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https://www.readbyqxmd.com/read/27875791/localization-and-expression-patterns-of-trp-channels-in-submandibular-gland-development
#1
Motoya Fujiseki, Masahito Yamamoto, Sobhan Ubaidus, Takashi Shinomiya, Shinichi Abe, Masakazu Tazaki, Hitoshi Yamamoto
OBJECTIVE: Expression of Transient receptor potential (TRP) channels: TRP canonical (TRPC)1, TRP vanilloid (TRPV)3, TRPV4 and TRP melastatin (TRPM)8 in adult rat salivary gland has recently been reported. The authors investigated expression of these TRP channels in the submandibular gland during early developmental stage in which the cell constitution is different, and discussed the function of TRP in the submandibular gland in early development. DESIGN: Using rat submandibular gland at embryonic days (E)18 and E20 and postnatal days (PN)0 and PN5 and PN28, expression of TRPV3, TRPV4, TRPC1 and TRPM8 was investigated using real-time polymerase chain reaction (RT-PCR) and immunohistochemistry...
November 11, 2016: Archives of Oral Biology
https://www.readbyqxmd.com/read/27864675/drugs-affecting-trp-channels
#2
M A Wortley, M A Birrell, M G Belvisi
Chronic obstructive pulmonary disease (COPD) and asthma are both common respiratory diseases that are associated with airflow reduction/obstruction and pulmonary inflammation. Whilst drug therapies offer adequate symptom control for many mild to moderate asthmatic patients, severe asthmatics and COPD patients symptoms are often not controlled, and in these cases, irreversible structural damage occurs with disease progression over time. Transient receptor potential (TRP) channels, in particular TRPV1, TRPA1, TRPV4 and TRPM8, have been implicated with roles in the regulation of inflammation and autonomic nervous control of the lungs...
November 19, 2016: Handbook of Experimental Pharmacology
https://www.readbyqxmd.com/read/27862339/novel-trpm8-agonist-cooling-compound-against-chronic-itch-results-from-a-randomized-double-blind-controlled-pilot-study-in-dry-skin
#3
S Ständer, M Augustin, D Roggenkamp, C Blome, T Heitkemper, A C Worthmann, G Neufang
BACKGROUND: Patients suffering from chronic pruritus (CP) due to dry skin with are often applying emollients containing menthol. However, topical menthol may be irritating and of weak potency in severe pruritus. Two TRPM8 agonists, (1R,2S,5R)-N-(2-(2-pyridinyl)ethyl)-2-ispropyl-5-methylcyclohexancarboxamide and menthoxypropan-ediol, combined as Cooling Compound (CC) have shown stronger activation of TRPM8 than menthol. OBJECTIVES: Objective of this study was to evaluate the efficacy and safety of CC in alleviating pruritus in patients with dry itchy skin...
November 11, 2016: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/27845197/sustained-morphine-administration-induces-trpm8-dependent-cold-hyperalgesia
#4
Kerui Gong, Luc Jasmin
: It is not uncommon for patients chronically treated with opioids to exhibit opioid induced hyperalgesia (OIH), and this has been widely reported both clinically and experimentally. The molecular substrate for this hyperalgesia is multifaceted, and associated with a complex neural reorganization even in the periphery. For instance, we have recently shown that chronic morphine-induced heat hyperalgesia is associated with an increased expression of GluN2B containing N-methyl-D-aspartate (NMDA) receptors, as well as of the neuronal excitatory amino acid transporter 3/excitatory amino acid carrier 1, in small diameter primary sensory neurons only...
November 11, 2016: Journal of Pain: Official Journal of the American Pain Society
https://www.readbyqxmd.com/read/27835802/transient-receptor-potential-channels-in-neuropathic-pain
#5
REVIEW
Lilian Basso, Christophe Altier
Neuropathic pain caused by disease or dysfunction of the nervous system is one of the most difficult pain conditions to treat. Symptoms include a hypersensitivity to mechanical and thermal stimuli, processed by specialized nociceptors that constitute the first line of defence of the somatosensory system. The detection of these stimuli depends on the TRP ion channel family, which activates upon damaging pressure, extreme temperature, or toxic endogenous and exogenous chemicals. This review will summarize the current knowledge of the contribution of TRP channels, particularly the thermosensitive TRP, including TRPV1, TRPA1 and TRPM8 channels that play a central role in the sensitization of nociceptive transduction...
October 27, 2016: Current Opinion in Pharmacology
https://www.readbyqxmd.com/read/27812120/oxidized-phospholipid-oxpapc-activates-trpa1-and-contributes-to-chronic-inflammatory-pain-in-mice
#6
Boyi Liu, Yan Tai, Ana I Caceres, Satyanarayana Achanta, Shrilatha Balakrishna, Xiaomei Shao, Junfan Fang, Sven-Eric Jordt
Oxidation products of the naturally occurring phospholipid 1-palmitoyl-2-arachidonoyl-sn-glycerol-3-phosphatidylcholine (PAPC), which are known as OxPAPC, accumulate in atherosclerotic lesions and at other sites of inflammation in conditions such as septic inflammation and acute lung injury to exert pro- or anti-inflammatory effects. It is currently unknown whether OxPAPC also contributes to inflammatory pain and peripheral neuronal excitability in these conditions. Here, we observed that OxPAPC dose-dependently and selectively activated human TRPA1 nociceptive ion channels expressed in HEK293 cells in vitro, without any effect on other TRP channels, including TRPV1, TRPV4 and TRPM8...
2016: PloS One
https://www.readbyqxmd.com/read/27792844/hydrogen-peroxide-preferentially-activates-capsaicin-sensitive-high-threshold-afferents-via-trpa1-channels-in-the-guinea-pig-bladder
#7
S Nicholas, S Y Yuan, S J H Brookes, N J Spencer, V P Zagorodnyuk
BACKGROUND AND PURPOSE: There is increasing evidence suggesting that reactive oxygen species (ROS) play a major pathological role in bladder dysfunction induced by bladder inflammation and/or obstruction. The aim of this study was to determine the effect of H2 O2 on different types of bladder afferents and its mechanism of action on sensory neurons in the guinea pig bladder. EXPERIMENTAL APPROACH: "Close-to-target" single unit extracellular recordings were made from fine branches of pelvic nerves entering the guinea pig bladder, in flat sheet preparations, in vitro...
October 28, 2016: British Journal of Pharmacology
https://www.readbyqxmd.com/read/27789940/trpm8-genetic-variations-associated-with-copd-risk-in-the-chinese-han-population
#8
Mingmei Xiong, Jian Wang, Meihua Guo, Qipeng Zhou, Wenju Lu
TRPM8 plays a key role in COPD. The development of pulmonary hypertension (PH) in COPD adversely affects survival and exercise capacity. Thus, the aim of this study was to evaluate the possible association between single nucleotide polymorphisms (SNPs) in TRPM8 and COPD or PH in COPD among the Chinese Han population. A total of 513 COPD patients and 506 controls were enrolled in the study. Six tag SNPs (tSNPs) were genotyped. The relationship between COPD or PH in COPD and the six tSNPs was evaluated using the χ(2) test and genetic model analysis...
2016: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/27765744/ion-channel-mechanisms-of-rat-tail-artery-contraction-relaxation-by-menthol-involving-respectively-trpm8-activation-and-l-type-ca2-channel-inhibition
#9
Donal Melanaphy, Christopher D Johnson, Maxim V Kustov, Conall A Watson, Lyudmyla Borysova, Theodor V Burdyga, Alexander V Zholos
Transient receptor potential melastatin 8 (TRPM8) is the principal cold and menthol receptor channel. Characterized primarily for its cold-sensing role in sensory neurons, it is expressed and functional in several nonneuronal tissues, including vasculature. We previously demonstrated that menthol causes variable mechanical responses (vasoconstriction, vasodilatation, or biphasic reactions) in isolated arteries, depending on vascular tone. Here we aimed to dissect the specific ion channel mechanisms and corresponding Ca(2+) signaling pathways underlying such complex responses to menthol and other TRPM8 ligands in rat tail artery myocytes using patch-clamp electrophysiology, confocal Ca(2+) imaging, and ratiometric Ca(2+) recording...
December 1, 2016: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/27757589/trp-channels-potential-drug-target-for-neuropathic-pain
#10
Lovish Marwaha, Yashika Bansal, Raghunath Singh, Priyanka Saroj, Ranjana Bhandari, Anurag Kuhad
Neuropathic pain is a debilitating disease which affects central as well as peripheral nervous system. Transient receptor potential (TRP) channels are ligand-gated ion channels that detect physical and chemical stimuli and promote painful sensations via nociceptor activation. TRP channels have physiological role in the mechanisms controlling several physiological responses like temperature and mechanical sensations, response to painful stimuli, taste, and pheromones. TRP channel family involves six different TRPs (TRPV1, TRPV2, TRPV3, TRPV4, TRPM8, and TRPA1) which are expressed in pain sensing neurons and primary afferent nociceptors...
October 18, 2016: Inflammopharmacology
https://www.readbyqxmd.com/read/27712653/the-influence-of-cooling-and-trpm8-ion-channel-activation-on-the-level-of-pro-inflammatory-cytokines-in-normotensive-and-hypertensive-rats
#11
Tamara V Kozyreva, Galina M Khramova, Irina P Voronova, Anna A Evtushenko
The role of thermosensitive TRP ion channels in physiological processes in the whole organism is far from being clear. In present work we tried to understand the possible participation of the cold-sensitive ion channel TRPM8 in regulation of the pro-inflammatory cytokine level in blood, and to see if hypertension (widely spread disease) changes this relationship. Experiments were carried out on normotensive Wistar rats and rats with inherited stress-induced arterial hypertension. The effects of deep rapid and slow cooling with decrease in rectal temperature by 3°C, and activation of the skin TRPM8 ion channel by its agonist menthol (application of 1% L-menthol) on the concentration of pro-inflammatory cytokines (IL-6, IL-1β and TNFα) in blood have been studied...
October 2016: Journal of Thermal Biology
https://www.readbyqxmd.com/read/27698211/menthol-decreases-oral-nicotine-aversion-in-c57bl-6-mice-through-a-trpm8-dependent-mechanism
#12
Lu Fan, Shrilatha Balakrishna, Sairam V Jabba, Pamela E Bonner, Seth R Taylor, Marina R Picciotto, Sven-Eric Jordt
BACKGROUND: Nicotine is a major oral irritant in smokeless tobacco products and has an aversive taste. Mentholated smokeless tobacco products are highly popular, suggesting that menthol increases their palatability and may facilitate initiation of product use. While menthol is known to reduce respiratory irritation by tobacco smoke irritants, it is not known whether this activity extends to oral nicotine and its aversive effects. STUDY DESIGN: The two-bottle choice drinking assay was used to characterise aversion and preference in C57BL/6 mice to a range of menthol concentrations (10-200 µg/mL)...
October 3, 2016: Tobacco Control
https://www.readbyqxmd.com/read/27687662/-trpm8-mediates-pc-12-neuronal-cell-apoptosis-induced-by-oxygen-glucose-deprivation-through-camp-pka-ucp4-signaling
#13
Hong-Wei Li, Bin Zhou, Hai-Hong Zhang
OBJECTIVE: To explore the molecular mechanism responsible for apoptosis of PC-12 neuronal cells induced by oxygen-glucose deprivation (OGD). METHODS: PC12 cells were exposed to OGD for 24 h to simulate ischemia-reperfusion injury. Flow cytometry was employed detect the cell apoptosis, and the expresions of TRPM8, UCP4, cAMP and PKA in the exposed cells were detected with RT-PCR and Western blotting. The changes in the expressions of Bax, Bcl-2, cAMP, PKA and UCP4 proteins were detected in the exposed cells in resposne to inhibition of TRPM8 and cAMP-PKA signal or over-expression of UCP4...
August 20, 2016: Nan Fang Yi Ke da Xue Xue Bao, Journal of Southern Medical University
https://www.readbyqxmd.com/read/27634619/trpm8-and-migraine
#14
Greg Dussor, Yu-Qing Cao
Migraine is among the most common diseases on earth and one of the most disabling, the latter due in large part to poor treatment efficacy. Development of new therapeutics is dependent on the identification of mechanisms contributing to migraine and discovery of targets for new drugs. Numerous genome-wide association studies (GWAS) have implicated the transient receptor-potential M8 (TRPM8) channel in migraine. This channel is predominantly expressed on peripheral sensory neurons and is known as the sensor for cold temperature in cutaneous tissue but is also expressed on deep visceral afferents where cold is not likely a stimulus...
October 2016: Headache
https://www.readbyqxmd.com/read/27590914/two-different-avian-cold-sensitive-sensory-neurons-transient-receptor-potential-melastatin-8-trpm8-dependent-and-independent-activation-mechanisms
#15
A Yamamoto, K Takahashi, S Saito, M Tominaga, T Ohta
Sensing the ambient temperature is an important function for survival in animals. Some TRP channels play important roles as detectors of temperature and irritating chemicals. There are functional differences of TRP channels among species. TRPM8 in mammals is activated by cooling compounds and cold temperature, but less information is available on the functional role of TRPM8 in avian species. Here we investigated the pharmacological properties and thermal sensitivities of chicken TRPM8 (cTRPM8) and cold-sensitive mechanisms in avian sensory neurons...
December 2016: Neuropharmacology
https://www.readbyqxmd.com/read/27558883/the-stress-protein-heat-shock-cognate-70-hsc70-inhibits-the-transient-receptor-potential-vanilloid-type-1-trpv1-channel
#16
Mircea Iftinca, Robyn Flynn, Lilian Basso, Helvira Melo, Reem Aboushousha, Lauren Taylor, Christophe Altier
BACKGROUND: Specialized cellular defense mechanisms prevent damage from chemical, biological, and physical hazards. The heat shock proteins have been recognized as key chaperones that maintain cell survival against a variety of exogenous and endogenous stress signals including noxious temperature. However, the role of heat shock proteins in nociception remains poorly understood. We carried out an expression analysis of the constitutively expressed 70 kDa heat-shock cognate protein, a member of the stress-induced HSP70 family in lumbar dorsal root ganglia from a mouse model of Complete Freund's Adjuvant-induced chronic inflammatory pain...
2016: Molecular Pain
https://www.readbyqxmd.com/read/27533035/the-trpm2-ion-channel-is-required-for-sensitivity-to-warmth
#17
Chun-Hsiang Tan, Peter A McNaughton
Thermally activated ion channels are known to detect the entire thermal range from extreme heat (TRPV2), painful heat (TRPV1, TRPM3 and ANO1), non-painful warmth (TRPV3 and TRPV4) and non-painful coolness (TRPM8) through to painful cold (TRPA1). Genetic deletion of each of these ion channels, however, has only modest effects on thermal behaviour in mice, with the exception of TRPM8, the deletion of which has marked effects on the perception of moderate coolness in the range 10-25 °C. The molecular mechanism responsible for detecting non-painful warmth, in particular, is unresolved...
August 25, 2016: Nature
https://www.readbyqxmd.com/read/27498155/pure-%C3%AE-9-tetrahydrocannabivarin-and-a-cannabis-sativa-extract-with-high-content-in-%C3%AE-9-tetrahydrocannabivarin-inhibit-nitrite-production-in-murine-peritoneal-macrophages
#18
Barbara Romano, Ester Pagano, Pierangelo Orlando, Raffaele Capasso, Maria Grazia Cascio, Roger Pertwee, Vincenzo Di Marzo, Angelo A Izzo, Francesca Borrelli
Historical and scientific evidence suggests that Cannabis use has immunomodulatory and anti-inflammatory effects. We have here investigated the effect of the non-psychotropic phytocannabinoid Δ(9)-tetrahydrocannabivarin (THCV) and of a Cannabis sativa extract with high (64.8%) content in THCV (THCV-BDS) on nitric oxide (NO) production, and on cannabinoid and transient receptor potential (TRP) channel expression in lipopolysaccharide (LPS)-stimulated murine peritoneal macrophages. THCV-BDS and THCV exhibited similar affinity in radioligand binding assays for CB1 and CB2 receptors, and inhibited, via CB2 but not CB1 cannabinoid receptors, nitrite production evoked by LPS in peritoneal macrophages...
August 3, 2016: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/27487560/correction-to-tetrahydroisoquinoline-derived-urea-and-2-5-diketopiperazine-derivatives-as-selective-antagonists-of-the-transient-receptor-potential-melastatin-8-trpm8-channel-receptor-and-antiprostate-cancer-agents
#19
Luciano De Petrocellis, Francisco J Arroyo, Pierangelo Orlando, Aniello Schiano Moriello, Rosa Maria Vitale, Pietro Amodeo, Aránzazu Sánchez, Cesáreo Roncero, Giulia Bianchini, M Antonia Martín, Pilar López-Alvarado, J Carlos Menéndez
No abstract text is available yet for this article.
August 25, 2016: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/27455110/the-coding-of-cutaneous-temperature-in-the-spinal-cord
#20
Chen Ran, Mark A Hoon, Xiaoke Chen
The spinal cord is the initial stage that integrates temperature information from peripheral inputs. Here we used molecular genetics and in vivo calcium imaging to investigate the coding of cutaneous temperature in the spinal cord in mice. We found that heating or cooling the skin evoked robust calcium responses in spinal neurons, and their activation threshold temperatures distributed smoothly over the entire range of stimulation temperatures. Once activated, heat-responding neurons encoded the absolute skin temperature without adaptation and received major inputs from transient receptor potential (TRP) channel V1 (TRPV1)-positive dorsal root ganglion (DRG) neurons...
September 2016: Nature Neuroscience
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