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cardiovascular molecular imaging

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https://www.readbyqxmd.com/read/28433665/advancing-the-science-of-myocardial-recovery-with-mechanical-circulatory-support-a-working-group-of-the-national-heart-lung-and-blood-institute
#1
Stavros G Drakos, Francis D Pagani, Martha S Lundberg, J Timothy Baldwin
The medical burden of heart failure (HF) has spurred interest in clinicians and scientists to develop therapies to restore the function of a failing heart. To advance this agenda, the National Heart Lung Blood Institute (NHLBI) convened a Working Group of experts on June 2-3, 2016 in Bethesda Maryland to develop recommendations for the NHLBI aimed at advancing the science of cardiac recovery in the setting of mechanical circulatory support (MCS). MSC devices effectively reduce volume and pressure overload that drives the cycle of progressive myocardial dysfunction, thereby triggering structural and functional reverse remodeling...
April 19, 2017: Journal of Cardiac Failure
https://www.readbyqxmd.com/read/28413580/pet-imaging-and-its-application-in-cardiovascular-diseases
#2
Zheng Li, Anisha A Gupte, Anjun Zhang, Dale J Hamilton
Cardiovascular diseases (CVDs) are the leading cause of death worldwide and represent a great challenge for modern research and medicine. Despite advances in preventing and treating CVD over the decades, there remains an urgent need to develop sensitive and safe methods for early detection and personalized treatment. With refinements of molecular imaging technologies such as positron emission tomography (PET), noninvasive imaging of CVDs is experiencing impressive progress in both preclinical and clinical settings...
January 2017: Methodist DeBakey Cardiovascular Journal
https://www.readbyqxmd.com/read/28404198/molecular-fluorescence-guided-surgery-of-peritoneal-carcinomatosis-of-colorectal-origin-a-single-centre-feasibility-study
#3
Niels J Harlaar, Marjory Koller, Steven J de Jongh, Barbara L van Leeuwen, Patrick H Hemmer, Schelto Kruijff, Robert J van Ginkel, Lukas B Been, Johannes S de Jong, Gursah Kats-Ugurlu, Matthijs D Linssen, Annelies Jorritsma-Smit, Marleen van Oosten, Wouter B Nagengast, Vasilis Ntziachristos, Gooitzen M van Dam
BACKGROUND: Optimum cytoreductive surgery combined with hyperthermic intraperitoneal chemotherapy (HIPEC) is essential for the curative treatment of peritoneal carcinomatosis of colorectal origin. At present, surgeons depend on visual inspection and palpation for tumour detection. Improved detection of tumour tissue using molecular fluorescence-guided surgery could not only help attain a complete cytoreduction of metastatic lesions, but might also prevent overtreatment by avoiding resection of benign lesions...
December 2016: Lancet. Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28398124/from-molecular-mechanisms-to-clinical-management-of-antineoplastic-drug-induced-cardiovascular-toxicity-a-translational-overview
#4
Carlo Gabriele Tocchetti, Christian Cadeddu, Daniela Di Lisi, Saveria Femminò, Rosalinda Madonna, Donato Mele, Ines Monte, Giuseppina Novo, Claudia Penna, Alessia Pepe, Paolo Spallarossa, Gilda Varricchi, Concetta Zito, Pasquale Pagliaro, Giuseppe Mercuro
SIGNIFICANCE: Antineoplastic therapies have improved the prognosis of oncology patients sig-nificantly. However, these treatments can bring to a higher incidence of side effects, including the worrying cardiovascular toxicity (CTX). Recent Advances: Substantial evidence indicates multiple mechanisms of CTX, with redox mechanisms playing a key role. Recent data singled out mitochondria as key targets for antineoplastic drug-induced CTX; understanding the underlying mechanisms is therefore cru-cial for effective cardioprotection, without compromising the efficacy of anti-cancer treat-ments...
April 11, 2017: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/28382019/transcriptome-analysis-showed-a-differential-signature-between-invasive-and-non-invasive-corticotrophinomas
#5
Leonardo Jose Tadeu de Araújo, Antonio Marcondes Lerario, Margaret de Castro, Clarissa Silva Martins, Marcello Delano Bronstein, Marcio Carlos Machado, Ericka Barbosa Trarbach, Maria Candida Barisson Villares Fragoso
ACTH-dependent hypercortisolism caused by a pituitary adenoma [Cushing's disease (CD)] is the most common cause of endogenous Cushing's syndrome. CD is often associated with several morbidities, including hypertension, diabetes, osteoporosis/bone fractures, secondary infections, and increased cardiovascular mortality. While the majority (≈80%) of the corticotrophinomas visible on pituitary magnetic resonance imaging are microadenomas (MICs, <10 mm of diameter), some tumors are macroadenomas (MACs, ≥10 mm) with increased growth potential and invasiveness, exceptionally exhibiting malignant demeanor...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28362405/local-field-fluorescence-microscopy-imaging-cellular-signals-in-intact-hearts
#6
Yuriana Aguilar-Sanchez, Diego Fainstein, Rafael Mejia-Alvarez, Ariel L Escobar
In the heart, molecular signaling studies are usually performed in isolated myocytes. However, many pathological situations such as ischemia and arrhythmias can only be fully understood at the whole organ level. Here, we present the spectroscopic technique of local field fluorescence microscopy (LFFM) that allows the measurement of cellular signals in the intact heart. The technique is based on a combination of a Langendorff perfused heart and optical fibers to record fluorescent signals. LFFM has various applications in the field of cardiovascular physiology to study the heart under normal and pathological conditions...
March 8, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28351964/left-ventricular-remodeling-leads-to-heart-failure-in-mice-with-cardiac-specific-overexpression-of-vegf-b167-echocardiography-and-magnetic-resonance-imaging-study
#7
Line Lottonen-Raikaslehto, Riina Rissanen, Erika Gurzeler, Mari Merentie, Jenni Huusko, Jurgen E Schneider, Timo Liimatainen, Seppo Ylä-Herttuala
Cardiac-specific overexpression of vascular endothelial growth factor (VEGF)-B167 is known to induce left ventricular hypertrophy due to altered lipid metabolism, in which ceramides accumulate to the heart and cause mitochondrial damage. The aim of this study was to evaluate and compare different imaging methods to find the most sensitive way to diagnose at early stage the progressive left ventricular remodeling leading to heart failure. Echocardiography and cardiovascular magnetic resonance imaging were compared for imaging the hearts of transgenic mice with cardiac-specific overexpression of VEGF-B167 and wild-type mice from 5 to 14 months of age at several time points...
March 2017: Physiological Reports
https://www.readbyqxmd.com/read/28349887/atherosclerotic-plaque-metabolism-in-high-cardiovascular-risk-subjects-a-subclinical-atherosclerosis-imaging-study-with-18-f-naf-pet-ct
#8
Manuel de Oliveira-Santos, Miguel Castelo-Branco, Rodolfo Silva, Andreia Gomes, Nuno Chichorro, Antero Abrunhosa, Paulo Donato, João Pedroso de Lima, Mariano Pego, Lino Gonçalves, Maria João Ferreira
BACKGROUND AND AIMS: Atherosclerotic plaque molecular imaging with (18)F-sodium fluoride (NaF) in positron emission tomography with computed tomography (PET-CT) provides potential discrimination between active unstable microcalcification and established dormant calcification. We aimed to study (18)F-NaF atherosclerotic plaque uptake in high cardiovascular (CV) risk participants and its associations with CV risk factors, coronary calcium score and thoracic fat volume. METHODS: High CV risk hypertensive individuals from a single centre were prospectively scanned with (18)F-NaF-PET-CT in the coronary, aortic and carotideal arteries...
May 2017: Atherosclerosis
https://www.readbyqxmd.com/read/28332132/redefining-the-role-of-biomarkers-in-heart-failure-trials-expert-consensus-document
#9
REVIEW
Frank Kramer, Hani N Sabbah, James J Januzzi, Faiez Zannad, J Peter van Tintelen, Erik B Schelbert, Raymond J Kim, Hendrik Milting, Richardus Vonk, Brien Neudeck, Richard Clark, Klaus Witte, Wilfried Dinh, Burkert Pieske, Javed Butler, Mihai Gheorghiade
Heart failure is a growing cardiovascular disease with significant epidemiological, clinical, and societal implications and represents a high unmet need. Strong efforts are currently underway by academic and industrial researchers to develop novel treatments for heart failure. Biomarkers play an important role in patient selection and monitoring in drug trials and in clinical management. The present review gives an overview of the role of available molecular, imaging, and device-derived digital biomarkers in heart failure drug development and highlights capabilities and limitations of biomarker use in this context...
March 23, 2017: Heart Failure Reviews
https://www.readbyqxmd.com/read/28319050/extracellular-matrix-proteomics-identifies-molecular-signature-of-symptomatic-carotid-plaques
#10
Sarah R Langley, Karin Willeit, Athanasios Didangelos, Ljubica Perisic Matic, Philipp Skroblin, Javier Barallobre-Barreiro, Mariette Lengquist, Gregor Rungger, Alexander Kapustin, Ludmilla Kedenko, Chris Molenaar, Ruifang Lu, Temo Barwari, Gonca Suna, Xiaoke Yin, Bernhard Iglseder, Bernhard Paulweber, Peter Willeit, Joseph Shalhoub, Gerard Pasterkamp, Alun H Davies, Claudia Monaco, Ulf Hedin, Catherine M Shanahan, Johann Willeit, Stefan Kiechl, Manuel Mayr
BACKGROUND: The identification of patients with high-risk atherosclerotic plaques prior to the manifestation of clinical events remains challenging. Recent findings question histology- and imaging-based definitions of the "vulnerable plaque," necessitating an improved approach for predicting onset of symptoms. METHODS: We performed a proteomics comparison of the vascular extracellular matrix and associated molecules in human carotid endarterectomy specimens from 6 symptomatic versus 6 asymptomatic patients to identify a protein signature for high-risk atherosclerotic plaques...
April 3, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28317279/the-role-of-advanced-echocardiography-and-cardiovascular-magnetic-resonance-in-the-assessment-of-myocardial-function-in-marfan-syndrome-an-update
#11
REVIEW
Anatoli Kiotsekoglou, James C Moggridge, Anne H Child, Peter Rask
Cardiovascular assessment of patients with Marfan syndrome has normally focused on the aortic root and vascular manifestations of the disease due to the high risk of aortic dissection. Although primary myocardial impairment has long been suspected in these patients, the evidence has been controversial. Advanced echocardiography and cardiovascular magnetic resonance imaging have proven to be effective, accurate, and more sensitive in the detection of subtle cardiac dysfunction. The application of these techniques to Marfan syndrome over the last 10 years has made significant progress in demonstrating the presence of primary myocardial impairment in these patients, but further work is still required to obtain confirmatory molecular, pathophysiological, and prognostic clinical data...
March 19, 2017: Echocardiography
https://www.readbyqxmd.com/read/28302035/translational-multimodality-neuroimaging
#12
Sushil K Sharma
Recently high-resolution, noninvasive, multimodality in-vivo molecular imaging with PET, SPECT, CT and MRI, employing fusion algorithms has revolutionized personalized medicine. However, specific radiopharmaceuticals (RPs) for the accurate diagnosis and effective treatment of progressive neurodegenerative diseases such as Alzheimer's disease, Parkinson's disease, drug addiction, and other cognitive impairments still remain in developmental phase. Currently, multimodality fusion neuroimaging is utilized for the determination of: pharmacokinetics and pre-clinical development of radiopharmaceuticals (RPs); in-vivo monitoring of stem cell transplantation therapy; nicotinic acetylcholine receptors (nAChRs) investigations; and regional cerebral blood flow and glucose metabolism in cognitively-impaired subjects employing noninvasive microPET and nano-SPECT imaging...
March 15, 2017: Current Drug Targets
https://www.readbyqxmd.com/read/28296388/degradable-semiconducting-oligomer-amphiphile-for-ratiometric-photoacoustic-imaging-of-hypochlorite
#13
Chao Yin, Xu Zhen, Quli Fan, Wei Huang, Kanyi Pu
Upregulation of highly reactive oxygen species (ROS) such as hypochlorite (ClO(-)) is associated with many pathological conditions including cardiovascular diseases, neuron degeneration, lung injury, and cancer. However, real-time imaging of ClO(-) is limited to the probes generally relying on fluorescence with shallow tissue-penetration depth. We here propose a self-assembly approach to develop activatable and degradable photoacoustic (PA) nanoprobes for in vivo imaging of ClO(-). A near-infrared absorbing amphiphilic oligomer is synthesized to undergo degradation in the presence of a specific ROS (ClO(-)), which integrates a π-conjugated but ClO(-) oxidizable backbone with hydrophilic PEG side chains...
April 25, 2017: ACS Nano
https://www.readbyqxmd.com/read/28290648/deep-venous-thrombosis-and-pulmonary-embolism-current-therapy
#14
Jason Wilbur, Brian Shian
Pulmonary embolism and deep venous thrombosis are the two most important manifestations of venous thromboembolism (VTE), which is the third most common life-threatening cardiovascular disease in the United States. Anticoagulation is the mainstay of VTE treatment. Most patients with deep venous thrombosis or low-risk pulmonary embolism can be treated in the outpatient setting with low-molecular-weight heparin and a vitamin K antagonist (warfarin) or direct-acting oral anticoagulants. Inpatient treatment of VTE begins with parenteral agents, preferably low-molecular-weight heparin...
March 1, 2017: American Family Physician
https://www.readbyqxmd.com/read/28279225/allogenic-adipose-derived-stem-cell-therapy-overcomes-ischemia-induced-microvessel-rarefaction-in-the-myocardium-systems-biology-study
#15
Gemma Vilahur, Blanca Oñate, Judit Cubedo, Maria Teresa Béjar, Gemma Arderiu, Esther Peña, Laura Casaní, Manuel Gutiérrez, Antoni Capdevila, Guillem Pons-Lladó, Francesc Carreras, Alberto Hidalgo, Lina Badimon
BACKGROUND: Myocardial microvascular loss after myocardial infarction (MI) remains a therapeutic challenge. Autologous stem cell therapy was considered as an alternative; however, it has shown modest benefits due to the impairing effects of cardiovascular risk factors on stem cells. Allogenic adipose-derived stem cells (ASCs) may overcome such limitations, and because of their low immunogenicity and paracrine potential may be good candidates for cell therapy. In the present study we investigated the effects of allogenic ASCs and their released products on cardiac rarefaction post MI...
March 9, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/28248931/systematic-high-content-genome-wide-rnai-screens-of-endothelial-cell-migration-and-morphology
#16
Steven P Williams, Cathryn M Gould, Cameron J Nowell, Tara Karnezis, Marc G Achen, Kaylene J Simpson, Steven A Stacker
Many cell types undergo migration during embryogenesis and disease. Endothelial cells line blood vessels and lymphatics, which migrate during development as part of angiogenesis, lymphangiogenesis and other types of vessel remodelling. These processes are also important in wound healing, cancer metastasis and cardiovascular conditions. However, the molecular control of endothelial cell migration is poorly understood. Here, we present a dataset containing siRNA screens that identify known and novel components of signalling pathways regulating migration of lymphatic endothelial cells...
March 1, 2017: Scientific Data
https://www.readbyqxmd.com/read/28229420/noninvasive-assessment-of-cell-fate-and-biology-in-transplanted-mesenchymal-stem-cells
#17
Federico Franchi, Martin Rodriguez-Porcel
Recently, molecular imaging has become a conditio sine qua non for cell-based regenerative medicine. Developments in molecular imaging techniques, such as reporter gene technology, have increasingly enabled the noninvasive assessment of the fate and biology of cells after cardiovascular applications. In this context, bioluminescence imaging is the most commonly used imaging modality in small animal models of preclinical studies. Here, we present a detailed protocol of a reporter gene imaging approach for monitoring the viability and biology of Mesenchymal Stem Cells transplanted in a mouse model of myocardial ischemia reperfusion injury...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28215516/aisf-position-paper-on-nonalcoholic-fatty-liver-disease-nafld-updates-and-future-directions
#18
Amedeo Lonardo, Fabio Nascimbeni, Giovanni Targher, Mauro Bernardi, Ferruccio Bonino, Elisabetta Bugianesi, Alessandro Casini, Amalia Gastaldelli, Giulio Marchesini, Fabio Marra, Luca Miele, Filomena Morisco, Salvatore Petta, Fabio Piscaglia, Gianluca Svegliati-Baroni, Luca Valenti, Stefano Bellentani
This review summarizes our current understanding of nonalcoholic fatty liver disease (NAFLD), a multi-factorial systemic disease resulting from a complex interaction between a specific genetic background and multiple environmental/metabolic "hits". The role of gut microbiota, lipotoxicity, inflammation and their molecular pathways is reviewed in-depth. We also discuss the epidemiology and natural history of NAFLD by pinpointing the remarkably high prevalence of NAFLD worldwide and its inherent systemic complications: hepatic (steatohepatitis, advanced fibrosis and cirrhosis), cardio-metabolic (cardiovascular disease, cardiomyopathy, arrhythmias and type 2 diabetes) and neoplastic (primary liver cancers and extra-hepatic cancers)...
January 23, 2017: Digestive and Liver Disease
https://www.readbyqxmd.com/read/28207191/cysteine-proteases-in-atherosclerosis
#19
REVIEW
Tommy Weiss Sadan, Israel Gotsman, Galia Blum
Atherosclerosis predisposes patients to cardiovascular diseases, such as myocardial infarction and stroke. Instigation of vascular injury is triggered by retention of lipids and inflammatory cells in the vascular endothelium. Whereas these vascular lesions develop in young adults and are mostly considered harmless, over time persistent inflammatory and remodeling processes will ultimately damage the arterial wall and cause a thrombotic event due to exposure of tissue factors into the lumen. Evidence from human tissues and pre-clinical animal models have clearly established the role of cathepsin cysteine proteases in the development and progression of vascular lesions...
February 16, 2017: FEBS Journal
https://www.readbyqxmd.com/read/28194727/review-of-cardiovascular-imaging-in-the-journal-of-nuclear-cardiology-in-2016-part-1-of-2-positron-emission-tomography-computed-tomography-and-magnetic-resonance
#20
Wael AlJaroudi, Fadi G Hage
Several original articles and editorials have been published in the Journal of Nuclear Cardiology last year. It has become a tradition at the beginning of each year to summarize some of these key articles (AlJaroudi and Hage in J Nucl Cardiol 22:507-512, 2015, 23:122-130, 2016; Hage and AlJaroudi in J Nucl Cardiol 22:714-719, 2015; 23:493-498, 2016). In this part one, we will discuss some of the progress made in patients with infiltrative disease, cardiomyopathies (non-ischemic, ischemic, and diabetic), hybrid and molecular imaging, using advancement in positron emission tomography, computed tomography, and magnetic resonance imaging...
February 13, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
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