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Lead removal

Charlotte Rombaut, Katrien Faes, Ellen Goossens
PURPOSE: Previous studies have shown that the removal of one testis leads to a compensatory mechanism in the contralateral one, but this was species and age dependent. The aim of this study was to check whether this compensation would still occur after the combination of a unilateral orchiectomy and gonadotoxic treatment, since this resembles the clinical situation of patients who have to undergo highly toxic cancer treatment and therefore choose to cryopreserve a testicular biopsy for fertility restoration purposes...
2016: PloS One
Hugo Pereira, Katkam N Gangadhar, Peter S C Schulze, Tamára Santos, Carolina Bruno de Sousa, Lisa M Schueler, Luísa Custódio, F Xavier Malcata, Luísa Gouveia, João C S Varela, Luísa Barreira
Bioprospecting for novel microalgal strains is key to improving the feasibility of microalgae-derived biodiesel production. Tetraselmis sp. CTP4 (Chlorophyta, Chlorodendrophyceae) was isolated using fluorescence activated cell sorting (FACS) in order to screen novel lipid-rich microalgae. CTP4 is a robust, euryhaline strain able to grow in seawater growth medium as well as in non-sterile urban wastewater. Because of its large cell size (9-22 μm), CTP4 settles down after a six-hour sedimentation step. This leads to a medium removal efficiency of 80%, allowing a significant decrease of biomass dewatering costs...
October 21, 2016: Scientific Reports
Fabien Brieuc, Yael Bronstein, Hichem Dammak, Philippe Depondt, Fabio Finocchi, Marc Hayoun
The quantum thermal bath (QTB) has been presented as an alternative to path-integral based methods to introduce nuclear quantum effects in molecular dynamics simulations. The method has proved to be efficient, yielding accurate results for various systems. However, the QTB method is prone to zero-point energy leakage (ZPEL) in highly anharmonic systems. This is a well known problem in methods based on classical trajectories where part of the energy of the high frequency modes is transferred to the low frequency modes leading to a wrong energy distribution...
October 21, 2016: Journal of Chemical Theory and Computation
Michele Antonio De Riggi, Nicola Rocco, Giulio Gherardini, Emanuela Esposito, Massimiliano D'Aiuto
INTRODUCTION: One-stage implant-based breast reconstruction using titanium-coated polypropylene mesh is a novel approach widely used in Europe. Complication rates in breast reconstruction with the use of titanium-coated meshes seem to be comparable to those in patients with implant-based breast reconstruction alone. However, the use of synthetic meshes in implant-based breast reconstructive surgery leads to new clinical scenarios with the need for the breast surgeon to face new complications...
October 20, 2016: Aesthetic Plastic Surgery
Prashant K Sharma, Tineke P Willems, Daan J Touw, Willem Woudstra, Michiel E Erasmus, Tjark Ebels
BACKGROUND: Three European centers have recently reported dramatic failures of the STRATOS titanium system, approved in Europe and the United States since 2007 and meant for pectus repair, without detailed exploration of its causes. METHODS: Failed implants (fractures or loosened crimp connectors) were surgically explanted from 12 patients and biopsies taken from surrounding discolored tissue. Detailed failure analysis was performed to find the cause of failures...
October 17, 2016: Annals of Thoracic Surgery
Zuriñe Antón, Ane Landajuela, Javier H Hervás, L Ruth Montes, Sonia Hernández-Tiedra, Guillermo Velasco, Felix M Goñi, Alicia Alonso
The phospholipid cardiolipin (CL) has been proposed to play a role in selective mitochondrial autophagy, or mitophagy. CL externalization to the outer mitochondrial membrane would act as a signal for the human Atg8 ortholog subfamily, MAP1LC3 (LC3). The latter would mediate both mitochondrial recognition and autophagosome formation, ultimately leading to removal of damaged mitochondria. We have applied quantitative biophysical techniques to the study of CL interaction with various Atg8 human orthologs, namely LC3B, GABARAPL2 and GABARAP...
October 20, 2016: Autophagy
Alissa J Brown, Douglas H Deutschman, Jessica Braswell, Dana McLaughlin
Granivorous animals may prefer to predate or cache seed of certain plant species over others. Multiple studies have documented preference for larger, non-native seed by granivores. To accomplish this, researchers have traditionally used indirect inference by relating patterns of seed removal to the species composition of the granivorous animal community. To measure seed removal, researchers present seed to granivorous animals in the field using equipment intended to exclude certain animal taxa while permitting access to others...
2016: PloS One
Chenting Yan, Zhifang Li, Xu-Qiong Xiao, Ningka Wei, Qiong Lu, Mitsuo Kira
A fluorostannylenoid (Cs(+) [R2 SnF](-) (9), R2 =(TMS)2 CCH2 CH2 C(TMS)2 ) was prepared by reacting a stable dialkylstannylene (R2 Sn (8), R2 =(TMS)2 CCH2 CH2 C(TMS)2 ) with cesium fluoride at room temperature in THF. While 9 is stable in THF and DME, removal of the solvent leads to the regeneration of stannylene 8. No reaction occurred when 8 was treated with CsF in a hydrocarbon solvent. Addition of dibenzo-21-crown-7 ether to the THF solution of stannylenoid 9 followed by usual workup affords the corresponding crystalline stannylenoid crown ether complex, the X-ray structural analysis of which revealed a fluorine-bridged contact ion-pair structure...
October 20, 2016: Angewandte Chemie
Ai Phing Lim, Zufarzaana Zulkeflee, Ahmad Zaharin Aris
Dead calcareous skeletons (CSs) as low-cost adsorbents were studied to remove lead ions (Pb (II)) in an aqueous solution. Factors influencing the efficiency of CSs were evaluated by adsorbent size, contact time, initial concentration, dosage concentration and pH. The optimum CS size for removal of Pb (II) was 710 μm at an equilibrium time of 720 min. The best dosage of CS was 10 g/L for a 99% removal efficiency without pH adjustment. Pb (II) ions were effectively removed in the initial pH of the metal solution...
October 2016: Water Science and Technology: a Journal of the International Association on Water Pollution Research
Kate E Smith, Martin M Shafer, Debora Weiss, Henry A Anderson, Patrick R Gorski
Exposure to the neurotoxic element lead (Pb) continues to be a major human health concern, particularly for children in US urban settings, and the need for robust tools for assessment of exposure sources has never been greater. The latest generation of multicollector inductively coupled plasma mass spectrometry (MC-ICPMS) instrumentation offers the capability of using Pb isotopic signatures as a tool for environmental source tracking in public health. We present a case where MC-ICPMS was applied to isotopically resolve Pb sources in human clinical samples...
October 19, 2016: Biological Trace Element Research
Darren M Hutt, Daniela Martino Roth, Christelle Marchal, Marion Bouchecareilh
Gene expression is regulated in part through the reversible acetylation of histones, by the action of histone acetyltransferases (HAT) and histone deacetylases (HDAC). HAT activity results in the addition of acetyl groups on the lysine residues of histone tails leading to decondensation of the chromatin, and increased gene transcription in general, whereas HDACs remove these acetyl groups, thus leading to an overall suppression of gene transcription. Recent evidence has elucidated that histones are not the only components of the proteome that are targeted by HATs and HDACs...
2017: Methods in Molecular Biology
Camille C Gunderson, Blake Parsons, Shyla Penaroza, Marvin D Peyton, Lisa M Landrum
Intravenous leiomyomatosis is a benign smooth muscle tumor which despite its histology can have devastating consequences. Furthermore, the clinical manifestations are variable and nonspecific, typically leading to delayed or missed diagnosis. Thus, it is critical for clinicians to be aware of this condition and have a high index of suspicion in a middle-aged woman with a history of uterine leiomyoma presenting with an inferior vena cava mass to enable early diagnosis and treatment. We report a case of a large intravenous leiomyoma which was initially considered to be a very large deep venous thrombosis; with thorough preoperative planning, it was successfully removed intact and in entirety with a single-stage operation...
May 2016: Journal of Radiology Case Reports
Igor A Zolotukhin, Evgeny I Seliverstov, Elena A Zakharova, Alexander I Kirienko
OBJECTIVE: To establish an effect of isolated phlebectomy in patients with incompetent great saphenous vein (Ambulatory Selective Varices Ablation under Local anesthesia (ASVAL) procedure) on the reflux and diameter of the trunk and to assess recurrence rate of varicose veins at one year. MATERIAL AND METHODS: We conducted a prospective study on patients with primary varicose veins and with C2 or C2,3 or C2,3,4 or C2,4 classes of chronic venous disease and great saphenous vein incompetence...
October 19, 2016: Phlebology
Miguel A Brieño-Enríquez, Stefannie L Moak, Melissa Toledo, Joshua J Filter, Stephen Gray, José L Barbero, Paula E Cohen, J Kim Holloway
Mammalian NIMA-like kinase-1 (NEK1) is a dual-specificity kinase highly expressed in mouse germ cells during prophase I of meiosis. Loss of NEK1 induces retention of cohesin on chromosomes at meiotic prophase I. Timely deposition and removal of cohesin is essential for accurate chromosome segregation. Two processes regulate cohesin removal: a non-proteolytic mechanism involving WAPL, sororin, and PDS5B and direct cleavage by separase. Here, we demonstrate a role for NEK1 in the regulation of WAPL loading during meiotic prophase I, via an interaction between NEK1 and PDS5B...
October 18, 2016: Cell Reports
Yuqin Zou, Alex S Walton, Ian A Kinloch, Robert A W Dryfe
A study of the differences between the capacitance of freshly exfoliated highly ordered pyrolytic graphite (HOPG, sample denoted FEG), HOPG aged in air (denoted AAG) and aged in an inert atmosphere (hereafter IAG) is presented in this work. The FEG is found to be more hydrophilic than AAG and IAG since the aqueous electrolyte contact angle (CA) increases from 61.7o to 72.5o and 81.8o after aging in Ar and air, respectively. Electrochemical impedance spectroscopy (EIS) shows the FEG has higher intrinsic capacitance (6...
October 19, 2016: Langmuir: the ACS Journal of Surfaces and Colloids
Daniel W Birch, Jerry T Dang, Noah J Switzer, Namdar Manouchehri, Xinzhe Shi, Ghassan Hadi, Shahzeer Karmali
BACKGROUND: Intraoperative hypothermia during both open and laparoscopic abdominal surgery may be associated with adverse events. For laparoscopic abdominal surgery, the use of heated insufflation systems for establishing pneumoperitoneum has been described to prevent hypothermia. Humidification of the insufflated gas is also possible. Past studies on heated insufflation have shown inconclusive results with regards to maintenance of core temperature and reduction of postoperative pain and recovery times...
October 19, 2016: Cochrane Database of Systematic Reviews
Behjatolah Monzavi-Karbassi, Fariba Jousheghany, Thomas Kieber-Emmons
Development of cancer vaccines targeting tumor-associated antigens (TAAs) is an alternative approach to chemotherapy with sustained anti-tumor effects. The success of active immunotherapy has been hampered by tumor-induced immune suppressors. Regulatory T cells (Tregs) are a population of immune suppressors with a proven role in regulating anti-tumor immune responses. Removing or subduing Tregs activity leads to more robust anti-tumor immune responses. Here, we used a cell-based vaccination strategy in the 4T1 murine mammary model to examine whether bulk removal of certain TAAs, using their glycan profile, can affect the immunogenicity of the vaccine...
October 19, 2016: Immunological Investigations
Alexandre Guillot, Manuel Dauchez, Nicolas Belloy, Jessica Jonquet, Laurent Duca, Beatrice Romier, Pascal Maurice, Laurent Debelle, Laurent Martiny, Vincent Durlach, Stephanie Baud, Sebastien Blaise
Sialic acids (SA) are monosaccharides that can be located at the terminal position of glycan chains on a wide range of proteins. The post-translational modifications, such as N-glycan chains, are fundamental to protein functions. Indeed, the hydrolysis of SA by specific enzymes such as neuraminidases can lead to drastic modifications of protein behavior. However, the relationship between desialylation of N-glycan chains and possible alterations of receptor function remains unexplored. Thus, the aim of the present study is to establish the impact of SA removal from N-glycan chains on their conformational behavior...
October 19, 2016: Scientific Reports
Mi Hee Choi, Ha-Eun Shim, Seong-Jae Yun, Sang-Hyun Park, Dae Seong Choi, Beom-Su Jang, Yong Jun Choi, Jongho Jeon
There have been worldwide attentions on the efficient removal of radioactive iodine, because it is commonly released in nuclear plant accidents. Increasing concerns on environmental problems due to the radioactive iodine are leading us to develop stable and sustainable technology for remediation of radioelement contaminants. In this work, we report a highly efficient chromatographic method for specific and rapid capture of radioactive iodine. The gold nanoparticles immobilized dextran gel columns showed excellent removal capabilities of radioactive iodine in various conditions...
October 19, 2016: ACS Applied Materials & Interfaces
P Fabbrini, K Finkel, M Gallieni, G Capasso, M Cavo, A Santoro, S Pasquali
Acute kidney injury (AKI) is a frequent complication of multiple myeloma and is associated with increased short-term mortality. Additionally, even a single episode of AKI can eventually lead to end-stage renal disease (ESRD), significantly reducing quality of life and long-term survival. In the setting of multiple myeloma, severe AKI (requiring dialysis) is typically secondary to cast nephropathy (CN). Renal injury in CN is due to intratubular obstruction from precipitation of monoclonal serum free light chains (sFLC) as well as direct tubular toxicity of sFLC via stimulation of nuclear factor (NF)κB inflammatory pathways...
October 18, 2016: Journal of Nephrology
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