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Molecular medical imaging

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https://www.readbyqxmd.com/read/28799517/imaging-biomarkers-of-anti-epileptic-drug-action-insights-from-magnetic-resonance-imaging
#1
Lorenzo Caciagli, Fenglai Xiao, Britta Wandschneider, Matthias J Koepp
BACKGROUND: Approximately one third of patients with epilepsy are refractory to medical treatment. Adverse effects associated with anti-epileptic drugs (AEDs) are considered to affect quality of life often more than seizures themselves. Neuroimaging techniques, particularly magnetic resonance imaging (MRI), have proven instrumental in clinical decision making in relation to epilepsy surgery, but may also provide further insights into the mechanisms underlying treatment response and side effects associated with AEDs...
August 9, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28783106/melanin-based-contrast-agents-for-biomedical-optoacoustic-imaging-and-theranostic-applications
#2
REVIEW
Dario Livio Longo, Rachele Stefania, Silvio Aime, Alexander Oraevsky
Optoacoustic imaging emerged in early 1990s as a new biomedical imaging technology that generates images by illuminating tissues with short laser pulses and detecting resulting ultrasound waves. This technique takes advantage of the spectroscopic approach to molecular imaging, and delivers high-resolution images in the depth of tissue. Resolution of the optoacoustic imaging is scalable, so that biomedical systems from cellular organelles to large organs can be visualized and, more importantly, characterized based on their optical absorption coefficient, which is proportional to the concentration of absorbing chromophores...
August 7, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28780044/from-interventionist-imaging-to-intraoperative-guidance-new-perspectives-by-combining-advanced-tools-and-navigation-with-radio-guided-surgery
#3
S Vidal-Sicart, R Valdés Olmos, O E Nieweg, R Faccini, M R Grootendorst, H J Wester, N Navab, B Vojnovic, H van der Poel, S Martínez-Román, J Klode, F Wawroschek, F W B van Leeuwen
The integration of medical imaging technologies into diagnostic and therapeutic approaches can provide a preoperative insight into both anatomical (e.g. using computed tomography (CT), magnetic resonance (MR) imaging, or ultrasound (US)), as well as functional aspects (e.g. using single photon emission computed tomography (SPECT), positron emission tomography (PET), lymphoscintigraphy, or optical imaging). Moreover, some imaging modalities are also used in an interventional setting (e.g. CT, US, gamma or optical imaging) where they provide the surgeon with real-time information during the procedure...
August 3, 2017: Revista Española de Medicina Nuclear e Imagen Molecular
https://www.readbyqxmd.com/read/28758836/contributions-for-classification-of-platelet-rich-plasma-proposal-of-a-new-classification-marspill
#4
Jose Fabio Santos Duarte Lana, Joseph Purita, Christian Paulus, Stephany Cares Huber, Bruno Lima Rodrigues, Ana Amélia Rodrigues, Maria Helena Santana, João Lopo Madureira, Ângela Cristina Malheiros Luzo, William Dias Belangero, Joyce Maria Annichino-Bizzacchi
Platelet-rich plasma (PRP) has emerged as a significant therapy used in medical conditions with heterogeneous results. There are some important classifications to try to standardize the PRP procedure. The aim of this report is to describe PRP contents studying celular and molecular components, and also propose a new classification for PRP. The main focus is on mononuclear cells, which comprise progenitor cells and monocytes. In addition, there are important variables related to PRP application incorporated in this study, which are the harvest method, activation, red blood cells, number of spins, image guidance, leukocytes number and light activation...
July 31, 2017: Regenerative Medicine
https://www.readbyqxmd.com/read/28755996/receptor-visualization-and-the-atomic-bomb-a-historical-account-of-the-development-of-the-chemical-neuroanatomy-of-receptors-for-neurotransmitters-and-drugs-during-the-cold-war
#5
REVIEW
J M Palacios, G Mengod
This is a historical account of how receptors for neurotransmitters and drugs got to be seen at the regional, cellular, and subcellular levels in brain, in the years going from the end of the World War II until the collapse of the Soviet Union, the Cold War (1945-1991). The realization in the US of the problem of mental health care, as a consequence of the results of medical evaluation for military service during the war, let the US Government to act creating among other things the National Institute for Mental Health (NIMH)...
July 26, 2017: Journal of Chemical Neuroanatomy
https://www.readbyqxmd.com/read/28754403/-clinical-and-pathological-features-of-gastrointestinal-stromal-tumors-gist-in-a-single-institution-a-descriptive-study-and-review-of-the-literature
#6
Diego Flores-Funes, Ramón José Lirón-Ruiz, Carmen Victoria Pérez-Guarinos, Juan Gervasio Martín-Lorenzo, José Antonio Torralba-Martínez, Alberto Giménez-Bascuñana, María Asunción Chaves-Benito, José Luis Aguayo-Albasini
AIMS: This study was aimed to assess the main clinical, pathological and therapeutic characteristics of a cohort of gastrointestinal stromal tumors (GIST). MATERIAL AND METHOD: Observational study including 66 patients diagnosed with GIST admitted to our hospital between 2002 and 2015. Parameters related to medical history, clinical manifestations, medical and surgical treatment, histopathology, and morbi-mortality were studied. A review of the literature was included to correlate with the results...
July 25, 2017: Cirugía Española
https://www.readbyqxmd.com/read/28752365/alternative-reagents-to-antibodies-in-imaging-applications
#7
REVIEW
R Bedford, C Tiede, R Hughes, A Curd, M J McPherson, Michelle Peckham, Darren C Tomlinson
Antibodies have been indispensable tools in molecular biology, biochemistry and medical research. However, a number of issues surrounding validation, specificity and batch variation of commercially available antibodies have prompted research groups to develop novel non-antibody binding reagents. The ability to select highly specific monoclonal non-antibody binding proteins without the need for animals, the ease of production and the ability to site-directly label has enabled a wide variety of applications to be tested, including imaging...
July 27, 2017: Biophysical Reviews
https://www.readbyqxmd.com/read/28739341/atomic-force-microscope-as-a-nano-and-micrometer-scale-biological-manipulator-a-short-review
#8
REVIEW
Atsushi Ikai, Rehana Afrin, Masakazu Saito, Takahiro Watanabe-Nakayama
The amazing capacity of atomic force microscope to let us touch the molecular and cellular level samples with a sharp probe stimulated its application to bio-medical field among others. In addition to topographical imaging of the sample surface, a direct mechanical manipulation has attracted innovative minds to develop new methodologies aiming at direct handling of proteins, DNA/RNA, and cells. Measurement of their mechanical properties brought about a vivid picture of their physical nature. Direct handling of individual molecules and cells prompted development of nano-medical applications...
July 21, 2017: Seminars in Cell & Developmental Biology
https://www.readbyqxmd.com/read/28736756/advancing-the-science-of-myocardial-recovery-with-mechanical-circulatory-support-a-working-group-of-the-national-heart-lung-and-blood-institute
#9
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...
June 2017: JACC. Basic to Translational Science
https://www.readbyqxmd.com/read/28734900/molecular-imaging-in-stem-cell-based-therapies-of-cardiac-diseases
#10
REVIEW
Xiang Li, Marcus Hacker
In the past 15years, despite regenerative medicine has shown great potential for cardiovascular diseases, the outcome and safety of stem cell transplantation has shown controversial results in the published literature. Medical imaging might be useful for monitoring and quantification transplanted cells within the heart and to serially characterize the effects of stem cell therapy of the myocardium. From the multiple available noninvasive imaging techniques, magnetic resonance imaging and nuclear imaging by positron (PET) or single photon emission computer tomography (SPECT) are the most used clinical approaches to follow the fate of transplanted stem cells in vivo...
July 19, 2017: Advanced Drug Delivery Reviews
https://www.readbyqxmd.com/read/28731408/defining-the-biological-basis-of-radiomic-phenotypes-in-lung-cancer
#11
Patrick Grossmann, Olya Stringfield, Nehme El-Hachem, Marilyn M Bui, Emmanuel Rios Velazquez, Chintan Parmar, Ralph Th Leijenaar, Benjamin Haibe-Kains, Philippe Lambin, Robert Gillies, Hugo Jwl Aerts
Medical imaging can visualize characteristics of human cancer noninvasively. Radiomics is an emerging field that translates these medical images into quantitative data to enable phenotypic profiling of tumors. While radiomics has been associated with several clinical endpoints, the complex relationships of radiomics, clinical factors, and tumor biology are largely unknown. To this end, we analyzed two independent cohorts of respectively 262 North American and 89 European patients with lung cancer, and consistently identified previously undescribed associations between radiomic imaging features, molecular pathways, and clinical factors...
July 21, 2017: ELife
https://www.readbyqxmd.com/read/28723416/unravelling-the-pharmacologic-opportunities-and-future-directions-for-targeted-therapies-in-gastro-intestinal-cancers-part-2-neuroendocrine-tumours-hepatocellular-carcinoma-and-gastro-intestinal-stromal-tumours
#12
REVIEW
Cindy Neuzillet, Louis de Mestier, Benoît Rousseau, Olivier Mir, Mohamed Hebbar, Hemant M Kocher, Philippe Ruszniewski, Christophe Tournigand
Until the 1990s, cytotoxic chemotherapy has been the cornerstone of medical therapy for gastrointestinal (GI) cancers. Better understanding of the cancer cell molecular biology has led to the therapeutic revolution of targeted therapies, i.e. monoclonal antibodies or small molecule inhibitors directed against proteins that are specifically overexpressed or mutated in cancer cells. These agents, being more specific to cancer cells, were expected to be less toxic than conventional cytotoxic agents. However, their effects have sometimes been disappointing, due to intrinsic or acquired resistance mechanisms, or to an activity restricted to some tumour settings, illustrating the importance of patient selection and early identification of predictive biomarkers of response to these therapies...
July 16, 2017: Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28723169/nanoantenna-enhanced-infrared-spectroscopic-chemical-imaging
#13
Lucca Kühner, Mario Hentschel, Ute Zschieschang, Hagen Klauk, Jochen Vogt, Christian Huck, Harald Giessen, Frank Neubrech
Spectroscopic infrared chemical imaging is ideally suited for label-free and spatially resolved characterization of molecular species, but often suffers from low infrared absorption cross sections. Here, we overcome this limitation by utilizing confined electromagnetic near-fields of resonantly excited plasmonic nanoantennas, which enhance the molecular absorption by orders of magnitude. In the experiments, we evaporate microstructured chemical patterns of C60 and pentacene with nanometer thickness on top of homogeneous arrays of tailored nanoantennas...
May 26, 2017: ACS Sensors
https://www.readbyqxmd.com/read/28713172/poxylation-as-an-alternative-stealth-coating-for-biomedical-applications
#14
Herdis Bludau, Anna E Czapar, Andrzej S Pitek, Sourabh Shukla, Rainer Jordan, Nicole F Steinmetz
Polyethylene glycol (PEG) polymers are currently used in a variety of medical formulations to reduce toxicity, minimize immune interactions and improve pharmacokinetics. Despite its widespread use however, the presence of anti-PEG antibodies indicates that this polymer has the potential to be immunogenic and antigenic. Here we present an alternative polymer, poly(2-oxazoline) (POx) for stealth applications, specifically shielding of a proteinaceous nanoparticle from recognition by the immune system. Tobacco mosaic virus (TMV) was used as our testbed due to its potential for use as a nanocarrier for drug delivery and molecular imaging applications...
March 2017: European Polymer Journal
https://www.readbyqxmd.com/read/28709114/isolated-pachymeningeal-metastasis-from-breast-cancer-clinical-features-and-prognostic-factors
#15
Mi Hwa Heo, Yoo Jin Cho, Hee Kyung Kim, Ji-Yeon Kim, Yeon Hee Park
PURPOSE: To evaluate the clinical features and prognoses of patients with isolated pachymeningeal metastasis (IPM) from breast cancer. METHODS: We reviewed the medical records of all patients with metastatic breast cancer (MBC) treated from January 2009 to August 2016. Eligibility criteria included diagnosis of pachymeningeal metastasis based on brain magnetic resonance imaging and histologic diagnosis of primary breast cancer. We excluded patients with concomitant parenchymal or leptomeningeal metastases...
July 11, 2017: Breast: Official Journal of the European Society of Mastology
https://www.readbyqxmd.com/read/28701281/editorial-for-the-special-issue-of-computational-methods-for-molecular-imaging-for-computerized-medical-imaging-and-graphics
#16
EDITORIAL
Kuangyu Shi, Fei Gao, Nassir Navab, Julia Schnabel, Pengcheng Shi, Sibylle I Ziegler
No abstract text is available yet for this article.
July 4, 2017: Computerized Medical Imaging and Graphics: the Official Journal of the Computerized Medical Imaging Society
https://www.readbyqxmd.com/read/28693198/pulmonary-toxicity-generated-from-radiotherapeutic-treatment-of-thoracic-malignancies
#17
Guodong Deng, Ning Liang, Jian Xie, Hui Luo, Lili Qiao, Jingxin Zhang, Dawei Wang, Jiandong Zhang
Radiation-induced lung injury (RILI) remains a major obstacle for thoracic radiotherapy for the treatment of lung cancer, esophageal cancer and lymphoma. It is the principal dose-limiting complication, and can markedly impair the therapeutic ratio as well as a patient's quality of life. The current review presents the relevant concepts associated with RILI, including the pathogenic mechanisms and the potential treatment strategies, so as to achieve a general understanding of this issue. RILI comprises an acute radiation pneumonitis phase and subsequent late lung fibrosis...
July 2017: Oncology Letters
https://www.readbyqxmd.com/read/28691070/molecular-local-and-network-level-basis-for-the-enhanced-stiffness-of-hydrogel-networks-formed-from-coassembled-racemic-peptides-predictions-from-pauling-and-corey
#18
Katelyn Nagy-Smith, Peter J Beltramo, Eric Moore, Robert Tycko, Eric M Furst, Joel P Schneider
Hydrogels prepared from self-assembling peptides are promising materials for medical applications, and using both l- and d-peptide isomers in a gel's formulation provides an intuitive way to control the proteolytic degradation of an implanted material. In the course of developing gels for delivery applications, we discovered that a racemic mixture of the mirror-image β-hairpin peptides, named MAX1 and DMAX1, provides a fibrillar hydrogel that is four times more rigid than gels formed by either peptide alone-a puzzling observation...
June 28, 2017: ACS Central Science
https://www.readbyqxmd.com/read/28690357/federating-heterogeneous-datasets-to-enhance-data-sharing-and-experiment-reproducibility
#19
Juan C Prieto, Beatriz Paniagua, Marilia S Yatabe, Antonio C O Ruellas, Liana Fattori, Luciana Muniz, Martin Styner, Lucia Cevidanes
Recent studies have demonstrated the difficulties to replicate scientific findings and/or experiments published in past.(1) The effects seen in the replicated experiments were smaller than previously reported. Some of the explanations for these findings include the complexity of the experimental design and the pressure on researches to report positive findings. The International Committee of Medical Journal Editors (ICMJE) suggests that every study considered for publication must submit a plan to share the de-identified patient data no later than 6 months after publication...
February 11, 2017: Proceedings of SPIE
https://www.readbyqxmd.com/read/28686121/surgical-and-molecular-considerations-in-the-treatment-of-pediatric-thalamopeduncular-tumors
#20
Ryan P Lee, Kimberly A Foster, Jock C Lillard, Paul Klimo, David W Ellison, Brent Orr, Frederick A Boop
OBJECTIVE Thalamopeduncular tumors are a group of pediatric low-grade gliomas that arise at the interface of the thalamus and brainstem peduncle. They typically occur within the first 2 decades of life, presenting with progressive spastic hemiparesis. Treatment strategies, including surgical intervention, have varied significantly. The authors present their experience in the treatment of 13 children, ages 2-15 years, with non-neurofibromatosis-related pilocytic astrocytomas located in the thalamopeduncular region...
July 7, 2017: Journal of Neurosurgery. Pediatrics
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