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https://www.readbyqxmd.com/read/29055203/insight-into-the-heterogeneous-adsorption-of-humic-acid-fluorescent-components-on-multi-walled-carbon-nanotubes-by-excitation-emission-matrix-and-parallel-factor-analysis
#1
Chenghu Yang, Yangzhi Liu, Qiulin Cen, Yaxian Zhu, Yong Zhang
The heterogeneous adsorption behavior of commercial humic acid (HA) on pristine and functionalized multi-walled carbon nanotubes (MWCNTs) was investigated by fluorescence excitation-emission matrix and parallel factor (EEM- PARAFAC) analysis. The kinetics, isotherms, thermodynamics and mechanisms of adsorption of HA fluorescent components onto MWCNTs were the focus of the present study. Three humic-like fluorescent components were distinguished, including one carboxylic-like fluorophore C1 (λex/λem= (250, 310) nm/428nm), and two phenolic-like fluorophores, C2 (λex/λem= (300, 460) nm/552nm) and C3 (λex/λem= (270, 375) nm/520nm)...
October 18, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29055102/the-effect-of-clomiphene-citrate-on-endometrial-thickness-ovulation-pregnancy-and-live-birth-in-anovulatory-women-a-systematic-review-and-meta-analysis
#2
REVIEW
Moustafa A Gadalla, Shuo Huang, Rui Wang, Robert J Norman, Sayed A Abdullah, Ali M El Saman, Alaa M Ismail, Madelon van Wely, Ben W J Mol
OBJECTIVES: To compare the impact of clomiphene citrate (CC) versus other drug regimens on mid-cycle endometrial thickness (EMT), ovulation, pregnancy and live birth rates in women with WHO group II ovulatory disorders. METHODS: We searched MEDLINE, EMBASE, Scopus, Web of Science, The Cochrane Central Register of Clinical Trial (CENTRAL), and the non-MEDLINE subset of PubMed from inception to December 2016 and cross-checked references of relevant articles. We only included randomized controlled trials (RCTs) comparing CC used alone versus other drug regimens for ovulation induction in women with WHO group II anovulation...
October 21, 2017: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/29055097/sequencing-of-the-novel-hla-a-02-01-72-allele-in-a-chinese-hematopoietic-stem-cell-donor
#3
X Zhang, F-Q Lin, C Wu, B Zhang, J-P Li
HLA-A*02:01:72 has one synonymous nucleotide change from HLA-A*02:01:01:01 where 591 G is changed to A.
October 20, 2017: HLA
https://www.readbyqxmd.com/read/29055081/a-new-endoscopic-technique-to-close-big-nasal-septal-perforations-prospective-evaluation-of-the-double-meat-hook-technique-in-19-consecutive-cases
#4
H Dixon, F R Datema
Despite the variety of surgical techniques available to close big symptomatic septum perforations, closure rates of 30 to 70% indicate the difficulty of obtaining a good end result. The double meat hook technique is a new endoscopically assisted technique that delivers excellent visualization and control of mucosal flap elevation, extension and suturing. Mucosa from the nasal floor, lateral nasal wall and inferior turbinate bone are valuable donor site extensions. There is no need for additional incisions into the nasal septal mucosa in order to perform a tension-free closure...
October 21, 2017: Clinical Otolaryngology
https://www.readbyqxmd.com/read/29054943/non-infectious-aortitis-in-an-immunosuppressed-renal-transplant-recipient-with-iga-nephropathy
#5
Charlotte M Snead, Stephen C Crockett, Phillippa K Bailey
A 54-year-old woman presented with atypical chest pain, fever and malaise. She was immunosuppressed with three agents following a living-donor kidney transplant 1 year previously. Her native kidney failure was secondary to biopsy-demonstrated crescentic IgA nephropathy, with systemic involvement. A CT pulmonary angiogram revealed an inflammatory cuff of soft tissue around the descending thoracic aorta suggesting aortitis. Inflammatory markers were elevated. Given her immunosuppression, the patient was screened extensively for infective causes and was empirically commenced on intravenous meropenem...
October 19, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/29054876/the-canonical-biotin-synthesis-enzyme-8-amino-7-oxononanoate-synthase-biof-utilizes-different-acyl-chain-donors-in-bacillus-subtilis-and-escherichia-coli
#6
Miglena Manandhar, John E Cronan
BioF (8-amino-7-oxononanoate synthase) is a strictly conserved enzyme that catalyzes the first step in assembly of the fused heterocyclic rings of biotin. The BioF acyl chain donor has long been thought to be pimeloyl-CoA. Indeed, in vitro the Escherichia coli and Bacillus sphaericus enzymes have been shown to condense pimeloyl-CoA with L-alanine in a pyridoxal 5' -phosphate-dependent reaction with concomitant CoA release and decarboxylation of L-alanine. However, recent in vivo studies of E. coli and Bacillus subtilis suggested that the BioF proteins of the two bacteria could have different specificities for pimelate thioesters in that E...
October 20, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29054869/estimating-population-turnover-rates-from-relative-quantification-methods-reveals-microbial-dynamics-in-marine-sediment
#7
Richard Kevorkian, Jordan T Bird, Alexander Shumaker, Karen G Lloyd
Difficulty quantifying biogeochemically significant microbes in marine sediments limits our ability to assess interspecific interactions, population turnover times, and niches of uncultured taxa. We incubated surface sediments from Cape Lookout Bight, North Carolina USA, anoxically at 21°C for 122 days. Sulfate decreased until day 68, after which methane increased, with hydrogen concentration consistent with predicted values of an electron donor exerting thermodynamic control. We measured turnover times using two relative quantification methods, quantitative PCR (qPCR) and the product of 16S gene read abundance and total cell abundance (FRAxC, for fraction of read abundance times cells), to estimate population turnover rates of uncultured clades...
October 20, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29054843/contribution-of-extra-cardiac-cells-in-murine-heart-valves-is-age-dependent
#8
Lindsey J Anstine, Tori E Horne, Edwin M Horwitz, Joy Lincoln
BACKGROUND: Heart valves are dynamic structures that open and close over 100 000 times a day to maintain unidirectional blood flow during the cardiac cycle. Function is largely achieved by highly organized layers of extracellular matrix that provide the necessary biomechanical properties. Homeostasis of valve extracellular matrix is mediated by valve endothelial and interstitial cell populations, and although the embryonic origins of these cells are known, it is not clear how they are maintained after birth...
October 20, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/29054598/phlebotomus-papatasi-yellow-related-and-apyrase-salivary-proteins-are-candidates-for-vaccination-against-human-cutaneous-leishmaniasis
#9
Aymen Tlili, Soumaya Marzouki, Emna Chabaane, Maha Abdeladhim, Wafa Kammoun-Rebai, Rahma Sakkouhi, Nabil Belhadj Hmida, Fabiano Oliveira, Shaden Kamhawi, Hechmi Louzir, Jesus G Valenzuela, Melika Ben Ahmed
Nowadays, there is no available vaccine for human leishmaniasis. Animal experiments demonstrate that pre-exposure to sand fly saliva confers protection against leishmaniasis. Our preceding work in humans indicates that Phlebotomus (P) papatasi saliva, induce the production of IL-10 by CD8+ T lymphocytes. The neutralization of IL-10 enhanced the activation of a T cells CD4+ population producing IFN-γ. Herein, we used a biochemical and functional genomics approach to identify the sand fly salivary components that are responsible for the activation of the Th1 immune response in humans therefore constituting potential vaccine candidates against leishmaniasis...
October 17, 2017: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/29054369/exosome-is-a-mechanism-of-intercellular-drug-transfer-application-of-quantitative-pharmacology
#10
Jin Wang, Bertrand Z Yeung, Minjian Cui, Cody J Peer, Ze Lu, William D Figg, M Guillaume Wientjes, Sukyung Woo, Jessie L-S Au
PURPOSE: Exosomes are small membrane vesicles (30-100nm in diameter) secreted by cells into extracellular space. The present study evaluated the effect of chemotherapeutic agents on exosome production and/or release, and quantified the contribution of exosomes to intercellular drug transfer and pharmacodynamics. METHODS: Human cancer cells (breast MCF7, breast-to-lung metastatic LM2, ovarian A2780 and OVCAR4) were treated with paclitaxel (PTX, 2-1000nM) or doxorubicin (DOX, 20-1000nM) for 24-48h...
October 17, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/29054354/strategies-to-reduce-ischemia-reperfusion-injury-in-vascularized-composite-allotransplantation-of-the-limb
#11
REVIEW
Kavit R Amin, Jason K F Wong, James E Fildes
An important and often underinvestigated contributor to solid organ transplant rejection is ischemia reperfusion injury. This pathophysiological response releases damaging reactive oxygen species and cell stress signals that initiate inflammation, which has a critical role in priming the immune system for allorecognition. In time, this renders graft dysfunction and how this response is mediated in composite tissues remains unknown. Current protocols are drawn from solid organ transplantation with little scientific basis as to how this informs current hand transplantation practices...
October 18, 2017: Journal of Hand Surgery
https://www.readbyqxmd.com/read/29054234/coronary-dissection-discovered-during-ex%C3%A2-vivo-organ-preservation-avoiding-a%C3%A2-fatal-complication
#12
Sandro Sponga, Dave Napgal, Antonio Paolo Beltrami, Veronica Ferrara, Sandro Nalon, Nicoletta Finato, Ugolino Livi
This report describes the case of undiagnosed posttraumatic coronary artery dissection in a young multiorgan donor. Ex vivo preservation with the Organ Care System (TransMedics, Inc, Andover, MA) revealed the presence of coronary disease and avoided transplantation of an organ at high risk for failure.
November 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/29054231/lung-procurement-after-cardiac-death-in-a-donor-with-previous-median-sternotomy
#13
Chitaru Kurihara, Masashi Kawabori, Masahiro Ono, Syed T Hussain, Amit D Parulekar, Jeffrey A Morgan, Gabriel Loor
The shortage of lungs for organ donation is problematic, and meeting the demand by expanding the donor pool in lung transplantation is critical. Donation after cardiac death (DCD) is an under-used approach that could be a valuable source of organs. However, procuring lungs from donors with a previous median sternotomy is technically difficult and is usually avoided. Here, we describe the procurement of lungs from a DCD patient with a previous median sternotomy.
November 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/29053932/the-patterns-of-in-vitro-cell-death-and-inflammatory-cytokines-induced-by-distinct-bcg-vaccine-strains-are-differentially-induced-in-human-mononuclear-cells
#14
C Ponte, M Hacker, M Moraes, L Castello-Branco, F Silva, P Antas
Tuberculosis (TB) remains among the world's leading cause of mortality. For its control, studies of TB vaccines are needed. Since live-attenuated Mycobacterium bovis bacillus Calmette-Guérin (BCG) is the only TB vaccine currently in use, studies on the protective role of BCG are required. In this study, we analyzed host cells purified directly from whole blood of human immunodeficiency virus (HIV)-negative volunteers, comprising adult healthy donors (HD) and neonates (umbilical cord bloods, UCB), with the aim to directly compare in vitro immune responses with distinct BCG strains in human mononuclear cells...
October 20, 2017: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/29053910/a-simplified-protocol-using-rituximab-and-immunoglobulin-for-abo-incompatible-low-titer-living-donor-liver-transplantation
#15
Seong Hoon Kim, Eung Chang Lee, Jae Ryong Shim, Sang Jae Park
BACKGROUND & AIMS: No consensus has been reached regarding optimal treatment strategies for ABO-incompatible (ABO-I) living donor liver transplantation (LDLT). We introduce a simplified protocol using rituximab and intravenous immunoglobulin (IVIG). METHODS: Data were analyzed on adult patients who underwent ABO-I LDLT of which protocol added rituximab (300 mg/m(2) ) before surgery and IVIG (0.8 g/kg) on postoperative days 1 and 4 to the conventional immunosuppressive regimen used in ABO-compatible (ABO-C) LDLT, without plasmapheresis, splenectomy, or graft local infusion...
October 20, 2017: Liver International: Official Journal of the International Association for the Study of the Liver
https://www.readbyqxmd.com/read/29053854/dietary-betaine-supplementation-increases-adrenal-expression-of-steroidogenic-acute-regulatory-protein-and-yolk-deposition-of-corticosterone-in-laying-hens
#16
Halima Abobaker, Yun Hu, Zhen Hou, Qinwei Sun, Abdulrahman A Idriss, Nagmeldin A Omer, Yibo Zong, Ruqian Zhao
Betaine, an important methyl donor, is known to execute epigenetic regulation of gene expression via nutritional reprogramming. Herein, we explore whether feeding a betaine-supplemented diet to laying hens would affect corticosteroid biosynthesis in the adrenal gland and corticosterone deposition in eggs, in correlation with the expression of methyl transfer enzymes and the promoter DNA methylation status of affected genes. Rugao yellow-feathered laying hens at 38 weeks of age were assigned to Control and Betaine groups, fed basal and betaine-supplemented diets, respectively, for four weeks...
September 20, 2017: Poultry Science
https://www.readbyqxmd.com/read/29053642/allelic-expression-imbalance-in-the-human-retinal-transcriptome-and-potential-impact-on-inherited-retinal-diseases
#17
Pablo Llavona, Michele Pinelli, Margherita Mutarelli, Veer Singh Marwah, Simone Schimpf-Linzenbold, Sebastian Thaler, Efdal Yoeruek, Jan Vetter, Susanne Kohl, Bernd Wissinger
Inherited retinal diseases (IRDs) are often associated with variable clinical expressivity (VE) and incomplete penetrance (IP). Underlying mechanisms may include environmental, epigenetic, and genetic factors. Cis-acting expression quantitative trait loci (cis-eQTLs) can be implicated in the regulation of genes by favoring or hampering the expression of one allele over the other. Thus, the presence of such loci elicits allelic expression imbalance (AEI) that can be traced by massive parallel sequencing techniques...
October 20, 2017: Genes
https://www.readbyqxmd.com/read/29053533/use-of-a-single-anatomic-donor-site-for-harvesting-a-full-thickness-skin-graft-and-a-free-cartilage-graft-for-nasal-defects
#18
Jessica Olander, Melanie Wong, Mariah Brown
No abstract text is available yet for this article.
October 19, 2017: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/29053469/core-to-shell-switching-of-the-conduction-channel-on-sno2-nanowire-sensors
#19
J T Holguín-Momaca, F Espinosa-Magaña, W Antúnez-Flores, S F Olive-Méndez
A sensor based on random connections of single-crystalline SnO2 nanowires (NWs) has been fabricated for ethanol detection. The NW length of ∼10 μm leads to the formation of several random node connections between the Ag electrodes. The samples were subjected to thermal treatments under a reducing atmosphere of H2/Ar, to generate oxygen vacancies at the surface of the NWs. As a result, the core conduction channel of the NWs, where the conduction is based on electron hopping through the potential barriers at the contact nodes, switch to the surface of the NWs by the creation of an impurity band of shallow donors located at 0...
October 20, 2017: Nanotechnology
https://www.readbyqxmd.com/read/29053080/aerosolizing-lipid-dispersions-enables-antibiotic-transport-across-mimics-of-the-lung-airway-surface-even-in-the-presence-of-pre-existing-lipid-monolayers
#20
Steven V Iasella, Amy Z Stetten, Timothy E Corcoran, Stephen Garoff, Todd M Przybycien, Robert D Tilton
BACKGROUND: Secondary lung infections are the primary cause of morbidity associated with cystic fibrosis lung disease. Aerosolized antibiotic inhalation is potentially advantageous but has limited effectiveness due to altered airway aerodynamics and deposition patterns that limit drug access to infected regions. One potential strategy to better reach infected areas is to formulate aerosols with surfactants that induce surface tension gradients and drive postdeposition drug dispersal via Marangoni transport along the airway surface liquid (ASL)...
October 20, 2017: Journal of Aerosol Medicine and Pulmonary Drug Delivery
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