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Vascular reactivity

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https://www.readbyqxmd.com/read/29457148/platelets-at-the-vascular-interface
#1
Wolfgang Bergmeier, Lucia Stefanini
In this brief review paper, we will summarize the State-of-the-Art on how platelet reactivity is regulated in circulation and at sites of vascular injury. Our review discusses recent and ongoing work, presented at this year's International Society on Thrombosis and Haemostasis (ISTH) meeting, on the role of platelets in (1) classical hemostasis at sites of mechanical injury, and (2) the maintenance of vascular integrity at sites of inflammation.
January 2018: Research and Practice in Thrombosis and Haemostasis
https://www.readbyqxmd.com/read/29455203/absence-of-nicotinamide-nucleotide-transhydrogenase-in-c57bl-6j-mice-exacerbates-experimental-atherosclerosis
#2
Aimee E Vozenilek, Matthew Vetkoetter, Jonette M Green, Xinggui Shen, James G Traylor, Ronald L Klein, A Wayne Orr, Matthew D Woolard, David M Krzywanski
BACKGROUND: Mitochondrial reactive oxygen species (ROS) contribute to inflammation and vascular remodeling during atherosclerotic plaque formation. C57BL/6N (6N) and C57BL/6J (6J) mice display distinct mitochondrial redox balance due to the absence of nicotinamide nucleotide transhydrogenase (NNT) in 6J mice. We hypothesize that differential NNT expression between these animals alters plaque development. METHODS: 6N and 6J mice were treated with AAV8-PCSK9 (adeno-associated virus serotype 8/proprotein convertase subtilisin/kexin type 9) virus leading to hypercholesterolemia, increased low-density lipoprotein, and atherosclerosis in mice fed a high-fat diet (HFD)...
February 16, 2018: Journal of Vascular Research
https://www.readbyqxmd.com/read/29454617/antihypertensive-potential-of-linalool-and-linalool-complexed-with-%C3%AE-cyclodextrin-effects-of-subchronic-treatment-on-blood-pressure-and-vascular-reactivity
#3
Samuel Barbosa Camargo, Letícia Oliveira Simões, Carla Fiama de Azevedo Medeiros, Anderson de Melo Jesus, Josmara Bartolomei Fregoneze, Afrânio Evangelista, Cristiane Flora Villarreal, Adriano Antunes de Souza Araújo, Lucindo José Quintans-Júnior, Darizy Flavia Silva
Linalool (LIN) is a monoterpene alcohol present in some aromatic medicinal plants with biological activities that can impact cardiovascular diseases. This chemical class is highly volatile and β-cyclodextrin (β-CD) has been employed to improve the pharmacological properties of monoterpenes. Thus, the aim of this study was to evaluate the cardiovascular effects of LIN free focusing on the antihypertensive properties of this monoterpene and to study whether LIN, complexed in β-cyclodextrin (LIN-βCD) is able to improve the pharmacological activity of LIN...
February 15, 2018: Biochemical Pharmacology
https://www.readbyqxmd.com/read/29452601/reactive-hyperemia-index-rhi-and-cognitive-performance-indexes-are-associated-with-histologic-markers-of-liver-disease-in-subjects-with-non-alcoholic-fatty-liver-disease-nafld-a-case-control-study
#4
Antonino Tuttolomondo, Salvatore Petta, Alessandra Casuccio, Carlo Maida, Vittoriano Della Corte, Mario Daidone, Domenico Di Raimondo, Rosaria Pecoraro, Roberto Fonte, Anna Cirrincione, Rita Zafonte, Daniela Cabibi, Calogero Cammà, Vito Di Marco, Anna Licata, Franco Magliozzo, Giulio Marchesini, Giovanni Merlino, Antonio Craxì, Antonio Pinto
BACKGROUND: No study evaluated vascular health markers in subjects with non-alcoholic fatty liver disease (NAFLD) through a combined analysis of reactive hyperemia peripheral arterial tonometry (RH-PAT) and arterial stiffness indexes. AIM OF THE STUDY: We aimed to assess whether NAFLD and its histological severity are associated with impairment of arterial stiffness and RH-PAT indexes in a mixed cohort of patients with biopsy-proven NAFLD. MATERIALS AND METHODS: The Kleiner classification was used to grade NAFLD grade...
February 16, 2018: Cardiovascular Diabetology
https://www.readbyqxmd.com/read/29452265/characterizing-the-modulation-of-resting-state-fmri-metrics-by-baseline-physiology
#5
Powell P W Chu, Ali M Golestani, Jonathan B Kwinta, Yasha B Khatamian, J Jean Chen
The blood-oxygenation level dependent (BOLD) functional magnetic resonance imaging (fMRI) signal is commonly used to assess functional connectivity across brain regions, particularly in the resting state (rs-fMRI). However, the BOLD fMRI signal is not merely a representation of neural activity, but a combination of neural activity and vascular response. These aspects of the BOLD signal are easily influenced by systemic physiology, potentially biasing BOLD-based functional connectivity measurements. In this work, we focus on the following physiological modulators of the BOLD signal: cerebral blood flow (CBF), venous blood oxygenation, and cerebrovascular reactivity (CVR)...
February 13, 2018: NeuroImage
https://www.readbyqxmd.com/read/29451821/protection-from-vascular-dysfunction-in-female-rats-with-chronic-stress-and-depressive-symptoms
#6
Steven D Brooks, Stan Hileman, Paul D Chantler, Samantha Milde, Kent C Lemaster, Stephanie Frisbee, J Kevin Shoemaker, Dwayne N Jackson, Jefferson C Frisbee
The increasing prevalence and severity of clinical depression is strongly correlated with vascular disease risk, creating a comorbid condition with poor outcomes, although demonstrating a sexual disparity where females are at lower risk than males for subsequent cardiovascular events. To determine potential mechanisms responsible for this protection against stress/depression-induced vasculopathy in females, we exposed male and female ({plus minus}ovariectomy) rats to the unpredictable chronic mild stress (UCMS) model for 8 weeks and determined depressive symptom severity, vascular reactivity in aortic rings (AR) and ex vivo middle cerebral arteries (MCA), and determined the profile of major metabolites regulating vascular tone...
February 16, 2018: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/29451819/protection-from-chronic-stress-and-depressive-symptom-induced-vascular-endothelial-dysfunction-in-female-rats-is-abolished-by-pre-existing-metabolic-disease
#7
Steven D Brooks, Stan Hileman, Paul D Chantler, Samantha Milde, Kent C Lemaster, Stephanie Frisbee, J Kevin Shoemaker, Dwayne N Jackson, Jefferson C Frisbee
While it is known that chronic stress and clinical depression are powerful predictors of poor cardiovascular outcomes, recent clinical evidence has identified correlations between the development of metabolic disease and that for depressive symptoms; creating a combined condition of severely elevated cardiovascular disease risk. In this companion manuscript, we determine the impact of pre-existing metabolic disease on the relationship between chronic stress//depressive symptoms and vascular function, using the obese Zucker (OZR) and the unpredictable chronic mild stress UCMS models...
February 16, 2018: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/29450749/an-analysis-of-the-clinical-laboratory-and-histological-features-of-striped-punctate-and-nodular-gastric-antral-vascular-ectasia
#8
Arul Thomas, David Koch, William Marsteller, David Lewin, Adrian Reuben
BACKGROUND: Gastric antral vascular ectasia (GAVE) commonly presents as linear striped ("watermelon stomach") or punctate phenotypes, to which a newly discovered nodular form was recently added. AIMS: We performed a retrospective cohort study to detail and compare the clinical and histological characteristics of major GAVE phenotypes. METHODS: In 136 GAVE patients (tertiary care ambulatory and inpatient, median age 61.3 years, 73 men, and 63 women), clinical and laboratory results were recorded, with comorbidities, endoscopy indications, and complications of cirrhosis...
February 15, 2018: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/29448855/acute-effects-of-blood-flow-restriction-on-exercise-induced-free-radical-production-in-young-and-healthy-subjects
#9
Christoph Centner, Denise Zdzieblik, Patrick Dressler, Bruno Fink, Albert Gollhofer, Daniel König
The main purpose of this study was to investigate the acute local and systemic effects of low-load resistance exercise (30% 1RM) with partial vascular occlusion on exercise-induced free radical production and to compare these effects with other established training methods. Fifteen young and healthy males (25 ± 3 years) performed the following four sessions in a counterbalanced order on separate days: low-load resistance exercise (LI: 30% 1RM), low-load resistance exercise with blood flow restriction (LIBR: 30% 1RM), high-load resistance exercise (HI: 80% 1RM) and an additional session without exercise but blood flow restriction only (BR)...
February 16, 2018: Free Radical Research
https://www.readbyqxmd.com/read/29445571/immunoreactivity-of-wilms-tumor-1-wt1-as-an-additional-evidence-supporting-hemangiomatous-rather-than-inflammatory-origin-in-the-etiopathogenesis-of-angiolymphoid-hyperplasia-with-eosinophilia
#10
Fatma Tokat, Julia S Lehman, Engin Sezer, Emel Dikicioglu Cetin, Umit Ince, Emel Ozturk Durmaz
Background: Angiolymphoid hyperplasia with eosinophilia (ALHE) is a rare vascular proliferative disorder mainly located in the periauricular region. The etiopathogenesis of ALHE is unknown, and it is still controversial as to whether the entity represents a benign vascular neoplasm or an inflammatory process. Aim: Recently, the intracytoplasmic staining pattern of Wilms tumor 1 (WT1) on immunohistochemistry has highlighted true vascular neoplasms, such as microvenular hemangioma, tufted angioma, and spindle cell hemangioma, which has made it helpful to distinguish ALHE from vascular malformations, as there is a negative staining pattern in the other entities...
January 2018: Dermatology Practical & Conceptual
https://www.readbyqxmd.com/read/29445240/high-fat-diet-induced-metabolically-obese-and-normal-weight-rabbit-model-shows-early-vascular-dysfunction-mechanisms-involved
#11
Gabriela Alarcon, Julieta Roco, Mirta Medina, Analia Medina, Maria Peral, Susana Jerez
BACKGROUND: Obesity contributes significantly to the development and evolution of cardiovascular disease (CVD) which is believed to be mediated by oxidative stress, inflammation and endothelial dysfunction. However, the vascular health of metabolically obese and normal weight (MONW) individuals is not completely comprehended. OBJECTIVES: The purpose of our study was to evaluate vascular function on the basis of a high fat diet (HFD)-MONW rabbit model. SUBJECTS: Twenty four male rabbits were randomly assigned to receive either a regular diet (CD, n = 12) or a high-fat diet (18% extra fat on the regular diet, HFD, n = 12) for 6 weeks...
January 30, 2018: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/29445080/modeling-radiation-injury-induced-cell-death-and-countermeasure-drug-responses-in-a-human-gut-on-a-chip
#12
Sasan Jalili-Firoozinezhad, Rachelle Prantil-Baun, Amanda Jiang, Ratnakar Potla, Tadanori Mammoto, James C Weaver, Thomas C Ferrante, Hyun Jung Kim, Joaquim M S Cabral, Oren Levy, Donald E Ingber
Studies on human intestinal injury induced by acute exposure to γ-radiation commonly rely on use of animal models because culture systems do not faithfully mimic human intestinal physiology. Here we used a human Gut-on-a-Chip (Gut Chip) microfluidic device lined by human intestinal epithelial cells and vascular endothelial cells to model radiation injury and assess the efficacy of radiation countermeasure drugs in vitro. Exposure of the Gut Chip to γ-radiation resulted in increased generation of reactive oxygen species, cytotoxicity, apoptosis, and DNA fragmentation, as well as villus blunting, disruption of tight junctions, and compromise of intestinal barrier integrity...
February 14, 2018: Cell Death & Disease
https://www.readbyqxmd.com/read/29444372/primary-cutaneous-small-medium-sized-pleomorphic-t-cell-lymphoproliferative-disorder-shows-a-common-vascular-pattern-at-dermoscopy
#13
Alessandro Pileri, Claudio Agostinelli, Elena Sabattini, Michela Tabanelli, Valeria Gaspari, Miriam Leuzzi, Annalisa Patrizi, Francesco Savoia
Primary cutaneous small/medium-sized pleomorphic T-cell lymphoproliferative disorder (PCSM-TCLPD) is a rare and indolent primary cutaneous T-cell lymphoma variant [1], usually presenting as a solitary nodule or plaque in the head and neck [2] or rarely as multiple lesions in anatomic areas apart from head and neck [2]. Histology reveals the presence of a dense dermal infiltrate of CD4+, CD8-, small/medium pleomorphic cells [2] intermingled with reactive cells. Surgical or radiotherapic approach are the preferred option, while oral doxycycline has been suggested in cases with multiple lesions [2-3]...
February 14, 2018: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/29442454/higher-concentrations-of-osteoprotegerin-in-type-1-diabetic-patients-are-related-to-retinopathy-results-from-the-pozna%C3%A5-prospective-study
#14
Agata Grzelka, Dariusz Naskręt, Aleksandra Araszkiewicz, Aleksandra Uruska, Małgorzata Wegner, Dorota Zozulińska-Ziółkiewicz
BACKGROUND: Osteoprotegerin (OPG) is an arterial calcification marker which has been associated with vascular damage. Elevated OPG concentrations associated with low-grade inflammatory processes are found in diabetic subjects. OBJECTIVES: The aim of the study was to assess concentrations of OPG in relation to the presence of diabetic complications in patients with diabetes type 1 (DM 1) participating in the Poznań Prospective Study (PoProStu). MATERIAL AND METHODS: The study included 74 patients with DM1 (48 men) with a median age of 39 years (interquartile range [IQR]: 34-43) and a median 15-year history (IQR: 14-16) of diabetes, who were participants in the PoProStu...
December 2017: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
https://www.readbyqxmd.com/read/29441186/effects-of-different-modes-of-exercise-training-on-body-composition-and-risk-factors-for-cardiovascular-disease-in-middle-aged-men
#15
Hamid Reza Mohammadi, Mohammad Sadegh Khoshnam, Ebrahim Khoshnam
Background: Previous studies have indicated that exercise training improves body composition and cardiovascular disease risk factors. The aim of the present study was to investigate the effect of 12 weeks of aerobic, strength and combined training on body composition, intercellular adhesion molecule-1 (ICAM-1), vascular cell adhesion molecule-1 (VCAM-1), and C-reactive protein (CRP) in sedentary middle-aged men. Methods: Forty-seven male aged 40-60 years voluntarily participated in this study and were divided in four groups: aerobic ( n = 12), strength ( n = 12), combined ( n = 11), and control ( n = 12) groups randomly...
2018: International Journal of Preventive Medicine
https://www.readbyqxmd.com/read/29439446/the-t2238c-human-atrial-natriuretic-peptide-molecular-variant-and-the-risk-of-cardiovascular-diseases
#16
REVIEW
Speranza Rubattu, Sebastiano Sciarretta, Simona Marchitti, Franca Bianchi, Maurizio Forte, Massimo Volpe
Atrial natriuretic peptide (ANP) is a cardiac hormone which plays important functions to maintain cardio-renal homeostasis. The peptide structure is highly conserved among species. However, a few gene variants are known to fall within the human ANP gene. The variant rs5065 (T2238C) exerts the most substantial effects. The T to C transition at the 2238 position of the gene (13-23% allele frequency in the general population) leads to the production of a 30-, instead of 28-, amino-acid-long α-carboxy-terminal peptide...
February 11, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29439117/the-pericyte-glia-interface-at-the-blood-brain-barrier
#17
REVIEW
Patrizia Giannoni, Jerome Badaut, Cyril Dargazanli, Alexis Fayd'Herbe De Maudave, Wendy Klement, Vincent Costalat, Nicola Marchi
The cerebrovasculature is a multicellular structure with varying rheological and permeability properties. The outer wall of the brain capillary endothelium is enclosed by pericytes and astrocyte end feet, anatomically assembled to guarantee barrier functions. We, here, focus on the pericyte modifications occurring in disease conditions, reviewing evidence supporting the interplay amongst pericytes, the endothelium, and glial cells in health and pathology. Deconstruction and reactivity of pericytes and glial cells around the capillary endothelium occur in response to traumatic brain injury, epilepsy, and neurodegenerative disorders, impacting vascular permeability and participating in neuroinflammation...
February 14, 2018: Clinical Science (1979-)
https://www.readbyqxmd.com/read/29438871/red-cell-distribution-width-as-a-predictor-of-1-year-survival-in-ischemic-stroke-patients-treated-with-intravenous-thrombolysis
#18
João Pinho, Sofia Alexandra Marques, Eduardo Freitas, José Araújo, Mariana Taveira, José Nuno Alves, Carla Ferreira
INTRODUCTION: Red cell distribution width (RDW) has been found to be a prognostic marker in vascular diseases. Increased RDW predicted mortality and outcome after ischemic stroke however, the underlying mechanisms are unclear. Our study aimed to clarify the relation of RDW with stroke severity and 1-year survival. MATERIAL AND METHODS: Single-centre retrospective cohort study based on a prospective database of consecutive patients with acute anterior circulation ischemic stroke treated with intravenous thrombolysis (IVT) in a 9-year period...
February 7, 2018: Thrombosis Research
https://www.readbyqxmd.com/read/29437543/acute-copper-overload-induces-vascular-dysfunction-in-aortic-rings-due-to-endothelial-oxidative-stress-and-increased-nitric-oxide-production
#19
Karolini Zuqui Nunes, Mirian Fioresi, Vinicius Bermond Marques, Dalton Valentim Vassallo
The mechanisms involved in vascular reactivity alterations promoted by copper (Cu) overload were investigated. Thoracic aorta obtained from male Wistar rats were cut into rings and exposed for 1 h to 10 µg/ml Cu. Exposure to Cu decreased the contractile responses of aortic rings to phenylephrine (PHE). Removal of endothelium and subsequent administration of N-nitro-L arginine methyl ester (L-NAME), tetrahydrobiopterin, aminoguanidine, diethyldithiocarbamic acid, catalase, or tetraethylammonium increased contractile responses...
February 13, 2018: Journal of Toxicology and Environmental Health. Part A
https://www.readbyqxmd.com/read/29436019/melatonin-attenuates-homocysteine-induced-injury-in-human-umbilical-vein-endothelial-cells
#20
Azadeh Aminzadeh, Saeed Mehrzadi
Homocysteine (Hcy) is a major risk factor for vascular disease and is closely associated with endothelial dysfunction. Melatonin is a neurohormone that is mostly produced by the pineal gland. Studies have reported that melatonin exhibits neuroprotective effects in several neurodegenerative disorders. The aim of the current study was to investigate the possible protective effect of melatonin against Hcy-induced endothelial cell apoptosis in human umbilical vein endothelial cells (HUVECs) and to explore the underlying mechanisms...
February 13, 2018: Fundamental & Clinical Pharmacology
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