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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
#1
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/28296226/diabetic-polyneuropathy-is-a-risk-factor-for-decline-of-lower-extremity-strength-in-patients-with-type-2-diabetes
#2
Takuo Nomura, Tomoyasu Ishiguro, Masayoshi Ohira, Yukio Ikeda
AIMS/INTRODUCTION: The present study elucidated the effect of diabetic polyneuropathy (DPN) on lower extremity strength in a wide age range of type 2 diabetic patients. MATERIALS AND METHODS: Participants (n = 1,442) were divided into three age groups (30-49 years, 50-69 years, and 70-87 years), and comparisons were made separately for each sex. Lower extremity strength was measured in terms of knee extension force (KEF) with a hand-held dynamometer. KEF was compared according to the presence or absence of DPN...
March 14, 2017: Journal of Diabetes Investigation
https://www.readbyqxmd.com/read/28290778/improved-neural-microcirculation-and-regeneration-after-peripheral-nerve-decompression-in-dpn-rats
#3
Wenxiang Zhong, Min Yang, Wenchuan Zhang, Massimiliano Visocchi, Xiangjun Chen, Chenlong Liao
OBJECTIVE: Recently, neural microcirculation and regeneration were regarded as critical factors in diabetic peripheral neuropathy (DPN) improvement. In the present study, we explored the cytological and molecular mechanisms how peripheral nerve decompression impaired nerve injury. METHODS: Forty-five male SD rats were established as the DPN model. HE staining was used to observe the morphology and distribution of microvessels. Transmission electron microscopy was applied to observe the morphology and distribution of Schwann cells...
March 14, 2017: Neurological Research
https://www.readbyqxmd.com/read/28285381/the-impact-of-type-1-diabetes-and-diabetic-polyneuropathy-on-muscle-strength-and-fatigability
#4
Giorgio Orlando, Stefano Balducci, Ilenia Bazzucchi, Giuseppe Pugliese, Massimo Sacchetti
AIMS: Although it is widely accepted that diabetic polyneuropathy (DPN) is linked to a marked decline in neuromuscular performance, information on the possible impact of type 1 diabetes (T1D) on muscle strength and fatigue remains unclear. The purpose of this study was to investigate the effects of T1D and DPN on strength and fatigability in knee extensor muscles. METHODS: Thirty-one T1D patients (T1D), 22 T1D patients with DPN (DPN) and 23 matched healthy control participants (C) were enrolled...
March 11, 2017: Acta Diabetologica
https://www.readbyqxmd.com/read/28279754/estrogen-receptors-er%C3%AE-and-er%C3%AE-participation-in-hypothalamus-pituitary-adrenal-axis-activation-by-hemorrhagic-stress
#5
Luana Maria Silva Alves, Procópio Cleber Gama de Barcellos Filho, Celso Rodrigues Franci
The sympato-adrenal-system and hypothalamus-pituitary-adrenal (HPA) axis are anatomically and functionally connected with participation of several brain areas that express estrogen receptors (ERα and ERβ). We assessed the neuronal activity of these areas for FOS expression and the action of PPT (ERα agonist) or DPN (ERβ agonist) in HPA axis activity during hemorrhagic stress. Ovariectomized Wistar rats treated with vehicle (DMSO) or ER agonists were catheterized for blood collection. Animals received (control) or not (hemorrhagic) immediate reposition with the same volume of saline...
March 6, 2017: Neuroscience
https://www.readbyqxmd.com/read/28272773/comparative-rna-seq-transcriptome-analyses-reveal-distinct-metabolic-pathways-in-diabetic-nerve-and-kidney-disease
#6
Lucy M Hinder, Meeyoung Park, Amy E Rumora, Junguk Hur, Felix Eichinger, Subramaniam Pennathur, Matthias Kretzler, Frank C Brosius, Eva L Feldman
Treating insulin resistance with pioglitazone normalizes renal function and improves small nerve fibre function and architecture; however, it does not affect large myelinated nerve fibre function in mouse models of type 2 diabetes (T2DM), indicating that pioglitazone affects the body in a tissue-specific manner. To identify distinct molecular pathways regulating diabetic peripheral neuropathy (DPN) and nephropathy (DN), as well those affected by pioglitazone, we assessed DPN and DN gene transcript expression in control and diabetic mice with or without pioglitazone treatment...
March 8, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28268190/the-short-version-of-the-activities-specific-balance-confidence-scale-for-older-adults-with-diabetes-convergent-discriminant-and-concurrent-validity-a-pilot-study
#7
Patricia Hewston, Nandini Deshpande
OBJECTIVES: The short version of the Activities-Specific Balance Confidence Scale (ABC-6) is advantageous in busy clinical or research settings because it can be administered in less time than the original 16-item Activities-Specific Balance Confidence Scale (ABC-16). This pilot study examined the convergent, discriminant and concurrent validity of the ABC-6 in older adults with diabetes mellitus with and without diagnosed diabetic peripheral neuropathy (DPN). METHODS: Thirty older adults (aged ≥65) were age- and sex-matched in 3 groups: 10 with diabetes (DM group), 10 with diagnosed DPN (DPN group) and 10 without diabetes (no-DM group)...
March 3, 2017: Canadian Journal of Diabetes
https://www.readbyqxmd.com/read/28267267/peripheral-neuropathy-in-prediabetes-and-the-metabolic-syndrome
#8
REVIEW
Amro M Stino, A Gordon Smith
Peripheral neuropathy is a major cause of disability worldwide. Diabetes is the most common cause of neuropathy, accounting for 50% of cases. Over half of people with diabetes develop neuropathy, and diabetic neuropathy (DPN) is a major cause of reduced quality of life due to pain, sensory loss, gait instability, fall related injury, and foot ulceration and amputation. Most patients with nondiabetic neuropathy have cryptogenic sensory peripheral neuropathy (CSPN). A growing body of literature links prediabetes, obesity and metabolic syndrome (MetS) to risk of both DPN and CSPN (CSPN-MetS)...
March 7, 2017: Journal of Diabetes Investigation
https://www.readbyqxmd.com/read/28250049/diabetic-polyneuropathy-sensory-neurons-nuclear-structure-and-spliceosome-alterations-a-role-for-cwc22
#9
Masaki Kobayashi, Ambika Chandrasekhar, Chu Cheng, Jose A Martinez, Hilarie Ng, Cristiane de la Hoz, Douglas W Zochodne
Unique deficits in the function of adult sensory neurons as part of their early neurodegeneration might account for progressive polyneuropathy during chronic diabetes mellitus. Here, we provide structural and functional evidence for aberrant pre-mRNA splicing in a chronic type 1 model of experimental diabetic polyneuropathy (DPN). Cajal bodies (CBs), unique nuclear substructures involved in RNA splicing, increased in number in diabetic sensory neurons, but their expected colocalization with survival motor neuron (SMN) proteins was reduced - a mislocalization described in motor neurons of spinal muscular atrophy...
March 1, 2017: Disease Models & Mechanisms
https://www.readbyqxmd.com/read/28231061/role-of-treatment-modifying-mthfr677c-t-and-1298a-c-polymorphisms-in-metformin-treated-puerto-rican-patients-with-type-2-diabetes-mellitus-and-peripheral-neuropathy
#10
Francisco J Jiménez-Ramírez, Liza M Castro, Clarymar Ortiz, Jennifer Concepción, Jessicca Y Renta, Raúl H Morales-Borges, Jorge R Miranda-Massari, Jorge Duconge
BACKGROUND: The study was conducted to investigate potential association between MTHFR genotypes and diabetic peripheral neuropathy (DPN) in Puerto Ricans with type-2 diabetes mellitus (T2DM) treated with metformin. The prevalence of major MTHFR polymorphisms in this cohort was also ascertained. METHODS: DNAs from 89 metformin-treated patients with T2DM and DPN were genotyped using the PCR-based RFLP assay for MTHFR677C>T and 1298A>C polymorphisms. Frequency distributions of these variants in the study cohort were compared to those reported for three reference populations (HapMap project) and controls (400 newborn specimens)...
March 1, 2017: Drug Metabolism and Personalized Therapy
https://www.readbyqxmd.com/read/28228847/c-peptide-is-independent-associated-with-diabetic-peripheral-neuropathy-a-community-based-study
#11
Xiaona Qiao, Hangping Zheng, Shuo Zhang, Siying Liu, Qian Xiong, Fei Mao, Zhaoyun Zhang, Jie Wen, Hongying Ye, Yiming Li, Bin Lu
BACKGROUND: Because the relationship between C-peptide and diabetic peripheral neuropathy (DPN) is controversial, the aim of our study was to evaluate the relationship between C-peptide and DPN in community-based Chinese patients with type 2 diabetes. METHODS: In total, 220 consecutive type 2 diabetic patients treated by our regional medical consortium were enrolled. DPN was assessed by clinical symptoms, signs, and electromyography. RESULTS: Fasting C-peptide, 2-h postprandial C-peptide and ΔC-peptide (i...
2017: Diabetology & Metabolic Syndrome
https://www.readbyqxmd.com/read/28224646/later-stages-of-diabetic-neuropathy-affect-the-complexity-of-the-neuromuscular-system-at-the-knee-during-low-level-isometric-contractions
#12
Eneida Y Suda, Isabel Cn Sacco, Rogerio P Hirata, Afshin Samani, Thiago T Kawamura, Pascal Madeleine
INTRODUCTION: The aim of this study was to evaluate the complexity of force and surface electromyography (sEMG) during knee extension and flexion at low-level isometric contractions in individuals with different degrees of diabetic peripheral neuropathy (DPN). METHODS: Ten control and 38 diabetic subjects performed isometric contractions at 10%, 20% and 30% of maximal voluntary contraction. Knee force and multichannel sEMG from vastus lateralis (VL) and biceps femoris (BF) were acquired...
February 22, 2017: Muscle & Nerve
https://www.readbyqxmd.com/read/28223295/a-model-of-chronic-diabetic-polyneuropathy-benefits-from-intranasal-insulin-are-modified-by-sex-and-rage-deletion
#13
Cristiane L de la Hoz, Chu Cheng, Paul Fernyhough, Douglas W Zochodne
Human diabetic polyneuropathy (DPN) is a progressive complication of chronic diabetes mellitus. Preliminary evidence has suggested that intranasal insulin, in doses insufficient to alter hyperglycemia, suppresses the development of DPN. In this work we confirm this finding, but demonstrate that its impact is modified by sex and deletion of RAGE, the receptor for advanced glycosylation endproducts. We serially evaluated experimental DPN in male and female wild type mice and male RAGE null (RN) mice, each with nondiabetic controls, during 16 weeks of diabetes, the final 8 weeks including groups given intranasal insulin...
February 21, 2017: American Journal of Physiology. Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28215489/the-role-of-estrogen-receptor-subtypes-for-induction-of-delayed-effects-on-the-estrous-cycle-and-female-reproductive-organs-in-rats
#14
Miwa Takahashi, Ryohei Ichimura, Kaoru Inoue, Tomomi Morikawa, Kazunori Kuwata, Gen Watanabe, Midori Yoshida
It has been reported that neonatal exposure to estrogens at relatively low doses can induce early onset anovulation as a delayed effect in female rats. Dysfunction of kisspeptin neurons in the anteroventral periventricular nucleus (AVPV) was proposed to be a trigger for this effect. To determine the roles of estrogen receptor (ER) subtypes in the induction of delayed effects, we conducted a series of experiments using Donryu rats to examine whether neonatal injection of an ERα agonist (PPT), an ERβ agonist (DPN) or an ERα antagonist (ICI) could induce delayed effects...
February 16, 2017: Reproductive Biology
https://www.readbyqxmd.com/read/28202549/relationships-between-type-2-diabetes-neuropathy-and-microvascular-dysfunction-evidence-from-patients-with-cryptogenic-axonal-polyneuropathy
#15
Anna L Emanuel, Mariska D Nieuwenhoff, Erica S Klaassen, Ajay Verma, Mark H H Kramer, Rob Strijers, Alexander F J E Vrancken, Etto Eringa, Geert Jan Groeneveld, Erik H Serné
OBJECTIVE: This study investigated whether the relationship between neuropathy and microvascular dysfunction in patients with type 2 diabetes is independent of diabetes-related factors. For this purpose, we compared skin microvascular function in patients with type 2 diabetes with that of patients with cryptogenic axonal polyneuropathy (CAP), a polyneuropathy of unknown etiology. RESEARCH DESIGN AND METHODS: Cross-sectional information was collected from 16 healthy controls (HCs), 16 patients with CAP, 15 patients with type 2 diabetes with polyneuropathy (DPN), and 11 patients with type 2 diabetes without polyneuropathy...
February 15, 2017: Diabetes Care
https://www.readbyqxmd.com/read/28191471/lipids-a-suitable-therapeutic-target-in-diabetic-neuropathy
#16
REVIEW
M C Perez-Matos, M C Morales-Alvarez, C O Mendivil
Diabetic polyneuropathy (DPN) encompasses multiple syndromes with a common pathogenesis. Glycemic control shows a limited correlation with DPN, arguing in favor of major involvement of other factors, one of which is alterations of lipid and lipoprotein metabolism. Consistent associations have been found between plasma triglycerides/remnant lipoproteins and the risk of DPN. Studies in cultured nerve tissue or in murine models of diabetes have unveiled mechanisms linking lipid metabolism to DPN. Deficient insulin action increases fatty acids flux to nerve cells, inducing mitochondrial dysfunction, anomalous protein kinase C signaling, and perturbations in the physicochemical properties of the plasma membrane...
2017: Journal of Diabetes Research
https://www.readbyqxmd.com/read/28190898/synthesis-and-opioid-receptor-binding-of-indium-iii-and-111-in-labeled-macrocyclic-conjugates-of-diprenorphine-novel-ligands-designed-for-imaging-studies-of-peripheral-opioid-receptors
#17
Shefali Srivastava, Emily A Fergason-Cantrell, Roger I Nahas, John R Lever
Radiolabeled diprenorphine (DPN) and analogs are widely used ligands for non-invasive brain imaging of opioid receptors. To develop complementary radioligands optimized for studies of the peripheral opioid receptors, we prepared a pair of hydrophilic DPN derivatives, conjugated to the macrocyclic chelator DOTA (1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid), for complexation with trivalent metals. The non-radioactive indium (III) complexes, tethered to the C6-oxygen position of the DPN scaffold by 6- to 9-atom spacers, displayed high affinities for binding to μ, δ and κ opioid receptors in vitro...
October 6, 2016: Tetrahedron
https://www.readbyqxmd.com/read/28179465/variability-of-fasting-plasma-glucose-increased-risks-of-diabetic-polyneuropathy-in-t2dm
#18
Chun-Pai Yang, Chia-Ing Li, Chiu-Shong Liu, Wen-Yuan Lin, Kai-Lin Hwang, Sing-Yu Yang, Tsai-Chung Li, Cheng-Chieh Lin
OBJECTIVE: To examine whether variations in fasting plasma glucose (FPG), as measured by the coefficient of variation (CV), is a predictor of diabetic polyneuropathy (DPN) risk, considering glycated hemoglobin (HbA1c) and other traditional risk factors. METHODS: Type 2 diabetic patients enrolled in the National Diabetes Care Management Program were ≥30 years of age and free of DPN (n = 36,152). They were enrolled in 2002-2004 and were monitored until 2011. The related factors were analyzed using Cox proportional hazards regression models...
February 8, 2017: Neurology
https://www.readbyqxmd.com/read/28165704/biomimetic-phospholipid-membrane-organization-on-graphene-and-graphene-oxide-surfaces-a-molecular-dynamics-simulation-study
#19
Nathalie Willems, Ainhoa Urtizberea, Andrea F Verre, Maria Iliut, Mickael Lelimousin, Michael Hirtz, Aravind Vijayaraghavan, Mark S P Sansom
Supported phospholipid membrane patches stabilized on graphene surfaces have shown potential in sensor device functionalization, including biosensors and biocatalysis. Lipid dip-pen nanolithography (L-DPN) is a method useful in generating supported membrane structures that maintain lipid functionality, such as exhibiting specific interactions with protein molecules. Here, we have integrated L-DPN, atomic force microscopy, and coarse-grained molecular dynamics simulation methods to characterize the molecular properties of supported lipid membranes (SLMs) on graphene and graphene oxide supports...
February 28, 2017: ACS Nano
https://www.readbyqxmd.com/read/28133612/tang-luo-ning-improves-mitochondrial-antioxidase-activity-in-dorsal-root-ganglia-of-diabetic-rats-a-proteomics-study
#20
Taojing Zhang, Yanbin Gao, Yanbin Gong, Hui Zhou, Peifeng Xie, Song Guan, Wenming Yi
Tang-luo-ning (TLN) is a traditional Chinese herbal recipe for treating diabetic peripheral neuropathy (DPN). In this study, we investigated mitochondrial protein profiles in a diabetic rat model and explored the potential protective effect of TLN. Diabetic rats were established by injection of streptozocin (STZ) and divided into model, alpha lipoic acid (ALA), and TLN groups. Mitochondrial proteins were isolated from dorsal root ganglia and proteomic analysis was used to quantify the differentially expressed proteins...
2017: BioMed Research International
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