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https://www.readbyqxmd.com/read/29121163/gene-expression-profiling-reveals-heterogeneity-of-perivascular-adipose-tissues-surrounding-coronary-and-internal-thoracic-arteries
#1
Danbo Lu, Wei Wang, Limin Xia, Pu Xia, Yan Yan
The internal thoracic artery (ITA) that differs from coronary artery (CA), rarely develops atherosclerosis. Understanding the mechanism underlying such a difference will help to pave a new way to the prevention and treatment of the disease. We hypothesize herein that the difference in susceptibility to atherosclerosis between CA and ITA is attributable to the heterogeneity of perivascular adipose tissues (PVATs) surrounding these two kinds of arteries, i.e. PVAT-CA and PVAT-ITA. We isolated PVAT from eight patients of coronary heart disease (CHD) and four non-CHD patients...
November 7, 2017: Acta Biochimica et Biophysica Sinica
https://www.readbyqxmd.com/read/29055722/study-of-insulin-vascular-sensitivity-in-aortic-rings-and-endothelial-cells-from-aged-rats-subjected-to-caloric-restriction-role-of-perivascular-adipose-tissue
#2
S Amor, B Martín-Carro, C Rubio, J M Carrascosa, W Hu, Y Huang, A L García-Villalón, M Granado
The prevalence of metabolic syndrome is dramatically increasing among elderly population. Metabolic syndrome in aged individuals is associated with hyperinsulinemia and insulin resistance both in metabolic tissues and in the cardiovascular system, with this fact being associated with the cardiometabolic alterations associated to this condition. Caloric restriction (CR) improves insulin sensitivity and is one of the dietetic strategies most commonly used to enlarge life and to prevent aging induced cardiovascular alterations...
October 18, 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/28970806/perivascular-adipose-tissue-harbors-atheroprotective-igm-producing-b-cells
#3
Prasad Srikakulapu, Aditi Upadhye, Sam M Rosenfeld, Melissa A Marshall, Chantel McSkimming, Alexandra W Hickman, Ileana S Mauldin, Gorav Ailawadi, M Beatriz S Lopes, Angela M Taylor, Coleen A McNamara
Adipose tissue surrounding major arteries (Perivascular adipose tissue or PVAT) has long been thought to exist to provide vessel support and insulation. Emerging evidence suggests that PVAT regulates artery physiology and pathology, such as, promoting atherosclerosis development through local production of inflammatory cytokines. Yet the immune subtypes in PVAT that regulate inflammation are poorly characterized. B cells have emerged as important immune cells in the regulation of visceral adipose tissue inflammation and atherosclerosis...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28958692/effects-of-early-overnutrition-on-the-renal-response-to-ang-ii-and-expression-of-raas-components-in-rat-renal-tissue
#4
M Granado, S Amor, N Fernández, G Carreño-Tarragona, M C Iglesias-Cruz, B Martín-Carro, L Monge, A L García-Villalón
BACKGROUND AND AIMS: The aim of this study was to analyze the effects of early overnutrition (EON) on the expression of the renin angiotensin aldosterone system (RAAS) components in renal cortex, renal arteries and renal perivascular adipose tissue (PVAT), as well as the vascular response of renal arteries to Angiotensin II (Ang II). METHODS AND RESULTS: On birth day litters were adjusted to twelve (L12-control) or three (L3-overfed) pups per mother. Half of the animals were sacrificed at weaning (21 days old) and the other half at 5 months of age...
October 2017: Nutrition, Metabolism, and Cardiovascular Diseases: NMCD
https://www.readbyqxmd.com/read/28950824/perivascular-adipose-tissue-as-an-endocrine-organ-the-role-of-statins
#5
Fabio Sanna, Marios Margaritis, Charalambos Antoniades
Adipose tissue (AT), aside from being an energy storage site, functions as a source of cytokines, adipokines and other vasoactive molecules. Dysfunctional AT contributes to the development of cardiovascular disease by shifting to a pro-oxidant, pro-inflammatory phenotype. Perivascular AT (PVAT) is of particular importance to the development of vascular disease, due to its close proximity to the vascular wall. Molecules released from PVAT can exert both pro- and anti-contractile effects, the balance of which plays a role in controlling vascular tone...
September 26, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28934021/browning-of-abdominal-aorta-perivascular-adipose-tissue-inhibits-adipose-tissue-inflammation
#6
Run-Mei Li, Sui-Qing Chen, Ning-Xi Zeng, Shu-Hui Zheng, Li Guan, Hai-Mei Liu, Le-Quan Zhou, Jin-Wen Xu
BACKGROUND: Perivascular adipose tissue (PVAT) can regulate vascular homeostasis by secreting various adipokines. This study investigated the effects of PVAT browning on its endocrine function. METHODS: In the first section of our study, male Sprague-Dawley rats were randomly divided into cold exposure (8°C) and 24°C acclimation groups. After cold exposure for 7 days, interscapular brown adipose tissue (iBAT), subcutaneous white adipose tissue, thoracic aortic PVAT, and abdominal aortic PVAT (aPVAT) were harvested for histological and brown marker gene expression analysis...
November 2017: Metabolic Syndrome and related Disorders
https://www.readbyqxmd.com/read/28902432/c1q-tnf-related-protein-9-improves-the-anti-contractile-effects-of-perivascular-adipose-tissue-via-the-ampk-enos-pathway-in-diet-induced-obese-mice
#7
Fang Han, Yang Zhang, Mingxia Shao, Qingjie Mu, Xiaotong Jiao, Ningning Hou, Xiaodong Sun
The anti-contractile property of perivascular adipose tissue (PVAT) is abolished through an endothelium-dependent pathway in obesity. C1q/tumor necrosis factor-related protein (CTRP)9 improved endothelial function by promoting endothelium-dependent vasodilatation. The aims of this study were to investigate whether CTRP9 improves the anti-contractile effect of PVAT and protects against PVAT dysfunction in obese mice. The mice were treated with a high-fat diet with or without CTRP9 treatment. Thoracic aortas with or without PVAT (PVAT+ or PVAT-) were prepared, and concentration-dependent responses to phenylephrine were measured...
September 13, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/28877347/sex-differences-in-the-role-of-phospholipase-a2-dependent-arachidonic-acid-pathway-in-the-perivascular-adipose-tissue-function-in-pigs
#8
Abdulla A Ahmad, Michael D Randall, Richard E Roberts
KEY POINTS: The fat surrounding blood vessels (perivascular adipose tissue or PVAT) releases vasoactive compounds that regulate vascular smooth muscle tone. There are sex differences in the regulation of vascular tone, but, to date, no study has investigated whether there are sex differences in the regulation of blood vessel tone by PVAT. This study has identified that the cyclooxygenase products thromboxane and PGF2α are released from coronary artery PVAT from pigs. Thromboxane appears to mediate the PVAT-induced contraction in arteries from females, whereas PGF2α appears to mediate the contraction in arteries from males...
November 1, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28869322/attenuation-of-the-anti-contractile-effect-of-cooling-in-the-rat-aorta-by-perivascular-adipose-tissue
#9
Y Rafique, M AlBader, M Oriowo
In addition to providing mechanical support for blood vessels, the perivascular adipose tissue (PVAT) secretes a number of vasoactive substances and exerts an anticontractile effect. The main objective of this study was to find out whether the anticontractile effect of cooling in the rat aorta is affected by PVAT. Our hypothesis was that PVAT would enhance the anticontractile effect of cooling in the rat aorta. Aorta segments, with or without PVAT, were used in this investigation. Cumulative concentration-response curves were established for phenylephrine at 37°C or 24°C...
September 4, 2017: Autonomic & Autacoid Pharmacology
https://www.readbyqxmd.com/read/28830977/lack-of-direct-effect-of-adiponectin-on-vascular-smooth-muscle-cell-bkca-channels-or-ca-2-signaling-in-the-regulation-of-small-artery-pressure-induced-constriction
#10
Rachael Baylie, Majid Ahmed, Adrian D Bonev, David C Hill-Eubanks, Thomas J Heppner, Mark T Nelson, Adam S Greenstein
The aim of this study was to investigate mechanisms by which adiponectin influences vascular Ca(2+) signaling, K(+) channel activity and thus contractile tone of small arteries. Vasodilation to adiponectin was studied in mesenteric resistance arteries constricted with intraluminal pressure. Ca(2+) signals were characterized using high speed confocal microscopy of intact arteries. Patch clamp investigated the effect of adiponectin on individual VSMC potassium (K(+)) channel currents. Adiponectin dilated arteries constricted with pressure-induced tone by approximately 5% and the induced vasodilation was only transient...
August 2017: Physiological Reports
https://www.readbyqxmd.com/read/28797835/tumor-necrosis-factor-%C3%AE-receptor-1-contributes-to-ethanol-induced-vascular-reactive-oxygen-species-generation-and-hypertension
#11
Janaina A Simplicio, Natália A Gonzaga, Marcelo A Nakashima, Bruno S De Martinis, Thiago M Cunha, Luis F Tirapelli, Carlos R Tirapelli
We evaluated the contribution of tumor necrosis factor-α receptor 1 (TNFR1) to ethanol-induced hypertension and vascular oxidative stress and the possible role of perivascular adipose tissue (PVAT) in such responses. Male C57BL/6 wild-type (WT) or TNFR1-deficient mice (TNFR1(-/-)) were treated with ethanol (20% vol/vol) for 12 weeks. Ethanol induced an increase in blood pressure in WT mice and TNFR1(-/-) at 4 and 5 weeks of treatment, respectively. Treatment with ethanol increased tumor necrosis factor-α and interleukin-6 levels in aortas with or without PVAT (PVAT+ and PVAT-, respectively) from WT mice, but not TNFR1(-/-)...
July 22, 2017: Journal of the American Society of Hypertension: JASH
https://www.readbyqxmd.com/read/28780050/hesperidin-reverses-perivascular-adipose-mediated-aortic-stiffness-with-aging
#12
An Ouyang, Tyler B Garner, Bradley S Fleenor
We tested the hypothesis that hesperidin would reverse age-related aortic stiffness, perivascular adipose (PVAT) mediated-arterial stiffening and PVAT advanced glycation end-products (AGE) accumulation. Aortic pulse wave velocity (aPWV) and intrinsic mechanical stiffness, two measures of arterial stiffness, were assessed in C57BL/6 mice that were young (6months), old (27-29months), or old treated with hesperidin for 4weeks. Old compared with young mice had increased aPWV (444±10 vs. 358±8cm/s, P<0.05) and mechanical stiffness (6506±369 vs...
August 3, 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/28762019/epicardial-adipose-tissue-as-a-metabolic-transducer-role-in-heart-failure-and-coronary-artery-disease
#13
REVIEW
Vaibhav B Patel, Saumya Shah, Subodh Verma, Gavin Y Oudit
Obesity and diabetes are strongly associated with metabolic and cardiovascular disorders including dyslipidemia, coronary artery disease, hypertension, and heart failure. Adipose tissue is identified as a complex endocrine organ, which by exerting a wide array of regulatory functions at the cellular, tissue and systemic levels can have profound effects on the cardiovascular system. Different terms including "epicardial," "pericardial," and "paracardial" have been used to describe adipose tissue deposits surrounding the heart...
November 2017: Heart Failure Reviews
https://www.readbyqxmd.com/read/28751570/association-of-coronary-perivascular-adipose-tissue-inflammation-and-drug-eluting-stent-induced-coronary-hyperconstricting-responses-in-pigs-18-f-fluorodeoxyglucose-positron-emission-tomography-imaging-study
#14
Kazuma Ohyama, Yasuharu Matsumoto, Hirokazu Amamizu, Hironori Uzuka, Kensuke Nishimiya, Susumu Morosawa, Michinori Hirano, Hiroshi Watabe, Yoshihito Funaki, Satoshi Miyata, Jun Takahashi, Kenta Ito, Hiroaki Shimokawa
OBJECTIVE: Although coronary perivascular adipose tissue (PVAT) may play important roles as a source of inflammation, the association of coronary PVAT inflammation and coronary hyperconstricting responses remains to be examined. We addressed this important issue in a porcine model of coronary hyperconstricting responses after drug-eluting stent implantation with (18)F-fluorodeoxyglucose ((18)F-FDG) positron emission tomographic imaging. APPROACH AND RESULTS: An everolimus-eluting stent (EES) was randomly implanted in pigs into the left anterior descending or the left circumflex coronary artery while nonstented coronary artery was used as a control...
September 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28733145/adipocytes-promote-nicotine-induced-injury-of-endothelial-cells-via-the-nf-%C3%AE%C2%BAb-pathway
#15
Xiu Liu, Chao-Nan Wang, Chen-Yang Qiu, Wei Song, Lin-Fang Wang, Bao Liu
Cigarette smoking is one of the most important risk factors of atherosclerosis, which can induce endothelial injury. Meanwhile, adipocytes are the main cell type of perivascular adipose tissue (PVAT), the largest endocrine and paracrine organ and direct anatomical connection to adventitia, which may play a key role in the injury of endothelial cells. We used nicotine to induce dysfunctional HUVECs and adipocytes. In addition, we used a novel model to co-culture HUVECs and adipocytes in vitro by the transwell co-culture system to determine the effect of adipocytes on endothelial injury...
October 1, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28715395/expansion-and-adipogenesis-induction-of-adipocyte-progenitors-from-perivascular-adipose-tissue-isolated-by-magnetic-activated-cell-sorting
#16
Kyan Thelen, Nadia Ayala-Lopez, Stephanie W Watts, G Andres Contreras
Expansion of Perivascular Adipose Tissue (PVAT), a major regulator of vascular function through paracrine signaling, is directly related to the development of hypertension during obesity. The extent of hypertrophy and hyperplasia depends on depot location, sex, and the type of Adipocyte Progenitor Cell (APC) phenotypes present. Techniques used for APC and preadipocytes isolation in the last 10 years have drastically improved the accuracy at which individual cells can be identified based on specific cell surface markers...
June 30, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28701474/detecting-human-coronary-inflammation-by-imaging-perivascular-fat
#17
Alexios S Antonopoulos, Fabio Sanna, Nikant Sabharwal, Sheena Thomas, Evangelos K Oikonomou, Laura Herdman, Marios Margaritis, Cheerag Shirodaria, Anna-Maria Kampoli, Ioannis Akoumianakis, Mario Petrou, Rana Sayeed, George Krasopoulos, Constantinos Psarros, Patricia Ciccone, Carl M Brophy, Janet Digby, Andrew Kelion, Raman Uberoi, Suzan Anthony, Nikolaos Alexopoulos, Dimitris Tousoulis, Stephan Achenbach, Stefan Neubauer, Keith M Channon, Charalambos Antoniades
Early detection of vascular inflammation would allow deployment of targeted strategies for the prevention or treatment of multiple disease states. Because vascular inflammation is not detectable with commonly used imaging modalities, we hypothesized that phenotypic changes in perivascular adipose tissue (PVAT) induced by vascular inflammation could be quantified using a new computerized tomography (CT) angiography methodology. We show that inflamed human vessels release cytokines that prevent lipid accumulation in PVAT-derived preadipocytes in vitro, ex vivo, and in vivo...
July 12, 2017: Science Translational Medicine
https://www.readbyqxmd.com/read/28697993/dipeptidyl-peptidase-iv-inhibitors-as-novel-regulators-of-vascular-disease
#18
REVIEW
Ioannis Akoumianakis, Charalambos Antoniades
Dipeptidyl peptidase IV (DPP-IV) has been revealed as an adipokine with potential relevance in cardiovascular disease (CVD), while clinically used DPP-IV inhibitors have demonstrated beneficial cardiovascular effects in several experimental studies. Perivascular adipose tissue (PVAT) is a unique adipose tissue depot in close anatomical proximity and bidirectional functional interaction with the vascular wall, which is a source of DPP-IV and its biology may be influenced by DPP-IV inhibition. Recently, DPP-IV inhibition has been associated with decreased local inflammation and oxidative stress both in the vascular wall and the PVAT, potentially regulating atherogenesis progression in vivo...
September 2017: Vascular Pharmacology
https://www.readbyqxmd.com/read/28672425/effects-of-resveratrol-on-enos-in-the-endothelium-and-the-perivascular-adipose-tissue
#19
REVIEW
Ning Xia, Ulrich Förstermann, Huige Li
Under physiological conditions, nitric oxide (NO) is produced in the vasculature mainly by the endothelial NO synthase (eNOS). Experiments using gene-disrupted mice have demonstrated that eNOS has antihypertensive, antithrombotic, and antiatherosclerotic effects. Recent studies show that eNOS is expressed not only in the endothelium but also in the perivascular adipose tissue (PVAT). Resveratrol prevents eNOS uncoupling and upregulates eNOS expression and activity. These effects of resveratrol are well established for the eNOS enzyme in the endothelium...
September 2017: Annals of the New York Academy of Sciences
https://www.readbyqxmd.com/read/28667067/oxidative-and-inflammatory-signals-in-obesity-associated-vascular-abnormalities
#20
REVIEW
John J Reho, Kamal Rahmouni
Obesity is associated with increased cardiovascular morbidity and mortality in part due to vascular abnormalities such as endothelial dysfunction and arterial stiffening. The hypertension and other health complications that arise from these vascular defects increase the risk of heart diseases and stroke. Prooxidant and proinflammatory signaling pathways as well as adipocyte-derived factors have emerged as critical mediators of obesity-associated vascular abnormalities. Designing treatments aimed specifically at improving the vascular dysfunction caused by obesity may provide an effective therapeutic approach to prevent the cardiovascular sequelae associated with excessive adiposity...
July 15, 2017: Clinical Science (1979-)
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