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https://www.readbyqxmd.com/read/29166718/-value-of-two-left-atrium-and-pulmonary-vein-stereoscopic-imaging-reconstruction-methods-on-guiding-radiofrequency-ablation-for-atrial-fibrillation
#1
Y Tian, S Zhou, Y H Yin, Y X Zheng, R P Wang, X Q Liu, Z Q Liu, Q F Liu, W Liu, J Pang, Z Jiang, L H Tian, J Huang, L Yang
Objective: To compare the value of two 3D imaging reconstruction methods for left atria and pulmonary vein on guiding the catheter ablation for atrial fibrillation (AF). Methods: From January 2014 to January 2017, a total of 100 drug refractory paroxysmal AF patients were divided into left atria direct angiography group (n=50), and indirect angiography group (n=50). 3D CARTO system was applied for mapping and guiding the ablation procedure. Patients assigned to direct angiography group were treated as follows: intraoperative puncture of atrial septum, inject contrast agent directly into the left atrium, conduct left atrial and pulmonary venous rotation angiography, reconstruct three-dimensional image, integrate the image into real-time X-ray system to facilitate circumferential pulmonary vein isolation...
November 24, 2017: Zhonghua Xin Xue Guan Bing za Zhi
https://www.readbyqxmd.com/read/29166300/effect-of-age-on-high-t1-signal-intensity-of-the-dentate-nucleus-and-globus-pallidus-in-a-large-population-exposed-to-gadodiamide
#2
Carlo Cosimo Quattrocchi, Yuri Errante, Carlo Augusto Mallio, Luca Marinelli, Gianguido LoVullo, Gabriele Giannotti, Sabino Walter Della Sala, Aart J van der Molen, Bruno Beomonte Zobel
OBJECTIVE: The purpose of this study was to assess the effect of age and number of previous injections of gadodiamide on the signal intensity of unenhanced T1-weighted (T1w) images of the dentate nucleus and globus pallidus in a large population. MATERIALS AND METHODS: A large, single-center retrospective population survey was designed and received institutional review board approval. Between January 2014 and December 2014, T1w signal intensity ratios were obtained from a large population of 2500 consecutive enhanced brain magnetic resonance imaging (MRI) scans...
November 21, 2017: Investigative Radiology
https://www.readbyqxmd.com/read/29165814/reverse-effect-of-opuntia-ficus-indica-l-juice-and-seeds-aqueous-extract-on-gastric-emptying-and-small-bowel-motility-in-rat
#3
Kaïs Rtibi, Slimen Selmi, Khouloud Saidani, Dhekra Grami, Mohamed Amri, Hichem Sebai, Lamjed Marzouki
This study was conducted to compare the effects of juice and seeds on gastric emptying, small-bowel motility and intestinal ion transport. Separate groups of rats were randomized to receive NaCl, increasing doses of juice (5, 10, and 20 mL/kg, b.w.) or seeds aqueous extract (100, 200, and 400 mg/kg, b.w.). Simultaneously, two other groups were received, the reference drugs; clonidine (1 mg/kg) and yohimbine (2 mg/kg). The charcoal meal was used as a suspension for gastrointestinal motility test. The purgative action of juice was confirmed using the loperamide (5 mg/kg, p...
November 22, 2017: Journal of Food Science
https://www.readbyqxmd.com/read/29165498/tomographic-magnetic-particle-imaging-of-cancer-targeted-nanoparticles
#4
Hamed Arami, Eric Teeman, Alyssa Troksa, Haydin Bradshaw, Katayoun Saatchi, Asahi Tomitaka, Sanjiv Sam Gambhir, Urs O Häfeli, Denny Liggitt, Kannan M Krishnan
Magnetic Particle Imaging (MPI) is an emerging, whole body biomedical imaging technique, with sub-millimeter spatial resolution and high sensitivity to a biocompatible contrast agent consisting of an iron oxide nanoparticle core and a biofunctionalized shell. Successful application of MPI for imaging of cancer depends on the nanoparticles (NPs) accumulating at tumors at sufficient levels relative to other sites. NPs' physiochemical properties such as size, crystallographic structure and uniformity, surface coating, stability, blood circulation time and magnetization determine the efficacy of their tumor accumulation and MPI signal generation...
November 22, 2017: Nanoscale
https://www.readbyqxmd.com/read/29165388/argan-oil-as-an-effective-nutri-therapeutic-agent-in-metabolic-syndrome-a-preclinical-study
#5
Adil El Midaoui, Youssef Haddad, Younes Filali-Zegzouti, Réjean Couture
The present study aims at examining the effects of argan oil on the three main cardiovascular risk factors associated with metabolic syndrome (hypertension, insulin resistance and obesity) and on one of its main complications, neuropathic pain. Male Sprague-Dawley rats had free access to a drinking solution containing 10% d-glucose or tap water for 12 weeks. The effect of argan oil was compared to that of corn oil given daily by gavage during 12 weeks in glucose-fed rats. Glucose-fed rats showed increases in systolic blood pressure, epididymal fat, plasma levels of triglycerides, leptin, glucose and insulin, insulin resistance, tactile and cold allodynia in association with a rise in superoxide anion production and NADPH oxidase activity in the thoracic aorta, epididymal fat and gastrocnemius muscle...
November 22, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29165364/the-rosiglitazone-like-effects-of-vitexilactone-a-constituent-from-vitex-trifolia-l-in-3t3-l1-preadipocytes
#6
Atsuyoshi Nishina, Masaya Itagaki, Daisuke Sato, Hirokazu Kimura, Yasuaki Hirai, Nyunt Phay, Makoto Makishima
The increased number of patients with type 2 diabetes (T2D) has become a worldwide problem, and insulin sensitizers such as thiazolidinediones (TZDs) are used as therapeutic agents. We found that extracts of Vitex trifolia L. (V. trifolia), a medicinal plant from Myanmar, induced adipogenesis similar to rosiglitazone (ROS), which is a TZD, in 3T3-L1 preadipocytes. In the present study, we attempted to isolate from V. trifolia those compounds that showed ROS-like effects. Among the extracts of hexane, ethyl acetate, and methanol obtained from V...
November 22, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29165073/recent-progress-in-delivery-of-therapeutic-and-imaging-agents-utilizing-organic-inorganic-hybrid-nanoparticles
#7
Haque Sheikh Tanzina, Ezharul Chowdhury
Delivery of conventional small molecule drugs and currently evolving nucleic acid-based therapeutics, such as small interfering RNAs (siRNAs) and genes, and contrast agents for high resolution imaging, to the target site of action is highly demanding to increase the therapeutic and imaging efficacy while minimizing the off-target effects of the delivered molecules, as well as develop novel therapeutic and imaging approaches. Organic-inorganic hybrid nanoparticles offer a number of advantages by combining the unique properties of the organic and inorganic counterparts, thus improving the pharmacokinetic behavior and targetability of drugs and contrast agents, and conferring the exclusive optical and magnetic properties for both therapeutic and imaging purposes...
November 19, 2017: Current Drug Delivery
https://www.readbyqxmd.com/read/29164237/feasibility-study-of-the-3d-visualization-at-high-resolution-of-intra-cranial-rabbit-eyes-with-x-ray-ct-phase-contrast-imaging
#8
Yury Ivanishko, Alberto Bravin, Sergey Kovalev, Polina Lisutina, Mikhail Lotoshnikov, Alberto Mittone, Sergey Tkachev, Marina Tkacheva
Purpose: The intracranial three-dimensional (3D) visualization of the whole volume of the eyeball at micrometric resolution has not been achieved yet either in clinical nor in preclinical diagnostic research. Overcoming this limitation may provide a new tool for clinical and preclinical studies of different pathologies of the various sections of the eye. The aim of this work is to give the first insight of a volumetric visualization at the high resolution of the entire enucleated and intracranial postmortem rabbit eyeballs...
November 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29164069/iron-acquisition-mechanisms-and-their-role-in-the-virulence-of-burkholderia-species
#9
REVIEW
Aaron T Butt, Mark S Thomas
Burkholderia is a genus within the β-Proteobacteriaceae that contains at least 90 validly named species which can be found in a diverse range of environments. A number of pathogenic species occur within the genus. These include Burkholderia cenocepacia and Burkholderia multivorans, opportunistic pathogens that can infect the lungs of patients with cystic fibrosis, and are members of the Burkholderia cepacia complex (Bcc). Burkholderia pseudomallei is also an opportunistic pathogen, but in contrast to Bcc species it causes the tropical human disease melioidosis, while its close relative Burkholderia mallei is the causative agent of glanders in horses...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/29163827/fluorescence-contrast-enhanced-proliferative-lesion-imaging-by-enema-administration-of-indocyanine-green-in-a-rat-model-of-colon-carcinogenesis
#10
Nobuhiko Onda, Reiko Mizutani-Morita, Susumu Yamashita, Rei Nagahara, Shinya Matsumoto, Toshinori Yoshida, Makoto Shibutani
The fluorescent contrast agent indocyanine green (ICG) is approved by the Food and Drug Administration for clinical applications. We previously reported that cultured human colon tumor cells preferentially take up ICG by endocytic activity in association with disruption of their tight junctions. The present study explored ICG availability in fluorescence imaging of the colon to identify proliferative lesions during colonoscopy. The cellular uptake of ICG in cultured rat colon tumor cells was examined using live-cell imaging...
October 27, 2017: Oncotarget
https://www.readbyqxmd.com/read/29163780/hypoxia-inducible-factor-1%C3%AE-activation-in-hpv-positive-head-and-neck-squamous-cell-carcinoma-cell-lines
#11
Jennifer Knuth, Shachi J Sharma, Nora Würdemann, Claudia Holler, Boyan K Garvalov, Till Acker, Claus Wittekindt, Steffen Wagner, Jens P Klussmann
Purpose: Human papillomavirus (HPV) is a causative agent for a rising number of head and neck squamous cell carcinomas (HNSCC), which are characterized by distinct tumor biology. Hypoxia inducible-factor (HIF) signaling influences initiation and progression of carcinogenesis and HPV oncoproteins have evolved to highjack cellular pathways for viral reproduction. Therefore, we investigated whether HPV activates HIF-1α expression in HNSCC. Experimental Technique: HPV-positive and -negative HNSCC cells were examined for adaptive responses to hypoxia...
October 27, 2017: Oncotarget
https://www.readbyqxmd.com/read/29163216/distinct-mechanism-of-cysteine-oxidation-dependent-activation-and-cold-sensitization-of-human-transient-receptor-potential-ankyrin-1-channel-by-high-and-low-oxaliplatin
#12
Takahito Miyake, Saki Nakamura, Zhao Meng, Satoshi Hamano, Keisuke Inoue, Tomohiro Numata, Nobuaki Takahashi, Kazuki Nagayasu, Hisashi Shirakawa, Yasuo Mori, Takayuki Nakagawa, Shuji Kaneko
Oxaliplatin, a third-generation platinum-based chemotherapeutic agent, displays unique acute peripheral neuropathy triggered or enhanced by cold, and accumulating evidence suggests that transient receptor potential ankyrin 1 (TRPA1) is responsible. TRPA1 is activated by oxaliplatin via a glutathione-sensitive mechanism. However, oxaliplatin interrupts hydroxylation of a proline residue located in the N-terminal region of TRPA1 via inhibition of prolyl hydroxylase (PHD), which causes sensitization of TRPA1 to reactive oxygen species (ROS)...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29162867/broad-spectrum-antiviral-agents-secreted-phospholipase-a2-targets-viral-envelope-lipid-bilayers-derived-from-the-endoplasmic-reticulum-membrane
#13
Ming Chen, Chie Aoki-Utsubo, Masanori Kameoka, Lin Deng, Yutaka Terada, Wataru Kamitani, Kei Sato, Yoshio Koyanagi, Makoto Hijikata, Keiko Shindo, Takeshi Noda, Michinori Kohara, Hak Hotta
Hepatitis C virus (HCV), dengue virus (DENV) and Japanese encephalitis virus (JEV) belong to the family Flaviviridae. Their viral particles have the envelope composed of viral proteins and a lipid bilayer acquired from budding through the endoplasmic reticulum (ER). The phospholipid content of the ER membrane differs from that of the plasma membrane (PM). The phospholipase A2 (PLA2) superfamily consists of a large number of members that specifically catalyse the hydrolysis of phospholipids at a particular position...
November 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29162522/loss-of-consciousness-is-related-to-hyper-correlated-gamma-band-activity-in-anesthetized-macaques-and-sleeping-humans
#14
Michał Bola, Adam B Barrett, Andrea Pigorini, Lino Nobili, Anil K Seth, Artur Marchewka
Loss of consciousness can result from a wide range of causes, including natural sleep and pharmacologically induced anesthesia. Important insights might thus come from identifying neuronal mechanisms of loss and re-emergence of consciousness independent of a specific manipulation. Therefore, to seek neuronal signatures of loss of consciousness common to sleep and anesthesia we analyzed spontaneous electrophysiological activity recorded in two experiments. First, electrocorticography (ECoG) acquired from 4 macaque monkeys anesthetized with different anesthetic agents (ketamine, medetomidine, propofol) and, second, stereo-electroencephalography (sEEG) from 10 epilepsy patients in different wake-sleep stages (wakefulness, NREM, REM)...
November 18, 2017: NeuroImage
https://www.readbyqxmd.com/read/29161659/lipopolysaccharide-lps-mediated-priming-of-toll-like-receptor-4-enhances-oxidant-induced-prostaglandin-e2-biosynthesis-in-primary-murine-macrophages
#15
Yan Zhang, Orisa J Igwe
Agonists and pseudo-agonists for toll-like receptor 4 (TLR4) are common in our environment. Thus, human exposure to these agents may result in "priming or sensitization" of TLR4. A body of evidence suggests that LPS-mediated sensitization of TLR4 can increase the magnitude of responses to exogenous agents in multiple tissues. We have previously shown that reactive oxygen and nitrogen species (RONS) stimulate TLR4. There is no evidence that LPS-primed TLR4 can influence the magnitude of responses to oxidants from either endogenous or exogenous sources...
November 18, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/29161153/protective-effects-of-agomelatine-on-testicular-damage-caused-by-bortezomib
#16
N Akaras, T Bal, H Atilay, J Selli, M B Halici
Bortezomib is a chemotherapeutic agent used to treat several cancers; however, it exhibits severe side effects in testicular tissue. We investigated the use of agomelatine to prevent testicular tissue damage caused by bortezomib. We used 36 male Sprague-Dawley rats divided randomly into six equal groups: group 1, no treatment control; group 2, agomelatine treatment only; group 3, bortezomib treatment only for 48 h; group 4, bortezomib + agomelatine treatment for 48 h; group 5, bortezomib treatment only for 72 h; and group 6, bortezomib + agomelatine treatment for 72 h...
November 21, 2017: Biotechnic & Histochemistry: Official Publication of the Biological Stain Commission
https://www.readbyqxmd.com/read/29160953/assessing-hypervalency-in-iodanes
#17
Andras Stirling
The so-called hypervalent iodane compounds are very useful and versatile reactants and oxidizing agents in modern organic chemistry. The hypercoordinated central iodine in these compounds hints hypervalent state which is often stressed to justify their reactivity. In this study a theoretical analysis of the electronic structure of a large, representative set of hypercoordinated iodane compounds has been done. We obtained that the iodonium is not hypervalent in these compounds. In contrast, the analysis reveals a variation of the iodine valence state from normal octet state to hypovalent depending on the ligands, but irrespective of the coordination number...
November 21, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29160060/phase-transition-nanoparticles-as-multimodality-contrast-agents-for-the-detection-of-thrombi-and-targeting-thrombolysis-in-vitro-and-in-vivo-experiments
#18
Jie Xu, Jun Zhou, Yixin Zhong, Yu Zhang, Jia Liu, Yuli Chen, Liming Deng, Danli Sheng, Zhigang Wang, Haitao Ran, Dajing Guo
Thrombotic disease is extremely harmful to human health, and early detection and treatment can improve the prognosis and reduce mortality. Multimodal molecular imaging can provide abundant information about thrombi, but to date, few studies have used multimodal and multifunctional nanoparticles (NPs) for thrombus detection and targeting thrombolysis. In this study, phase transition multimodal and multifunctional NPs (EWVDV-Fe-Ink-PFH NPs) were constructed for the first time using a three-step emulsification and carbodiimide method, and the physical and chemical properties of the NPs were investigated...
November 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29159946/extracellular-volume-with-bolus-only-technique-in-amyloidosis-patients-diagnostic-accuracy-correlation-with-other-clinical-cardiac-measures-and-ability-to-track-changes-in-amyloid-load-over-time
#19
Giulia Zumbo, Sharon V Barton, Douglas Thompson, Min Sun, Amna Abdel-Gadir, Thomas A Treibel, Daniel Knight, Ana Martinez-Naharro, Lane Thirusha, Julian D Gillmore, James C Moon, Philip N Hawkins, Marianna Fontana
BACKGROUND: Extracellular volume (ECV) by T1 mapping requires the contrast agent distribution to be at equilibrium. This can be achieved either definitively with a primed contrast infusion (infusion ECV), or sufficiently with a delay postbolus (bolus-only ECV). For large ECV, the bolus-only approach measures higher than the infusion ECV, causing some uncertainty in diseases such as amyloidosis. PURPOSE: To characterize the relationship between the bolus-only and current gold-standard infusion ECV in patients with amyloidosis...
November 21, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29159819/focal-nodular-hyperplasia-of-the-liver-contrast-enhanced-ultrasonographic-features-with-sonazoid
#20
Jongmee Lee, Woo Kyoung Jeong, Hyo K Lim, Ah Young Kim
OBJECTIVES: To investigate ultrasonographic features of focal nodular hyperplasia of the liver with contrast-enhanced ultrasonography (CEUS) using Sonazoid (perflubutane; GE Healthcare, Oslo, Norway). METHODS: Thirty-one patients with 31 focal nodular hyperplasia nodules who underwent CEUS using Sonazoid between July 2012 and February 2015 were included in this study. After the microbubble contrast agent was injected, intermittent CEUS images were obtained during the following 4 phases: arterial (10-40 seconds), portal venous (60-90 seconds), delayed (3 minutes), and Kupffer (>10 minutes)...
November 21, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
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