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Plaque composition

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https://www.readbyqxmd.com/read/28722196/safety-of-orbital-atherectomy-in-patients-with-left-ventricular-systolic-dysfunction
#1
Evan Shlofmitz, Perwaiz Meraj, Rajiv Jauhar, Sanjum S Sethi, Richard A Shlofmitz, Michael S Lee
OBJECTIVES: We evaluated the angiographic and clinical outcomes in patients with severely calcified lesions and systolic dysfunction who underwent orbital atherectomy (OA). We hypothesized that OA would provide similar outcomes in patients with systolic dysfunction compared with patients with preserved systolic function. BACKGROUND: Systolic dysfunction is associated with an increased risk of adverse clinical events after percutaneous coronary intervention (PCI)...
July 19, 2017: Journal of Interventional Cardiology
https://www.readbyqxmd.com/read/28718623/a-multimodal-spectroscopic-imaging-method-to-characterize-the-metal-and-macromolecular-content-of-proteinaceous-aggregates-amyloid-plaques
#2
Kelly L Summers, Nicholas Fimognari, Ashley Hollings, Mitchell Kiernan, Virginie Lam, Rebecca J Tidy, David Paterson, Mark J Tobin, Ryu Takechi, Graham N George, Ingrid J Pickering, John C Mamo, Hugh H Harris, Mark J Hackett
Alzheimer's disease (AD) is a major international health and economic concern. A key pathological feature of AD is so-called "amyloid-β-plaques", or "Aβ-plaques", which are deposits of aggregated protein, enriched with the Aβ fragment of amyloid precursor protein. Despite their name, the deposits are not pure Aβ and have a heterogeneous, chemically complex composition that can include multiple proteins, lipids, and metal ions (Fe, Cu, or Zn). Despite extensive research, it is still uncertain whether Aβ-plaques are a cause or a consequence of AD pathology...
July 18, 2017: Biochemistry
https://www.readbyqxmd.com/read/28712815/asymptomatic-carotid-stenosis-is-associated-with-cognitive%C3%A2-impairment
#3
Brajesh K Lal, Moira C Dux, Siddhartha Sikdar, Carly Goldstein, Amir A Khan, John Yokemick, Limin Zhao
BACKGROUND: Cerebrovascular risk factors (eg, hypertension, coronary artery disease) and stroke can lead to vascular cognitive impairment. The Asymptomatic Carotid Stenosis and Cognitive Function study evaluated the isolated impact of asymptomatic carotid stenosis (no prior ipsilateral or contralateral stroke or transient ischemic attack) on cognitive function. Cerebrovascular hemodynamic and carotid plaque characteristics were analyzed to elucidate potential mechanisms affecting cognition...
July 13, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28711401/performance-of-acoustic-radiation-force-impulse-ultrasound-imaging-for-carotid-plaque-characterization-with-histologic-validation
#4
Tomasz J Czernuszewicz, Jonathon W Homeister, Melissa C Caughey, Yue Wang, Hongtu Zhu, Benjamin Y Huang, Ellie R Lee, Carlos A Zamora, Mark A Farber, Joseph J Fulton, Peter F Ford, William A Marston, Raghuveer Vallabhaneni, Timothy C Nichols, Caterina M Gallippi
OBJECTIVE: Stroke is commonly caused by thromboembolic events originating from ruptured carotid plaque with vulnerable composition. This study assessed the performance of acoustic radiation force impulse (ARFI) imaging, a noninvasive ultrasound elasticity imaging method, for delineating the composition of human carotid plaque in vivo with histologic validation. METHODS: Carotid ARFI images were captured before surgery in 25 patients undergoing clinically indicated carotid endarterectomy...
July 13, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28708461/effects-of-four-different-crown-materials-on-the-peri-implant-clinical-parameters-and-composition-of-peri-implant-crevicular-fluid
#5
Shu-Juan Yu, Wen-Ling Shan, Yu-Xiao Liu, Xiao-Yan Huang, Guo-Xiong Zhu
This study aimed to identify the preferred crown material by measuring the peri-implant clinical parameters and the concentrations of receptor activator of nuclear factor-κB ligand (RANKL), osteoprotegerin (OPG), and calcium in peri-implant crevicular fluid (PICF) with four different crown materials. A total of 196 patients with a single missing posterior tooth received crown restoration with cobalt-chromium (Co-Cr) porcelain-fused-to-metal (PFM) (n=50), aurum platinum (Au-Pt) PFM (n=48), titanium (Ti) PFM (n=52), or zirconia (Zi) all-ceramic crown (n=46)...
July 14, 2017: Journal of Oral Implantology
https://www.readbyqxmd.com/read/28707424/a-reproducible-microcosm-biofilm-model-of-subgingival-microbial-communities
#6
M Fernandez Y Mostajo, R A M Exterkate, M J Buijs, W Beertsen, G A van der Weijden, E Zaura, W Crielaard
OBJECTIVE: To develop a reproducible subgingival microcosm biofilm model. MATERIAL AND METHODS: Subgingival plaque samples were collected from four deep pockets (probing pocket depth ≥6 mm) in each of seven patients with periodontitis and from shallow pockets (probing pocket depth ≤3 mm) in two periodontally healthy donors. An active attachment model and a peptone medium (Thompson et. al., Appl Environ Microbiol 2015;81:8307-8314) supplemented with 30% serum was used...
July 14, 2017: Journal of Periodontal Research
https://www.readbyqxmd.com/read/28705824/carotid-plaque-morphology-and-ischemic-vascular-brain-disease-on-mri
#7
Q J A van den Bouwhuijsen, M W Vernooij, B F J Verhaaren, H A Vrooman, W J Niessen, G P Krestin, M A Ikram, O H Franco, A van der Lugt
BACKGROUND AND PURPOSE: Vulnerable carotid plaque components are reported to increase the risk of cerebrovascular events. Yet, the relation between plaque composition and subclinical ischemic brain disease is not known. We studied, in the general population, the association between carotid atherosclerotic plaque characteristics and ischemic brain disease on MR imaging. MATERIALS AND METHODS: From the population-based Rotterdam Study, 951 participants underwent both carotid MR imaging and brain MR imaging...
July 13, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28701638/antibacterial-activity-cytotoxicity-and-mechanical-behavior-of-nano-enhanced-denture-base-resin-with-different-kinds-of-inorganic-antibacterial-agents
#8
Rongrong Chen, Zhihui Han, Zhuoli Huang, Junu Karki, Chenxin Wang, Bangshang Zhu, Xiuyin Zhang
Silanized aluminum borate whiskers (ABWs) of 4 wt%, silanized zirconium dioxide nanoparticles (nano-ZrO2) of 2 wt% were mixed with polymethyl methacrylate (PMMA) powder to get ZrO2-ABWs/PMMA composites. Titanium dioxide (TiO2), silver-supported titanium dioxide (Ag/TiO2), silver-supported zirconium phosphate (Novaron) and tetrapod-like zinc oxide whiskers (T-ZnOw) antibacterial agents of 3 wt% were mixed with ZrO2-ABWs/PMMA composites respectively to fabricate standard specimens. Plaque biofilms on the specimens surface were investigated for colony-forming units (CFUs)...
July 12, 2017: Dental Materials Journal
https://www.readbyqxmd.com/read/28693828/inhibition-of-plaque-progression-and-promotion-of-plaque-stability-by-glucagon-like-peptide-1-receptor-agonist-serial-in%C3%A2-vivo-findings-from-imap-ivus-in-watanabe-heritable-hyperlipidemic-rabbits
#9
Mitsumasa Sudo, Yuxin Li, Takafumi Hiro, Tadateru Takayama, Masako Mitsumata, Masashi Shiomi, Masahiko Sugitani, Taro Matsumoto, Hiroyuki Hao, Atsushi Hirayama
BACKGROUND AND AIMS: Glucagon-like peptide-1 (GLP-1) is thought to inhibit development of aortic atherosclerosis and plaque formation. However, whether GLP-1 stabilizes fully developed atherosclerotic plaque or alters the complicated plaque composition remains unclarified. METHODS: Ten Watanabe heritable hyperlipidemic (WHHL) rabbits were divided into GLP-1 receptor agonist treatment group and control group. After confirmation of atherosclerotic plaques in brachiocephalic arteries by iMap intravascular ultrasound (iMAP-IVUS), GLP-1 receptor agonist lixisenatide was administered to WHHL rabbits at 30 nmoL/kg/day for 12 weeks by osmotic pump...
June 23, 2017: Atherosclerosis
https://www.readbyqxmd.com/read/28679524/relationship-between-serum-inflammatory-marker-levels-and-the-dynamic-changes-in-coronary-plaque-characteristics-after-statin-therapy
#10
RANDOMIZED CONTROLLED TRIAL
Osung Kwon, Soo-Jin Kang, Se Hun Kang, Pil Hyung Lee, Sung-Cheol Yun, Jung-Min Ahn, Duk-Woo Park, Seung-Whan Lee, Young-Hak Kim, Cheol Whan Lee, Ki Hoon Han, Seong-Wook Park, Seung-Jung Park
BACKGROUND: The mechanism of statin for atheroma stabilization remains unclear. We aimed to assess the relationship between on-treatment changes in serum inflammatory biomarker levels and plaque composition in differed nonculprit coronary lesions. METHODS AND RESULTS: The changes in serum biochemical values, and intravascular ultrasound data were evaluated in 218 patients with virtual histology (VH)-intravascular ultrasound-defined fibroatheroma-containing segments after 12-month rosuvastatin treatment...
July 2017: Circulation. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28668306/periodontal-status-in-18-year-old-lithuanian-adolescents-an-epidemiological-study
#11
Eglė Bendoraitienė, Jūratė Zūbienė, Ingrida Vasiliauskienė, Kristina Saldūnaitė, Vilija Andruškevičienė, Nomeda Basevičienė, Eglė Slabšinskienė
OBJECTIVE: The aim of this study was to investigate the periodontal and oral hygiene status of 18-year-old Lithuanian adolescents. MATERIALS AND METHODS: Cross-sectional data were collected by a multistage sampling approach that was used to draw a representative sample of 1063 adolescents attending schools. In total, 20 schools from the alphabetical list of educational institutions in Lithuania agreed to participate. Periodontal status was evaluated using the Periodontal Screening and Recording (PSR) index...
June 23, 2017: Medicina
https://www.readbyqxmd.com/read/28650577/time-dependent-trends-in-cardiovascular-adverse-events-during-follow-up-after-carotid-or-iliofemoral-endarterectomy
#12
I D van Koeverden, S T W van Haelst, S Haitjema, J-P P M de Vries, F L Moll, H M den Ruijter, I E Hoefer, G W Dalmeijer, G J de Borst, G Pasterkamp
BACKGROUND: Recent observations have suggested a decline in vulnerable carotid artery and iliofemoral atherosclerotic plaque characteristics over the past decade. The aim of this study was to determine whether, in the presence of clinically manifest carotid or peripheral artery disease, secondary adverse cardiovascular events decreased over this period. METHODS: Patients included in the Athero-Express biobank between 2003 and 2012 were analysed. During 3-year follow-up, composite cardiovascular endpoints were documented yearly, including: myocardial infarction, coronary interventions, stroke, peripheral interventions and cardiovascular death...
June 26, 2017: British Journal of Surgery
https://www.readbyqxmd.com/read/28649497/spectral-analysis-assisted-photoacoustic-imaging-for-lipid-composition-differentiation
#13
Yingchun Cao, Ayeeshik Kole, Lu Lan, Pu Wang, Jie Hui, Michael Sturek, Ji-Xin Cheng
Recent advances in atherosclerotic plaque detection have shown that not only does lipid core size and depth play important roles in plaque rupture and thrombi formation, but lipid composition, especially cholesterol deposition, is equally important in determining lesion vulnerability. Here, we demonstrate a spectral analysis assisted photoacoustic imaging approach to differentiate and map lipid compositions within an artery wall. The approach is based on the classification of spectral curves obtained from the sliding windows along time-of-flight photoacoustic signals via a numerical k-means clustering method...
September 2017: Photoacoustics
https://www.readbyqxmd.com/read/28646792/bacterial-profile-in-human-atherosclerotic-plaques
#14
Annika Lindskog Jonsson, Frida Fåk Hållenius, Rozita Akrami, Elias Johansson, Per Wester, Conny Arnerlöv, Fredrik Bäckhed, Göran Bergström
BACKGROUND AND AIMS: Several studies have confirmed the presence of bacterial DNA in atherosclerotic plaques, but its contribution to plaque stability and vulnerability is unclear. In this study, we investigated whether the bacterial plaque-profile differed between patients that were asymptomatic or symptomatic and whether there were local differences in the microbial composition within the plaque. METHODS: Plaques were removed by endarterectomy from asymptomatic and symptomatic patients and divided into three different regions known to show different histological vulnerability: A, upstream of the maximum stenosis; B, site for maximum stenosis; C, downstream of the maximum stenosis...
June 8, 2017: Atherosclerosis
https://www.readbyqxmd.com/read/28642677/a-novel-workflow-combining-plaque-imaging-plaque-and-plasma-proteomics-identifies-biomarkers-of-human-coronary-atherosclerotic-plaque-disruption
#15
Regent Lee, Roman Fischer, Philip D Charles, David Adlam, Alessandro Valli, Katalin Di Gleria, Rajesh K Kharbanda, Robin P Choudhury, Charalambos Antoniades, Benedikt M Kessler, Keith M Channon
BACKGROUND: Atherosclerotic plaque rupture is the culprit event which underpins most acute vascular syndromes such as acute myocardial infarction. Novel biomarkers of plaque rupture could improve biological understanding and clinical management of patients presenting with possible acute vascular syndromes but such biomarker(s) remain elusive. Investigation of biomarkers in the context of de novo plaque rupture in humans is confounded by the inability to attribute the plaque rupture as the source of biomarker release, as plaque ruptures are typically associated with prompt down-stream events of myocardial necrosis and systemic inflammation...
2017: Clinical Proteomics
https://www.readbyqxmd.com/read/28639927/carotid-artery-plaque-vulnerability-assessment-using-noninvasive-ultrasound-elastography-validation-with-mri
#16
Marie-Hélène Roy Cardinal, Maarten H G Heusinkveld, Zhao Qin, Richard G P Lopata, Cyrille Naim, Gilles Soulez, Guy Cloutier
OBJECTIVE: Vulnerable and nonvulnerable carotid artery plaques have different tissue morphology and composition that may affect plaque biomechanics. The objective of this study is to evaluate plaque vulnerability with the use of ultrasound noninvasive vascular elastography (NIVE). MATERIALS AND METHODS: Thirty-one patients (mean [± SD] age, 69 ± 7 years) with stenosis of the internal carotid artery of 50% or greater were enrolled in this cross-sectional study...
July 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28629561/multi-contrast-and-three-dimensional-assessment-of-the-aortic-wall-using-3t-mri
#17
Thomas Wehrum, Iulius Dragonu, Christoph Strecker, Jürgen Hennig, Andreas Harloff
OBJECTIVES: To develop a 3D-multi-contrast MRI protocol allowing for high resolution imaging of the wall and of atheroma in the thoracic aorta. METHODS: Eleven healthy volunteers and eleven acute stroke patients with aortic plaques detected by TEE underwent MRI at 3T. The MRI-protocol consisted of a T1w-bright-blood, a T2w- and a PDw-black-blood sequence (spatial resolution=1.15mm(3)). Image quality was assessed by two blinded investigators using a 3-point score and intra- and inter-rater agreement was tested...
June 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28617990/cell-specific-diversity-in-the-expression-and-organization-of-cytoplasmic-plaque-proteins-of-apical-junctions
#18
Ekaterina Vasileva, Sophie Sluysmans, Marie-Luce Bochaton-Piallat, Sandra Citi
Tight and adherens junctions play critical roles in the barrier, adhesion, and signaling functions of epithelial and endothelial cells. How the molecular organization of these junctions is tuned to the widely diverse physiological requirements of each tissue type is not well understood. Here, we address this question by examining the expression, localization, and interactions of major cytoplasmic plaque proteins of tight and adherens junctions in different cultured epithelial and endothelial cell lines. Immunoblotting and immunofluorescence analyses show that the expression profiles of cingulin, paracingulin, ZO-1, ZO-2, ZO-3, PLEKHA7, afadin, PDZD11, p120-catenin, and α-catenin, as well as the transmembrane junctional proteins occludin, E-cadherin, and VE-cadherin, are significantly diverse when comparing kidney cells (MDCK, mCCD), keratinocytes (HaCaT), lung carcinoma (A427, A549), and endothelium-derived cells (bEnd...
June 15, 2017: Annals of the New York Academy of Sciences
https://www.readbyqxmd.com/read/28594333/quantification-of-carotid-artery-plaque-stability-with-multiple-region-of-interest-based-ultrasound-strain-indices-and-relationship-with-cognition
#19
Nirvedh Meshram, Tomy Varghese, Carol Mitchell, Daren Jackson, Stephanie Wilbrand, Bruce Hermann, Robert Dempsey
Vulnerability and instability in carotid artery plaque has been assessed based on strain variations using noninvasive ultrasound imaging. We previously demonstrated that carotid plaques with higher strain indices in a region of interest (ROI) correlated to patients with lower cognition, probably due to cerebrovascular emboli arising from these unstable plaques. This work attempts to characterize the strain distribution throughout the entire plaque region instead of being restricted to a single localized ROI...
June 8, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28592134/circulating-annexin-a5-levels-are-associated-with-carotid-intima-media-thickness-but-not-coronary-plaque-composition
#20
Mathias Burgmaier, Sebastian Reith, Leon Schurgers, Florian Kahles, Nikolaus Marx, Chris Reutelingsperger
BACKGROUND: Annexin A5 (anxA5) is involved in processes which are crucial in atherogenesis. However, anxA5's relationship with atherosclerotic lesion extension and plaque composition in high-risk patients with type 2 diabetes remains unclear. Thus, we characterized the association between circulating anxA5 levels with atherosclerotic burden and coronary plaque composition in diabetes mellitus patients. METHODS: Intima-media thickness was determined in 96 diabetes mellitus patients with stable coronary artery disease...
June 1, 2017: Diabetes & Vascular Disease Research
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