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Aortic stiffness

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https://www.readbyqxmd.com/read/29351482/suppression-of-gut-dysbiosis-reverses-western-diet-induced-vascular-dysfunction
#1
Micah L Battson, Dustin M Lee, Dillon K Jarrell, Shuofei Hou, Kayl E Ecton, Tiffany L Weir, Christopher L Gentile
OBJECTIVE: Vascular dysfunction represents a critical pre-clinical step in the development of cardiovascular disease. We examined the role of the gut microbiota in the development of obesity-related vascular dysfunction. Approach and Results. Male C57BL/6J mice were fed either a standard diet (SD) (n=12) or western diet (WD) (n=24) for 5m, after which time, WD mice were randomized to receive either un-supplemented drinking water or water containing a broad-spectrum antibiotic cocktail (WD+Abx) (n=12/group) for 2m...
December 26, 2017: American Journal of Physiology. Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29351429/removal-of-interscapular-brown-adipose-tissue-increases-aortic-stiffness-despite-normal-systemic-glucose-metabolism-in-mice
#2
Zachary Ian Grunewald, Nathan C Winn, Michelle L Gastecki, Makenzie L Woodford, James R Ball, Sarah A Hansen, Harold S Sacks, Victoria J Vieira-Potter, Jaume Padilla
Brown adipose tissue (BAT) is considered protective against obesity and related cardiometabolic dysfunction. Indeed, activation of BAT improves glucose homeostasis and attenuates cardiovascular disease development. However, whether a reduction in BAT mass perturbs metabolic function and increases risk for cardiovascular disease remains largely unknown. To address this question, C57BL/6J male mice underwent sham or surgical bilateral excision of interscapular BAT (iBATx) and were fed a normal chow or Western diet (WD) for 18 weeks, creating four groups (n=10/group)...
December 20, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/29349831/aortic-dysfunction-in-metabolic-syndrome-mediated-by-perivascular-adipose-tissue-tnf%C3%AE-and-nox2-dependent-pathway
#3
Evan DeVallance, Kayla W Branyan, Kent Lemaster, I Mark Olfert, David M Smith, Emidio E Pistilli, Jefferson C Frisbee, Paul D Chantler
AIMS: Perivascular adipose tissue (PVAT) is recognized for its vaso-active effects, however it's unclear how Metabolic Syndrome impact thoracic-aorta (t)PVAT and the subsequent effect on functional and structural aortic stiffness. METHODS & RESULTS: Thoracic aorta and tPVAT were removed from 16-17 week old lean (LZR, n = 16) and obese Zucker (OZR, n = 16) rats. OZR presented with aortic endothelial dysfunction, assessed by wire-myography, and increased aortic stiffness, assessed by elastic modulus...
January 18, 2018: Experimental Physiology
https://www.readbyqxmd.com/read/29338582/a-human-pericardium-biopolymeric-scaffold-for-autologous-heart-valve-tissue-engineering-cellular-and-extracellular-matrix-structure-and-biomechanical-properties-in-comparison-with-a-normal-aortic-heart-valve
#4
Frantisek Straka, David Schornik, Jaroslav Masin, Elena Filova, Tomas Mirejovsky, Zuzana Burdikova, Zdenek Svindrych, Hynek Chlup, Lukas Horny, Matej Daniel, Jiri Machac, Jelena Skibová, Jan Pirk, Lucie Bacakova
The objective of our study was to compare the cellular and extracellular matrix (ECM) structure and the biomechanical properties of human pericardium (HP) with the normal human aortic heart valve (NAV). HP tissues (from 12 patients) and NAV samples (from 5 patients) were harvested during heart surgery. The main cells in HP were pericardial interstitial cells (PICs), which are fibroblast-like cells of mesenchymal origin similar to the valvular interstitial cells (VICs) in NAV tissue. The extracellular matrix (ECM) of HP had a statistically significantly (p ≤ 0...
January 17, 2018: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/29335617/cardiovascular-function-of-modern-pigs-does-not-comply-with-allometric-scaling-laws
#5
Gerard J van Essen, Maaike Te Lintel Hekkert, Oana Sorop, Ilkka Heinonen, Jolanda van der Velden, Daphne Merkus, Dirk J Duncker
Growing concerns have been expressed regarding cardiovascular performance in modern farm pigs, which has been proposed as a critical factor contributing to the reduced adaptability of modern pigs to stress. Here we tested the hypothesis that cardiac dimensions and pump function in modern heavy farm pigs are disproportionally low for their body weight, and investigated potential underlying mechanisms. The results from the present study indeed demonstrate disproportionally low values for stroke volume and cardiac output in pigs with bodyweights over 150 kg...
January 15, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29334490/differential-impact-of-local-and-regional-aortic-stiffness-on-left-ventricular-remodeling-a-cardiovascular-magnetic-resonance-study
#6
Thiago Quinaglia, Mourad Z Bensalah, Emilie Bollache, Nadjia Kachenoura, Gilles Soulat, Pierre Boutouyrie, Stéphane Laurent, Elie Mousseaux
BACKGROUND: Left ventricular (LV) remodeling and aortic stiffness have independent predictive value for all causes and cardiovascular mortality. Because elastic properties of the arterial wall vary along the aortic pathway, we hypothesized that local and regional aortic stiffness could differently impact on LV remodeling. METHODS AND RESULTS: Regional aortic stiffness was determined from carotid-femoral pulse wave velocity (cfPWV) measured by aplanation tonometry...
January 13, 2018: Journal of Hypertension
https://www.readbyqxmd.com/read/29330911/title-prognostic-significance-of-arterial-stiffness-and-osteoprotegerin-in-patients-with-stable-coronary-artery-disease
#7
Gerasimos Siasos, Evangelos Oikonomou, Konstantinos Maniatis, Georgios Georgiopoulos, Eleni Kokkou, Vasiliki Tsigkou, Marina Zaromitidou, Alexis Antonopoulos, Manolis Vavuranakis, Christodoulos Stefanadis, Athanasios G Papavassiliou, Dimitris Tousoulis
BACKGROUND: Arterial stiffness and vascular calcification significantly contribute to coronary atherosclerosis progression. The prognostic value of increased arterial stiffness and vascular calcification in subjects with stable coronary artery disease (CAD) after percutaneous coronary intervention(PCI) is currently under question. MATERIALS AND METHODS: We randomly enrolled 262 patients with stable CAD one month after successful PCI. Carotid femoral pulse wave velocity (PWV) was measured as a well-established index of central aortic stiffness...
January 13, 2018: European Journal of Clinical Investigation
https://www.readbyqxmd.com/read/29326371/mycoplasma-pneumoniae-infection-presenting-as-stroke-and-meningoencephalitis-with-aortic-and-subclavian-aneurysms-without-pulmonary-involvement
#8
Pournamy Sarathchandran, Abubaker Al Madani, Ayman M Alboudi, Jihad Inshasi
A 39-year-old Philipino man presented with acute onset fever and headache. Neurological examination was normal except for neck stiffness. There was no history of chest pain, cough or breathlessness. Cerebrospinal fluid (CSF) showed a mild increase in protein with normal sugar and lymphocytic pleocytosis. CSF PCR for herpes simplex and varicella zoster virus was negative. He developed acute right haemiplegia a week after hospitalisation. MRI showed acute infarct in the left centrum semiovale. His angiogram showed aneurysm in the left subclavian artery and aortic arch...
January 11, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29318895/acute-effect-of-coffee-on-aortic-stiffness-and-wave-reflections-in-healthy-individuals-differential-effect-according-to-habitual-consumption
#9
Nikolaos Ioakeimidis, Vaios Tzifos, Charalambos Vlachopoulos, Dimitrios Terentes-Printzios, Christos Georgakopoulos, Dimitrios Tousoulis
The acute effect of coffee on arterial stiffness and its dependence on habitual consumption was studied in 24 volunteers on four separate occasions during which subjects received: (a) coffee espresso, (b) decaffeinated coffee espresso, (c) caffeine alone and (d) placebo (hot water). The increase in carotid femoral pulse wave velocity (PWV), augmentation index (AIx) and augmented pressure (AP) of the aortic pressure waveform after coffee consumption was more pronounced in non-habitual (n = 13) compared to habitual drinkers (n = 11), (differences of maximal changes between groups in PWV, AIx, AP responses by 0...
January 10, 2018: International Journal of Food Sciences and Nutrition
https://www.readbyqxmd.com/read/29314768/medium-and-long-chain-acylcarnitines-are-associated-with-osteoarthritis-severity-and-arterial-stiffness-in-end-stage-osteoarthritis-patients-a-case-control-study
#10
Kaspar Tootsi, Jaak Kals, Mihkel Zilmer, Kaido Paapstel, Aigar Ottas, Aare Märtson
AIM: Arterial pathology has been suggested to be involved in osteoarthritis (OA). Metabolic profiling enables the determination of low-molecular-weight molecules, which might further explain the pathogenesis of OA and its relationship with cardiovascular diseases (CVD). The aim of this study was to compare the metabolic profile of lipid metabolism-related compounds and arterial stiffness in OA patients and in controls. METHOD: The serum of 70 end-stage OA patients prior to joint replacement surgery and 82 age-matched controls were analyzed by the AbsoluteIDQ™ p180 kit (BIOCRATES Life Sciences AG, Innsbruck, Austria) using the targeted metabolomic approach...
January 4, 2018: International Journal of Rheumatic Diseases
https://www.readbyqxmd.com/read/29312868/aortic-stiffness-is-increased-in-patients-with-hypereosinophilic-syndrome-being-in-early-necrotic-phase
#11
Attila Nemes, Imelda Marton, Péter Domsik, Anita Kalapos, Éva Pósfai, Szabolcs Modok, Zita Borbényi, Tamás Forster
Background: Persistent eosinophilia and eosinophil-mediated single- or multiple-organ damage are typical features of hypereosinophilic syndrome (HES). Theoretically, eosinophilic infiltration of the ascending aortic wall could not be excluded in HES, therefore the present study aimed to test whether HES is associated with abnormalities in aortic elastic properties. Methods: The present study comprised 10 HES patients (mean age: 57.6±10.1 years, 5 males) without known cardiovascular disease, their results were compared to 19 age-, gender- and risk factor-matched controls (59...
December 2017: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/29304157/conditional-deletion-of-rb1-in-the-tie2-lineage-leads-to-aortic-valve-regurgitation
#12
Marina Freytsis, Lauren Baugh, Zhiyi Liu, Irene Georgakoudi, Philip W Hinds, Lauren D Black, Gordon S Huggins
OBJECTIVE: Aortic valve disease is a complex process characterized by valve interstitial cell activation, disruption of the extracellular matrix culminating in valve mineralization occurring over many years. We explored the function of the retinoblastoma protein (pRb) in aortic valve disease, given its critical role in mesenchymal cell differentiation including bone development and mineralization. APPROACH AND RESULTS: We generated a mouse model of conditional pRb knockout (cKO) in the aortic valve regulated by Tie2-Cre-mediated excision of floxed RB1 alleles...
2018: PloS One
https://www.readbyqxmd.com/read/29300243/clinical-relevance-of-aortic-stiffness-in-end-stage-renal-disease-and-diabetes-implication-for-hypertension-management
#13
Alexandra Yannoutsos, Sola Aoun Bahous, Michel E Safar, Jacques Blacher
: Evidence suggests that aortic stiffness may antedate and contribute initially to the development of hypertension and cardiovascular risk (CVR). In treated hypertensive patients, both diabetes and end-stage renal disease (ESRD) are comorbid conditions associated with increased aortic stiffness and high CVR. Thus, the pathophysiological relationship between aortic stiffness, blood pressure (BP) and CVR may have clinical implication in the management of hypertension. In patients with diabetes or ESRD, aortic stiffness is a significant predictor of CVR, independently of BP control...
January 2, 2018: Journal of Hypertension
https://www.readbyqxmd.com/read/29288632/association-of-vascular-indices-with-novel-circulating-biomarkers-as-prognostic-factors-for-cardiovascular-complications-in-patients-with-type-2-diabetes-mellitus
#14
Katerina K Naka, Katerina Papathanassiou, Aris Bechlioulis, Konstantinos Pappas, Stelios Tigas, Dimitrios Makriyiannis, Sophia Antoniou, Nikolaos Kazakos, Alexandra Margeli, Ioannis Papassotiriou, Agathocles Tsatsoulis, Lampros K Michalis
BACKGROUND: The pathophysiology of atherosclerosis in type 2 diabetes mellitus (T2DM) is multifactorial. The association of vascular indices with circulating biomarkers of inflammation and insulin resistance and their role in the long-term cardiovascular prognosis in T2DM patients were currently investigated. PATIENTS AND METHODS: Patients with T2DM and poor glycemic control without known cardiovascular diseases (n=119) at baseline were enrolled and followed for about 9years...
December 27, 2017: Clinical Biochemistry
https://www.readbyqxmd.com/read/29287945/mechanisms-of-pulse-pressure-amplification-dipping-pattern-during-sleep-time-the-safar-study
#15
Antonios A Argyris, Efthimia Nasothimiou, Evaggelia Aissopou, Theodoros G Papaioannou, Yi Zhang, Jacques Blacher, Michel E Safar, Petros P Sfikakis, Athanase D Protogerou
The difference in pulse pressure (PP) between peripheral arteries and the aorta, called pulse pressure amplification (PPamp), is a well-described physiological phenomenon independently associated with cardiovascular events. Recent studies suggest that it exhibits circadian variability. Our aim was to detect the factors associated with the circadian variability of PPamp. In 497 consecutive subjects (aged 54 years, 56.7% male, 79.7% hypertensives), we assessed the circadian pattern of peripheral and central arterial hemodynamics by 24-hour evaluation of brachial and aortic blood pressure (BP), augmentation index (AI), and pulse wave velocity (PWV) using a validated oscillometric device (Mobil-O-Graph)...
December 14, 2017: Journal of the American Society of Hypertension: JASH
https://www.readbyqxmd.com/read/29286269/landmark-lecture-perloff-lecture-tribute-to-professor-joseph-kayle-perloff-and-lessons-learned-from-him-aortopathy-in-adults-with-chd
#16
Koichiro Niwa
Marfan syndrome, bicuspid aortic valve, and/or coarctation of the aorta are associated with medial abnormalities of the ascending aortic or para-coarctation aorta. Medial abnormalities in the ascending aorta are prevalent in other type of patients with a variety of CHDs such as single ventricle, persistent truncus arteriosus, transposition of the great arteries, hypoplastic left heart syndrome, and tetralogy of Fallot, encompassing a wide age range and may predispose to dilatation, aneurysm, and rapture necessitating aortic valve and root surgery...
December 2017: Cardiology in the Young
https://www.readbyqxmd.com/read/29283973/tenascin-c-promotes-chronic-pressure-overload-induced-cardiac-dysfunction-hypertrophy-and-myocardial-fibrosis
#17
Bruno K Podesser, Maximilian Kreibich, Elda Dzilic, David Santer, Lorenz Förster, Sandra Trojanek, Dietmar Abraham, Martin Krššák, Klaus U Klein, Eva V Tretter, Christoph Kaun, Johann Wojta, Barbara Kapeller, Inês Fonseca Gonçalves, Karola Trescher, Attila Kiss
AIMS: Left ventricular (LV) hypertrophy is characterized by cardiomyocyte hypertrophy and interstitial fibrosis ultimately leading to increased myocardial stiffness and reduced contractility. There is substantial evidence that the altered expression of matrix metalloproteinases (MMP) and Tenascin-C (TN-C) are associated with the progression of adverse LV remodeling. However, the role of TN-C in the development of LV hypertrophy because of chronic pressure overload as well as the regulatory role of TN-C on MMPs remains unknown...
December 27, 2017: Journal of Hypertension
https://www.readbyqxmd.com/read/29283006/regional-arterial-stiffness-in-central-and-peripheral-arteries-is-differentially-related-to-endothelial-dysfunction-assessed-by-brachial-flow-mediated-dilation-in-metabolic-syndrome
#18
Smriti Badhwar, Dinu S Chandran, Ashok Kumar Jaryal, Rajiv Narang, Kishore Kumar Deepak
The interrelationship between endothelial function and arterial stiffness may be different for central and peripheral arteries due to their structural and functional differences. The study aims to assess the interrelationship between central and peripheral vascular function and haemodynamics in metabolic syndrome. Thirty-seven patients [63.0 (57.5-66.0) years, 68.4% males] of metabolic syndrome (National Cholesterol Education Program - Adult Treatment Panel-III criteria) were studied. Carotid-femoral, carotid-radial pulse wave velocity and augmentation index (AIx@75) were assessed using applanation tonometry...
December 1, 2017: Diabetes & Vascular Disease Research
https://www.readbyqxmd.com/read/29282735/a-tough-life-in-utero-doesn-t-necessarily-make-for-a-stiff-future-sex-matters-for-aortic-passive-mechanics
#19
Marianne Tare, Helena C Parkington
Life in utero is not all smooth sailing for some. Even in individuals endowed with a 'perfect' set of genes other factors can conspire to make life less than ideal, inducing physiological adaptations in the fetus, some of which persist from the womb right through to the tomb. This article is protected by copyright. All rights reserved.
December 28, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/29279312/metabolic-predictors-of-change-in-vascular-function-prospective-associations-from-a-community-based-cohort
#20
Justin P Zachariah, Jian Rong, Martin G Larson, Naomi M Hamburg, Emelia J Benjamin, Ramachandran S Vasan, Gary F Mitchell
Vascular function varies with age because of physiological and pathological factors. We examined relations of longitudinal change in vascular function with change in metabolic traits. Longitudinal changes in vascular function and metabolic traits were examined in 5779 participants (mean age, 49.8±14.5 years; 54% women) who attended sequential examinations of the Framingham Offspring, Third Generation, and Omni-1 and Omni-2 cohorts. Multivariable regression analysis related changes in vascular measures (dependent variables), including carotid-femoral pulse wave velocity (CFPWV), forward pressure wave amplitude, characteristic impedance, central pulse pressure, and mean arterial pressure (MAP), with change in body mass index, fasting total:high-density lipoprotein cholesterol ratio, serum triglycerides, and blood glucose...
December 26, 2017: Hypertension
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