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Neuropathy investigation

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https://www.readbyqxmd.com/read/28650878/leber-hereditary-optic-neuropathy-bridging-the-translational-gap
#1
Neringa Jurkute, Patrick Yu-Wai-Man
PURPOSE OF REVIEW: Leber hereditary optic neuropathy (LHON) is the most common primary mitochondrial DNA (mtDNA) genetic disorder in the population. We address the clinical evolution of the disease, the secondary etiological factors that could contribute to visual loss, and the challenging task of developing effective treatments. RECENT FINDINGS: LHON is characterized by a preclinical phase that reflects retinal ganglion cell (RGC) dysfunction before rapid visual deterioration ensues...
June 24, 2017: Current Opinion in Ophthalmology
https://www.readbyqxmd.com/read/28649767/the-use-of-antioxidant-agents-for-chemotherapy-induced-peripheral-neuropathy-treatment-in-animal-models
#2
REVIEW
Larissa Feitosa Carvalho, Ana Maria Fantini Silva, Adriana Andrade Carvalho
Antineoplastic drugs such as Cisplatin, Oxaliplatin, Paclitaxel and Vincristin are widely used in the treatment for several both solid and blood tumours. However, the severity of peripheral neuropathy caused by these agents can affect the patient's quality of life. The major symptoms of Chemotherapy-Induced Peripheral Neuropathy (CIPN) involve: sensory loss, paresthesia, dysesthaesia, numbness, tingling, temperature sensitivity, allodynia and hyperalgesia, in a "stocking and glove" distribution. Why many different chemotherapeutic agents result in similar neuropathy profiles is unclear...
June 26, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/28645005/application-of-stem-cell-derived-neuronal-cells-to-evaluate-neurotoxic-chemotherapy
#3
Claudia Wing, Masaaki Komatsu, Shannon M Delaney, Matthew Krause, Heather E Wheeler, M Eileen Dolan
The generation of induced pluripotent stem cells (iPSCs) and differentiation to cells composing major organs has opened up the possibility for a new model system to study adverse toxicities associated with chemotherapy. Therefore, we used human iPSC-derived neurons to study peripheral neuropathy, one of the most common adverse effects of chemotherapy and cause for dose reduction. To determine the utility of these neurons in investigating the effects of neurotoxic chemotherapy, we measured morphological differences in neurite outgrowth, cell viability as determined by ATP levels and apoptosis through measures of caspase 3/7 activation following treatment with clinically relevant concentrations of platinating agents (cisplatin, oxaliplatin and carboplatin), taxanes (paclitaxel, docetaxel and nab-paclitaxel), a targeted proteasome inhibitor (bortezomib), an antiangiogenic compound (thalidomide), and 5-fluorouracil, a chemotherapeutic that does not cause neuropathy...
June 15, 2017: Stem Cell Research
https://www.readbyqxmd.com/read/28644075/spine-stereotactic-radiosurgery-for-metastatic-sarcoma-patterns-of-failure-and-radiation-treatment-volume-considerations
#4
Andrew J Bishop, Randa Tao, B Ashleigh Guadagnolo, Pamela K Allen, Neal C Rebueno, Xin A Wang, Behrang Amini, Claudio E Tatsui, Laurence D Rhines, Jing Li, Eric L Chang, Paul D Brown, Amol J Ghia
OBJECTIVE Given the relatively lower radiosensitivity of sarcomas and the locally infiltrative patterns of spread, the authors sought to investigate spine stereotactic radiosurgery (SSRS) outcomes for metastatic sarcomas and to analyze patterns of failure. METHODS The records of 48 patients with 66 sarcoma spinal metastases consecutively treated with SSRS between 2002 and 2013 were reviewed. The Kaplan-Meier method was used to estimate rates of overall survival (OS) and local control (LC). Local recurrences were categorized as occurring infield (within the 95% isodose line [IDL]), marginally (between the 20% and 95% IDLs), or out of field...
June 23, 2017: Journal of Neurosurgery. Spine
https://www.readbyqxmd.com/read/28638341/herbal-medicine-ac591-prevents-oxaliplatin-induced-peripheral-neuropathy-in-animal-model-and-cancer-patients
#5
Xiaolan Cheng, Jiege Huo, Dawei Wang, Xueting Cai, Xiaoyan Sun, Wuguang Lu, Yang Yang, Chunping Hu, Xiaoning Wang, Peng Cao
Oxaliplatin is clinically compelling because of severe peripheral neuropathy. The side effect can result in dosage reductions or even cessation of chemotherapy, and no effective treatments are available. AC591 is a standardized extract of Huangqi Guizhi Wuwu decoction, an herbal formula recorded in "Synopsis of the Golden Chamber" for improving limb numbness and pain. In this study, we investigated whether AC591 could protect against oxaliplatin-induced peripheral neuropathy. To clarify it, a rat model of oxaliplatin-induced peripheral neuropathy was established, and neuroprotective effect of AC591 was studied...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28636650/the-formation-of-lipid-droplets-favors-intracellular-mycobacterium-leprae-survival-in-sw-10-non-myelinating-schwann-cells
#6
Song-Hyo Jin, Sung-Kwan An, Seong-Beom Lee
Leprosy is a chronic infectious disease that is caused by the obligate intracellular pathogen Mycobacterium leprae (M.leprae), which is the leading cause of all non-traumatic peripheral neuropathies worldwide. Although both myelinating and non-myelinating Schwann cells are infected by M.leprae in patients with lepromatous leprosy, M.leprae preferentially invades the non-myelinating Schwann cells. However, the effect of M.leprae infection on non-myelinating Schwann cells has not been elucidated. Lipid droplets (LDs) are found in M...
June 21, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28634676/evaluation-of-the-psychometric-properties-of-the-eortc-chemotherapy-induced-peripheral-neuropathy-questionnaire-qlq-cipn20
#7
Jacobien M Kieffer, Tjeerd J Postma, Lonneke van de Poll-Franse, Floortje Mols, Jan J Heimans, Guido Cavaletti, Neil K Aaronson
PURPOSE: To investigate the scale structure and psychometrics of the EORTC chemotherapy-induced peripheral neuropathy module (QLQ-CIPN20). METHODS: Using confirmatory factor analyses (CFA), we tested two hypothesized scale structure models of the QLQ-CIPN20 in 473 patients with non-small cell lung cancer, 281 patients with heterogeneous cancer diagnoses, and 500 patients with colorectal cancer. We also modeled the two hypothesized models as bi-factor models. These included a general factor, in addition to the specific domain factors...
June 20, 2017: Quality of Life Research
https://www.readbyqxmd.com/read/28632028/the-effect-of-combined-systemic-erythropoietin-and-steroid-on-non-arteritic-anterior-ischemic-optic-neuropathy-a-prospective-study
#8
Mohammad Pakravan, Hamed Esfandiari, Kiana Hassanpour, Sarvnaz Razavi, Parastou Pakravan
BACKGROUND: To investigate the effect of combined intravenous (IV) erythropoietin (EPO) and corticosteroid as well as systemic steroid alone for the treatment of non-arteritic anterior ischemic optic neuropathy (NAION). METHODS: In this prospective interventional comparative case series, 113 consecutive patients diagnosed with recent onset (less than 14 days) NAION were included. Patients were categorized into three groups. 40 patients received systemic IV corticosteroid combined with recombinant human erythropoietin (rhEPO) (group 1), 43 patients received systemic corticosteroid alone (group 2), and 30 patients were enrolled as the control group (group 3)...
February 26, 2017: Current Eye Research
https://www.readbyqxmd.com/read/28625567/dose-postural-control-improve-following-application-of-transcutaneous-electrical-nerve-stimulation-in-diabetic-peripheral-neuropathic-patients-a-randomized-placebo-control-trial
#9
Z Saadat, Z Rojhani-Shirazi, L Abbasi
BACKGROUND: peripheral neuropathy is the most common problem of diabetes. Neuropathy leads to lower extremity somatosensory deficits and postural instability in these patients. However, there are not sufficient evidences for improving postural control in these patients. AIM: To investigate the effects of transcutaneous electrical nerve stimulation (TENS) on postural control in patients with diabetic neuropathy. METHODS: Twenty eighth patients with diabetic neuropathy (40-55 Y/O) participated in this RCT study...
June 9, 2017: Diabetes & Metabolic Syndrome
https://www.readbyqxmd.com/read/28623566/clinical-and-molecular-genetic-features-of-cerebrotendinous-xanthomatosis-patients-in-chinese-families
#10
Chen Chen, Yue Zhang, Hui Wu, Yi-Min Sun, Ye-Hua Cai, Jian-Jun Wu, Jian Wang, Ling-Yun Gong, Zheng-Tong Ding
Cerebrotendinous xanthomatosis (CTX) is a lipid-storage disease caused by mutations in CYP27A1. Current publications of Chinese CTX were mainly based on case reports. Here we investigated the clinical manifestations, genetic features in Chinese CTX patients. The clinical materials of 4 Chinese CTX pedigrees were collected. The genetic testing was done by polymerase chain reaction plus Sanger sequencing. The features of Chinese CTX patients reported previously were also reviewed. Three novel mutations of p.Arg513Cys, c...
June 17, 2017: Metabolic Brain Disease
https://www.readbyqxmd.com/read/28618325/early-short-term-intensive-multidisciplinary-diabetes-care-a-ten-year-follow-up-of-outcomes
#11
Zhong Zhi Shen, Yu Yao Huang, Ching Jung Hsieh
OBJECTIVES: To evaluate the outcome of an early short-term intensive diabetic care program followed by a regular out-patient shared-care education program. METHODS: We retrospectively reviewed the medical charts of 196 patients newly diagnosed with type 2 diabetes mellitus (DM) who were admitted to the hospital for intensive multidisciplinary interventions. For comparison, we also enrolled 206 patients with type 2 DM newly diagnosed but not receiving short-term intensive program...
June 2, 2017: Diabetes Research and Clinical Practice
https://www.readbyqxmd.com/read/28617998/schwann-cell-specific-deletion-of-the-endosomal-pi-3-kinase-vps34-leads-to-delayed-radial-sorting-of-axons-arrested-myelination-and-abnormal-erbb2-erbb3-tyrosine-kinase-signaling
#12
Anne M Logan, Anna E Mammel, Danielle C Robinson, Andrea L Chin, Alec F Condon, Fred L Robinson
The PI 3-kinase Vps34 (Pik3c3) synthesizes phosphatidylinositol 3-phosphate (PI3P), a lipid critical for both endosomal membrane traffic and macroautophagy. Human genetics have implicated PI3P dysregulation, and endosomal trafficking in general, as a recurring cause of demyelinating Charcot-Marie-Tooth (CMT) peripheral neuropathy. Here, we investigated the role of Vps34, and PI3P, in mouse Schwann cells by selectively deleting Vps34 in this cell type. Vps34-Schwann cell knockout (Vps34(SCKO) ) mice show severe hypomyelination in peripheral nerves...
June 15, 2017: Glia
https://www.readbyqxmd.com/read/28615513/thioredoxin-plays-a-key-role-in-retinal-neuropathy-prior-to-endothelial-damage-in-diabetic-mice
#13
Xiang Ren, Chen Li, Junli Liu, Chenghong Zhang, Yuzhen Fu, Nina Wang, Haiying Ma, Heyuan Lu, Hui Kong, Li Kong
Diabetes is a chronic metabolic syndrome that results in changes in carbohydrate, lipid and protein metabolism. With diabetes for a long time, it increases the risk of diabetic retinopathy (DR) and long-term morbidity and mortality. Moreover, emerging evidence suggests that neuron damage occurs earlier than microvascular complications in DR patients, but the underlying mechanism is unclear. We investigated diabetes-induced retinal neuropathy and elucidated key molecular events to identify new therapeutic targets for the clinical treatment and prevention of DR...
May 24, 2017: Oncotarget
https://www.readbyqxmd.com/read/28614534/peripheral-polyneuropathy-in-severely-obese-patients-with-metabolic-syndrome-but-without-diabetes-association-with-low-hdl-cholesterol
#14
Otto Henrique Nienov, Luciana Matte, Lisiane Stefani Dias, Helena Schmid
Introduction: The purpose of this study was to evaluate the prevalence of peripheral polyneuropathy (PPN) in subjects with grade II and III obesity (Ob-II,III) and metabolic syndrome (MetS) but without diabetes and to investigate possible associated factors. Method: A cross-sectional study was performed in non-diabetic Ob-II,III,MetS patients using the Michigan Neuropathy Screening Instrument (MNSI) to assess the presence of PPN. Results: A total of 24 of 218 non-diabetic Ob-II,III,MetS patients had PPN...
April 2017: Revista da Associação Médica Brasileira
https://www.readbyqxmd.com/read/28614189/a-dose-response-study-of-topical-allyl-isothiocyanate-mustard-oil-as-human-surrogate-model-of-pain-hyperalgesia-and-neurogenic-inflammation
#15
H H Andersen, S Lo Vecchio, P Gazerani, L Arendt-Nielsen
Despite being a ubiquitous animal pain model, the natural TRPA1-agonist allyl-isothiocyanate (AITC, also known as "mustard oil") has only been sparsely investigated as a potential human surrogate model of pain, sensitization, and neurogenic inflammation. Its dose-response as an algogenic, sensitizing irritant remains to be elucidated in human skin. Three concentrations of AITC (10%, 50%, 90%) and vehicle (paraffin) were applied for 5 min to 3x3 cm areas on the volar forearms in 14 healthy volunteers, and evoked pain intensity (visual analog scale 0-100 mm) and pain quality were assessed...
June 9, 2017: Pain
https://www.readbyqxmd.com/read/28600132/brentuximab-vedotin-or-physician-s-choice-in-cd30-positive-cutaneous-t-cell-lymphoma-alcanza-an-international-open-label-randomised-phase-3-multicentre-trial
#16
H Miles Prince, Youn H Kim, Steven M Horwitz, Reinhard Dummer, Julia Scarisbrick, Pietro Quaglino, Pier Luigi Zinzani, Pascal Wolter, Jose A Sanches, Pablo L Ortiz-Romero, Oleg E Akilov, Larisa Geskin, Judith Trotman, Kerry Taylor, Stephane Dalle, Michael Weichenthal, Jan Walewski, David Fisher, Brigitte Dréno, Rudolf Stadler, Tatyana Feldman, Timothy M Kuzel, Yinghui Wang, Maria Corinna Palanca-Wessels, Erin Zagadailov, William L Trepicchio, Wenwen Zhang, Hui-Min Lin, Yi Liu, Dirk Huebner, Meredith Little, Sean Whittaker, Madeleine Duvic
BACKGROUND: Cutaneous T-cell lymphomas are rare, generally incurable, and associated with reduced quality of life. Present systemic therapies rarely provide reliable and durable responses. We aimed to assess efficacy and safety of brentuximab vedotin versus conventional therapy for previously treated patients with CD30-positive cutaneous T-cell lymphomas. METHODS: In this international, open-label, randomised, phase 3, multicentre trial, we enrolled adult patients with CD30-positive mycosis fungoides or primary cutaneous anaplastic large-cell lymphoma who had been previously treated...
June 6, 2017: Lancet
https://www.readbyqxmd.com/read/28598042/peripheral-vascular-disease-in-patients-with-diabetic-foot-ulcers-an-emerging-trend-a-prospective-study-from-north-india
#17
Supriya Bajaj, Amit Mahajan, Sumit Grover, Vijay Mahajan, Pankaj Goyal, Vikram Kumar Gupta
BACKGROUND: Diabetic foot ulcer is one of the chronic complications of diabetes mellitus (DM) with 25% of patients with diabetes developing a foot ulcer during their lifetime leading to amputation. Diabetic foot is classified into 2 main types: neuropathic ulcers (NPU) and neuro-ischemic ulcer (NIU) where in addition to neuropathy peripheral vascular disease (PVD) is also present. AIMS: We aimed to a) assess the prevalence of Peripheral vascular disease (PVD) in patients of type 2 diabetes mellitus (T2DM) presenting with New Diabetic Foot ulcers (DFU)...
May 2017: Journal of the Association of Physicians of India
https://www.readbyqxmd.com/read/28595477/positive-effects-of-plantar-vibration-training-for-the-treatment-of-diabetic-peripheral-neuropathy-a-pilot-study
#18
Katerina Stambolieva, Dorina Petrova, Mariya Irikeva
PURPOSE: To evaluate the effectiveness of 8-week low-frequency plantar vibration training on patients with sensorimotor diabetic peripheral neuropathy (DPN). PARTICIPANTS: Twelve patients took part in the investigation. RESULTS: An increase of the nerve conductive velocity of soral and peroneal nerves of feet, increased postural stability, and disappearance of the pain and tingling were observed. CONCLUSION: The obtained results provide evidence for beneficial effects of 8-week plantar vibration training in patients with DPN...
June 9, 2017: Somatosensory & Motor Research
https://www.readbyqxmd.com/read/28595321/mitochondrial-deficits-and-abnormal-mitochondrial-retrograde-axonal-transport-play-a-role-in-the-pathogenesis-of-mutant-hsp27-induced-charcot-marie-tooth-disease
#19
Bernadett Kalmar, Amy Innes, Klaus Wanisch, Alicia Koyen Kolaszynska, Amelie Pandraud, Gavin Kelly, Andrey Y Abramov, Mary M Reilly, Giampietro Schiavo, Linda Greensmith
Mutations in the small heat shock protein Hsp27, encoded by the HSPB1 gene, have been shown to cause Charcot Marie Tooth Disease type 2 (CMT-2) or distal hereditary motor neuropathy (dHMN). Protein aggregation and axonal transport deficits have been implicated in the disease. In this study, we conducted analysis of bidirectional movements of mitochondria in primary motor neuron axons expressing wild type and mutant Hsp27. We found significantly slower retrograde transport of mitochondria in Ser135Phe, Pro39Leu and Arg140Gly mutant Hsp27 expressing motor neurons than in wild type Hsp27 neurons, although anterograde movement velocities remained normal...
June 8, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/28593000/ultrasound-and-emg-ncv-study-electromyography-and-nerve-conduction-velocity-correlation-in-diagnosis-of-nerve-pathologies
#20
REVIEW
Shilpa Domkundwar, Gayatri Autkar, S V Khadilkar, Mayur Virarkar
PURPOSE: Nerve disorders are commonly encountered in clinical practice. Ultrasonography (USG) is a useful modality in the evaluation of most of the peripheral and superficial pathologies amenable to penetration by ultrasound. The primary objective is to study the USG findings of various peripheral nerve pathologies and to correlate them with electrophysiological (EMG-NCV) findings. METHOD: 42 patients referred with suspicion of peripheral nervous system affection were evaluated with USG along with EMG-NCV...
June 2017: Journal of Ultrasound
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