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https://www.readbyqxmd.com/read/28333905/-the-inflammatory-processes-in-atherogenesis
#1
Natalia Cichoń, Dominika Lach, Angela Dziedzic, Michał Bijak, Joanna Saluk
Atherogenesis is the process of atherosclerotic plaque formation, leading to coronary artery heart disease. This process involves immune cells, mainly T and B cells, monocytes and macrophages. The process of atherogenesis is induced by inflammatory damage of endothelial cells. The characteristic construction features of the atherosclerotic plaque is a predisposing factor for acute coronary syndromes. The accumulation of inflammatory cells in the artery inner membrane enhances the local inflammatory process due to the secretion of reactive oxygen species, inflammatory cytokines and metalloproteinases, which accelerate the development of atherosclerotic lesions in the arteries...
March 21, 2017: Polski Merkuriusz Lekarski: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/28330651/serial-assessment-of-tissue-precursors-and%C3%A2-progression-of-coronary-calcification-analyzed-by-fusion-of-ivus-and-oct-5-year-follow-up-of-scaffolded-and-nonscaffolded-arteries
#2
Yaping Zeng, Hiroki Tateishi, Rafael Cavalcante, Erhan Tenekecioglu, Pannipa Suwannasom, Yohei Sotomi, Carlos Collet, Shaoping Nie, Hans Jonker, Jouke Dijkstra, Maria D Radu, Lorenz Räber, Dougal R McClean, Robert-Jan van Geuns, Evald H Christiansen, Therese Fahrni, Jacques Koolen, Yoshinobu Onuma, Nico Bruining, Patrick W Serruys
OBJECTIVES: The aim of this study was to assess calcium growth with fused grayscale intravascular ultrasound (IVUS), IVUS-virtual histology, and optical coherence tomography (OCT) from baseline to 5-year follow-up in patients treated with bioresorbable vascular scaffolds. BACKGROUND: IVUS and OCT have individual strengths in assessing plaque composition and volume. Fusion of images obtained using these methods could potentially aid in coronary plaque assessment...
March 10, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28329036/predictive-value-of-plaque-morphology-assessed-by-frequency-domain-optical-coherence-tomography-for-impaired-microvascular-perfusion-after-elective-stent-implantation-the-intracoronary-electrocardiogram-study
#3
Hiroki Ikenaga, Satoshi Kurisu, Tsukasa Nakao, Shingo Kono, Yoji Sumimoto, Noriaki Watanabe, Takashi Shimonaga, Tadanao Higaki, Toshitaka Iwasaki, Naoya Mitsuba, Ken Ishibashi, Yoshihiro Dohi, Yukihiro Fukuda, Yasuki Kihara
Aims: This study was undertaken to assess the association between plaque features at culprit lesions assessed by frequency-domain optical coherence tomography (FD-OCT) and impaired microvascular perfusion estimated by intracoronary electrocardiogram (IcECG) after elective percutaneous coronary intervention (PCI). Furthermore, we investigated whether IcECG could predict future cardiac events. Methods and results: This study consisted of 84 patients who underwent both FD-OCT and IcECG during PCI...
March 7, 2017: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/28304220/high-resolution-magnetic-resonance-imaging-of-carotid-atherosclerotic-plaques-a-correlation-study-with-histopathology
#4
Zhangyong Xia, Hua Yang, Xiaochun Yuan, Jiyue Wang, Shigang Zhang, Liyong Zhang, Yang Qu, Jun Chen, Liqun Jiao, Le-Xin Wang, Yifeng Du
BACKGROUND: This study aimed to utilize high-resolution magnetic resonance imaging (MRI) to investigate the characteristics of stable and vulnerable carotid arteriosclerotic plaques, with correlations to histopathological findings. PATIENTS AND METHODS: High-resolution MRI was performed in 817 patients, using three-dimensional magnetic resonance angiography. Plaque composition was evaluated by measuring the areas occupied by calcification, a lipid-rich necrotic core, intra-plaque haemorrhage, and fibrous cap rupture...
March 17, 2017: VASA. Zeitschrift Für Gefässkrankheiten
https://www.readbyqxmd.com/read/28283548/smooth-muscle-cell-specific-deletion-of-col15a1-unexpectedly-leads-to-impaired-development-of-advanced-atherosclerotic-lesions
#5
Brittany G Durgin, Olga A Cherepanova, Delphine Gomez, Themistoclis Karaoli, Gabriel F Alencar, Joshua T Butcher, Yu-Qing Zhou, Michelle P Bendeck, Brant E Isakson, Gary K Owens, Jessica J Connelly
Atherosclerotic plaque rupture with subsequent embolic events is a major cause of sudden death from myocardial infarction or stroke. Although smooth muscle cells (SMC) produce and respond to collagens in vitro, there is no direct evidence in vivo that SMC are a crucial source of collagens and that this impacts lesion development or fibrous cap formation. We sought to determine how conditional SMC specific knockout of collagen type XV (COL15A1) in SMC lineage tracing mice affects advanced lesion formation given: 1) we previously identified a Col15a1 sequence variant associated with age related atherosclerosis; 2) COL15A1 is a matrix organizer enhancing tissue structural integrity; and 3) siRNA mediated Col15a1 knockdown increased migration and decreased proliferation of cultured human SMC...
March 10, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28281026/neoatherosclerosis-assessed-with-optical-coherence-tomography-in-restenotic-bare-metal-and-first-and-second-generation-drug-eluting-stents
#6
Lei Song, Gary S Mintz, Dong Yin, Myong Hwa Yamamoto, Chee Yang Chin, Mitsuaki Matsumura, Khady Fall, Ajay J Kirtane, Manish A Parikh, Jeffrey W Moses, Ziad A Ali, Richard A Shlofmitz, Akiko Maehara
Although reported in bare metal stents (BMS) and first-generation drug-eluting stents (DES), little is known about neoatherosclerosis in second-generation DES. We used optical coherence tomography to evaluate neoatherosclerosis among different stent generations. Overall, 274 in-stent restenosis (ISR) lesions (duration from implantation 56.9 ± 47.2 months) in 274 patients were assessed for the presence of neoatherosclerosis. Neoatherosclerosis was identified in 38.7% of lesions (106/274): 23.0% second-generation DES (38/165), 65...
March 9, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28279371/carotid-plaque-lipid-content-and-fibrous-cap-status-predict-systemic-cv-outcomes-the-mri-substudy-in-aim-high
#7
Jie Sun, Xue-Qiao Zhao, Niranjan Balu, Moni B Neradilek, Daniel A Isquith, Kiyofumi Yamada, Gádor Cantón, John R Crouse, Todd J Anderson, John Huston, Kevin O'Brien, Daniel S Hippe, Nayak L Polissar, Chun Yuan, Thomas S Hatsukami
OBJECTIVES: The aim of this study was to investigate whether and what carotid plaque characteristics predict systemic cardiovascular outcomes in patients with clinically established atherosclerotic disease. BACKGROUND: Advancements in atherosclerosis imaging have allowed assessment of various plaque characteristics, some of which are more directly linked to the pathogenesis of acute cardiovascular events compared to plaque burden. METHODS: As part of the event-driven clinical trial AIM-HIGH (Atherothrombosis Intervention in Metabolic Syndrome with Low HDL/High Triglycerides: Impact on Global Health Outcomes), subjects with clinically established atherosclerotic disease underwent multicontrast carotid magnetic resonance imaging (MRI) to detect plaque tissue composition and high-risk features...
March 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28214139/accuracy-of-computed-tomography-angiography-to-identify-thin-cap-fibroatheroma-detected-by-optical-coherence-tomography
#8
Nobuo Tomizawa, Kodai Yamamoto, Shinichi Inoh, Takeshi Nojo, Sunao Nakamura
BACKGROUND: Thin-cap fibroatheroma (TCFA) is assumed to cause acute coronary syndromes. OBJECTIVE: To compare the accuracy of different models for diagnosing TCFA using parameters derived by CT, validated against optical coherence tomography (OCT). METHODS: One hundred twenty-nine plaques in 106 patients were analyzed using data acquired by 64-row CT with a reconstruction thickness of 0.67 mm and an increment of 0.33 mm. TCFA was defined by OCT as a plaque with lipid content in ≥2 quadrants and the thinnest part of the fibrous cap measuring ≤65 μm...
February 9, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28168649/combined-orcein-and-martius-scarlet-blue-omsb-staining-for-qualitative-and-quantitative-analyses-of-atherosclerotic-plaques-in-brachiocephalic-arteries-in-apoe-ldlr-mice
#9
Mariusz Gajda, Agnieszka Jasztal, Tomasz Banasik, Ewa Jasek-Gajda, Stefan Chlopicki
Numerous cellular and extracellular components should be analyzed in sections of atherosclerotic plaques to assess atherosclerosis progression and vulnerability. Here, we combined orcein (O) staining for elastic fibers and martius scarlet blue (MSB) polychrome to visualize various morphological contents of plaque in brachiocephalic arteries (BCA) of apoE/LDLR(-/-) mice. Elastic fibers (including broken elastic laminae and 'buried' fibrous caps) were stained purple and they could be easily distinguished from collagen fibers (blue)...
February 6, 2017: Histochemistry and Cell Biology
https://www.readbyqxmd.com/read/28164672/circulating-endothelial-progenitor-cells-were-increased-in-patients-with-thin-cap-fibroatheroma
#10
Qiang Tan, Qingsheng Wang, Shuangyue Zhang, Ximing Qi, Yang Li
BACKGROUND: We used virtual histology-intravascular ultrasound (VH-IVUS) to evaluate the relationship between circulating endothelial progenitor cells (EPC) and thin-cap fibroatheroma (TCFA). METHODS: This study included 52 patients with unstable angina who underwent coronary angiography and IVUS examination. Patients were divided into a TCFA group (n = 21) or a non-TCFA group (n = 31) based on VH-IVUS performance. Before angiography, peripheral blood levels of EPC were measured by flow cytometry...
November 1, 2016: Clinical Laboratory
https://www.readbyqxmd.com/read/28161258/pathology-of-chronic-total-occlusion-in-bare-metal-versus-drug-eluting-stents-implications-for-revascularization
#11
Hiroyoshi Mori, Christoph Lutter, Kazuyuki Yahagi, Emanuel Harari, Robert Kutys, David R Fowler, Elena Ladich, Michael Joner, Renu Virmani, Aloke V Finn
OBJECTIVES: The aim of this study was to explore the pathology of in-stent chronic total occlusion (IS-CTO) in bare-metal (BMS) versus drug-eluting stents (DES). BACKGROUND: Despite a relatively high prevalence of IS-CTO, little is known about the underlying etiology and histopathologic characteristics of the occlusion. METHODS: From CVPath Institute's stent registry of human native coronary arteries, the authors identified 56 lesions (32 BMS and 24 DES) from 54 patients with IS-CTO...
February 27, 2017: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28157944/simultaneous-imaging-of-atherosclerotic-plaque-composition-and-structure-with-dual-mode-photoacoustic-and-optical-coherence-tomography
#12
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/28093364/fabrication-of-nanofibrous-electrospun-scaffolds-from-a-heterogeneous-library-of-co-and-self-assembling-peptides
#13
Mahboubeh Maleki, Antonino Natalello, Raffaele Pugliese, Fabrizio Gelain
Self-assembling (SAPs) and co-assembling peptides (CAPs) are driving increasing enthusiasm as synthetic but biologically inspired biomaterials amenable of easy functionalization for regenerative medicine. On the other hand, electrospinning (ES) is a versatile technique useful for tailoring the nanostructures of various biomaterials into scaffolds resembling the extracellular matrices found in organs and tissues. The synergistic merging of these two approaches is a long-awaited advance in nanomedicine that has not been deeply documented so far...
January 16, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28077820/acute-coronary-syndrome-demonstrating-plaque-rupture-in-calcified-lesions-visualized-by-optical-frequency-domain-imaging
#14
Yutaka Goryo, Teruyoshi Kume, Yusuke Kobayashi, Hiroshi Okamoto, Ai Kawamura, Kenzo Fukuhara, Terumasa Koyama, Ryotaro Yamada, Koichiro Imai, Yoji Neishi, Shiro Uemura
A 68-year-old female with acute coronary syndrome was transferred to our hospital. Emergency coronary angiography showed 90% stenosis with severe calcification in the proximal right coronary artery (RCA). Intravascular ultrasound (IVUS) images were obtained and showed circumferential heavy calcification without any evidence of plaque rupture. Optical frequency domain imaging (OFDI) images were obtained in the RCA lesion 3 days after the initial coronary angiography. A cavity of plaque rupture in the calcified plaque by using OFDI was observed in the lesion, which could not be recognized by IVUS...
February 7, 2017: International Heart Journal
https://www.readbyqxmd.com/read/28071288/vulnerable-carotid-plaque-imaging-and-histopathology-without-a-dedicated-mri-receiver-coil
#15
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
https://www.readbyqxmd.com/read/28067670/mertk-receptor-cleavage-promotes-plaque-necrosis-and-defective-resolution-in-atherosclerosis
#16
Bishuang Cai, Edward B Thorp, Amanda C Doran, Brian E Sansbury, Mat J A P Daemen, Bernhard Dorweiler, Matthew Spite, Gabrielle Fredman, Ira Tabas
Atherothrombotic vascular disease is often triggered by a distinct type of atherosclerotic lesion that displays features of impaired inflammation resolution, notably a necrotic core and thinning of a protective fibrous cap that overlies the core. A key cause of plaque necrosis is defective clearance of apoptotic cells, or efferocytosis, by lesional macrophages, but the mechanisms underlying defective efferocytosis and its possible links to impaired resolution in atherosclerosis are incompletely understood. Here, we provide evidence that proteolytic cleavage of the macrophage efferocytosis receptor c-Mer tyrosine kinase (MerTK) reduces efferocytosis and promotes plaque necrosis and defective resolution...
February 1, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28059849/is-age-an-important-factor-for-vascular-response-to-statin-therapy-a-serial-optical-coherence-tomography-and-intravascular-ultrasound-study
#17
Jiannan Dai, Jingbo Hou, Lei Xing, Haibo Jia, Sining Hu, Tsunenari Soeda, Yoshiyasu Minami, Daniel Ong, Rocco Vergallo, Shaosong Zhang, Hang Lee, Bo Yu, Ik-Kyung Jang
OBJECTIVE: Age-related structural and functional changes in vessel wall may affect the time course of vascular response to statin therapy. In this study, we sought to compare the response of lipid-rich plaque to statin therapy in elderly versus younger patients using optical coherence tomography and intravascular ultrasound. PATIENTS AND METHODS: Sixty-nine patients who underwent serial optical coherence tomography and intravascular ultrasound at the time point of baseline, 6, and 12 months were divided into two groups according to median age: group A (age<57 years, n=35) and group B (age≥57 years, n=34)...
January 4, 2017: Coronary Artery Disease
https://www.readbyqxmd.com/read/28057387/principal-strain-vascular-elastography-simulation-and-preliminary-clinical-evaluation
#18
Rohit Nayak, Steven Huntzicker, Jacques Ohayon, Nancy Carson, Vikram Dogra, Giovanni Schifitto, Marvin M Doyley
It is difficult to produce reliable polar strain elastograms (radial and circumferential) because the center of the carotid artery is typically unknown. Principal strain imaging can overcome this limitation, but suboptimal lateral displacement estimates make this an impractical approach for visualizing mechanical properties within the carotid artery. We hypothesized that compounded plane wave imaging can minimize this problem. To test this hypothesis, we performed (i) simulations with vessels of varying morphology and mechanical behavior (i...
March 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28025424/morphological-features-of-coronary-plaques-in-whhlmi-rabbits-oryctolagus-cuniculus-an-animal-model-for-familial-hypercholesterolemia
#19
Satoshi Yamada, Tomonari Koike, Takayuki Nakagawa, Nobue Kuniyoshi, Yu Ying, Hiroyuki Itabe, Atsushi Yamashita, Yuji Asada, Masashi Shiomi
In order to examine their suitability for studies on coronary atherosclerosis, we evaluated the features of coronary atherosclerotic plaques in myocardial infarction-prone Watanabe heritable hyperlipidemic (WHHLMI) rabbits, a spontaneous animal model for coronary atherosclerosis and myocardial infarction. Coronary segments of the hearts of 187 WHHLMI rabbits (10-29 months old) were sectioned serially and stained histopathologically and immunohistologically. Progression of coronary lesions was prominent in rabbits that had died suddenly...
December 27, 2016: Experimental Animals
https://www.readbyqxmd.com/read/28012647/cd98-regulates-vascular-smooth-muscle-cell-proliferation-in-atherosclerosis
#20
Yvonne Baumer, Sara McCurdy, Martin Alcala, Nehal Mehta, Bog-Hieu Lee, Mark H Ginsberg, William A Boisvert
BACKGROUND AND AIMS: Vascular smooth muscle cells (VSMC) migrate and proliferate to form a stabilizing fibrous cap that encapsulates atherosclerotic plaques. CD98 is a transmembrane protein made of two subunits, CD98 heavy chain (CD98hc) and one of six light chains, and is known to be involved in cell proliferation and survival. Because the influence of CD98hc on atherosclerosis development is unknown, our aim was to determine if CD98hc expressed on VSMC plays a role in shaping the morphology of atherosclerotic plaques by regulating VSMC function...
January 2017: Atherosclerosis
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