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Small fiber neuropathy

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https://www.readbyqxmd.com/read/28526993/microvascular-complications-associated-with-rapid-improvements-in-glycemic-control-in-diabetes
#1
REVIEW
Christopher H Gibbons, Ann Goebel-Fabbri
PURPOSE OF REVIEW: Aggressive glycemic control has become the standard clinical approach to diabetes care. Unintended consequences have included the development of microvascular complications that are related to the rapidity of glycemic improvement. RECENT FINDINGS: Diabetic neuropathy may develop in up to 10% of individuals secondary to aggressive glycemic control. The neuropathy is predominantly small fiber sensory and autonomic, and the severity of the neuropathy is tied to the change in the glycosylated hemoglobin A1C...
July 2017: Current Diabetes Reports
https://www.readbyqxmd.com/read/28522768/a-model-for-in-vivo-analysis-of-sudomotor-sympathetic-c-fiber-activation-and-human-sweat-gland-output
#2
Gary W Mack
Quantitative assessment of small fiber peripheral neuropathy often involves an evaluation of the interaction between the C-fiber sudomotor nerve and local sweat rate (SR). Typically, some sort of quantitative sudomotor axon reflex test (QSART) is performed to aid in diagnosing small fiber dysfunction. The currently used QSART demonstrates only moderate test-retest reliability and therefore limits its usefulness in tracking small fiber dysfunction. A new experimental model to examine small C-fiber function in the skin using intradermal electrical stimulation and simultaneous monitoring of SR is proposed...
May 18, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28521198/clinical-characteristics-and-risk-factors-of-diabetic-peripheral-neuropathy-of-type-1-diabetes-mellitus-patients
#3
Xia Zhang, Chen Fang, Xiang Li, Yong-Jun Cao, Qi-Lin Zhang, Hong-Hong Zhang, Yun Huang, Ji Hu, Chun-Feng Liu
BACKGROUND: Small nerve fibers are more easily injured than large ones for diabetic peripheral neuropathy (DPN). The study investigated the characteristics and related risk factors of DPN of T1DM patients using nerve conduction velocity and CPT values, which provided evidences for its early diagnosis. METHODS: 70 T1DM patients and 48 healthy volunteers were included. All subjects accepted nerve conduction velocity and CPT examinations for four limbs. Detailed clinical indicators were recorded...
April 25, 2017: Diabetes Research and Clinical Practice
https://www.readbyqxmd.com/read/28493226/-etiology-and-pathophysiology-of-fibromyalgia-syndrome-updated-guidelines-2017-overview-of-systematic-review-articles-and-overview-of-studies-on-small-fiber-neuropathy-in-fms-subgroups
#4
N Üçeyler, M Burgmer, E Friedel, W Greiner, F Petzke, M Sarholz, M Schiltenwolf, A Winkelmann, C Sommer, W Häuser
BACKGROUND: The regular update of the guidelines on fibromyalgia syndrome, AWMF number 145/004, was planned for April 2017. METHODS: The guidelines were developed by 13 scientific societies and 2 patient self-help organizations coordinated by the German Pain Society. Working groups (n =8) with a total of 42 members were formed balanced with respect to gender, medical expertise, position in the medical or scientific hierarchy and potential conflicts of interest...
May 10, 2017: Der Schmerz
https://www.readbyqxmd.com/read/28475703/cibinetide-improves-corneal-nerve-fiber-abundance-in-patients-with-sarcoidosis-associated-small-nerve-fiber-loss-and-neuropathic-pain
#5
Daniel A Culver, Albert Dahan, Daiva Bajorunas, Maria Jeziorska, Monique van Velzen, Leon P H J Aarts, Jinny Tavee, Martijn R Tannemaat, Ann N Dunne, Rita I Kirk, Ioannis N Petropoulos, Anthony Cerami, Rayaz A Malik, Michael Brines
Purpose: Sarcoidosis frequently is complicated by small nerve fiber loss (SNFL), which can be quantified using corneal confocal microscopy (CCM). Prior studies suggest that the innate repair receptor agonist cibinetide reverses corneal nerve loss. This phase 2b, 28-day, randomized trial of 64 subjects with sarcoid-associated SNFL and neuropathic pain assessed the effect of cibinetide on corneal nerve fiber area (CNFA) and regenerating intraepidermal fibers (GAP-43+) as surrogate endpoints for disease modification, pain severity, and functional capacity (6-minute walk test [6MWT])...
May 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28468842/novel-mutations-in-dystonin-provide-clues-to-the-pathomechanisms-of-hsan-vi
#6
Fiore Manganelli, Silvia Parisi, Maria Nolano, Feifei Tao, Simona Paladino, Chiara Pisciotta, Stefano Tozza, Claudia Nesti, Adriana P Rebelo, Vincenzo Provitera, Filippo M Santorelli, Michael E Shy, Tommaso Russo, Stephan Zuchner, Lucio Santoro
OBJECTIVE: To describe a second hereditary sensory autonomic neuropathy type VI (HSAN-VI) family harboring 2 novel heterozygous mutations in the dystonin (DST) gene and to evaluate their effect on neurons derived from induced pluripotent stem cells (iPSC). METHODS: The family consisted of 3 affected siblings from nonconsanguineous healthy parents. All members underwent clinical and electrophysiologic evaluation and genetic analysis. Two patients underwent quantitative sensory testing (QST), cardiovascular reflexes, dynamic sweat test, and skin biopsy to evaluate somatic and autonomic cutaneous innervation and to get fibroblast cultures for developing iPSC-derived neurons...
May 3, 2017: Neurology
https://www.readbyqxmd.com/read/28458631/inhibition-of-mitochondrial-p53-accumulation-by-pft-%C3%AE-prevents-cisplatin-induced-peripheral-neuropathy
#7
Magdalena A Maj, Jiacheng Ma, Karen N Krukowski, Annemieke Kavelaars, Cobi J Heijnen
Chemotherapy-induced peripheral neuropathy (CIPN), a debilitating major side effect of cancer treatment, is characterized by pain and sensory loss in hand and feet. Platinum-based chemotherapeutics like cisplatin frequently induce CIPN. The molecular mechanism underlying these neurotoxic symptoms is incompletely understood and there are no preventive or curative interventions. We hypothesized that cisplatin acts as a cellular stressor that triggers p53 accumulation at mitochondria, leading to mitochondrial dysfunction and CIPN...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28429515/a-device-to-measure-secretion-of-individual-sweat-glands-for-diagnosis-of-peripheral-neuropathy
#8
Adam J Loavenbruck, James S Hodges, Vincenzo Provitera, Maria Nolano, Gwen Wendelshafer-Crabb, William R Kennedy
INTRODUCTION: There is a need for quantitative, precise assessment of small fiber peripheral nerve function. We tested a customized camera device and protocol designed to quantify secretions of individual sweat glands (SGs). MATERIALS AND METHODS: Testing was performed on 178 healthy controls and 20 neuropathy subjects. Sweating was stimulated on a 2.25 cm(2) skin area by iontophoresis of pilocarpine. The camera imaged sweat from 50-400 sweat ducts. We calculated secretion rate of individual SGs, total sweat volume, and number of secreting SGs at four body sites...
April 21, 2017: Journal of the Peripheral Nervous System: JPNS
https://www.readbyqxmd.com/read/28422829/impact-of-pain-on-cognitive-functions-in-primary-sj%C3%A3-gren-syndrome-with-small-fiber-neuropathy-10-cases-and-a-literature-review
#9
REVIEW
Sandrine Indart, Jacques Hugon, Pierre Jean Guillausseau, Alice Gilbert, Julien Dumurgier, Claire Paquet, Damien Sène
Primary Sjögren syndrome (pSS) is a chronic systemic autoimmune disease characterized by xerophthalmia, xerostomia, and potential peripheral or central neurological involvement. In pSS, the prevalence of cognitive disorders is generally sparse across literature and the impact of pain on cognitive profile is unclear. The aim of this study was to determine the relation between pain, cognitive complaint, and impairment in a very homogenous population of 10 pSS patients with painful small fiber neuropathy (PSFN) and spontaneous cognitive complaint...
April 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28421205/the-preferential-impairment-of-pupil-constriction-stimulated-by-blue-light-in-patients-with-type-2-diabetes-without-autonomic-neuropathy
#10
Fukashi Ishibashi, Rie Kojima, Miki Taniguchi, Aiko Kosaka, Harumi Uetake, Mitra Tavakoli
The main aim of the present paper is to examine whether the pupillary light reflex (PLR) mediated by intrinsically photosensitive retinal ganglion cells (ipRGCs) is impaired in type 2 diabetic patients. One hundred and three diabetic patients without diabetic autonomic neuropathy (DAN) and 42 age-matched controls underwent a series of detailed neurological examinations. The patients were stratified into three groups: stage I, no neuropathy; stage II, asymptomatic neuropathy; stage III, symptomatic but without DAN...
2017: Journal of Diabetes Research
https://www.readbyqxmd.com/read/28414705/small-fiber-neuropathy-or-small-fiber-pathology
#11
Franco Gemignani
No abstract text is available yet for this article.
May 2017: Pain
https://www.readbyqxmd.com/read/28410768/-small-fiber-neuropathy
#12
V Langlois, A-L Bedat Millet, M Lebesnerais, S Miranda, F Marguet, Y Benhamou, P Marcorelles, H Lévesque
Small fiber neuropathy (SFN) is still unknown. Characterised by neuropathic pain, it typically begins by burning feet, but could take many other expression. SFN affects the thinly myelinated Aδ and unmyelinated C-fibers, by an inherited or acquired mechanism, which could lead to paresthesia, thermoalgic disorder or autonomic dysfunction. Recent studies suggest the preponderant role of ion channels such as Nav1.7. Furthermore, erythromelalgia or burning mouth syndrome are now recognized as real SFN. Various aetiologies of SFN are described...
April 11, 2017: La Revue de Médecine Interne
https://www.readbyqxmd.com/read/28393570/tafamidis-delays-disease-progression-in-patients-with-early-stage-transthyretin-familial-amyloid-polyneuropathy-additional-supportive-analyses-from-the-pivotal-trial
#13
Denis Keohane, Jeffrey Schwartz, Balarama Gundapaneni, Michelle Stewart, Leslie Amass
BACKGROUND: Tafamidis, a non-NSAID highly specific transthyretin stabilizer, delayed neurologic disease progression as measured by Neuropathy Impairment Score-Lower Limbs (NIS-LL) in an 18-month, double-blind, placebo-controlled randomized trial in 128 patients with early-stage transthyretin V30M familial amyloid polyneuropathy (ATTRV30M-FAP). The current post hoc analyses aimed to further evaluate the effects of tafamidis in delaying ATTRV30M-FAP progression in this trial. METHODS: Pre-specified, repeated-measures analysis of change from baseline in NIS-LL in this trial (ClinicalTrials...
April 10, 2017: Amyloid: the International Journal of Experimental and Clinical Investigation
https://www.readbyqxmd.com/read/28380320/reappraisal-of-the-f-m-amplitude-ratio-in-carpal-tunnel-syndrome
#14
F Ginanneschi, M Mondelli, A Aretini, Alessandro Rossi
The F-wave/M-wave amplitude (F/M-amp) ratio has been shown to be increased in peripheral neuropathies, provided the maximum M-wave is relatively preserved. Reduced M-wave amplitudes and central facilitation of antidromically-induced reactivation of the anterior horn cells' axon hillocks (F-wave) are believed to contribute to higher F/M-amp ratios. The present study was undertaken to re-evaluate mechanisms responsible for higher F/M-amp ratios in carpal tunnel syndrome (CTS). We enrolled 232 cases affected by CTS and 108 controls...
January 2017: Functional Neurology
https://www.readbyqxmd.com/read/28358709/lack-of-definite-association-of-vitamin-d-deficiency-with-diabetic-neuropathy-investigation-in-greek-and-in-bangladeshi-patients
#15
Thomas Zambelis, George Papadakis, Panagiotis Kokotis, Vassiliki Villiotou, Nikolaos Dogkas, Nikolaos Karandreas
AIM: Determination of the 25(OH) vitamin D levels in Greek-born and in Bangladeshi immigrant patients in Greece with diabetes with and without polyneuropathy. MATERIALS AND METHODS: The method for the detection and staging of polyneuropathy proposed by Dyck, 1988 was used. RESULTS: A total of 111 Bangladeshi immigrants and 101 Greek diabetic patients took part in the study. Vitamin D levels were significantly lower in Bangladeshi than in Greek diabetic patients, and were significantly lower in Greek patients with small-fiber neuropathy...
March 2017: In Vivo
https://www.readbyqxmd.com/read/28339448/efficacious-dorsal-root-ganglion-stimulation-for-painful-small-fiber-neuropathy-a-case-report
#16
Paolo Maino, Eva Koetsier, Alain Kaelin-Lang, Claudio Gobbi, Roberto Perez
Small fiber neuropathy is a disorder of the peripheral nerves with typical symptoms of burning, sharp, and shooting pain and sensory disturbances in the feet. Pain treatment depends principally on the underlying etiology with concurrent administration of antidepressants, anticonvulsants, opioids, and topical treatments like capsaicin and local anesthetics. However, treatments for pain relief in these patients frequently fail. We describe the first case of intractable painful small fiber neuropathy of the foot successfully treated with spinal cord stimulation of the left L5 dorsal root ganglion...
March 2017: Pain Physician
https://www.readbyqxmd.com/read/28325598/sudomotor-dysfunction-as-a-measure-of-small-fiber-neuropathy-in-type-1-diabetes
#17
Lynn Ang, Mamta Jaiswal, Brian Callaghan, David Raffel, Morton B Brown, Rodica Pop-Busui
BACKGROUND: This study evaluated whether measuring the electrochemical skin conductance (ESC), as an indirect measure of sudomotor function, may be also a reliable surrogate for early cardiovascular autonomic neuropathy (CAN). METHODS: Longitudinal study included 37 type 1 diabetes (T1D) subjects (mean age 38±13years, duration 15±7years, HbA1c 7.9±1.1%, no known complications at baseline), and 40 age-matched healthy control (HC) subjects. Mean hands ESC (ESChands) and feet (ESCfeet) were measured with the SUDOSCAN (Impeto Medical, France)...
March 10, 2017: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/28323403/discovery-of-potent-antiallodynic-agents-for-neuropathic-pain-targeting-p2x3-receptors
#18
Young-Hwan Jung, Yong-Chul Kim, Yeo Ok Kim, Hai Lin, Joong-Heui Cho, Jin-Hee Park, So-Deok Lee, Jinsu Bae, Koon Mook Kang, Yoon Gyoon Kim, Ae Nim Pae, Hyojin Ko, Chul-Seung Park, Myung Ha Yoon
Antagonism of the P2X3 receptor is one of the potential therapeutic strategies for the management of neuropathic pain because P2X3 receptors are predominantly localized on small to medium diameter C- and Aδ-fiber primary afferent neurons, which are related to the pain-sensing system. In this study, 5-hydroxy pyridine derivatives were designed, synthesized, and evaluated for their in vitro biological activities by two-electrode voltage clamp assay at hP2X3 receptors. Among the novel hP2X3 receptor antagonists, intrathecal treatment of compound 29 showed parallel efficacy with pregabalin (calcium channel modulator) and higher efficacy than AF353 (P2X3 receptor antagonist) in the evaluation of its antiallodynic effects in spinal nerve ligation rats...
March 21, 2017: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/28318820/sarcoidosis-associated-small-fiber-neuropathy-in-a-large-cohort-clinical-aspects-and-response-to-ivig-and-anti-tnf-alpha-treatment
#19
Jinny O Tavee, Karen Karwa, Zubair Ahmed, Nicolas Thompson, Joseph Parambil, Daniel A Culver
OBJECTIVE: Small fiber neuropathy commonly affects patients with sarcoidosis and is often refractory to standard immunosuppressive therapies used for systemic disease. The clinical features of sarcoidosis-associated small fiber neuropathy (SSFN) and its response to medical therapy have not been described in a large population. METHODS: We performed a retrospective review of patients with SSFN seen at the Cleveland Clinic over a 4-year period. RESULTS: SSFN was identified in 143 individuals although other causes of neuropathy were found in 28 cases...
March 9, 2017: Respiratory Medicine
https://www.readbyqxmd.com/read/28301890/kasuistik-late-onset-small-fiber-neuropathie-nach-kritischer-erkrankung
#20
Susanne Koch, Rabih Moshourab, Tobias Wollersheim, Claudia Spies, Thomas Fritzsche, Steffen Weber-Carstens
A 42-year-old patient presented with acute allodynia and hyperalgesia in her distal limbs, most severe in the innervation area of the ulnar nerve. The patient developed critical illness myopathy/polyneuropathy after septic shock 5 months prior to her presentation. After exclusion of differential diagnosis, "late onset small fiber neuropathy" after critical illness was diagnosed. Recent studies showed small fiber lesions during critical illness and in follow-up exams, where additionally neuropathic pain were proved...
March 2017: Anästhesiologie, Intensivmedizin, Notfallmedizin, Schmerztherapie: AINS
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