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Calcitonin gene-related peptide

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https://www.readbyqxmd.com/read/28229359/thyroid-volume-and-serum-calcitonin-changes-during-pregnancy
#1
G Vannucchi, D Covelli, B Vigo, M Perrino, L Mondina, L Fugazzola
BACKGROUND: Pregnancy has a profound impact on thyroid homeostasis which results in change of thyroid function and thyroid volume (TV). Moreover, calcitonin (CT), and its gene-related peptide have been demonstrated to play an important role in the implantation process. PURPOSE: To evaluate changes in TV and serum CT levels during pregnancy. METHODS: One hundred and fifty-five pregnant women were consecutively enrolled at the first trimester of gestation and underwent clinical, biochemical and sonographic assessment at enrollment, at the second and third trimesters and at 6 months after delivery...
February 22, 2017: Journal of Endocrinological Investigation
https://www.readbyqxmd.com/read/28225715/the-role-of-cgrp-in-peripheral-and-central-pain-mechanisms-including-migraine
#2
Smriti Iyengar, Michael H Ossipov, Kirk W Johnson
Calcitonin gene-related peptide (CGRP) is a 37-amino acid peptide found primarily in the C and Aδ sensory fibers arising from the dorsal root and trigeminal ganglia, as well as the central nervous system. CGRP was found to play important roles in cardiovascular, digestive, and sensory functions. Although the vasodilatory properties of CGRP are well documented, its somatosensory function regarding modulation of neuronal sensitization and of enhanced pain has received considerable attention recently. Growing evidence indicates that CGRP plays a key role in the development of peripheral sensitization and the associated enhanced pain...
December 29, 2016: Pain
https://www.readbyqxmd.com/read/28223844/neuronal-plasticity-of-trigeminal-ganglia-in-mice-following-nerve-injury
#3
Randi Lynds, Chuang Lyu, Gong-Wei Lyu, Xie-Qi Shi, Annika Rosén, Kamal Mustafa, Tie-Jun Sten Shi
BACKGROUND: Nerve injury may induce neuropathic pain. In studying the mechanisms of orofacial neuropathic pain, attention has been paid to the plastic changes that occur in the trigeminal ganglia (TGs) and nucleus in response to an injury of the trigeminal nerve branches. Previous studies have explored the impact of sciatic nerve injury on dorsal root ganglia (DRGs) and it has shown dramatic changes in the expression of multiple biomarkers. In large, the changes in biomarker expression in TGs after trigeminal nerve injury are similar to that in DRGs after sciatic nerve injury...
2017: Journal of Pain Research
https://www.readbyqxmd.com/read/28215304/neurotrophins-and-migraine
#4
L B Martins, A L Teixeira, R B Domingues
Neurotrophins (NTs) have been implicated in generation and modulation of nociceptive pathways. Change in NTs levels is associated with painful conditions and neurological diseases such as migraine. Currently, it is generally recognized that migraine headaches result from the activation and sensitization of trigeminal sensory afferent fibers leading to neuropeptides release such as calcitonin gene-related peptide (CGRP) and substance P (SP). This triggers an inflammatory cascade causing a neurogenic inflammation...
2017: Vitamins and Hormones
https://www.readbyqxmd.com/read/28212299/exogenous-and-endogenous-hydrogen-sulfide-protects-gastric-mucosa-against-the-formation-and-time-dependent-development-of-ischemia-reperfusion-induced-acute-lesions-progressing-into-deeper-ulcerations
#5
Marcin Magierowski, Katarzyna Magierowska, Magdalena Hubalewska-Mazgaj, Zbigniew Sliwowski, Robert Pajdo, Grzegorz Ginter, Slawomir Kwiecien, Tomasz Brzozowski
Hydrogen sulfide (H₂S) is an endogenous mediator, synthesized from l-cysteine by cystathionine γ-lyase (CSE), cystathionine β-synthase (CBS) or 3-mercaptopyruvate sulfurtransferase (3-MST). The mechanism(s) involved in H₂S-gastroprotection against ischemia/reperfusion (I/R) lesions and their time-dependent progression into deeper gastric ulcerations have been little studied. We determined the effect of l-cysteine, H₂S-releasing NaHS or slow H₂S releasing compound GYY4137 on gastric blood flow (GBF) and gastric lesions induced by 30 min of I followed by 3, 6, 24 and 48 h of R...
February 15, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28210078/sex-differences-and-effects-of-oestrogen-in-rat-gastric-mucosal-defence
#6
Richard Shore, Håkan Björne, Yoko Omoto, Anna Siemiatkowska, Jan-Åke Gustafsson, Mats Lindblad, Lena Holm
AIM: To evaluate sex differences and the effects of oestrogen administration in rat gastric mucosal defence. METHODS: Sex differences in gastric mucus thickness and accumulation rate, absolute gastric mucosal blood flow using microspheres, the integrity of the gastric mucosal epithelium in response to a chemical irritant and the effects of oestrogen administration on relative gastric mucosal blood flow in an acute setting was assessed in an in vivo rat experimental model...
January 21, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28209481/botulinum-toxin-type-a-reduces-inflammatory-hypernociception-induced-by-arthritis-in-the-temporomadibular-joint-of-rats
#7
Victor Ricardo Manuel Muñoz Lora, Juliana Trindade Clemente-Napimoga, Henrique Ballassini Abdalla, Cristina Gomes Macedo, Giancarlo de la Torre Canales, Celia Marisa Rizzatti Barbosa
OBJECTIVE: This study aimed to investigate the antinociceptive effects of Botulinum toxin type A (BoNT-A) on persistent inflammatory hypernociception induced by arthritis in the temporomandibular joint (TMJ) of rats. MATERIAL AND METHODS: Wistar rats were induced to persistent inflammatory hypernociception in the left TMJ. Then, animals were treated with intra-TMJ injections of BoNT-A, using doses of 3.5, 7 and 14 U/kg. Saline was used as control group. Behavioral tests were applied to evaluated the effect of BoNT-A in the inflammatory hypernociception...
February 14, 2017: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/28205139/the-potentiating-effect-of-calcitonin-gene-related-peptide-on-transient-receptor-potential-vanilloid-1-activity-and-the-electrophysiological-responses-of-rat-trigeminal-neurons-to-nociceptive-stimuli
#8
Duangthip Chatchaisak, Mark Connor, Anan Srikiatkhachorn, Banthit Chetsawang
Growing evidence suggests that calcitonin gene-related peptide (CGRP) participates in trigeminal nociceptive responses. However, the role of CGRP in sensitization or desensitization of nociceptive transduction remains poorly understood. In this study, we sought to further investigate the CGRP-induced up-regulation of transient receptor potential vanilloid-1 (TRPV1) and the responses of trigeminal neurons to nociceptive stimuli. Rat trigeminal ganglion (TG) organ cultures and isolated trigeminal neurons were incubated with CGRP...
February 15, 2017: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/28202186/stimulation-of-rat-cranial-dura-mater-with-potassium-chloride-causes-cgrp-release-into-the-cerebrospinal-fluid-and-increases-medullary-blood-flow
#9
Mária Dux, Christine Will, Mirjam Eberhardt, Michael J M Fischer, Karl Messlinger
Primary headaches may be accompanied by increased intracranial blood flow induced by the release of the potent vasodilator calcitonin gene-related peptide (CGRP) from activated meningeal afferents. We aimed to record meningeal and medullary blood flow simultaneously and to localize the sites of CGRP release in rodent preparations in vivo and ex vivo. Blood flow in the exposed rat parietal dura mater and the medulla oblongata was recorded by laser Doppler flowmetry, while the dura was stimulated by topical application of 60mM potassium chloride (KCl)...
February 10, 2017: Neuropeptides
https://www.readbyqxmd.com/read/28194136/substance-p-and-calcitonin-gene-related-peptide-key-regulators-of-cutaneous-microbiota-homeostasis
#10
REVIEW
Awa N'Diaye, Andrei Gannesen, Valérie Borrel, Olivier Maillot, Jeremy Enault, Pierre-Jean Racine, Vladimir Plakunov, Sylvie Chevalier, Olivier Lesouhaitier, Marc G J Feuilloley
Neurohormones diffuse in sweat and epidermis leading skin bacterial microflora to be largely exposed to these host factors. Bacteria can sense a multitude of neurohormones, but their role in skin homeostasis was only investigated recently. The first study focused on substance P (SP), a neuropeptide produced in abundance by skin nerve terminals. SP is without effect on the growth of Gram-positive (Bacillus cereus, Staphylococcus aureus, and Staphylococcus epidermidis) and Gram-negative (Pseudomonas fluorescens) bacteria...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28192258/binding-and-functional-pharmacological-characteristics-of-gepant-type-antagonists-in-rat-brain-and-mesenteric-arteries
#11
Majid Sheykhzade, Nilofar Amandi, Monica Vidal Pla, Bahareh Abdolalizadeh, Anette Sams, Karin Warfvinge, Lars Edvinsson, Darryl S Pickering
AIM: The neuropeptide calcitonin gene-related peptide (CGRP) is found in afferent sensory nerve fibers innervating the resistance arteries and plays a pivotal role in a number of neurovascular diseases such as migraine and subarachnoid bleedings. The present study investigates the binding and antagonistic characteristics of small non-peptide CGRP receptor antagonists (i.e. gepants) in isolated rat brain and mesenteric resistance arteries. METHODS: The antagonistic behavior of gepants was investigated in isolated rat mesenteric arteries using a wire myograph setup while binding of gepants to CGRP receptors was investigated in rat brain membranes using a radioligand competitive binding assay...
February 10, 2017: Vascular Pharmacology
https://www.readbyqxmd.com/read/28185482/suckling-induced-activation-pattern-in-the-brain-of-rat-pups
#12
János Barna, Eva Renner, Antónia Arszovszki, Melinda Cservenák, Zsolt Kovács, Miklós Palkovits, Arpád Dobolyi
OBJECTIVES: The aim of the study was to understand the effects of suckling on the brain of the pups by mapping their brain activation pattern in response to suckling. METHODS: The c-fos method was applied to identify activated neurons. Fasted rat pups were returned to their mothers for suckling and sacrificed 2 hours later for Fos immunohistochemistry. Double labeling was also performed to characterize some of the activated neurons. For comparison, another group of fasted pups were given dry food before Fos mapping...
February 10, 2017: Nutritional Neuroscience
https://www.readbyqxmd.com/read/28185314/beta-3-adrenergic-receptor-is-expressed-in-acetylcholine-containing-nerve-fibers-of-the-human-urinary-bladder-an-immunohistochemical-study
#13
Ana Coelho, Tiago Antunes-Lopes, James Gillespie, Francisco Cruz
AIMS: To identify in the human bladder the structures which express the Beta-3 adrenoceptor (β3AR). METHODS: Human bladders from cadaveric organ donors (equally balanced in sex and age) were collected. Bladders were immediately fixed in paraformaldehyde and further processed for cryostat sectioning. Single and double immunohistochemistry was performed using antibodies against β3AR C-terminal, β3AR N-terminal, a pan-neuronal marker (β3-Tubulin) and markers of cholinergic (Vesicular Acetylcholine Transporter), adrenergic (Tyrosine Hidroxylase), and peptidergic (Calcitonin Gene-Related Peptide) nerve fibers...
February 10, 2017: Neurourology and Urodynamics
https://www.readbyqxmd.com/read/28181572/effects-of-taxol-on-regeneration-in-a-rat-sciatic-nerve-transection-model
#14
Shih-Tien Hsu, Chun-Hsu Yao, Yuan-Man Hsu, Jia-Horng Lin, Yung-Hsiang Chen, Yueh-Sheng Chen
Recent studies describe taxol as a candidate treatment for promoting central nerve regeneration. However, taxol has serious side effects including peripheral neurotoxicity, and little information is known about the effect of taxol on peripheral nerve regeneration. We investigated the effects of taxol on regeneration in a rat sciatic nerve transection model. Rats were divided into four groups (n = 10): normal saline (i.p.) as the control, Cremophor EL vehicle, and 2 or 6 mg/kg of taxol in the Cremophor EL solution (four times in day-2, 4, 6, and 8), respectively...
February 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28181496/haplotype-based-case-control-study-of-the-receptor-calcitonin-activity-modifying-protein-ramp-1-gene-in-essential-hypertension
#15
T Nakayama, T Nakazato, H Naruse, Z Fu, Z Wang, M Soma, T Hoshino, M Shimodaira, N Aoi
The adrenomedullin receptor is a complex molecule that comprises the calcitonin-receptor-like receptor (CRLR) and the receptor-activity-modifying protein (RAMP). RAMP1 is a vasodilation factor, and RAMP1-deficient mice (RAMP1(-/-)) exhibit inflammatory responses with a significant transient increase in serum calcitonin-gene-related peptide levels and proinflammatory cytokines when compared with RAMP1(+/+) mice. The purpose of the present study was to investigate the relationships between essential hypertension (EH) and RAMP1 gene single-nucleotide polymorphisms (SNPs) or haplotypes in a Japanese population via a case-control study...
February 9, 2017: Journal of Human Hypertension
https://www.readbyqxmd.com/read/28179394/pathophysiology-of-migraine-a-disorder-of-sensory-processing
#16
REVIEW
Peter J Goadsby, Philip R Holland, Margarida Martins-Oliveira, Jan Hoffmann, Christoph Schankin, Simon Akerman
Plaguing humans for more than two millennia, manifest on every continent studied, and with more than one billion patients having an attack in any year, migraine stands as the sixth most common cause of disability on the planet. The pathophysiology of migraine has emerged from a historical consideration of the "humors" through mid-20th century distraction of the now defunct Vascular Theory to a clear place as a neurological disorder. It could be said there are three questions: why, how, and when? Why: migraine is largely accepted to be an inherited tendency for the brain to lose control of its inputs...
April 2017: Physiological Reviews
https://www.readbyqxmd.com/read/28179153/activation-of-npffr2-leads-to-hyperalgesia-through-the-spinal-inflammatory-mediator-cgrp-in-mice
#17
Ya-Tin Lin, Ho-Ling Liu, Yuan-Ji Day, Che-Chien Chang, Po-Hung Hsu, Jin-Chung Chen
Neuropeptide FF (NPFF) is recognized as an opioid modulating peptide that regulates morphine-induced analgesia. The aim of this study was to delineate the role of NPFFR2 in pain transmission. We found the expression levels of NPFF and NPFFR2 were increased in the lumbar dorsal horn of animals with CFA- and carrageenan-induced inflammation and both NPFFR2 over-expressing transgenic (NPFFR2-Tg) and NPFFR2 agonist-treated mice displayed hyperalgesia. BOLD signals from functional MRI showed that NPFFR2-Tg mice exhibited increased activation of pain-related brain regions after painful stimulation when compared to WT mice...
February 5, 2017: Experimental Neurology
https://www.readbyqxmd.com/read/28176234/frequent-mild-head-injury-promotes-trigeminal-sensitivity-concomitant-with-microglial-proliferation-astrocytosis-and-increased-neuropeptide-levels-in-the-trigeminal-pain-system
#18
Ashley L Tyburski, Lan Cheng, Soroush Assari, Kurosh Darvish, Melanie B Elliott
BACKGROUND: Frequent mild head injuries or concussion along with the presence of headache may contribute to the persistence of concussion symptoms. METHODS: In this study, the acute effects of recovery between mild head injuries and the frequency of injuries on a headache behavior, trigeminal allodynia, was assessed using von Frey testing up to one week after injury, while histopathological changes in the trigeminal pain pathway were evaluated using western blot, ELISA and immunohistochemistry...
December 2017: Journal of Headache and Pain
https://www.readbyqxmd.com/read/28165287/cgrp-receptor-antagonist-activity-of-olcegepant-depends-on-the-signalling-pathway-measured
#19
Christopher S Walker, Ann C Raddant, Michael J Woolley, Andrew F Russo, Debbie L Hay
Background Calcitonin gene-related peptide (CGRP) is a neuropeptide that acts in the trigeminovascular system and is believed to play an important role in migraine. CGRP activates two receptors that are both present in the trigeminovascular system; the CGRP receptor and the amylin 1 (AMY1) receptor. CGRP receptor antagonists, including olcegepant (BIBN4096BS) and telcagepant (MK-0974), can treat migraine. This study aimed to determine the effectiveness of these antagonists at blocking CGRP receptor signalling in trigeminal ganglia (TG) neurons and transfected CGRP and AMY1 receptors in Cos7 cells, to better understand their mechanism of action...
January 1, 2017: Cephalalgia: An International Journal of Headache
https://www.readbyqxmd.com/read/28163105/nerve-growth-factor-derivative-ngf61-100-promotes-outgrowth-of-primary-sensory-neurons-with-reduced-signs-of-nociceptive-sensitization
#20
C Severini, P Petrocchi Passeri, M T Ciotti, F Florenzano, C Petrella, F Malerba, B Bruni, M D'Onofrio, I Arisi, R Brandi, R Possenti, P Calissano, A Cattaneo
Nerve Growth Factor (NGF) is being considered as a therapeutic candidate for Alzheimer's disease. However, the development of an NGF-based therapy is limited by its potent pain activity. We have developed a "painless" derivative form of human NGF (NGF61/100), characterized by identical neurotrophic properties but a reduced nociceptive sensitization activity in vivo. Here we characterized the response of rat dorsal root ganglia neurons (DRG) to the NGF derivative NGF61/100, in comparison to that of control NGF (NGF61), analyzing the expression of noxious pro-nociceptive mediators...
February 2, 2017: Neuropharmacology
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