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Trigeminal pain

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https://www.readbyqxmd.com/read/27898338/effect-of-pgd2-on-middle-meningeal-artery-and-mrna-expression-profile-of-l-pgd2-synthase-and-dp-receptors-in-trigeminovascular-system-and-other-pain-processing-structures-in-rat-brain
#1
Aysegül Sekeroglu, Julie Mie Jacobsen, Inger Jansen-Olesen, Saurabh Gupta, Majid Sheykhzade, Jes Olesen, Deepak K Bhatt
BACKGROUND: Prostaglandins (PGs), particularly prostaglandin D2 (PGD2), E2 (PGE2), and I2 (PGI2), are considered to play a role in migraine pain. In humans, infusion of PGD2 causes lesser headache as compared to infusion of PGE2 and PGI2. Follow-up studies in rats have shown that infusion of PGE2 and PGI2 dilate the middle meningeal artery (MMA), and mRNA for PGE2 and PGI2 receptors is present in rat trigeminovascular system (TVS) and in the brain structures associated with pain. In the present study, we have characterized the dilatory effect of PGD2 on rat MMA and studied the relative mRNA expression of PGD2 receptors and lipocalin-type of PGD2 synthase (L-PGDS)...
September 19, 2016: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/27891301/how-far-have-we-come-in-the-field-of-nerve-regeneration-after-trigeminal-nerve-injury
#2
REVIEW
Annika Rosén, Arezo Tardast, Tie-Jun Shi
Patients suffering from nerve injury with sensory disturbances or orofacial pain have greatly reduced quality of life, and it is a big cost for the society. Abnormal sensations caused by trigeminal nerve injury often become chronic, severely debilitating, and extremely difficult to treat. In general, non-invasive treatment such as drug treatment has been insufficient, and there are currently few available effective treatments. Surgical interventions such as end-to-end connection or nerve grafting have disadvantages such as donor site morbidity or formation of neuroma...
2016: Current Oral Health Reports
https://www.readbyqxmd.com/read/27886414/chronic-ghrelin-treatment-reduced-photophobia-and-anxiety-like-behaviors-in-ntg-induced-migraine-role-of-pituitary-adenylate-cyclase-activating-polypeptide
#3
Fereshteh Farajdokht, Shirin Babri, Pouran Karimi, Mohammad Reza Alipour, Ramin Bughchechi, Gisou Mohaddes
Chronic migraine is a debilitating disorder that has a significant impact on patients and society. Nearly all migraineurs frequently reported light sensitivity during a headache attack. Pituitary adenylate cyclase-activating polypeptide (PACAP) plays an important role in the activation of trigeminal system and migraine pain. To identify the effect of chronic ghrelin treatment on endogenous PACAP and associated symptoms of migraine, an experimental chronic migraine model was induced by intermittent intraperitoneal (i...
November 25, 2016: European Journal of Neuroscience
https://www.readbyqxmd.com/read/27885640/differences-in-topographical-pressure-pain-sensitivity-maps-of-the-scalp-between-patients-with-migraine-and-healthy-controls
#4
Johanna Barón, Marina Ruiz, María Palacios-Ceña, Pascal Madeleine, Ángel L Guerrero, Lars Arendt-Nielsen, César Fernández-de-Las-Peñas
OBJECTIVE: To investigate differences in topographical pressure pain sensitivity maps of the scalp between patients with migraine and healthy controls considering the chronicity (episodic/chronic) and side (strictly unilateral/bilateral) of the symptoms. BACKGROUND: It seems that the trigeminal area is sensitized in migraine. No study has investigated topographical pressure sensitivity maps of the scalp in patients with migraine. METHODS: Pressure pain thresholds (PPTs) were assessed from 21 points distributed over the scalp in 86 patients with episodic migraine, 76 with chronic migraine, and 42 healthy age and matched healthy controls in a blinded design...
November 25, 2016: Headache
https://www.readbyqxmd.com/read/27884737/botulinum-neurotoxin-type-a-alleviates-mechanical-hypersensitivity-associated-with-infraorbital-nerve-constriction-injury-in-rats
#5
Noboru Noma, Kosuke Watanabe, Yuka Sato, Yoshiki Imamura, Yumiko Yamamoto, Reio Ito, Mitsuru Maruno, Kohei Shimizu, Koichi Iwata
We investigated the effect of botulinum neurotoxin type A (BoNT-A) on mechanical allodynia and hyperalgesia associated with infraorbital nerve constriction (ION-CCI) in rats. ION-CCI rats received a subcutaneous BoNT-A injection into the whisker pad area on day 7 postoperatively and underwent pain assessment on days 14 and 21 postoperatively. Rats were assigned to one of four treatment groups (n=5 each): ION-CCI+BoNT-A 20pg (low-dose group), ION-CCI+BoNT-A 200pg (high-dose group), ION-CCI+saline, and Sham. Mechanical allodynia and hyperalgesia were evaluated preoperatively (baseline) and on days 7, 14, and 21 postoperatively...
November 21, 2016: Neuroscience Letters
https://www.readbyqxmd.com/read/27875506/nerve-combing-for-trigeminal-neuralgia-without-vascular-compression
#6
Hua Zhao, Xin Zhang, Dayin Tang, Shiting Li
OBJECTIVE: The aim of this study was to describe and evaluate the long-term clinical outcome of "nerve combing" for trigeminal neuralgia (TN) without vascular compression. METHODS: Fifteen patients with TN treated with microvascular decompression had no visible vascular compression intraoperatively. All of them underwent trigeminal nerve combing. RESULTS: The long-term excellent relief was achieved in 73.3% of patients, 2 patients had good outcome, 1 patient experienced obvious partial relief, and the intensity of the residual pain was not severe enough to require medication...
November 21, 2016: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/27867122/resolution-of-trigeminal-neuralgia-after-transvenous-embolization-of-a-cavernous-sinus-dural-arteriovenous-fistula
#7
Kenji Fukutome, Ichiro Nakagawa, Hun Soo Park, Takeshi Wada, Yasushi Motoyama, Kimihiko Kichikawa, Hiroyuki Nakase
A rare case of cavernous sinus dural arteriovenous fistula (CSDAVF) in a patient with trigeminal neuralgia (TN) that resolved immediately after transvenous embolization (TVE) is described. A 75-year-old woman presented with continuous facial pain. On time-of-flight magnetic resonance angiography (MRA), a CSDAVF was suspected, and digital subtraction angiography (DSA) showed a CSDAVF. The TN completely resolved immediately after TVE, with no recurrence. Follow-up MRA showed complete obliteration of the fistula 13 months after TVE...
November 17, 2016: World Neurosurgery
https://www.readbyqxmd.com/read/27865948/neuronal-fc-epsilon-receptor-i-contributes-to-antigen-evoked-pruritus-in-a-murine-model-of-ocular-allergy
#8
Fan Liu, Lubin Xu, Naze Chen, Mo Zhou, Chunyan Li, Qian Yang, Yikuan Xie, Yuguang Huang, Chao Ma
Pruritus is the major symptom of ocular allergy but currently available treatments are often ineffective. Previous studies demonstrated that subpopulations of primary sensory neurons express Fc receptors and may contribute to antigen-specific pain. We investigated the role of neuronal Fc-epsilon Receptor I (FcεRI) in allergic ocular pruritus. Ovalbumin (OVA) was used as allergen together with alum adjuvant (OVA+alum) to produce a mouse model of ocular allergy with a significant elevation in the serum levels of both antigen-specific IgE and IgG...
November 16, 2016: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/27865869/erk-potentiates-p38-in-central-sensitization-induced-by-traumatic-occlusion
#9
Lei Jing, Xiao-Dong Liu, Hong-Xu Yang, Mian Zhang, Ying Wang, Li Duan, Jing Zhang, Lei Lu, Ting Yang, Dong-Mei Wang, Liang-Wei Chen, Mei-Qing Wang
This study was to investigate the role of p38 activation via ERK1/2 phosphorylation in neurons and microglia of the spinal trigeminal subnucleus caudalis (Vc) in the promotion of orofacial hyperalgesia induced by unilateral anterior crossbite (UAC) traumatic occlusion in adult rats. U0126, a p-ERK1/2 inhibitor, was injected intracisternally before UAC implant. The effects of the U0126 injection were compared to those following the injection of SB203580, a p-p38 inhibitor. Mechanical hyperalgesia was evaluated via pressure pain threshold measurements...
November 16, 2016: Neuroscience
https://www.readbyqxmd.com/read/27864731/multiple-sclerosis-related-pain-syndromes-an-imaging-update
#10
REVIEW
Amir Mazhari
Pain in multiple sclerosis (MS) is a common manifestation, made up of complex phenomenon involving intricate neurophysiological processing at central levels of the pain pathway. Our understanding of the clinical and neurophysiological mechanisms of central/neuropathic pain related to MS continues to improve with improved imaging techniques but remains a challenging area of research. The advancements in imaging techniques for lesion evaluation of the various neuroanatomic structures have improved our detection, diagnosis, and understanding of MS pain and help validate subjective symptoms...
December 2016: Current Pain and Headache Reports
https://www.readbyqxmd.com/read/27864554/nostril-advantage-in-trigeminal-olfactory-perception-and-its-relation-to-handedness
#11
Simona Manescu, Benjhyna Daniel, Renée-Pier Filiou, Franco Lepore, Johannes Frasnelli
INTRODUCTION: Few studies investigated nostril-advantage in chemosensory perception, particularly, in relation to handedness. The aim of the present article was therefore to assess whether trigeminal/olfactory perception is altered by handedness. METHODS: We tested 50 (all right-handed) and 43 (22 left-handed) participants in Studies 1 and 2, respectively. We used binary mixtures of cinnamaldehyde and eucalyptol, in different proportions presented as physical mixtures (the same exact mixture presented birhinally to each nostril) or as a dichorhinic mixtures (different mixtures presented to each nostril)...
November 17, 2016: Perception
https://www.readbyqxmd.com/read/27861839/widespread-pressure-pain-hypersensitivity-is-similar-in-women-with-frequent-episodic-and-chronic-tension-type-headache-a-blinded-case-control-study
#12
María Palacios Ceña, Matteo Castaldo, Kelun Wang, Paola Torelli, Paolo Pillastrini, César Fernández-de-Las-Peñas, Lars Arendt-Nielsen
OBJECTIVE: To investigate differences in widespread pressure pain hyperalgesia in the trigemino-cervical and extra-trigeminal (distant pain-free) regions in women with frequent episodic (FETTH) and chronic (CTTH) tension-type headache. BACKGROUND: It seems that people with tension-type headache exhibit central sensitization. No study has investigated differences between FETTH and CTTH in terms of widespread pressure pain hypersensitivity. METHODS: Forty-three women with FETTH, 42 with CTTH, and 45 women without headache diagnosis were recruited...
November 11, 2016: Headache
https://www.readbyqxmd.com/read/27861830/hemicrania-continua-beneficial-effect-of-non-invasive-vagus-nerve-stimulation-in-a-patient-with-a-contraindication-for-indomethacin
#13
Ozan Eren, Andreas Straube, Florian Schöberl, Christoph Schankin
Hemicrania continua (HC) is a primary chronic headache disorder, characterized by a continuous and strictly unilateral headache, with possible cranial autonomic symptoms during episodes of pain exacerbation. The unilateral headache generally responds well to indomethacin; however, continuous indomethacin intake is often not tolerated due to severe adverse effects, like hypertension, gastrointestinal discomfort (especially if combined with aspirin), slightly increased risk of vascular events, and bronchial spasms...
November 11, 2016: Headache
https://www.readbyqxmd.com/read/27858881/efficacy-and-safety-of-continuous-radiofrequency-thermocoagulation-plus-pulsed-radiofrequency-for-treatment-of-v1-trigeminal-neuralgia-a-prospective-cohort-study
#14
Peng Yao, Tao Hong, Yong-Qiang Zhu, Hong-Xi Li, Zhi-Bin Wang, Yuan-Yuan Ding, Jia-Ming Ma, Shi-Nong Pan
Patients may develop serious eye complications after continuous radiofrequency thermocoagulation (CRF) for V1 (ophthalmic division) trigeminal neuralgia (TN) at a higher temperature. Therefore, the temperature of clinical CRF for V1 TN has long been disputed, but there have few reports been found about how to achieve satisfactory pain relief, reduce the incidence rates of complications, and shorten the recovery time after CRF for V1 TN.To observe whether pulsed radiofrequency (PRF) can lead to increased rate in pain relief, reduced rate of complications, or shortened recovery time after CRF is used to treat V1 idiopathic trigeminal neuralgia (ITN)...
November 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27856965/hedgehog-pathway-mediated-vascular-alterations-following-trigeminal-nerve-injury
#15
N Moreau, W Dieb, A Mauborgne, S Bourgoin, L Villanueva, M Pohl, Y Boucher
Whereas neurovascular interactions in spinal neuropathic pain models have been well characterized, little attention has been given to such neurovascular interactions in orofacial neuropathic pain models. This study investigated in male Sprague-Dawley rats the vascular changes following chronic constriction injury (CCI) of the infraorbital nerve (IoN), a broadly validated preclinical model of orofacial neuropathic pain. Following IoN-CCI, an early downregulation of tight junction proteins Claudin-1 and Claudin-5 was observed within the endoneurium and perineurium, associated with increased local accumulation of sodium fluorescein (NaFlu) within the IoN parenchyma, as compared with sham animals...
November 16, 2016: Journal of Dental Research
https://www.readbyqxmd.com/read/27847579/a-clinical-analysis-of-secondary-surgery-in-trigeminal-neuralgia-patients-who-failed-prior-treatment
#16
Il Ho Kang, Bong Jin Park, Chang Kyu Park, Hridayesh Pratap Malla, Sung Ho Lee, Bong Arm Rhee
OBJECTIVE: Although many treatment modalities have been introduced for trigeminal neuralgia (TN), the long-term clinical results remain unsatisfactory. It has been particularly challenging to determine an appropriate treatment strategy for patients who have responded poorly to initial therapies. We analyzed the surgical outcomes in TN patients who failed prior treatments. METHODS: We performed a retrospective analysis of 37 patients with recurrent or persistent TN symptoms who underwent surgery at our hospital between January 2010 and December 2014...
November 2016: Journal of Korean Neurosurgical Society
https://www.readbyqxmd.com/read/27843474/electroacupuncture-pretreatment-at-gb20-exerts-antinociceptive-effects-via-peripheral-and-central-serotonin-mechanism-in-conscious-migraine-rats
#17
Lu Liu, Pei Pei, Luo-Peng Zhao, Zheng-Yang Qu, Yu-Pu Zhu, Lin-Peng Wang
Background. While electroacupuncture (EA) pretreatment in migraine has been found to attenuate pain and frequencies of attacks, the underlying mechanism of its antinociceptive effect remains poorly understood. Emerging evidence suggests that the serotonin system may be involved in migraine pathophysiology. Method. Forty male Sprague-Dawley rats were randomly assigned to Control, Model, EA, and sham acupuncture (SA) groups. HomeCageScan was used to measure the effects on spontaneous nociceptive behaviors. Radioimmunoassay and high-performance liquid chromatography were used to evaluate the expression of 5-hydroxytryptamine (HT) in the plasma and three-key structure of the descending pain modulatory system...
2016: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/27836326/diabetes-mellitus-influences-the-expression-of-npy-and-vegf-in-neurons-of-rat-trigeminal-ganglion
#18
Milka Jerić, Katarina Vukojević, Ana Vuica, Natalija Filipović
BACKGROUND: Diabetes mellitus (DM) influences the trigeminal nerve function by changing the pain response and transduction of the orofacial sensory pathways. It affects the inflammatory response via neuropeptide Y (NPY) and vascular endothelial growth factor (VEGF), which could potentially have a relevant role in the pathophysiology of diabetic neuropathy. The aim was to investigate expression of VEGF and NPY in subpopulations of trigeminal ganglion (TG) neurons in rat models of early DM1 and DM2...
November 3, 2016: Neuropeptides
https://www.readbyqxmd.com/read/27836101/tumor-necrosis-factor-alpha-stimulates-cytokine-expression-and-transient-sensitization-of-trigeminal-nociceptive-neurons
#19
Zachary L Durham, Jordan L Hawkins, Paul L Durham
OBJECTIVE: Elevated levels of tumor necrosis factor- alpha (TNF-α) in the capsule of the temporomandibular joint (TMJ) are implicated in the underlying pathology of temporomandibular disorders (TMD). TMD are a group of conditions that result in pain in the TMJ and/or muscles of mastication, and are associated with significant social and economic burdens. The goal of this study was to investigate the effect of elevated TNF-α levels in the TMJ capsule on nocifensive behavioral response to mechanical stimulation of trigeminal neurons and regulation of cytokines within the trigeminal ganglion...
November 4, 2016: Archives of Oral Biology
https://www.readbyqxmd.com/read/27833694/large-posterior-communicating-artery-aneurysm-initial-presentation-with-reproducible-facial-pain-without-cranial-nerve-deficit
#20
Stacie Zelman, Michael C Goebel, David E Manthey, Seth Hawkins
Unruptured posterior communicating artery (PCOM) aneurysms can be difficult to diagnose and, when large (≥ 7mm), represent a substantial risk to the patient. While most unruptured PCOM aneurysms are asymptomatic, when symptoms do occur, clinical manifestations typically include severe headache (HA), visual acuity loss, and cranial nerve deficit. This case report describes an atypical initial presentation of a large unruptured PCOM aneurysm with symptoms mimicking trigeminal neuralgia, without other associated cranial nerve palsies or neurologic deficits...
November 2016: Western Journal of Emergency Medicine
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