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https://www.readbyqxmd.com/read/27906951/changes-in-neuroglial-activity-in-multiple-spinal-segments-after-caudal-epidural-pulsed-radiofrequency-in-a-rat-model-of-lumbar-disc-herniation
#1
Hee Kyung Cho, Jae Hoon Kang, So-Yeon Kim, Mi-Jung Choi, Se Jin Hwang, Yun-Woo Cho, Sang-Ho Ahn
BACKGROUND: Herniated lumbar discs can induce sciatica by mechanical compression and/or chemical irritation. It was recently reported that neuroglial cellular activity after pulsed radiofrequency (PRF) application to a single dorsal root ganglion (DRG) attenuated neuroglial activity at the corresponding spinal dorsal horn. Recently, caudal epidural PRF has been used to manage neuropathic pain, but evidence of molecular changes after the administration of caudal epidural PRF to attenuate neuropathic pain is lacking, and it has not been determined whether caudal epidural PRF affects neuroglial activity at different spinal levels...
November 2016: Pain Physician
https://www.readbyqxmd.com/read/27900462/effects-of-a-trpv1-agonist-capsaicin-on-respiratory-rhythm-generation-in-brainstem-spinal-cord-preparation-from-newborn-rats
#2
Mariho Tani, Sayumi Kotani, Chikara Hayakawa, Shih-Tien Lin, Saki Irie, Keiko Ikeda, Kiyoshi Kawakami, Hiroshi Onimaru
The heat-sensitive transient receptor potential vanilloid 1 (TRPV1) channels are expressed in the peripheral and central nervous systems. However, there is no report on how the activation of TRPV1 causes the modulation of neuronal activity in the medullary respiratory center. We examined effects of capsaicin, a specific agonist of TRPV1 channels, on respiratory rhythm generation in brainstem-spinal cord preparation from newborn rats. Capsaicin induced a biphasic response in the respiratory rhythm (a transient decrease followed by an increase in the C4 rate)...
November 29, 2016: Pflügers Archiv: European Journal of Physiology
https://www.readbyqxmd.com/read/27899046/chili-pepper-as-a-body-weight-loss-food
#3
Sharon Varghese, Peter Kubatka, Luis Rodrigo, Katarina Gazdikova, Martin Caprnda, Julia Fedotova, Anthony Zulli, Peter Kruzliak, Dietrich Büsselberg
Chili has culinary as well as medical importance. Studies in humans, using a wide range of doses of chili intake (varying from a single meal to a continuous uptake for up to 12 weeks), concluded that it facilitates weight loss. In regard to this, the main targets of chili are fat metabolism, energy expenditure, and thermogenesis. To induce weight loss, the active substance of chili, capsaicin, activates Transient Receptor Potential Cation Channel sub-family V member 1 (TRPV1) channels) receptors causing an increase in intracellular calcium levels and triggering the sympathetic nervous system...
November 29, 2016: International Journal of Food Sciences and Nutrition
https://www.readbyqxmd.com/read/27896621/distinct-roles-of-asic3-and-trpv1-receptors-in-electroacupuncture-induced-segmental-and-systemic-analgesia
#4
Juanjuan Xin, Yangshuai Su, Zhaokun Yang, Wei He, Hong Shi, Xiaoyu Wang, Ling Hu, Xiaochun Yu, Xianghong Jing, Bing Zhu
Previous studies have demonstrated the effects of different afferent fibers on electroacupuncture (EA)-induced analgesia. However, contributions of functional receptors expressed on afferent fibers to the EA analgesia remain unclear. This study investigates the roles of acid-sensing ion channel 3 (ASIC3) and transient receptor potential vanilloid 1 (TRPV1) receptors in EA-induced segmental and systemic analgesia. Effects of EA at acupoint ST36 with different intensities on the C-fiber reflex and mechanical and thermal pain thresholds were measured among the ASIC3(-/-), TRPV1(-/-), and C57BL/6 mice...
November 28, 2016: Frontiers of Medicine
https://www.readbyqxmd.com/read/27893109/safety-and-efficacy-clinical-trials-for-syl1001-a-novel-short-interfering-rna-for-the-treatment-of-dry-eye-disease
#5
José Manuel Benitez-Del-Castillo, Javier Moreno-Montañés, Ignacio Jiménez-Alfaro, Francisco José Muñoz-Negrete, Krista Turman, Kadi Palumaa, Belén Sádaba, María Victoria González, Verónica Ruz, Beatriz Vargas, Covadonga Pañeda, Tamara Martínez, Anne-Marie Bleau, Ana Isabel Jimenez
Purpose: To evaluate the efficacy and safety of SYL1001, a short interfering (si) RNA targeting the transient receptor potential cation channel subfamily V member 1 (TRPV1), for the treatment of dry eye disease (DED). Methods: This study combines a phase I and two phase II clinical trials to test different doses of SYL1001 in a total of 156 healthy subjects and patients with DED. After 10 days of treatment, the primary efficacy endpoints were the effect on (1) the scoring in the Visual Analogue Scale (VAS) and Ocular Surface Disease Index (OSDI) questionnaires, and (2) ocular tolerance evaluated by corneal fluorescein staining and conjunctival hyperemia...
November 1, 2016: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/27891582/versatile-roles-of-intracellularly-located-trpv1-channel
#6
REVIEW
Rui Zhao, Suk Ying Tsang
The ubiquitous expression in many organs throughout the body and the ability to respond to a wide variety of physical and chemical stimuli have brought transient receptor potential (TRP) channels to the vanguards of our sensory systems. TRP vanilloid-1 (TRPV1) is the founding member of the TRPV subfamily. TRPV1 can be activated by noxious heat, protons and vanilloids. Previous studies have shown that TRPV1 is located on the plasma membrane, serving to non-selectively permeate calcium ion from the extracellular region to the cytoplasm...
November 27, 2016: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/27890711/the-endogenous-lipid-n-arachidonoyl-glycine-is-hypotensive-and-nitric-oxide-cgmp-dependent-vasorelaxant
#7
Yousuf M Al Suleimani, Ahmed S Al Mahruqi
N-arachidonoyl glycine (NAGLY), is the endogenous lipid that activates the G protein-couple receptor 18 (GPR18) with vasodilatory activity in resistance arteries. This study investigates its hemodynamic effects and mechanisms of vasorelaxation. Hemodynamic effects of NAGLY in rats were assessed using a Biopac system and its vascular responses were assessed using a wire myograph. NAGLY (1 mg/kg) decreased blood pressure by 69.4 ± 5.5% and reduced renal blood flow by 88 ± 12% and the effects were not sensitive to inhibition by O-1918 (3 mg/kg)...
November 24, 2016: European Journal of Pharmacology
https://www.readbyqxmd.com/read/27885768/gram-scale-synthesis-of-chiral-cyclopropane-containing-drugs-and-drug-precursors-with-engineered-myoglobin-catalysts-featuring-complementary-stereoselectivity
#8
Priyanka Bajaj, Gopeekrishnan Sreenilayam, Vikas Tyagi, Rudi Fasan
Engineered hemoproteins have recently emerged as promising systems for promoting asymmetric cyclopropanations, but variants featuring predictable, complementary stereoselectivity in these reactions have remained elusive. In this study, a rationally driven strategy was implemented and applied to engineer myoglobin variants capable of providing access to 1-carboxy-2-aryl-cyclopropanes with high trans-(1R,2R) selectivity and catalytic activity. The stereoselectivity of these cyclopropanation biocatalysts complements that of trans-(1S,2S)-selective variants developed here and previously...
November 25, 2016: Angewandte Chemie
https://www.readbyqxmd.com/read/27883196/grifolin-derivatives-from-albatrellus-ovinus-as-trpv1-receptor-blockers-for-cosmetic-applications
#9
Stefan Hettwer, Stefan Bänziger, Brigit Suter, Barbara Obermayer
OBJECTIVE: Blocking the TRPV1 receptor is an interesting approach for the treatment of sensitive skin. Here we investigated the potential of grifolin derivatives from Albatrellus ovinus to act as TRPV1 receptor blockers and their potential to serve as cosmetic active ingredients. METHODS: Binding characteristics of grifolin derivatives from Albatrellus ovinus were determined in competitive and functional in vitro assays to achieve IC50 values. The TRPV1 receptor was activated in vivo with capsaicin and noxious heat to investigate skin reddening, microcirculation, skin sensations and heat pain thresholds...
November 24, 2016: International Journal of Cosmetic Science
https://www.readbyqxmd.com/read/27878303/neuroprotective-effects-of-vitexin-against-isoflurane-induced-neurotoxicity-by-targeting-the-trpv1-and-nr2b-signaling-pathways
#10
Linlin Chen, Bin Zhang, Shiqiang Shan, Xin Zhao
Vitexin is a bioactive compound extracted from hawthorn leaves, which reduces blood pressure and has anti‑inflammatory and potential anticancer effects. However, the mechanisms underlying the protective effects of vitexin against isoflurane‑induced neurotoxicity remain elusive. Therefore, the aim of the present study was to investigate these mechanisms further. Sprague Dawley rats received 1.4% isoflurane in a 100% oxygen environment for 2 h. Human PC12 pheochromocytoma neurosecretory cells were exposed to 2% isoflurane for 12 h before they were treated with 1, 10 or 100 µM vitexin for a further 24 h...
November 16, 2016: Molecular Medicine Reports
https://www.readbyqxmd.com/read/27872485/the-neuroprotective-action-of-dexmedetomidine-on-apoptosis-calcium-entry-and-oxidative-stress-in-cerebral-ischemia-induced-rats-contribution-of-trpm2-and-trpv1-channels
#11
Hatice Akpınar, Mustafa Nazıroğlu, İshak Suat Övey, Bilal Çiğ, Orhan Akpınar
Dexmedetomidine (DEX) may act as an antioxidant through regulation of TRPM2 and TRPV1 channel activations in the neurons by reducing cerebral ischemia-induced oxidative stress and apoptosis. The neuroprotective roles of DEX were tested on cerebral ischemia (ISC) in the cultures of rat primary hippocampal and DRG neurons. Fifty-six rats were divided into five groups. A placebo was given to control, sham control, and ISC groups, respectively. In the third group, ISC was induced. The DEX and ISC+DEX groups received intraperitoneal DEX (40 μg/kg) 3, 24, and 48 hours after ISC induction...
November 22, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27864675/drugs-affecting-trp-channels
#12
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/27864110/antinociceptive-activity-and-mechanism-of-action-of-hydroalcoholic-extract-and-dichloromethane-fraction-of-amphilophium-crucigerum-seeds-in-mice
#13
Samira Dal Toé De Prá, Paula Ronsani Ferro, Alessandra Marcon Milioli, Flávia Karine Rigo, Orlando Justo Chipindo, Camila Camponogara, Rosana Casoti, Melânia Palermo Manfron, Sara Marchesan de Oliveira, Juliano Ferreira, Gabriela Trevisan
ETHNOPHARMACOLOGICAL RELEVANCE: The medicinal plant generally known as monkey's comb (Amphilophium crucigerum) has been popularly described for the treatment of neuropathic and inflammatory pain, specially seeds preparations. AIM OF THE STUDY: The goal of the present study was to evaluate the antinociceptive effect of the crude extract (Crd) and dichloromethane fraction (Dcm) of A. crucigerum seeds, and investigate the involvement of transient receptor potential vanilloid 1 (TRPV1) receptor in this effect...
November 15, 2016: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/27864077/trpv1-participates-in-the-activation-of-clock-molecular-machinery-in-the-brown-adipose-tissue-in-response-to-light-dark-cycle
#14
Maria Nathalia Moraes, Nathana Mezzalira, Leonardo Vinicius Monteiro de Assis, Michael Menaker, Ali Guler, Ana Maria L Castrucci
Transient receptor potential (TRPs) channels are involved in thermogenesis, and temperature and energy balance control. Mice lacking TrpV1 become more obese and develop insulin resistance when fed with high fat diet; however, a relationship between metabolic disorders, TRP channels, and clock genes is still unknown. Based on this, we hypothesized that TRPV1 channels would be involved in the synchronization of clock genes in the peripheral tissues. To address this question, we used wild type (WT) and TrpV1 knockout (KO) mice kept in constant darkness (DD) or in light-dark cycle (LD)...
November 15, 2016: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/27863349/trpv1-channels-in-cardiovascular-system-a-double-edged-sword
#15
REVIEW
Puneet Kaur Randhawa, Amteshwar Singh Jaggi
Apart from modulating nociception, there is vital role of TRPV1 channels in modulating atherosclerosis, congestive heart failure, systemic hypertension, pulmonary hypertension, hemorrhagic shock and vascular remodeling. TRPV1 channel activation has shielding effect against the development of atherosclerosis and systemic hypertension. TRPV1 channel activation alleviates the formation of atherosclerotic lesions via increasing the expression of cholesterol efflux regulatory protein, UCP 2 and enhancing autophagy...
November 9, 2016: International Journal of Cardiology
https://www.readbyqxmd.com/read/27852962/anatomy-and-immunochemical-characterization-of-the-non-arterial-peptidergic-diffuse-dural-innervation-of-the-rat-and-rhesus-monkey-implications-for-functional-regulation-and-treatment-in-migraine
#16
Frank L Rice, Jennifer Y Xie, Phillip J Albrecht, Emily Acker, Justin Bourgeois, Edita Navratilova, David W Dodick, Frank Porreca
OBJECTIVE: The interplay between neuronal innervation and other cell types underlies the physiological functions of the dura mater and contributes to pathophysiological conditions such as migraine. We characterized the extensive, but understudied, non-arterial diffuse dural innervation (DDI) of the rat and Rhesus monkey. METHODS: We used a comprehensive integrated multi-molecular immunofluorescence labeling strategy to extensively profile the rat DDI and to a lesser extent that of the Rhesus monkey...
November 16, 2016: Cephalalgia: An International Journal of Headache
https://www.readbyqxmd.com/read/27852772/functional-synaptic-integration-of-forebrain-gabaergic-precursors-into-the-adult-spinal-cord
#17
Alex Etlin, Joao M Bráz, Julia A Kuhn, Xidao Wang, Katherine A Hamel, Ida J Llewellyn-Smith, Allan I Basbaum
: Spinal cord transplants of embryonic cortical GABAergic progenitor cells derived from the medial ganglionic eminence (MGE) can reverse mechanical hypersensitivity in the mouse models of peripheral nerve injury- and paclitaxel-induced neuropathic pain. Here, we used electrophysiology, immunohistochemistry, and electron microscopy to examine the extent to which MGE cells integrate into host circuitry and recapitulate endogenous inhibitory circuits. Whether the transplants were performed before or after nerve injury, the MGE cells developed into mature neurons and exhibited firing patterns characteristic of subpopulations of cortical and spinal cord inhibitory interneurons...
November 16, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27852067/trpv1-in-pain-control-from-the-brain
#18
EDITORIAL
Daniel Martins, Marta Silva, Isaura Tavares
No abstract text is available yet for this article.
November 11, 2016: Oncotarget
https://www.readbyqxmd.com/read/27849700/20-n-arachidonoyl-dopamine-promotes-systemic-inflammatory-resolution-via-nonhematopoietic-trpv1
#19
Samira Lawton, Kevin Wilhelmsen, Fengyun Xu, Alphonso Tran, Erika Wong, Judith Hellman
No abstract text is available yet for this article.
December 2016: Critical Care Medicine
https://www.readbyqxmd.com/read/27842583/effect-of-sqw-on-the-bladder-function-of-mice-lacking-trpv1
#20
Huanling Lai, QiTao Yan, Hongying Cao, Pengyu Chen, Yifei Xu, Weiwen Jiang, Qinghe Wu, Ping Huang, Bo Tan
BACKGROUND: Suo Quan Wan (SQW) is an effective traditional Chinese prescription on treated lower urinary tract symptoms (LUTS), and has been proved have modulation effect on the expression of transient receptor potential vanilloid 1 (TRPV1) in accordance with the recovery of bladder function of overactive bladder rat. This study further investigated the mechanism of SQW modulated TRPV1 signaling and bladder function using TRPV1 knockout (KO) mice. METHODS: Study was conducted using wild type and TRPV1 KO mice...
November 15, 2016: BMC Complementary and Alternative Medicine
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