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https://www.readbyqxmd.com/read/28905949/electronic-and-molecular-structure-relations-in-diiron-compounds-mimicking-the-fefe-hydrogenase-active-site-studied-by-x-ray-spectroscopy-and-quantum-chemistry
#1
Ramona Kositzki, Stefan Mebs, Nils Schuth, Nils Leidel, Lennart Schwartz, Michael Karnahl, Florian Wittkamp, Daniel Daunke, Andreas Grohmann, Ulf-Peter Apfel, Frédéric Gloaguen, Sascha Ott, Michael Haumann
Synthetic diiron compounds of the general formula Fe2(μ-S2R)(CO)n(L)6-n (R = alkyl or aromatic groups; L = CN(-) or phosphines) are versatile models for the active-site cofactor of hydrogen turnover in [FeFe]-hydrogenases. A series of 18 diiron compounds, containing mostly a dithiolate bridge and terminal ligands of increasing complexity, was characterized by X-ray absorption and emission spectroscopy in combination with density functional theory. Fe K-edge absorption and Kβ main-line emission spectra revealed the varying geometry and the low-spin state of the Fe(i) centers...
September 14, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28898639/ve-cadherin-phosphorylation-regulates-endothelial-fluid-shear-stress-responses-through-the-polarity-protein-lgn
#2
Daniel E Conway, Brian G Coon, Madhusudhan Budatha, Paul T Arsenovic, Fabrizio Orsenigo, Florian Wessel, Jiasheng Zhang, Zhenwu Zhuang, Elisabetta Dejana, Dietmar Vestweber, Martin A Schwartz
No abstract text is available yet for this article.
September 11, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28854673/peculiar-citric-acid-cycle-of-hydrothermal-vent-chemolithoautotroph-hydrogenovibrio-crunogenus-and-insights-into-carbon-metabolism-by-obligate-autotrophs
#3
Ishtiaque Quasem, Alexandra N Achille, Brittany A Caddick, Travis A Carter, Camille Daniels, Jennifer A Delaney, Vedad Delic, Kimberly A Denton, Martina C Duran, Marianne K Fatica, Christopher M Ference, Julie P Galkiewicz, Ana M Garcia, Jacqueline D Hendrick, Steven A Horton, Mey S Kun, Phoebe W Koch, Tien Min Lee, Christie R McCabe, Sean McHale, Lauren D McDaniel, Damian M Menning, Kristy J Menning, Hamed Mirzaei-Souderjani, Salina Mostajabian, David A Nicholson, Courtney K Nugent, Nicholas P Osman, Desiree I Pappas, Andrea M Rocha, Karyna Rosario, Haydn Rubelmann, Julie A Schwartz, Kent W Seeley, Christopher M Staley, Elizabeth M Wallace, Terianne M Wong, Brian L Zielinski, Thomas E Hanson, Kathleen M Scott
The genome sequence of the obligate chemolithoautotroph Hydrogenovibrio crunogenus paradoxically predicts a complete oxidative citric acid cycle (CAC). This prediction was tested by multiple approaches including whole cell carbon assimilation to verify obligate autotrophy, phylogenetic analysis of CAC enzyme sequences and enzyme assays. Hydrogenovibrio crunogenus did not assimilate any of the organic compounds provided (acetate, succinate, glucose, yeast extract, tryptone). Enzyme activities confirmed that its CAC is mostly uncoupled from the NADH pool...
August 1, 2017: FEMS Microbiology Letters
https://www.readbyqxmd.com/read/28853674/mr-imaging-based-multimodal-autoidentification-of-perivascular-spaces-mmaps-automated-morphologic-segmentation-of-enlarged-perivascular-spaces-at-clinical-field-strength
#4
Erin L Boespflug, Daniel L Schwartz, David Lahna, Jeffrey Pollock, Jeffrey J Iliff, Jeffrey A Kaye, William Rooney, Lisa C Silbert
Purpose To describe a fully automated segmentation method that yields object-based morphologic estimates of enlarged perivascular spaces (ePVSs) in clinical-field-strength (3.0-T) magnetic resonance (MR) imaging data. Materials and Methods In this HIPAA-compliant study, MR imaging data were obtained with a 3.0-T MR imager in research participants without dementia (mean age, 85.3 years; range, 70.4-101.2 years) who had given written informed consent. This method is built on (a) relative normalized white matter, ventricular and cortical signal intensities within T1-weighted, fluid-attenuated inversion recovery, T2-weighted, and proton density data and (b) morphologic (width, volume, linearity) characterization of each resultant cluster...
August 29, 2017: Radiology
https://www.readbyqxmd.com/read/28832973/longitudinal-trajectories-of-family-functioning-among-recent-immigrant-adolescents-and-parents-links-with-adolescent-and-parent-cultural-stress-emotional-well-being-and-behavioral-health
#5
Elma I Lorenzo-Blanco, Alan Meca, Brandy Piña-Watson, Byron L Zamboanga, José Szapocznik, Miguel Ángel Cano, David Cordova, Jennifer B Unger, Andrea Romero, Sabrina E Des Rosiers, Daniel W Soto, Juan A Villamar, Monica Pattarroyo, Karina M Lizzi, Seth J Schwartz
This study examined longitudinal effects of adolescent and parent cultural stress on adolescent and parent emotional well-being and health behaviors via trajectories of adolescent and parent family functioning. Recent immigrant Latino adolescents (Mage  = 14.51) and parents (Mage  = 41.09; N = 302) completed measures of these constructs. Latent growth modeling indicated that adolescent and parent family functioning remained stable over time. Early levels of family functioning predicted adolescent and parent outcomes...
August 18, 2017: Child Development
https://www.readbyqxmd.com/read/28814521/hiv-fusion-in-dendritic-cells-mainly-occurs-at-the-surface-and-is-limited-by-low-cd4-levels
#6
Lise Chauveau, Daniel Aaron Donahue, Blandine Monel, Francoise Porrot, Timothée Bruel, Lea Richard, Nicoletta Casartelli, Olivier Schwartz
HIV-1 poorly infects monocyte-derived dendritic cells (MDDCs). This is in a large part due to SAMHD1, which restricts viral reverse transcription. Pseudotyping HIV-1 with VSV-G strongly enhances infection, suggesting that earlier steps of viral replication, including fusion, are also inefficient in MDDCs. The site of HIV-1 fusion remains controversial and may depend on the cell type, with reports indicating that it occurs at the plasma membrane or contrarily, in an endocytic compartment. Here, we examined the pathways of HIV-1 entry in MDDCs...
August 16, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28759732/therapeutic-effects-of-doxycycline-on-the-quality-of-repaired-and-unrepaired-achilles-tendons
#7
Quynhhoa T Nguyen, Jolanta B Norelli, Adam Graver, Charles Ekstein, Johnathan Schwartz, Farzana Chowdhury, Mark C Drakos, Daniel A Grande, Nadeen O Chahine
BACKGROUND: Achilles tendon tears are devastating injuries, especially to athletes. Elevated matrix metalloproteinase (MMP) activity after a tendon injury has been associated with deterioration of the collagen network and can be inhibited with doxycycline (Doxy). HYPOTHESIS: Daily oral administration of Doxy will enhance the histological, molecular, and biomechanical quality of transected Achilles tendons. Additionally, suture repair will further enhance the quality of repaired tendons...
July 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28747407/chronic-hindbrain-administration-of-oxytocin-is-sufficient-to-elicit-weight-loss-in-diet-induced-obese-rats
#8
Zachary S Roberts, Tami H Wolden-Hanson, Miles E Matsen, Vitaly Ryu, Cheryl H Vaughan, James L Graham, Peter J Havel, Daniel Wahieb Chukri, Michael W Schwartz, Gregory J Morton, James E Blevins
Oxytocin (OT) administration elicits weight loss in diet-induced obese (DIO) rodents, nonhuman primates and humans by both reducing energy intake and increasing energy expenditure (EE). Although the neurocircuitry underlying these effects remains uncertain, OT neurons in the paraventricular nucleus are positioned to control both energy intake and sympathetic nervous system outflow to interscapular brown adipose tissue (IBAT) through projections to both the hindbrain nucleus of the solitary tract and spinal cord...
July 26, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/28741794/ecological-segregation-moderates-a-climactic-conclusion-to-trout-hybridization
#9
Michael K Young, Daniel J Isaak, Kevin S McKelvey, Taylor M Wilcox, Matthew R Campbell, Matthew P Corsi, Dona L Horan, Michael K Schwartz
Invasive hybridization, in which an introduced species may introgressively hybridize with a native taxon and threaten its persistence, is prominently featured in the conservation literature. One of the most frequently cited examples of this phenomenon involves interactions between native westslope cutthroat trout Oncorhynchus clarkii lewisi and introduced rainbow trout O. mykiss in a portion of the U.S. Northern Rocky Mountains (Allendorf & Leary, 1988). This article is protected by copyright. All rights reserved...
July 25, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28722720/a-guiding-map-for-inflammation
#10
Mihai G Netea, Frances Balkwill, Michel Chonchol, Fabio Cominelli, Marc Y Donath, Evangelos J Giamarellos-Bourboulis, Douglas Golenbock, Mark S Gresnigt, Michael T Heneka, Hal M Hoffman, Richard Hotchkiss, Leo A B Joosten, Daniel L Kastner, Martin Korte, Eicke Latz, Peter Libby, Thomas Mandrup-Poulsen, Alberto Mantovani, Kingston H G Mills, Kristen L Nowak, Luke A O'Neill, Peter Pickkers, Tom van der Poll, Paul M Ridker, Joost Schalkwijk, David A Schwartz, Britta Siegmund, Clifford J Steer, Herbert Tilg, Jos W M van der Meer, Frank L van de Veerdonk, Charles A Dinarello
Biologists, physicians and immunologists have contributed to the understanding of the cellular participants and biological pathways involved in inflammation. Here, we provide a general guide to the cellular and humoral contributors to inflammation as well as to the pathways that characterize inflammation in specific organs and tissues.
July 19, 2017: Nature Immunology
https://www.readbyqxmd.com/read/28720629/a-group-visit-initiative-improves-advance-care-planning-documentation-among-older-adults-in-primary-care
#11
Hillary D Lum, Rebecca L Sudore, Daniel D Matlock, Elizabeth Juarez-Colunga, Jacqueline Jones, Molly Nowels, Robert S Schwartz, Jean S Kutner, Cari R Levy
INTRODUCTION: Group visits for advance care planning (ACP) may help patients document preferences for decision makers and future care. We assessed the impact of a primary care-based ACP group visit (ACP-GV) intervention on older adults' ACP documentation and why patients participated. METHODS: Older adults (>65 years) in primary care participated in a 2-session ACP-GV intervention that promotes group dynamics, peer-based learning, and goal setting. Charts were reviewed at baseline, 3 months, and 12 months for documentation of decision makers and ACP forms...
July 2017: Journal of the American Board of Family Medicine: JABFM
https://www.readbyqxmd.com/read/28712573/ve-cadherin-phosphorylation-regulates-endothelial-fluid-shear-stress-responses-through-the-polarity-protein-lgn
#12
Daniel E Conway, Brian G Coon, Madhusudhan Budatha, Paul T Arsenovic, Fabrizio Orsenigo, Florian Wessel, Jiasheng Zhang, Zhenwu Zhuang, Elisabetta Dejana, Dietmar Vestweber, Martin A Schwartz
Fluid shear stress due to blood flow on the vascular endothelium regulates blood vessel development, remodeling, physiology, and pathology [1, 2]. A complex consisting of PECAM-1, VE-cadherin, and vascular endothelial growth factor receptors (VEGFRs) that resides at endothelial cell-cell junctions transduces signals important for flow-dependent vasodilation, blood vessel remodeling, and atherosclerosis. PECAM-1 transduces forces to activate src family kinases (SFKs), which phosphorylate and transactivate VEGFRs [3-5]...
July 24, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28658579/connecting-protein-conformation-and-dynamics-with-ligand-receptor-binding-using-three-color-f%C3%A3-rster-resonance-energy-transfer-tracking
#13
Mark Kastantin, David Faulón Marruecos, Navdeep Grover, Sean Yu McLoughlin, Daniel K Schwartz, Joel L Kaar
Specific binding between biomolecules, i.e., molecular recognition, controls virtually all biological processes including the interactions between cells and biointerfaces, both natural and synthetic. Such binding often relies on the conformation of biomacromolecules, which can be highly heterogeneous and sensitive to environmental perturbations, and therefore difficult to characterize and control. An approach is demonstrated here that directly connects the binding kinetics and stability of the protein receptor integrin αvβ3 to the conformation of the ligand fibronectin (FN), which are believed to control cellular mechanosensing...
July 12, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28658234/corrigendum-cd32a-is-a-marker-of-a-cd4-t-cell-hiv-reservoir-harbouring-replication-competent-proviruses
#14
Benjamin Descours, Gaël Petitjean, José-Luis López-Zaragoza, Timothée Bruel, Raoul Raffel, Christina Psomas, Jacques Reynes, Christine Lacabaratz, Yves Levy, Olivier Schwartz, Jean Daniel Lelievre, Monsef Benkirane
This corrects the article DOI: 10.1038/nature21710.
June 28, 2017: Nature
https://www.readbyqxmd.com/read/28640828/bovine-leukemia-virus-linked-to-breast-cancer-in-australian-women-and-identified-before-breast-cancer-development
#15
Gertrude C Buehring, HuaMin Shen, Daniel A Schwartz, James S Lawson
Bovine leukemia virus (BLV), a common virus of cattle globally, was believed for decades not to infect humans. More recent techniques (in situ PCR and DNA sequencing) enabled detection of BLV in human breast tissue, and determination of its significant association with breast cancer in a US population. Using similar techniques to study 96 Australian women, we report here detection of retrotranscribed BLV DNA in breast tissue of 40/50(80%) of women with breast cancer versus 19/46(41%) of women with no history of breast cancer, indicating an age-adjusted odds ratio and confidence interval of 4...
2017: PloS One
https://www.readbyqxmd.com/read/28640031/identifying-gaps-in-the-performance-of-pediatric-trainees-who-receive-marginal-unsatisfactory-ratings
#16
Su-Ting T Li, Daniel J Tancredi, Alan Schwartz, Ann Guillot, Ann Burke, R Franklin Trimm, Susan Guralnick, John D Mahan, Kimberly A Gifford
PURPOSE: To perform a derivation study to determine in which subcompetencies marginal/unsatisfactory pediatric residents had the greatest deficits compared with their satisfactorily performing peers and which subcompetencies best discriminated between marginal/unsatisfactory and satisfactorily performing residents. METHOD: Multi-institutional cohort study of all 21 milestones (rated on four or five levels) reported to the Accreditation Council for Graduate Medical Education, and global marginal/unsatisfactory versus satisfactory performance reported to the American Board of Pediatrics...
June 20, 2017: Academic Medicine: Journal of the Association of American Medical Colleges
https://www.readbyqxmd.com/read/28631307/interventions-for-the-prevention-of-recurrent-erysipelas-and-cellulitis
#17
REVIEW
Adam Dalal, Marina Eskin-Schwartz, Daniel Mimouni, Sujoy Ray, Walford Days, Emmilia Hodak, Leonard Leibovici, Mical Paul
BACKGROUND: Erysipelas and cellulitis (hereafter referred to as 'cellulitis') are common bacterial skin infections usually affecting the lower extremities. Despite their burden of morbidity, the evidence for different prevention strategies is unclear. OBJECTIVES: To assess the beneficial and adverse effects of antibiotic prophylaxis or other prophylactic interventions for the prevention of recurrent episodes of cellulitis in adults aged over 16. SEARCH METHODS: We searched the following databases up to June 2016: the Cochrane Skin Group Specialised Register, the Cochrane Central Register of Controlled Trials (CENTRAL), MEDLINE, Embase, and LILACS...
June 20, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28628351/sleep-in-adolescents-and-young-adults-in-the-year-after-cancer-treatment
#18
Lauren C Daniel, Richa Aggarwal, Lisa A Schwartz
PURPOSE: Adolescents and young adults (AYA) with cancer are a vulnerable group facing more intense treatments, higher symptom burden, and poorer treatment outcomes relative to younger children. Sleep disruption is common during cancer treatment and sleep problems persist into adulthood for some survivors of AYA cancer. The developmental period of adolescence/emerging adulthood confers greater biological and behavioral risk for insufficient sleep relative to older or younger ages. Thus, understanding AYA sleep disturbances shortly after completing treatment can inform interventions to manage cancer-related symptoms and improve quality of life...
June 19, 2017: Journal of Adolescent and Young Adult Oncology
https://www.readbyqxmd.com/read/28617996/gradient-nonlinearity-effects-on-upper-cervical-spinal-cord-area-measurement-from-3d-t1-weighted-brain-mri-acquisitions
#19
Nico Papinutto, Rohit Bakshi, Antje Bischof, Peter A Calabresi, Eduardo Caverzasi, R Todd Constable, Esha Datta, Gina Kirkish, Govind Nair, Jiwon Oh, Daniel Pelletier, Dzung L Pham, Daniel S Reich, William Rooney, Snehashis Roy, Daniel Schwartz, Russell T Shinohara, Nancy L Sicotte, William A Stern, Ian Tagge, Shahamat Tauhid, Subhash Tummala, Roland G Henry
PURPOSE: To explore (i) the variability of upper cervical cord area (UCCA) measurements from volumetric brain 3D T1 -weighted scans related to gradient nonlinearity (GNL) and subject positioning; (ii) the effect of vendor-implemented GNL corrections; and (iii) easily applicable methods that can be used to retrospectively correct data. METHODS: A multiple sclerosis patient was scanned at seven sites using 3T MRI scanners with the same 3D T1 -weighted protocol without GNL-distortion correction...
June 15, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28607687/glomerular-filtration-rate-trends-during-follow-up-in-children-with-steroid-sensitive-nephrotic-syndrome
#20
Sulaiman Alsaidi, Daniel Wagner, Silviu Grisaru, Julian Midgley, Lorraine Hamiwka, Andrew Wade, Alberto Nettel-Aguirre, Susan Samuel
BACKGROUND: Overall prognosis of children with steroid-sensitive nephrotic syndrome (SSNS) is regarded as generally favorable. However, only a few recent studies have evaluated changes in kidney function and blood pressure over time in children with SSNS. OBJECTIVES: We describe clinical features of SSNS patients and characterize changes in calculated estimated glomerular filtration rate (eGFR) and use of antihypertensive medications during follow-up. DESIGN: This is a retrospective cohort study...
2017: Canadian Journal of Kidney Health and Disease
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