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Ivan Yu Chernyshov, Philip V Toukach
Motivation: Glycans and glycoconjugates are usually recorded in dedicated databases in residue-based notations. Only a few of them can be converted into chemical (atom-based) formats highly demanded in conformational and biochemical studies. In this work, we present a tool for translation from a residue-based glycan notation to SMILES. Results: The REStLESS algorithm for translation from the CSDB Linear notation to SMILES was developed. REStLESS stands for ResiduEs as Smiles and LinkagEs as SmartS, where SMARTS reaction expressions are used to merge pre-encoded residues into a molecule...
March 14, 2018: Bioinformatics
Rada M Savic, Prasanna Jagannathan, Richard Kajubi, Liusheng Huang, Nan Zhang, Moses Were, Abel Kakuru, Mary K Muhindo, Norah Mwebaza, Erika Wallender, Tamara D Clark, Bishop Opira, Moses Kamya, Diane V Havlir, Philip J Rosenthal, Grant Dorsey, Francesca T Aweeka
Background: Dihydroartemsinin-piperaquine is highly efficacious as intermittent preventive therapy for malaria during pregnancy (IPTp). Determining associations between piperaquine exposure, malaria risk, and adverse birth outcomes informs optimal dosing strategies. Methods: HIV-uninfected pregnant women were enrolled in a placebo-controlled trial of IPTp at 12-20 weeks gestation and randomized to: sulfadoxine-pyrimethamine every 8 weeks (n=106), dihydroartemsinin-piperaquine every 8 weeks (n=94), or dihydroartemsinin-piperaquine every 4 weeks (n=100) during pregnancy...
March 14, 2018: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
Cheng Jin, Jianjiang Feng, Lei Wang, Heng Yu, Jiang Liu, Jiwen Lu, Jie Zhou
In this paper, we present an approach for left atrial appendage (LAA) multi-phase fast segmentation and quantitative assisted diagnosis of atrial fibrillation (AF) based on 4D-CT data. We take full advantage of the temporal dimension information to segment the living, flailed LAA based on a parametric max-flow method and graph-cut approach to build 3-D model of each phase. To assist the diagnosis of AF, we calculate the volumes of 3-D models, and then generate a "volume-phase" curve to calculate the important dynamic metrics: ejection fraction, filling flux, and emptying flux of the LAA's blood by volume...
March 9, 2018: Computers in Biology and Medicine
Souheil El-Chemaly, Kevin J O'Brien, Steven D Nathan, Gerald L Weinhouse, Hilary J Goldberg, Jean M Connors, Ye Cui, Todd L Astor, Philip C Camp, Ivan O Rosas, Merte Lemma, Vladislav Speransky, Melissa A Merideth, William A Gahl, Bernadette R Gochuico
Pulmonary fibrosis is a progressive, fatal manifestation of Hermansky-Pudlak syndrome (HPS). Some patients with advanced HPS pulmonary fibrosis undergo lung transplantation despite their disease-associated bleeding tendency; others die while awaiting donor organs. The objective of this study is to determine the clinical management and outcomes of a cohort with advanced HPS pulmonary fibrosis who were evaluated for lung transplantation. Six patients with HPS-1 pulmonary fibrosis were evaluated at the National Institutes of Health Clinical Center and one of two regional lung transplant centers...
2018: PloS One
Bastian Ramms, Philip L S M Gordts
PURPOSE OF REVIEW: Apolipoprotein (apo) C-III is a key player in triglyceride-rich lipoprotein metabolism and strongly associated with elevated plasma triglyceride levels. Several new studies added important insights on apoC-III and its physiological function confirming its promise as a valid therapeutic target. RECENT FINDINGS: APOC3 is expressed in liver and intestine and regulates triglyceride-rich lipoprotein (TRL) catabolism and anabolism. The transcriptional regulation in both organs requires different regulatory elements...
March 15, 2018: Current Opinion in Lipidology
Robert M B Dyer, Philip L Hahn, Michael K Hilinski
The first examples of nonenzymatic N-oxidation of heteroarenes in the presence of amines are reported. Pyridine, quinoline, and isoquinoline N-oxides are selectively formed in the presence of more reactive aliphatic and alicyclic amines by use of an in situ protonation strategy and an iminium salt organocatalyst. Application to late-stage functionalization that mimics phase 1 metabolism of small-molecule drugs is also demonstrated.
March 16, 2018: Organic Letters
Luis C Ascanio, Raghav Gupta, Nimer Adeeb, Justin M Moore, Christoph J Griessenauer, Julie Mayeku, Yaw Tachie-Baffour, Ranjit Thomas, Abdulrahman Y Alturki, Philip G R Schmalz, Christopher S Ogilvy, Ajith J Thomas
OBJECTIVE Currently, there is no established standard regarding the ideal number of external ventricular drain (EVD) clamp trials performed before ventriculoperitoneal (VP) shunt insertion following nontraumatic subarachnoid hemorrhage (SAH). In this study, the authors aimed to evaluate this relationship. METHODS A retrospective review of all patients presenting with SAH between July 2007 and December 2016 was performed. Patients with SAH who had received an EVD within the first 24 hours of hospital admission and had undergone at least 1 clamp trial prior to EVD removal were eligible for inclusion in the study...
March 16, 2018: Journal of Neurosurgery
Sarah R Horn, Leslie E Roos, Kathryn G Beauchamp, Jessica E Flannery, Philip A Fisher
Prior research has identified the role of childhood maltreatment in externalizing problems and executive function (EF) deficits, but minimal work has been done to characterize the effects of co-occurring maltreatment types, defined as polyvictimization. Here, we sought to characterize the association between polyvictimization and externalizing problems in a sample of foster care children aged 3-4 years (N = 84) and examine how EF may mediate or moderate that relationship. A moderation model was supported in that only polyvictimized children with EF scores 1...
May 2018: Journal of Trauma & Dissociation
Maj Hansen, Philip Hyland, Cherie Armour, Tonny E Andersen
Numerous studies investigating dissociative posttraumatic stress disorder (D-PTSD) have emerged. However, there is a lack of studies investigating D-PTSD following a wider range of traumatic exposure. Thus, the present study investigates D-PTSD using latent class analysis (LCA) in sub-acute patients of whiplash and associated risk factors. The results of LCA showed a three-class solution primarily distributed according to posttraumatic stress disorder (PTSD) symptom severity and thus no indication of D-PTSD...
March 16, 2018: Journal of Trauma & Dissociation
Philip Gc Chan, Gerard S Goh
PURPOSE: The AngioJet Hemolytic Thrombectomy Device "AngioJet" (Boston Scientific, Malborough, MA, USA) is a rheolytic thrombectomy device that can be used in the treatment of hemodialysis arteriovenous fistula and graft thrombosis. We aim to appraise the current evidence on AngioJet thrombectomy in hemodialysis vascular access thrombosis, and to determine its safety, including complications and efficacy. MATERIALS AND METHODS: An electronic literature search was performed on the MEDLINE and Embase databases...
March 1, 2018: Journal of Vascular Access
Rishibha Sachdev, Karin Kappes-Horn, Lydia Paulsen, Yvonne Duernberger, Catharina Pleschka, Philip Denner, Bishwajit Kundu, Jens Reimann, Ina Vorberg
Sporadic inclusion body myositis (sIBM) is the most prevalent acquired muscle disorder in the elderly with no defined etiology or effective therapy. Endoplasmic reticulum stress and deposition of myostatin, a secreted negative regulator of muscle growth, have been implicated in disease pathology. The myostatin signaling pathway has emerged as a major target for symptomatic treatment of muscle atrophy. Here, we systematically analyzed the maturation and secretion of myostatin precursor MstnPP and its metabolites in a human muscle cell line...
March 15, 2018: Molecular Neurobiology
Haiying Rao, Yuxiang Bai, Qingshu Li, Baimei Zhuang, Yu Yuan, Yamin Liu, Wei Peng, Philip N Baker, Chao Tong, Xin Luo, Hongbo Qi
Preeclampsia (PE) is characterized by abnormal placentation in the early stages of pregnancy. Adequate migration and invasion of trophoblasts into the uterine wall and spiral arteries to form a functional maternal-fetal interface are pivotal for normal placentation, but the exact mechanism remains unclear. Growing evidence has revealed that special AT-rich sequence-binding protein 1 (SATB1) is a tumor promoter that participates in cancer cell migration and invasion. However, the expression and function of SATB1 in trophoblasts is unknown...
March 13, 2018: Biology of Reproduction
Joshu J Mountjoy, Jamie D Howarth, Alan R Orpin, Philip M Barnes, David A Bowden, Ashley A Rowden, Alexandre C G Schimel, Caroline Holden, Huw J Horgan, Scott D Nodder, Jason R Patton, Geoffroy Lamarche, Matthew Gerstenberger, Aaron Micallef, Arne Pallentin, Tim Kane
Although the global flux of sediment and carbon from land to the coastal ocean is well known, the volume of material that reaches the deep ocean-the ultimate sink-and the mechanisms by which it is transferred are poorly documented. Using a globally unique data set of repeat seafloor measurements and samples, we show that the moment magnitude ( M w ) 7.8 November 2016 Kaikōura earthquake (New Zealand) triggered widespread landslides in a submarine canyon, causing a powerful "canyon flushing" event and turbidity current that traveled >680 km along one of the world's longest deep-sea channels...
March 2018: Science Advances
Philip A Fontenot, Brian D Barnes, William P Parker, Hadley Wyre, Eugene K Lee, Jeffrey M Holzbeierlein
OBJECTIVES: To compare complication rates, perioperative outcomes, and survival after radical cystectomy (RC) in patients with prior abdominal and/or pelvic radiation therapy (RT) versus those without an RT history. METHODS: We retrospectively reviewed patients undergoing RC for urothelial carcinoma (UC) between January 2008 and January 2016. Patients were stratified by receipt of RT, and differences in complications (any, minor, and major) at 30 and 90 days, as well as, estimated blood loss, length of surgery, length of hospital stay, and pathologic stage were compared...
March 12, 2018: Urology
Philip J Landrigan
No abstract text is available yet for this article.
March 12, 2018: Lancet. Public Health
C-A Philip, G Dubernard
Endometriosis is difficult to diagnose clinically. Transvaginal sonography (TVS) is a procedure that is known to be operator-dependent, which mean that published evidences has to be balanced with the level of the sonographer that produced the data. The objective of this publication was to assess the performances of the sonography in the diagnosis of endometriosis in order to establish the French national recommendations. We searched the MEDLINE database for publication from January 2000 to September 2017 using keywords associated with endometriosis and sonography...
March 12, 2018: Gynecologie, Obstetrique, Fertilite & Senologie
Peter Nash, Philip J Mease, Iain B McInnes, Proton Rahman, Christopher T Ritchlin, Ricardo Blanco, Eva Dokoupilova, Mats Andersson, Radhika Kajekar, Shephard Mpofu, Luminita Pricop
BACKGROUND: The study aimed to assess 52-week efficacy and safety of secukinumab self-administration by autoinjector in patients with active psoriatic arthritis (PsA) in the FUTURE 3 study ( NCT01989468). METHODS: Patients (≥ 18 years of age; N = 414) with active PsA were randomized 1:1:1 to subcutaneous (s.c.) secukinumab 300 mg, 150 mg, or placebo at baseline, weeks 1, 2, 3, and 4, and every 4 weeks thereafter. Per clinical response, placebo-treated patients were re-randomized to s...
March 15, 2018: Arthritis Research & Therapy
Kednapa Thavorn, Howsikan Kugathasan, Darrell H S Tan, Nasheed Moqueet, Stefan D Baral, Becky Skidmore, Derek MacFadden, Anna Simkin, Sharmistha Mishra
BACKGROUND: Pre-exposure prophylaxis (PrEP) with antiretrovirals is an efficacious and effective intervention to decrease the risk of HIV (human immunodeficiency virus) acquisition. Yet drug and delivery costs prohibit access in many jurisdictions. In the absence of guidelines for the synthesis of economic evaluations, we developed a protocol for a systematic review of economic evaluation studies for PrEP by drawing on best practices in systematic reviews and the conduct and reporting of economic evaluations...
March 15, 2018: Systematic Reviews
Xuecheng Tao, Philip Shushkov, Thomas F Miller
We describe a path-integral approach for including nuclear quantum effects in non-adiabatic chemical dynamics simulations. For a general physical system with multiple electronic energy levels, a corresponding isomorphic Hamiltonian is introduced such that Boltzmann sampling of the isomorphic Hamiltonian with classical nuclear degrees of freedom yields the exact quantum Boltzmann distribution for the original physical system. In the limit of a single electronic energy level, the isomorphic Hamiltonian reduces to the familiar cases of either ring polymer molecular dynamics (RPMD) or centroid molecular dynamics Hamiltonians, depending on the implementation...
March 14, 2018: Journal of Chemical Physics
Shuai Zhang, Burkhard Militzer, Lorin X Benedict, François Soubiran, Philip A Sterne, Kevin P Driver
Carbon-hydrogen plasmas and hydrocarbon materials are of broad interest to laser shock experimentalists, high energy density physicists, and astrophysicists. Accurate equations of state (EOSs) of hydrocarbons are valuable for various studies from inertial confinement fusion to planetary science. By combining path integral Monte Carlo (PIMC) results at high temperatures and density functional theory molecular dynamics results at lower temperatures, we compute the EOSs for hydrocarbons from simulations performed at 1473 separate (ρ, T)-points distributed over a range of compositions...
March 14, 2018: Journal of Chemical Physics
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