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https://www.readbyqxmd.com/read/29792913/comparison-of-cerebral-ventricular-volumes-and-cortical-thicknesses-in-normal-rats-and-genetic-absence-epilepsy-gaers-a-developmental-study
#1
Özlem Kirazlı, Hüsniye Hacıoğlu Bay, Yusuf Özgür Çakmak, Filiz Onat, Safiye Çavdar
Ventricular enlargement and cortical atrophy have been associated with various central nervous system diseases. The aim of the present study was to measure the volumes of the lateral (LV) and third (3V) ventricles and to determine the cortical thickness for the motor (MCx), somatosensory (SSCx), visual (VCx) and auditory (AuCx) cortex and the striatum of Wistar rats, in a developmental series at 10, 20, 30, and 60 days postnatal, and to compare them with similar data from genetic absence epilepsy rats from Strasbourg (GAERS)...
May 21, 2018: International Journal of Developmental Neuroscience
https://www.readbyqxmd.com/read/29792720/-experimental-processing-of-corrosion-casts-of-large-animal-organs
#2
R Pálek, V Liška, L Eberlová, H Mírka, M Svoboda, S Haviar, M Emingr, O Brzoň, P Mik, V Třeška
INTRODUCTION: Corrosion casts (CCs) are used for the visualization and assessment of hollow structures. CCs with filled capillaries enable (with the help of imaging methods) to obtain data for mathematical organ perfusion modelling. As the processing is more difficult in case of organs with greater volume of the vasculature, mainly organs from small animals have been cast up to now. The aim of this study was to optimize the protocol of corrosion casting of different organs of pig. Porcine organs are relatively easily accessible and frequently used in experimental medicine...
2018: Rozhledy V Chirurgii: Měsíčník Československé Chirurgické Společnosti
https://www.readbyqxmd.com/read/29792719/-sinusoidal-obstruction-syndrome-induced-by-monocrotaline-in-a-large-animal-experiment-a-pilot-study
#3
R Pálek, V Liška, V Třeška, J Rosendorf, M Emingr, V Tégl, A Králíčková, K Bajcurová, M Jiřík, Z Tonar
INTRODUCTION: Sinusoidal obstruction syndrome (SOS) is a disease which is caused by toxic injury to hepatic sinusoids. This syndrome is most frequently caused by myeloablative radiochemotherapy in patients before hematopoietic stem cells transplantation and also by oxaliplatin mainly in patients with colorectal liver metastases. The aim of this study was to establish a large animal model of SOS, which would enable further study of this disease and facilitate translation of experimental outcomes into human medicine...
2018: Rozhledy V Chirurgii: Měsíčník Československé Chirurgické Společnosti
https://www.readbyqxmd.com/read/29792273/heterogeneity-of-renal-cortical-oxygenation-seeing-is-believing
#4
Roger G Evans, Connie P C Ow
The limited spatial and temporal resolution of available methods for quantifying renal tissue oxygen tension is a major impediment to identification of the roles of renal hypoxia in kidney diseases. Intravital phosphorescence lifetime imaging microscopy allows cellular oxygen tension in the renal cortex of live animals to be resolved to the level of individual tubular cross-sections. This paves the way for future investigations of the spatial relationships between cellular hypoxia and pathophysiological events in kidney disease...
June 2018: Kidney International
https://www.readbyqxmd.com/read/29791295/ultrasonographic-detection-of-ingested-fishing-lines-in-loggerheads-caretta-caretta
#5
Delia Franchini, Carmela Valastro, Stefano Ciccarelli, Francesco Caprio, Diana Lenoci, Antonio Di Bello
Loggerhead sea turtles ( Caretta caretta) are among the most frequent victims of bycatch in drifting longlines, and the ingestion of fish hooks and fishing lines is one of the most frequent causes of death of sea turtles. The aim of this study was to evaluate whether coelomic ultrasound (US) can be decisive, not only for diagnosis but also to optimize surgical planning based on preoperative evaluation of the bowel conditions and, in addition, to see if there are characteristic sonographic findings in sea turtles associated with the ingestion of fishing lines...
May 23, 2018: Journal of Wildlife Diseases
https://www.readbyqxmd.com/read/29791151/recent-advances-and-progress-on-melanin-like-materials-and-their-biomedical-applications
#6
Long Huang, Meiying Liu, Hongye Huang, Yuanqing Wen, Xiaoyong Zhang, Yen Wei
Melanins are well-known biopolymers that are ubiquitous in nature, distributed widely in microorganisms, plants, and animals, and play significant physiological roles. They are mostly biopolymers formed from phenolic compounds by polymerization via quinones. Poly(dopamine) (PDA), a melanin-like material, is similar in structure and properties to eumelanin and has attracted considerable interest for various types of biological applications. This review outlines the recent advances in the structure and synthesis of PDA and discusses applications of PDA in many biological fields, such as biological imaging, photothermal therapy, and drug delivery systems...
May 23, 2018: Biomacromolecules
https://www.readbyqxmd.com/read/29790719/less-is-more-as-less-as-reasonably-achievable-stenting-alaras-strategy-in-the-femoropopliteal-area
#7
Koen Deloose, Joren Callaert
BACKGROUND: Although evidence supports that the performance of drug coated balloons seems to be lesion complexity independent, it is quite clear that in long lesions, severe calcified lesions and chronic total occlusions, the bail out stent ratio is very high and that the "leaving nothing behind" strategy remains a dream in a lot of our daily cases. On the other side of the spectrum, "full metal jackets" of nitinol stents are creating even more problems. Stent fractures, intimal hyperplasia and reintervention difficulties complicate the recurrent vascular disease treatment...
May 23, 2018: Journal of Cardiovascular Surgery
https://www.readbyqxmd.com/read/29789990/fatal-pulmonary-and-cerebellar-zygomycosis-due-to-rhizomucor-pusillus-in-a-ringed-seal-pusa-hispida
#8
Shotaro Nakagun, Masako Okazaki, Takahito Toyotome, Nobuki Sugiyama, Kenichi Watanabe, Noriyuki Horiuchi, Yoshiyasu Kobayashi
A 4-year-old captive ringed seal (Pusa hispida) was treated with subcutaneous antibacterial injections for pus exuding wounds in the skin and associated blubber following a bite attack. Three months after the incident, the animal presented nystagmus and died the following day. At necropsy, there was a 25 × 18 × 25 mm well-delineated, opaque nodular mass in the lung, besides the skin ulcers and localized areas of discoloration in the blubber correlating with the bite wound and injection sites. Histopathology of the pulmonary mass demonstrated severe eosinophilic inflammatory infiltration among numerous intralesional fungal hyphae...
May 22, 2018: Mycopathologia
https://www.readbyqxmd.com/read/29789903/stabilization-of-symptomatic-carotid-atherosclerotic-plaques-by-statins-a-clinico-pathological-analysis
#9
Takao Konishi, Naohiro Funayama, Tadashi Yamamoto, Daisuke Hotta, Ryota Nomura, Yusuke Nakagaki, Takeo Murahashi, Kenji Kamiyama, Tetsuyuki Yoshimoto, Takeshi Aoki, Shinya Tanaka
Human and animal studies have revealed a stabilization of atherosclerotic plaques by statins. However, the stabilization of human carotid plaques has not been thoroughly described pathologically. This analysis explored the relationship between statin therapy and plaque stability in carotid endarterectomy (CEA) specimens. We analyzed specimens harvested between May 2015 and February 2017, from 79 consecutive patients presenting with > 70% carotid artery stenoses, of whom 66 were untreated (group 1) and 13 treated (group 2) with a statin...
May 22, 2018: Heart and Vessels
https://www.readbyqxmd.com/read/29789717/multicellular-detachment-generates-metastatic-spheroids-during-intra-abdominal-dissemination-in-epithelial-ovarian-cancer
#10
Sara Al Habyan, Christina Kalos, Joseph Szymborski, Luke McCaffrey
Ovarian cancer is the most lethal gynecological cancer, where survival rates have had modest improvement over the last 30 years. Metastasis of cancer cells is a major clinical problem, and patient mortality occurs when ovarian cancer cells spread beyond the confinement of ovaries. Disseminated ovarian cancer cells typically spread within the abdomen, where ascites accumulation aids in their transit. Metastatic ascites contain multicellular spheroids, which promote chemo-resistance and recurrence. However, little is known about the origin and mechanisms through which spheroids arise...
May 23, 2018: Oncogene
https://www.readbyqxmd.com/read/29789548/deep-2-photon-imaging-and-artifact-free-optogenetics-through-transparent-graphene-microelectrode-arrays
#11
Martin Thunemann, Yichen Lu, Xin Liu, Kıvılcım Kılıç, Michèle Desjardins, Matthieu Vandenberghe, Sanaz Sadegh, Payam A Saisan, Qun Cheng, Kimberly L Weldy, Hongming Lyu, Srdjan Djurovic, Ole A Andreassen, Anders M Dale, Anna Devor, Duygu Kuzum
Recent advances in optical technologies such as multi-photon microscopy and optogenetics have revolutionized our ability to record and manipulate neuronal activity. Combining optical techniques with electrical recordings is of critical importance to connect the large body of neuroscience knowledge obtained from animal models to human studies mainly relying on electrophysiological recordings of brain-scale activity. However, integration of optical modalities with electrical recordings is challenging due to generation of light-induced artifacts...
May 23, 2018: Nature Communications
https://www.readbyqxmd.com/read/29789523/focal-brain-lesions-induced-with-ultraviolet-irradiation
#12
Mariko Nakata, Kazuaki Nagasaka, Masayuki Shimoda, Ichiro Takashima, Shinya Yamamoto
Lesion and inactivation methods have played important roles in neuroscience studies. However, traditional techniques for creating a brain lesion are highly invasive, and control of lesion size and shape using these techniques is not easy. Here, we developed a novel method for creating a lesion on the cortical surface via 365 nm ultraviolet (UV) irradiation without breaking the dura mater. We demonstrated that 2.0 mWh UV irradiation, but not the same amount of non-UV light irradiation, induced an inverted bell-shaped lesion with neuronal loss and accumulation of glial cells...
May 22, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29788422/n-acetyl-and-glutamatergic-neurometabolites-in-perisylvian-brain-regions-of-methamphetamine-users
#13
Jinsong Tang, Joseph O'Neill, Jeffry R Alger, Zhiwei Shen, Maritza C Johnson, Edythe D London
Background: Methamphetamine induces neuronal N-acetyl-aspartate synthesis in preclinical studies. In a preliminary human proton magnetic resonance spectroscopic imaging investigation, we also observed that N-acetyl-aspartate+N-acetyl-aspartyl-glutamate in right inferior frontal cortex correlated with years of heavy methamphetamine abuse. In the same brain region, glutamate+glutamine is lower in methamphetamine users than in controls and is negatively correlated with depression. N-acetyl and glutamatergic neurochemistries therefore merit further investigation in methamphetamine abuse and the associated mood symptoms...
May 21, 2018: International Journal of Neuropsychopharmacology
https://www.readbyqxmd.com/read/29787874/ancient-observation-of-spinal-cord-injury-the-case-of-the-assiryan-lion
#14
REVIEW
Gustavo J Luvizutto, Emerson G Siqueira, Pedro Tadao Hamamoto Filho, Viviane F Zétola, Marcos C Lange, Hélio A Theive, Luiz A Resende, Rodrigo Bazan
The description of paraplegia is considered a milestone in the history of neurology. The Egyptians provided excellent descriptions of spinal cord injuries, the Bible has several references to paraplegia, and, more recently, the pioneers of neurology described the classic syndromes related to spinal injuries and paraplegia. Here, we describe an ancient observation by the Assyrian people of paraplegia in an animal. In ancient Assyria, lion hunting was a ritualized activity conducted for political and religious purposes...
May 19, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29786788/transplantable-animal-studies-and-whole-body-optical-imaging-in-prostate-carcinoma
#15
Geertje van der Horst, Maaike van der Mark, Henry Cheung, Gabri van der Pluijm
Current treatments of advanced prostate cancer only marginally increase overall survival and can be regarded as predominantly palliative. Hence, there is an urgent need for novel therapeutic strategies for the treatment of primary tumors and, more importantly perhaps, for the prevention of tumor progression and metastasis formation. Clinically relevant preclinical models are therefore urgently needed. An ideal, clinically relevant preclinical model would mimic the genetic and phenotypic changes that occur at the different stages of human prostate cancer progression and subsequent metastasis...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29786719/energy-transfer-chemiluminescence-for-ratiometric-ph-imaging
#16
Weiwei An, Ralph P Mason, Alexander R Lippert
Chemiluminescence imaging offers a low background and high sensitivity approach to imaging analytes in living cells and animals. Intensity-based measurements have been developed, but require careful consideration of kinetics, probe localization, and fluctuations in quantum yield, all of which complicate quantification. Here, we report a ratiometric strategy for quantitative chemiluminescence imaging of pH. The strategy relies on an energy transfer cascade of chemiluminescence emission from a spiroadamantane 1,2-dioxetane to a ratiometric pH indicator via fluorescent dyes in Enhancer solutions...
May 22, 2018: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/29785469/early-detection-of-cerebral-infarction-after-focal-ischemia-using-a-new-mri-indicator
#17
Yukako Nakajo, Qiang Zhao, Jun-Ichiro Enmi, Hidehiro Iida, Jun C Takahashi, Hiroharu Kataoka, Keiko Yamato, Hiroji Yanamoto
Prolongation of the T2 relaxation time, an increase in T2-weighted signal intensity (T2-SI), and a decrease in the apparent diffusion coefficient (ADC) calculated from diffusion-weighted images (DWI) on magnetic resonance imaging (MRI) are conventional indicators of the vasogenic (interstitial) or cytotoxic (cellular) cerebral edema that develops after ischemic stroke. However, these parameters obtained on stroke imaging have not given us a precise threshold at which we can determine the viability or vulnerability of the tissue, allowing us to decide on an intervention that will help reversible tissue in the acute phase...
May 21, 2018: Molecular Neurobiology
https://www.readbyqxmd.com/read/29785226/progressive-assessment-of-ischemic-injury-to-white-matter-using-diffusion-tensor-imaging-a-preliminary-study-of-a-macaque-model-of-stroke
#18
Xiaodong Zhang, Yumei Yan, Frank Tong, Chun-Xia Li, Benjamin Jones, Silun Wang, Yuguang Meng, E Chris Muly, Doty Kempf, Leonard Howell
Background: Previous Diffusion Tensor Imaging (DTI) studies have demonstrated the temporal evolution of stroke injury in grey matter and white matter can be characterized by DTI indices. However, it still remains not fully understood how the DTI indices of white matter are altered progressively during the hyperacute (first 6 hours) and acute stage of stroke (≤ 1 week). In the present study, DTI was employed to characterize the temporal evolution of infarction and white matter injury after stroke insult using a macaque model with permanent ischemic occlusion...
2018: Open Neuroimaging Journal
https://www.readbyqxmd.com/read/29784761/slc15a2-and-slc15a4-mediate-the-transport-of-bacterially-derived-di-tripeptides-to-enhance-the-nucleotide-binding-oligomerization-domain-dependent-immune-response-in-mouse-bone-marrow-derived-macrophages
#19
Yongjun Hu, Feifeng Song, Huidi Jiang, Gabriel Nuñez, David E Smith
There is increasing evidence that proton-coupled oligopeptide transporters (POTs) can transport bacterially derived chemotactic peptides and therefore reside at the critical interface of innate immune responses and regulation. However, there is substantial contention regarding how these bacterial peptides access the cytosol to exert their effects and which POTs are involved in facilitating this process. Thus, the current study proposed to determine the (sub)cellular expression and functional activity of POTs in macrophages derived from mouse bone marrow and to evaluate the effect of specific POT deletion on the production of inflammatory cytokines in wild-type, Pept2 knockout and Pht1 knockout mice...
May 21, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29784664/a-guide-to-using-functional-magnetic-resonance-imaging-to-study-alzheimer-s-disease-in-animal-models
#20
REVIEW
Mazen Asaad, Jin Hyung Lee
Alzheimer's disease is a leading healthcare challenge facing our society today. Functional magnetic resonance imaging (fMRI) of the brain has played an important role in our efforts to understand how Alzheimer's disease alters brain function. Using fMRI in animal models of Alzheimer's disease has the potential to provide us with a more comprehensive understanding of the observations made in human clinical fMRI studies. However, using fMRI in animal models of Alzheimer's disease presents some unique challenges...
May 18, 2018: Disease Models & Mechanisms
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