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https://www.readbyqxmd.com/read/28732812/extracts-and-compounds-active-on-trp-ion-channels-from-waldheimia-glabra-a-ritual-medicinal-plant-from-himalaya
#1
Annamaria Giorgi, Angela Bassoli, Gigliola Borgonovo, Sara Panseri, Alessandra Manzo, Daniela Pentimalli, Aniello Schiano Moriello, Luciano De Petrocellis
BACKGROUND: Waldheimia glabra (Decne.) Regel is a wild plant from the Himalayan Mountains, commonly known as Smooth Ground Daisy. This plant is traditionally used by local populations in religious rituals (incense) or in traditional herbal medicine to treat skin diseases, headache, joint pain and fever. In literature few data are available on the investigation of this aromatic plant. PURPOSE: The present work aims at deepening knowledge about the chemical composition of W...
August 15, 2017: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/28730837/molecular-basis-of-trpa1-regulation-in-nociceptive-neurons-a-review
#2
A Kádková, V Synytsya, J Krusek, L Zímová, V Vlachová
Transient receptor potential A1 (TRPA1) is an excitatory ion channel that functions as a cellular sensor, detecting a wide range of proalgesic agents such as environmental irritants and endogenous products of inflammation and oxidative stress. Topical application of TRPA1 agonists produces an acute nociceptive response through peripheral release of neuropeptides, purines and other transmitters from activated sensory nerve endings. This, in turn, further regulates TRPA1 activity downstream of G-protein and phospholipase C-coupled signaling cascades...
July 18, 2017: Physiological Research
https://www.readbyqxmd.com/read/28716263/exogenous-acrolein-intensifies-sensory-hypersensitivity-after-spinal-cord-injury-in-rat
#3
Breanne Butler, Glen Acosta, Riyi Shi
Acrolein, an α,β-unsaturated aldehyde associated with oxidative stress, is also a major toxic component of tobacco cigarette smoke, which has been reported in the clinic to coincide with the exacerbation of neuropathic pain after SCI. Previous reports have shown that acrolein involvement in spinal cord injury (SCI) is crucial to the development and persistence of neuropathic pain. Through the activation and upregulation of the transient receptor protein ankyrin-1 (TRPA1) cation channel, acrolein is capable of sensitizing the central nervous system in the acute and chronic stages of SCI...
August 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28713241/cold-temperature-encoding-by-cutaneous-trpa1-and-trpm8-carrying-fibers-in-the-mouse
#4
Zoltan Winter, Philipp Gruschwitz, Stephanie Eger, Filip Touska, Katharina Zimmermann
Previous research identified TRPM8 and TRPA1 cold transducers with separate functions, one being functional in the non-noxious range and the second one being a nociceptive transducer. TRPM8-deficient mice present overt deficits in the detection of environmental cool, but not a lack of cold avoidance and TRPA1-deficient mice show clear deficits in some cold nocifensive assays. The extent of TRPA1's contribution to cold sensing in vivo is still unclear, because mice lacking both TRPM8 and TRPA1 (DKO) were described with unchanged cold avoidance from TRPM8(-/-) based on a two-temperature-choice assay and by c-fos measurement...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28710476/inflammatory-pain-control-by-blocking-oxidized-phospholipid-mediated-trp-channel-activation
#5
Beatrice Oehler, Katrin Kistner, Corinna Martin, Jürgen Schiller, Rafaela Mayer, Milad Mohammadi, Reine-Solange Sauer, Milos R Filipovic, Francisco R Nieto, Jan Kloka, Diana Pflücke, Kerstin Hill, Michael Schaefer, Marzia Malcangio, Peter W Reeh, Alexander Brack, Robert Blum, Heike L Rittner
Phospholipids occurring in cell membranes and lipoproteins are converted into oxidized phospholipids (OxPL) by oxidative stress promoting atherosclerotic plaque formation. Here, OxPL were characterized as novel targets in acute and chronic inflammatory pain. Oxidized 1-palmitoyl-2-arachidonoyl-sn-glycero-3-phosphocholine (OxPAPC) and its derivatives were identified in inflamed tissue by mass spectrometry and binding assays. They elicited calcium influx, hyperalgesia and induced pro-nociceptive peptide release...
July 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28707588/targeting-the-prokineticin-system-to-control-chronic-pain-and-inflammation
#6
Lucia Negri, Daniela Maftei
Prokineticin1 and prokineticin2 belong to a new family of chemokines identified in several species including mammals and characterized by the presence of five disulfide bridges. These proteins signal through two G-coupled receptors (prokineticin-receptor1 and prokineticin-receptor2) widely expressed in all tissues and involved in a large spectrum of biological activities, including angiogenesis, hematopoiesis, immune processes, inflammation and nociceptive transmission. Prokineticin2 is overexpressed in inflamed tissues and has a crucial role in neutrophil dependent inflammation and hypernociception...
July 13, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28698251/trpa1-mechanoreceptors-mediate-the-il-6-response-to-a-single-pd-dwell-in-the-rat
#7
Daniel Nilsson, Eva Jennische, Nicola Cavallini, Magnus Braide
BACKGROUND: The development of modern, biocompatible peritoneal dialysis (PD) fluids has not entirely eliminated the local pro-inflammatory effects of PD fluid administration. The present study was performed in order to establish the importance of known signaling pathways connected to mechano-, osmo- and chemo-sensors of the transient receptor potential (TRP) family for the acute inflammatory response to PD. METHODS: Rats were exposed to a single 4-hour dwell of lactate-buffered, 2...
July 11, 2017: Peritoneal Dialysis International: Journal of the International Society for Peritoneal Dialysis
https://www.readbyqxmd.com/read/28683776/trpa1-channels-promote-astrocytic-ca-2-hyperactivity-and-synaptic-dysfunction-mediated-by-oligomeric-forms-of-amyloid-%C3%AE-peptide
#8
Anthony Bosson, Adrien Paumier, Sylvie Boisseau, Muriel Jacquier-Sarlin, Alain Buisson, Mireille Albrieux
BACKGROUND: Excessive synaptic loss is thought to be one of the earliest events in Alzheimer's disease (AD). However, the key mechanisms that maintain plasticity of synapses during adulthood or initiate synapse dysfunction in AD remain unknown. Recent studies suggest that astrocytes contribute to functional changes observed during synaptic plasticity and play a major role in synaptic dysfunction but astrocytes behavior and involvement in early phases of AD remained largely undefined. METHODS: We measure astrocytic calcium activity in mouse CA1 hippocampus stratum radiatum in both the global astrocytic population and at a single cell level, focusing in the highly compartmentalized astrocytic arbor...
July 6, 2017: Molecular Neurodegeneration
https://www.readbyqxmd.com/read/28680930/evolutionary-tuning-of-trpa1-and-trpv1-thermal-and-chemical-sensitivity-in-vertebrates
#9
REVIEW
Shigeru Saito, Makoto Tominaga
Thermal perception is an essential sensory system for survival since temperature fluctuations affect various biologic processes. Therefore, evolutionary changes in thermosensory systems may have played important roles in adaptation processes. Comparative analyses of sensory receptors among different species can provide us with important clues to understand the molecular basis for adaptation. Several ion channels belonging to the transient receptor potential (TRP) superfamily serve as thermal sensors in a wide variety of animal species...
2017: Temperature: Multidisciplinary Biomedical Journal
https://www.readbyqxmd.com/read/28674258/roles-of-transient-receptor-potential-ankyrin-1-in-oxaliplatin-induced-peripheral-neuropathy
#10
Takayuki Nakagawa, Shuji Kaneko
Chemotherapy-induced peripheral neuropathy (CIPN), characterized by symptoms of paresthesia, dysesthesia, numbness, and pain, is a common adverse effect of several chemotherapeutic agents, including platinum-based agents, taxanes, and vinca alkaloids. However, no effective prevention or treatment strategies exist for CIPN because the mechanisms underpinning this neuropathy are poorly understood. Recent accumulating evidence suggests that some transient receptor potential (TRP) channels functioning as nociceptors in primary sensory neurons are responsible for CIPN...
2017: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/28671709/transient-receptor-potential-a1-trpa1-agonists-inhibit-contractions-of-the-isolated-human-ureter
#11
Philipp Weinhold, Martin Hennenberg, Frank Strittmatter, Christian G Stief, Christian Gratzke, Petter Hedlund
AIMS: Mechanoafferent and peristaltic mechanisms of the human ureter involve transient receptor potential V1 (TRPV1)- and purinoceptor-mediated functions. Hydrogen sulphide, an endogenous TRPA1 ligand, is linked to inhibitory neurotransmission of the pig ureter. No information is available on TRPA1 activity in the human ureter. We therefore examined the distribution and function of TRPA1 in the human ureter. METHODS: Expression of TRPA1 in human ureter tissue was studied by Western blot and immunofluorescence...
July 3, 2017: Neurourology and Urodynamics
https://www.readbyqxmd.com/read/28669932/cough-and-airway-disease-the-role-of-ion-channels
#12
REVIEW
Sara J Bonvini, Maria G Belvisi
Cough is the most common reason for patients to visit a primary care physician, yet it remains an unmet medical need. It can be idiopathic in nature but can also be a troublesome symptom across chronic lung diseases such as asthma, COPD and idiopathic pulmonary fibrosis (IPF). Chronic cough affects up to 12% of the population and yet there are no safe and effective therapies. The cough reflex is regulated by vagal, sensory afferent nerves which innervate the airway. The Transient Receptor Potential (TRP) family of ion channels are expressed on sensory nerve terminals, and when activated can evoke cough...
June 29, 2017: Pulmonary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28658621/nociceptors-boost-the-resolution-of-fungal-osteoinflammation-via-the-trp-channel-cgrp-jdp2-axis
#13
Kenta Maruyama, Yasunori Takayama, Takeshi Kondo, Ken-Ichi Ishibashi, Bikash Ranjan Sahoo, Hisashi Kanemaru, Yutaro Kumagai, Mikaël M Martino, Hiroki Tanaka, Naohito Ohno, Yoichiro Iwakura, Naoki Takemura, Makoto Tominaga, Shizuo Akira
Candida albicans can enter skeletal tissue through a skin wound in an immunocompromised host or by contamination during orthopedic surgery. Such Candida osteomyelitis is accompanied by severe pain and bone destruction. It is established that nociceptor innervation occurs in skin and bone, but the mechanisms of nociceptive modulation in fungal inflammation remain unclear. In this study, we show that C. albicans stimulates Nav1.8-positive nociceptors via the β-glucan receptor Dectin-1 to induce calcitonin gene-related peptide (CGRP)...
June 27, 2017: Cell Reports
https://www.readbyqxmd.com/read/28657737/structure-pungency-relationships-and-trp-channel-activation-of-drimane-sesquiterpenes-in-tasmanian-pepper-tasmannia-lanceolata
#14
Klaus Mathie, Johanna Lainer, Stefan Spreng, Corinna Dawid, David A Andersson, Stuart Bevan, Thomas Hofmann
Sensory-guided fractionation of extracts of Tasmanian pepper berries revealed 20 drimane sesquiterpens, among which polygodial, warburganal, and 1β-acetoxy-9-deoxy-isomuzigadial exhibited the lowest pungency threshold concentrations on the tongue surface (0.6-2.8 nmol/cm(2)) and elicited a dose-dependent calcium influx into mTRPA1 expressing CHO cells with the lowest EC50 values (4.5 ± 1.0 to 16.7 ± 7.5 μmol/L) and a good correlation to oral pungency thresholds (R(2) = 0.986, linear regression). Calcium imaging assays demonstrated these chemosensates to induce a calcium influx into cultured trigeminal neurons prepared from wildtype (TRPA1(+/+)) mice, whereas no calcium influx was observed in neurons from TRPA1 knockout mice (TRPA1(-/-)), thus confirming the α,β-unsaturated 1,4-dialdehyde structure to be the required structural motif for a low oral puncency thresholds and activation of the Transient Receptor Potential Channel A1 (TRPA1)...
July 7, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28656709/zingiberis-siccatum-rhizoma-the-active-component-of-the-kampo-formula-daikenchuto-induces-anti-inflammatory-actions-through-%C3%AE-7-nicotinic-acetylcholine-receptor-activation
#15
M Endo, M Hori, T Mihara, H Ozaki, T Oikawa, H Odaguchi, T Hanawa
BACKGROUND: We previously reported that Daikenchuto (DKT), a gastrointestinal prokinetic Japanese herbal (Kampo) medicine used for the treatment of postoperative ileus (POI), has characteristic potent anti-inflammatory activity. This effect may be partly mediated by the activation of α7 nicotinic acetylcholine receptor (nAChR). In this study, we identified the specific herbs in DKT that induce anti-inflammatory action. METHODS: The herbal components of DKT were individually administered orally to each mouse four times before and after intestinal manipulation (IM) was carried out on the distal ileum...
June 28, 2017: Neurogastroenterology and Motility: the Official Journal of the European Gastrointestinal Motility Society
https://www.readbyqxmd.com/read/28656459/involvement-of-thermosensitive-trp-channels-in-energy-metabolism
#16
REVIEW
Kunitoshi Uchida, Katsuya Dezaki, Takeshi Yoneshiro, Tatsuo Watanabe, Jun Yamazaki, Masayuki Saito, Toshihiko Yada, Makoto Tominaga, Yusaku Iwasaki
To date, 11 thermosensitive transient receptor potential (thermo-TRP) channels have been identified. Recent studies have characterized the mechanism of thermosensing by thermo-TRPs and the physiological role of thermo-TRPs in energy metabolism. In this review, we highlight the role of various thermo-TRPs in energy metabolism and hormone secretion. In the pancreas, TRPM2 and other TRPs regulate insulin secretion. TRPV2 expressed in brown adipocytes contributes to differentiation and/or thermogenesis. Sensory nerves that express TRPV1 promote increased energy expenditure by activating sympathetic nerves and adrenaline secretion...
September 2017: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/28651550/a-novel-trpm8-agonist-relieves-dry-eye-discomfort
#17
Jee Myung Yang, Fengxian Li, Qin Liu, Marco Rüedi, Edward Tak Wei, Michael Lentsman, Hyo Seok Lee, Won Choi, Seong Jin Kim, Kyung Chul Yoon
BACKGROUND: Physical cooling of the eye surface relieves ocular discomfort, but translating this event to drug treatment of dry eye discomfort not been studied. Here, we synthesized a water-soluble TRPM8 receptor agonist called cryosim-3 (C3, 1-diisopropylphosphorylnonane) which selectively activates TRPM8 (linked to cooling) but not TRPV1 or TRPA1 (linked to nociception) and tested C3 in subjects with mild forms of dry eye disease. METHODS: A set of 1-dialkylphosphoryalkanes were tested for activation of TRPM8, TRPV1 and TRPA1 receptors in transfected cells...
June 26, 2017: BMC Ophthalmology
https://www.readbyqxmd.com/read/28649203/trps-in-pain-sensation
#18
REVIEW
Isaac Jardín, José J López, Raquel Diez, José Sánchez-Collado, Carlos Cantonero, Letizia Albarrán, Geoffrey E Woodard, Pedro C Redondo, Ginés M Salido, Tarik Smani, Juan A Rosado
According to the International Association for the Study of Pain (IASP) pain is characterized as an "unpleasant sensory and emotional experience associated with actual or potential tissue damage". The TRP super-family, compressing up to 28 isoforms in mammals, mediates a myriad of physiological and pathophysiological processes, pain among them. TRP channel might be constituted by similar or different TRP subunits, which will result in the formation of homomeric or heteromeric channels with distinct properties and functions...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28647127/infrared-light-detection-by-the-haller-s-organ-of-adult-american-dog-ticks-dermacentor-variabilis-ixodida-ixodidae
#19
Robert D Mitchell, Jiwei Zhu, Ann L Carr, Anirudh Dhammi, Grayson Cave, Daniel E Sonenshine, R Michael Roe
The Haller's organ (HO), unique to ticks and mites, is found only on the first tarsus of the front pair of legs. The organ has an unusual morphology consisting of an anterior pit (AP) with protruding sensilla and a posterior capsule (Cp). The current thinking is that the HO's main function is chemosensation analogous to the insect antennae, but the functionality of its atypical structure (exclusive to the Acari) is unexplained. We provide the first evidence that the HO allows the American dog tick, Dermacentor variabilis, to respond to infrared (IR) light...
August 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28644897/trpa1-and-trpv1-contribute-to-propofol-mediated-antagonism-of-u46619-induced-constriction-in-murine-coronary-arteries
#20
Pritam Sinharoy, Ian N Bratz, Sayantani Sinha, Loral E Showalter, Spencer R Andrei, Derek S Damron
BACKGROUND: Transient receptor potential (TRP) ion channels have emerged as key components contributing to vasoreactivity. Propofol, an anesthetic is associated with adverse side effects including hypotension and acute pain upon infusion. Our objective was to determine the extent to which TRPA1 and/or TRPV1 ion channels are involved in mediating propofol-induced vasorelaxation of mouse coronary arterioles in vitro and elucidate the potential cellular signal transduction pathway by which this occurs...
2017: PloS One
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