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https://www.readbyqxmd.com/read/29077516/sfn-siq-sfnsl-and-skin-biopsy-of-55-cases-with-small-fiber-involvement
#1
Bo Sun, Yifan Li, Lizhi Liu, Zhaohui Chen, Li Ling, Fei Yang, Jiexiao Liu, Hong Liu, Xusheng Huang
INTRODUCTION: To date, there are no validated screening scales for small fiber neuropathy (SFN). This study investigated the Small-Fiber Neuropathy and Symptom Inventory Questionnaire (SFN-SIQ) as well as the Small Fiber Neuropathy Screening List (SFNSL) for SFN diagnosis. METHODS: Fifty-five patients were divided into SFN and mixed fiber damage groups. Relevant scales, nerve conduction studies (NCS) and skin biopsies were performed. Relationships between the intraepidermal nerve fiber density (IENFD) and different scales as well as the diagnostic and cut-off values (score at which Youden's index is largest) were determined...
October 27, 2017: International Journal of Neuroscience
https://www.readbyqxmd.com/read/29052170/the-histopathological-evaluation-of-small-fiber-neuropathy-in-patients-with-vitamin-b12-deficiency
#2
Hafize Nalan Güneş, Can Ebru Bekircan-Kurt, Ersin Tan, Sevim Erdem-Özdamar
Small fiber neuropathy (SFN), due to loss of A-delta and unmyelinated C fibers, is a cause of neuropathic pain. Although the patients with vitamin B12 deficiency are included in SFN studies in the literature, there is no histopathological study investigating the small fiber loss solely in patients with vitamin B12 deficiency. In this pilot study, we aim to demonstrate the intraepidermal nerve fiber density (IENFD) in skin punch biopsy of patients with vitamin B12 deficiency. Ten patients with vitamin B12 deficiency suffering from neuropathic pain and as control group ten patients with vitamin B12 deficiency without neuropathic pain were included...
October 19, 2017: Acta Neurologica Belgica
https://www.readbyqxmd.com/read/28914336/patterns-of-cutaneous-nerve-fibre-loss-and-regeneration-in-type-2-diabetes-with-painful-and-painless-polyneuropathy
#3
Gidon J Bönhof, Alexander Strom, Sonja Püttgen, Bernd Ringel, Jutta Brüggemann, Kálmán Bódis, Karsten Müssig, Julia Szendroedi, Michael Roden, Dan Ziegler
AIMS/HYPOTHESIS: The determinants and mechanisms of the development of diabetic sensorimotor polyneuropathy as a painful (DSPN+p) or painless (DSPN-p) entity remain unclear. We examined the degree of cutaneous nerve fibre loss and regeneration in individuals with type 2 diabetes with DSPN+p or DSPN-p compared with individuals with recent-onset type 2 diabetes and corresponding healthy volunteers. METHODS: In this cross-sectional study, skin biopsies taken from the distal lateral calf were obtained from individuals with recent-onset type 2 diabetes (n = 32) from the German Diabetes Study, with DSPN+p (n = 34) and DSPN-p (n = 32) from the PROPANE study, and volunteers with normal glucose tolerance (n = 50)...
December 2017: Diabetologia
https://www.readbyqxmd.com/read/28894389/quantification-of-small-fiber-pathology-in-patients-with-sarcoidosis-and-chronic-pain-using-cornea-confocal-microscopy-and-skin-biopsies
#4
Linda Cj Oudejans, Marieke Niesters, Michael Brines, Albert Dahan, Monique van Velzen
Small fiber pathology with concomitant chronic neuropathic pain is a common complication of sarcoidosis. The gold standard of diagnosis of small fiber neuropathy (SFN) is the quantification of small nerve fibers in skin biopsies in combination with patient history and psychophysical tests; a new technique is the quantification of small nerve fibers in the cornea using cornea confocal microscopy (CCM). Here, we studied small fiber morphology in sarcoidosis patients with neuropathic pain using skin biopsies, CCM, and quantitative sensory testing (QST)...
2017: Journal of Pain Research
https://www.readbyqxmd.com/read/28884982/comparison-of-somatic-and-sudomotor-nerve-fibers-in-type-2-diabetes-mellitus
#5
Eun Hee Sohn, Kyu Sang Song, Ju Yeon Lee, Ae Young Lee
BACKGROUND AND PURPOSE: The objective of this study was to find a sensitive method for the early detection of diabetic polyneuropathy (DPN) and determine the relationship between the functions of somatic and autonomic small nerve fibers in DPN. METHODS: Patients with type 2 diabetes mellitus and DPN based on clinical symptoms, signs, intraepidermal nerve fiber density (IENFD), and findings in the quantitative sudomotor axon reflex test (QSART) were enrolled retrospectively...
October 2017: Journal of Clinical Neurology
https://www.readbyqxmd.com/read/28820401/intraepidermal-nerve-fiber-density-in-vulvar-lichen-sclerosus-and-normal-vulvar-tissues
#6
K Milian-Ciesielska, L Chmura, G Dyduch, C Jagers, E Radwanska, D Adamek
Lichen sclerosus (LS) is a chronic and inflammatory disease causing sensory symptoms such as itch and pain and affecting most frequently genital skin of women. Intraepidermal nerve fiber density (IENFD) was examined immunohistologically in 20 vulvar skin biopsies of patients affected by LS and in 20 control vulvar skin biopsies, in order to determine if these sensory sensations originate in changes in the epidermal innervation. Obtained results show fewer protein gene product 9.5 (PGP 9.5) positive intraepidermal nerve fibers (IENF) in LS tissues compared to controls (P = 0...
June 2017: Journal of Physiology and Pharmacology: An Official Journal of the Polish Physiological Society
https://www.readbyqxmd.com/read/28815599/the-reduction-of-intraepidermal-p2x3-nerve-fiber-density-correlates-with-behavioral-hyperalgesia-in-a-rat-model-of-nerve-injury-induced-pain
#7
Malik Bechakra, Barthold N Schüttenhelm, Tiziana Pederzani, Pieter A van Doorn, Chris I de Zeeuw, Joost L M Jongen
Skin biopsies from patients with neuropathic pain often show changes in epidermal innervation, although it remains to be elucidated to what extent such changes can be linked to a particular subgroup of nerve fibers and how these changes are correlated with pain intensity. Here, we investigated to what extent behavioral signs of hyperalgesia are correlated with immunohistochemical changes of peptidergic and non-peptidergic epidermal nerve fibers in a rat model of nerve injury-induced pain. Rats subjected to unilateral partial ligation of the sciatic nerve developed significant mechanical and thermal hyperalgesia as tested by the withdrawal responses of the ipsilateral footpad to von Frey hairs and hotplate stimulation...
August 17, 2017: Journal of Comparative Neurology
https://www.readbyqxmd.com/read/28797868/neuropathic-pain-and-nerve-growth-factor-in-chemotherapy-induced-peripheral-neuropathy-prospective-clinical-pathological-study
#8
R Velasco, X Navarro, M Gil-Gil, M Herrando-Grabulosa, A Calls, J Bruna
CONTEXT: Neuropathic pain can be present in patients developing chemotherapy-induced peripheral neuropathy (CIPN). Nerve growth factor (NGF) is trophic to small sensory fibers and regulates nociception. OBJECTIVES: We investigated the changes in serum NGF and intraepidermal nerve fiber density (IENFD) in skin biopsies of cancer patients receiving neurotoxic chemotherapy in a single-center prospective observational study. METHODS: Patients were evaluated before and after chemotherapy administration...
August 7, 2017: Journal of Pain and Symptom Management
https://www.readbyqxmd.com/read/28719619/diagnostic-utility-of-corneal-confocal-microscopy-and-intra-epidermal-nerve-fibre-density-in-diabetic-neuropathy
#9
Uazman Alam, Maria Jeziorska, Ioannis N Petropoulos, Omar Asghar, Hassan Fadavi, Georgios Ponirakis, Andrew Marshall, Mitra Tavakoli, Andrew J M Boulton, Nathan Efron, Rayaz A Malik
OBJECTIVES: Corneal confocal microscopy (CCM) is a rapid, non-invasive, reproducible technique that quantifies small nerve fibres. We have compared the diagnostic capability of CCM against a range of established measures of nerve damage in patients with diabetic neuropathy. METHODS: In this cross sectional study, thirty subjects with Type 1 diabetes without neuropathy (T1DM), thirty one T1DM subjects with neuropathy (DSPN) and twenty seven non-diabetic healthy control subjects underwent detailed assessment of neuropathic symptoms and neurologic deficits, quantitative sensory testing (QST), electrophysiology, skin biopsy and corneal confocal microscopy (CCM)...
2017: PloS One
https://www.readbyqxmd.com/read/28685718/clinical-characteristics-electrophysiology-and-skin-biopsy-of-38-peripheral-neuropathy-cases-with-small-fiber-involvement-of-various-etiologies
#10
Bo Sun, Li-Zhi Liu, Yi-Fan Li, Zhao-Hui Chen, Li Ling, Fei Yang, Fang Cui, Xu-Sheng Huang
BACKGROUND: In small fiber neuropathy (SFN), thinly myelinated Aδ and unmyelinated C fibers are primarily affected, resulting in sensory and/or autonomic symptoms. Various etiologies have been shown to be associated with SFN. This study was aimed to analyze a variety of features in peripheral neuropathy (PN) with small fiber involvement, and to compare disease severity among patients with idiopathic PN, PN associated with impaired glucose tolerance (IGT), and metabolic syndrome (MS) PN...
July 20, 2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/28598015/cutaneous-nerve-biomarkers-in-transthyretin-familial-amyloid-polyneuropathy
#11
Gigi J Ebenezer, Ying Liu, Daniel P Judge, Kelly Cunningham, Shaun Truelove, Noel D Carter, Blessan Sebastian, Kelly Byrnes, Michael Polydefkis
OBJECTIVE: To determine the utility of skin biopsies as a biomarker of disease severity in subjects with amyloid neuropathy. METHODS: Five groups of patients were studied: (1) transthyretin (TTR) familial amyloidotic polyneuropathy (FAP; n = 20), (2) TTR mutation carriers without peripheral neuropathy (TTR-noPN; n = 10), (3) healthy controls (n = 20), (4) diabetic neuropathy disease controls (n = 20), and (5) patients with light-chain (AL) amyloid (n = 2)...
July 2017: Annals of Neurology
https://www.readbyqxmd.com/read/28490654/early-skin-denervation-in-hereditary-and-iatrogenic-transthyretin-amyloid-neuropathy
#12
Teruaki Masuda, Mitsuharu Ueda, Genki Suenaga, Yohei Misumi, Masayoshi Tasaki, Ayane Izaki, Yukako Yanagisawa, Yasuteru Inoue, Hiroaki Motokawa, Sayaka Matsumoto, Mayumi Mizukami, Aiko Arimura, Takahisa Deguchi, Yoshihiko Nishio, Taro Yamashita, Yukihiro Inomata, Konen Obayashi, Yukio Ando
OBJECTIVE: To elucidate early skin denervation in hereditary transthyretin (TTR) amyloidosis and iatrogenic TTR amyloidosis. METHODS: We investigated intraepidermal nerve fiber density (IENFD) and clinical findings in 32 patients with hereditary TTR amyloidosis, 11 asymptomatic mutation carriers, 6 patients with iatrogenic TTR amyloidosis, and 23 healthy volunteers. RESULTS: IENFD values were reduced in patients with the V30M mutation (1.9 ± 2...
June 6, 2017: Neurology
https://www.readbyqxmd.com/read/28462488/an-oral-form-of-methylglyoxal-bis-guanylhydrazone-reduces-monocyte-activation-and-traffic-to-the-dorsal-root-ganglia-in-a-primate-model-of-hiv-peripheral-neuropathy
#13
Jessica R Lakritz, Samshita Yalamanchili, Michael J Polydefkis, Andrew D Miller, Michael S McGrath, Kenneth C Williams, Tricia H Burdo
Peripheral neuropathy (PN) is a major comorbidity of HIV infection that is caused in part by chronic immune activation. HIV-PN is associated with infiltration of monocytes/macrophages to the dorsal root ganglia (DRG) causing neuronal loss and formation of Nageotte nodules. Here, we used an oral form of methylglyoxal-bis-guanylhydrazone (MGBG), a polyamine biosynthesis inhibitor, to specifically reduce activation of myeloid cells. MGBG is selectively taken up by monocyte/macrophages in vitro and inhibits HIV p24 expression and DNA viral integration in macrophages...
August 2017: Journal of Neurovirology
https://www.readbyqxmd.com/read/28131214/quantitative-sensory-testing-and-structural-assessment-of-sensory-nerve-fibres-in-amyotrophic-lateral-sclerosis
#14
Baris Isak, Kirsten Pugdahl, Páll Karlsson, Hatice Tankisi, Nanna Brix Finnerup, Jasna Furtula, Birger Johnsen, Niels Sunde, Johannes Jakobsen, Anders Fuglsang-Frederiksen
OBJECTIVE: In this prospective study, involvement of sensory nerve fibres in ALS patients was assessed using functional and structural measures in the form of quantitative sensory testing (QST) and skin and nerve biopsies. METHODS: Thirty-two ALS patients and 32 healthy subjects were evaluated with a QST battery comprising thresholds of mechanical detection, mechanical pain, vibration detection, cold detection, warm detection, heat pain, and pinprick sensation. Skin biopsies were evaluated in 31 ALS patients by intraepidermal nerve fibre density (IENFD) and axonal swelling ratios, and growth-associated protein 43 (GAP-43) antibody staining...
February 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/27922760/nervecheck-for-the-detection-of-sensory-loss-and-neuropathic-pain-in-diabetes
#15
Georgios Ponirakis, Maria N Odriozola, Samantha Odriozola, Ioannis N Petropoulos, Shazli Azmi, Maryam Ferdousi, Hassan Fadavi, Uazman Alam, Andrew Marshall, Maria Jeziorska, Anthony Miro, Ahmad Kheyami, Mitra Tavakoli, Ahmed Al-Ahmar, Maria B Odriozola, Ariel Odriozola, Rayaz A Malik
BACKGROUND: Accurate and economic detection of nerve damage in diabetes is key to more widespread diagnosis of patients with diabetic peripheral neuropathy (DPN) and painful diabetic neuropathy. This study examined the diagnostic performance of NerveCheck, an inexpensive ($500) quantitative sensory testing (QST) device. METHODS: One hundred forty-four subjects (74 with and 70 without diabetes) underwent assessment with NerveCheck, neuropathy disability score (NDS), nerve conduction studies (NCS), intraepidermal and corneal nerve fiber density (IENFD and CNFD), and McGill questionnaire for neuropathic pain...
December 2016: Diabetes Technology & Therapeutics
https://www.readbyqxmd.com/read/27906877/association-between-small-fiber-neuropathy-and-higher-skin-accumulation-of-advanced-glycation-end-products-in-patients-with-type-1-diabetes
#16
Aleksandra Araszkiewicz, Agnieszka Gandecka, Michał Nowicki, Aleksandra Uruska, Agnieszka Malińska, Katarzyna Kowalska, Bogna Wierusz-Wysocka, Dorota Zozulińska-Ziółkiewicz
INTRODUCTION Advanced glycation end products (AGEs) play a crucial role in the pathogenesis of diabetic peripheral neuropathy (DPN). OBJECTIVES The aim of the study was to assess the skin accumulation of AGEs in patients with long‑lasting type 1 diabetes in relation to the presence of DPN. PATIENTS AND METHODS We evaluated 178 patients with type 1 diabetes (99 men; age, 43 years [interquartile range [IQR], 34-54 years]; disease duration, 25 years [IQR, 18-31 years]). DPN was diagnosed if 2 or more of the following 5 abnormalities were present: symptoms of neuropathy, lack of ankle reflexes, and impaired sensation of touch, temperature, and/or vibration...
November 22, 2016: Polskie Archiwum Medycyny Wewnętrznej
https://www.readbyqxmd.com/read/27756190/comparison-of-sensory-tests-and-neuronal-quantity-of-peripheral-nerves-between-streptozotocin-stz-induced-diabetic-rats-and-paclitaxel-pac-treated-rats
#17
Heung Yong Jin, Na Young Lee, Hyun A Ko, Kyung Ae Lee, Tae Sun Park
Although diabetic peripheral neuropathy (DPN) and chemotherapy-induced peripheral neuropathy (CIPN) are different disease entities, they share similar neuropathic symptoms that impede quality of life for these patients. Despite having very similar downstream effects, there have been no direct comparisons between DPN and CIPN with respect to symptom severity and therapeutic responses. We compared peripheral nerve damage due to hyperglycemia with that caused by paclitaxel (PAC) treatment as represented by biochemical parameters, diverse sensory tests, and immunohistochemistry of cutaneous and sciatic nerves...
September 2016: Somatosensory & Motor Research
https://www.readbyqxmd.com/read/27660061/small-fiber-neuropathy-in-children-two-case-reports-illustrating-the-importance-of-recognition
#18
Janneke G J Hoeijmakers, Catharina G Faber, Carien J Miedema, Ingemar S J Merkies, Johan S H Vles
Small fiber neuropathy (SFN) is a debilitating condition that often leads to pain and autonomic dysfunction. In the last few decades, SFN has been gaining more attention, particularly in adults. However, literature about SFN in children remains limited. The present article reports the cases of 2 adolescent girls diagnosed with SFN. The first patient (14 years of age) complained about painful itch and tingling in her legs, as well as dysautonomia symptoms for years. She also reported a red/purple-type discoloration of her legs aggravated by warmth and standing, compatible with erythromelalgia...
October 2016: Pediatrics
https://www.readbyqxmd.com/read/27601446/early-detection-of-diabetic-neuropathy-by-investigating-cnfl-and-ienfd-in-thy1-yfp-mice
#19
COMPARATIVE STUDY
Janine Leckelt, Pedro Guimarães, Annett Kott, Alfredo Ruggeri, Oliver Stachs, Simone Baltrusch
Small fiber neuropathy is one of the most common and painful long-term complications of diabetes mellitus. Examination of the sub-basal corneal nerve plexus is a promising surrogate marker of diabetic neuropathy. To investigate the efficacy, reliability and reproducibility of in vivo corneal confocal microscopy (IVCCM), we used thy1-YFP mice, which express yellow fluorescence protein (YFP) in nerve fibers. 4 weeks after multiple low-dose injections of streptozotocin, thy1-YFP mice showed manifest diabetes. Subsequent application of insulin-releasing pellets for 8 weeks resulted in a significant reduction of blood glucose concentration and HbA1c, a significant increase in body weight and no further increase in advanced glycation end products (AGEs)...
November 2016: Journal of Endocrinology
https://www.readbyqxmd.com/read/27417167/activity-for-diabetic-polyneuropathy-adapt-study-design-and-protocol-for-a-2-site-randomized-controlled-trial
#20
RANDOMIZED CONTROLLED TRIAL
Patricia M Kluding, J Robinson Singleton, Mamatha Pasnoor, Mazen M Dimachkie, Richard J Barohn, A Gordon Smith, Robin L Marcus
Background: Half of all patients with diabetes develop diabetic peripheral neuropathy (DPN), a complication leading to reduced mobility and quality of life. Although there are no proven pharmacologic approaches to reduce DPN risk or slow its progression, evidence suggests that physical activity may improve symptoms and enhance peripheral nerve regeneration. Objective: The aim of the study will be to determine the impact of an intense lifestyle intervention on neuropathy progression and quality of life in individuals with DPN...
January 1, 2017: Physical Therapy
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