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https://www.readbyqxmd.com/read/28922117/magnetic-resonance-mediated-radiofrequency-ablation
#1
Yik-Kiong Hue, Alexander R Guimaraes, Ouri Cohen, Erez Nevo, Abraham Roth, Jerome L Ackerman, Jerome L Ackerman
OBJECTIVE: To introduce magnetic resonance mediated radiofrequency ablation (MR-RFA), in which the MRI scanner uniquely serves both diagnostic and therapeutic roles. In MR-RFA scanner-induced RF heating is channeled to the ablation site via a Larmor frequency RF pickup device and needle system, and controlled via the pulse sequence. METHODS: MR-RFA was evaluated with simulation of electric and magnetic fields to predict the increase in local specific-absorption-rate (SAR)...
September 18, 2017: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28898966/employment-characteristics-of-a-complex-adult-congenital-heart-disease-cohort
#2
L Pickup, T Gaffey, P Clift, S Bowater, S Thorne, L Hudsmith
Background: Due to advances in surgical techniques and subsequent management, there have been remarkable improvements in the survival of patients with congenital heart disease. In particular, larger numbers of patients with complex disease are now living into adulthood and are entering the workforce. Aims: To establish the types of employment complex adult congenital heart disease (ACHD) patients are engaged in, based on the largest cohort of patients with a single-ventricle circulation in the UK...
August 1, 2017: Occupational Medicine
https://www.readbyqxmd.com/read/28877984/%C3%AE-5%C3%AE-1-integrinpromotes-tension-dependent-mammary-epithelial-cell-invasion-by-engaging-the-fibronectin-synergy-site
#3
Y A Miroshnikova, G I Rozenberg, L Cassereau, M Pickup, J K Mouw, G Ou, K L Templeman, I Elloumi-Hannachi, K Gooch, A L Sarang-Sieminski, A J García, V M Weaver
Tumors are fibrotic and characterized by abundant, remodeled and cross-linked collagen that stiffens the extracellular matrix stroma. The stiffened collagenous stroma fosters malignant transformation of the tissue by increasing tumor cell tension to promote focal adhesion formation and potentiate growth factor receptor signaling through ERK and PI3 kinase. Importantly, collagen cross-linking requires fibronectin. Fibrotic tumors contain abundant fibronectin and tumor cells frequently up regulate the fibronectin receptor α5β1 integrin...
September 6, 2017: Molecular Biology of the Cell
https://www.readbyqxmd.com/read/28863713/scanning-squid-sampler-with-40-ps-time-resolution
#4
Zheng Cui, John R Kirtley, Yihua Wang, Philip A Kratz, Aaron J Rosenberg, Christopher A Watson, Gerald W Gibson, Mark B Ketchen, Kathryn A Moler
Scanning Superconducting QUantum Interference Device (SQUID) microscopy provides valuable information about magnetic properties of materials and devices. The magnetic flux response of the SQUID is often linearized with a flux-locked feedback loop, which limits the response time to microseconds or longer. In this work, we present the design, fabrication, and characterization of a novel scanning SQUID sampler with a 40-ps time resolution and linearized response to periodically triggered signals. Other design features include a micron-scale pickup loop for the detection of local magnetic flux, a field coil to apply a local magnetic field to the sample, and a modulation coil to operate the SQUID sampler in a flux-locked loop to linearize the flux response...
August 2017: Review of Scientific Instruments
https://www.readbyqxmd.com/read/28840925/electron-ionization-of-helium-droplets-containing-c60-and-alcohol-clusters
#5
M Goulart, F Zappa, A M Ellis, P Bartl, S Ralser, P Scheier
We report a mass spectrometric investigation of (C60)n clusters mixed with either methanol or ethanol clusters inside helium nanodroplets. The abundance of ion products produced by electron ionization shows marked differences compared with pure methanol/ethanol clusters without C60 [M. Goulart, P. Bartl, A. Mauracher, F. Zappa, A. M. Ellis and P. Scheier, Phys. Chem. Chem. Phys., 2013, 15, 3577], where clusters containing in excess of a hundred alcohol monomers were observed. In contrast, under identical conditions concerning He droplet size and alcohol pickup pressure, only a small number of alcohol molecules become attached to the fullerene ions...
September 13, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28831696/brca1-mutation-carriers-have-a-lower-number-of-mature-oocytes-after-ovarian-stimulation-for-ivf-pgd
#6
I A P Derks-Smeets, T C van Tilborg, A van Montfoort, L Smits, H L Torrance, M Meijer-Hoogeveen, F Broekmans, J C F M Dreesen, A D C Paulussen, V C G Tjan-Heijnen, I Homminga, M M J van den Berg, M G E M Ausems, M de Rycke, C E M de Die-Smulders, W Verpoest, R van Golde
PURPOSE: The aim of this study was to determine whether BRCA1/2 mutation carriers produce fewer mature oocytes after ovarian stimulation for in vitro fertilization (IVF) with preimplantation genetic diagnosis (PGD), in comparison to a PGD control group. METHODS: A retrospective, international, multicenter cohort study was performed on data of first PGD cycles performed between January 2006 and September 2015. Data were extracted from medical files. The study was performed in one PGD center and three affiliated IVF centers in the Netherlands and one PGD center in Belgium...
August 22, 2017: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/28820504/diabetes-insulin-pumps-after-injections-and-cgm-in-t1dm
#7
John C Pickup
No abstract text is available yet for this article.
October 2017: Nature Reviews. Endocrinology
https://www.readbyqxmd.com/read/28814388/the-impact-of-poxvirus-vector-priming-protein-co-administration-and-vaccine-intervals-on-hiv-gp120-vaccine-elicited-antibody-magnitude-and-function-in-infant-macaques
#8
Bonnie Phillips, Genevieve G Fouda, Josh Eudailey, Justin Pollara, Alan D Curtis, Erika Kunz, Maria Dennis, Xiaoying Shen, Camden Bay, Michael Hudgens, David Pickup, S Munir Alam, Amir Ardeshir, Pamela A Kozlowski, Koen K A Van Rompay, Guido Ferrari, M Anthony Moody, Sallie Permar, Kristina De Paris
Despite success in reducing vertical HIV transmission by maternal antiretroviral therapy, several obstacles limit its efficacy during breastfeeding, and breast-milk transmission is now the dominant mode of mother-to-child transmission (MTCT) of HIV in infants. Thus, a pediatric vaccine is needed to eradicate oral HIV infections in newborns and infants. Utilizing the infant rhesus macaque model, we compared 3 different vaccine regimens: (i) HIV Env protein only; (ii) a poxvirus vector (MVA)-HIV Env prime/HIV Env protein boost, and (iii) co-administration of HIV Env protein and MVA-HIV Env at all time points...
August 16, 2017: Clinical and Vaccine Immunology: CVI
https://www.readbyqxmd.com/read/28813567/comparison-of-view-based-and-reconstruction-based-models-of-human-navigational-strategy
#9
COMPARATIVE STUDY
Luise Gootjes-Dreesbach, Lyndsey C Pickup, Andrew W Fitzgibbon, Andrew Glennerster
There is good evidence that simple animals, such as bees, use view-based strategies to return to a familiar location, whereas humans might use a 3-D reconstruction to achieve the same goal. Assuming some noise in the storage and retrieval process, these two types of strategy give rise to different patterns of predicted errors in homing. We describe an experiment that can help distinguish between these models. Participants wore a head-mounted display to carry out a homing task in immersive virtual reality. They viewed three long, thin, vertical poles and had to remember where they were in relation to the poles before being transported (virtually) to a new location in the scene from where they had to walk back to the original location...
August 1, 2017: Journal of Vision
https://www.readbyqxmd.com/read/28802550/mr-coagulation-a-novel-minimally-invasive-approach-to-aneurysm-repair
#10
Ouri Cohen, Ming Zhao, Erez Nevo, Jerome L Ackerman
PURPOSE: To demonstrate a proof of concept of magnetic resonance (MR) coagulation, in which MR imaging scanner-induced radiofrequency (RF) heating at the end of an intracatheter long wire heats and coagulates a protein solution to effect a vascular repair by embolization. MATERIALS AND METHODS: MR coagulation was simulated by finite-element modeling of electromagnetic fields and specific absorption rate (SAR) in a phantom. A glass phantom consisting of a spherical cavity joined to the side of a tube was incorporated into a flow system to simulate an aneurysm and flowing blood with velocities of 0-1...
August 9, 2017: Journal of Vascular and Interventional Radiology: JVIR
https://www.readbyqxmd.com/read/28777263/a-stepped-wedge-cluster-randomized-controlled-trial-to-promote-option-b-retention-in-central-mozambique
#11
James T Pfeiffer, Manuel Napúa, Bradley H Wagenaar, Falume Chale, Roxanne Hoek, Mark Micek, Joao Manuel, Cathy Michel, Jessica Greenberg Cowan, James F Cowan, Sarah Gimbel, Kenneth Sherr, Stephen Gloyd, Rachel R Chapman
BACKGROUND: This randomized trial studied performance of Option B+ in Mozambique, and evaluated an enhanced retention package in public clinics. SETTING: The study was conducted at 6 clinics in Manica and Sofala Provinces in central Mozambique. METHODS: 761 pregnant women tested HIV+, immediately initiated ART, and were followed to track retention at 6 clinics from May 2014 - May 2015. Clinics were randomly allocated within a stepped-wedge fashion to intervention and control periods...
July 31, 2017: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/28776084/the-association-of-depressive-symptoms-and-diabetes-distress-with-glycaemic-control-and-diabetes-complications-over-2%C3%A2-years-in-newly-diagnosed-type-2-diabetes-a-prospective-cohort-study
#12
Khalida Ismail, Calum D Moulton, Kirsty Winkley, John C Pickup, Stephen M Thomas, Roy A Sherwood, Daniel Stahl, Stephanie A Amiel
AIMS/HYPOTHESIS: We examined the associations between depressive symptoms and diabetes distress with glycaemic control and diabetes complications over 2 years, after diagnosis of type 2 diabetes. METHODS: In a multi-ethnic, primary care cohort (n = 1735) of adults, all with recent (<6 months) diagnosis of type 2 diabetes, we measured the associations between depressive symptoms (Patient Health Questionnaire-9 [PHQ-9] score ≥10) and diabetes distress (Problem Areas in Diabetes [PAID] score ≥40), with change in 2 year HbA1c as the primary outcome and with incident rates of diabetes complications as secondary outcomes...
August 3, 2017: Diabetologia
https://www.readbyqxmd.com/read/28775207/development-of-aggressive-pancreatic-ductal-adenocarcinomas-depends-on-granulocyte-colony-stimulating-factor-secretion-in-carcinoma-cells
#13
Michael W Pickup, Philip Owens, Agnieszka E Gorska, Anna Chytil, Fei Ye, Chanjuan Shi, Valerie M Weaver, Raghu Kalluri, Harold L Moses, Sergey V Novitskiy
The survival rate for pancreatic ductal adenocarcinoma (PDAC) remains low. More therapeutic options to treat this disease are needed, for the current standard of care is ineffective. Using an animal model of aggressive PDAC (Kras/p48(TGFβRIIKO)), we discovered an effect of TGFβ signaling in regulation of G-CSF secretion in pancreatic epithelium. Elevated concentrations of G-CSF in PDAC promoted differentiation of Ly6G(+) cells from progenitors, stimulated IL10 secretion from myeloid cells, and decreased T-cell proliferation via upregulation of Arg, iNOS, VEGF, IL6, and IL1b from CD11b(+) cells...
September 2017: Cancer Immunology Research
https://www.readbyqxmd.com/read/28774975/genome-sequence-of-human-papillomavirus-type-20-strain-hpv-20-lancaster-2015
#14
Kate V Atkinson, Lisa A Bishop, Glenn Rhodes, Nicolas Salez, Neil R McEwan, Matthew J Hegarty, Julie Robey, Nicola Harding, Simon Wetherell, Robert M Lauder, Roger W Pickup, Mark Wilkinson, Derek Gatherer
The genome sequence of human papillomavirus type 20 (HPV-20; family Papillomaviridae, genus Betapapillomavirus, species Betapapillomavirus 1, type 20) was assembled by deep sequencing from nasopharyngeal swabs. The assembled genome is 0.37% divergent over its full length from the single complete genome of HPV-20 in GenBank (U31778). We named the strain HPV-20/Lancaster/2015.
August 3, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28755536/using-fixed-parameter-and-random-parameter-ordered-regression-models-to-identify-significant-factors-that-affect-the-severity-of-drivers-injuries-in-vehicle-train-collisions
#15
Essam Dabbour, Said Easa, Murtaza Haider
This study attempts to identify significant factors that affect the severity of drivers' injuries when colliding with trains at railroad-grade crossings by analyzing the individual-specific heterogeneity related to those factors over a period of 15 years. Both fixed-parameter and random-parameter ordered regression models were used to analyze records of all vehicle-train collisions that occurred in the United States from January 1, 2001 to December 31, 2015. For fixed-parameter ordered models, both probit and negative log-log link functions were used...
July 26, 2017: Accident; Analysis and Prevention
https://www.readbyqxmd.com/read/28750299/prolonged-activation-of-the-coagulation-system-during-in-vitro-fertilization-cycles
#16
Yoni Cohen, Togas Tulandi, Benny Almog, Eyal Zohav, Varda Deutsch, Ariel Many, Ami Amit, Aviad Cohen
OBJECTIVE: To investigate coagulation system changes during an in-vitro fertilization (IVF) cycle using Thromboelastogram (TEG) that enables analysis of the elastic properties of whole blood samples and provides a global assessment of the hemostatic function. STUDY DESIGN: A prospective study. TEG indices were evaluated in 23 women who underwent controlled ovarian stimulation for IVF at four points in time: 1. At the beginning of the cycle (corresponding to the lowest levels of E2), 2...
July 17, 2017: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/28744919/differential-expression-of-insulin-like-growth-factor-family-members-in-immature-cumulus-oocyte-complexes-from-dairy-cows-with-different-genotypes
#17
A C Lopes, M P Palhão, Cac Fernandes, M J Sudano, Acs Castilho, E S Caixeta
It has been evident the improvement of in vitro embryo production (IVEP) in dairy cows. Nevertheless, it is known that differences in the number and quality of oocytes between taurine and zebu females impact the efficiency and economic viability of IVEP. As the insulin-like growth factor (IGF) system is related to follicular and oocyte development, we aimed to quantify mRNA abundance of IGF system members and pregnancy-associated plasma protein-A (PAPPA) in the cumulus-oocyte complexes (COCs) of Gir, 1/2 Holstein × 1/2 Gir and Holstein cows...
July 25, 2017: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/28744698/association-of-basal-serum-androgen-levels-with-ovarian-response-and-icsi-cycle-outcome
#18
C Abide Yayla, E Ozkaya, S Kayatas Eser, I Sanverdi, B Devranoglu, T Kutlu
BACKGROUND: The purpose of this study was to assess the predictive value of basal serum testosterone (T) and dehydroepiandrosterone sulfate (DHEAS) levels during follicular phase for ovarian response and outcome in intracytoplasmic sperm injection (ICSI) cycles of women with diminished ovarian reserve. METHODS: We prospectively gathered data of basal serum androgen levels and ICSI cycle characteristics of 120 women with diminished ovarian reserve. Association of basal serum T and DHEAS levels with ovarian response was analyzed...
July 25, 2017: Irish Journal of Medical Science
https://www.readbyqxmd.com/read/28735836/importance-of-deformable-image-registration-and-biological-dose-summation-in-planning-of-radiotherapy-retreatments
#19
Eeva Boman, Mika Kapanen, Lyndsey Pickup, Sirpa-Liisa Lahtela
The purpose of this study is to evaluate the effect of nonrigid and fractionation-corrected dose summation on total doses in radiotherapy and to demonstrate the benefits of such dose summation on clinical decision-making for planning of retreatments. Dose summation of organs at risk (OARs) was investigated for 3 clinical cases with need of retreatment to the same site: head and neck, brain, and mediastinum. Three different summation methods over old and new radiotherapy treatment plans are presented and compared: (1) rigid raw sum with rigid registration of the planning images and direct dose summing; (2) deformable raw sum with deformable image registration and direct dose summing; and (3) deformable biological sum with deformable registration and takes into account the dose per fraction in biological manner in certain critical organs...
July 20, 2017: Medical Dosimetry: Official Journal of the American Association of Medical Dosimetrists
https://www.readbyqxmd.com/read/28712801/the-effect-of-pelvic-tilt-and-femoral-head-size-on-hip-range-of-motion-to-impingement
#20
Thomas F McCarthy, Jim Nevelos, Randa K Elmallah, Morad Chughtai, Anton Khlopas, Vincent Alipit, Timothy C Wagner, Michael A Mont
BACKGROUND: About 50%-70% of dislocators have cups placed within so-called "safe zones." It has been postulated that factors such as femoral head size and pelvic tilt, obliquity, or rotation may influence postoperative stability. Therefore, we assessed varying degrees of pelvic tilt and head sizes on the range of motion (ROM) to impingement. METHODS: A hip simulator was used to import models of 10 subjects who performed object pickup, squatting, and low-chair rising...
June 15, 2017: Journal of Arthroplasty
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