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https://www.readbyqxmd.com/read/29350435/from-micro-to-macro-structures-in-multiple-sclerosis-what-is-the-added-value-of-diffusion-imaging
#1
Mara Cercignani, Claudia Gandini Wheeler-Kingshott
Diffusion imaging has been instrumental in understanding damage to the central nervous system as a result of its sensitivity to microstructural changes. Clinical applications of diffusion imaging have grown exponentially over the past couple of decades in many neurological and neurodegenerative diseases, such as multiple sclerosis (MS). For several reasons, MS has been extensively researched using advanced neuroimaging techniques, which makes it an 'example disease' to illustrate the potential of diffusion imaging for clinical applications...
January 19, 2018: NMR in Biomedicine
https://www.readbyqxmd.com/read/29349488/one-step-synthesis-of-an-18f-labeled-boron-derived-methionine-analog-a-substitute-for-11c-methionine
#2
EDITORIAL
Zhen Liu, Emily B Ehlerding, Weibo Cai, Xiaoli Lan
Amino acid-based tracers have been extensively investigated for positron emission tomography (PET) imaging of brain tumors, and 11C-methionine (11C-MET) is one of the most extensively investigated. However, widespread clinical use of 11C-MET is challenging due to the short half-life of 11C and low radiolabeling yield. In this issue of the European Journal of Nuclear Medicine and Molecular Imaging, Yang and colleagues report an 18F-labeled boron-derived methionine analog, 18F-B-MET, as a potential substitute for 11C-MET in PET imaging of glioma...
January 18, 2018: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/29346949/hyperuniformity-disorder-length-spectroscopy-for-extended-particles
#3
D J Durian
The concept of a hyperuniformity disorder length h was recently introduced for analyzing volume fraction fluctuations for a set of measuring windows [Chieco et al., Phys. Rev. E 96, 032909 (2017).PLEEE81539-375510.1103/PhysRevE.96.032909]. This length permits a direct connection to the nature of disorder in the spatial configuration of the particles and provides a way to diagnose the degree of hyperuniformity in terms of the scaling of h and its value in comparison with established bounds. Here, this approach is generalized for extended particles, which are larger than the image resolution and can lie partially inside and partially outside the measuring windows...
September 2017: Physical Review. E
https://www.readbyqxmd.com/read/29346507/activity-and-safety-of-afatinib-in-a-window-pre-operative-eortc-study-in-patients-with-squamous-cell-carcinoma-of-the-head-and-neck-scchn
#4
J P Machiels, P Bossi, J Menis, M Lia, C Fortpied, Y Liu, R Lhommel, M Lemort, S Schmitz, S Canevari, L De Cecco, M Guzzo, R Bianchi, P Quattrone, F Crippa, T Duprez, Y Lalami, M Quiriny, N de Saint Aubain, P M Clement, R Coropciuc, E Hauben, L F Licitra
Background: To investigate the activity and safety of afatinib in the pre-operative treatment of squamous cell carcinoma of the head and neck (SCCHN). Patients and methods: This study was an open-label, randomized, multicenter, phase II window of opportunity trial. Treatment-naïve SCCHN patients selected for primary curative surgery were randomized (5:1 ratio) to receive afatinib during 14 days (day -15 until day -1) before surgery (day 0) or no treatment. Tumor biopsies, 2-[fluorine-18]-fluoro-2-deoxy-D-glucose positron emission tomography (FDG-PET), and magnetic resonance imaging (MRI) were performed at diagnosis and just before surgery...
January 15, 2018: Annals of Oncology: Official Journal of the European Society for Medical Oncology
https://www.readbyqxmd.com/read/29345990/imaging-mrna-in-vivo-from-birth-to-death
#5
Evelina Tutucci, Nathan M Livingston, Robert H Singer, Bin Wu
RNA is the fundamental information transfer system in the cell. The ability to follow single messenger RNAs (mRNAs) from transcription to degradation with fluorescent probes gives quantitative information about how the information is transferred fromDNAto proteins. This review focuses on the latest technological developments in the field of single-mRNA detection and their usage to study gene expression in both fixed and live cells. By describing the application of these imaging tools, we follow the journey of mRNA from transcription to decay in single cells, with single-molecule resolution...
January 18, 2018: Annual Review of Biophysics
https://www.readbyqxmd.com/read/29344827/molecular-imaging-of-cardiac-remodelling-after-myocardial-infarction
#6
REVIEW
Daniel Curley, Begoña Lavin Plaza, Ajay M Shah, René M Botnar
Myocardial infarction and subsequent heart failure is a major health burden associated with significant mortality and morbidity in western societies. The ability of cardiac tissue to recover after myocardial infarction is affected by numerous complex cellular and molecular pathways. Unbalance or failure of these pathways can lead to adverse remodelling of the heart and poor prognosis. Current clinical cardiac imaging modalities assess anatomy, perfusion, function, and viability of the myocardium, yet do not offer any insight into the specific molecular pathways involved in the repair process...
January 17, 2018: Basic Research in Cardiology
https://www.readbyqxmd.com/read/29344308/-albumin-hitchhiking-with-an-evans-blue-analog-for-cancer-theranostics
#7
EDITORIAL
Emily B Ehlerding, Xiaoli Lan, Weibo Cai
Although 177Lu-DOTA-TATE was recently approved in Europe for the treatment of certain neuroendocrine tumors, continued development and optimization has been ongoing to further improve the therapeutic efficacy of somatostatin receptor 2 targeted peptide receptor radionuclide therapy, as well as reducing the renal toxicity. In this work, the use of an Evans blue analog for "albumin hitchhiking" resulted in significant improvement in both the imaging performance and therapeutic efficacy of radiolabeled octreotate, as well as reducing the toxicity since much less radioactivity was used for therapy...
2018: Theranostics
https://www.readbyqxmd.com/read/29344305/a-tumor-activatable-theranostic-nanomedicine-platform-for-nir-fluorescence-guided-surgery-and-combinatorial-phototherapy
#8
Xiaoning Li, Canan Schumann, Hassan A Albarqi, Christopher J Lee, Adam W G Alani, Shay Bracha, Milan Milovancev, Olena Taratula, Oleh Taratula
Fluorescence image-guided surgery combined with intraoperative therapeutic modalities has great potential for intraoperative detection of oncologic targets and eradication of unresectable cancer residues. Therefore, we have developed an activatable theranostic nanoplatform that can be used concurrently for two purposes: (1) tumor delineation with real-time near infrared (NIR) fluorescence signal during surgery, and (2) intraoperative targeted treatment to further eliminate unresected disease sites by non-toxic phototherapy...
2018: Theranostics
https://www.readbyqxmd.com/read/29344009/evaluation-of-nipple-aspirate-fluid-as-a-diagnostic-tool-for-early-detection-of-breast-cancer
#9
REVIEW
Sadr-Ul Shaheed, Catherine Tait, Kyriacos Kyriacou, Richard Linforth, Mohamed Salhab, Chris Sutton
There has been tremendous progress in detection of breast cancer in postmenopausal women, resulting in two-thirds of women surviving more than 20 years after treatment. However, breast cancer remains the leading cause of cancer-related deaths in premenopausal women. Breast cancer is increasing in younger women due to changes in life-style as well as those at high risk as carriers of mutations in high-penetrance genes. Premenopausal women with breast cancer are more likely to be diagnosed with aggressive tumours and therefore have a lower survival rate...
2018: Clinical Proteomics
https://www.readbyqxmd.com/read/29343189/translating-ancient-alchemy-fragments-of-graeco-egyptian-alchemy-in-arabic-compendia
#10
Matteo Martelli
Translation played a vital role in the development and transfer of alchemy in Antiquity and the Early Middle Ages. Since its origins in Graeco-Roman Egypt, alchemy was encapsulated in Greek texts which allegedly relied on Persian or Egyptian sources. Later, a variety of Greek and Byzantine writings were translated into Syriac and Arabic, and these translations were in turn fragmented and disseminated in later Arabic compendia. This paper will first review the main phases of this historical process of transmission of alchemy from one language and culture to another...
January 17, 2018: Ambix
https://www.readbyqxmd.com/read/29341222/89-zr-immunopet-companion-diagnostics-and-their-impact-in-clinical-drug-development
#11
REVIEW
Brooke N McKnight, Nerissa T Viola-Villegas
Therapeutic monoclonal antibodies (mAbs) have been used in cancer treatment for 30 years, with around 24 mAb and mAb:drug conjugates approved by the FDA to date. Despite their specificity, efficacy has remained limited, which, in part, derails nascent initiatives towards precision medicine. An image-guided approach to reinforce treatment decisions using immune positron emission tomography (immunoPET) companion diagnostic is warranted. This review provides a general overview of current translational research using Zr-89 immunoPET and opportunities for utilizing and harnessing this tool to its full potential...
January 17, 2018: Journal of Labelled Compounds & Radiopharmaceuticals
https://www.readbyqxmd.com/read/29341013/rodent-abdominal-adipose-tissue-imaging-by-mr
#12
Bhanu Prakash Kn, Jadegoud Yaligar, Sanjay K Verma, Venkatesh Gopalan, S Sendhil Velan
Rodents including rats and mice are important models to study obesity, diabetes, and metabolic syndrome in a preclinical setting. Translational and longitudinal imaging of these rodents permit investigation of metabolic diseases and identification of imaging biomarkers suitable for clinical translation. Here we describe the imaging protocols for achieving quantitative abdominal imaging in small animals followed by segmentation and quantification of fat volumes.
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29341006/mapping-functional-connectivity-in-the-rodent-brain-using-electric-stimulation-fmri
#13
Laura Pérez-Cervera, José María Caramés, Luis Miguel Fernández-Mollá, Andrea Moreno, Begoña Fernández, Elena Pérez-Montoyo, David Moratal, Santiago Canals, Jesús Pacheco-Torres
Since its discovery in the early 90s, BOLD signal-based functional Magnetic Resonance Imaging (fMRI) has become a fundamental technique for the study of brain activity in basic and clinical research. Functional MRI signals provide an indirect but robust and quantitative readout of brain activity through the tight coupling between cerebral blood flow and neuronal activation, the so-called neurovascular coupling. Combined with experimental techniques only available in animal models, such as intracerebral micro-stimulation, optogenetics or pharmacogenetics, provides a powerful framework to investigate the impact of specific circuit manipulations on overall brain dynamics...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29341005/diffusion-tensor-imaging-dti
#14
Silvia Lope-Piedrafita
Diffusion Tensor Imaging is an MRI technique that allows in vivo noninvasive measurement of the translational motion of water, providing information about its anisotropy (or lack of it) in different tissues. DTI has been commonly used to quantitatively measure the integrity of tissues which may be compromised by neurological disease, such as white matter tracks of the brain, which normally impart significant anisotropy to water motion in healthy brains. However, this anisotropic effect is diminished when axonal or neuronal damage is present...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29340386/on-chip-functional-neuroimaging-with-mechanical-stimulation-in-caenorhabditis-elegans-larvae-for-studying-development-and-neural-circuits
#15
Yongmin Cho, David N Oakland, Sol Ah Lee, William R Schafer, Hang Lu
Mechanosensation is fundamentally important for the abilities of an organism to experience touch, hear sounds, and maintain balance. Caenorhabditis elegans is a powerful system for studying mechanosensation as this worm is well suited for in vivo functional imaging of neurons. Many years of research using labor-intensive methods have generated a wealth of knowledge about mechanosensation in C. elegans, and the recent microfluidic-based platforms continue to push the boundary for this field. However, developmental aspects of sensory biology, including mechanosensation, are still not fully understood...
January 17, 2018: Lab on a Chip
https://www.readbyqxmd.com/read/29339550/relative-target-affinities-of-t-cell-dependent-bispecific-antibodies-determine-biodistribution-in-a-solid-tumor-mouse-model
#16
Danielle Mandikian, Nene Takahashi, Amy A Lo, Ji Li, Jeffrey Eastham-Anderson, Dionysos Slaga, Jason Ho, Maria Hristopoulos, Robyn Clark, Klara Totpal, Kedan Lin, Sean B Joseph, Mark S Dennis, Saileta Prabhu, Teemu T Junttila, C Andrew Boswell
Anti-HER2/CD3, a T cell-dependent bispecific antibody (TDB) construct, induces T cell-mediated cell death in cancer cells expressing HER2 by cross-linking tumor HER2 with CD3 on cytotoxic T cells, thereby creating a functional cytolytic synapse. TDB design is a very challenging process that requires consideration of multiple parameters. While therapeutic antibody design strategy is commonly driven by striving for the highest attainable antigen binding affinity, little is known about how the affinity of each TDB arm can affect the targeting ability of the other arm and the consequent distribution and efficacy...
January 16, 2018: Molecular Cancer Therapeutics
https://www.readbyqxmd.com/read/29339430/simultaneous-binding-of-multiple-ef-tu-copies-to-translating-ribosomes-in-live-escherichia-coli
#17
Mainak Mustafi, James C Weisshaar
In bacteria, elongation factor Tu is a translational cofactor that forms ternary complexes with aminoacyl-tRNA (aa-tRNA) and GTP. Binding of a ternary complex to one of four flexible L7/L12 units on the ribosome tethers a charged tRNA in close proximity to the ribosomal A site. Two sequential tests for a match between the aa-tRNA anticodon and the current mRNA codon then follow. Because one elongation cycle can occur in as little as 50 ms and the vast majority of aa-tRNA copies are not cognate with the current mRNA codon, this testing must occur rapidly...
January 16, 2018: MBio
https://www.readbyqxmd.com/read/29338843/current-status-of-animal-models-of-posttraumatic-stress-disorder-behavioral-and-biological-phenotypes-and-future-challenges-in-improving-translation
#18
REVIEW
Jessica Deslauriers, Mate Toth, Andre Der-Avakian, Victoria B Risbrough
Increasing predictability of animal models of posttraumatic stress disorder (PTSD) has required active collaboration between clinical and preclinical scientists. Modeling PTSD is challenging, as it is a heterogeneous disorder with ≥20 symptoms. Clinical research increasingly utilizes objective biological measures (e.g., imaging, peripheral biomarkers) or nonverbal behaviors and/or physiological responses to complement verbally reported symptoms. This shift toward more-objectively measurable phenotypes enables refinement of current animal models of PTSD, and it supports the incorporation of homologous measures across species...
November 20, 2017: Biological Psychiatry
https://www.readbyqxmd.com/read/29338703/diagnostic-accuracy-and-prediction-increment-of-markers-of-epithelial-mesenchymal-transition-to-assess-cancer-cell-detachment-from-primary-tumors
#19
Evan L Busch, Prabhani Kuruppumullage Don, Haitao Chu, David B Richardson, Temitope O Keku, David A Eberhard, Christy L Avery, Robert S Sandler
BACKGROUND: Metastases play a role in about 90% of cancer deaths. Markers of epithelial-mesenchymal transition (EMT) measured in primary tumor cancer cells might provide diagnostic information about the likelihood that cancer cells have detached from the primary tumor. Used together with established diagnostic tests of detachment-lymph node evaluation and radiologic imaging-EMT marker measurements might improve the ability of clinicians to assess the patient's risk of metastatic disease...
January 16, 2018: BMC Cancer
https://www.readbyqxmd.com/read/29337292/a-rapid-ratiometric-enzyme-free-sensitive-single-step-mirna-detection-using-three-way-junction-based-fret-probes
#20
Qingying Luo, Lin Liu, Cai Yang, Jing Yuan, Hongtao Feng, Yan Chen, Peng Zhao, Zhiqiang Yu, Zongwen Jin
MicroRNAs (miRNAs) are single stranded endogenous molecules composed of only 18-24 nucleotides which are critical for gene expression regulating the translation of messenger RNAs. Conventional methods based on enzyme-assisted nucleic acid amplification techniques have many problems, such as easy contamination, high cost, susceptibility to false amplification, and tendency to have sequence mismatches.Here we report a rapid, ratiometric, enzyme-free, sensitive, and highly selective single-step miRNA detection using three-way junction assembled (or self-assembled) FRET probes...
January 16, 2018: Nanotechnology
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