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https://www.readbyqxmd.com/read/29138954/identification-of-compounds-from-palicourea-rigida-leaves-with-topical-anti-inflammatory-potential-using-experimental-models
#1
Rafael P Pinheiro, Muiara A Moraes, Bruna C S Santos, Rodrigo L Fabri, Glauciemar Del-Vechio-Vieira, Célia H Yamamoto, Ana Lúcia S M Araújo, Aílson L A Araújo, Orlando V Sousa
Palicourea rigida Kunth is traditionally used for the treatment of skin diseases, kidney pains and ovarian inflammation. Based on these traditional uses, this study evaluated the topical anti-inflammatory activity of the ethanol extract from P. rigida leaves (EEPR) and identified bioactive compounds. Ear edema was induced in Swiss mice by the topical application of Croton oil, arachidonic acid, phenol and capsaicin. Histopathological analysis and myeloperoxidase and N-acetyl-β-D-glucosaminidase activities were determined...
November 14, 2017: Inflammopharmacology
https://www.readbyqxmd.com/read/29135018/chronic-prurigo-of-nodular-type-a-review
#2
Claudia Zeidler, Athanasios Tsianakas, Manuel Pereira, Hartmut Ständer, Gil Yosipovitch, Sonja Ständer
Prurigo nodularis (PN) is a subtype of chronic prurigo presenting single to multiple symmetrically distributed, hyperkeratotic and intensively itching papules and nodules. PN evolves along with chronic pruritus in the context of diverse dermatological, systemic, neurological or psychiatric conditions. Permanent scratching is possibly a major trigger of PN, although its exact pathophysiology remains unclear. Current state-of-the-art therapy for PN consists of topical steroids, capsaicin, calcineurin inhibitors, ultraviolet (UV) therapy, systemic administration of gabapentinoids, μ-opioid receptor antagonists, antidepressants or immunosuppressants...
August 23, 2017: Acta Dermato-venereologica
https://www.readbyqxmd.com/read/29132924/impact-of-capsaicin-an-active-component-of-chili-pepper-on-pathogenic-chlamydial-growth-chlamydia-trachomatis-and-chlamydia-pneumoniae-in-immortal-human-epithelial-hela-cells
#3
Kazuya Yamakawa, Junji Matsuo, Torahiko Okubo, Shinji Nakamura, Hiroyuki Yamaguchi
Chlamydia trachomatis is the leading cause of sexually transmitted infections worldwide. Capsaicin, a component of chili pepper, which can stimulate actin remodeling via capsaicin receptor TRPV1 (transient receptor potential vanilloid 1) and anti-inflammatory effects via PPARγ (peroxisome proliferator-activated receptor-γ) and LXRα (liver X receptor α), is a potential candidate to control chlamydial growth in host cells. We examined whether capsaicin could inhibit C. trachomatis growth in immortal human epithelial HeLa cells...
November 10, 2017: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
https://www.readbyqxmd.com/read/29131694/role-of-neuron-glial-interaction-mediated-by-il-1%C3%AE-in-ectopic-tooth-pain
#4
H Komiya, K Shimizu, N Noma, Y Tsuboi, K Honda, K Kanno, K Ohara, M Shinoda, B Ogiso, K Iwata
Although many reports have demonstrated that ectopic pain develops in the orofacial region following tooth pulp inflammation, which often causes misdiagnosis and inappropriate treatment for patients with pulpitis, the precise mechanism remains unknown. In the present study, we hypothesized that the functional interaction between satellite glial cells and neurons mediated by interleukin 1β (IL-1β) in the trigeminal ganglion (TG) is involved in ectopic orofacial pain associated with tooth pulp inflammation...
November 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/29131139/capsaicin-used-on-skin-influences-ion-transport-pathways-an-in-vitro-study
#5
Iga Hołyńska-Iwan, Inga Dziembowska, Paulina Smyk, Magdalena Lampka, Dorota Olszewska-Słonina
Acute, adverse skin effects to capsaicin can be activated by inhibition of sodium transport not only in nociceptive neurons, but also in keratinocytes. The aim of the current study was to describe and compare immediate (15 s) and prolonged (30 min) effects of capsaicin on epidermal (not neural) sodium transport using a rabbit skin model. Skin fragments (n = 169) were incubated in 4 conditions: undisturbed ion transport (U; n = 48); inhibited sodium transport (INa; n = 34) with amiloride used as sodium transport blocker; long-term irritation by capsaicin with undisturbed ion transport (CAPSA-U; n = 43) and with inhibited sodium transport (CAPSA-INa; n = 35)...
November 8, 2017: Skin Pharmacology and Physiology
https://www.readbyqxmd.com/read/29130663/-capsaicin-alleviate-myocardial-ischemia-reperfusion-injury-through-attenuating-mitochondrial-oxidative-stress
#6
Juan-Xia Zhu, Ling-Heng Kong, Chao-Feng Zhang, Na Sun, Jin-Rui Chang, Yan Xu
OBJECTIVE: To investigate the role of capsaicin (CAP) in myocardial ischemia reperfusion injury and its underlying mechanisms. METHODS: Twentyfour adult male SD rats were randomized into 4 groups,namely the control group,ischemia reperfusion group,ischemia reperfusion with CAP group,and ischemia reperfusion with CAPZ and CAP group. Isolated rat hearts underwent Langendorff perfusion. Left ventricular enddiastolic pressure (LVEDP) andleft ventricular developed pressure (LVDP) was calculated to evaluate myocardial performance at 30 min of reperfusion...
September 2017: Sichuan da Xue Xue Bao. Yi Xue Ban, Journal of Sichuan University. Medical Science Edition
https://www.readbyqxmd.com/read/29130364/fluorescent-labeling-and-2-photon-imaging-of-mouse-tooth-pulp-nociceptors
#7
A Kadala, P Sotelo-Hitschfeld, Z Ahmad, P Tripal, B Schmid, A Mueller, L Bernal, Z Winter, S Brauchi, U Lohbauer, K Messlinger, J K Lennerz, K Zimmermann
Retrograde fluorescent labeling of dental primary afferent neurons (DPANs) has been described in rats through crystalline fluorescent DiI, while in the mouse, this technique was achieved with only Fluoro-Gold, a neurotoxic fluorescent dye with membrane penetration characteristics superior to the carbocyanine dyes. We reevaluated this technique in the rat with the aim to transfer it to the mouse because comprehensive physiologic studies require access to the mouse as a model organism. Using conventional immunohistochemistry, we assessed in rats and mice the speed of axonal dye transport from the application site to the trigeminal ganglion, the numbers of stained DPANs, and the fluorescence intensity via 1) conventional crystalline DiI and 2) a novel DiI formulation with improved penetration properties and staining efficiency...
November 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/29129206/differential-cytotoxicity-and-intracellular-calcium-signalling-following-activation-of-the-calcium-permeable-ion-channels-trpv1-and-trpa1
#8
Thomas Stueber, Mirjam J Eberhardt, Yaki Caspi, Shaya Lev, Alexander Binshtok, Andreas Leffler
Several members of the transient receptor channel (TRP) family can mediate a calcium-dependent cytotoxicity. In sensory neurons, vanilloids like capsaicin induce neurotoxicity by activating TRPV1. The closely related ion channel TRPA1 is also activated by irritants, but it is unclear if and how TRPA1 mediates cell death. In the present study we explored cytotoxicity and intracellular calcium signalling resulting from activation of TRPV1 and TRPA1, either heterologously expressed in HEK 293 cells or in native mouse dorsal root ganglion (DRG) neurons...
December 2017: Cell Calcium
https://www.readbyqxmd.com/read/29128793/phytochemicals-genistein-and-capsaicin-modulate-kv2-1-channel-gating
#9
Iván A Aréchiga-Figueroa, Rita Morán-Zendejas, Mayra Delgado-Ramírez, Aldo A Rodríguez-Menchaca
BACKGROUND: Phytochemicals are a large group of plant-derived compounds that have a broad range of pharmacological effects. Some of these effects are derived from their action on transport proteins, including ion channels. The present study investigates the effects of the phytochemicals genistein and capsaicin on voltage-gated potassium Kv2.1 channels. METHODS: The whole-cell patch clamp technique was used to explore the regulation of Kv2.1 channels expressed in HEK293 cells by genistein and capsaicin...
June 3, 2017: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/29125423/management-of-chronic-neuropathic-pain-with-single-and-compounded-topical-analgesics
#10
Nebojsa Nick Knezevic, Tatiana Tverdohleb, Farid Nikibin, Ivana Knezevic, Kenneth D Candido
The goal of our review was to emphasize important aspects that physicians should take into consideration when prescribing topical analgesics as part of chronic neuropathic pain treatment. We discuss the dermatopharmacokinetics and microstructural components of the skin, differences between topical and transdermal drug delivery, and topical medication effects on peripheral neuropathy and central sensitization. Even though the US FDA approved topical analgesics are 8%-capsaicin and 5%-lidocaine patches for treating postherpetic neuralgia, there are many other studies conducted on the efficacy of topical ketamine cream, clonidine gel, topical gabapentin, topical baclofen and topical phenytoin for peripheral neuropathic pain, either alone or in combination with other formulations...
November 10, 2017: Pain Management
https://www.readbyqxmd.com/read/29123620/the-effects-of-regular-exercise-on-capsaicin-induced-pulpal-pain-and-pain-induced-changes-in-passive-avoidance-learning-and-memory-in-rats
#11
Maryam Raoof, Afshin Shakoori, Razieh Kooshki, Mehdi Abbasnejad, Sara Amanpour
Background: Pulpal pain is one of the most common and severe orofacial pain conditions with considerable adverse effects on physiological processes including learning and memory. Regular exercise is known to be effective on cognitive function as well as pain processing in the central nervous system. Here, the possible effects of regular exercise on pulpal pain response as well as pain-induced changes in learning and memory efficiency in rats were investigated. Methods: Twenty-four male Wistar rats were randomly assigned to the control, capsaicin, exercise, and exercise plus capsaicin groups...
October 2017: Korean Journal of Pain
https://www.readbyqxmd.com/read/29122973/capsaicin-cream-for-treatment-of-cannabinoid-hyperemesis-syndrome-in-adolescents-a-case-series
#12
Jessica Graham, Michael Barberio, George Sam Wang
Cannabinoid hyperemesis syndrome (CHS) is an underrecognized diagnosis among adolescents. In the adult literature, it is characterized as nausea, vomiting, and abdominal pain in patients with chronic marijuana use. CHS is often refractory to the standard treatment of nausea and vomiting. Unconventional antiemetics, such as haloperidol, have been successful in alleviating symptoms; however, even 1 dose of haloperidol can lead to grave adverse effects, such as dystonia, extrapyramidal reactions, and neuroleptic malignant syndrome...
November 9, 2017: Pediatrics
https://www.readbyqxmd.com/read/29120986/acute-capsaicin-supplementation-improves-1500-m-running-time-trial-performance-and-rate-of-perceived-exertion-in-physically-active-adults
#13
Marcelo Conrado de Freitas, Jason M Cholewa, Luis A Gobbo, João Vitor N S de Oliveira, Fabio S Lira, Fabrício E Rossi
The purpose of this study was to investigate the acute effect of capsaicin supplementation on performance, rate of perceived exertion and blood lactate concentrations during short duration running in physically active adults. Ten physically active men (age= 23.5±1.9 yrs, weight= 78.3±12.4 kg, height= 177.9±5.9 cm) completed two randomized, double-blind trials: Capsaicin condition (12 mg) or a placebo condition. Forty five minutes after supplement consumption, the participants performed a 1500 meter running time trial...
November 6, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29118020/viscerosensory-input-drives-angiotensin-ii-type-1a-receptor-expressing-neurons-in-the-solitary-tract-nucleus
#14
David A Carter, Haoyao Guo, Angela A Connelly, Jaspreet K Bassi, Angelina Y Fong, Andrew Mark Allen, Stuart James McDougall
Homeostatic regulation of visceral organ function requires integrated processing of neural and neurohormonal sensory signals. The nucleus of the solitary tract (NTS) is the primary sensory nucleus for cranial visceral sensory afferents. Angiotensin II (Ang II) is known to modulate peripheral visceral reflexes, in part, by activating Ang II type 1A receptors (AT1AR) in the NTS. AT1AR-expressing NTS neurons occur throughout the NTS with a defined sub-nuclear distribution and most of these neurons are depolarized by Ang II...
November 8, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/29117570/oxytocin-modulates-nociception-as-an-agonist-of-pain-sensing-trpv1
#15
Yelena Nersesyan, Lusine Demirkhanyan, Deny Cabezas-Bratesco, Victoria Oakes, Ricardo Kusuda, Tyler Dawson, Xiaohui Sun, Chike Cao, Alejandro Martin Cohen, Bharath Chelluboina, Krishna Kumar Veeravalli, Katharina Zimmermann, Carmen Domene, Sebastian Brauchi, Eleonora Zakharian
Oxytocin is a hormone with various actions. Oxytocin-containing parvocellular neurons project to the brainstem and spinal cord. Oxytocin release from these neurons suppresses nociception of inflammatory pain, the molecular mechanism of which remains unclear. Here, we report that the noxious stimulus receptor TRPV1 is an ionotropic oxytocin receptor. Oxytocin elicits TRPV1 activity in native and heterologous expression systems, regardless of the presence of the classical oxytocin receptor. In TRPV1 knockout mice, DRG neurons exhibit reduced oxytocin sensitivity relative to controls, and oxytocin injections significantly attenuate capsaicin-induced nociception in in vivo experiments...
November 7, 2017: Cell Reports
https://www.readbyqxmd.com/read/29112508/estrogen-modulates-corneal-nociception-and-maintains-corneal-homeostasis-in-rat-eye
#16
Vinod Kumar, Vishma Pratap Sur, Rajdeep Guha, Aditya Konar, Sarbani Hazra
PURPOSE: To evaluate the role of estrogen in corneal nociception, its influence on lacrimal secretion, and development of dry eye. METHODS: Ovariectomy was performed in normal healthy female rats (OVX). Estrogen replacement was performed in a population of these rats (OVX+E). Tests for dry eye and corneal sensitivity were performed and compared with rats in proestrus (PRO) as controls. Gene expression of neuropeptides such as substance P, calcitonin gene receptor-like protein (CGRP), estrogen receptor α, TRPV1, and TRPM8 was evaluated in the cornea and trigeminal ganglion...
November 6, 2017: Cornea
https://www.readbyqxmd.com/read/29111889/the-combined-effects-of-exercise-diet-and-a-multi-ingredient-dietary-supplement-on-body-composition-and-adipokine-changes-in-overweight-adults
#17
Shawn M Arent, Alan J Walker, Joseph K Pellegrino, David J Sanders, Bridget A McFadden, Tim N Ziegenfuss, Hector L Lopez
BACKGROUND: Very few weight and fat loss supplements undergo finished-product research to examine efficacy. The purpose of this study was to determine the effects of an 8-week diet and exercise program on body composition, hip and waist girth, and adipokines and evaluate whether a dietary supplement containing raspberry ketone, capsaicin, caffeine, garlic, and Citrus aurantium enhanced outcomes. METHODS: Overweight men and women completed this randomized, placebo-controlled, double-blind study...
November 7, 2017: Journal of the American College of Nutrition
https://www.readbyqxmd.com/read/29107993/nanoencapsulated-capsaicin-changes-migration-behavior-and-morphology-of-madin-darby-canine-kidney-cell-monolayers
#18
Mathias Kaiser, Luisa Pohl, Steffi Ketelhut, Lena Kastl, Christian Gorzelanny, Martin Götte, Jürgen Schnekenburger, Francisco M Goycoolea, Björn Kemper
We have developed a drug delivery nanosystem based on chitosan and capsaicin. Both substances have a wide range of biological activities. We investigated the nanosystem's influence on migration and morphology of Madin Darby canine kidney (MDCK-C7) epithelial cells in comparison to the capsaicin-free nanoformulation, free capsaicin, and control cells. For minimally-invasive quantification of cell migration, we applied label-free digital holographic microscopy (DHM) and single-cell tracking. Moreover, quantitative DHM phase images were used as novel stain-free assay to quantify the temporal course of global cellular morphology changes in confluent cell layers...
2017: PloS One
https://www.readbyqxmd.com/read/29107209/phkv-a-toxin-isolated-from-the-spider-venom-induces-antinociception-by-inhibition-of-cholinesterase-activating-cholinergic-system
#19
Flavia Karine Rigo, Mateus Fortes Rossato, Gabriela Trevisan, Samira Dal-Toé De Prá, Rafael Porto Ineu, Mariane Bernardo Duarte, Célio José de Castro Junior, Juliano Ferreira, Marcus Vinicius Gomez
BACKGROUND AND AIMS: Cholinergic agents cause antinociception by mimicking the release of acetylcholine (ACh) from spinal cholinergic nerves. PhKv is a peptide isolated from the venom of the armed spider Phoneutria nigriventer. It has an antiarrythmogenic activity that involves the enhanced release of acetylcholine. The aim of this study was to investigate whether PhKv had an antinociceptive action in mice. METHODS: Male albino Swiss mice (25-35g) were used in this study...
October 26, 2017: Scandinavian Journal of Pain
https://www.readbyqxmd.com/read/29102918/non-steroidal-anti-inflammatory-drugs-attenuate-agonist-evoked-activation-of-transient-receptor-potential-channels
#20
M G Tsagareli, I Nozadze, N Tsiklauri, G Gurtskaia
Transient receptor potential (TRP) cation channels are the largest group of sensory detector proteins expressed in the nerve terminals of many receptors including nociceptors, and are activated by temperature and chemicals that elicit hot or cold sensations. Antagonists of these channels are likely promising targets for new analgesic drugs at the peripheral and central levels. Because some non-steroidal anti-inflammatory drugs (NSAIDs) are structural analogs of prostaglandins and NSAIDs attenuate heat nociception and mechanical allodynia in models of inflammatory and neuropathic pain, we investigated whether three widely used NSAIDs (diclofenac, ketorolac, and xefocam) affect thermal and mechanical hyperalgesia following the activation of TRPA1 and TRPV1 channels...
November 2, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
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