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Microvascular function

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https://www.readbyqxmd.com/read/29333924/dynamic-mr-imaging-for-functional-vascularization-depends-on-tissue-factor-signaling-in-glioblastoma
#1
Xiao Chen, Tian Xie, Jingqin Fang, Wei Xue, Houyi Kang, Haipeng Tong, Yu Guo, Bo Zhang, Sumei Wang, Yizeng Yang, Weiguo Zhang
Glomeruloid vascular proliferation (GVP) is a diagnostic hallmark and links to aggressive behavior, therapy resistance and poor prognosis in glioblastoma (GBM). It lacks clinical approaches to predict and monitor its formation and dynamic change. Yet the mechanism of GVPs also remains largely unknown. Using an in situ GBM xenograft mouse model, combined clinical MRI images of pre-surgery tumor and pathological investigation, we demonstrated that the inhibition of tissue factor (TF) decreased GVPs in Mouse GBM xenograft model...
January 15, 2018: Cancer Biology & Therapy
https://www.readbyqxmd.com/read/29333218/impact-of-mindfulness-based-stress-reduction-therapy-on-myocardial-function-and-endothelial-dysfunction-in-female-patients-with-microvascular-angina
#2
Bong Joon Kim, In Suk Cho, Kyoung Im Cho
Background: Mindfulness-based stress reduction (MBSR) is a structured group program that employs mindfulness meditation to alleviate suffering associated with physical, psychosomatic, and psychiatric disorders. In this study, we investigate the impact of MBSR on left ventricular (LV) and endothelial function in female patients with microvascular angina. Methods: A total of 34 female patients (mean age 52.2 ± 13.8 years) diagnosed with microvascular angina underwent a MBSR program with anti-anginal medication for 8 weeks...
December 2017: Journal of Cardiovascular Ultrasound
https://www.readbyqxmd.com/read/29331396/autophagy-in-ischemic-stroke
#3
REVIEW
Pei Wang, Bo-Zong Shao, Zhiqiang Deng, Shi Chen, Zhenyu Yue, Chao-Yu Miao
Autophagy is a self-eating cellular catabolic pathway, through which long-lived proteins, damaged organelles and misfolded proteins are degraded and recycled for the maintenance of cellular homeostasis and normal cellular functions. Autophagy plays an important homeostatic role in the regulation of cell survival. Accumulating evidence shows that autophagy is activated in various cell types in the brain such as neurons, glia cells, and brain microvascular cells upon ischemic stroke. However, the exact role and molecular mechanisms of autophagy process that is implicated in ischemic stroke have yet to be elucidated...
January 10, 2018: Progress in Neurobiology
https://www.readbyqxmd.com/read/29329415/establishment-of-a-three-dimensional-model-to-study-human-uterine-angiogenesis
#4
Camille L Duran, Colette A Abbey, Kayla J Bayless
STUDY QUESTION: Can primary human uterine microvascular endothelial cells (UtMVECs) be used as a model to study uterine angiogenic responses in vitro that are relevant in pregnancy? SUMMARY ANSWER: UtMVECs demonstrated angiogenic responses when stimulated with proangiogenic factors, including sphingosine 1-phosphate (S1P), vascular endothelial growth factor (VEGF), basic fibroblast growth factor (bFGF), physiological levels of wall shear stress (WSS), human chorionic gonadotropin (hCG) and various combinations of estrogen and progesterone...
December 21, 2017: Molecular Human Reproduction
https://www.readbyqxmd.com/read/29322004/thoughts-modulate-the-expression-of-inflammatory-genes-and-may-improve-the-coronary-blood-flow-in-patients-after-a-myocardial-infarction
#5
Carlo Dal Lin, Mariela Marinova, Giorgio Rubino, Elisabetta Gola, Alessandra Brocca, Giorgia Pantano, Laura Brugnolo, Cristiano Sarais, Umberto Cucchini, Biancarosa Volpe, Chiara Cavalli, Maura Bellio, Emilia Fiorello, Sofia Scali, Mario Plebani, Sabino Iliceto, Francesco Tona
Background: Mental stress is one of the main risk factors for cardiovascular disease. Meditation and music listening are two techniques that are able to counteract it through the activation of specific brain areas, eliciting the so-called Relaxing Response (RR). Epidemiological evidence reveals that the RR practice has a beneficial prognostic impact on patients after myocardial infarction. We aimed to study the possible molecular mechanisms of RR underlying these findings. Methods: We enrolled 30 consecutive patients after myocardial infarction and 10 healthy controls...
January 2018: Journal of Traditional and Complementary Medicine
https://www.readbyqxmd.com/read/29316137/have-we-really-demonstrated-the-cardiovascular-safety-of-antihyperglycemic-drugs-rethinking-the-concepts-of-macrovascular-and-microvascular-disease-in-type-2-diabetes
#6
REVIEW
Milton Packer
A primary goal of the treatment of type 2 mellitus is the prevention of morbidity and mortality due to cardiovascular disease. However, antihyperglycemic drugs have the capacity to cause deleterious effects on the circulation, a risk that is not adequately reflected by the endpoints selected for emphasis in large-scale clinical trials that are designed to evaluate cardiovascular safety. The primary endpoint of the large-scale studies mandated by regulatory authorities focuses only on 3-4 events that depict only a limited view of the circulatory system...
January 5, 2018: Diabetes, Obesity & Metabolism
https://www.readbyqxmd.com/read/29315085/biopsy-confirmed-endothelial-cell-activation-in-patients-with-coronary-microvascular-dysfunction
#7
Hannes Lindemann, Ivana Petrovic, Stephan Hill, Anastasios Athanasiadis, Heiko Mahrholdt, Tim Schäufele, Karin Klingel, Udo Sechtem, Peter Ong
BACKGROUND: Patients with angina yet having unobstructed coronaries are found in ∼50% of cases undergoing invasive angiography. Coronary spasm and microvascular dysfunction can be responsible for the clinical presentation in ∼60% of cases. However, little is known about structural changes in the myocardium. The aim of this study was to describe findings in endomyocardial biopsies of symptomatic patients with unobstructed coronaries. PATIENTS AND METHODS: We retrospectively analyzed a cohort of 1416 consecutive patients who underwent endomyocardial biopsy sampling and coronary angiography between 2002 and 2016 for various clinical indications...
January 8, 2018: Coronary Artery Disease
https://www.readbyqxmd.com/read/29314204/telmisartan-ameliorates-vascular-endothelial-dysfunction-in-coronary-slow-flow-phenomenon-csfp
#8
Zhe Jin, Qindong Tan, Bei Sun
Coronary slow flow phenomenon (CSFP) is a coronary microvascular disorder with an increasing morbidity, and currently, available therapies are of limited clinical value for its cure. Hence, it is urgent to find a novel approach to CSFP treatment. Several studies show that endothelial dysfunction plays a critical role in the aetiology of CSFP. Telmisartan (TMST) is a clinically available anti-hypertensive medicine and has shown its potential properties for improving vascular endothelial function. Thus, we aimed to investigate the effect of TMST on endothelial dysfunction in CSFP, Endothelial-dependent flow-mediated vasodilation, serum levels of nitric oxide, adiponectin, and endothelin-1 were surveyed before and after 3 months of TMST treatment...
January 2018: Cell Biochemistry and Function
https://www.readbyqxmd.com/read/29313304/essential-hypertension-and-functional-microvascular-ageing
#9
REVIEW
Rosa Maria Bruno, Stefano Masi, Marco Taddei, Stefano Taddei, Agostino Virdis
In healthy conditions, the endothelium plays a pivotal role in maintaining vascular homeostasis, mainly by the production of the relaxing factor nitric oxide (NO), which protects the vessel wall from those mechanisms favouring the development of vascular atherosclerosis. Aging is a powerful cardiovascular risk factors associated with endothelial dysfunction. In details, an alteration in the NO substrate L-arginine is the major factor responsible for endothelial dysfunction with advancing age, while reactive oxygen species (ROS) excess generation, which in turn reduce NO availability, plays a role in oldest individuals only...
January 9, 2018: High Blood Pressure & Cardiovascular Prevention: the Official Journal of the Italian Society of Hypertension
https://www.readbyqxmd.com/read/29311686/preclinical-longitudinal-imaging-of-tumor-microvascular-radiobiological-response-with-functional-optical-coherence-tomography
#10
Valentin Demidov, Azusa Maeda, Mitsuro Sugita, Victoria Madge, Siddharth Sadanand, Costel Flueraru, I Alex Vitkin
Radiation therapy (RT) is widely used for cancer treatment, alone or in combination with other therapies. Recent RT advances have revived interest in delivering higher dose in fewer fractions, which may invoke both cellular and microvascular damage mechanisms. Microvasculature may thus be a potentially sensitive functional biomarker of RT early response, especially for such emerging RT treatments. However it is difficult to measure directly and non-invasively, and its time course, dose dependencies, and overall importance in tumor control are unclear...
January 8, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29307093/vasodilator-function-worsens-after-cessation-of-tumour-necrosis-factor-inhibitor-therapy-in-patients-with-rheumatoid-arthritis-only-if-a-flare-occurs
#11
Gerard A Rongen, Iris van Ingen, Marc Kok, Harald Vonkeman, Matthijs Janssen, Tim L Jansen
Vasodilator function is reported to be reduced in rheumatoid arthritis (RA), and is considered an early sign of vascular dysfunction, which is normalised by TNF inhibitors (TNFi). To optimise cost-effectiveness, tapering or interruption of TNFi therapy in established RA patients is advocated. We explored whether cessation of TNFi results in impaired vasodilator function and whether this relates to the development of a Disease Activity Score (DAS28)-based flare. Forty-one patients were assessed for eligibility as RA with at least 12 months of low disease activity (based on 28 joint counts); 35 enrolled into the randomised study: 8 were randomised to continue, 27 to stopping TNFi...
January 7, 2018: Clinical Rheumatology
https://www.readbyqxmd.com/read/29306791/empagliflozin-rescues-diabetic-myocardial-microvascular-injury-via-ampk-mediated-inhibition-of-mitochondrial-fission
#12
Hao Zhou, Shuyi Wang, Pingjun Zhu, Shunying Hu, Yundai Chen, Jun Ren
Impaired cardiac microvascular function contributes to diabetic cardiovascular complications although effective therapy remains elusive. Empagliflozin, a sodium-glucose cotransporter 2 (SGLT2) inhibitor recently approved for treatment of type 2 diabetes, promotes glycosuria excretion and offers cardioprotective actions beyond its glucose-lowering effects. This study was designed to evaluate the effect of empagliflozin on cardiac microvascular injury in diabetes and the underlying mechanism involved with a focus on mitochondria...
December 30, 2017: Redox Biology
https://www.readbyqxmd.com/read/29305878/study-of-microvascular-non-newtonian-blood-flow-modulated-by-electroosmosis
#13
Dharmendra Tripathi, Ashu Yadav, O Anwar Bég, Rakesh Kumar
An analytical study of microvascular non-Newtonian blood flow is investigated in presence of electro-osmosis phenomenon. Blood is considered as a Bingham rheological aqueous ionic solutions. An externally applied static axial electrical field is imposed on the system. The Poisson-Boltzmann equation for electric potential distribution is implemented to accommodate the electrical double layer in the microvascular. With long wavelength, lubrication and Debye-Hückel approximations, the boundary value problem is rendered non-dimensional...
January 3, 2018: Microvascular Research
https://www.readbyqxmd.com/read/29305678/the-role-of-adipose-derived-stem-cells-in-a-self-organizing-3d-model-with-regard-to-human-soft-tissue-healing
#14
Martin Oberringer, Monika Bubel, Martina Jennewein, Silke Guthörl, Tamara Morsch, Sophie Bachmann, Wolfgang Metzger, Tim Pohlemann
The clinical phenomenon of inadequate soft tissue healing still remains an important issue. The occurrence of chronic wounds is correlated to the life span, which is still increasing in western countries. Tissue engineering products containing adipose-derived stem cells are discussed as a promising therapeutic approach. Several studies confirmed the value of these cells for soft tissue healing improvement, suggesting a paracrine as well as a direct effect on vessel repair and angiogenesis. In an attempt to figure out specific effects of adipose-derived stem cells on dermal microvascular endothelial cells with respect to the different phases of soft tissue healing, we designed a 3D in vitro model on the basis of spheroids...
January 5, 2018: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/29303857/reconstruction-of-a-compound-oromandibular-defect-by-means-of-chimeric-scapular-parascapular-free-flap-assisted-by-virtual-surgical-planning
#15
Josué Hernando, Antonio Aguilar-Salvatierra, Ignacio Osoitz Leizaola-Cardesa, Juan Antonio Rad, Amaya Vicuña, Rafael Gómez, Javier Martín, Gerardo Gómez-Moreno
BACKGROUND: Reconstruction of an oromandibular defect presents a considerable surgical challenge. But since the advent of microvascularized free flap reconstructive surgery, outcomes have improved significantly so that today almost any defect may be reconstructed. Recently, virtual surgical planning has reduced surgical time, the morbidity associated with surgery, and surgical precision. OBJECTIVE: This article reports a complex patient with a composite oromandibular defect...
January 4, 2018: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29298188/sphingosine-kinase-1-regulates-inflammation-and-contributes-to-acute-lung-injury-in-pneumococcal-pneumonia-via-the-sphingosine-1-phosphate-receptor-2
#16
Birgitt Gutbier, Stefanie M Schönrock, Carolin Ehrler, Rainer Haberberger, Kristina Dietert, Achim D Gruber, Wolfgang Kummer, Laura Michalick, Wolfgang M Kuebler, Andreas C Hocke, Kolja Szymanski, Eleftheria Letsiou, Anja Lüth, Fabian Schumacher, Burkhard Kleuser, Timothy J Mitchell, Wilhelm Bertrams, Bernd Schmeck, Denise Treue, Frederick Klauschen, Torsten T Bauer, Mario Tönnies, Norbert Weissmann, Stefan Hippenstiel, Norbert Suttorp, Martin Witzenrath
OBJECTIVES: Severe pneumonia may evoke acute lung injury, and sphingosine-1-phosphate is involved in the regulation of vascular permeability and immune responses. However, the role of sphingosine-1-phosphate and the sphingosine-1-phosphate producing sphingosine kinase 1 in pneumonia remains elusive. We examined the role of the sphingosine-1-phosphate system in regulating pulmonary vascular barrier function in bacterial pneumonia. DESIGN: Controlled, in vitro, ex vivo, and in vivo laboratory study...
January 2, 2018: Critical Care Medicine
https://www.readbyqxmd.com/read/29296932/not-just-a-marker-cd34-on-human-hematopoietic-stem-progenitor-cells-dominates-vascular-selectin-binding-along-with-cd44
#17
Dina B AbuSamra, Fajr A Aleisa, Asma S Al-Amoodi, Heba M Jalal Ahmed, Chee Jia Chin, Ayman F Abuelela, Ptissam Bergam, Rachid Sougrat, Jasmeen S Merzaban
CD34 is routinely used to identify and isolate human hematopoietic stem/progenitor cells (HSPCs) for use clinically in bone marrow transplantation, but its function on these cells remains elusive. Glycoprotein ligands on HSPCs help guide their migration to specialized microvascular beds in the bone marrow that express vascular selectins (E- and P-selectin). Here, we show that HSPC-enriched fractions from human hematopoietic tissue expressing CD34 (CD34pos) bound selectins, whereas those lacking CD34 (CD34neg) did not...
December 26, 2017: Blood Advances
https://www.readbyqxmd.com/read/29296764/antiangiogenic-effects-of-decorin-restored-by-unfractionated-low-molecular-weight-and-nonanticoagulant-heparins
#18
Amy K L Chui, Tilini N Gunatillake, Vera Ignjatovic, Paul T Monagle, Padma Murthi, Shaun P Brennecke, John M Whitelock, Joanne M Said
Pregnancies affected by preeclampsia (PE) or fetal growth restriction (FGR) display increases in thrombin generation and reductions in angiogenesis and cell growth. There is significant interest in the potential for low molecular weight heparins (LMWHs) to reduce the recurrence of PE and FGR. However, LMWH is associated with an increased risk of bleeding. Therefore, it is of vital importance to determine the exact molecular function of heparins in pregnancy if they are used as therapy for pregnant women. We aimed to determine this using our model for PE/FGR in microvascular endothelial cells...
July 11, 2017: Blood Advances
https://www.readbyqxmd.com/read/29296475/automated-detection-of-photoreceptor-disruption-in-mild-diabetic-retinopathy-on-volumetric-optical-coherence-tomography
#19
Zhuo Wang, Acner Camino, Miao Zhang, Jie Wang, Thomas S Hwang, David J Wilson, David Huang, Dengwang Li, Yali Jia
Diabetic retinopathy is a pathology where microvascular circulation abnormalities ultimately result in photoreceptor disruption and, consequently, permanent loss of vision. Here, we developed a method that automatically detects photoreceptor disruption in mild diabetic retinopathy by mapping ellipsoid zone reflectance abnormalities from en face optical coherence tomography images. The algorithm uses a fuzzy c-means scheme with a redefined membership function to assign a defect severity level on each pixel and generate a probability map of defect category affiliation...
December 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/29288289/anterolateral-thigh-flap-combined-with-reconstruction-plate-versus-double-free-flaps-for-composite-mandibular-reconstruction-a-propensity-score-matched-study
#20
Anaeze C Offodile, Jennifer An-Jou Lin, Kai-Ping Chang, Mohamed Abdelrahman, Hao-Wei Kou, Charles Yuen Yung Loh, Mario A Aycart, Huang-Kai Kao
OBJECTIVE: This study was designed to examine the comparative effectiveness of oromandibular defect reconstruction via anterolateral thigh flap and bridging plate (ALT only) versus simultaneous soft tissue and vascularized bone flap (DFF), with regards to long-term plate exposure and complications. METHODS: A propensity score-matched analysis of patients with an oncologic head and neck defect who underwent microvascular reconstruction was performed. Two surgical groups, i...
December 30, 2017: Annals of Surgical Oncology
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