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Diabetic vasculopathy

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https://www.readbyqxmd.com/read/28429615/regulation-of-vascular-large-conductance-calcium-activated-potassium-channels-by-nrf2-signalling
#1
Yong Li, Xiao-Li Wang, Xiaojing Sun, Qiang Chai, Jingchao Li, Benjamin Thompson, Win-Kuang Shen, Tong Lu, Hon-Chi Lee
BK channels are major ionic determinants of vasodilation. BK channel function is impaired in diabetic vessels due to accelerated proteolysis of its beta-1 (BK-β1) subunits in response to increased oxidative stress. The nuclear factor E2-related factor-2 (Nrf2) signalling pathway has emerged as a master regulator of cellular redox status, and we hypothesized that it plays a central role in regulating BK channel function in diabetic vessels. We found that Nrf2 expression was markedly reduced in db/db diabetic mouse aortas, and this was associated with significant downregulation of BK-β1...
April 1, 2017: Diabetes & Vascular Disease Research
https://www.readbyqxmd.com/read/28408138/diabetic-retinopathy-is-a-neurodegenerative-disorder
#2
Stephanie K Lynch, Michael D Abràmoff
Since 1875, controversy has ensued over whether ocular diabetic complications are primarily vasculopathic or neuropathic in nature. Here, we discuss the historical context by which diabetic retinopathy (DR) came to be considered a primary vasculopathy, in contrast to more recent data suggesting the importance of diabetic retinal neurodegeneration (DRN) as the primary manifestation of ocular diabetic damage. Unsurprisingly, DRN parallels other diabetic complications related to neuropathy. In general, there are three possible relationships between microvascular DR and DRN: i) microvasculopathy causes neurodegeneration; ii) neurodegeneration causes microvasculopathy or iii) they are mutually independent...
April 10, 2017: Vision Research
https://www.readbyqxmd.com/read/28393035/retinal-ganglion-cell-complex-changes-using-spectral-domain-optical-coherence-tomography-in-diabetic-patients-without-retinopathy
#3
Ahmed I Hegazy, Rasha H Zedan, Tamer A Macky, Soheir M Esmat
AIM: To assess the ganglion cell complex (GCC) thickness in diabetic eyes without retinopathy. METHODS: Two groups included 45 diabetic eyes without retinopathy and 21 non diabetic eyes. All subjects underwent full medical and ophthalmological history, full ophthalmological examination, measuring GCC thickness and central foveal thickness (CFT) using the RTVue(®) spectral domain-optical coherence tomography (SD-OCT), and HbA1C level. RESULTS: GCC focal loss volume (FLV%) was significantly more in diabetic eyes (22...
2017: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/28392041/arterial-stiffness-is-an-independent-predictor-for-albuminuria-progression-among-asians-with-type-2-diabetes-a-prospective-cohort-study
#4
Xiao Zhang, Serena Low, Chee Fang Sum, Subramaniam Tavintharan, Yeoh Lee Ying, Jianjun Liu, Na Li, Keven Anga, Simon Bm Lee, Wern Ee Tang, Su Chi Lim
AIM: Albuminuria progression has been associated with renal deterioration in type 2 diabetes (T2DM). Central arterial stiffness can aggravate systemic vasculopathy by propagating elevated systolic and pulse pressures forward, thereby accentuating global vascular injury. We aim to investigate whether central arterial stiffness is an independent predictor for albuminuria progression in a multi-ethnic T2DM Asian cohort in Singapore. METHODS: In a prospective cohort, 1012 T2DM patients were assessed at baseline and after a median follow-up of 3...
February 14, 2017: Journal of Diabetes and its Complications
https://www.readbyqxmd.com/read/28356033/a-glycation-angle-to-look-into-the-diabetic-vasculopathy-cause-and-cure
#5
Saheem Ahmad, Zeba Siddiqui, Shahnawaz Rehman, Mohd Yasir Khan, Hamda Khan, Sheeba Khanum, Sultan Alouffi, Mohd Saeed
The process of advanced glycation, which is accelerated in diabetes as a result of chronic hyperglycemia and increased oxidative stress, has been suggested to play a vital role in the diabetic complications. Extensive intracellular and extracellular generation and accumulation of advanced glycation end products (AGEs) have been linked to increased risk for microvascular and macrovascular injuries in diabetes. AGEs result from the nonenzymatic reaction of reducing sugars with proteins, lipids, and nucleic acids, potentially altering their function...
March 27, 2017: Current Vascular Pharmacology
https://www.readbyqxmd.com/read/28286103/the-vascular-protective-effects-of-anoectochilus-roxburghii-polysaccharose-under-high-glucose-conditions
#6
Zhen-Ling Liu, Jian-Gang Zhang, Qing Liu, Li-Tao Yi, Yu-Meng Li, Ya Li
ETHNOPHARMACOLOGICAL RELEVANCE: Anoectochilus roxburghii has been used as a health food and a herb for treatment diabetes in China for hundreds years. Anoectochilus roxburghii polysaccharose (ARP) is the major active component of the plant. AIM OF THE STUDY: The present study investigated the vascular protection of ARP in vivo and in vitro experiments. MATERIALS AND METHODS: Hypoglycemic activity of ARP was examined in diabetic mice. Moreover, the further vascular protective effects in vitro were investigated in human umbilical vein endothelial cells (HUVECs) stimulated by high glucose (HG, 35mM)...
March 9, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28216809/healing-ulcers-and-preventing-their-recurrences-in-the-diabetic-foot
#7
S Raja Sabapathy, Madhu Periasamy
Fifteen percent of people with diabetes develop an ulcer in the course of their lifetime. Eighty-five percent of the major amputations in diabetes mellitus are preceded by an ulcer. Management of ulcers and preventing their recurrence is important for the quality of life of the individual and reducing the cost of care of treatment. The main causative factors of ulceration are neuropathy, vasculopathy and limited joint mobility. Altered bio-mechanics due to the deformities secondary to neuropathy and limited joint mobility leads to focal points of increased pressure, which compromises circulation leading to ulcers...
September 2016: Indian Journal of Plastic Surgery: Official Publication of the Association of Plastic Surgeons of India
https://www.readbyqxmd.com/read/28212798/protein-kinase-c-as-regulator-of-vascular-smooth-muscle-function-and-potential-target-in-vascular-disorders
#8
H C Ringvold, R A Khalil
Vascular smooth muscle (VSM) plays an important role in maintaining vascular tone. In addition to Ca(2+)-dependent myosin light chain (MLC) phosphorylation, protein kinase C (PKC) is a major regulator of VSM function. PKC is a family of conventional Ca(2+)-dependent α, β, and γ, novel Ca(2+)-independent δ, ɛ, θ, and η, and atypical ξ, and ι/λ isoforms. Inactive PKC is mainly cytosolic, and upon activation it undergoes phosphorylation, maturation, and translocation to the surface membrane, the nucleus, endoplasmic reticulum, and other cell organelles; a process facilitated by scaffold proteins such as RACKs...
2017: Advances in Pharmacology
https://www.readbyqxmd.com/read/28164755/regulation-of-na-k-atpase-by-estradiol-and-igf-1-in-cardio-metabolic-diseases
#9
Milan Obradovic, Julijana Stanimirovic, Anastasija Panic, Nikola Bogdanovic, Emina Sudar-Milovanovic, Desanka Cenic-Milosevic, Esma R Isenovic
BACKGROUND: The sodium/potassium- adenosine- triphosphatase (Na+/K+-ATPase) is an important mediator in vasculature tone and contractility, and its abnormal regulation has been implicated in many diseases such as obesity, insulin resistance, diabetes, and hypertension. Decreased Na+/K+-ATPase abundance and its altered isoform expression induce cardiomyocytes death and cardiac dysfunction, possibly leading to the development of myocardial dilation and heart failure. Therefore, the regulation of Na+/K+-ATPase activity/expression could be important in treatment and possible prevention of cardio-metabolic diseases...
February 3, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28160092/combined-nox1-4-inhibition-with-gkt137831-in-mice-provides-dose-dependent-reno-and-atheroprotection-even-in-established-micro-and-macrovascular-disease
#10
Stephen P Gray, Jay C Jha, Kit Kennedy, Erik van Bommel, Phyllis Chew, Cedric Szyndralewiez, Rhian M Touyz, Harald H H W Schmidt, Mark E Cooper, Karin A M Jandeleit-Dahm
AIMS/HYPOTHESIS: Oxidative stress is a promising target in diabetes-associated vasculopathies, with inhibitors of NADPH oxidases (NOX), in particular isoforms 1 and 4, shown to be safe in early clinical development. We have explored a highly relevant late-stage intervention protocol using the clinically most advanced compound, the NOX1/4 inhibitor GKT137831, to determine whether end-organ damage can be reversed/attenuated when GKT137831 is administered in the setting of established diabetic complications...
February 3, 2017: Diabetologia
https://www.readbyqxmd.com/read/28127984/pregnancy-and-neonatal-outcomes-in-women-with-type-1-diabetes-mellitus
#11
L Durackova, A Kristufkova, M Korbel
AIM: The aim of study was to compare some perinatal outcomes in mothers with type 1 diabetes mellitus (T1DM). MATERIAL AND METHODS: All patients with T1DM delivered at the 1st Department of Obstetrics and Gynaecology of Faculty of Medicine, Comenius University in Bratislava from January 1st 2009 to December 31th 2015 were included to the study. RESULTS: Out of 118 diabetic mothers, 46.6 % had vasculopathy and 53. 4 % were without microvascular complications...
2017: Bratislavské Lekárske Listy
https://www.readbyqxmd.com/read/28053502/neovascular-age-related-macular-degeneration-without-drusen-in-the-fellow-eye-clinical-spectrum-and-therapeutic-outcome
#12
Wing H Chung, Elon H C van Dijk, Danial Mohabati, Greet Dijkman, Suzanne Yzer, Eiko K de Jong, Sascha Fauser, Reinier O Schlingemann, Carel B Hoyng, Camiel J F Boon
PURPOSE: To investigate the clinical characteristics and therapeutic outcome of patients with neovascular age-related macular degeneration (nAMD) in 1 eye, without drusen in the fellow eye. PATIENTS AND METHODS: Medical records of 381 patients were analyzed to identify the cases. The main outcomes included Early Treatment Diabetic Retinopathy Study (ETDRS) best-corrected visual acuity (BCVA) and change in central retinal thickness (CRT). These parameters were reviewed at baseline, first follow-up visit, and after 6, 12, and 24 months...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/28050322/does-retinal-neurodegeneration-seen-in-diabetic-patients-begin-in-the-insulin-resistance-stage
#13
Sedat Arıkan, İsmail Erşan, Mustafa Eroğlu, Mehmet Yılmaz, Hasan Ali Tufan, Baran Gencer, Selçuk Kara, Mehmet Aşık
OBJECTIVES: To investigate whether retinal neurodegeneration and impairment in contrast sensitivity (CS), which have been demonstrated to begin in diabetic patients before the presence of signs of diabetic retinal vasculopathy, also occur in the stage of insulin resistance. MATERIALS AND METHODS: The average, minimum and sectoral (inferior, superior, inferonasal, superonasal, inferotemporal and superotemporal) thicknesses of the ganglion cell-inner plexiform layer (GCIPL) measured using optical coherence tomography were compared between an insulin-resistant group and control group in order to evaluate the presence of retinal neurodegeneration...
December 2016: Turkish Journal of Ophthalmology
https://www.readbyqxmd.com/read/28012449/placental-maternal-vascular-malperfusion-and-adverse-pregnancy-outcomes-in-gestational-diabetes-mellitus
#14
Christina M Scifres, W Tony Parks, Maisa Feghali, Steve N Caritis, Janet M Catov
INTRODUCTION: Maternal vascular malperfusion (MVM) lesions represent hypoxic-ischemic damage to the placenta, and they are associated with adverse pregnancy outcomes. Women with gestational diabetes (GDM) are at increased risk for pregnancy complications, so we set out to characterize the prevalence and clinical correlates of MVM lesions in this cohort. METHODS: This was a retrospective cohort study of 1187/1374 (86.4%) women with GDM delivered between 2009 and 2012 who had placental pathology available...
January 2017: Placenta
https://www.readbyqxmd.com/read/27942587/chorioretinal-thinning-in-chronic-kidney-disease-links-to-inflammation-and-endothelial-dysfunction
#15
Craig Balmforth, Job J M H van Bragt, Titia Ruijs, James R Cameron, Robert Kimmitt, Rebecca Moorhouse, Alicja Czopek, May Khei Hu, Peter J Gallacher, James W Dear, Shyamanga Borooah, Iain M MacIntyre, Tom M C Pearson, Laura Willox, Dinesh Talwar, Muriel Tafflet, Christophe Roubeix, Florian Sennlaub, Siddharthan Chandran, Baljean Dhillon, David J Webb, Neeraj Dhaun
BACKGROUND. Chronic kidney disease (CKD) is strongly associated with cardiovascular disease and there is an established association between vasculopathy affecting the kidney and eye. Optical coherence tomography (OCT) is a novel, rapid method for high-definition imaging of the retina and choroid. Its use in patients at high cardiovascular disease risk remains unexplored. METHODS. We used the new SPECTRALIS OCT machine to examine retinal and retinal nerve fiber layer (RNFL) thickness, macular volume, and choroidal thickness in a prospective cross-sectional study in 150 subjects: 50 patients with hypertension (defined as a documented clinic BP greater than or equal to 140/90 mmHg (prior to starting any treatment) with no underlying cause identified); 50 with CKD (estimated glomerular filtration rate (eGFR) 8-125 ml/min/1...
December 8, 2016: JCI Insight
https://www.readbyqxmd.com/read/27939902/cilostazol-protects-against-microvascular-brain-injury-in-a-rat-model-of-type-2-diabetes
#16
Yuko Tsukamoto, Eiichiro Nagata, Naoto Fukuyama, Yoshiko Itoh, Hiroko Yuzawa, Saori Kohara, Mie Shimizu, Yoko Takahari, Shunya Takizawa
Cilostazol, a pluripotent phosphodiesterase III-specific inhibitor with anti-platelet and vasculogenic effects, is useful for preventing recurrent brain vascular events, particularly in stroke patients with diabetes mellitus (DM). However, it is unclear whether cilostazol affects autoregulatory responses in small cerebral arteries. Thus, we investigated the effect of cilostazol on diabetic brain vasculopathy in a model of type II DM using male OLETF rats. OLETF rats were treated with either cilostazol (CG) or vehicle (VG) and subjected to microangiography with monochromatic synchrotron radiation to investigate middle cerebral artery (MCA) vasoreactivity following an injection of acetylcholine (Ach)...
December 8, 2016: Neuroscience Research
https://www.readbyqxmd.com/read/27865316/soft-tissue-reconstruction-pyramid-for-the-diabetic-charcot-foot
#17
REVIEW
Claire M Capobianco, Thomas Zgonis
Foot and ankle ulcerations in patients with diabetic Charcot neuroarthropathy (DCN) occur frequently and can be challenging to address surgically when conservative care fails. Patients with acute or chronic diabetic foot ulcers (DFU) are at continued risk for development of osteomyelitis, septic arthritis, gas gangrene, and potential lower extremity amputation. Concurrent vasculopathy and peripheral neuropathy as well as uncontrolled medical comorbidities complicate the treatment approach. In addition, pathomechanical forces left untreated may contribute to DFU recurrence in this patient population...
January 2017: Clinics in Podiatric Medicine and Surgery
https://www.readbyqxmd.com/read/27862865/long-term-clinical-and-angiographic-outcomes-of-percutanenous-coronary-intervention-with-everolimus-eluting-stents-for-the-treatment-of-cardiac-allograft-vasculopathy
#18
Richard Cheng, Christopher Vanichsarn, Jignesh K Patel, Jesse Currier, David H Chang, Michelle M Kittleson, Raj Makkar, Jon A Kobashigawa, Babak Azarbal
BACKGROUND: Percutaneous coronary intervention (PCI) with bare-metal and first-generation drug-eluting stents (DES) for cardiac allograft vasculopathy (CAV) is associated with unexpectedly high restenosis rates and target lesion revascularization (TLR). Long-term outcomes of stenting for CAV using second-generation everolimus-eluting stents (EES) are not established. OBJECTIVE: To evaluate clinical and angiographic outcomes of CAV stenting with EES. METHODS: Patients who underwent PCI with EES for CAV were studied...
November 10, 2016: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/27856609/ppar%C3%AE-is-required-for-exercise-to-attenuate-endoplasmic-reticulum-stress-and-endothelial-dysfunction-in-diabetic-mice
#19
Wai San Cheang, Wing Tak Wong, Lei Zhao, Jian Xu, Li Wang, Chi Wai Lau, Zhen Yu Chen, Ronald Ching Wan Ma, Aimin Xu, Nanping Wang, Xiao Yu Tian, Yu Huang
Physical activity has profound benefits on health, especially on cardiometabolic wellness. Experiments in rodents with trained exercise have shown that exercise improves vascular function and reduces vascular inflammation by modulating the balance between nitric oxide (NO) and oxidative stress. However, the upstream regulator of exercise-induced vascular benefits is unclear. We aimed to investigate the involvement of peroxisome proliferator-activated receptor δ (PPARδ) in exercise-induced vascular functional improvement...
February 2017: Diabetes
https://www.readbyqxmd.com/read/27814624/micrornas-in-control-of-gene-regulatory-programs-in-diabetic-vasculopathy
#20
Chongzhe Pei, Xiaoping Zhang, Shu Meng, Yigang Li
Diabetes is generally associated with vasculopathy, which contains both microvascular and macrovascular complications, associated with high morbidity and mortality. Currently, despite interventional therapy, the overall prognosis for patients with diabetic vasculopathy remains unsatisfactory. Angiogenesis and vascular injury and repair are associated with a variety of cells. However, the molecular mechanisms of the cells that are involved in pathogenesis of diabetic vasculopathy remain largely unknown. As novel molecules, microRNAs (miRs) take part in regulating protein-coding gene expression at the post-transcriptional level, and contribute to the pathogenesis of various types of chronic metabolism disease, especially diabetic vasculopathy...
January 1, 2017: Frontiers in Bioscience (Landmark Edition)
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