hungarian University of TransylvaniaCluj‐NapocaRomania
- Department of Water Supply and SewerageFaculty of Water ScienceNational University of Public ServiceBajaHungary
- Aquatic Ecological InstituteCentre for Ecological ResearchBudapestHungary
| | - Nick A. Littlewood
- Department of ZoologyUniversity of CambridgeCambridgeUK
- Department of Rural Land UseSRUCAberdeenUK
| | - Jian Liu
- Graham Centre for Agricultural Innovation (Charles Sturt University and NSW Department of Primary Industries)Charles Sturt UniversityOrangeNSWAustralia
| | - Arnold Móra
- Department of HydrobiologyInstitute of BiologyUniversity of PécsPécsHungary
| | | | - Olivia Reynolds
- Joint International Research Laboratory of Ecological Pest ControlMinistry of EducationFuzhouChina
- CesarParkvilleVICAustralia
- Biosecurity and Food SafetyNSW Department of Primary IndustriesNarellanNSWAustralia
| | - Jenni A. Stockan
- Department of Ecological SciencesThe James Hutton InstituteAberdeenUK
| | - Heather VanVolkenburg
- UNESCO Chair on Community Sustainability: From Local to GlobalDepartment of Biological ScienceBrock UniversitySt. CatharinesONCanada
| | - Jie Zhang
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan CropsInstitute of Applied EcologyFujian Agriculture and Forestry UniversityFuzhouChina
- Joint International Research Laboratory of Ecological Pest ControlMinistry of EducationFuzhouChina
| | - Wenwu Zhou
- State Key Laboratory of Rice BiologyKey Laboratory of Molecular Biology of Crop Pathogens and InsectsMinistry of AgricultureZhejiang UniversityHangzhouChina
| | - Minsheng You
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan CropsInstitute of Applied EcologyFujian Agriculture and Forestry UniversityFuzhouChina
- Joint International Research Laboratory of Ecological Pest ControlMinistry of EducationFuzhouChina
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6
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Szőke É, Bálint M, Hetényi C, Markovics A, Elekes K, Pozsgai G, Szűts T, Kéri G, Őrfi L, Sándor Z, Szolcsányi J, Pintér E, Helyes Z. Small molecule somatostatin receptor subtype 4 (sst 4) agonists are novel anti-inflammatory and analgesic drug candidates. Neuropharmacology 2020; 178:108198. [PMID: 32739276 DOI: 10.1016/j.neuropharm.2020.108198] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Revised: 06/07/2020] [Accepted: 06/10/2020] [Indexed: 12/30/2022]
Abstract
We provided strong proof of concept evidence that somatostatin mediates potent analgesic and anti-inflammatory actions via its receptor subtype 4 (sst4) located both at the periphery and the central nervous system. Therefore, sst4 agonists are promising novel drug candidates for neuropathic pain and neurogenic inflammation, but rational drug design was not possible due to the lack of knowledge about its 3-dimensional structure. We modeled the sst4 receptor structure, described its agonist binding properties, and characterized the binding of our novel small molecule sst4 agonists (4-phenetylamino-7H-pyrrolo[2,3-d]pyrimidine derivatives) using an in silico platform. In addition to the in silico binding data, somatostatin displacement by Compound 1 was demonstrated in the competitive binding assay on sst4-expressing cells. In vivo effects were investigated in rat models of neurogenic inflammation and chronic traumatic neuropathic pain. We defined high- and low-affinity binding pockets of sst4 for our ligands, binding of the highest affinity compounds were similar to that of the reference ligand J-2156. We showed potent G-protein activation with the highest potency of 10 nM EC50 value and highest efficacy of 342%. Oral administration of 100 μg/kg of 5 compounds significantly inhibited acute neurogenic plasma protein extravasation in the paw skin by 40-60%, one candidate abolished and 3 others diminished sciatic nerve-ligation induced neuropathic hyperalgesia by 28-62%. The in silico predictions on sst4-ligands were tested in biological systems. Low oral dose of our novel agonists inhibit neurogenic inflammation and neuropathic pain, which opens promising drug developmental perspectives for these unmet medical need conditions.
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Affiliation(s)
- Éva Szőke
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Pécs, Hungary; János Szentágothai Research Center & Centre for Neuroscience, University of Pécs, Hungary.
| | - Mónika Bálint
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Pécs, Hungary; János Szentágothai Research Center & Centre for Neuroscience, University of Pécs, Hungary
| | - Csaba Hetényi
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Pécs, Hungary; János Szentágothai Research Center & Centre for Neuroscience, University of Pécs, Hungary
| | - Adrienn Markovics
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Pécs, Hungary; János Szentágothai Research Center & Centre for Neuroscience, University of Pécs, Hungary
| | - Krisztián Elekes
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Pécs, Hungary; János Szentágothai Research Center & Centre for Neuroscience, University of Pécs, Hungary
| | - Gábor Pozsgai
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Pécs, Hungary; János Szentágothai Research Center & Centre for Neuroscience, University of Pécs, Hungary
| | | | - György Kéri
- Vichem Chemie Research Ltd, Budapest, Hungary
| | - László Őrfi
- Department of Pharmaceutical Chemistry, Pharmacy Faculty, Semmelweis University, Budapest, Hungary
| | - Zoltán Sándor
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Pécs, Hungary; János Szentágothai Research Center & Centre for Neuroscience, University of Pécs, Hungary
| | - János Szolcsányi
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Pécs, Hungary; János Szentágothai Research Center & Centre for Neuroscience, University of Pécs, Hungary
| | - Erika Pintér
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Pécs, Hungary; János Szentágothai Research Center & Centre for Neuroscience, University of Pécs, Hungary; PharmInVivo Ltd, Pécs, Hungary; Algonist GmbH, Vienna, Austria
| | - Zsuzsanna Helyes
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Pécs, Hungary; János Szentágothai Research Center & Centre for Neuroscience, University of Pécs, Hungary; PharmInVivo Ltd, Pécs, Hungary; Algonist GmbH, Vienna, Austria
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7
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Bátai IZ, Sár CP, Horváth Á, Borbély É, Bölcskei K, Kemény Á, Sándor Z, Nemes B, Helyes Z, Perkecz A, Mócsai A, Pozsgai G, Pintér E. TRPA1 Ion Channel Determines Beneficial and Detrimental Effects of GYY4137 in Murine Serum-Transfer Arthritis. Front Pharmacol 2019; 10:964. [PMID: 31551776 PMCID: PMC6737045 DOI: 10.3389/fphar.2019.00964] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Accepted: 07/29/2019] [Indexed: 01/09/2023] Open
Abstract
Modulation of nociception and inflammation by sulfide in rheumatoid arthritis and activation of transient receptor potential ankyrin 1 (TRPA1) ion channels by sulfide compounds are well documented. The present study aims to investigate TRPA1-mediated effects of sulfide donor GYY4137 in K/BxN serum-transfer arthritis, a rodent model of rheumatoid arthritis. TRPA1 and somatostatin sst4 receptor wild-type (WT) and knockout mice underwent K/BxN serum transfer and were treated daily with GYY4137. Functional and biochemical signs of inflammation were recorded, together with histological characterization. These included detection of hind paw mechanical hyperalgesia by dynamic plantar esthesiometry, hind paw volume by plethysmometry, and upside-down hanging time to failure. Hind paw erythema, edema, and passive movement range of tibiotarsal joints were scored. Somatostatin release from sensory nerve endings of TRPA1 wild-type and knockout mice in response to polysulfide was detected by radioimmunoassay. Polysulfide formation from GYY4137 was uncovered by cold cyanolysis. GYY4137 aggravated mechanical hyperalgesia in TRPA1 knockout mice but ameliorated it in wild-type ones. Arthritis score was lowered by GYY4137 in TRPA1 wild-type animals. Increased myeloperoxidase activity, plasma extravasation, and subcutaneous MIP-2 levels of hind paws were detected in TRPA1 knockout mice upon GYY4137 treatment. Genetic lack of sst4 receptors did not alter mechanical hyperalgesia, edema formation, hanging performance, arthritis score, plasma extravasation, or myeloperoxidase activity. TRPA1 WT animals exhibited smaller cartilage destruction upon GYY4137 administration. Sodium polysulfide caused TRPA1-dependent somatostatin release from murine nerve endings. Sulfide released from GYY4137 is readily converted into polysulfide by hypochlorite. Polysulfide potently activates human TRPA1 receptors expressed in Chinese hamster ovary (CHO) cells. According to our data, the protective effect of GYY4137 is mediated by TRPA1, while detrimental actions are independent of the ion channel in the K/BxN serum-transfer arthritis model in mice. At acidic pH in inflamed tissue sulfide is released from GYY4137 and reacts with neutrophil-derived hypochlorite. Resulting polysulfide might be responsible for TRPA1-mediated antinociceptive and anti-inflammatory as well as TRPA1-independent pro-inflammatory effects.
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Affiliation(s)
- István Z Bátai
- Department of Pharmacology and Pharmacotherapy, Medical School and János Szentágothai Research Centre & Centre for Neuroscience, University of Pécs, Pécs, Hungary
| | - Cecília Pápainé Sár
- Department of Organic and Pharmacological Chemistry, Medical School, University of Pécs, Pécs, Hungary
| | - Ádám Horváth
- Department of Pharmacology and Pharmacotherapy, Medical School and János Szentágothai Research Centre & Centre for Neuroscience, University of Pécs, Pécs, Hungary
| | - Éva Borbély
- Department of Pharmacology and Pharmacotherapy, Medical School and János Szentágothai Research Centre & Centre for Neuroscience, University of Pécs, Pécs, Hungary
| | - Kata Bölcskei
- Department of Pharmacology and Pharmacotherapy, Medical School and János Szentágothai Research Centre & Centre for Neuroscience, University of Pécs, Pécs, Hungary
| | - Ágnes Kemény
- Department of Pharmacology and Pharmacotherapy, Medical School and János Szentágothai Research Centre & Centre for Neuroscience, University of Pécs, Pécs, Hungary.,Department of Medical Biology, Medical School, University of Pécs, Pécs, Hungary
| | - Zoltán Sándor
- Department of Pharmacology and Pharmacotherapy, Medical School and János Szentágothai Research Centre & Centre for Neuroscience, University of Pécs, Pécs, Hungary
| | - Balázs Nemes
- Department of Pharmacology and Pharmacotherapy, Medical School and János Szentágothai Research Centre & Centre for Neuroscience, University of Pécs, Pécs, Hungary
| | - Zsuzsanna Helyes
- Department of Pharmacology and Pharmacotherapy, Medical School and János Szentágothai Research Centre & Centre for Neuroscience, University of Pécs, Pécs, Hungary
| | - Anikó Perkecz
- Department of Pharmacology and Pharmacotherapy, Medical School and János Szentágothai Research Centre & Centre for Neuroscience, University of Pécs, Pécs, Hungary
| | - Attila Mócsai
- Department of Physiology, Faculty of Medicine, Semmelweis University, Budapest, Hungary.,MTA-SE "Lendület" Inflammation Physiology Research Group of the Hungarian Academy of Sciences and the Semmelweis University, Budapest, Hungary
| | - Gábor Pozsgai
- Department of Pharmacology and Pharmacotherapy, Medical School and János Szentágothai Research Centre & Centre for Neuroscience, University of Pécs, Pécs, Hungary
| | - Erika Pintér
- Department of Pharmacology and Pharmacotherapy, Medical School and János Szentágothai Research Centre & Centre for Neuroscience, University of Pécs, Pécs, Hungary
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Wyckhuys KAG, Pozsgai G, Lovei GL, Vasseur L, Wratten SD, Gurr GM, Reynolds OL, Goettel M. Global disparity in public awareness of the biological control potential of invertebrates. Sci Total Environ 2019; 660:799-806. [PMID: 30743965 DOI: 10.1016/j.scitotenv.2019.01.077] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Revised: 01/03/2019] [Accepted: 01/08/2019] [Indexed: 06/09/2023]
Abstract
Invertebrates make up over 95% of animal biodiversity on Earth and contribute to multiple ecosystem services (ES) in natural and human-dominated systems. One such service, biological control (BC) of herbivorous pests, is a core component of sustainable intensification of agriculture, yet its importance is routinely overlooked. Here we report a macro-scale, cross-cultural assessment of the public visibility (or 'salience') of BC invertebrates, using high-throughput analysis of large bodies of digitized text (i.e., 'culturomics'). Using binomial scientific name frequency as proxy for visibility, we compared the extent to which a given species featured in webpages within either scientific media or the entire worldwide web, and in total search volume at varying spatial scale. For a set of 339 BC invertebrate species, scientific and internet coverage averaged 1020 and 1735 webpages, respectively. Substantial variability was recorded among BC taxa with Coleoptera, Hemiptera and Nematoda having comparatively high visibility. Online visibility exhibited large geographical variability ranging from France covering BC invertebrates on average in 1050 webpages versus Thailand or Indonesia on just 31-38. This work represents the first extensive use of culturomics to assess public visibility of insect-mediated ES. As BC uptake is dictated by stakeholders' access to (agro-ecological) information, our work identifies geographically-delineated areas that are differentially attuned to the concept of invertebrate BC, pinpoints opportunities for focusing education campaigns and awareness-raising, enables real-time tracking of BC public appeal, and informs public policy.
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Affiliation(s)
- K A G Wyckhuys
- International Joint Research Laboratory on Ecological Pest Management, Fuzhou, China; University of Queensland, Brisbane, Australia; China Academy of Agricultural Sciences, Beijing, China; Zhejiang University, Hangzhou, China.
| | - G Pozsgai
- International Joint Research Laboratory on Ecological Pest Management, Fuzhou, China
| | - G L Lovei
- International Joint Research Laboratory on Ecological Pest Management, Fuzhou, China; Aarhus University, Slagelse, Denmark
| | - L Vasseur
- International Joint Research Laboratory on Ecological Pest Management, Fuzhou, China; Brock University, St. Catharines, Canada
| | - S D Wratten
- International Joint Research Laboratory on Ecological Pest Management, Fuzhou, China; Lincoln University, Lincoln, New Zealand
| | - G M Gurr
- International Joint Research Laboratory on Ecological Pest Management, Fuzhou, China; Graham Centre for Agricultural Innovation, Wagga Wagga, Australia
| | - O L Reynolds
- International Joint Research Laboratory on Ecological Pest Management, Fuzhou, China; Graham Centre for Agricultural Innovation, Wagga Wagga, Australia; New South Wales Department of Primary Industries, Menangle, Australia
| | - M Goettel
- International Joint Research Laboratory on Ecological Pest Management, Fuzhou, China; Lethbridge Research Centre, Agriculture & Agri-Food, Lethbridge, Canada
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Pozsgai G, Bátai IZ, Pintér E. Effects of sulfide and polysulfides transmitted by direct or signal transduction-mediated activation of TRPA1 channels. Br J Pharmacol 2018; 176:628-645. [PMID: 30292176 PMCID: PMC6346070 DOI: 10.1111/bph.14514] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Revised: 06/22/2018] [Accepted: 09/24/2018] [Indexed: 12/21/2022] Open
Abstract
Hydrogen sulfide (H2S) is a gaseous mediator in various physiological and pathological processes, including neuroimmune modulation, metabolic pathways, cardiovascular system, tumour growth, inflammation and pain. Now the hydrogen polysulfides (H2Sn) have been recognised as signalling molecules modulating ion channels, transcription factors and protein kinases. Transient receptor potential (TRP) cation channels can be activated by mechanical, thermal or chemical triggers. Here, we review the current literature regarding the biological actions of sulfide and polysulfide compounds mediated by TRP channels with special emphasis on the role of TRPA1, best known as ion channels in nociceptors. However, the non‐neuronal TRPA1 channels should also be considered to play regulatory roles. Although sulfide and polysulfide effects in different pathological circumstances and TRPA1‐mediated processes have been investigated intensively, our review attempts to present the first comprehensive overview of the potential crosstalk between TRPA1 channels and sulfide‐activated signalling pathways. Linked Articles This article is part of a themed section on Chemical Biology of Reactive Sulfur Species. To view the other articles in this section visit http://onlinelibrary.wiley.com/doi/10.1111/bph.v176.4/issuetoc
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Affiliation(s)
- Gábor Pozsgai
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Pécs, Hungary
| | - István Zoárd Bátai
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Pécs, Hungary
| | - Erika Pintér
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Pécs, Hungary
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Bátai IZ, Horváth Á, Pintér E, Helyes Z, Pozsgai G. Role of Transient Receptor Potential Ankyrin 1 Ion Channel and Somatostatin sst4 Receptor in the Antinociceptive and Anti-inflammatory Effects of Sodium Polysulfide and Dimethyl Trisulfide. Front Endocrinol (Lausanne) 2018; 9:55. [PMID: 29535682 PMCID: PMC5835328 DOI: 10.3389/fendo.2018.00055] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Transient receptor potential ankyrin 1 (TRPA1) non-selective ligand-gated cation channels are mostly expressed in primary sensory neurons. Polysulfides (POLYs) are Janus-faced substances interacting with numerous target proteins and associated with both protective and detrimental processes. Activation of TRPA1 in sensory neurons, consequent somatostatin (SOM) liberation and action on sst4 receptors have recently emerged as mediators of the antinociceptive effect of organic trisulfide dimethyl trisulfide (DMTS). In the frame of the present study, we set out to compare the participation of this mechanism in antinociceptive and anti-inflammatory effects of inorganic sodium POLY and DMTS in carrageenan-evoked hind-paw inflammation. Inflammation of murine hind paws was induced by intraplantar injection of carrageenan (3% in 30 µL saline). Animals were treated intraperitoneally with POLY (17 µmol/kg) or DMTS (250 µmol/kg) or their respective vehicles 30 min prior paw challenge and six times afterward every 60 min. Mechanical pain threshold and swelling of the paws were measured by dynamic plantar aesthesiometry and plethysmometry at 2, 4, and 6 h after initiation of inflammation. Myeloperoxidase (MPO) activity in the hind paws were detected 6 h after challenge by luminescent imaging. Mice genetically lacking TRPA1 ion channels, sst4 receptors and their wild-type counterparts were used to examine the participation of these proteins in POLY and DMTS effects. POLY counteracted carrageenan-evoked mechanical hyperalgesia in a TRPA1 and sst4 receptor-dependent manner. POLY did not influence paw swelling and MPO activity. DMTS ameliorated all examined inflammatory parameters. Mitigation of mechanical hyperalgesia and paw swelling by DMTS were mediated through sst4 receptors. These effects were present in TRPA1 knockout animals, too. DMTS inhibited MPO activity with no participation of the sensory neuron-SOM axis. While antinociceptive effects of POLY are transmitted by activation of peptidergic nerves via TRPA1, release of SOM and its effect on sst4 receptors, those of DMTS partially rely on SOM release triggered by other routes. SOM is responsible for the inhibition of paw swelling by DMTS, but TRPA1 does not contribute to its release. Modulation of MPO activity by DMTS is independent of TRPA1 and sst4.
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Affiliation(s)
- István Z. Bátai
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Pécs, Hungary
| | - Ádám Horváth
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Pécs, Hungary
| | - Erika Pintér
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Pécs, Hungary
| | - Zsuzsanna Helyes
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Pécs, Hungary
| | - Gábor Pozsgai
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Pécs, Hungary
- *Correspondence: Gábor Pozsgai,
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Horváth Á, Tékus V, Boros M, Pozsgai G, Botz B, Borbély É, Szolcsányi J, Pintér E, Helyes Z. Transient receptor potential ankyrin 1 (TRPA1) receptor is involved in chronic arthritis: in vivo study using TRPA1-deficient mice. Arthritis Res Ther 2016; 18:6. [PMID: 26746673 PMCID: PMC4718022 DOI: 10.1186/s13075-015-0904-y] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Accepted: 12/22/2015] [Indexed: 12/04/2022] Open
Abstract
Background The transient receptor potential ankyrin 1 (TRPA1) is a calcium-permeable cation channel that is expressed on capsaicin-sensitive sensory neurons, endothelial and inflammatory cells. It is activated by a variety of inflammatory mediators, such as methylglyoxal, formaldehyde and hydrogen sulphide. Since only few data are available about the role of TRPA1 in arthritis and related pain, we investigated its involvement in inflammation models of different mechanisms. Methods Chronic arthritis was induced by complete Freund’s adjuvant (CFA), knee osteoarthritis by monosodium iodoacetate (MIA) in TRPA1 knockout (KO) mice and C57Bl/6 wildtype mice. For comparison, carrageenan- and CFA-evoked acute paw and knee inflammatory changes were investigated. Thermonociception was determined on a hot plate, cold tolerance in icy water, mechanonociception by aesthesiometry, paw volume by plethysmometry, knee diameter by micrometry, weight distribution with incapacitance tester, neutrophil myeloperoxidase activity and vascular leakage by in vivo optical imaging, and histopathological alterations by semiquantitative scoring. Results CFA-induced chronic mechanical hypersensitivity, tibiotarsal joint swelling and histopathological alterations, as well as myeloperoxidase activity in the early phase (day 2), and vascular leakage in the later stage (day 7), were significantly reduced in TRPA1 KO mice. Heat and cold sensitivities did not change in this model. Although in TRPA1 KO animals MIA-evoked knee swelling and histopathological destruction were not altered, hypersensitivity and impaired weight bearing on the osteoarthritic limb were significantly decreased. In contrast, carrageenan- and CFA-induced acute inflammation and pain behaviours were not modified by TRPA1 deletion. Conclusions TRPA1 has an important role in chronic arthritis/osteoarthritis and related pain behaviours in the mouse. Therefore, it might be a promising target for novel analgesic/anti-inflammatory drugs.
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Affiliation(s)
- Ádám Horváth
- Department of Pharmacology and Pharmacotherapy, University of Pécs, Medical School, 12 Szigeti Street, Pécs, 7624, Hungary. .,János Szentágothai Research Centre, University of Pécs, 20 Ifjúság Street, Pécs, 7624, Hungary. .,Centre of Neuroscience, University of Pécs, Medical School, Pécs, 20 Ifjúság Street, Pécs, 7624, Hungary.
| | - Valéria Tékus
- Department of Pharmacology and Pharmacotherapy, University of Pécs, Medical School, 12 Szigeti Street, Pécs, 7624, Hungary. .,János Szentágothai Research Centre, University of Pécs, 20 Ifjúság Street, Pécs, 7624, Hungary. .,Centre of Neuroscience, University of Pécs, Medical School, Pécs, 20 Ifjúság Street, Pécs, 7624, Hungary.
| | - Melinda Boros
- Department of Pharmacology and Pharmacotherapy, University of Pécs, Medical School, 12 Szigeti Street, Pécs, 7624, Hungary. .,János Szentágothai Research Centre, University of Pécs, 20 Ifjúság Street, Pécs, 7624, Hungary. .,Centre of Neuroscience, University of Pécs, Medical School, Pécs, 20 Ifjúság Street, Pécs, 7624, Hungary.
| | - Gábor Pozsgai
- Department of Pharmacology and Pharmacotherapy, University of Pécs, Medical School, 12 Szigeti Street, Pécs, 7624, Hungary. .,János Szentágothai Research Centre, University of Pécs, 20 Ifjúság Street, Pécs, 7624, Hungary. .,Centre of Neuroscience, University of Pécs, Medical School, Pécs, 20 Ifjúság Street, Pécs, 7624, Hungary.
| | - Bálint Botz
- Department of Pharmacology and Pharmacotherapy, University of Pécs, Medical School, 12 Szigeti Street, Pécs, 7624, Hungary. .,János Szentágothai Research Centre, University of Pécs, 20 Ifjúság Street, Pécs, 7624, Hungary. .,Centre of Neuroscience, University of Pécs, Medical School, Pécs, 20 Ifjúság Street, Pécs, 7624, Hungary.
| | - Éva Borbély
- Department of Pharmacology and Pharmacotherapy, University of Pécs, Medical School, 12 Szigeti Street, Pécs, 7624, Hungary. .,János Szentágothai Research Centre, University of Pécs, 20 Ifjúság Street, Pécs, 7624, Hungary. .,Centre of Neuroscience, University of Pécs, Medical School, Pécs, 20 Ifjúság Street, Pécs, 7624, Hungary.
| | - János Szolcsányi
- Department of Pharmacology and Pharmacotherapy, University of Pécs, Medical School, 12 Szigeti Street, Pécs, 7624, Hungary. .,János Szentágothai Research Centre, University of Pécs, 20 Ifjúság Street, Pécs, 7624, Hungary. .,Centre of Neuroscience, University of Pécs, Medical School, Pécs, 20 Ifjúság Street, Pécs, 7624, Hungary. .,PharmInVivo Ltd., 10 Szondi György Street, Pécs, 7624, Hungary.
| | - Erika Pintér
- Department of Pharmacology and Pharmacotherapy, University of Pécs, Medical School, 12 Szigeti Street, Pécs, 7624, Hungary. .,János Szentágothai Research Centre, University of Pécs, 20 Ifjúság Street, Pécs, 7624, Hungary. .,Centre of Neuroscience, University of Pécs, Medical School, Pécs, 20 Ifjúság Street, Pécs, 7624, Hungary. .,PharmInVivo Ltd., 10 Szondi György Street, Pécs, 7624, Hungary.
| | - Zsuzsanna Helyes
- Department of Pharmacology and Pharmacotherapy, University of Pécs, Medical School, 12 Szigeti Street, Pécs, 7624, Hungary. .,János Szentágothai Research Centre, University of Pécs, 20 Ifjúság Street, Pécs, 7624, Hungary. .,Centre of Neuroscience, University of Pécs, Medical School, Pécs, 20 Ifjúság Street, Pécs, 7624, Hungary. .,PharmInVivo Ltd., 10 Szondi György Street, Pécs, 7624, Hungary. .,MTA-PTE NAP B Chronic Pain Research Group, 12 Szigeti Street, Pécs, 7624, Hungary.
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Sághy É, Payrits M, Szőke É, Pozsgai G, Pintéra E. Analgesic effect of polysulfide compound dimethyl trisulfide in mild heat injury-induced mechanical hyperalgesia in mice is mediated by TRPA1 and sst4 receptors. Nitric Oxide 2015. [DOI: 10.1016/j.niox.2015.02.124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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13
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Sághy É, Payrits M, Szőke É, Pozsgai G, Pintér E. TRPA1 receptor-activating effect of hydrogen sulfide and polysulfides in sensory neurons. Nitric Oxide 2015. [DOI: 10.1016/j.niox.2015.02.123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Pintér E, Pozsgai G, Hajna Z, Helyes Z, Szolcsányi J. Neuropeptide receptors as potential drug targets in the treatment of inflammatory conditions. Br J Clin Pharmacol 2015; 77:5-20. [PMID: 23432438 DOI: 10.1111/bcp.12097] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2012] [Accepted: 02/08/2013] [Indexed: 12/19/2022] Open
Abstract
Cross-talk between the nervous, endocrine and immune systems exists via regulator molecules, such as neuropeptides, hormones and cytokines. A number of neuropeptides have been implicated in the genesis of inflammation, such as tachykinins and calcitonin gene-related peptide. Development of their receptor antagonists could be a promising approach to anti-inflammatory pharmacotherapy. Anti-inflammatory neuropeptides, such as vasoactive intestinal peptide, pituitary adenylate cyclase-activating polypeptide, α-melanocyte-stimulating hormone, urocortin, adrenomedullin, somatostatin, cortistatin, ghrelin, galanin and opioid peptides, are also released and act on their own receptors on the neurons as well as on different inflammatory and immune cells. The aim of the present review is to summarize the most prominent data of preclinical animal studies concerning the main pharmacological effects of ligands acting on the neuropeptide receptors. Promising therapeutic impacts of these compounds as potential candidates for the development of novel types of anti-inflammatory drugs are also discussed.
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Affiliation(s)
- Erika Pintér
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, University of Pécs, Szigeti u. 12., H-7624, Pécs, Hungary; János Szentágothai Research Centre, University of Pécs, Ifjúság u. 20., H-7624, Pécs, Hungary
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Pozsgai G, Benkó R, Barthó L, Horváth K, Pintér E. Thermal spring water drinking attenuates dextran-sulfate-sodium-induced colitis in mice. Inflammopharmacology 2015; 23:57-64. [PMID: 25556814 DOI: 10.1007/s10787-014-0227-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2014] [Accepted: 12/22/2014] [Indexed: 01/23/2023]
Abstract
INTRODUCTION The present study investigates the effect of oral consumption of hydrogen sulfide-containing Harkány thermal spring water, as well as sodium hydrogen sulfide (NaHS) solution on experimental colitis. METHODS Colitis was induced by 2% dextran sulfate sodium (DSS) in the drinking water of C57BL/6 mice for 7 days. Some animal groups drank Harkány thermal spring water or water supplemented with 21.68 mg/L NaHS. General signs of colitis, myeloperoxidase (MPO) enzyme activity of colon samples, histological features of colitis and function of the enteric nervous system were assessed. RESULTS Oral administration of Harkány thermal spring water significantly attenuated general signs of colitis, MPO enzyme activity of colon samples and detrimental effect of colitis on the function of the enteric nervous system, but not histological signs of colitis. These findings could be reproduced using NaHS solution with additional significantly diminished histological damage. CONCLUSIONS We conclude that oral treatment with Harkány thermal spring water relieves various aspects of DSS-evoked colitis in mice. This effect is most likely to be mediated by hydrogen sulfide content of the Harkány water. Our data might promote complementary utilization of sulfurous thermal spring water in the therapy of inflammatory bowel disease.
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Affiliation(s)
- Gábor Pozsgai
- Department of Pharmacology and Pharmacotherapy, University of Pécs, Szigeti u. 12, Pécs, 7624, Hungary,
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Nagy L, Filotás D, Boros M, Pozsgai G, Pintér E, Nagy G. Amperometric cell for subcutaneous detection of hydrogen sulfide in anesthetized experimental animals. Physiol Meas 2014; 35:2475-87. [DOI: 10.1088/0967-3334/35/12/2475] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Smillie SJ, King R, Pozsgai G, Liang L, Fernandes E, Marshall N, Howat S, Winter PD, Heads H, Shah A, Siow R, Dessapt-Baradez C, Gnudi L, Brain SD. α CALCITONIN GENE-RELATED PEPTIDE (αCGRP) PLAYS A PROTECTIVE ROLE IN THE ONSET OF ANGIOTENSIN-II INDUCED HYPERTENSION AND VASCULAR INFLAMMATION/REMODELLING. Heart 2012. [DOI: 10.1136/heartjnl-2012-303148a.25] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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18
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Börzsei R, Pozsgai G, Bagoly T, Elekes K, Pintér E, Szolcsányi J, Helyes Z. Inhibitory action of endomorphin-1 on sensory neuropeptide release and neurogenic inflammation in rats and mice. Neuroscience 2008; 152:82-8. [PMID: 18248905 DOI: 10.1016/j.neuroscience.2007.12.005] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2007] [Revised: 11/27/2007] [Accepted: 12/04/2007] [Indexed: 10/22/2022]
Abstract
Substance P (SP) and calcitonin gene-related peptide (CGRP) released from capsaicin-sensitive sensory nerves induce local neurogenic inflammation in the innervated area. The aim of the present study was to investigate the effects of an endogenous opioid peptide, endomorphin-1, on sensory neuropeptide release in vitro and acute neurogenic and non-neurogenic inflammatory reactions in vivo. Electrical field stimulation (EFS; 40 V, 0.1 ms, 10 Hz, 120 s; 1200 impulses) was performed to evoke SP and CGRP release from peptidergic afferents of the isolated rat tracheae which was determined from the incubation medium with radioimmunoassay. Neurogenic inflammation in the skin of the acutely denervated rat hind paw was induced by topical application of 1% mustard oil and detected by Evans Blue leakage. Mustard oil-induced ear swelling of the mouse was determined with a micrometer during 3 h and myeloperoxidase activity as an indicator of granulocyte accumulation was measured with spectrophotometry at 6 h. EFS evoked about a twofold elevation in the release of both pro-inflammatory sensory neuropeptides. Endomorphin-1 (5 nM-2 microM) diminished the release of SP and CGRP in a concentration-dependent manner, the EC50 values were 39.45 nM and 10.84 nM, respectively. The maximal inhibitory action was about 80% in both cases. Administration of endomorphin-1 (1-100 microg/kg i.p.) dose-dependently inhibited mustard oil-evoked neurogenic plasma protein extravasation in the rat skin as determined by microg Evans Blue per g wet tissue. Repeated i.p. injections of the 10 microg/kg dose three times per day for 10 days did not induce desensitization in this model. Neurogenic swelling of the mouse ear was also dose-dependently diminished by 1-100 microg/kg i.p. endomorphin-1, but non-neurogenic neutrophil accumulation was not influenced. These results suggest that endomorphin-1 is able to inhibit the outflow of pro-inflammatory sensory neuropeptides. Based on this mechanism of action it is also able to effectively diminish neurogenic inflammatory responses in vivo.
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Affiliation(s)
- R Börzsei
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, University of Pécs, H-7643, Pécs, Szigeti u. 12, Hungary
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Elekes K, Helyes Z, Kereskai L, Sándor K, Pintér E, Pozsgai G, Tékus V, Bánvölgyi A, Németh J, Szuts T, Kéri G, Szolcsányi J. Inhibitory effects of synthetic somatostatin receptor subtype 4 agonists on acute and chronic airway inflammation and hyperreactivity in the mouse. Eur J Pharmacol 2007; 578:313-22. [PMID: 17961545 DOI: 10.1016/j.ejphar.2007.09.033] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2007] [Revised: 09/18/2007] [Accepted: 09/23/2007] [Indexed: 10/22/2022]
Abstract
Somatostatin released from activated capsaicin-sensitive afferents of the lung inhibits inflammation and related bronchial hyperreactivity presumably via somatostatin 4 receptors (sst(4)). The aim of this study was to examine the effects of TT-232, a heptapeptide sst(4)/sst(1) receptor agonist and J-2156, a high affinity sst(4) receptor-selective peptidomimetic agonist in airway inflammation models. Acute pneumonitis was evoked by intranasal lipopolysaccharide 24 h before measurement. Chronic inflammation was induced by ovalbumin inhalation on days 28, 29 and 30 after i.p. sensitization on days 1 and 14. Semiquantitative histopathological scoring was based on perivascular/peribronchial oedema, neutrophil/macrophage infiltration, goblet cell hyperplasia in the acute model and eosinophil infiltration, mucosal oedema, mucus production and epithelial cell damage in chronic inflammation. Myeloperoxidase activity of the lung was measured spectrophotometrically to quantify granulocyte accumulation and the broncoalveolar lavage fluid was analysed by flow cytometry. Carbachol-induced bronchoconstriction was assessed by unrestrained whole body plethysmography and its calculated indicator, enhanced pause (Penh) was determined. TT-232 and J-2156 induced similar inhibition on granulocyte recruitment and histopathological changes in both models, although macrophage infiltration in LPS-induced inflammation was unaltered by either compounds. Both agonists diminished inflammatory airway hyperresponsiveness. Since their single administration after the development of the inflammatory reactions also inhibited carbachol-induced bronchoconstriction, somatostatin sst(4) receptor activation on bronchial smooth muscle cells is likely to be involved in their anti-hyperreactivity effect. These results suggest that stable, somatostatin sst(4) receptor-selective agonists could be potential candidates for the development of a completely novel group of anti-inflammatory drugs for the treatment of airway inflammation and hyperresponsiveness.
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Affiliation(s)
- Krisztián Elekes
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, University of Pécs, H-7624 Pécs, Szigeti u. 12., Hungary
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Helyes Z, Pozsgai G, Börzsei R, Németh J, Bagoly T, Márk L, Pintér E, Tóth G, Elekes K, Szolcsányi J, Reglodi D. Inhibitory effect of PACAP-38 on acute neurogenic and non-neurogenic inflammatory processes in the rat. Peptides 2007; 28:1847-55. [PMID: 17698245 DOI: 10.1016/j.peptides.2007.07.001] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2007] [Revised: 06/22/2007] [Accepted: 07/02/2007] [Indexed: 11/25/2022]
Abstract
Inhibitory actions of pituitary adenylate cyclase activating polypeptide (PACAP) have been described on cellular/vascular inflammatory components, but there are few data concerning its role in neurogenic inflammation. In this study we measured PACAP-like immunoreactivity with radioimmunoassay in the rat plasma and showed a two-fold elevation in response to systemic stimulation of capsaicin-sensitive sensory nerves by resiniferatoxin, but not after local excitation of cutaneous afferents. Neurogenic plasma extravasation in the plantar skin induced by intraplantar capsaicin or resiniferatoxin, as well as carrageenan-induced paw edema were significantly diminished by intraperitoneal PACAP-38. In summary, these results demonstrate that PACAP is released from activated capsaicin-sensitive afferents into the systemic circulation. It diminishes acute pure neurogenic and mixed-type inflammatory reactions via inhibiting pro-inflammatory mediator release and/or by acting at post-junctional targets on the vascular endothelium.
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Affiliation(s)
- Z Helyes
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, University of Pécs, Hungary
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21
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Helyes Z, Elekes K, Németh J, Pozsgai G, Sándor K, Kereskai L, Börzsei R, Pintér E, Szabó A, Szolcsányi J. Role of transient receptor potential vanilloid 1 receptors in endotoxin-induced airway inflammation in the mouse. Am J Physiol Lung Cell Mol Physiol 2007; 292:L1173-81. [PMID: 17237150 DOI: 10.1152/ajplung.00406.2006] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Airways are densely innervated by capsaicin-sensitive sensory neurons expressing transient receptor potential vanilloid 1 (TRPV1) receptors/ion channels, which play an important regulatory role in inflammatory processes via the release of sensory neuropeptides. The aim of the present study was to investigate the role of TRPV1 receptors in endotoxin-induced airway inflammation and consequent bronchial hyperreactivity with functional, morphological, and biochemical techniques using receptor gene-deficient mice. Inflammation was evoked by intranasal administration of Escherichia coli lipopolysaccharide (60 microl, 167 microg/ml) in TRPV1 knockout (TRPV1(-/-)) mice and their wild-type counterparts (TRPV1(+/+)) 24 h before measurement. Airway reactivity was assessed by unrestrained whole body plethysmography, and its quantitative indicator, enhanced pause (Penh), was calculated after inhalation of the bronchoconstrictor carbachol. Histological examination and spectrophotometric myeloperoxidase measurement was performed from the lung. Somatostatin concentration was measured in the lung and plasma with radioimmunoassay. Bronchial hyperreactivity, histological lesions (perivascular/peribronchial edema, neutrophil/macrophage infiltration, goblet cell hyperplasia), and myeloperoxidase activity were significantly greater in TRPV(-/-) mice. Inflammation markedly elevated lung and plasma somatostatin concentrations in TRPV1(+/+) but not TRPV1(-/-) animals. In TRPV1(-/-) mice, exogenous administration of somatostatin-14 (4 x 100 microg/kg ip) diminished inflammation and hyperreactivity. Furthermore, in wild-type mice, antagonizing somatostatin receptors by cyclo-somatostatin (4 x 250 microg/kg ip) increased these parameters. This study provides the first evidence for a novel counterregulatory mechanism during endotoxin-induced airway inflammation, which is mediated by somatostatin released from sensory nerve terminals in response to activation of TRPV1 receptors of the lung. It reaches the systemic circulation and inhibits inflammation and consequent bronchial hyperreactivity.
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Affiliation(s)
- Zsuzsanna Helyes
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, University of Pécs, Pécs, Hungary.
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22
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Elekes K, Helyes Z, Németh J, Sándor K, Pozsgai G, Kereskai L, Börzsei R, Pintér E, Szabó A, Szolcsányi J. Role of capsaicin-sensitive afferents and sensory neuropeptides in endotoxin-induced airway inflammation and consequent bronchial hyperreactivity in the mouse. ACTA ACUST UNITED AC 2007; 141:44-54. [PMID: 17291600 DOI: 10.1016/j.regpep.2006.12.018] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2006] [Revised: 12/15/2006] [Accepted: 12/16/2006] [Indexed: 01/09/2023]
Abstract
Substance P (SP) and calcitonin gene-related peptide (CGRP) released from capsaicin-sensitive afferents induce neurogenic inflammation via NK(1), NK(2) and CGRP1 receptor activation. This study examines the role of capsaicin-sensitive fibres and sensory neuropeptides in endotoxin-induced airway inflammation and consequent bronchial hyperreactivity with functional, morphological and biochemical techniques in mice. Carbachol-induced bronchoconstriction was measured with whole body plethysmography 24 h after intranasal lipopolysaccharide administration. SP and CGRP were determined with radioimmunoassay, myeloperoxidase activity with spectrophotometry, interleukin-1beta with ELISA and histopathological changes with semiquantitative scoring from lung samples. Treatments with resiniferatoxin for selective destruction of capsaicin-sensitive afferents, NK(1) antagonist SR 140333, NK(2) antagonist SR 48968, their combination, or CGRP1 receptor antagonist CGRP(8-37) were performed. Lipopolysaccharide significantly increased lung SP and CGRP concentrations, which was prevented by resiniferatoxin pretreatment. Resiniferatoxin-desensitization markedly enhanced inflammation, but decreased bronchoconstriction. CGRP(8-37) or combination of SR 140333 and SR 48968 diminished neutrophil accumulation, MPO levels and IL-1beta production, airway hyperresponsiveness was inhibited only by SR 48968. This is the first evidence that capsaicin-sensitive afferents exert a protective role in endotoxin-induced airway inflammation, but contribute to increased bronchoconstriction. Activation of CGRP1 receptors or NK(1)+NK(2) receptors participate in granulocyte accumulation, but NK(2) receptors play predominant role in enhanced airway resistance.
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Affiliation(s)
- Krisztián Elekes
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, University of Pécs, H-7624 Pécs, Szigeti u. 12., Hungary
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23
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Helyes Z, Pintér E, Németh J, Sándor K, Elekes K, Szabó A, Pozsgai G, Keszthelyi D, Kereskai L, Engström M, Wurster S, Szolcsányi J. Effects of the somatostatin receptor subtype 4 selective agonist J-2156 on sensory neuropeptide release and inflammatory reactions in rodents. Br J Pharmacol 2006; 149:405-15. [PMID: 16953190 PMCID: PMC1978437 DOI: 10.1038/sj.bjp.0706876] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND AND PURPOSE Substance P (SP) and calcitonin gene-related peptide (CGRP) released from capsaicin-sensitive sensory nerves induce local neurogenic inflammation; somatostatin exerts systemic anti-inflammatory actions presumably via sst4/sst1 receptors. This study investigates the effects of a high affinity, sst4-selective, synthetic agonist, J-2156, on sensory neuropeptide release in vitro and inflammatory processes in vivo. EXPERIMENTAL APPROACH Electrically-induced SP, CGRP and somatostatin release from isolated rat tracheae was measured with radioimmunoassay. Mustard oil-induced neurogenic inflammation in rat hindpaw skin was determined by Evans blue leakage and in the mouse ear with micrometry. Dextran-, carrageenan- or bradykinin-induced non-neurogenic inflammation was examined with plethysmometry or Evans blue, respectively. Adjuvant-induced chronic arthritis was assessed by plethysmometry and histological scoring. Granulocyte accumulation was determined with myeloperoxidase assay and IL-1beta with ELISA. KEY RESULTS J-2156 (10-2000 nM) diminished electrically-evoked neuropeptide release in a concentration-dependent manner. EC50 for the inhibition of substance P, CGRP and somatostatin release were 11.6 nM, 14.3 nM and 110.7 nM, respectively. J-2156 (1-100 microg kg(-1) i.p.) significantly, but not dose-dependently, inhibited neurogenic and non-neurogenic acute inflammatory processes and adjuvant-induced chronic oedema and arthritic changes. Endotoxin-evoked myeloperoxidase activity and IL-1beta production in the lung, but not IL-1beta- or zymosan-induced leukocyte accumulation in the skin were significantly diminished by J-2156. CONCLUSIONS AND IMPLICATIONS J-2156 acting on sst4 receptors inhibits neuropeptide release, vascular components of acute inflammatory processes, endotoxin-induced granulocyte accumulation and IL-1beta synthesis in the lung and synovial and inflammatory cells in chronic arthritis. Therefore it might be a promising lead for the development of novel anti-inflammatory drugs.
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Affiliation(s)
- Z Helyes
- Department of Pharmacology and Pharmacotherapy, University of Pécs, Pécs, Szigeti u. 12, Hungary.
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Németh J, Reglödi D, Pozsgai G, Szabó A, Elekes K, Pintér E, Szolcsányi J, Helyes Z. Effect of pituitary adenylate cyclase activating polypeptide-38 on sensory neuropeptide release and neurogenic inflammation in rats and mice. Neuroscience 2006; 143:223-30. [PMID: 16938409 DOI: 10.1016/j.neuroscience.2006.07.028] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2006] [Revised: 07/19/2006] [Accepted: 07/19/2006] [Indexed: 10/24/2022]
Abstract
Substance P (SP) and calcitonin gene-related peptide (CGRP), released from capsaicin-sensitive sensory nerves induce local neurogenic inflammation, while somatostatin exerts systemic anti-inflammatory actions. The aim of the present study was to investigate the release of pituitary adenylate cyclase activating polypeptide-38 (PACAP-38) and its effects on sensory neuropeptide release in vitro and acute neurogenic ear swelling in vivo. Capsaicin (10(-6) M) or electrical field stimulation (EFS; 40 V, 0.1 ms, 10 Hz, 120 s; 1200 impulses)-induced release of PACAP-38, SP, CGRP and somatostatin from isolated rat tracheae was measured with radioimmunoassay. Mustard oil-induced neurogenic inflammation in the mouse ear was determined with a micrometer and in the rat hind paw skin by the Evans Blue leakage technique. Capsaicin and EFS evoked 27% and more than twofold elevation of PACAP-38 release respectively, compared with the prestimulated basal values from isolated trachea preparation. Exogenously administered PACAP-38 (20-2000 nM) diminished both capsaicin- and EFS-evoked sensory neuropeptide release in a concentration-dependent manner. The maximal inhibitory effects of PACAP on capsaicin-induced substance P, CGRP and somatostatin release amounted to 75.4%, 73.3% and 90.0%, while EFS-evoked release of these peptides was 80.03%, 87.7% and 67.7%. In case of capsaicin stimulation the EC50 values for substance P, CGRP and somatostatin were 82.9 nM, 60.1 nM and 66.9 nM, respectively. When EFS was performed, these corresponding EC50 data were 92.1 nM, 67.8 nM and 20.9 nM. PACAP-38 (10, 100 and 1000 microg/kg i.p. in 200 microl volume) inhibited neurogenic ear swelling in the mouse. Furthermore, 100 microg/kg i.p. PACAP also significantly diminished mustard oil-evoked plasma protein extravasation in the rat skin. These results suggest that PACAP-38 is released from the stimulated peripheral terminals of capsaicin-sensitive afferents and it is able to inhibit the outflow of sensory neuropeptides. Based on this mechanism of action PACAP is also able to effectively diminish/abolish neurogenic inflammatory response in vivo after systemic administration.
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Affiliation(s)
- J Németh
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, University of Pécs, H-7643, Szigeti u. 12, Pécs, Hungary
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Pozsgai G, Saringer G. The taxonomy and geographical distribution of the cereal leaf beetles (Oulema spp.) of Hungary. Commun Agric Appl Biol Sci 2006; 71:53-6. [PMID: 17612352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
The cereal leaf beetle (Oulema spp.) fauna of Hungary was reviewed taxonomically as well as zoogeographically. The species Oulema duftschmidi was recorded in most areas of the country living in mixed populations with O. melanopus. O. rufocyanea was less common than the other two species and is found mostly in the southern part of the country.
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Affiliation(s)
- G Pozsgai
- University of Veszprem, Georgikon Faculty of Agriculture, Keszthely, Hungary
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26
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Bánvölgyi A, Pálinkás L, Berki T, Clark N, Grant AD, Helyes Z, Pozsgai G, Szolcsányi J, Brain SD, Pintér E. Evidence for a novel protective role of the vanilloid TRPV1 receptor in a cutaneous contact allergic dermatitis model. J Neuroimmunol 2005; 169:86-96. [PMID: 16188326 DOI: 10.1016/j.jneuroim.2005.08.012] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2005] [Accepted: 08/03/2005] [Indexed: 12/11/2022]
Abstract
The purpose of this study was to examine the involvement of the transient receptor potential vanilloid receptor 1 (TRPV1) in inflammatory processes observed in murine allergic contact dermatitis (ACD). Oxazolone-induced ACD evoked a significant ear swelling after 24-72 h. It was augmented in TRPV1 knockout mice at all time points and supported by histological analysis and measure of TNF-alpha. However, tissue swelling and cytokine generation was significantly reduced in both neurokinin 1 receptor and calcitonin gene-related peptide (CGRP) knockout mice. A protective involvement of the TRPV1 receptor was identified of contact dermatitis distinct from mechanisms involving the major pro-inflammatory neuropeptides.
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Affiliation(s)
- Agnes Bánvölgyi
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, University of Pécs, H-7624 Pécs, Szigeti. u. 12, Hungary
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Bánvölgyi A, Pozsgai G, Brain SD, Helyes ZS, Szolcsányi J, Ghosh M, Melegh B, Pintér E. Mustard oil induces a transient receptor potential vanilloid 1 receptor-independent neurogenic inflammation and a non-neurogenic cellular inflammatory component in mice. Neuroscience 2004; 125:449-59. [PMID: 15062987 DOI: 10.1016/j.neuroscience.2004.01.009] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/07/2004] [Indexed: 10/26/2022]
Abstract
A neurogenic component has been suggested to play a pivotal role in a range of inflammatory/immune diseases. Mustard oil (allyl-isothiocyanate) has been used in studies of inflammation to mediate neurogenic vasodilatation and oedema in rodent skin. The aim of the present study was to analyse mustard oil-induced oedema and neutrophil accumulation in the mouse ear focussing on the roles of neurokinin 1 (NK(1)) and vanilloid (TRPV1) receptors using normal (BALB/c, C57BL/6) as well as NK(1) and TRPV1 receptor knockout mice. A single or double treatment of 1% mustard oil on the BALB/c mouse ear induced ear oedema with responses diminished by 6 h. However a 25-30% increase in ear thickness was maintained by the hourly reapplication of mustard oil. Desensitisation of sensory nerves with capsaicin, or the NK(1) receptor antagonist SR140333, inhibited oedema but only in the first 3 h. Neutrophil accumulation in response to mustard oil was inhibited neither by SR140333 nor capsaicin pre-treatment. An activating dose of capsaicin (2.5%) induced a large oedema in C57BL/6 wild-type mice that was minimal in TRPV1 receptor knockout mice. By comparison, mustard oil generated ear swelling was inhibited by SR140333 in wild-type and TRPV1 knockout mice. Repeated administration of mustard oil maintained 35% oedema in TRPV1 knockout animals and the lack of TRPV1 receptors did not alter the leukocyte accumulation. In contrast repeated treatment caused about 20% ear oedema in Sv129+C57BL/6 wild-type mice but the absence of NK(1) receptors significantly decreased the response. Neutrophil accumulation showed similar values in both groups. This study has revealed that mustard oil can act via both neurogenic and non-neurogenic mechanisms to mediate inflammation in the mouse ear. Importantly, the activation of the sensory nerves was still observed in TRPV1 knockout mice indicating that the neurogenic inflammatory component occurs via a TRPV1 receptor independent process.
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Affiliation(s)
- A Bánvölgyi
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, University of Pécs, Szigeti u. 12, H-7624 Pécs, Hungary
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