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Atherosclerotic plaque

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https://www.readbyqxmd.com/read/29457790/cd163-macrophages-promote-angiogenesis-and-vascular-permeability-accompanied-by-inflammation-in-atherosclerosis
#1
Liang Guo, Hirokuni Akahori, Emanuel Harari, Samantha L Smith, Rohini Polavarapu, Vinit Karmali, Fumiyuki Otsuka, Rachel L Gannon, Ryan E Braumann, Megan H Dickinson, Anuj Gupta, Audrey L Jenkins, Michael J Lipinski, Johoon Kim, Peter Chhour, Paul S de Vries, Hiroyuki Jinnouchi, Robert Kutys, Hiroyoshi Mori, Matthew D Kutyna, Sho Torii, Atsushi Sakamoto, Cheol Ung Choi, Qi Cheng, Megan L Grove, Mariem A Sawan, Yin Zhang, Yihai Cao, Frank D Kolodgie, David P Cormode, Dan E Arking, Eric Boerwinkle, Alanna C Morrison, Jeanette Erdmann, Nona Sotoodehnia, Renu Virmani, Aloke V Finn
Intake of hemoglobin by the hemoglobin-haptoglobin receptor CD163 leads to a distinct alternative non-foam cell antiinflammatory macrophage phenotype that was previously considered atheroprotective. Here, we reveal an unexpected but important pathogenic role for these macrophages in atherosclerosis. Using human atherosclerotic samples, cultured cells, and a mouse model of advanced atherosclerosis, we investigated the role of intraplaque hemorrhage on macrophage function with respect to angiogenesis, vascular permeability, inflammation, and plaque progression...
February 19, 2018: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/29457787/alternative-macrophages-in-atherosclerosis-not-always-protective
#2
Benoit Pourcet, Bart Staels
Atherosclerosis is a chronic inflammatory disease of the vasculature that is initiated by cholesterol deposition into the arterial wall, which triggers the infiltration of immune and inflammatory cells, including monocytes and macrophages. As atherosclerotic plaques progress, localized hypoxia promotes compensatory angiogenesis from the vasa vasorum. Immature neovessels are prone to leakage, thus destabilizing the plaque and leading to intraplaque hemorrhage. Macrophages with different phenotypes, ranging from classical inflammatory subtypes to alternatively activated antiinflammatory macrophages, have been identified in atherosclerotic lesions...
February 19, 2018: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/29455203/absence-of-nicotinamide-nucleotide-transhydrogenase-in-c57bl-6j-mice-exacerbates-experimental-atherosclerosis
#3
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/29448104/aim2-regulates-vascular-smooth-muscle-cell-migration-in-atherosclerosis
#4
Jinyu Pan, Lu Lu, Xuyang Wang, Dian Liu, Jingjing Tian, Hui Liu, Mingjun Zhang, Fengqin Xu, Fengshuang An
BACKGROUND: Atherosclerosis (AS) is a common pathological basis of various cardiovascular and cerebrovascular diseases. Plaque formation is initiated and triggered by vascular smooth musclecells (VSMCs) migration in vascular wall, which gradually aggravates atherosclerosis progression. Absent in melanoma 2 (AIM2), a member of HIN-200 family, plays an important role in activating inflammasome. However, the role of AIM2 in atherosclerotic plaque progression outside of the inflammasome has not yet been reported...
February 12, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29446645/the-relationship-of-perivascular-adipose-tissue-and-atherosclerosis-in-the-aorta-and-carotid-arteries-determined-by-magnetic-resonance-imaging
#5
Mohammad Alkhalil, Evan Edmond, Laurienne Edgar, Janet E Digby, Omar Omar, Matthew D Robson, Robin P Choudhury
BACKGROUND AND AIMS: Imaging studies have relied on the 'overall' volumetric quantification of perivascular adipose tissue. We sought to assess the relationship of circumferential distribution between perivascular adipose tissue and adjacent wall thickness of carotid and aortic arteries using dedicated magnetic resonance imaging sequences. METHODS: Vessel wall and perivascular adipose tissue were acquired using magnetic resonance imaging (1.5 T). Co-registered images were segmented separately, and measurements of both perivascular adipose tissue and vessel wall were obtained along radii of the vessel spaced at angles of 5° each...
February 1, 2018: Diabetes & Vascular Disease Research
https://www.readbyqxmd.com/read/29444453/efferocytosis-in-atherosclerotic-lesions-malfunctioning-regulatory-pathways-and-control-mechanisms
#6
REVIEW
Amir Tajbakhsh, Mehdi Rezaee, Petri T Kovanen, Amirhossein Sahebkar
Atherosclerosis is a dynamic and progressive inflammatory process in the intimal layer of large and medium-sized arteries, and it is the major contributor to the atherosclerotic cardiovascular disease (ACVD), the leading cause of death worldwide. In an atherosclerotic plaque, phagocytosis of apoptotic cells occurs through an intricate process designated efferocytosis. Defective efferocytosis has emerged as a causal factor in the etiopathogenesis of atherosclerosis and its progression into overt ACVD. Both specialized phagocytes (macrophages and dendritic cells) and non-specialized cells with phagocytic capabilities (smooth muscle and endothelial cells) are involved in the efferocytotic process...
February 11, 2018: Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/29441745/evaluation-of-atherosclerotic-plaque-in-non-invasive-coronary-imaging
#7
REVIEW
Aeshita Dwivedi, Subhi J Al'Aref, Fay Y Lin, James K Min
Coronary artery disease (CAD) is the leading cause of morbidity and mortality worldwide. Over the last decade coronary computed tomography angiography (CCTA) has gained wide acceptance as a reliable, cost-effective and non-invasive modality for diagnosis and prognostication of CAD. Use of CCTA is now expanding to characterization of plaque morphology and identification of vulnerable plaque. Additionally, CCTA is developing as a non-invasive modality to monitor plaque progression, which holds future potential in individualizing treatment...
February 2018: Korean Circulation Journal
https://www.readbyqxmd.com/read/29439878/thickness-and-an-altered-mirna-expression-in-the-epicardial-adipose-tissue-is-associated-with-coronary-heart-disease-in-sudden-death-victims
#8
Josep Marí-Alexandre, Moises Barceló-Molina, Jorge Sanz-Sánchez, Pilar Molina, Jennifer Sancho, Yolanda Abellán, María Luisa Santaolaria-Ayora, Juan Giner, Luis Martínez-Dolz, Amparo Estelles, Aitana Braza-Boïls, Esther Zorio
INTRODUCTION AND OBJECTIVES: An increased epicardial adipose tissue (EAT) thickness has become a new risk factor for coronary heart disease (CHD). We aimed to study the role of EAT dysfunction as a CHD marker by focusing on its thickness and microRNA (miRNA) expression profile, and the potential factors possibly influencing them. METHODS: One hundred and fifty-five CHD sudden cardiac death victims and 84 non-CHD-sudden death controls were prospectively enrolled at autopsy...
February 10, 2018: Revista Española de Cardiología
https://www.readbyqxmd.com/read/29439249/transgenic-overexpression-of-il-37-protects-against-atherosclerosis-and-strengthens-plaque-stability
#9
Jing Liu, Jibin Lin, Shaolin He, Chun Wu, Boyuan Wang, Jie Liu, Yanping Duan, Tianxiao Liu, Shengshuai Shan, Keping Yang, Nianguo Dong, Qingwei Ji, Kai Huang, Dazhu Li
BACKGROUND/AIMS: Recently, studies have shown that interleukin-37 (IL-37) is involved in atherosclerosis-related diseases. However, the regulatory mechanisms of IL-37 in atherosclerosis remain unknown. This study aims to determine the role of IL-37 in atherosclerosis and to investigate the underlying mechanisms involved. METHODS: IL-37 expression in human atherosclerotic plaques was detected by immunohistochemical staining and real-time reverse transcription polymerase chain reaction (RT-PCR)...
February 7, 2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29436628/gene-expression-profile-analysis-of-the-progression-of-carotid-atherosclerotic-plaques
#10
Wangmi Liu, Yanxin Zhao, Jiayan Wu
The present study aimed to examine the universal gene expression signature and the underlying molecular mechanisms involved in the progression of carotid atherosclerotic plaques. The gene expression dataset, GSE28829, containing 13 early and 16 advanced carotid atherosclerotic plaques was selected for analysis. The differentially expressed genes (DEGs) were identified and analyzed using bioinformatics analyses, including cluster analysis, Gene Ontology (GO) and pathway enrichment analyses. Finally, a protein‑protein interaction (PPI) was constructed and analyzed...
February 8, 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29436575/identification-of-novel-hyper-%C3%A2-or-hypomethylated-cpg-sites-and-genes-associated-with-atherosclerotic-plaque-using-an-epigenome-wide-association-study
#11
Yoshiji Yamada, Hideki Horibe, Mitsutoshi Oguri, Jun Sakuma, Ichiro Takeuchi, Yoshiki Yasukochi, Kimihiko Kato, Motoji Sawabe
DNA methylation is an important epigenetic modification that has been implicated in the pathogenesis of atherosclerosis. Although previous studies have identified various CpG sites and genes whose methylation is associated with atherosclerosis in populations with European or Mexican ancestry, the genome‑wide pattern of DNA methylation in the atherosclerotic human aorta is yet to be elucidated in Japanese individuals. In the present study, a genome‑wide analysis of DNA methylation at ~853,000 CpG sites was performed using 128 postmortem aortic intima specimens obtained from 64 Japanese patients...
February 2, 2018: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29436491/long-non-coding-rna-linc00657-acting-as-mir-590-3p-sponge-to-facilitate-low-concentration-oxidized-low-density-lipoprotein-induced-angiogenesis
#12
Mei-Hua Bao, Guang-Yi Li, Xiao-Shan Huang, Liang Tang, Li-Ping Dong, Jian-Ming Li
Angiogenesis in atherosclerotic plaque promotes plaque growth, causes plaque hemorrhage and violates plaque stability. LINC00657 is a long noncoding RNA highly conserved and abundantly expressed in vascular endothelial cells. The present study was designed to investigate the effects and mechanisms of LINC00675 on the low concentration of oxidized low-density lipoprotein (oxLDL) induced angiogenesis. Cell proliferation assay, transwell assay, wound healing assay, and tube formation assay were conducted to detect the effects of low concentration of oxLDL on angiogenesis; The results discovered that oxLDL promoted the cell proliferation, migration, and tube formation...
February 7, 2018: Molecular Pharmacology
https://www.readbyqxmd.com/read/29436385/cholesterol-efflux-capacity-does-not-associate-with-coronary-calcium-plaque-vulnerability-and-telomere-length-in-healthy-octogenarians
#13
Francesca Zimetti, Wladimir M Freitas, Alessandra M Campos, Mauricio Daher, Maria Pia Adorni, Franco Bernini, Andrei C Sposito, Ilaria Zanotti
Several studies revealed that traditional risk factors are less effective in predicting CVD risk in the elderly, suggesting the need to identify new biomarkers. Here we evaluated the association between serum cholesterol efflux capacity (CEC), an atheroprotective property of HDL recently identified as a novel marker of CVD risk, and atherosclerotic burden in a cohort of very old, healthy individuals. Serum CEC values were not significantly correlated neither with calcium score nor with markers of vulnerable plaque, such as positive remodeling, hypodensity, spotty calcification or napking-ring sign...
February 7, 2018: Journal of Lipid Research
https://www.readbyqxmd.com/read/29435395/atherothrombosis-is-a-thrombotic-not-inflammatory-disease
#14
REVIEW
Gregory D Sloop, Joseph J Weidman, John A St Cyr
The authors hypothesize that thrombosis causes both the complications of atherosclerosis as well as the underlying lesion, the atherosclerotic plaque, which develops from the organization of mural thrombi. These form in areas of slow blood flow, which develop because of flow separation created by changing vascular geometry and elevated blood viscosity. Many phenomena typically ascribed to inflammation or "chronic oxidative stress", such as the development of fatty streaks, "endothelial dysfunction," "vulnerable plaques," and the association of mild elevations of C-reactive protein and cytokines with atherothrombosis are better explained by hemorheologic and hemodynamic abnormalities, particularly elevated blood viscosity...
December 5, 2017: Curēus
https://www.readbyqxmd.com/read/29435135/association-of-snps-in-the-timp-2-gene-and-large-artery-atherosclerotic-stroke-in-southern-chinese-han-population
#15
Tie Guo, Haizhen Hao, Lv Zhou, Feng Zhou, Dan Yu
Tissue inhibitor of matrix metalloproteinase 2 (TIMP-2) regulates the extracellular matrix degradation, which involved in vascular remodeling and dysfunction, destabilization of atherosclerotic plaque and many other pathological processes. The rupture of atherosclerotic plaque is the trigger of Large artery atherosclerotic (LAA) stroke. We speculate that the Single nucleotide polymorphisms (SNPs) in TIMP-2 may have an association with LAA stroke. To prove this hypothesis, we conducted this case-control study...
January 12, 2018: Oncotarget
https://www.readbyqxmd.com/read/29432661/is-pulmonary-vascular-disease-reversible-with-ppar-%C3%A9-agonists
#16
Peter Afdal, Antoine F AbdelMassih
Severe angio-obliterative pulmonary vascular disease (PAH) remains a disease characterized by great morbidity and shortened survival. Unfortunately, the only currently available treatments for angio-obliterative changes are palliative in the form of pulmonary vasodilators evolving from the phosphodiesterase inhibitor sildenafil to endothelin receptor antagonist: Bosentan; while the only definitive treatment is lung transplantation which remains dependent on the availability of donors and the transplant policies which vary widely from a country to another...
February 12, 2018: Microcirculation: the Official Journal of the Microcirculatory Society, Inc
https://www.readbyqxmd.com/read/29432486/fractal-analysis-of-plaque-border-a-novel-method-for-the-quantification-of-atherosclerotic-plaque-contour-irregularity-is-associated-with-pro-atherogenic-plasma-lipid-profile-in-subjects-with-non-obstructive-carotid-stenoses
#17
Francesco Moroni, Marco Magnoni, Vittoria Vergani, Enrico Ammirati, Paolo G Camici
BACKGROUND AND AIMS: Plaque border irregularity is a known imaging characteristic of vulnerable plaques, but its evaluation heavily relies on subjective evaluation and operator expertise. Aim of the present work is to propose a novel fractal-analysis based method for the quantification of atherosclerotic plaque border irregularity and assess its relation with cardiovascular risk factors. METHODS AND RESULTS: Forty-two asymptomatic subjects with carotid stenosis underwent ultrasound evaluation and assessment of cardiovascular risk factors...
2018: PloS One
https://www.readbyqxmd.com/read/29431119/hypermetabolic-macrophages-in-rheumatoid-arthritis-and-coronary-artery-disease-due-to-glycogen-synthase-kinase-3b-inactivation
#18
Markus Zeisbrich, Rolando E Yanes, Hui Zhang, Ryu Watanabe, Yinyin Li, Lukas Brosig, Jison Hong, Barbara B Wallis, John C Giacomini, Themistocles L Assimes, Jörg J Goronzy, Cornelia M Weyand
OBJECTIVES: Accelerated atherosclerotic disease typically complicates rheumatoid arthritis (RA), leading to premature cardiovascular death. Inflammatory macrophages are key effector cells in both rheumatoid synovitis and the plaques of coronary artery disease (CAD). Whether both diseases share macrophage-dependent pathogenic mechanisms is unknown. METHODS: Patients with RA or CAD (at least one myocardial infarction) and healthy age-matched controls were recruited into the study...
February 3, 2018: Annals of the Rheumatic Diseases
https://www.readbyqxmd.com/read/29425936/oxidized-low-density-lipoproteins-the-bridge-between-atherosclerosis-and-autoimmunity-possible-implications-in-accelerated-atherosclerosis-and-for-immune-intervention-in-autoimmune-rheumatic-disorders
#19
REVIEW
Claudia Floriana Suciu, Marcella Prete, Piero Ruscitti, Elvira Favoino, Roberto Giacomelli, Federico Perosa
Atherosclerotic vasculopathy is a multifactorial process causing vessels damage and cardiovascular diseases, the leading causes of death worldwide. Atherosclerotic plaque is the asymptomatic primary, elementary, lesion of atherosclerotic vasculopathy. Accumulation of the oxidized low-density lipoprotein (oxLDL) at sub endothelial sites is now recognized as one of the major trigger events in plaque formation. The concomitant presence at the plaque site of cells belonging to either natural or adaptive immunity, the detection of autoantibodies to oxLDL, the cross-reactivity of oxLDL with anti-phospholipid antibodies, in addition to the clinical evidence of increased rates of cardiovascular events in several rheumatic diseases, has stimulated intensive research to define interconnections between the immune system and traditional risk factors at the molecular levels in order to explain accelerated atherosclerosis...
February 6, 2018: Autoimmunity Reviews
https://www.readbyqxmd.com/read/29425894/diabetic-macroangiopathy-pathogenetic-insights-and-novel-therapeutic-approaches-with-focus-on-high-glucose-mediated-vascular-damage
#20
REVIEW
Rosalinda Madonna, Damiana Pieragostino, Carmela Rita Balistreri, Claudia Rossi, Yong-Jian Geng, Piero Del Boccio, Raffaele De Caterina
Diabetic macroangiopathy - a specific form of accelerated atherosclerosis - is characterized by intra-plaque new vessel formation due to excessive/abnormal neovasculogenesis and angiogenesis, increased vascular permeability of the capillary vessels, and tissue edema, resulting in frequent atherosclerotic plaque hemorrhage and plaque rupture. Mechanisms that may explain the premature and rapidly progressive nature of atherosclerosis in diabetes are multiple, and to a large extent still unclear. However, mechanisms related to hyperglycemia certainly play an important role...
February 6, 2018: Vascular Pharmacology
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