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Plaque composition

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https://www.readbyqxmd.com/read/28207427/progression-and-characterization-of-the-accelerated-atherosclerosis-in-iliac-artery-of-new-zealand-white-rabbits-effect-of-simvastatin
#1
Jitendra S Kanshana, Vivek Khanna, Vishal Singh, Manish Jain, Ankita Misra, Sachin Kumar, Mariya Farooqui, Manoj K Barthwal, Madhu Dikshit
OBJECTIVE: Although atherosclerosis is described in New Zealand White rabbit's iliac artery, yet details of time-dependent atherosclerosis progression are not well known. Further, a well characterized accelerated model of atherosclerosis is also required for the screening of candidate drugs to target specific steps of atherosclerosis development. The present study extensively characterizes the time-dependent plaque composition and functional responses of the atherosclerosis in rabbit iliac artery and its modification by simvastatin...
February 14, 2017: Journal of Cardiovascular Pharmacology
https://www.readbyqxmd.com/read/28188022/interplay-between-hsp90-and-nrf2-pathways-in-diabetes-associated-atherosclerosis
#2
Iolanda Lazaro, Ainhoa Oguiza, Carlota Recio, Laura Lopez-Sanz, Susana Bernal, Jesus Egido, Carmen Gomez-Guerrero
INTRODUCTION: Oxidative stress and inflammation are determinant processes in the development of diabetic vascular complications. Heat shock protein 90 (HSP90) overexpression in atherosclerotic plaques plays a role in sustaining inflammatory mechanisms, and its specific inhibition prevents atherosclerosis. The present work investigates, in a mouse model of diabetes-driven atherosclerosis, whether atheroprotection by pharmacological HSP90 inhibition is accomplished by bolstering antioxidant defense mechanisms headed by nuclear factor erythroid-derived 2-like 2 (Nrf2)...
February 7, 2017: Clínica e Investigación en Arteriosclerosis
https://www.readbyqxmd.com/read/28187866/the-effects-of-statin-therapy-on-carotid-plaque-composition-and-volume-a-systematic-review-and-meta-analysis
#3
Waleed Brinjikji, Vance T Lehman, David F Kallmes, Alejandro A Rabinstein, Giuseppe Lanzino, Hassan M Murad, Sharon Mulvagh, James Klaas, Jonathan Graff-Radford, Kevin J DeMarco, John Huston Iii
BACKGROUND AND PURPOSE: Prior studies have demonstrated that statin use stabilizes and diminishes atherosclerotic lesions. The main objective of this systematic review and meta-analysis was to study the effects of statin therapy on carotid plaque composition as seen on serial high-resolution carotid plaque MRI. We hypothesized that statin therapy would result in significant improvements in lipid-rich-necrotic-core (LRNC) volumes, wall volumes and lumen volumes. MATERIALS AND METHODS: Prospective studies using serial high-resolution carotid plaque MRI (1...
February 7, 2017: Journal of Neuroradiology. Journal de Neuroradiologie
https://www.readbyqxmd.com/read/28181118/brain-uptake-and-safety-of-flutemetamol-f-18-injection-in-japanese-subjects-with-probable-alzheimer-s-disease-subjects-with-amnestic-mild-cognitive-impairment-and-healthy-volunteers
#4
Takami Miki, Hiroyuki Shimada, Jae-Seung Kim, Yasuji Yamamoto, Masakazu Sugino, Hisatomo Kowa, Kerstin Heurling, Michelle Zanette, Paul F Sherwin, Michio Senda
OBJECTIVE: This Phase 2 study assessed the performance of positron emission tomography (PET) brain images made with Flutemetamol F 18 Injection in detecting β-amyloid neuritic plaques in Japanese subjects. METHODS: Seventy subjects (25 with probable Alzheimer's disease (pAD), 20 with amnestic mild cognitive impairment (aMCI), and 25 cognitively normal healthy volunteers[HVs]) underwent PET brain imaging after intravenous Flutemetamol F 18 Injection (185 MBq). Images were interpreted as normal or abnormal for neuritic plaque density by each of five non-Japanese and five Japanese readers who were blinded to clinical data...
February 8, 2017: Annals of Nuclear Medicine
https://www.readbyqxmd.com/read/28160261/imaging-of-the-ulcerated-carotid-atherosclerotic-plaque-a-review-of-the-literature
#5
REVIEW
Vasileios Rafailidis, Ioannis Chryssogonidis, Thomas Tegos, Konstantinos Kouskouras, Afroditi Charitanti-Kouridou
: Carotid atherosclerotic disease constitutes a major modern health problem whose diagnosis primarily relies on imaging. Grading of stenosis has been long used as the main factor for risk stratification and guiding of management. Nevertheless, increasing evidence has shown that additional plaque characteristics such as plaque composition and surface morphology play an important role in the occurrence of symptoms, justifying the term "vulnerable plaque". Carotid plaque surface characteristics either in the form of surface irregularities or ulceration represent an important factor of vulnerability and are associated with the occurrence of neurologic symptoms...
February 3, 2017: Insights Into Imaging
https://www.readbyqxmd.com/read/28157944/simultaneous-imaging-of-atherosclerotic-plaque-composition-and-structure-with-dual-mode-photoacoustic-and-optical-coherence-tomography
#6
Shanshan Shang, Zhongjiang Chen, Yue Zhao, Sihua Yang, Da Xing
The composition of plaque is a major determinant of coronary-related clinical syndromes. By combining photoacoustic tomography (PAT) and optical coherence tomography (OCT), the optical absorption and scattering properties of vascular plaque can be revealed and subsequently used to distinguish the plaque composition and structure. The feasibility and capacity of the dual-mode PAT-OCT technique for resolving vascular plaque was first testified by plaque composition mimicking experiment. PAT obtained lipid information due to optical absorption differences, while owing to scattering differences, OCT achieved imaging of collagen...
January 23, 2017: Optics Express
https://www.readbyqxmd.com/read/28153351/non-invasive-identification-of-vulnerable-atherosclerotic-plaques-using-texture-analysis-in-ultrasound-carotid-elastography-an-in%C3%A2-vivo-feasibility-study-validated-by-magnetic-resonance-imaging
#7
Chengwu Huang, Qiong He, Manwei Huang, Lingyun Huang, Xihai Zhao, Chun Yuan, Jianwen Luo
The aims of this study were to quantify the textural information of strain rate images in ultrasound carotid elastography and evaluate the feasibility of using the textural features in discriminating stable and vulnerable plaques with magnetic resonance imaging as an in vivo reference. Ultrasound radiofrequency data were acquired in 80 carotid plaques from 52 patients, mainly in the longitudinal imaging view, and axial strain rate images were estimated with an ultrasound carotid elastography technique based on an optical flow algorithm...
January 30, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28149461/microbiological-characterization-and-effect-of-resin-composites-in-cervical-lesions
#8
Bonfanti Carlo, Nicola Barabanti, Giorgio Piccinelli, Vicente Faus-Matoses, Antonio Cerutti
BACKGROUND: Non carious cervical lesions associated to muscle hyperfunctions are increasing. Microhybrid resin composites are used to restore cervical abfractions. The purpose of this study was to investigate if resin composites modify tooth plaque, inducing an increment of cariogenic microflora and evaluate their effect, in vivo and in vitro, against S. mutans. MATERIAL AND METHODS: Eight abfractions were restored with two microhybrid resin composites (Venus, Heraeus-Kulzer® and Esthet-X, Dentsply®), after gnatological therapy, in three patients with muscle hyperfunctions...
January 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28143895/raman-spectroscopic-imaging-of-human-macrophages-incubated-with-triglyceride-enriched-oxldl-visualizes-translocation-of-lipids-between-endocytic-vesicles-and-lipid-droplets
#9
Clara Stiebing, Lisa Schmoelz, Maria Wallert, Christian Matthaeus, Stefan Lorkowski, Juergen Popp
Raman spectroscopic imaging was used to investigate the uptake of oxidized low-density lipoproteins (oxLDL) by human macrophages. To better understand the receptor-mediated pathway and the intracellular fate of modified lipoproteins is of foremost interest with regard to the development of atherosclerotic plaques. To obtain information on the storage process of lipids caused by oxLDL uptake, Raman spectroscopic imaging was used because of its unique chemical specificity, especially for lipids. For the present study, a protocol was established to incorporate deuterated tripalmitate into oxLDL...
January 31, 2017: Journal of Lipid Research
https://www.readbyqxmd.com/read/28120199/a-comprehensive-profiling-of-supragingival-bacterial-composition-in-chinese-twin-children-and-their-mothers
#10
Qin Du, Mingyun Li, Xuedong Zhou, Kun Tian
To investigate the factors influencing the oral microbiome, 16 twin pairs and their mothers were enrolled in this study. There were 7 monozygotic (MZ) twins and 9 dizygotic (DZ) twins, with an average age of 6.18 ± 3.5. Supragingival plaques and caries tissues were collected and the 16S rDNA was analyzed by 454 pyrosequencing. A total of 18 phyla and 179 genuses were found. Caries children harbored a higher portion of Actinobacteria than caries-free ones, and one lineage was found to be less abundant in the caries tissues compared to the supragingival plaque at each level from the phylum down to the genus level, which was Fusobacteria at Phylum, Fusobacteriia at Class, Fusobacteriales at Order, Leptotrichiaceae at Family and Leptotrichia at genus level...
January 24, 2017: Antonie Van Leeuwenhoek
https://www.readbyqxmd.com/read/28115671/mosquito-exposure-and-chikungunya-and-dengue-infection-among-travelers-during-the-chikungunya-outbreak-in-the-americas
#11
David A Lindholm, Todd Myers, Susana Widjaja, Edward M Grant, Kalyani Telu, Tahaniyat Lalani, Jamie Fraser, Mary Fairchok, Anuradha Ganesan, Mark D Johnson, Anjali Kunz, David R Tribble, Heather C Yun
Travelers are at risk for arbovirus infection. We prospectively enrolled 267 Department of Defense beneficiaries traveling to chikungunya-outbreak regions in the Americas between December 2013 and May 2015 and assessed travel characteristics and serologic exposure to chikungunya virus (CHIKV) and dengue virus (DENV). Ten ill returning travelers were also assessed retrospectively. Self-reported mosquito exposure was common (64% of 198 evaluable travelers saw mosquitoes; 53% of 201 reported ≥ 1 bite). Increased exposure was associated with active-duty travelers (odds ratio [OR] = 2...
January 23, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28115186/red-fluorescence-of-dental-plaque-in-children-a-cross-sectional-study
#12
Catherine M C Volgenant, Egija Zaura, Bernd W Brandt, Mark J Buijs, Marisol Tellez, Gayatri Malik, Amid I Ismail, Jacob M Ten Cate, Monique H van der Veen
OBJECTIVES: The relation between the presence of red fluorescent plaque and the caries status in children was studied. In addition, the microbial composition of dental plaque from sites with red fluorescent plaque (RFP) and from sites with no red fluorescent plaque (NFP) was assessed. METHODS: Fluorescence photographs were taken from fifty children (6-14 years old) with overnight plaque. Full-mouth caries scores (ICDAS II) were obtained. The composition of a saliva sample and two plaque samples (RFP and NFP) was assessed using 16S rDNA sequencing...
January 20, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28113313/real-time-intravascular-ultrasound-and-photoacoustic-imaging
#13
Don VanderLaan, Andrei Karpiouk, Doug Yeager, Stanislav Emelianov
Combined intravascular ultrasound and photoacoustic imaging (IVUS/IVPA) is an emerging hybrid modality being explored as a means of improving the characterization of atherosclerotic plaque anatomical and compositional features. While initial demonstrations of the technique have been encouraging, they have been limited by catheter rotation and data acquisition, displaying and processing rates on the order of several seconds per frame as well as the use of off-line image processing. Herein, we present a complete IVUS/IVPA imaging system and method capable of real-time IVUS/IVPA imaging, with online data acquisition, image processing and display of both IVUS and IVPA images...
December 15, 2016: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/28109934/coronary-plaque-burden-and-adverse-plaque-characteristics-are-increased-in-healthy-relatives-of-patients-with-early-onset-coronary-artery-disease
#14
Morten K Christiansen, Jesper M Jensen, Bjarne L Nørgaard, Damini Dey, Hans Erik Bøtker, Henrik K Jensen
OBJECTIVES: This study characterized and quantified subclinical atherosclerosis by coronary computed tomography angiography (CTA) in first-degree relatives of patients with early onset coronary artery disease (CAD). BACKGROUND: A strong family history of CAD is an important risk factor for adverse cardiovascular events. Whether predisposed individuals suffer an increased burden of coronary atherosclerosis and adverse plaque features is not known. METHODS: We included 88 healthy middle-aged first-degree relatives from 59 families with early onset CAD...
January 12, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28107247/plaque-burden-microstructures-and-compositions-underachieving-very-low-ldl-c-levels
#15
Yu Kataoka, Jordan Andrews, Rishi Puri, Peter J Psaltis, Stephen J Nicholls
PURPOSE OF REVIEW: To summarize the impact of lowering LDL-C on plaque progression, microstructures and compositions. RECENT FINDINGS: Low-density lipoprotein cholesterol (LDL-C) is a major therapeutic target to prevent atherosclerotic cardiovascular disease. Intravascular imaging has elucidated antiatherosclerotic effects of lowering LDL-C in vivo. Intensive control of LDL-C with a statin has been shown to slow plaque progression and induce its regression if very low LDL-C level is achieved...
January 19, 2017: Current Opinion in Endocrinology, Diabetes, and Obesity
https://www.readbyqxmd.com/read/28106774/effects-of-long-term-water-aging-on-novel-anti-biofilm-and-protein-repellent-dental-composite
#16
Ning Zhang, Ke Zhang, Mary A S Melo, Michael D Weir, David J Xu, Yuxing Bai, Hockin H K Xu
The aims of this study were to: (1) synthesize an anti-biofilm and protein-repellent dental composite by combining 2-methacryloyloxyethyl phosphorylcholine (MPC) with quaternary ammonium dimethylaminohexadecyl methacrylate (DMAHDM); and (2) evaluate the effects of water-aging for 180 days on protein resistance, bacteria-killing ability, and mechanical properties of MPC-DMAHDM composite. MPC and DMAHDM were added into a resin composite. Specimens were stored in distilled water at 37 °C for 1, 30, 90, and 180 days...
January 18, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28098506/capsicum-annuum-var-grossum-bell-pepper-inhibits-%C3%AE-secretase-activity-and-%C3%AE-amyloid1-40-aggregation
#17
Omodesola Oluwafisayo Ogunruku, Ganiyu Oboh, Sabina Passamonti, Federica Trammer, Aline Augusti Boligon
The deposition of amyloid protein as senile plaques is the major signature of Alzheimer's disease (AD). It is produced by the sequential cleavage of the amyloid precursor protein by secretases. Moreover, peppers are noted for their antiaging and cognitive enhancing properties. Thus, in this study, the effects of polyphenol-rich extracts from bell pepper on amyloid production and aggregation in vitro were investigated. Bell pepper (ripe and unripe) was extracted with methanol-1 N HCl (1:1 v/v). Thereafter, the inhibitory potentials of the extracts on β-secretase and β-amyloid1-40 aggregation were determined...
February 2017: Journal of Medicinal Food
https://www.readbyqxmd.com/read/28095925/the-effect-of-cigarette-smoking-on-the-oral-and-nasal-microbiota
#18
Guoqin Yu, Stephen Phillips, Mitchell H Gail, James J Goedert, Michael S Humphrys, Jacques Ravel, Yanfang Ren, Neil E Caporaso
BACKGROUND: The goal of the study was to investigate whether cigarette smoking alters oral and nasal microbial diversity, composition, and structure. Twenty-three current smokers and 20 never smokers were recruited. From each subject, nine samples including supra and subgingiva plaque scrapes, saliva, swabs from five soft oral tissue sites, and one nasal swab from both the anterior nares were collected. 16S rRNA V3-V4 region was sequenced for microbial profiles. RESULTS: We found that alpha diversity was lower in smokers than in nonsmokers in the buccal mucosa, but in other sample sites, microbial diversity and composition were not significantly different by smoking status...
January 17, 2017: Microbiome
https://www.readbyqxmd.com/read/28092507/real-time-intravascular-ultrasound-and-photoacoustic-imaging
#19
Donald VanderLaan, Andrei B Karpiouk, Doug Yeager, Stanislav Emelianov
Combined intravascular ultrasound and intravascular photoacoustic (IVUS/IVPA) imaging is an emerging hybrid modality being explored as a means of improving the characterization of atherosclerotic plaque anatomical and compositional features. While initial demonstrations of the technique have been encouraging, they have been limited by catheter rotation and data acquisition, displaying, and processing rates on the order of several seconds per frame as well as the use of off-line image processing. Herein, we present a complete IVUS/IVPA imaging system and method capable of real-time IVUS/IVPA imaging, with online data acquisition, image processing, and display of both IVUS and IVPA images...
January 2017: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/28071288/vulnerable-carotid-plaque-imaging-and-histopathology-without-a-dedicated-mri-receiver-coil
#20
Laura A Fitzpatrick, Nadav Berkovitz, Marlise P Dos Santos, Nevin Majeed, Rafael Glikstein, Santanu Chakraborty, John P Veinot, Grant Stotts, Alain Berthiaume, Robert Chatelain
Stroke is associated with vulnerable carotid artery plaques showing specific histopathologic features, namely a lipid-rich necrotic core, intraplaque hemorrhage, ulceration, and thin fibrous cap. While ultrasound and computed tomography (CT) can identify carotid plaques and determine the extent of stenosis, magnetic resonance imaging (MRI) provides further information regarding plaque composition and morphology. In this feasibility study, three patients with symptomatic, moderately stenosed plaques were imaged with CT angiography (CTA) and MRI (3T and 1...
January 1, 2017: Neuroradiology Journal
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