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https://www.readbyqxmd.com/read/29675479/associations-of-diabetic-retinopathy-with-retinal-neurodegeneration-on-the-background-of-diabetes-mellitus-overview-of-recent-medical-studies-with-an-assessment-of-the-impact-on-healthcare-systems
#1
Rafał Muc, Agnieszka Saracen, Iwona Grabska-Liberek
Diabetes Mellitus (DM) is one of the biggest healthcare and financial problems worldwide. The disease is strongly associated with microvascular and macrovascular complications, causing co-existing diseases like Diabetic Retinopathy, Diabetic Neuropathy and Diabetic Nephropathy. Annual healthcare expenditures for diabetes treatment and complications prevention cost 727 billion USD in year 2017. Diabetes Mellitus, Diabetic Retinopathy and Diabetic Retinal Neuropathy are closely related diseases - originating from incorrectly controlled glycemia, blood pressure and lipid levels in the course of increasing resistance of the body tissues to insulin...
2018: Open Medicine (Warsaw, Poland)
https://www.readbyqxmd.com/read/29652749/sera-from-children-after-cardiopulmonary-bypass-reduces-permeability-of-capillary-endothelial-cell-barriers
#2
Richard W Pierce, Riad Abou Zahr, Sarah Kandil, E Vincent S Faustino, Jordan S Pober
OBJECTIVES: Children undergoing cardiopulmonary bypass develop clinically impactful capillary leak of unclear etiology. A widely held hypothesis that exposure of circulating cells to the cardiopulmonary bypass circuit induces the release of inflammatory mediators that act to disrupt intercellular junctions of capillary endothelial cells inducing paracellular capillary leak either directly or through new gene expression. DESIGN: Cohort study. SETTING: Tertiary pediatric hospital...
April 12, 2018: Pediatric Critical Care Medicine
https://www.readbyqxmd.com/read/29650793/cause-or-effect-microvascular-dysfunction-in-insulin-resistant-states
#3
EDITORIAL
Jonathan R Lindner
No abstract text is available yet for this article.
April 2018: Circulation. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29650791/impairments-in-adipose-tissue-microcirculation-in-type-2-diabetes-mellitus-assessed-by-real-time-contrast-enhanced-ultrasound
#4
Donghua Hu, Devika Remash, Ryan D Russell, Timothy Greenaway, Stephen Rattigan, Kathryn A Squibb, Graeme Jones, Dino Premilovac, Stephen M Richards, Michelle A Keske
BACKGROUND: In obesity and type 2 diabetes mellitus (T2D), adipose tissue expansion (because of larger adipocytes) results in reduced microvascular density which is thought to lead to adipocyte hypoxia, inflammation, and reduced nutrient delivery to the adipocyte. Adipose tissue microvascular responses in humans with T2D have not been extensively characterized. Furthermore, it has not been determined whether impaired microvascular responses in human adipose tissue are most closely associated with adiposity, inflammation, or altered metabolism...
April 2018: Circulation. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29627899/influence-of-visual-functional-mismatch-on-coronary-flow-profiles-after-percutaneous-coronary-intervention-a-propensity-score-matched-analysis
#5
Masahiro Hoshino, Taishi Yonetsu, Tadashi Murai, Yoshihisa Kanaji, Eisuke Usui, Masahiro Hada, Rikuta Hamaya, Yoshinori Kanno, Tetsumin Lee, Tsunekazu Kakuta
The aims of this study are to clarify whether discrepancies between angiographic and fractional flow reserve (FFR) measurements (visual-functional mismatch) influence coronary flow profiles after percutaneous coronary intervention. While current guidelines FFR-guided revascularization, clinical practice most commonly relies on angiographic evaluation, which may under- or over-estimate the functional relevance of the lesion. Our retrospective analysis involved 274 vessels from 264 patients with stable angina pectoris who underwent FFR, index of microvascular resistance, and coronary flow reserve (CFR) measurements before and after PCI...
April 7, 2018: Heart and Vessels
https://www.readbyqxmd.com/read/29626067/endothelial-c-type-natriuretic-peptide-acts-on-pericytes-to-regulate-microcirculatory-flow-and-blood-pressure
#6
Katarina Špiranec, Wen Chen, Franziska Werner, Viacheslav O Nikolaev, Takashi Naruke, Franziska Koch, Andrea Werner, Petra Eder-Negrin, Rodrigo Diéguez-Hurtado, Ralf H Adams, Hideo A Baba, Hannes Schmidt, Kai Schuh, Boris V Skryabin, Kiavash Movahedi, Frank Schweda, Michaela Kuhn
Background -Peripheral vascular resistance has a major impact on arterial blood pressure levels. Endothelial C-type natriuretic peptide (CNP) participates in the local regulation of vascular tone but the target cells remain controversial. The cGMP-producing guanylyl cyclase-B (GC-B) receptor for CNP is expressed in vascular smooth muscle cells (VSMC). However, whereas endothelial cell-specific CNP knockout mice are hypertensive, mice with deletion of GC-B in VSMC have unaltered blood pressure. Methods -We analyzed whether the vasodilating response to CNP changes along the vascular tree, i...
April 6, 2018: Circulation
https://www.readbyqxmd.com/read/29623692/daily-muscle-stretching-enhances-blood-flow-endothelial-function-capillarity-vascular-volume-and-connectivity-in-aged-skeletal-muscle
#7
Kazuki Hotta, Bradley J Behnke, Bahram Arjmandi, Payal Ghosh, Bei Chen, Rachael Brooks, Joshua J Maraj, Marcus L Elam, Patrick Maher, Daniel Kurien, Alexandra Churchill, Jaime L Sepulveda, Max B Kabolowsky, Demetra D Christou, Judy M Muller-Delp
KEY POINTS: In aged rats, daily muscle stretching increases blood flow to skeletal muscle during exercise. Daily muscle stretching enhanced endothelium-dependent vasodilatation of skeletal muscle resistance arterioles of aged rats. Angiogenic markers and capillarity increased in response to daily stretching in muscles of aged rats. Muscle stretching performed with a splint could provide a feasible means of improving muscle blood flow and function in elderly patients who cannot perform regular aerobic exercise...
April 5, 2018: Journal of Physiology
https://www.readbyqxmd.com/read/29622448/long-term-prognostic-value-of-invasive-and-non-invasive-measures-early-after-heart-transplantation
#8
Yukari Kobayashi, Yuhei Kobayashi, Hyoung-Mo Yang, Sara Bouajila, Helen Luikart, Takeshi Nishi, Dong-Hyun Choi, Ingela Schnittger, Hannah A Valantine, Kiran K Khush, Alan C Y Yeung, Francois Haddad, William F Fearon
BACKGROUND: Invasively assessed coronary microvascular resistance early after heart transplantation predicts worse long-term outcome; however, little is known about the relationship between microvascular resistance, left ventricular function and outcomes in this setting. METHODS: A total of 100 cardiac transplant recipients had fractional flow reserve (FFR) and the index of microcirculatory resistance (IMR) measured in the left anterior descending artery and echocardiographic assessment of left ventricular ejection fraction (LVEF) and global longitudinal strain (GLS) at 1 year after heart transplantation...
June 1, 2018: International Journal of Cardiology
https://www.readbyqxmd.com/read/29617404/angiogenic-role-of-mir-20a-in-breast-cancer
#9
Gines Luengo-Gil, Enrique Gonzalez-Billalabeitia, Sergio Alejo Perez-Henarejos, Esther Navarro Manzano, Asuncion Chaves-Benito, Elena Garcia-Martinez, Elisa Garcia-Garre, Vicente Vicente, Francisco Ayala de la Peña
BACKGROUND: Angiogenesis is a key process for tumor progression and a target for treatment. However, the regulation of breast cancer angiogenesis and its relevance for clinical resistance to antiangiogenic drugs is still incompletely understood. Recent developments on the contribution of microRNA to tumor angiogenesis and on the oncogenic effects of miR-17-92, a miRNA cluster, point to their potential role on breast cancer angiogenesis. The aim of this work was to establish the contribution of miR-20a, a member of miR-17-92 cluster, to tumor angiogenesis in patients with invasive breast carcinoma...
2018: PloS One
https://www.readbyqxmd.com/read/29616222/does-a-better-perfusion-of-deconditioned-muscle-tissue-release-chronic-low-back-pain
#10
Paola Valdivieso, Martino V Franchi, Christian Gerber, Martin Flück
Non-specific chronic low back pain (nsCLBP) is a multifactorial condition of unknown etiology and pathogenesis. Physical and genetic factors may influence the predisposition of individuals to CLBP, which in many instances share a musculoskeletal origin. A reduced pain level in low back pain patients that participate in exercise therapy highlights that disuse-related muscle deconditioning may predispose individuals to nsCLBP. In this context, musculoskeletal pain may be the consequence of capillary rarefaction in inactive muscle as this would lower local tissue drainage and washing out of toxic waste...
2018: Frontiers in Medicine
https://www.readbyqxmd.com/read/29615068/modeling-and-rescue-of-defective-blood-brain-barrier-function-of-induced-brain-microvascular-endothelial-cells-from-childhood-cerebral-adrenoleukodystrophy-patients
#11
Catherine A A Lee, Hannah S Seo, Anibal G Armien, Frank S Bates, Jakub Tolar, Samira M Azarin
BACKGROUND: X-linked adrenoleukodystrophy (X-ALD) is caused by mutations in the ABCD1 gene. 40% of X-ALD patients will convert to the deadly childhood cerebral form (ccALD) characterized by increased permeability of the brain endothelium that constitutes the blood-brain barrier (BBB). Mutation information and molecular markers investigated to date are not predictive of conversion. Prior reports have focused on toxic metabolic byproducts and reactive oxygen species as instigators of cerebral inflammation and subsequent immune cell invasion leading to BBB breakdown...
April 4, 2018: Fluids and Barriers of the CNS
https://www.readbyqxmd.com/read/29614647/reduced-cerebrovascular-reserve-capacity-as-a-biomarker-of-microangiopathy-in-alzheimer-s-disease-and-mild-cognitive-impairment
#12
Barbora Soukupova Urbanova, Jaroslava Paulasova Schwabova, Hana Magerova, Petr Jansky, Hana Markova, Martin Vyhnalek, Jan Laczo, Jakub Hort, Ales Tomek
BACKGROUND: Cerebral microangiopathy in Alzheimer's disease (AD) causes chronic hypoperfusion and probably accelerates neurodegenerative changes. OBJECTIVE: We hypothesize microvascular impairment could be present already in mild cognitive impairment (MCI) and can be revealed using transcranial color-coded sonography (TCCS) and the breath-holding maneuver. METHODS: Three groups of subjects (AD in the stage of dementia, MCI, and cognitively normal controls) with detailed neuropsychological testing and low cerebrovascular burden (no history of stroke, no intra- or extracranial artery stenoses, and no severe vascular lesions on brain MRI), underwent a TCCS assessment of peak systolic (PSV), mean flow (MFV), and end diastolic velocities (EDV) and resistance and pulsatility indices (RI, PI) in large intracranial vessels bilaterally...
March 24, 2018: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29614585/-coronary-microvascular-resistance-and-its-relevant-factors-in-patients-with-moderate-coronary-stenosis-and-chest-pain
#13
D F He, M Y Liu, L J Zhang, C J Guo, Y P Chi, L Zhao, X J Zhang
Objective: To evaluate the impact of cardiovascular risk factors on index of microvascular resistance (IMR) and coronary flow reserve (CFR) and to explore the characteristics of IMR and CFR and the relationship between IMR and angiographic features in patients with intermediate coronary stenosis and chest pain. Methods: Fractional flow reserve (FFR), CFR, and IMR were measured in patients who underwent invasive coronary angiography with 40%-70% stenosis by visual assessment. All patients with FFR>0.75 were enrolled and grouped with the cut-off points of IMR≥25 and CFR≤2...
April 1, 2018: Zhonghua Nei Ke za Zhi [Chinese Journal of Internal Medicine]
https://www.readbyqxmd.com/read/29605246/influence-of-local-myocardial-damage-on-index-of-microcirculatory-resistance-and-fractional-flow-reserve-in-target-and-nontarget-vascular-territories-in-a-porcine-microvascular-injury-model
#14
Joo Myung Lee, Hyun Kuk Kim, Kyung Seob Lim, Jun-Kyu Park, Ki Hong Choi, Jonghanne Park, Doyeon Hwang, Tae-Min Rhee, Jeong Hoon Yang, Eun-Seok Shin, Chang-Wook Nam, Joon-Hyung Doh, Joo-Yong Hahn, Bon-Kwon Koo, Myung Ho Jeong
OBJECTIVES: The aim of this study was to investigate the influence of microvascular damage in one vessel territory on invasively measured physiological parameters in the other vessel, using a porcine microvascular damage model. BACKGROUND: Although fractional flow reserve (FFR)-guided decision-making for the nonculprit stenosis in patients with acute myocardial infarction has been reported to be better than angiography-guided revascularization, there have been debates regarding the influence of microvascular dysfunction on measured FFR in nonculprit vessels...
March 22, 2018: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/29598865/pet-assessment-of-epicardial-intimal-disease-and-microvascular-dysfunction-in-cardiac-allograft-vasculopathy
#15
Sharon Chih, Aun Yeong Chong, Fernanda Erthal, Robert A deKemp, Ross A Davies, Ellamae Stadnick, Derek Y So, Christopher Overgaard, George Wells, Lisa M Mielniczuk, Rob S B Beanlands
BACKGROUND: Cardiac allograft vasculopathy (CAV) is a leading cause of graft failure and death after heart transplantation. Absolute myocardial blood flow (MBF) quantification using rubidium 82 (Rb-82) positron emission tomography (PET) could enable evaluation of diagnostically challenging diffuse epicardial and microvascular disease in CAV. OBJECTIVES: The authors aimed to evaluate Rb-82 PET detection of CAV. METHODS: Consecutive transplant recipients undergoing coronary angiography were prospectively evaluated with PET, multivessel intravascular ultrasound (IVUS), and intracoronary hemodynamics...
April 3, 2018: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/29593574/the-use-of-biophysical-flow-models-in-the-surgical-management-of-patients-affected-by-chronic-thromboembolic-pulmonary-hypertension
#16
Martina Spazzapan, Priya Sastry, John Dunning, David Nordsletten, Adelaide de Vecchi
Introduction: Chronic Thromboembolic Pulmonary Hypertension (CTEPH) results from progressive thrombotic occlusion of the pulmonary arteries. It is treated by surgical removal of the occlusion, with success rates depending on the degree of microvascular remodeling. Surgical eligibility is influenced by the contributions of both the thrombus occlusion and microvasculature remodeling to the overall vascular resistance. Assessing this is challenging due to the high inter-individual variability in arterial morphology and physiology...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29578964/comparison-between-invasive-and-noninvasive-techniques-of-evaluation-of-microvascular-structural-alterations
#17
Carolina De Ciuceis, Claudia Agabiti Rosei, Stefano Caletti, Valentina Trapletti, Maria A Coschignano, Guido A M Tiberio, Sarah Duse, Franco Docchio, Simone Pasinetti, Federica Zambonardi, Francesco Semeraro, Enzo Porteri, Leonardo Solaini, Giovanna Sansoni, Paola Pileri, Claudia Rossini, Francesco Mittempergher, Nazario Portolani, Silvia Ministrini, Enrico Agabiti-Rosei, Damiano Rizzoni
BACKGROUND: The evaluation of the morphological characteristics of small resistance arteries in humans is challenging. The gold standard method is generally considered to be the measurement by wire or pressure micromyography of the media-to-lumen ratio of subcutaneous small vessels obtained by local biopsies. However, noninvasive techniques for the evaluation of retinal arterioles were recently proposed; in particular, two approaches, scanning laser Doppler flowmetry (SLDF) and adaptive optics, seem to provide useful information; both of them provide an estimation of the wall-to-lumen ratio (WLR) of retinal arterioles...
May 2018: Journal of Hypertension
https://www.readbyqxmd.com/read/29578039/in-vivo-assessment-of-the-human-cerebral-microcirculation-and-its-glycocalyx-a-technical-report
#18
R H L Haeren, K Rijkers, O E M G Schijns, J Dings, G Hoogland, M A M J van Zandvoort, H Vink, J J van Overbeeke
INTRODUCTION: The cerebral microcirculation and its glycocalyx, a matrix coating the luminal endothelium, are key regulators of capillary permeability and cerebral blood flow. Microvascular abnormalities are described in several neurological disorders. However, assessment of the cerebral microcirculation and glycocalyx has mainly been performed ex vivo. NEW METHOD: Here, the technical feasibility of in vivo assessment of the human cerebral microcirculation and its glycocalyx using sidestream dark field (SDF) imaging is discussed...
March 22, 2018: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/29577857/erythropoietin-protects-retina-against-ceramide-2-induced-damage-in-rat
#19
H Lou, D Kang, Q Yang, C Lian, C Zhang, Z Li, H Tian, L Lu, G-T Xu, G Xu, J Zhang
Ceramide plays critical roles in cell proliferation, senescence and apoptosis, and is implicated in neurodegenerative diseases, etc. To clarify if ceramide plays some roles in retinal diseases, we established in vivo and in vitro retinal injury models with ceramide 2 (C2) treatment. In addition, Erythropoietin (EPO), which showed protective effects on retinal cells and blood-retinal barrier (BRB), was also tested for its protection and possible mechanism(s) in these models. The results showed that intravitreal C2-treatment caused significant vision loss in rats, as reflected by reduced b-wave amplitude, and increased TUNEL positive cells and GFAP immunostaining in retina...
March 22, 2018: Current Molecular Medicine
https://www.readbyqxmd.com/read/29577514/gene-expression-profiles-of-ion-channels-and-receptors-in-mouse-resistance-arteries-effects-of-cell-type-vascular-bed-and-age
#20
Erika M Boerman, Sen Sidharth, Rebecca L Shaw, Trupti Joshi, Steven S Segal
OBJECTIVE: Receptors and ion channels of smooth muscle cells (SMCs) and endothelial cells (ECs) are integral to the regulation of vessel diameter and tissue blood flow. Physiological roles of ion channels and receptors in skeletal muscle and mesenteric arteries have been identified however their gene expression profiles are undefined. We tested the hypothesis that expression profiles for ion channels and receptors governing vascular reactivity vary with cell type, vascular bed and age...
March 25, 2018: Microcirculation: the Official Journal of the Microcirculatory Society, Inc
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