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https://www.readbyqxmd.com/read/29149239/label-free-in-vivo-imaging-of-corneal-lymphatic-vessels-using-microscopic-optical-coherence-tomography
#1
Jens Horstmann, Hinnerk Schulz-Hildebrandt, Felix Bock, Sebastian Siebelmann, Eva Lankenau, Gereon Hüttmann, Philipp Steven, Claus Cursiefen
Purpose: Corneal neovascularization, in particular lymphangiogenesis, is a limiting factor in corneal transplant survival. Novel treatment approaches focus on (selective) inhibition and regression of lymphatic vessels. Imaging clinically invisible corneal lymphatic vessels is a prerequisite for these strategies. Using a murine model, this study investigates whether corneal lymphatic vessels can be imaged using microscopic optical coherence tomography (mOCT). Methods: Corneal neovascularization was induced by intrastromal placement of 11...
November 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29148430/low-dose-4d-cardiac-imaging-in-small-animals-using-dual-source-micro-ct
#2
Matthew Holbrook, Darin P Clark, Cristian T Badea
Micro-CT is widely used in preclinical studies, generating substantial interest in extending its capabilities in functional imaging applications such as blood perfusion and cardiac function. However, imaging cardiac structure and function in mice is challenging due to their small size and rapid heart rate. To overcome these challenges, we propose and compare improvements on two strategies for cardiac gating in dual-source, preclinical micro-CT: fast prospective gating (PG) and uncorrelated retrospective gating (RG)...
November 17, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29148253/quantification-of-vascular-damage-in-acute-kidney-injury-with-fluorine-magnetic-resonance-imaging-and-spectroscopy
#3
Jeremy K Moore, Junjie Chen, Hua Pan, Joseph P Gaut, Sanjay Jain, Samuel A Wickline
PURPOSE: To design a fluorine MRI/MR spectroscopy approach to quantify renal vascular damage after ischemia-reperfusion injury, and the therapeutic response to antithrombin nanoparticles (NPs) to protect kidney function. METHODS: A total of 53 rats underwent 45 min of bilateral renal artery occlusion and were treated at reperfusion with either plain perfluorocarbon NPs or NPs functionalized with a direct thrombin inhibitor (PPACK:phenyalanine-proline-arginine-chloromethylketone)...
November 16, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/29148118/role-of-the-combination-of-fa-and-t2-parameters-as-a-new-diagnostic-method-in-therapeutic-evaluation-of-parkinson-s-disease
#4
Yuan Fang, Tao Zheng, Lanxiang Liu, Dawei Gao, Qinglei Shi, Yanchao Dong, Dan Du
BACKGROUND: Simple diffusion delivery (SDD) has attained good effects with only tiny amounts of drugs. Fractional anisotropy (FA) and relaxation time T2* that indicate the integrity of fiber tracts and iron concentration within brain tissue were used to evaluate the therapeutic effect of SDD. PURPOSE: To evaluate therapeutic effect of SDD in the Parkinson's disease (PD) rat model with FA and T2* parameters. STUDY TYPE: Prospective case-control animal study...
November 17, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29147108/muc1-aptamer-targeted-sers-nanoprobes
#5
Suchetan Pal, Stefan Harmsen, Anton Oseledchyk, Hsiao-Ting Hsu, Moritz F Kircher
Recently, surface-enhanced Raman scattering (SERS) nanoprobes (NPs) have shown promise in the field of cancer imaging due to their unparalleled signal specificity and high sensitivity. Here we report the development of a DNA aptamer targeted SERS NP. Recently, aptamers are being investigated as a viable alternative to more traditional antibody targeting due to their low immunogenicity and low cost of production. We developed a strategy to functionalize SERS NPs with DNA aptamers, which target Mucin1 (MUC1) in human breast cancer (BC)...
August 25, 2017: Advanced Functional Materials
https://www.readbyqxmd.com/read/29146192/calcium-imaging-method-to-visualize-the-spatial-patterns-of-neural-responses-in-the-pygmy-squid-idiosepius-paradoxus-central-nervous-system
#6
Motoki Koizumi, Shuichi Shigeno, Makoto Mizunami, Nobuaki K Tanaka
BACKGROUND: Cephalopods exhibit unique behaviors such as camouflage and tactile learning. The brain functions correlated to these behaviors have long been analyzed through behavioral observations of animals subject to surgical manipulation or electrical stimulation of brain lobes. However, physiological methods have rarely been introduced to investigate the functions of each individual lobe, though physiological work on giant axons and slices of the vertical lobe system of the cephalopods have provided deep insights into ion conductance of nerves and long-term synaptic plasticity...
November 13, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/29145733/harnessing-novel-imaging-approaches-to-guide-hiv-prevention-and-cure-discoveries-a-national-institutes-of-health-and-global-hiv-vaccine-enterprise-2017-meeting-report
#7
Brigitte Elisabeth Sanders-Beer, Yegor Voronin, David McDonald, Anjali Singh
Advances in imaging technologies have greatly increased our understanding of cellular and molecular interactions in humans and their corresponding animal models of infectious diseases. In the HIV/SIV field, imaging has provided key insights into mucosal viral transmission, local and systemic virus spread, host-virus dynamics, and chronic inflammation/immune activation and the resultant immunopathology. Recent developments in imaging applications are yielding physical, spatial, and temporal measurements to enhance insight into biological functions and disease processes, while retaining important cellular, microenvironmental, organ and intact organism contextual details...
November 16, 2017: AIDS Research and Human Retroviruses
https://www.readbyqxmd.com/read/29145689/-ultra-high-field-mri-in-the-chicken-embryo-in-ovo-a-model-for-experimental-ophthalmology
#8
Ronja Klose, Felix Streckenbach, Stefan Hadlich, Thomas Stahnke, Rudolf Guthoff, Andreas Wree, Marcus Frank, Sönke Langner, Oliver Stachs, Tobias Lindner
Ultra-high-field MRI (UHF-MRI) is an outstanding technique for non-invasive and non-destructive imaging of soft tissues and can provide versatile contrasts and high resolution in the µm range. In vivo imaging of the embryonal chick eye with its filigree anatomical structures imposes these requirements. However, due to the short embryonal development cycle, chicken are a favourite animal model for embryonal research studies. Ultra-high-field MRI allows repeated and longitudinal in ovo investigations on the same embryo...
November 16, 2017: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/29143987/effect-of-body-temperature-on-the-pharmacokinetics-of-a-triarylmethyl-type-paramagnetic-contrast-agent-used-in-epr-oximetry
#9
Ken-Ichiro Matsumoto, Fuminori Hyodo, James B Mitchell, Murali C Krishna
PURPOSE: Pharmacokinetics of the tri[8-carboxy-2,2,6,6-tetrakis(2-hydroxymethyl)benzo[1,2-d:4,5-d']bis(1,3)dithio-4-yl]methyl radical (Oxo63) after a single bolus and/or continuous intravenous infusion was investigated in tumor-bearing C3H mice with or without body temperature control while under anesthesia. METHOD: The in vivo time course of Oxo63 in blood was measured using X-band electron paramagnetic resonance spectroscopy. Distribution of Oxo63 in normal muscle and tumor tissues was obtained using a surface coil resonator and a 700-MHz electron paramagnetic resonance spectrometer...
November 16, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/29142256/quantitative-analysis-of-protein-protein-interactions-and-post-translational-modifications-in-rare-immune-populations
#10
Ayelet Avin, Maayan Levy, Ziv Porat, Jakub Abramson
In spite of recent advances in proteomics, quantitative analyses of protein-protein interactions (PPIs) or post-translational modifications (PTMs) in rare cell populations remain challenging. This is in particular true for analyses of rare immune and/or stem cell populations that are directly isolated from humans or animal models, and which are often characterized by multiple surface markers. To overcome these limitations, here we have developed proximity ligation imaging cytometry (PLIC), a protocol for proteomic analysis of rare cells...
November 15, 2017: Nature Communications
https://www.readbyqxmd.com/read/29142057/morphofunctional-experience-dependent-plasticity-in-the-honeybee-brain
#11
Mara Andrione, Benjamin F Timberlake, Giorgio Vallortigara, Renzo Antolini, Albrecht Haase
Repeated or prolonged exposure to an odorant without any positive or negative reinforcement produces experience-dependent plasticity, which results in habituation and latent inhibition. In the honeybee (Apis mellifera), it has been demonstrated that, even if the absolute neural representation of an odor in the primary olfactory center, the antennal lobe (AL), is not changed by repeated presentations, its relative representation with respect to unfamiliar stimuli is modified. In particular, the representation of a stimulus composed of a 50:50 mixture of a familiar and a novel odorant becomes more similar to that of the novel stimulus after repeated stimulus preexposure...
December 2017: Learning & Memory
https://www.readbyqxmd.com/read/29141866/prostate-specific-membrane-antigen-cleavage-of-vitamin-b9-stimulates-oncogenic-signaling-through-metabotropic-glutamate-receptors
#12
Charalambos Kaittanis, Chrysafis Andreou, Haley Hieronymus, Ninghui Mao, Catherine A Foss, Matthias Eiber, Gregor Weirich, Palak Panchal, Anuradha Gopalan, Juan Zurita, Samuel Achilefu, Gabriela Chiosis, Vladimir Ponomarev, Markus Schwaiger, Brett S Carver, Martin G Pomper, Jan Grimm
Prostate-specific membrane antigen (PSMA) or folate hydrolase 1 (FOLH1) is highly expressed on prostate cancer. Its expression correlates inversely with survival and increases with tumor grade. However, the biological role of PSMA has not been explored, and its role in prostate cancer remained elusive. Filling this gap, we demonstrate that in prostate cancer, PSMA initiates signaling upstream of PI3K through G protein-coupled receptors, specifically via the metabotropic glutamate receptor (mGluR). PSMA's carboxypeptidase activity releases glutamate from vitamin B9 and other glutamated substrates, which activate mGluR I...
November 15, 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/29141275/roles-of-the-declive-folium-and-tuber-cerebellar-vermian-lobules-in-sportspeople
#13
In Sung Park, Nam Joon Lee, Im Joo Rhyu
The cerebellum plays vital roles in balance control and motor learning, including in saccadic adaptation and coordination. It consists of the vermis and two hemispheres and is anatomically separated into ten lobules that are designated as I-X. Although neuroimaging and clinical studies suggest that functions are compartmentalized within the cerebellum, the function of each cerebellar lobule is not fully understood. Electrophysiological and lesion studies in animals as well as neuroimaging and lesion studies in humans have revealed that vermian lobules VI and VII (declive, folium, and tuber) are critical for controlling postural balance, saccadic eye movements, and coordination...
September 28, 2017: Journal of Clinical Neurology
https://www.readbyqxmd.com/read/29140184/refining-the-ischemic-penumbra-with-topography
#14
Tharani Thirugnanachandran, Henry Ma, Shaloo Singhal, Lee-Anne Slater, Stephen M Davis, Geoffrey A Donnan, Thanh Phan
It has been 40 years since the ischemic penumbra was first conceptualized through work on animal models. The topography of penumbra has been portrayed as an infarcted core surrounded by penumbral tissue and an extreme rim of oligemic tissue. This picture has been used in many review articles and textbooks before the advent of modern imaging. In this paper, we review our understanding of the topography of the ischemic penumbra from the initial experimental animal models to current developments with neuroimaging which have helped to further define the temporal and spatial evolution of the penumbra and refine our knowledge...
January 1, 2017: International Journal of Stroke: Official Journal of the International Stroke Society
https://www.readbyqxmd.com/read/29139484/ftir-imaging-detects-diet-and-genotype-dependent-chemical-composition-changes-in-wild-type-and-mutant-c-elegans-strains
#15
A Bouyanfif, S Liyanage, J E Hewitt, S A Vanapalli, N Moustaid-Moussa, E Hequet, N Abidi
This study focuses on the use of Fourier Transform Infrared (FTIR) microspectroscopy to determine chemical changes induced in the nematode Caenorhabditis elegans by supplementation of C. elegans maintenance media (CeMM) by Eicosapentaenoic acid (EPA). Wild-type C. elegans (N2) and mutant strains (tub-1 and fat-3) were grown in CeMM alone, and CeMM supplemented with EPA at 25 or 100 μM. Feeding was performed for 72 h. FTIR imaging was performed in transmission mode on individual worms. The FTIR imaging analysis of wild-type animals revealed the presence of vibrations assigned to unsaturated fatty acids, specifically bands at 3008 cm(-1) ([double bond, length as m-dash]C-H, olefinic stretch) and 1744 cm(-1) (C[double bond, length as m-dash]O, unsaturated fatty acids)...
November 15, 2017: Analyst
https://www.readbyqxmd.com/read/29139034/vessel-centerline-reconstruction-from-non-isocentric-and-non-orthogonal-paired-monoplane-angiographic-images
#16
Mie Kunio, Caroline C O'Brien, Augusto C Lopes, Lynn Bailey, Pedro A Lemos, Guillermo J Tearney, Elazer R Edelman
PURPOSE: Three-dimensional reconstruction of a vessel centerline from paired planar coronary angiographic images is critical to reconstruct the complex three-dimensional structure of the coronary artery lumen and the relative positioning of implanted devices. In this study, a new vessel centerline reconstruction method that can utilize non-isocentric and non-orthogonal pairs of angiographic images was developed and tested. METHODS: Our new method was developed in in vitro phantom models of bifurcated coronary artery with and without stent, and then tested in in vivo swine models (twelve coronary arteries)...
November 14, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/29138746/a-novel-encephalopathy-in-a-thiamine-deficient-dog-resembling-human-wernicke-s-disease-with-atypical-mri-pattern
#17
Floriana Gernone, Mario Ricciardi
Thiamine is a water-soluble vitamin, which participates in several vital metabolic pathways involved in energy metabolism and neurotransmitter synthesis of mammals. In companion animals thiamine deficiency is classically associated with signs of diffuse encephalopathy and lesions on brainstem nuclei and mesencephalic colliculi evident on magnetic resonance imaging. This paper describes a novel clinical presentation in a thiamine-deficient dog showing multifocal, central and peripheral nervous and cardiovascular system alterations...
2017: Open veterinary journal
https://www.readbyqxmd.com/read/29138745/spontaneous-nervous-system-concussion-in-dogs-a-description-of-two-cases-and-a-review-of-terminology-in-veterinary-medicine
#18
Angelo Pasquale Giannuzzi, Antonio De Simone, Mario Ricciardi
In human medicine, central nervous system (CNS) concussion is defined as a transient neurological dysfunction following a traumatic event, without evidence of structural abnormalities of the affected region on advanced diagnostic imaging. Depending on the anatomical region involved, three forms of concussive syndromes are described: brain concussion, spinal concussion and cerebellar concussion. Although major textbooks of veterinary neurology admit the existence of canine brain concussion, spontaneous cases of this pathological condition have not been reported in small animals so far...
2017: Open veterinary journal
https://www.readbyqxmd.com/read/29138636/stem-cell-tracking-technologies-for-neurological-regenerative-medicine-purposes
#19
REVIEW
Yongtao Zheng, Jiongwei Huang, Tongming Zhu, Ronggang Li, Zhifu Wang, Fukai Ma, Jianhong Zhu
The growing field of stem cell therapy is moving toward clinical trials in a variety of applications, particularly for neurological diseases. However, this translation of cell therapies into humans has prompted a need to create innovative and breakthrough methods for stem cell tracing, to explore the migration routes and its reciprocity with microenvironment targets in the body, to monitor and track the outcome after stem cell transplantation therapy, and to track the distribution and cell viability of transplanted cells noninvasively and longitudinally...
2017: Stem Cells International
https://www.readbyqxmd.com/read/29138563/squarticles-as-the-nanoantidotes-to-sequester-the-overdosed-antidepressant-for-detoxification
#20
Chun-Han Chen, Tse-Hung Huang, Ahmed O Elzoghby, Pei-Wen Wang, Chia-Wen Chang, Jia-You Fang
The increasing death rate caused by drug overdose points to an urgent demand for the development of novel detoxification therapy. In an attempt to detoxify tricyclic antidepressant overdose, we prepared a lipid nanoemulsion, called squarticles, as the nanoantidote. Squalene was the major lipid matrix of the squarticles. Here, we present the animal study to investigate both the pharmacokinetic and pharmacodynamic effects of squarticles on amitriptyline intoxication. The anionic and cationic squarticles had average diameters of 97 and 122 nm, respectively...
2017: International Journal of Nanomedicine
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