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https://www.readbyqxmd.com/read/28322157/diabetes-related-neurological-implications-and-pharmacogenomics
#1
Rojas Carranza Camilo Andrés, Bustos Cruz Rosa Helena, Pino Pinzón Carmen Juliana, Ariza Marquez Yeimy Viviana, Gómez Bello Rosa Margarita, Cañadas Garre Marisa
Diabetes mellitus (DM) is the most commonly occurring cause of neuropathy around the world and is beginning to grow in countries where there is a risk of obesity. DM Type II, (T2DM) is a common age-related disease and is a major health concern, particularly in developed countries in Europe where the population is aging. T2DM is a chronic disease which is characterised by hyperglycemia, hyperinsulinemia and insulin resistance, together with the body's inability to use glucose as energy. Such metabolic disorder produces a chronic inflammatory state, as well as changes in lipid metabolism leading to hypertriglyceridemia, thereby producing chronic deterioration of the organs and premature morbidity and mortality...
March 17, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28300644/the-connective-tissue-phenotype-of-glaucomatous-cupping-in-the-monkey-eye-clinical-and-research-implications
#2
REVIEW
Hongli Yang, Juan Reynaud, Howard Lockwood, Galen Williams, Christy Hardin, Luke Reyes, Cheri Stowell, Stuart K Gardiner, Claude F Burgoyne
In a series of previous publications we have proposed a framework for conceptualizing the optic nerve head (ONH) as a biomechanical structure. That framework proposes important roles for intraocular pressure (IOP), IOP-related stress and strain, cerebrospinal fluid pressure (CSFp), systemic and ocular determinants of blood flow, inflammation, auto-immunity, genetics, and other non-IOP related risk factors in the physiology of ONH aging and the pathophysiology of glaucomatous damage to the ONH. The present report summarizes 20 years of technique development and study results pertinent to the characterization of ONH connective tissue deformation and remodeling in the unilateral monkey experimental glaucoma (EG) model...
March 12, 2017: Progress in Retinal and Eye Research
https://www.readbyqxmd.com/read/28299330/erythropoietin-modification-enhances-the-protection-of-mesenchymal-stem-cells-on-diabetic-rat-derived-schwann-cells-implications-for-diabetic-neuropathy
#3
Shuyun Zhang, Baolin Shi
Diabetes-triggered apoptosis of Schwann cells (SC) contributes to the degradation of diabetic peripheral neuropathy (DNP). In recent years, mesenchymal stem cells (MSC) were applied to DPN repair and it was demonstrated that paracrine secretion played a key role in neuroprotection exerted by MSC. Erythropoietin (EPO) is a potent cytokine capable of reducing apoptosis of SC. However, the expression of EPO in MSC is limited. In this study, we hypothesized that overexpression of EPO in MSC (EPO-MSC) may significantly improve their neuroprotective potentials...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28286483/long-term-effects-pathophysiological-mechanisms-and-risk-factors-of-chemotherapy-induced-peripheral-neuropathies-a-comprehensive-literature-review
#4
REVIEW
Nicolas Kerckhove, Aurore Collin, Sakahlé Condé, Carine Chaleteix, Denis Pezet, David Balayssac
Neurotoxic anticancer drugs, such as platinum-based anticancer drugs, taxanes, vinca alkaloids, and proteasome/angiogenesis inhibitors are responsible for chemotherapy-induced peripheral neuropathy (CIPN). The health consequences of CIPN remain worrying as it is associated with several comorbidities and affects a specific population of patients already impacted by cancer, a strong driver for declines in older adults. The purpose of this review is to present a comprehensive overview of the long-term effects of CIPN in cancer patients and survivors...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28286117/carvedilol-prevents-functional-deficits-in-peripheral-nerve-mitochondria-of-rats-with-oxaliplatin-evoked-painful-peripheral-neuropathy
#5
Aparna Areti, Prashanth Komirishetty, Ashutosh Kumar
Oxaliplatin use as chemotherapeutic agent is frequently limited by cumulative neurotoxicity which may compromise quality of life. Reports relate this neurotoxic effect to oxidative stress and mitochondrial dysfunction in peripheral nerves and dorsal root ganglion (DRG). Carvedilol is an antihypertensive drug, has also been appreciated for its antioxidant and mitoprotective properties. Carvedilol co-treatment did not reduce the anti-tumor effects of oxaliplatin in human colon cancer cells (HT-29), but exhibited free radical scavenging activity against oxaliplatin-induced oxidative stress in neuronal cells (Neuro-2a)...
March 9, 2017: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/28208696/valproate-attenuates-endoplasmic-reticulum-stress-induced-apoptosis-in-sh-sy5y-cells-via-the-akt-gsk3%C3%AE-signaling-pathway
#6
Zhengmao Li, Fenzan Wu, Xie Zhang, Yi Chai, Daqing Chen, Yuetao Yang, Kebin Xu, Jiayu Yin, Rui Li, Hongxue Shi, Zhouguang Wang, Xiaokun Li, Jian Xiao, Hongyu Zhang
Endoplasmic reticulum (ER) stress-induced apoptosis plays an important role in a range of neurological disorders, such as neurodegenerative diseases, spinal cord injury, and diabetic neuropathy. Valproate (VPA), a typical antiepileptic drug, is commonly used in the treatment of bipolar disorder and epilepsy. Recently, VPA has been reported to exert neurotrophic effects and promote neurite outgrowth, but its molecular mechanism is still unclear. In the present study, we investigated whether VPA inhibited ER stress and promoted neuroprotection and neuronal restoration in SH-SY5Y cells and in primary rat cortical neurons, respectively, upon exposure to thapsigargin (TG)...
February 8, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27921431/-short-term-and-long-term-glycemic-variability-and-its-relationship-to-microvascular-complications-of-diabetes
#7
Martin Prázný, Jan Škrha, Jan Šoupal, Jan Škrha
Vascular complications of diabetes result from long lasting unsatisfactory glycemic control. We usually assess glycemic control based on the value of glycated hemoglobin HbA1c. The glycated hemoglobin test, however, says nothing about short-term glycemic fluctuations. Recently, continuous monitoring of glycemia has enabled us an in-depth assessment of changes in glucose concentrations, called glycemic variability. In connection with the research into short-term glycemic variability, also the study of long-term fluctuations in glycemic control based on HbA1c variability has now intensified...
2016: Vnitr̆ní Lékar̆ství
https://www.readbyqxmd.com/read/27917671/-the-role-of-oxidative-stress-in-the-development-of-diabetic-neuropathy
#8
Ferenc Sztanek, Ágnes Molnárné Molnár, Zoltán Balogh
Diabetic neuropathy may be one of the most common and severe complications of diabetes mellitus. Oxidative stress plays a pivotal role in the development of microvascular complications of diabetes. The majority of related pathways like polyol and hexosamine, advanced glycation end products, poly-ADP-ribose polymerase, and protein kinase-C all originated from initial oxidative stress. In this review, the authors present the current oxidative stress hypothesis in diabetes mellitus and summarize the pathophysiological mechanisms of diabetic neuropathy associated with increased oxidative stress...
December 2016: Orvosi Hetilap
https://www.readbyqxmd.com/read/27906945/ganglion-cyst-at-the-proximal-tibiofibular-joint-in-a-patient-with-painless-foot-drop
#9
Abdulmuhsen Alsahhaf, Waleed Renno
Entrapment neuropathies of the fibular nerve and its branches are often underdiagnosed due to the lack of reliable diagnosis using clinical examination and electrophysiologic evaluation. Most fibular nerve compressions may be classified into 2 broad categories: (a) mechanical causes, which occur at fibrous or fibro-osseous tunnels, and (b) dynamic causes related to nerve injury during specific limb positioning. Foot drop resulting from weakness of the dorsiflexor muscles of the foot is a relatively uncommon presentation and closely related to L5 neuropathy caused by a disc herniation...
November 2016: Pain Physician
https://www.readbyqxmd.com/read/27855625/therapeutic-potential-of-caffeic-acid-phenethyl-ester-cape-in-diabetes
#10
Valeria Pittala, Loredana Salerno, Giuseppe Romeo, Rosaria Acquaviva, Claudia Di Giacomo, Valeria Sorrenti
Diabetes mellitus is a complex metabolic disease characterized by high blood sugar levels. Different pathogenic processes are involved in the etiology of the disease. Indeed, chronic diabetes hyperglycemia is often associated with severe long-term complications including cardiovascular symptoms, retinopathy, nephropathy, and neuropathy. Although the precise molecular mechanisms underlying diabetes are not yet clear, it is widely accepted that increased levels of oxidative stress are involved in the onset, development and progression of diabetes and its related complications...
November 18, 2016: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/27834877/sugar-composition-analysis-of-fuzi-polysaccharides-by-hplc-ms-n-and-their-protective-effects-on-schwann-cells-exposed-to-high-glucose
#11
Bei-Bei Wang, Jia-Li Wang, Jiang Yuan, Qing-Hua Quan, Rui-Fang Ji, Peng Tan, Jing Han, Yong-Gang Liu
Fuzi has been used to treat diabetic complications for many years in china. In a previous study, we have shown that Fuzi aqueous extract can attenuate Diabetic peripheral neuropathy (DPN) in rats and protect Schwann cells from injury. Thus, the protective effect of Fuzi polysaccharides (FPS) on high glucose-induced SCs and the preliminary mechanism were investigated. Firstly, the FPS were obtained and their monose composition was analyzed by the combination of pre-column derivatization and high performance liquid chromatography coupled with electrospray ionization multi-tandem mass spectrometry (HPLC/ESI-MS(n))...
November 9, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/27830156/administration-of-traditional-chinese-blood-circulation-activating-drugs-for-microvascular-complications-in-patients-with-type-2-diabetes-mellitus
#12
REVIEW
Lisha He, Han Wang, Chengjuan Gu, Xinhui He, Linhua Zhao, Xiaolin Tong
Traditional Chinese medicine (TCM) is an important complementary strategy for treating diabetes mellitus (DM) in China. Traditional Chinese blood circulation activating drugs are intended to guide an overall approach to the prevention and treatment of microvascular complications of DM. The core mechanism is related to the protection of the vascular endothelium and the basement membrane. Here, we reviewed the scientific evidence underpinning the use of blood circulation activating drugs to prevent and treat DM-induced microvascular complications, including diabetic nephropathy (DN), diabetic peripheral neuropathy (DPN), and diabetic retinopathy (DR)...
2016: Journal of Diabetes Research
https://www.readbyqxmd.com/read/27807175/ablation-of-perk-in-schwann-cells-improves-myelination-in-the-s63del-charcot-marie-tooth-1b-mouse
#13
Mariapaola Sidoli, Nicolò Musner, Nicholas Silvestri, Daniela Ungaro, Maurizio D'Antonio, Douglas R Cavener, M Laura Feltri, Lawrence Wrabetz
In factory cells, the accumulation of misfolded protein provokes the unfolded protein response (UPR). For example, deletion of serine 63 (S63del) in myelin protein zero (P0) induces P0 accumulation in the endoplasmic reticulum (ER) of Schwann cells and a persistent UPR associated with Charcot-Marie-Tooth 1B (CMT1B) demyelinating peripheral neuropathy in human and mouse. PERK (protein kinase RNA-like ER kinase) is the ER stress sensor that attenuates global translation by phosphorylating eIF2α. Inhibition of the eIF2α holophosphatase GADD34:PP1, increases the phosphorylation of eIF2α in Schwann cells and largely rescues S63del neuropathy...
November 2, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27742903/levels-of-heavy-and-essential-trace-metals-and-their-correlation-with-antioxidant-and-health-status-in-individuals-occupationally-exposed-to-municipal-solid-wastes
#14
Adesina O Odewabi, Martins Ekor
Recent studies have indicated an increased incidence of toxic neuropathies among waste management workers (WMW) possibly linked to increased detection of heavy metals in municipal solid wastes. The present study evaluated serum levels of some heavy and essential trace metals in relation to oxidant/antioxidant status of WMW. One hundred and twenty-six WMW and 84 non-WMW (control) were recruited. Metal/element concentration was measured by atomic absorption spectrophotometry and oxidant/antioxidant markers were determined using standard procedures...
October 13, 2016: Toxicology and Industrial Health
https://www.readbyqxmd.com/read/27712995/combination-strategy-of-parp-inhibitor-with-antioxidant-prevent-bioenergetic-deficits-and-inflammatory-changes-in-cci-induced-neuropathy
#15
Prashanth Komirishetty, Aparna Areti, Ranadeep Gogoi, Ramakrishna Sistla, Ashutosh Kumar
Neuropathic pain, a debilitating pain condition and the underlying pathogenic mechanisms are complex and interwoven amongst each other and still there is scant information available regarding therapies which promise to treat the condition. Evidence indicate that oxidative/nitrosative stress induced poly (ADP-ribose) polymerase (PARP) overactivation initiate neuroinflammation and bioenergetic crisis culminating into neurodegenerative changes following nerve injury. Hence, we investigated the therapeutic effect of combining an antioxidant, quercetin and a PARP inhibitor, 4-amino 1, 8-naphthalimide (4-ANI) on the hallmark deficits induced by chronic constriction injury (CCI) of sciatic nerve in rats...
February 2017: Neuropharmacology
https://www.readbyqxmd.com/read/27697454/nerve-stress-during-reverse-total-shoulder-arthroplasty-a-cadaveric-study
#16
Hubert Lenoir, Louis Dagneaux, François Canovas, Thomas Waitzenegger, Thuy Trang Pham, Michel Chammas
BACKGROUND: Neurologic lesions are relatively common after total shoulder arthroplasty. These injuries are mostly due to traction. We aimed to identify the arm manipulations and steps during reverse total shoulder arthroplasty (RTSA) that affect nerve stress. METHODS: Stress was measured in 10 shoulders of 5 cadavers by use of a tensiometer on each nerve from the brachial plexus, with shoulders in different arm positions and during different surgical steps of RTSA...
February 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/27642327/the-aqueous-extract-of-portulaca-oleracea-ameliorates-neurobehavioral-dysfunction-and-hyperglycemia-related-to-streptozotocin-diabetes-induced-in-ovariectomized-rats
#17
Seyed Reza Fatemi Tabatabaei, Masome Rashno, Shahab Ghaderi, Majid Askaripour
Diabetes mellitus is one of the most common causes of neuropathy. Although antioxidant and antidiabetic effects of the aqueous extract of purslane (Portulaca oleracea) (AEOP) have been demonstrated before by other researchers, we did not find any study that assessed the psychobiological effects of AEOP in diabetes induced animals. Thirty ovariectomized (OVX) female Wistar rats were randomly divided into 3 groups of control, Dia and Dia+AEOP. The latter group was orally treated by 300 mg/kg of AEOP for 35 days...
2016: Iranian Journal of Pharmaceutical Research: IJPR
https://www.readbyqxmd.com/read/27633772/the-metabolomic-signature-of-leber-s-hereditary-optic-neuropathy-reveals-endoplasmic-reticulum-stress
#18
Juan Manuel Chao de la Barca, Gilles Simard, Patrizia Amati-Bonneau, Zainab Safiedeen, Delphine Prunier-Mirebeau, Stéphanie Chupin, Cédric Gadras, Lydie Tessier, Naïg Gueguen, Arnaud Chevrollier, Valérie Desquiret-Dumas, Marc Ferré, Céline Bris, Judith Kouassi Nzoughet, Cinzia Bocca, Stéphanie Leruez, Christophe Verny, Dan Miléa, Dominique Bonneau, Guy Lenaers, M Carmen Martinez, Vincent Procaccio, Pascal Reynier
Leber's hereditary optic neuropathy (MIM#535000), the commonest mitochondrial DNA-related disease, is caused by mutations affecting mitochondrial complex I. The clinical expression of the disorder, usually occurring in young adults, is typically characterized by subacute, usually sequential, bilateral visual loss, resulting from the degeneration of retinal ganglion cells. As the precise action of mitochondrial DNA mutations on the overall cell metabolism in Leber's hereditary optic neuropathy is unknown, we investigated the metabolomic profile of the disease...
September 15, 2016: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/27530093/carbon-disulfide-activates-p62-nrf2-keap1-pathway-in-rat-nerve-tissues
#19
Shasha Wang, Yisi Chen, Ruirui Kou, Yu Wang, Tao Zeng, Keqin Xie, Fuyong Song
Oxidative stress is associated with the pathogenesis of carbon disulfide (CS2) induced polyneuropathy. The nuclear factor erythroid 2-related factor 2 (Nrf2) plays a critical role in protecting cells against oxidative stress. However, whether there exists a Nrf2-mediated antioxidative machinery in CS2-induced neuropathy has not been elucidated. In the present study, male wistar rats were randomly divided into three experimental groups and one control group. The rats in experimental groups were treated with CS2 by gavage at dosages of 200, 400 and 600mg/kg/day respectively, six times per week for 6 weeks...
August 10, 2016: Toxicology
https://www.readbyqxmd.com/read/27496624/the-effects-of-gliclazide-methylcobalamin-and-gliclazide-methylcobalamin-combination-therapy-on-diabetic-peripheral-neuropathy-in-rats
#20
Hongping Yao, Juanyi Feng, Qiaowei Zheng, Youxia Wei, Shixiang Wang, Weiyi Feng
AIMS: This study investigated the efficacies of gliclazide (GLZ), methylcobalamin (MCA), and GLZ+MCA combination therapy on DPN by evaluating the treatment-related changes in peripheral nerve function, the polyol pathway, and oxidative stress in the sciatic nerve of streptozotocin-induced diabetic rats. MATERIALS AND METHODS: The rat model of streptozotocin-induced diabetes was orally given GLZ (25mg/kg/day), MCA (175μg/kg/day), and GLZ+MCA (25mg/kg/day+175μg/kg/day) combination therapy for 8weeks, in order to observe its effects on the motor nerve conduction velocity (MNCV), on the activities of Na(+), K(+)-ATPase, aldose reductase(AR), AR mRNA expression, on the polyol contents, antioxidative enzyme activities and peroxidation products in the sciatic never tissue...
September 15, 2016: Life Sciences
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