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https://www.readbyqxmd.com/read/28449479/early-results-of-the-sorin-%C3%A2-perceval-s-sutureless-valve-systematic-review-and-meta-analysis
#1
Karan Sian, Sheila Li, Daneish Selvakumar, Ross Mejia
BACKGROUND: Minimally invasive aortic valve replacement (MAVR) has demonstrated a benefit with respect to increased patient satisfaction due to minimised pain and earlier recovery. Sutureless valves may benefit MAVR and conventional aortic valve replacement (AVR) by reducing operative times and blood transfusion requirements. The Perceval valve (Sorin, Salluggia, Italy) is a self-expanding prosthesis made from bovine pericardium mounted in a nitinol stent, designed to simplify the implantation of an aortic valve...
March 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28449378/analysis-of-toldimfos-in-porcine-muscle-and-bovine-milk-using-liquid-chromatography-triple-quadrupole-mass-spectrometry
#2
Dan Zhang, Jin-A Park, A M Abd El-Aty, Seong-Kwan Kim, Sang-Hyun Cho, Weijia Zheng, Jeong-Min Choi, Jae-Han Shim, Byung-Joon Chang, Jin-Suk Kim, Ho-Chul Shin
An analytical method was developed for the detection of toldimfos sodium residues in porcine muscle and bovine milk using liquid chromatography-triple quadrupole tandem mass spectrometry (LC-MS/MS) analysis. The drug was extracted from muscle and milk using 10 mM ammonium formate in acetonitrile and then purified using n-hexane. The drug was well separated on a Luna C18 column using a mixture of 10 mM ammonium formate in ultrapure water (A) and acetonitrile (B) as the mobile phase. Good linearity was achieved over the tested concentration range (0...
April 27, 2017: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/28449095/role-of-cc-cytokines-in-spatial-arrangement-of-the-inner-cell-mass-of-the-bovine-embryo
#3
Verónica M Negrón-Pérez, Dorianmarie Vargas-Franco, Peter J Hansen
The process of spatial rearrangement of cells of the inner cell mass (ICM) that are destined to become hypoblast is not well understood. The observation that the chemokine CCL24 and several other genes involved in chemokine signaling are expressed more in the ICM than the trophectoderm of the bovine embryo resulted in the hypothesis that CCL24 participates in spatial organization of the ICM. Temporally, expression of CCL24 in the bovine embryo occurs coincident with blastocyst formation: transcript abundance was low until the late morula stage, peaked in the blastocyst at Day 7 of development and declined by Day 9...
April 25, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/28448851/accurate-3d-reconstruction-of-bony-surfaces-using-ultrasonic-synthetic-aperture-techniques-for-robotic-knee-arthroplasty
#4
William Kerr, Philip Rowe, Stephen Gareth Pierce
Robotically guided knee arthroplasty systems generally require an individualized, preoperative 3D model of the knee joint. This is typically measured using Computed Tomography (CT) which provides the required accuracy for preoperative surgical intervention planning. Ultrasound imaging presents an attractive alternative to CT, allowing for reductions in cost and the elimination of doses of ionizing radiation, whilst maintaining the accuracy of the 3D model reconstruction of the joint. Traditional phased array ultrasound imaging methods, however, are susceptible to poor resolution and signal to noise ratios (SNR)...
April 19, 2017: Computerized Medical Imaging and Graphics: the Official Journal of the Computerized Medical Imaging Society
https://www.readbyqxmd.com/read/28448585/impact-of-temperature-and-soil-type-on-mycobacterium-bovis-survival-in-the-environment
#5
Elodie Barbier, Murielle Rochelet, Laurent Gal, Maria Laura Boschiroli, Alain Hartmann
Mycobacterium bovis, the causative agent of the bovine tuberculosis (bTB), mainly affects cattle, its natural reservoir, but also a wide range of domestic and wild mammals. Besides direct transmission via contaminated aerosols, indirect transmission of the M. bovis between wildlife and livestock might occur by inhalation or ingestion of environmental substrates contaminated through infected animal shedding. We monitored the survival of M. bovis in two soil samples chosen for their contrasted physical and-chemical properties (i...
2017: PloS One
https://www.readbyqxmd.com/read/28448416/analysis-of-a-steerable-needle-for-fine-needle-aspiration-and-biopsy-efficiency-and-radiation-dose-compared-with-a-conventional-straight-needle
#6
Sandra Rutigliano, John A Abraham, Barry E Kenneally, Adam C Zoga, Mika Nevalainen, Johannes B Roedl
PURPOSE: Percutaneous computed tomography (CT)-guided needle biopsy has proven to be an efficacious method for sampling of many soft tissue lesions, especially deep-seated masses in the abdomen and pelvis. This study sought to test the potential for a novel steerable needle to improve localization and to reduce procedure duration and radiation dose compared with a conventional straight needle. MATERIAL AND METHODS: A fresh, raw meat sample (lean bovine flank) was imbedded with cylindrical radiopaque and radiolucent obstacles designed to simulate vessels (radiolucent objects) and bones (radiopaque objects) on CT...
April 26, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28448024/synthesis-of-hydrogels-with-antifouling-properties-as-membranes-for-water-purification
#7
Thien N Tran, Sankara N Ramanan, Haiqing Lin
Hydrogels have been widely utilized to enhance the surface hydrophilicity of membranes for water purification, increasing the antifouling properties and thus achieving stable water permeability through membranes over time. Here, we report a facile method to prepare hydrogels based on zwitterions for membrane applications. Freestanding films can be prepared from sulfobetaine methacrylate (SBMA) with a crosslinker of poly(ethylene glycol) diacrylate (PEGDA) via photopolymerization. The hydrogels can also be prepared by impregnation into hydrophobic porous supports to enhance the mechanical strength...
April 7, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28447892/intracellular-localization-of-proteins-to-specific-cellular-areas-by-nanocapsule-mediated-delivery
#8
Huabin Wang, Ligang Chen, Xianchao Sun, Ailing Fu
Nanocapsules are promising carriers with great potential for intracellular protein transport. Although many studies have intended to improve cell uptake efficacy, there is an increasing interest in understanding of subcellular distribution of cargoes inside cells, which is essential for purposeful delivery of biomolecules into specific sites within cells. Herein, we interrogate the intracellular localization of exogenous proteins, including fluorescein isothiocyanate (FITC)-labeled bovine serum albumin (BSA) and green fluorescent protein (GFP), mediated by specially designed nanocapsules...
April 27, 2017: Journal of Drug Targeting
https://www.readbyqxmd.com/read/28447727/advanced-glycation-end-products%C3%A2-induced-mitochondrial-energy-metabolism-dysfunction-alters-proliferation-of-human-umbilical-vein-endothelial-cells
#9
Yuan Li, Ye Chang, Ning Ye, Yintao Chen, Naijin Zhang, Yingxian Sun
Advanced glycation end products (AGEs) restrain the proliferation of endothelial cells, which is an important determinant of diabetic vasculopathy. Mitochondrial biogenesis serves an essential role in cellular adaptation and repair. The current study aimed to investigate alterations in mitochondrial energy metabolism in human umbilical vein endothelial cells (HUVECs) and the latent mechanism regulated by AGEs. The proliferation of cultured HUVECs stimulated with AGEs was detected using an MTT assay and a real‑time cell analyzer (RTCA)...
March 10, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28447604/wearable-smart-sensor-systems-integrated-on-soft-contact-lenses-for-wireless-ocular-diagnostics
#10
Joohee Kim, Minji Kim, Mi-Sun Lee, Kukjoo Kim, Sangyoon Ji, Yun-Tae Kim, Jihun Park, Kyungmin Na, Kwi-Hyun Bae, Hong Kyun Kim, Franklin Bien, Chang Young Lee, Jang-Ung Park
Wearable contact lenses which can monitor physiological parameters have attracted substantial interests due to the capability of direct detection of biomarkers contained in body fluids. However, previously reported contact lens sensors can only monitor a single analyte at a time. Furthermore, such ocular contact lenses generally obstruct the field of vision of the subject. Here, we developed a multifunctional contact lens sensor that alleviates some of these limitations since it was developed on an actual ocular contact lens...
April 27, 2017: Nature Communications
https://www.readbyqxmd.com/read/28447546/application-of-an-indicator-immobilized-gel-sheet-for-measuring-the-ph-surrounding-a-calcium-phosphate-based-biomaterial
#11
Taisuke Masuda, Hisataka Maruyama, Fumihito Arai, Takahisa Anada, Kaori Tsuchiya, Toshio Fukuda, Osamu Suzuki
The present study was designed to investigate the local microenvironment of octacalcium phosphate in a granule form upon biomolecules adsorption utilizing an indicator-immobilized-gel-sheet for measuring pH. We previously showed that octacalcium phosphate enhances bone regeneration during its progressive hydrolysis into hydroxyapatite if implanted in bone defects. The gel-sheet was made from a photocrosslinkable prepolymer solution, which can easily immobilize a pH indicator (bromothymol blue; BTB) in the hydrogel...
April 2017: Journal of Biomaterials Applications
https://www.readbyqxmd.com/read/28447390/high-non-esterified-fatty-acid-concentrations-promote-expression-and-secretion-of-fibroblast-growth-factor-21-in-calf-hepatocytes-cultured-in-vitro
#12
J G Wang, Y Z Guo, Y Z Kong, S Dai, B Y Zhao
Negative energy balance is considered as the pathological basis of energy metabolic disorders in periparturient dairy cows. Serum non-esterified fatty acids (NEFA) are one of the most important indicators of energy balance status. Fibroblast growth factor 21 (FGF21) has been identified as a hepatokine involved in regulation of metabolic adaptations, such as promoting hepatic lipid oxidation and ketogenesis, during energy deprivation. However, the direct effects of NEFA on FGF21 expression and secretion in bovine hepatocytes are not entirely clear...
April 26, 2017: Journal of Animal Physiology and Animal Nutrition
https://www.readbyqxmd.com/read/28447291/investigation-of-contact-characteristics-and-frictional-properties-of-natural-articular-cartilage-at-two-different-surface-configurations
#13
Shanhua Qian, Liyong Zhang, Zi Feng Ni, Chuanhui Huang, Dekun Zhang
Natural cartilage surfaces were macroscopically curved with multi-porous viscoelastic biologic materials with extremely high water, but whether curved surface configuration could play an important role on the contact and frictional properties of natural cartilages fails to be completely understood up to now. In this current study, cartilage samples came from the 18-24 month-old bovine femora. Contact characteristic and frictional properties at two cartilage configurations were investigated using the UMT-2 testing rig and the five-point sliding average method would be adopted to analyze these tested data...
June 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/28446245/mining-a-differential-sialotranscriptome-of-rhipicephalus-microplus-guides-antigen-discovery-to-formulate-a-vaccine-that-reduces-tick-infestations
#14
Sandra R Maruyama, Gustavo R Garcia, Felipe R Teixeira, Lucinda G Brandão, Jennifer M Anderson, José M C Ribeiro, Jesus G Valenzuela, Jana Horackova, Cecília J Veríssimo, Luciana M Katiki, Tamy M Banin, Amanda F Zangirolamo, Luiz G Gardinassi, Beatriz R Ferreira, Isabel K F de Miranda-Santos
BACKGROUND: Ticks cause massive damage to livestock and vaccines are one sustainable substitute for the acaricides currently heavily used to control infestations. To guide antigen discovery for a vaccine that targets the gamut of parasitic strategies mediated by tick saliva and enables immunological memory, we exploited a transcriptome constructed from salivary glands from all stages of Rhipicephalus microplus ticks feeding on genetically tick-resistant and susceptible bovines. RESULTS: Different levels of host anti-tick immunity affected gene expression in tick salivary glands; we thus selected four proteins encoded by genes weakly expressed in ticks attempting to feed on resistant hosts or otherwise abundantly expressed in ticks fed on susceptible hosts; these sialoproteins mediate four functions of parasitism deployed by male ticks and that do not induce antibodies in naturally infected, susceptible bovines...
April 26, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28446193/liver-morphometrics-and-metabolic-blood-profile-across-divergent-phenotypes-for-feed-efficiency-in-the-bovine
#15
Yuri Regis Montanholi, Livia Sadocco Haas, Kendall Carl Swanson, Brenda Lee Coomber, Shigeto Yamashiro, Stephen Paul Miller
BACKGROUND: Feed costs are a major expense in the production of beef cattle. Individual variation in the efficiency of feed utilization may be evident through feed efficiency-related phenotypes such as those related to major energetic sinks. Our objectives were to assess the relationships between feed efficiency with liver morphometry and metabolic blood profile in feedlot beef cattle. METHODS: Two populations (A = 112 and B = 45) of steers were tested for feed efficiency...
April 26, 2017: Acta Veterinaria Scandinavica
https://www.readbyqxmd.com/read/28446015/realistic-electric-field-mapping-of-anisotropic-muscle-during-electrical-stimulation-using-a-combination-of-water-diffusion-tensor-and-electrical-conductivity
#16
Bup Kyung Choi, Tong In Oh, Saurav Zk Sajib, Jin Woong Kim, Hyung Joong Kim, Oh In Kwon, Eung Je Woo
PURPOSE: To realistically map the electric fields of biological tissues using a diffusion tensor magnetic resonance electrical impedance tomography (DT-MREIT) method to estimate tissue response during electrical stimulation. METHODS: Imaging experiments were performed using chunks of bovine muscle. Two silver wire electrodes were positioned inside the muscle tissue for electrical stimulation. Electric pulses were applied with a 100-V amplitude and 100-μs width using a voltage stimulator...
April 2017: International Neurourology Journal
https://www.readbyqxmd.com/read/28445838/addition-of-insulin-like-growth-factor-i-to-the-maturation-medium-of-bovine-oocytes-subjected-to-heat-shock-effects-on-the-production-of-reactive-oxygen-species-mitochondrial-activity-and-oocyte-competence
#17
I J Ascari, N G Alves, J Jasmin, R R Lima, C C R Quintão, G Oberlender, E A Moraes, L S A Camargo
This study was performed to investigate the effects of insulin-like growth factor-I (IGF-I) addition to in vitro maturation (IVM) medium on apoptosis, mitochondrial membrane potential, ROS production, and developmental competence of bovine oocytes subjected to heat shock. Two temperatures (conventional: 24 h at 38.5°C, or heat shock: 12 h at 41°C followed by 12 h at 38.5°C) and 3 IGF-I concentrations (0, 25, and 100 ng/mL) were tested during IVM. The oocytes were then fertilized in vitro, and the presumptive zygotes were cultured until reaching the blastocyst stage...
March 25, 2017: Domestic Animal Endocrinology
https://www.readbyqxmd.com/read/28445752/refolding-of-sds-unfolded-proteins-by-nonionic-surfactants
#18
Jørn Døvling Kaspersen, Anne Søndergaard, Daniel Jhaf Madsen, Daniel E Otzen, Jan Skov Pedersen
The strong and usually denaturing interaction between anionic surfactants (AS) and proteins/enzymes has both benefits and drawbacks: for example, it is put to good use in electrophoretic mass determinations but limits enzyme efficiency in detergent formulations. Therefore, studies of the interactions between proteins and AS as well as nonionic surfactants (NIS) are of both basic and applied relevance. The AS sodium dodecyl sulfate (SDS) denatures and unfolds globular proteins under most conditions. In contrast, NIS such as octaethylene glycol monododecyl ether (C12E8) and dodecyl maltoside (DDM) protect bovine serum albumin (BSA) from unfolding in SDS...
April 25, 2017: Biophysical Journal
https://www.readbyqxmd.com/read/28445479/in-vitro-and-in-vivo-antivirus-activity-of-an-anti-programmed-death-ligand-1-pd-l1-rat-bovine-chimeric-antibody-against-bovine-leukemia-virus-infection
#19
Asami Nishimori, Satoru Konnai, Tomohiro Okagawa, Naoya Maekawa, Ryoyo Ikebuchi, Shinya Goto, Yamato Sajiki, Yasuhiko Suzuki, Junko Kohara, Satoshi Ogasawara, Yukinari Kato, Shiro Murata, Kazuhiko Ohashi
Programmed death-1 (PD-1), an immunoinhibitory receptor on T cells, is known to be involved in immune evasion through its binding to PD-ligand 1 (PD-L1) in many chronic diseases. We previously found that PD-L1 expression was upregulated in cattle infected with bovine leukemia virus (BLV) and that an antibody that blocked the PD-1/PD-L1 interaction reactivated T-cell function in vitro. Therefore, this study assessed its antivirus activities in vivo. First, we inoculated the anti-bovine PD-L1 rat monoclonal antibody 4G12 into a BLV-infected cow...
2017: PloS One
https://www.readbyqxmd.com/read/28444869/assessment-of-the-usage-of-biodegradable-polymeric-matrix-in-vaginal-devices-to-sustain-progesterone-release-in-cows
#20
José Rodrigo Valim Pimentel, Milton Maturana Filho, Lucio Cardozo-Filho, José Augusto M Agnelli, Jefter Nascimento, Ed Hoffmann Madureira
The usage of timed artificial insemination (TAI) at a low cost leading to better reproductive rates has been the aim of several research groups in the field. Usually during TAI protocols, sustained progesterone (P4 ) release devices are employed. Most devices are constituted of a nylon skeleton covered with a silicon layer with P4 . A device based on biopolymers was developed in order to reduce costs and decrease its environmental impact. In this study, we compared the kinetics of sustained progesterone release among devices manufactured with a polymeric blend made of polyhydroxybutyrate-valerate (PHBV) and poly-ε-caprolactone (PCL) (DISP) which were compared with DIB® (Internal Bovine Device) used as the control...
April 25, 2017: Animal Science Journal, Nihon Chikusan Gakkaihō
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