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https://www.readbyqxmd.com/read/28433058/ultrathin-au-nanowires-assisted-magnetic-graphene-silica-zic-hilic-composites-for-highly-specific-enrichment-of-n-linked-glycopeptides
#1
Fenglong Jiao, Fangyuan Gao, Heping Wang, Yulin Deng, Yangjun Zhang, Xiaohong Qian, Yukui Zhang
Protein glycosylation has been proven to participate in a variety of complex biological processes; however, the low abundance of glycopeptides in natural samples makes it essential to develop methods to isolate and enrich glycopeptides. In this study, a novel ultrathin Au nanowire assisted zwitterionic hydrophilic magnetic graphene oxide (GO-Fe3O4/SiO2/AuNWs/L-Cys) was synthesized with the good biocompatibility of GO, strong magnetic responses of Fe3O4, large surface area of ultrathin Au nanowires and excellent hydrophilicity of L-Cys via four simple and rapid steps...
June 1, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28433025/a-combined-theoretical-and-experimental-study-of-phenol-acetylene-n-n-%C3%A2-7-clusters
#2
Gurmeet Singh, Apurba Nandi, Shridhar R Gadre, Takashi Chiba, Asuka Fujii
Structures and vibrational spectra of phenol-(acetylene)n (Ph(Ac)n) clusters are studied by a combination of theoretical calculations and infrared (IR) spectroscopy. The molecular electrostatic potential features are utilized for generating trial geometries of the medium-sized Ph(Ac)n (n = 1, 2, 4, 6, and 7) clusters. These initial geometries are subjected to geometry optimization within the second-order Møller-Plesset (MP2) theory, employing correlation consistent aug-cc-pVDZ (aVDZ) basis set. Minimal nature of the reported structures is confirmed by doing vibrational frequency run at MP2/aVDZ level of theory using full calculations for n = 1 and 2 and employing grafting based molecular tailoring approach for the n = 4, 6, and 7...
April 21, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28432872/human-effector-memory-t-helper-cells-engage-with-mouse-macrophages-and-cause-graft-versus-host-like-pathology-in-skin-of-humanized-mice-used-in-a-nonclinical-immunization-study
#3
Bala S Sundarasetty, Valery Volk, Sebastian J Theobald, Susanne Rittinghausen, Dirk Schaudien, Vanessa Neuhaus, Constanca Figueiredo, Andreas Schneider, Laura Gerasch, Adele Mucci, Thomas Moritz, Constantin von Kaisenberg, Loukia M Spineli, Katherina Sewald, Armin Braun, Henning Weigt, Arnold Ganser, Renata Stripecke
Humanized mice engrafted with human hematopoietic stem cells and developing functional human T-cell adaptive responses are in critical demand to test human-specific therapeutics. We previously showed that humanized mice immunized with long-lived induced-dendritic cells loaded with the pp65 viral antigen (iDCpp65) exhibited a faster development and maturation of T cells. Herein, we evaluated these effects in a long-term (36 weeks) nonclinical model using two stem cell donors to assess efficacy and safety. Relative to baseline, iDCpp65 immunization boosted the output of effector memory CD4(+) T cells in peripheral blood and lymph nodes...
April 19, 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/28431047/impact-of-the-syntax-scores-i-and-ii-in-patients-with-diabetes-and-multivessel-coronary-disease-a-pooled-analysis-of-patient-level-data-from-the-syntax-precombat-and-best-trials
#4
Rafael Cavalcante, Yohei Sotomi, Massimo Mancone, Cheol Whan Lee, Jung-Min Ahn, Yoshinobu Onuma, Pedro A Lemos, Robert-Jan van Geuns, Seung-Jung Park, Patrick W Serruys
Aims: To assess the impact of the SYNTAX scores I and II in outcomes after percutaneous coronary intervention (PCI) and coronary artery bypass graft (CABG) for patients with diabetes and multivessel disease (MVD). Methods and Results: We performed a patient-level pooled analysis of three large randomized trials of patients with MVD. The impact of coronary anatomic complexity as measured by the SYNTAX score in the differences in outcomes following PCI and CABG was assessed at a median follow-up of 5 years...
April 18, 2017: European Heart Journal
https://www.readbyqxmd.com/read/28430904/catheter-based-tricuspid-valve-replacement-first-experimental-data-of-a-newly-designed-bileaflet-stent-graft-prosthesis%C3%A2
#5
Henning F Lausberg, Rafal Gryszkiewicz, Maximilian Kuetting, Moritz Baumgaertner, Marcos Centola, Hans-Peter Wendel, Martina Nowak-Machen, David Schibilsky, Tobias Kruger, Christian Schlensak
OBJECTIVES: Moderate or severe degree tricuspid valve regurgitation (TVR) is associated with high rates of morbidity and mortality. Surgical correction as the only therapeutic option offers unsatisfactory results. Recently, several interventional procedures have been introduced clinically in a limited cohort. We present our initial experiments with an innovative interventional valved stent graft for treatment of TVR. METHODS: A newly designed porcine pericardium-covered nitinol stent graft with a lateral bicuspid valve was adapted to size in a cadaver study...
April 18, 2017: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/28429930/enzymatically-debranched-xylans-in-graft-copolymerization
#6
Kuisma Littunen, Galina Mai-Gisondi, Jukka Seppälä, Emma R Master
Wheat arabinoxylan was treated with two α-arabinofuranosidases exhibiting different mode of action to create three different polymeric substrates. These three substrate preparations were characterized by xylopyranose backbone sugars that are (1) singly substituted by arabinose at C2 or C3, (2) doubly substituted by arabinose at C2 and C3, and (3) largely unsubstituted. All xylan preparations were grafted with glycidyl methacrylate using cerium ammonium nitrate and then evaluated in terms of graft yield and adsorption to cellulose surfaces...
April 21, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28428057/natural-killer-cells-differentiated-in-vitro-from-cord-blood-cd34-cells-are-more-advantageous-for-use-as-an-immunotherapy-than-peripheral-blood-and-cord-blood-natural-killer-cells
#7
Anna Domogala, Michael Blundell, Adrian Thrasher, Mark W Lowdell, J Alejandro Madrigal, Aurore Saudemont
BACKGROUND AIMS: Natural killer (NK) cells have the potential to become a successful immunotherapy as they can target malignant cells without being direct effectors of graft-versus-host disease. Our group has previously shown that large numbers of functional NK cells can be differentiated in vitro from umbilical cord blood (CB) CD34(+) cells. To produce a clinically relevant and effective immunotherapy, we hypothesized that it is essential that the NK cells are able to proliferate and persist in vivo while maintaining an optimal activation status and killing capacity...
April 17, 2017: Cytotherapy
https://www.readbyqxmd.com/read/28427392/percutaneous-intervention-versus-coronary-artery-bypass-graft-surgery-in-left-main-coronary-artery-stenosis-a-systematic-review-and-meta-analysis
#8
Xin-Lin Zhang, Qing-Qing Zhu, Jing-Jing Yang, Yu-Han Chen, Yang Li, Su-Hui Zhu, Jun Xie, Lian Wang, Li-Na Kang, Biao Xu
BACKGROUND: The optimal revascularization technique in patients with left main coronary artery disease (CAD) remains controversial. We aimed to compare the long-term performance of percutaneous coronary intervention (PCI) versus coronary artery bypass graft (CABG) surgery in treatment of left main CAD. METHODS: PubMed, EMBASE, and the Cochrane Library were searched until November 16, 2016. RESULTS: Six randomized controlled trials and 22 matched observational studies including 22,487 patients and 90,167 patient-years of follow-up were included...
April 21, 2017: BMC Medicine
https://www.readbyqxmd.com/read/28427320/the-role-of-inelastic-deformations-in-the-mechanical-response-of-endovascular-shape-memory-alloy-devices
#9
Lorenza Petrini, Alessandro Bertini, Francesca Berti, Giancarlo Pennati, Francesco Migliavacca
Nickel-titanium alloys are commonly adopted for producing cardiovascular minimally invasive devices such as self-expandable stents, aortic valves and stent-grafts. These devices are subjected to cyclic loads (due to blood pulsatility, leg or heart movements), that can induce fatigue fracture, and may also be subjected to very large deformations (due to crimping procedure, a tortuous physiological path or overloads), that can induce material yield. Recently, the authors developed a new constitutive model that considers inelastic strains due to not-completed reverse phase transformation (not all the stress-induced martensite turns back to austenite) or/and plasticity and their accumulation during cyclic loads...
May 2017: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/28426449/temperature-and-oxygenation-during-organ-preservation-friends-or-foes
#10
Nicholas Gilbo, Diethard Monbaliu
PURPOSE OF REVIEW: The liberalization of donor selection criteria in organ transplantation, with the increased use of suboptimal grafts, has stimulated interest in ischemia-reperfusion injury prevention and graft reconditioning. Organ preservation technologies are changing considerably, mostly through the reintroduction of dynamic machine preservation. Here, we review the current evidence on the role of temperature and oxygenation during dynamic machine preservation. RECENT FINDINGS: A large but complex body of evidence exists and comparative studies are few...
April 19, 2017: Current Opinion in Organ Transplantation
https://www.readbyqxmd.com/read/28426243/analysis-of-2019-patients-undergoing-revision-anterior-cruciate-ligament-reconstruction-from-a-community-based-registry
#11
Afshin Arianjam, Maria C S Inacio, Tadashi T Funahashi, Gregory B Maletis
BACKGROUND: Knowledge of patient characteristics, surgical fixation, graft choice, outcomes, and concurrent injuries of revision anterior cruciate ligament reconstruction (ACLR) is limited. PURPOSE: To describe the current cohort of revision ACLR captured by a community registry and the outcomes observed in the registered patients. STUDY DESIGN: Case series; Level of evidence, 4. METHODS: Patients who underwent revision ACLR registered between February 2005 and June 2014, by 200 surgeons in 46 hospitals, were evaluated...
April 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28425579/myringoplasty-outcomes-from-the-swedish-national-quality-registry
#12
Malin Berglund, Rut Florentzson, Mattias Fransson, Malou Hultcrantz, Per O Eriksson, Erling Englund, Eva Westman
OBJECTIVES/HYPOTHESIS: Data from patients registered for myringoplasty during 2002 to 2012 in the Swedish National Quality Registry for Myringoplasty. STUDY DESIGN: Both conventional myringoplasty and fat-graft techniques were used aimed at healing the tympanic membrane in noninfected ears. METHODS: Analysis was performed on data in a national database collected from 32 ear, nose, and throat clinics. Surgical procedures and outcomes, and patient satisfaction from a questionnaire were studied...
April 20, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28425317/mortality-risk-factors-from-converting-off-pump-coronary-artery-bypass-to-on-pump-coronary-artery-bypass
#13
Na Miao, Feng Yang, Zhongtao Du, Chunjing Jiang, Xing Hao, Jinhong Wang, Yu Jiang, Xiaofang Yang, Haixiu Xie, Xiaotong Hou
INTRODUCTION: A number of large-scale retrospective studies revealed that off-pump coronary artery bypass (OPCAB) was superior to on-pump coronary artery bypass (ONCAB). The aim of the study was to investigate risk factors for mortality when OPCAB is converted to ONCAB. METHODS: Patients who underwent OPCAB conversion to ONCAB at the Beijing Anzhen Hospital between January 2003 and January 2013 were assigned to the non-survivor and survivor groups. Background demographics, illness history and preoperative, intraoperative and postoperative variables were compared...
April 1, 2017: Perfusion
https://www.readbyqxmd.com/read/28422830/management-of-the-extensive-thoracic-defects-after-deep-sternal-wound-infection-with-the-rectus-abdominis-myocutaneous-flap-a-retrospective-case-series
#14
Yue-Hua Li, Zhao Zheng, Jiaomei Yang, Lin-Lin Su, Yang Liu, Fu Han, Jia-Qi Liu, Da-Hai Hu
Deep sternal wound infection is a severe complication after open heart surgery. According to the different severity and dimensions of the deep sternal wound infection, the treatment method is different. In this study, we aimed to describe our experience with the rectus abdominis myocutaneous flap for large sternal wound management, especially when 1 or 2 internal mammary arteries were absent.Between October 2010 and January 2016, a retrospective review of 9 patients who suffered from the extensive thoracic defects after deep sternal wound infection was conducted...
April 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28421681/early-clinical-xenotransplantation-experiences-an-interview-with-thomas-e-starzl-md-phd
#15
REVIEW
David K C Cooper
Dr Thomas E. Starzl, who died on March 4, 2017, was one of the great pioneers of organ transplantation. He was also a pioneer in the field of xenotransplantation. In 1964, he carried out baboon kidney transplants in six patients with terminal renal disease for whom no living or deceased donor became available; graft survival was for 19-60 days, the grafts being lost largely through continuous complement activation. Between 1966 and 1974, he carried out one ex vivo liver perfusion and three orthotopic liver transplants using chimpanzees as sources of organs; graft survival was for <14 days...
March 2017: Xenotransplantation
https://www.readbyqxmd.com/read/28417522/determinants-of-large-drain-losses-early-after-pediatric-liver-transplantation
#16
Antonio Marseglia, Marco Ginammi, Michela Bosisio, Paola Stroppa, Michele Colledan, Lorenzo D'Antiga
The goal of this study was to evaluate postoperative ascites to correlate it with graft dysfunction and other complications. We therefore reviewed the files of patients transplanted between 2009 and 2014 to correlate drain losses with indication, patient and organ size, PELD, graft type, GRWR, NRBW, NGWD, cold ischemia time, histologically proven graft dysfunction, and surgical complications. Of 120 LTs in 104 patients, 48 (40%) were complicated by graft dysfunction, 43 (36%) by surgical complications, and 25 (21%) by cellular rejection...
April 17, 2017: Pediatric Transplantation
https://www.readbyqxmd.com/read/28415522/biocompatible-nanocomposite-scaffolds-based-on-copolymer-grafted-chitosan-for-bone-tissue-engineering-with-drug-delivery-capability
#17
Samaneh Saber-Samandari, Saeed Saber-Samandari
Significant efforts have been made to develop a suitable biocompatible scaffold for bone tissue engineering. In this work, a chitosan-graft-poly(acrylic acid-co-acrylamide)/hydroxyapatite nanocomposite scaffold was synthesized through a novel multi-step route. The prepared scaffolds were characterized for crystallinity, morphology, elemental analysis, chemical bonds, and pores size in their structure. The mechanical properties (i.e. compressive strength and elastic modulus) of the scaffolds were examined. Further, the biocompatibility of scaffolds was determined by MTT assays on HUGU cells...
June 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28415405/incorporation-of-glass-reinforced-hydroxyapatite-microparticles-into-poly-lactic-acid-electrospun-fibre-mats-for-biomedical-applications
#18
Daniel Santos, Cristina O Correia, Dina M Silva, Pedro S Gomes, Maria H Fernandes, José D Santos, Vitor Sencadas
Tissue engineering is constantly evolving towards novel materials that mimic the properties of the replaced injured tissue or organ. A hybrid electrospun membrane of electroactive poly(l-acid lactic) (PLLA) polymer with glass reinforced hydroxyapatite (Bonelike®) microparticles placed among the polymer fibres in a morphology like "islands in the sea" was processed. The incorporation of 60 to 80wt% Bonelike® bone grafts granules with ≤150μm into the polymer solution lead to an amorphous polymeric fibre membranes, and a decrease of the average polymer fibre diameter from 550±150nm for neat PLA down to 440±170nm for the hybrid composite...
June 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28415397/surface-modified-bioresorbable-electrospun-scaffolds-for-improving-hemocompatibility-of-vascular-grafts
#19
Pablo C Caracciolo, María Isabel Rial-Hermida, Florencia Montini-Ballarin, Gustavo A Abraham, Angel Concheiro, Carmen Alvarez-Lorenzo
The replacement of small-diameter vessels is one of the main challenges in tissue engineering. Moreover, the surface modification of small-diameter vascular grafts (SDVG) is a key factor in the success of the therapy due to their increased thrombogenicity and infection susceptibility caused by the lack of a functional endothelium. In this work, electrospun scaffolds were prepared from blends of poly(L-lactic acid) (PLLA) and segmented polyurethane (PHD) with a composition designed to perform as SDVG inner layer...
June 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28412984/facial-carbuncle-a-new-method-of-conservative-surgical-management-plus-irrigation-with-antibiotic-containing-solution
#20
L X Ngui, L S Wong, G Shashi, M N Abu Bakar
OBJECTIVE: This paper reports on a non-conventional method for the management of facial carbuncles, highlighting its superiority over conventional surgical treatment in terms of cosmetic outcome and shorter duration of wound healing. BACKGROUND: The mainstay of treatment for carbuncles involves the early administration of antibiotics in combination with surgical intervention. The conventional saucerisation, or incision and drainage, under normal circumstances results in moderate to large wounds, which may need secondary surgery such as skin grafting, resulting in a longer duration of wound healing and jeopardising cosmetic outcome...
April 17, 2017: Journal of Laryngology and Otology
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