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cardiovascular molecular imaging

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https://www.readbyqxmd.com/read/28332132/redefining-the-role-of-biomarkers-in-heart-failure-trials-expert-consensus-document
#1
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
#2
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...
March 20, 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
#3
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
#4
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
#5
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 (NIR) absorbing amphiphilic oligomer was 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...
March 15, 2017: ACS Nano
https://www.readbyqxmd.com/read/28290648/deep-venous-thrombosis-and-pulmonary-embolism-current-therapy
#6
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
#7
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
#8
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
#9
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
#10
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
#11
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
#12
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
https://www.readbyqxmd.com/read/28185191/a-coupled-approach-utilizing-immunohistochemistry-and-immunocytochemistry-to-visualize-cellular-lipophagy
#13
Aishwarya Sathyanarayan
Aberrant liver function as a consequence of excessive fat accumulation as observed in non-alcoholic fatty liver disease (NAFLD) is responsible for a plethora of disorders leading to the incidence of cardiovascular diseases. In most cases, the cause of NAFLD is not completely understood but has been primarily linked to the occurrence of insulin resistance that often accompanies obesity, dyslipidemia, and Type 2 Diabetes. Hence, it is of paramount importance to elucidate the molecular mechanisms of lipid metabolism underlying the pathogenesis of NAFLD and its comorbidities...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28165246/ultrasound-molecular-imaging-of-angiogenesis-using-vascular-endothelial-growth-factor-conjugated-microbubbles
#14
Jianjun Wang, Bin Qin, Xucai Chen, William R Wagner, Flordeliza S Villanueva
Imaging of angiogenesis receptors could provide a sensitive and clinically useful method for detecting neovascularization such as occurs in malignant tumors, and responses to antiangiogenic therapies for such tumors. We tested the hypothesis that microbubbles (MB) tagged with human VEGF121 (MBVEGF) bind to the kinase insert domain receptor (KDR) in vitro and angiogenic endothelium in vivo, and that this specific binding can be imaged on a clinical ultrasound system. In this work, targeted adhesion of MBVEGF was evaluated in vitro using a parallel plate flow system containing adsorbed recombinant human KDR...
February 15, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28156058/aging-and-caloric-restriction-impact-adipose-tissue-adiponectin-and-circulating-lipids
#15
Karl N Miller, Maggie S Burhans, Josef P Clark, Porsha R Howell, Michael A Polewski, Tyler M DeMuth, Kevin W Eliceiri, Mary J Lindstrom, James M Ntambi, Rozalyn M Anderson
Adipose tissue expansion has been associated with system-wide metabolic dysfunction and increased vulnerability to diabetes, cancer, and cardiovascular disease. A reduction in adiposity is a hallmark of caloric restriction (CR), an intervention that extends longevity and delays the onset of these same age-related conditions. Despite these parallels, the role of adipose tissue in coordinating the metabolism of aging is poorly defined. Here, we show that adipose tissue metabolism and secretory profiles change with age and are responsive to CR...
February 3, 2017: Aging Cell
https://www.readbyqxmd.com/read/28121134/molecular-imaging-of-vulnerable-atherosclerotic-plaques-in-vivo-with-osteopontin-specific-upconversion-nanoprobes
#16
Ruirui Qiao, Hongyu Qiao, Yan Zhang, Yabin Wang, Chongwei Chi, Jie Tian, Lifang Zhang, Feng Cao, Mingyuan Gao
Owing to the high mortality rate of cardiovascular diseases, developing novel noninvasive diagnostic methods becomes urgent and mandatory. It is well-known that the rupture of vulnerable plaques directly leads to deadly consequences. However, differentiating vulnerable plaques from stable plaques remains challenging in the clinic. In the current study, osteopontin (OPN), a secreted biomarker associated with macrophages and foamy macrophages, was selected as a target for identifying the vulnerable plaques. A dual modality imaging probe was constructed by covalently attaching an OPN antibody to NaGdF4:Yb,Er@NaGdF4 upconversion nanoparticles...
February 28, 2017: ACS Nano
https://www.readbyqxmd.com/read/28091604/polyglucose-nanoparticles-with-renal-elimination-and-macrophage-avidity-facilitate-pet-imaging-in-ischaemic-heart-disease
#17
Edmund J Keliher, Yu-Xiang Ye, Gregory R Wojtkiewicz, Aaron D Aguirre, Benoit Tricot, Max L Senders, Hannah Groenen, Francois Fay, Carlos Perez-Medina, Claudia Calcagno, Giuseppe Carlucci, Thomas Reiner, Yuan Sun, Gabriel Courties, Yoshiko Iwamoto, Hye-Yeong Kim, Cuihua Wang, John W Chen, Filip K Swirski, Hsiao-Ying Wey, Jacob Hooker, Zahi A Fayad, Willem J M Mulder, Ralph Weissleder, Matthias Nahrendorf
Tissue macrophage numbers vary during health versus disease. Abundant inflammatory macrophages destruct tissues, leading to atherosclerosis, myocardial infarction and heart failure. Emerging therapeutic options create interest in monitoring macrophages in patients. Here we describe positron emission tomography (PET) imaging with (18)F-Macroflor, a modified polyglucose nanoparticle with high avidity for macrophages. Due to its small size, Macroflor is excreted renally, a prerequisite for imaging with the isotope flourine-18...
January 16, 2017: Nature Communications
https://www.readbyqxmd.com/read/28078575/molecular-imaging-of-atherosclerosis-with-integrated-pet-imaging
#18
Basma Hammad, Nicholas R Evans, James H F Rudd, Ahmed Tawakol
Atherosclerotic diseases account for nearly half of all deaths and are leading causes of adult disability. Our understanding of how atherosclerosis leads to cardiovascular disease events has evolved: from a concept of progressive luminal narrowing, to that of sudden rupture and thrombosis of biologically active atheroma. In concert with this conceptual shift, contemporary imaging techniques now allow imaging of biological processes that associate with plaque instability: active calcification and plaque inflammation...
January 11, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28052015/epoxyeicosanoids-prevent-intervertebral-disc-degeneration-in-vitro-and-in-vivo
#19
Jing Li, Hanfeng Guan, Huiyong Liu, Libo Zhao, Li Li, Yong Zhang, Peng Tan, Baoguo Mi, Feng Li
Intervertebral disc (IVD) degeneration is considered a common cause of low back pain. In the degenerating IVD, the production of pro-inflammatory cytokines, including IL-1 and TNF-α, progressively increases, contributing to the degenerative process. Epoxyeicosatrienoic acids (EETs), synthesized from arachidonic acid by cytochrome P450 enzymes, act as autocrine and paracrine effectors in regulating inflammation, cardiovascular functions, and angiogenesis. EETs were shown to be especially potent promoters of tissue regeneration...
December 30, 2016: Oncotarget
https://www.readbyqxmd.com/read/28011379/heart-targeted-nanoliposomal-nanoparticles-drug-delivery-an-updated-review
#20
REVIEW
Mostafa Cheraghi, Babak Negahdari, Hadis Daraee, Ali Eatemadi
Nanoliposomes are type of nano-sized vesicles made of bi-layered phospholipid membranes with an aqueous interior. They have been demonstrated to deliver several materials like low molecular weight drugs, imaging agents, peptides, proteins, and nucleic acids. Nanoliposomes have been demonstrated to slowly release an encapsulated drug, thereby leading to sustained exposure to target region and improved efficacy. This ability of nano-liposomes can be harnessed to deliver therapeutic agents precisely to the infarcted heart...
February 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
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