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https://www.readbyqxmd.com/read/29656494/oxidized-ldl-phagocytosis-during-foam-cell-formation-in-atherosclerotic-plaques-relies-on-a-pld2-cd36-functional-interdependence
#1
Ramya Ganesan, Karen M Henkels, Lucile E Wrenshall, Yasunori Kanaho, Gilbert Di Paolo, Michael A Frohman, Julian Gomez-Cambronero
The uptake of cholesterol carried by low-density lipoprotein (LDL) is tightly controlled in the body. Macrophages are not well suited to counteract the cellular consequences of excess cholesterol leading to their transformation into "foam cells," an early step in vascular plaque formation. We have uncovered and characterized a novel mechanism involving phospholipase D (PLD) in foam cell formation. Utilizing bone marrow-derived macrophages from genetically PLD deficient mice, we demonstrate that PLD2 (but not PLD1)-null macrophages cannot fully phagocytose aggregated oxidized LDL (Agg-Ox-LDL), which was phenocopied with a PLD2-selective inhibitor...
April 14, 2018: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/29655567/acute-coronary-syndrome-relationship-between-genetic-variants-and-timi-risk
#2
Viviane do Carmo Vasconcelos de Carvalho, Lílian Caroliny Amorim Silva, Romário Martins Araújo, Fábia Carla da Silva Soares, Maria José Ribeiro Bezerra, Sávio Augusto Vieira de Oliveira, Alex José de Melo Silva, Sérgio Tavares Montenegro, Roberto Pereira Werkhauser, Carlos Gustavo Régis da Silva, Adriana Vieira Gomes, Clarice Neuenschwander Lins de Morais, Silvia Maria Lucena Montenegro
Acute Coronary Syndrome (ACS) is a multifactorial disease, including the genetic factor, caused by coronary artery obstruction by atheroma. Some genetic variants have been described as risk factors for this disease. Its early diagnosis and stratification of risk of death by Thrombolysis in Myocardial Infarction (TIMI) are important. Therefore, we evaluated variants in the IL6R (c950-1722C>T), TNFa (c.-488G>A), LEPR (c.2673+1118C>T) and IL1b (c.-598T>C) genes in relation to TIMI risk, cytokine serum levels, and risk factors for ACS...
April 11, 2018: Cytokine
https://www.readbyqxmd.com/read/29653075/inhibition-of-semicarbazide-sensitive-amine-oxidase-reduces-atherosclerosis-in-apolipoprotein-e-deficient-mice
#3
Shu-Huei Wang, Tse-Ya Yu, Feng-Chiao Tsai, Chris J Weston, Mao-Shin Lin, Chi-Sheng Hung, Hsien-Li Kao, Yu-I Li, Montse Solé, Mercedes Unzeta, Yuh-Lien Chen, Lee-Ming Chuang, Hung-Yuan Li
Inflammation, oxidative stress, and formation of advanced glycated end products (AGEs) and advanced lipoxidation end products (ALEs) are important for atherosclerosis. Vascular adhesion protein-1 (VAP-1) participates in inflammation and has semicarbazide-sensitive amine oxidase (SSAO) activity, which catalyzes oxidative deamination to produce hydrogen peroxide and aldehydes, leading to generation of AGEs and ALEs. However, the effect of VAP-1/SSAO inhibition on atherosclerosis remains controversial, and no studies used coronary angiography to evaluate if plasma VAP-1/SSAO is a biomarker for coronary artery disease (CAD)...
March 27, 2018: Translational Research: the Journal of Laboratory and Clinical Medicine
https://www.readbyqxmd.com/read/29625839/choroidal-and-sub-retinal-pigment-epithelium-caverns-multimodal-imaging-and-correspondence-with-friedman-lipid-globules
#4
Rosa Dolz-Marco, Jay P Glover, Orly Gal-Or, Katie M Litts, Jeffrey D Messinger, Yuhua Zhang, Mariano Cozzi, Marco Pellegrini, K Bailey Freund, Giovanni Staurenghi, Christine A Curcio
PURPOSE: To survey Friedman lipid globules by high-resolution histologic examination and to compare with multimodal imaging of hyporeflective caverns in eyes with geographic atrophy (GA) secondary to age-related macular (AMD) and other retinal diseases. DESIGN: Histologic survey of donor eyes with and without AMD. Clinical case series with multimodal imaging analysis. PARTICIPANTS: Donor eyes (n = 139; 26 with early AMD, 13 with GA, 40 with nAMD, 52 with a healthy macula, and 8 with other or unknown characteristics) and 41 eyes of 28 participants with GA (n = 16), nAMD (n = 8), Stargardt disease (n = 4), cone dystrophy (n = 2), pachychoroid spectrum (n = 6), choroidal hemangioma (n = 1), and healthy eyes (n = 4)...
April 3, 2018: Ophthalmology
https://www.readbyqxmd.com/read/29622338/pathologic-intimal-thickening-in-human-atherosclerosis-is-formed-by-extracellular-accumulation-of-plasma-derived-lipids-and-dispersion-of-intimal-smooth-muscle-cells
#5
Kazunori Nakagawa, Yutaka Nakashima
BACKGROUND AND AIMS: Pathologic intimal thickening (PIT) is an important stage of atherosclerosis that leads to atheroma. The present study aimed to clarify the pathogenesis of PIT in humans. METHODS: Coronary arteries were obtained from 43 autopsy subjects aged 15-49 years. Non-atherosclerotic intima and atherosclerotic intimal lesions were classified into four groups, i.e. diffuse intimal thickening, fatty infiltration, fatty streak, and PIT, and the number and density of macrophages and smooth muscle cells (SMCs) were determined...
March 26, 2018: Atherosclerosis
https://www.readbyqxmd.com/read/29619907/severe-atherosclerosis-in-donor-liver-vasculature-an-illustrative-case-report-and-review-of-the-literatur
#6
Ayokunle S Olowofela, Oscar K Serrano, Raja Kandaswamy
As the scarcity of transplantable organs continues to increase, juxtaposed with an aging donor population, transplant surgeons are increasingly confronted with marginal organ offers. The presence of atherosclerosis in the donor allograft has been shown to compromise the vascular integrity and predispose to vascular complications in the transplanted liver. Here, we present a case of 54-year-old brain-dead donor who was discovered to have a severely diseased aorta during organ recovery. Pathologic evaluation revealed severe atherosclerosis with calcifications...
April 4, 2018: Experimental and Clinical Transplantation
https://www.readbyqxmd.com/read/29616625/plaque-burden-influences-accurate-classification-of-fibrous-cap-atheroma-by-in-vivo-optical-coherence-tomography-in-a-porcine-model-of-advanced-coronary-atherosclerosis
#7
Christian B Poulsen, Ryan M Pedrigi, Nilesh Pareek, Ismail D Kilic, Niels Ramsing Holm, Jacob F Bentzon, Hans Erik Bøtker, Erling Falk, Rob Krams, Ranil de Silva
AIMS: In-vivo validation of coronary optical coherence tomography (OCT) against histology and the effects of plaque burden (PB) on plaque classification remain unreported. We investigated this in a porcine model with human-like coronary atherosclerosis. METHODS AND RESULTS: Five female Yucatan D374Y-PCSK9 transgenic hypercholesterolemic mini-pigs were implanted with a coronary shear-modifying stent to induce advanced atherosclerosis. OCT frames (n=201) were obtained 34 weeks after implantation...
April 3, 2018: EuroIntervention
https://www.readbyqxmd.com/read/29606415/effect-of-alirocumab-on-coronary-atheroma-volume-in-japanese-patients-with-acute-coronary-syndromes-and-hypercholesterolemia-not-adequately-controlled-with-statins-odyssey-j-ivus-rationale-and-design
#8
Junya Ako, Kiyoshi Hibi, Ken Kozuma, Katsumi Miyauchi, Yoshihiro Morino, Toshiro Shinke, Kenichi Tsujita, Kiyoko Uno, Yumiko Kawabata, Takafumi Hiro
BACKGROUND: Serial intravascular ultrasound (IVUS) imaging can be used to evaluate the effect of cholesterol-lowering on coronary atheroma progression and plaque volume, with evidence of potential incremental effects with more aggressive lipid-lowering treatments. Alirocumab is a highly specific, fully human monoclonal antibody to proprotein convertase subtilisin/kexin type 9 (PCSK9). This study will investigate the effect of alirocumab on coronary artery plaque volume in Japanese patients with a recent acute coronary syndrome (ACS) and hypercholesterolemia while on stable statin therapy...
March 29, 2018: Journal of Cardiology
https://www.readbyqxmd.com/read/29600479/ct-analysis-of-the-aorta-in-giant-cell-arteritis-a-case-control-study
#9
Pierre Emmanuel Berthod, Serge Aho-Glélé, Paul Ornetti, Olivier Chevallier, Hervé Devilliers, Frédéric Ricolfi, Bernard Bonnotte, Romaric Loffroy, Maxime Samson
OBJECTIVES: Giant cell arteritis (GCA) is a large-vessel vasculitis whose diagnosis is confirmed by temporal artery biopsy. However, involvement of large vessels, especially the aorta, can be shown by imaging, which plays an increasing role in GCA diagnosis. The threshold above which aortic wall thickening, as measured by computed tomography (CT), is considered pathological is controversial, with values ranging from 2 to 3 mm. This study assessed aortic morphology by CT scan and its diagnostic value in GCA...
March 29, 2018: European Radiology
https://www.readbyqxmd.com/read/29599135/par2-protease-activated-receptor-2-deficiency-attenuates-atherosclerosis-in-mice
#10
Shannon M Jones, Adrien Mann, Kelsey Conrad, Keith Saum, David E Hall, Lisa M McKinney, Nathan Robbins, Joel Thompson, Abigail D Peairs, Eric Camerer, Katey J Rayner, Michael Tranter, Nigel Mackman, A Phillip Owens
OBJECTIVE: PAR2 (protease-activated receptor 2)-dependent signaling results in augmented inflammation and has been implicated in the pathogenesis of several autoimmune conditions. The objective of this study was to determine the effect of PAR2 deficiency on the development of atherosclerosis. APPROACH AND RESULTS: PAR2 mRNA and protein expression is increased in human carotid artery and mouse aortic arch atheroma versus control carotid and aortic arch arteries, respectively...
March 29, 2018: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/29572206/roles-of-pad4-and-netosis-in-experimental-atherosclerosis-and-arterial-injury-implications-for-superficial-erosion
#11
Grégory Franck, Thomas L Mawson, Eduardo J Folco, Roberto Molinaro, Victoria Ruvkun, Daniel Engelbertsen, Xin Liu, Yevgenia Tesmenitsky, Eugenia Shvartz, Galina K Sukhova, Jean-Baptiste Michel, Antonino Nicoletti, Andrew H Lichtman, Denisa D Wagner, Kevin J Croce, Peter Libby
<u>Rationale:</u> Neutrophils likely contribute to the thrombotic complications of human atheromata. In particular, neutrophil extracellular traps (NETs) could exacerbate local inflammation and amplify and propagate arterial intimal injury and thrombosis. Peptidyl arginine deiminase 4 (PAD4) participates in NET formation, but understanding of this enzyme's role in atherothrombosis remains scant. <u>Objective:</u> This study tested the hypothesis that PAD4 and NETs influence experimental atherogenesis and in processes implicated in superficial erosion, a form of plaque complication we previously associated with NETs...
March 23, 2018: Circulation Research
https://www.readbyqxmd.com/read/29563385/contribution-of-poststent-irregular-protrusion-to-subsequent-in-stent-neoatherosclerosis-after-the-second-generation-drug-eluting-stent-implantation
#12
Yoshinori Sanuki, Shinjo Sonoda, Yoshitaka Muraoka, Akiyoshi Shimizu, Megumi Kitagawa, Hironori Takami, Reo Anai, Tetsu Miyamoto, Yasushi Oginosawa, Yuki Tsuda, Masaru Araki, Yutaka Otsuji
Previous optical coherence tomography (OCT) study reported that irregular protrusion (IP) post drug-eluting stent (DES) implantation was an independent predictor of clinical outcome; however, the relationship between IP and the presence of subsequent in-stent neoatherosclerosis remains unclear. This study aimed to assess the relationship between IP and in-stent neoatheroscrerosis formation using OCT. We evaluated 83 patients (101 lesions) who underwent second-generation DES implantation and 8-month follow-up (8M-FU) using OCT...
March 20, 2018: International Heart Journal
https://www.readbyqxmd.com/read/29561322/hdls-and-the-pathogenesis-of-atherosclerosis
#13
Adel Schwertani, Hong Y Choi, Jacques Genest
PURPOSE OF REVIEW: Plasma levels of HDL cholesterol are a biomarker of cardiovascular health but not a therapeutic target, as demonstrated by the failure of pharmacological modulation of HDL cholesterol to prevent or treat atherosclerotic cardiovascular disease. In health, HDL particles exert pleiotropic effects against atherosclerosis, including cholesterol removal from foam cells, vasodilatory effects through vascular endothelial cell nitric oxide production, decreased vascular inflammation and oxidative damage, endothelial cell proliferation and antiapoptotic effects...
March 19, 2018: Current Opinion in Cardiology
https://www.readbyqxmd.com/read/29560080/hydrogen-sulfide-abrogates-hemoglobin-lipid-interaction-in-atherosclerotic-lesion
#14
László Potor, Péter Nagy, Gábor Méhes, Zoltán Hendrik, Viktória Jeney, Dávid Pethő, Anita Vasas, Zoltán Pálinkás, Enikő Balogh, Ágnes Gyetvai, Matthew Whiteman, Roberta Torregrossa, Mark E Wood, Sándor Olvasztó, Péter Nagy, György Balla, József Balla
The infiltration of red blood cells into atheromatous plaques is implicated in atherogenesis. Inside the lesion, hemoglobin (Hb) is oxidized to ferri- and ferrylHb which exhibit prooxidant and proinflammatory activities. Cystathione gamma-lyase- (CSE-) derived H2 S has been suggested to possess various antiatherogenic actions. Expression of CSE was upregulated predominantly in macrophages, foam cells, and myofibroblasts of human atherosclerotic lesions derived from carotid artery specimens of patients. A similar pattern was observed in aortic lesions of apolipoprotein E-deficient mice on high-fat diet...
2018: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/29551863/detection-of-cytomegalovirus-epstein-barr-virus-and-torque-teno-virus-in-subgingival-and-atheromatous-plaques-of-cardiac-patients-with-chronic-periodontitis
#15
Sriraman Priyanka, Gurumoorthy Kaarthikeyan, Jayakumar Doraiswamy Nadathur, Anbarasu Mohanraj, Avinash Kavarthapu
Background: Periodontitis and atherosclerosis represent a chronic inflammatory process. The incidence of periodontitis in cardiac patients with atherosclerosis is a well-established fact. The role of viruses in the etiopathogenesis of both has been proposed. Aim: The aim of the study was to evaluate the prevalence of Torque Teno virus (TTV), Epstein-Barr virus (EBV), and cytomegalovirus (CMV) in cardiac patients with atherosclerosis and coexisting chronic periodontitis (CP)...
November 2017: Journal of Indian Society of Periodontology
https://www.readbyqxmd.com/read/29545437/infected-symptomatic-carotid-artery-atheroma-concurrent-with-bacterial-endocarditis
#16
Yamaan S Saadeh, Luis E Savastano, Julian L Gendreau, Aditya S Pandey
Optimal management of patients with stroke due to symptomatic carotid artery disease coexistent with bacterial endocarditis is still not well established. We report the case of a patient who presented with multifocal left middle cerebral artery stroke in the setting of Enterococcus faecalis endocarditis and was found to have near-occlusive ipsilateral carotid artery stenosis in stroke workup. Carotid artery endarterectomy was performed, and atheroma material demonstrated complicated plaque with cultures positive for E...
March 15, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29519952/association-of-fgf-2-concentrations-with-atheroma-progression-in-chronic-kidney-disease-patients
#17
Milica Bozic, Angels Betriu, Marcelino Bermudez-Lopez, Alberto Ortiz, Elvira Fernandez, Jose M Valdivielso
BACKGROUND AND OBJECTIVES: Atherosclerosis is highly prevalent in CKD. The rate of progression of atherosclerosis is associated with cardiovascular events. Fibroblast growth factor 2 (FGF-2) is a member of the FGF family with potentially both protective and deleterious effects in the development of atherosclerosis. The role of circulating FGF-2 levels in the progression of atherosclerosis in CKD is unknown. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS: We used a multicenter, prospective, observational cohorts study of 481 patients with CKD...
March 8, 2018: Clinical Journal of the American Society of Nephrology: CJASN
https://www.readbyqxmd.com/read/29496995/myeloperoxidase-catalyzed-oxidation-of-cyanide-to-cyanate-a-potential-carbamylation-route-involved-in-the-formation-of-atherosclerotic-plaques
#18
Cedric Delporte, Karim Zouaoui Boudjeltia, Paul G Furtmueller, Richard A Maki, Marc Dieu, Caroline Noyon, Monika Soudi, Damien Dufour, Catherine Coremans, Vincent Nuyens, Florence Reye, Alexandre Rousseau, Martine Raes, Nicole Moguilevsky, Michel Vanhaeverbeek, Jean Ducobu, Jean Neve, Bernard Robaye, Luc Vanhamme, Wanda F Reynolds, Christian Obinger, Pierre Van Antwerpen
Protein carbamylation by cyanate is a post-translational modification associated with several (patho)physiological conditions, including cardiovascular disorders. However, the biochemical pathways leading to protein carbamylation are incompletely characterized. This work demonstrates that the heme protein myeloperoxidase, which is secreted at high concentrations at inflammatory sites from stimulated neutrophils and monocytes, is able to catalyze the two-electron oxidation of cyanide to cyanate and promote the carbamylation of taurine, lysine and low-density-lipoproteins...
March 1, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29496901/evaluation-of-human-coronary-vasodilator-function-predicts-future-coronary-atheroma-progression
#19
Samuel L Sidharta, Timothy J Baillie, Stuart Howell, Stephen J Nicholls, Natalie Montarello, Satoshi Honda, Daisuke Shishikura, Sinny Delacroix, Susan Kim, John F Beltrame, Peter J Psaltis, Stephen G Worthley, Matthew I Worthley
OBJECTIVE: Coronary vasodilator function and atherosclerotic plaque progression have both been shown to be associated with adverse cardiovascular events. However, the relationship between these factors and the lipid burden of coronary plaque remains unknown. These experiments focus on investigating the relationship between impaired coronary vasodilator function (endothelium dependent (salbutamol) and endothelium independent (glyceryl trinitrate)) and the natural history of atheroma plaque progression and lipid burden using dual modality intravascular ultrasound (IVUS) and near-infrared spectroscopy (NIRS) imaging...
March 1, 2018: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/29464937/vascular-dysfunction-elicited-by-a-crosstalk-between-periaortic-adipose-tissue-and-the-vascular-wall-is-reversed-by-pioglitazone
#20
Isabel Quesada, Jimena Cejas, Rodrigo García, Beatriz Cannizzo, Analía Redondo, Claudia Castro
AIM: Perivascular adipose tissue (PVAT) is in intimate contact with the vessel wall and extravascular PVAT-derived inflammatory mediators may adversely influence atherosclerotic plaque formation and stability through outside-to-inside signalling. We sought to investigate the role of PVAT on the atheroma development in an experimental animal model of Metabolic Syndrome (MS) associated with oxidative stress and low-grade inflammatory state. We also studied the effect of Pioglitazone an insulin sensitizer, on the aortic wall and its surrounding PVAT, considering a bi-directional communication between both layers...
February 21, 2018: Cardiovascular Therapeutics
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