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https://www.readbyqxmd.com/read/29454047/renal-perivascular-adipose-tissue-form-and-function
#1
Carolina Baraldi A Restini, Alex Ismail, Ramya K Kumar, Robert Burnett, Hannah Garver, Gregory D Fink, Stephanie W Watts
Renal sympathetic activity affects blood pressure in part by increasing renovascular resistance via release of norepinephrine (NE) from sympathetic nerves onto renal arteries. Here we test the idea that adipose tissue adjacent to renal blood vessels, i.e. renal perivascular adipose tissue (RPVAT), contains a pool of NE which can be released to alter renal vascular function. RPVAT was obtained from around the main renal artery/vein of the male Sprague Dawley rats. Thoracic aortic PVAT and mesenteric PVAT also were studied as brown-like and white fat comparators respectively...
February 14, 2018: Vascular Pharmacology
https://www.readbyqxmd.com/read/29450852/major-pancreatic-resections-normal-postoperative-findings-and-complications
#2
Marco Chincarini, Giulia A Zamboni, Roberto Pozzi Mucelli
OBJECTIVES: (1) To illustrate and describe the main types of pancreatic surgery; (2) to discuss the normal findings after pancreatic surgery; (3) to review the main complications and their radiological findings. BACKGROUND: Despite the decreased postoperative mortality, morbidity still remains high resulting in longer hospitalisations and greater costs. Imaging findings following major pancreatic resections can be broadly divided into "normal postoperative alterations" and real complications...
February 15, 2018: Insights Into Imaging
https://www.readbyqxmd.com/read/29444588/periaortic-adipose-tissue-compared-with-peribrachial-adipose-tissue-mass-as-markers-and-possible-modulators-of-cardiometabolic-risk
#3
Elko Randrianarisoa, Norbert Stefan, Andreas Fritsche, Anja Hieronimus, Bernd Balletshofer, Jürgen Machann, Dorothea Siegel-Axel, Hans-Ulrich Häring, Kilian Rittig
Increased perivascular fat mass contributes to cardiometabolic risk (CMR). High peribrachial adipose tissue (PBAT) associates with insulin resistance independently of established CMR parameters. It is unknown to what extent periaortic adipose tissue (PAAT) may have a similar impact. In 95 participants, precise quantification of total adipose tissue, PBAT, PAAT, visceral adipose tissue (VAT), and liver fat (LF) content was performed by whole-body magnetic resonance imaging. Insulin sensitivity was determined by oral glucose tolerance test and carotid intima-media thickness (cIMT) by high-resolution ultrasound...
January 1, 2018: Angiology
https://www.readbyqxmd.com/read/29443547/modeling-heart-failure-risk-in-diabetes-and-kidney-disease-limitations-and-potential-applications-of-transverse-aortic-constriction-in-high-fat-fed-mice
#4
Wei Sheng Tan, Thomas P Mullins, Melanie Flint, Sarah L Walton, Helle Bielefeldt-Ohmann, David A Carter, Meera R Gandhi, Hayley R McDonald, Joan Li, Karen M Moritz, Melissa E Reichelt, Linda A Gallo
There is an increased incidence of heart failure in individuals with diabetes mellitus (DM). The co-existence of kidney disease in DM exacerbates the cardiovascular prognosis. Researchers have attempted to combine the critical features of heart failure, using transverse aortic constriction, with DM in mice but variable findings have been reported. Furthermore, kidney outcomes have not been assessed in this setting thus its utility as a model of heart failure in DM and kidney disease is unknown. We generated a mouse model of obesity, hyperglycemia and mild kidney pathology by feeding male C57BL/6J mice a high fat diet (HFD)...
February 14, 2018: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/29425108/neck-adipose-tissue-tying-ties-in-metabolic-disorders
#5
REVIEW
Vlatka Pandzic Jaksic, Danijela Grizelj, Ana Livun, Drago Boscic, Marko Ajduk, Rajko Kusec, Ozren Jaksic
Upper body adipose tissue accumulation has been associated with clustering of metabolic disorders and increased cardiovascular risk. Neck circumference (NC) indicated that subcutaneous adipose tissue (SAT) in that region is an independent pathogenic depot that might account for the additional risk missed by visceral adipose tissue (VAT). Neck adipose tissue (NAT) is not only one more ectopic depot but has several particular features that might modulate its metabolic role. Besides a controversial impact on obstructive apnea syndrome, neck fat encompasses carotid arteries as an important perivascular adipose tissue (PVAT) depot...
February 9, 2018: Hormone Molecular Biology and Clinical Investigation
https://www.readbyqxmd.com/read/29417051/inflammation-in-vein-graft-disease
#6
REVIEW
Margreet R de Vries, Paul H A Quax
Bypass surgery is one of the most frequently used strategies to revascularize tissues downstream occlusive atherosclerotic lesions. For venous bypass surgery the great saphenous vein is the most commonly used vessel. Unfortunately, graft efficacy is low due to the development of vascular inflammation, intimal hyperplasia and accelerated atherosclerosis. Moreover, failure of grafts leads to significant adverse outcomes and even mortality. The last couple of decades not much has changed in the treatment of vein graft disease (VGD)...
2018: Frontiers in Cardiovascular Medicine
https://www.readbyqxmd.com/read/29401041/perivascular-epicardial-fat-stranding-at-coronary-ct-angiography-a-marker-of-acute-plaque-rupture-and-spontaneous-coronary-artery-dissection
#7
Sandeep Hedgire, Vinit Baliyan, Evan J Zucker, Daniel O Bittner, Pedro Staziaki, Richard A P Takx, Jan-Erik Scholtz, Nandini Meyersohn, Udo Hoffmann, Brian Ghoshhajra
Purpose To evaluate the frequency and implications of perivascular fat stranding on coronary computed tomography (CT) angiograms obtained for suspected acute coronary syndrome (ACS). Materials and Methods This retrospective registry study was approved by the institutional review board. The authors reviewed the medical records and images of 1403 consecutive patients (796 men, 607 women; mean age, 52.8 years) who underwent coronary CT angiography at the emergency department from February 2012 to March 2016. Fat attenuation, length and number of circumferential quadrants of the affected segment, and attenuation values in the unaffected epicardial and subcutaneous fat were measured...
February 5, 2018: Radiology
https://www.readbyqxmd.com/read/29396370/distinct-adipocyte-progenitor-cells-are-associated-with-regional-phenotypes-of-perivascular-aortic-fat-in-mice
#8
Khanh-Van Tran, Timothy Fitzgibbons, So Yun Min, Tiffany DeSouza, Silvia Corvera
OBJECTIVE: Perivascular adipose tissue depots around the aorta are regionally distinct and have specific functional properties. Thoracic aorta perivascular adipose tissue (tPVAT) expresses higher levels of thermogenic genes and lower levels of inflammatory genes than abdominal aorta perivascular adipose tissue (aPVAT). It is not known whether this distinction is due to the in-vivo functional environment or to cell-autonomous traits that persist outside the in-vivo setting. In this study, we asked whether the progenitor cells in tPVAT and aPVAT have cell-autonomous traits that lead to formation of regionally distinct PVAT...
January 10, 2018: Molecular Metabolism
https://www.readbyqxmd.com/read/29357124/role-of-perivascular-adipose-tissue-in-health-and-disease
#9
Maria S Fernández-Alfonso, Beatriz Somoza, Dmitry Tsvetkov, Artur Kuczmanski, Mick Dashwood, Marta Gil-Ortega
Perivascular adipose tissue (PVAT) is cushion of fat tissue surrounding blood vessels, which is phenotypically different from other adipose tissue depots. PVAT is composed of adipocytes and stromal vascular fraction, constituted by different populations of immune cells, endothelial cells, and adipose-derived stromal cells. It expresses and releases an important number of vasoactive factors with paracrine effects on vascular structure and function. In healthy individuals, these factors elicit a net anticontractile and anti-inflammatory paracrine effect aimed at meeting hemodynamic and metabolic demands of specific organs and regions of the body...
December 12, 2017: Comprehensive Physiology
https://www.readbyqxmd.com/read/29336260/adipocytes-and-abdominal-aortic-aneurysm-putative-potential-role-of-adipocytes-in-the-process-of-aaa-development
#10
Hirona Kugo, Tatsuya Moriyama, Nobuhiro Zaima
Background Adipose tissue plays a role in the storage of excess energy as triglycerides (TGs). Excess fat accumulation causes various metabolic and cardiovascular diseases. It has been reported that ectopic fat deposition and excess TG accumulation in non-adipose tissue might be important predictors of cardiometabolic and vascular risk. For example, ectopic fat in perivascular tissue promotes atherosclerotic plaque formation in the arterial wall. Objective Recently, it has been reported that ectopic fat (adipocyte) in the vascular wall of an abdominal aortic aneurysm (AAA) is present in both human and experimental animal models...
January 15, 2018: Current Drug Targets
https://www.readbyqxmd.com/read/29242199/organ-specific-lymphatic-vasculature-from-development-to-pathophysiology
#11
REVIEW
Tatiana V Petrova, Gou Young Koh
Recent discoveries of novel functions and diverse origins of lymphatic vessels have drastically changed our view of lymphatic vasculature. Traditionally regarded as passive conduits for fluid and immune cells, lymphatic vessels now emerge as active, tissue-specific players in major physiological and pathophysiological processes. Lymphatic vessels show remarkable plasticity and heterogeneity, reflecting their functional specialization to control the tissue microenvironment. Moreover, alternative developmental origins of lymphatic endothelial cells in some organs may contribute to the diversity of their functions in adult tissues...
December 14, 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/29204239/wilkie-s-syndrome
#12
Renato Farina, Pietro Valerio Foti, Giuseppe Cocuzza, Valeria Costanzo, Giuliana Costanzo, Alessandro Conti, Alfredo Torcitto, Monica Pennisi
Superior mesenteric artery syndrome, also known as Wilkie's syndrome, is a rare vascular disease caused by the anomalous course of the superior mesenteric artery arising from the abdominal aorta with a smaller angle than the norm (<22°). The reduced angle compresses the structures situated between the aorta and the superior mesenteric artery, such as the duodenum and left renal vein; this can determine painful crises, intestinal subocclusions, and left varicocele. This syndrome can be congenital or acquired...
December 2017: Journal of Ultrasound
https://www.readbyqxmd.com/read/29167167/cellular-mechanisms-underlying-obesity-induced-arterial-stiffness
#13
Annayya R Aroor, Guanghong Jia, James R Sowers
Obesity is an emerging pandemic driven by consumption of a diet rich in high fat and high refined carbohydrates (western diet [WD]) and a sedentary life style in both children and adults. There is mounting evidence that arterial stiffness in obesity is an independent and strong predictor of adverse cardiovascular disease (CVD), cognitive functional decline and chronic kidney disease. Cardiovascular stiffness is a precursor to systolic hypertension, cardiac diastolic dysfunction, impairment of coronary and cerebral blood flow, and atherosclerosis...
November 22, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/29048462/obesity-induced-vascular-dysfunction-and-arterial-stiffening-requires-endothelial-cell-arginase-1
#14
Anil Bhatta, Lin Yao, Zhimin Xu, Haroldo A Toque, Jijun Chen, Reem T Atawia, Abdelrahman Y Fouda, Zsolt Bagi, Rudolf Lucas, Ruth B Caldwell, Robert W Caldwell
Aims: Elevation of arginase activity has been linked to vascular dysfunction in diabetes and hypertension by a mechanism involving decreased nitric oxide (NO) bioavailability due to L-arginine depletion. Excessive arginase activity also can drive L-arginine metabolism towards the production of ornithine, polyamines, and proline, promoting proliferation of vascular smooth muscle cells and collagen formation, leading to perivascular fibrosis. We hypothesized that there is a specific involvement of arginase 1 expression within the vascular endothelial cells in this pathology...
November 1, 2017: Cardiovascular Research
https://www.readbyqxmd.com/read/29038558/prokineticin-receptor-1-dependent-paracrine-and-autocrine-pathways-control-cardiac-tcf21-fibroblast-progenitor-cell-transformation-into-adipocytes-and-vascular-cells
#15
Rehana Qureshi, Michel Kindo, Himanshu Arora, Mounia Boulberdaa, Marja Steenman, Canan G Nebigil
Cardiac fat tissue volume and vascular dysfunction are strongly associated, accounting for overall body mass. Despite its pathophysiological significance, the origin and autocrine/paracrine pathways that regulate cardiac fat tissue and vascular network formation are unclear. We hypothesize that adipocytes and vasculogenic cells in adult mice hearts may share a common cardiac cells that could transform into adipocytes or vascular lineages, depending on the paracrine and autocrine stimuli. In this study utilizing transgenic mice overexpressing prokineticin receptor (PKR1) in cardiomyocytes, and tcf21ERT-cre(TM)-derived cardiac fibroblast progenitor (CFP)-specific PKR1 knockout mice (PKR1 (tcf-/-)), as well as FACS-isolated CFPs, we showed that adipogenesis and vasculogenesis share a common CFPs originating from the tcf21(+) epithelial lineage...
October 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29016715/matrix-metalloproteinase-2-knockout-prevents-angiotensin-ii-induced-vascular-injury
#16
Tlili Barhoumi, Julio C Fraulob-Aquino, Muhammad Oneeb Rehman Mian, Sofiane Ouerd, Noureddine Idris-Khodja, Ku-Geng Huo, Asia Rehman, Antoine Caillon, Bianca Dancose-Giambattisto, Talin Ebrahimian, Stéphanie Lehoux, Pierre Paradis, Ernesto L Schiffrin
Aims: Matrix metalloproteinases (MMPs) have been implicated in the development of hypertension in animal models and humans. Mmp2 deletion did not change Ang II-induced blood pressure (BP) rise. However, whether Mmp2 knockout affects angiotensin (Ang) II-induced vascular injury has not been tested. We sought to determine whether Mmp2 knockout will prevent Ang II-induced vascular injury. Methods and results: A fourteen-day Ang II infusion (1000 ng/kg/min, SC) increased systolic BP, decreased vasodilatory responses to acetylcholine, induced mesenteric artery (MA) hypertrophic remodelling, and enhanced MA stiffness in wild-type (WT) mice...
July 20, 2017: Cardiovascular Research
https://www.readbyqxmd.com/read/28970806/perivascular-adipose-tissue-harbors-atheroprotective-igm-producing-b-cells
#17
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/28934021/browning-of-abdominal-aorta-perivascular-adipose-tissue-inhibits-adipose-tissue-inflammation
#18
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
#19
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/28868898/the-tumour-suppressor-cdkn2a-p16-ink4a-regulates-adipogenesis-and-bone-marrow-dependent-development-of-perivascular-adipose-tissue
#20
Kristiaan Wouters, Yann Deleye, Sarah A Hannou, Jonathan Vanhoutte, Xavier Maréchal, Augustin Coisne, Madjid Tagzirt, Bruno Derudas, Emmanuel Bouchaert, Christian Duhem, Emmanuelle Vallez, Casper G Schalkwijk, François Pattou, David Montaigne, Bart Staels, Réjane Paumelle
The genomic CDKN2A/B locus, encoding p16(INK4a) among others, is linked to an increased risk for cardiovascular disease and type 2 diabetes. Obesity is a risk factor for both cardiovascular disease and type 2 diabetes. p16(INK4a) is a cell cycle regulator and tumour suppressor. Whether it plays a role in adipose tissue formation is unknown. p16(INK4a) knock-down in 3T3/L1 preadipocytes or p16(INK4a) deficiency in mouse embryonic fibroblasts enhanced adipogenesis, suggesting a role for p16(INK4a) in adipose tissue formation...
November 2017: Diabetes & Vascular Disease Research
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