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https://www.readbyqxmd.com/read/28748290/selection-for-novel-acid-tolerant-desulfovibrio-spp-from-a-closed-transbaikal-mine-site-in-a-temporal-ph-gradient-bioreactor
#1
Dmitry V Antsiferov, Tatiana S Fyodorova, Anastasia A Kovalyova, Anastasia Lukina, Yulia A Frank, Marat R Avakyan, David Banks, Olli H Tuovinen, Olga V Karnachuk
Almost all the known isolates of acidophilic or acid-tolerant sulphate-reducing bacteria (SRB) belong to the spore-forming genus Desulfosporosinus in the Firmicutes. The objective of this study was to isolate acidophilic/acid-tolerant members of the genus Desulfovibrio belonging to deltaproteobacterial SRB. The sample material originated from microbial mat biomass submerged in mine water and was enriched for sulphate reducers by cultivation in anaerobic medium with lactate as an electron donor. A stirred tank bioreactor with the same medium composition was inoculated with the sulphidogenic enrichment...
July 26, 2017: Antonie Van Leeuwenhoek
https://www.readbyqxmd.com/read/28748216/t-cells-targeting-neuromyelitis-optica-autoantigen-aquaporin-4-cause-paralysis-and-visual-system-injury
#2
COMMENT
Andrés Cruz-Herranz, Sharon A Sagan, Raymond A Sobel, Ari J Green, Scott S Zamvil
Aquaporin-4 (AQP4)-specific antibodies are instrumental in promoting central nervous system (CNS) tissue injury in neuromyelitis optica (NMO), yet evidence indicates that AQP4-specific T cells also have a pivotal role in NMO pathogenesis. Although considerable effort has been devoted to creation of animal models to study how AQP4-specific T cells and antibodies may cooperate in development of both clinical and histologic opticospinal inflammatory disease, the initial attempts were unsuccessful. Recently, it was discovered that T cells from AQP4-deficient (AQP4(-/-)) mice recognize distinct AQP4 epitopes that were not identified previously in wild-type (WT) mice, and that donor Th17 cells from AQP4(-/-) mice that target those novel epitopes could cause paralysis and visual system injury associated with opticospinal inflammation in WT recipient mice...
May 2017: Journal of Nature and Science
https://www.readbyqxmd.com/read/28746728/analysis-of-the-electronic-structure-of-the-special-pair-of-a-bacterial-photosynthetic-reaction-center-by-13-c-photochemically-induced-dynamic-nuclear-polarization-magic-angle-spinning-nmr-using-a-double-quantum-axis
#3
Marija Najdanova, Daniel Gräsing, A Alia, Jörg Matysik
The origin of the functional symmetry break in bacterial photosynthesis challenges since several decades. Although structurally very similar, the two branches of cofactors in the reaction center (RC) protein complex act very differently. Upon photochemical excitation, an electron is transported along one branch, while the other remains inactive. Photochemically induced dynamic nuclear polarization (photo-CIDNP) magic-angle spinning (MAS) (13) C NMR revealed that the two bacteriochlorophyll cofactors forming the "Special Pair" donor dimer are already well distinguished in the electronic ground-state...
July 26, 2017: Photochemistry and Photobiology
https://www.readbyqxmd.com/read/28746268/101-consecutive-profunda-artery-perforator-flaps-in-breast-reconstruction-lessons-learned-with-our-early-experience
#4
Nicholas T Haddock, Andrew Gassman, Min-Jeong Cho, Sumeet S Teotia
BACKGROUND: Free and local flaps based on the profunda artery perforators were first used for reconstruction of pressure sores, burn contractures, and extremity wounds. Recently, a revised profunda artery perforator flap was introduced for breast reconstruction. However, despite increasing reports of the use of the flap, it remains a rarely used option. The authors present their early experience with the first 101 profunda artery perforator flaps used for breast reconstruction at their institution...
August 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28745744/spin-dependent-interactions-catalyse-the-oxygen-electrochemistry
#5
J Gracia
The technological interest of oxygen reduction and evolution reactions, ORR and OER, for the clean use and storage of energy has resulted in the discovery of multiple catalysts; and the physical and catalytic properties of the most active compositions are only comprehensible with the consideration of magnetic interactions. Spin dependent potentials via exchange interactions, spin-orbit coupling or through magneto-electric effects catalyse the oxygen electrochemistry. The best catalysts show metal sites with localized spins and electron delocalization; a correlation exists between the rate constant for charge transfer reactions and spin-dependent electron mobility...
July 26, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28743073/in-situ-biodegradation-potential-of-1-2-dca-and-vc-at-sites-with-different-hydrogeological-settings
#6
R C M Nobre, M M M Nobre, T M P Campos, D Ogles
This paper investigates the feasibility of applying in-situ Bioremediation (ISB) to three sites contaminated with vinyl chloride and/or chlorinated alkanes such as 1,2-DCA and 1,1,2-TCA, presenting distinct hydrogeological settings and history of contaminant loading. Biotransformation of these compounds is well established in laboratory studies and pure cultures. Due to confidential aspects, however, few field data are available to support real case studies to the predictability of their fate and lifetime in soil and groundwater...
July 15, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28742378/effect-of-the-various-steps-in-the-processing-of-human-milk-in-the-concentrations-of-iga-igm-and-lactoferrin
#7
Gerardo Arroyo, Kevin Alexander Ortiz Barrientos, Karla Lange, Federico Nave, Gabriela Miss Mas, Pamela Lam Aguilar, Miguel Angel Soto Galindo
INTRODUCTION: Human milk immune components are unique and important for the development of the newborn. Milk processing at the Human Milk Banks (HMB), however, causes partial destruction of immune proteins. The objective of this study was to determine the effects that heating during the milk processing procedure at the HMB had on the concentrations of IgA, IgM, and lactoferrin at three critical points in time. MATERIALS AND METHODS: Fifty milk samples (150 mL) were collected from voluntary donors at the HMB at the Hospital Nacional Pedro de Bethancourt, located in Antigua Guatemala...
July 25, 2017: Breastfeeding Medicine: the Official Journal of the Academy of Breastfeeding Medicine
https://www.readbyqxmd.com/read/28740510/hematopoietic-stem-cell-transplantation-a-bioethical-lens
#8
REVIEW
Arcangelo Liso, Margherita Neri, Francesca Maglietta, Raffaele La Russa, Emanuela Turillazzi
Hematopoietic stem cell transplantation (HSCT) is one of a range of therapeutic options available to patients suffering from various diseases. HSCT procedure involves important ethical and legal aspects that can occur at every phase of the procedure: the clinical choice of whether to perform the procedure, pretransplantation preparation regimens, donor selection, stem cell harvest procedure, transplantation phase, and short-term and long-term follow-up care. In this discussion paper, we outline the ethical issue-facing physicians involved in HSCT...
2017: Stem Cells International
https://www.readbyqxmd.com/read/28739402/graft-detachment-and-re-bubbling-rate-in-descemet-membrane-endothelial-keratoplasty
#9
REVIEW
Mohit Parekh, Pia Leon, Alessandro Ruzza, Davide Borroni, Stefano Ferrari, Diego Ponzin, Vito Romano
Descemet Membrane Endothelial Keratoplasty (DMEK) is a selective replacement of dysfunctional endothelium with healthy donor Descemet's membrane and endothelium. Although the donor preparation and surgical methods still remain a challenge, DMEK is gaining popularity in terms of early rehabilitation and visual outcomes. New and improved donor preparation techniques like pre-stripped DMEK tissues are taken up rapidly due to less manipulation that is required in the surgical theatre. Donor graft delivery in the recipient eye has also been improved due to new products like pre-stripped and pre-loaded membranes...
July 21, 2017: Survey of Ophthalmology
https://www.readbyqxmd.com/read/28738561/silver-triangular-nanoplates-as-an-high-efficiently-fret-donor-acceptor-of-upconversion-nanoparticles-for-ultrasensitive-turn-on-off-protamine-and-trypsin-sensor
#10
Hongyu Chen, Aijin Fang, Youyu Zhang, Shouzhuo Yao
Silver triangular nanoplates (STNPs) as a high efficient fluorescence quenching reagent of upconversion nanoparticles (UCNPs) was used to constract a novel label-free fluorescence nanosensor for ultrasensitive detection of protamine and trypsin based on fluorescence resonance energy transfer (FRET) between STNPs and UCNPs. In this assay, the negatively charged STNPs can bind with positively charged UCNPs through electrostatic interaction, and then quenched the fluorescence of UCNPs. When protamine was added to the mixture of UCNPs-STNPs, the STNPs interacted with protamine and then detached from the surface of UCNPs and aggregated, which result in the recovery of the fluorescence of UCNPs...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738239/delayed-graft-duodenal-perforation-due-to-impacted-food-five-years-after-simultaneous-pancreas-kidney-transplantation-a-case-report
#11
Taizo Sakata, Hideki Katagiri, Tadao Kubota, Takashi Sakamoto, Kentaro Yoshikawa, Alan Kawarai Lefor, Cheol Woong Jung, Toru Kojima
INTRODUCTION: Pancreas transplantation is the best treatment option in selected patients with type 1 diabetes mellitus. Here we report a patient with a nonmarginal duodenal perforation five years after a simultaneous pancreas-living donor kidney transplantation (SPLKT). PRESENTATION OF CASE: A 31-year old male who underwent SPLKT five years previously presented with severe abdominal pain. He had a marginal duodenal perforation four years later, treated by primary closure and drainage...
July 14, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28737658/regulation-of-clinical-xenotransplantation-time-for-a-reappraisal
#12
David K C Cooper, Richard N Pierson, Bernhard J Hering, Muhammad M Mohiuddin, Jay A Fishman, Joachim Denner, Curie Ahn, Agnes M Azimzadeh, Leo H Buhler, Peter J Cowan, Wayne J Hawthorne, Takaaki Kobayashi, David H Sachs
The continual critical shortage of organs and cells from deceased human donors has stimulated research in the field of cross-species transplantation (xenotransplantation), with the pig selected as the most suitable potential source of organs. Since the US Food and Drug Administration concluded a comprehensive review of xenotransplantation in 2003, considerable progress has been made in the experimental laboratory to improve cell and organ xenograft survival in several pig-to-nonhuman primate systems that offer the best available models to predict clinical outcomes...
August 2017: Transplantation
https://www.readbyqxmd.com/read/28737377/carbon-dot-based-naphthalimide-coupled-fret-pair-for-highly-selective-ratiometric-detection-of-thioredoxin-reductase-and-cancer-screening
#13
Jagpreet Singh Sidhu, Ashutosh Singh, Neha Garg, Narinder Singh
The Fluorescence resonance energy transfer (FRET) mechanism has been established between the carbon dots (CDs) and naphthalimide to monitor the activity of thioredoxin reductase (TrxR), which is often overexpressed in many cancer cells. The naphthalimide moiety was covalently attached to the surface of CDs through a disulfide linkage. In the normal cell conditions (when devoid of high concentrations of TrxR), the CDs act as an energy donor and naphthalimide acts as an acceptor, which establishes the FRET pair as interpreted from the emission at λem =565 nm, when excited at λex =360 nm...
July 24, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28736606/mandibular-bone-regeneration-after-bone-slat-technique
#14
Salvatore D'Amato, Gianpaolo Tartaro, Angelo Itro, Mario Santagata
BACKGROUND: The reconstruction of alveolar ridges for implant placement is still a challenging surgical procedure, especially in the case of extensive vertical and horizontal bone atrophy. OBJECTIVE: The objective of the present study was to evaluate the quantity and quality of newly regenerated bone; clinically by means of direct clinical measuring, ridges augmented by autogenous cortical bone associated with autogenous particulate bone graft in the posterior lower jaw defect...
January 2017: Annali di Stomatologia
https://www.readbyqxmd.com/read/28736018/extracorporeal-life-support-as-a-bridge-to-lung-transplantation-in-patients-with-acute-respiratory-failure
#15
H J Yeo, S Lee, S H Yoon, S E Lee, W H Cho, D Jeon, Y S Kim, D Kim
BACKGROUND: Extracorporeal membrane oxygenation (ECMO) is being used more often as a bridge to transplantation (BTT) in patients with acutely decompensated end-stage lung disease in Korea. ECMO as a BTT may be the only rescue strategy for severe acute respiratory failure, but many centers still consider it to be a relative contraindication to lung transplantation because of its poor outcome. Because there are not enough lung donors, it is important to determine their optimal use. We reviewed and analyzed our experiences with the use of ECMO as a BTT in patients with acute respiratory failure...
July 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28736013/outcomes-of-highly-sensitized-patients-undergoing-simultaneous-liver-and-kidney-transplantation-a-single-center-experience-with-desensitization
#16
J A Steggerda, A Kang, S-H Pan, V Sundaram, N N Nissen, A S Klein, T Todo, A Annamalai, A Vo, S C Jordan, I K Kim
BACKGROUND: Preformed donor-specific human leukocyte antigen antibodies (DSAs) in patients undergoing simultaneous liver and kidney transplantation (SLKT) are an independent risk factor for poorer patient and renal allograft survival. The outcomes of patients highly sensitized (HS) against HLA antigens undergoing SLKT and select HS SLKT recipients undergoing desensitization at a high-volume desensitization center were investigated. METHODS: Seventy-five patients undergoing SLKT at a high-volume desensitization center between January 1, 2001, and December 31, 2015, were retrospectively reviewed...
July 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28736011/pediatric-donor-to-adult-recipients-in-donation-after-cardiac-death-liver-transplantation-a-single-center-experience
#17
C Lan, J L Song, L N Yan, J Y Yang, T F Wen, B Li, M Q Xu
BACKGROUND: The impact of using liver allografts from donors who are younger than 14 years at the time of donation after cardiac death (DCD) liver transplantation in terms of early allograft dysfunction (EAD) and graft survival is undefined. To determine if adults undergoing DCD liver transplantation who receive a graft from a donor age younger than or equal to 13 years have similar outcomes to recipients of organs from older than 18-year-old donors. METHODS: Records from adult patients undergoing DCD liver transplantation between March 2012 and December 2015 who received whole grafts from donors after cardiac death were reviewed...
July 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28735986/challenges-for-the-travelling-donor-variability-between-donor-workup-and-donor-surgery-in-the-canadian-kidney-paired-exchange-program
#18
B A Reikie, T Kroczak, T B McGregor
BACKGROUND: A primary obstacle to providing renal transplantation is limited access to donated kidneys. The living-donor pool for renal allografts was greatly expanded through implementation of a kidney paired donation program. Whereas some programs ship donor kidneys to the site of renal transplantation, others send the donor to the site of transplantation. Performing the nephrectomy and transplantation at the same location may optimize functional renal outcomes, but preferred surgical approaches may differ between surgical teams performing the donor workup and donor surgery...
July 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28735982/a-standardized-donor-designation-ratio-to-assess-the-performance-of-driver-s-license-agencies
#19
N K R Sehgal, C Sullivan, M Figueroa, J A Pencak, D Einstadter, J D Thornton
Evaluating Department of Motor Vehicles (DMV) locations based on the percent of patrons who register as donors does not account for individual characteristics that may influence willingness to donate. We reviewed the driver's licenses of 2997 randomly selected patients at an urban medical system to obtain donor designation, age, gender, and DMV location and linked patient addresses with census tract data on race, ethnicity, income, and education. We then developed a Standardized Donor Designation Ratio (SDDR) (ie, the observed number of donors at each DMV divided by the expected number of donors based on patient demographic characteristics)...
July 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28734130/right-lobe-living-donors-ages-55-and-older-in-liver-transplantation
#20
Seong Hoon Kim, Eung Chang Lee, Jae Ryong Shim, Sang Jae Park
Insufficient is the evidence for safe use of elderly donors in adult-to-adult living donor liver transplantation (LDLT). The aim of this study was to evaluate the outcomes of right lobe LDLT by donor age (≥55 vs. <55 years). All living donors who underwent right hepatectomy at the authors' institution between March 2008 and December 2015 were divided into 2 groups: group A with an age ≥ 55 and group B with an age < 55. The selection criteria for elderly donor were preservation of middle hepatic vein, remnant liver volume ≥30%, and no or mild fatty liver...
July 22, 2017: Liver Transplantation
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