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https://www.readbyqxmd.com/read/28823033/the-combination-of-mitomycin-induced-blood-cells-with-a-temporary-treatment-of-ciclosporin-a-prolongs-allograft-survival-in-vascularized-composite-allotransplantation
#1
Christian Andreas Radu, Sebastian Fischer, Yannick Diehm, Otto Hetzel, Florian Neubrech, Laura Dittmar, Christian Kleist, Martha Maria Gebhard, Peter Terness, Ulrich Kneser, Jurij Kiefer
BACKGROUND: Vascularized composite allotransplantation (VCA) is a rapidly expanding field of transplantation and provides a potential treatment for complex tissue defects. Peripheral blood mononuclear cells (PBMCs) shortly incubated with the antibiotic and chemotherapeutic agent mitomycin C (MMC) can suppress allogeneic T cell response and control allograft rejection in various organ transplantation models. MMC-incubated PBMCs (MICs) are currently being tested in a phase I clinical trial in kidney transplant patients...
August 19, 2017: Langenbeck's Archives of Surgery
https://www.readbyqxmd.com/read/28822746/outcomes-of-early-adolescent-donor-hearts-in-adult-transplant-recipients
#2
Shivank Madan, Snehal R Patel, Peter Vlismas, Omar Saeed, Sandhya Murthy, Stephen Forest, William Jakobleff, Daniel Sims, Jacqueline M Lamour, Daphne T Hsu, Julia Shin, Daniel Goldstein, Ulrich P Jorde
OBJECTIVES: This study sought to determine outcomes of adult recipients of early adolescent (EA) (10 to 14 years) donor hearts. BACKGROUND: Despite a shortage of donor organs, EA donor hearts (not used for pediatric patients) are seldom used for adults because of theoretical concerns for lack of hormonal activation and changes in left ventricular mass. Nonetheless, the outcomes of adult transplantation using EA donor hearts are not clearly established. METHODS: All adult (≥18 years of age) heart transplant recipients in the United Network for Organ Sharing database between April 1994 and September 2015 were eligible for this analysis...
August 3, 2017: JACC. Heart Failure
https://www.readbyqxmd.com/read/28822390/physiologic-features-of-brain-death
#3
Eno-Obong Essien, Kristina Fioretti, Thomas M Scalea, Deborah M Stein
Brain death is known to be associated with physiologic derangements but their incidence is poorly described. Knowledge of the changes that occur during brain death is important for management of the potential organ donor. Thus, we sought to characterize the pathophysiology that occurs during brain death in patients with traumatic injuries. All brain-dead patients over a 10-year period were identified from the trauma registry at a level 1 urban trauma center. Patient demographics, injury characteristics, and clinical data for defining organ dysfunction were reviewed for the 24 hours surrounding brain-death declaration...
August 1, 2017: American Surgeon
https://www.readbyqxmd.com/read/28819637/cigarette-smoking-and-its-hazards-in-kidney-transplantation
#4
REVIEW
Muhammad Abdul Mabood Khalil, Jackson Tan, Said Khamis, Muhammad AshhadUllah Khalil, Rabeea Azmat, Arslan Rahat Ullah
Cigarette smoking affects many organs. It causes vasoconstriction through activation of sympathetic nervous system which leads to elevation of blood pressure and reduction in glomerular filtration rate and filtration pressure. It also causes thickening of renal arterioles. Cigarette smoking increases the risk of microalbuminuria and accelerates progression of microalbuminuria to macroalbuminuria. Furthermore, it causes rapid loss of glomerular filtration rate in chronic kidney disease patients. After kidney donation, these factors may be injurious to the solitary kidney...
2017: Advances in Medicine
https://www.readbyqxmd.com/read/28819520/the-ban-on-blood-donation-on-men-who-have-sex-with-men-time-to-rethink-and-reassess-an-outdated-policy
#5
Georgios Karamitros, Nikolaos Kitsos, Ioanna Karamitrou
During the 1980s the HIV/AIDS epidemic outbreak occurred. Due to the high prevalence of the disease on men who had sex with men (MSM) a lifetime ban on blood donations on men who had sex with men (MSM) was implemented. In the recent years, organizations like the European Union (EU) and the World Health Organization (WHO) have established new guidelines introducing the term of "risky sexual behavior" without any reference to the sex orientation of the potential donor, however many countries are hesitant to review the ban on men who had sex with men (MSM)...
2017: Pan African Medical Journal
https://www.readbyqxmd.com/read/28819147/nitrogen-starvation-impacts-the-photosynthetic-performance-of-porphyridium-cruentum-as-revealed-by-chlorophyll-a-fluorescence
#6
Long-Sheng Zhao, Kang Li, Qian-Min Wang, Xiao-Yan Song, Hai-Nan Su, Bin-Bin Xie, Xi-Ying Zhang, Feng Huang, Xiu-Lan Chen, Bai-Cheng Zhou, Yu-Zhong Zhang
Nitrogen is one of the most important nutrients needed for plants and algae to survive, and the photosynthetic ability of algae is related to nitrogen abundance. Red algae are unique photosynthetic eukaryotic organisms in the evolution of algae, as they contain phycobilisomes (PBSs) on their thylakoid membranes. In this report, the in vivo chlorophyll (Chl) a fluorescence kinetics of nitrogen-starved Porphyridium cruentum were analyzed to determine the effects of nitrogen deficiency on photosynthetic performance using a multi-color pulse amplitude modulation (PAM) chlorophyll fluorometer...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28817400/liver-xenotransplantation
#7
Madhukar S Patel, Nathan Louras, Parsia A Vagefi
PURPOSE OF REVIEW: There continues to be an inadequate organ supply and lack of effective temporary support, for patients with liver failure. The purpose of this review is to discuss recent progress in the field of orthotopic pig-to-nonhuman primate (NHP) liver xenotransplantation (LXT). RECENT FINDINGS: From 1968 to 2012, survival in pig-to-NHP LXT was limited to 9 days, initially due to hyperacute rejection which has been ameliorated through use of genetically engineered donor organs, but ultimately because of profound thrombocytopenia, thrombotic microangiopathy, and bleeding...
August 16, 2017: Current Opinion in Organ Transplantation
https://www.readbyqxmd.com/read/28817282/tnf-induced-switching-of-columnar-rectangular-to-hexagonal-assemblies-in-a-new-class-of-triphenylene-based-room-temperature-discotic-liquid-crystals
#8
Monika Gupta, Santosh Prasad Gupta, Santanu Kumar Pal
A straightforward synthesis of triphenylene-based oligomeric systems that self-organize into room temperature columnar structures is presented. The compounds with longer spacer length (m = 10 and 12) exhibit columnar rectangular (Colr) mesophase whereas the compound with m = 8 exists in glassy Colr state. Interestingly, the Colr self-assembly of these compounds switches to columnar hexagonal (Colh) on doping the compounds with 2, 4, 7-trinitrofluorenone (TNF). For the dopant concentration of 1:1 with respect to native compound, an intermediate transition state between Colr and Colh phase was observed which completely transformed into the hexagonal phase on increasing the concentration to 1:2 (compound: TNF) and afterwards...
August 17, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28815915/synthesis-and-characterization-of-iridium-v-coordination-complexes-with-an-n-o-donor-organic-ligand
#9
Liam Sharninghausen, Shashi Bhushan Sinha, Dimitar Y Shopov, Brandon Q Mercado, David Balcells, Gary W Brudvig, Robert H Crabtree
We have prepared and fully characterized two isomers of [IrIV(dpyp)2] (dpyp = meso-2,4-di(2-pyridynyl)-2,4-pentanediolate). These complexes can be cleanly oxidized to [IrV(dpyp)2]+, which to our knowledge represent the first coordination complexes of Ir(V) in an N,O-donor environment. One isomer has been fully characterized in the Ir(V) state, including by x-ray crystallography, XPS, and DFT calculations, all of which support metal-centered oxidation. The unprecedented stability of these Ir(V) complexes is ascribed to the exceptional donor strength of the ligands, their resistance to oxidative degradation, and the presence of four highly donor alkoxide groups in a plane, which breaks the degeneracy of the d-orbitals and favors oxidation...
August 16, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28815492/building-cre-knockin-rat-lines-using-crispr-cas9
#10
Yuanwu Ma, Lianfeng Zhang, Xingxu Huang
Conditional gene inactivation strategy helps researchers to study the gene functions that are critical in embryogenesis or in defined tissues of adulthood. The Cre/loxP system is widely used for conditional gene inactivation/activation in cells or organisms. Cre knockin animal lines are essential for gene expression or inactivation in a spatially and temporally restricted manner. However, to generate a Cre knockin line by traditional approach is laborious. Recently, the clustered regularly interspaced short palindromic repeats and CRISPR-associated protein 9 (CRISPR/Cas9) has been proven as a simple and efficient genome-editing tool...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28815237/induced-polarization-restricts-the-conformational-distribution-of-a-light-harvesting-molecular-triad-in-the-ground-state
#11
Oleg N Starovoytov, Pengzhi Zhang, Piotr Cieplak, Margaret S Cheung
The light-harvesting molecular triad consisting of carotenoid polyene (C), diaryl-porphyrin (P) and pyrrole-fullerene (C60) is a donor-acceptor molecule capable of absorbing incident light in the visible range. Its ability to convert solar energy to electrical excitation and charge separation energy suggests a great potential in real-world applications. The ensemble of its conformations under ambient conditions varies widely according to its electronic state. In previous work, we applied a non-polarizable model to study the conformational distribution of the molecular triad in the ground and charge separated states...
August 17, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28814761/transplantation-of-bioengineered-rat-lungs-recellularized-with-endothelial-and-adipose-derived-stromal-cells
#12
Ryoichiro Doi, Tomoshi Tsuchiya, Norisato Mitsutake, Satoshi Nishimura, Mutsumi Matsuu-Matsuyama, Yuka Nakazawa, Tomoo Ogi, Sadanori Akita, Hiroshi Yukawa, Yoshinobu Baba, Naoya Yamasaki, Keitaro Matsumoto, Takuro Miyazaki, Ryotaro Kamohara, Go Hatachi, Hideyori Sengyoku, Hironosuke Watanabe, Tomohiro Obata, Laura E Niklason, Takeshi Nagayasu
Bioengineered lungs consisting of a decellularized lung scaffold that is repopulated with a patient's own cells could provide desperately needed donor organs in the future. This approach has been tested in rats, and has been partially explored in porcine and human lungs. However, existing bioengineered lungs are fragile, in part because of their immature vascular structure. Herein, we report the application of adipose-derived stem/stromal cells (ASCs) for engineering the pulmonary vasculature in a decellularized rat lung scaffold...
August 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28814758/targeted-insertion-of-an-anti-cd2-monoclonal-antibody-transgene-into-the-ggta1-locus-in-pigs-using-foki-dcas9
#13
Mark B Nottle, Evelyn J Salvaris, Nella Fisicaro, Stephen McIlfatrick, Ivan Vassiliev, Wayne J Hawthorne, Philip J O'Connell, Jamie L Brady, Andrew M Lew, Peter J Cowan
Xenotransplantation from pigs has been advocated as a solution to the perennial shortage of donated human organs and tissues. CRISPR/Cas9 has facilitated the silencing of genes in donor pigs that contribute to xenograft rejection. However, the generation of modified pigs using second-generation nucleases with much lower off-target mutation rates than Cas9, such as FokI-dCas9, has not been reported. Furthermore, there have been no reports on the use of CRISPR to knock protective transgenes into detrimental porcine genes...
August 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28814630/inverted-region-electron-transfer-as-a-mechanism-for-enhancing-photosynthetic-solar-energy-conversion-efficiency
#14
Hiroki Makita, Gary Hastings
In all photosynthetic organisms, light energy is used to drive electrons from a donor chlorophyll species via a series of acceptors across a biological membrane. These light-induced electron-transfer processes display a remarkably high quantum efficiency, indicating a near-complete inhibition of unproductive charge recombination reactions. It has been suggested that unproductive charge recombination could be inhibited if the reaction occurs in the so-called inverted region. However, inverted-region electron transfer has never been demonstrated in any native photosynthetic system...
August 16, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28814507/systematic-gene-tagging-using-crispr-cas9-in-human-stem-cells-to-illuminate-cell-organization
#15
Brock Roberts, Amanda Haupt, Andrew Tucker, Tanya Grancharova, Joy Arakaki, Margaret A Fuqua, Angelique Nelson, Caroline Hookway, Susan A Ludmann, Irina A Mueller, Ruian Yang, Alan R Horwitz, Susanne M Rafelski, Ruwanthi N Gunawardane
We present a CRISPR/Cas9 genome editing strategy to systematically tag endogenous proteins with fluorescent tags in human induced pluripotent stem cells. To date we have generated multiple human iPSC lines with monoallelic GFP tags labeling 10 proteins representing major cellular structures. The tagged proteins include alpha tubulin, beta actin, desmoplakin, fibrillarin, nuclear lamin B1, non-muscle myosin heavy chain IIB, paxillin, Sec61 beta, tight junction protein ZO1, and Tom20. Our genome editing methodology using Cas9/crRNA ribonuclear protein and donor plasmid co-electroporation, followed by fluorescence-based enrichment of edited cells, typically resulted in <0...
August 16, 2017: Molecular Biology of the Cell
https://www.readbyqxmd.com/read/28814284/effect-of-poly-hexamethylene-biguanide-hydrochloride-phmb-treated-non-sterile-medical-gloves-upon-the-transmission-of-streptococcus-pyogenes-carbapenem-resistant-e-coli-mrsa-and-klebsiella-pneumoniae-from-contact-surfaces
#16
S Ali, A P R Wilson
BACKGROUND: Reduction of accidental contamination of the near-patient environment has potential to reduce acquisition of healthcare-associated infection(s). Although medical gloves should be removed when soiled or touching the environment, compliance is variable. The use of antimicrobial-impregnated medical gloves could reduce the horizontal-transfer of bacterial contamination between surfaces. AIM: Determine the activity of antimicrobial-impregnated gloves against common hospital pathogens: Streptococcus pyogenes, carbapenem-resistant E...
August 17, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28812869/entry-inhibitors-a-perspective-for-prevention-of-hepatitis-c-virus-infection-in-organ-transplantation
#17
Che C Colpitts, Raymond T Chung, Thomas F Baumert
Entry inhibitors are emerging as an attractive class of therapeutics for hepatitis C virus (HCV) infection. Entry inhibitors target either virion-associated factors or cellular factors necessary for infection. By blocking entry into cells, entry inhibitors prevent both the establishment of persistent reservoirs and the emergence of resistant variants during viral replication. Furthermore, entry inhibitors protect naïve cells from virus-induced alterations. Combining entry inhibitors with direct-acting antivirals (DAAs) may therefore improve treatment outcomes, particularly in the context of organ transplantation...
August 16, 2017: ACS Infectious Diseases
https://www.readbyqxmd.com/read/28811074/management-of-multidrug-resistant-gram-negative-bacilli-infections-in-solid-organ-transplant-recipients-set-gesitra-seimc-reipi-recommendations
#18
REVIEW
J M Aguado, J T Silva, M Fernández-Ruiz, E Cordero, J Fortún, C Gudiol, L Martínez-Martínez, E Vidal, L Almenar, B Almirante, R Cantón, J Carratalá, J J Caston, E Cercenado, C Cervera, J M Cisneros, M G Crespo-Leiro, V Cuervas-Mons, J Elizalde-Fernández, M C Fariñas, J Gavaldà, M J Goyanes, B Gutiérrez-Gutiérrez, D Hernández, O Len, R López-Andujar, F López-Medrano, P Martín-Dávila, M Montejo, A Moreno, A Oliver, A Pascual, E Pérez-Nadales, A Román-Broto, R San-Juan, D Serón, A Solé-Jover, M Valerio, P Muñoz, J Torre-Cisneros
Solid organ transplant (SOT) recipients are especially at risk of developing infections by multidrug resistant (MDR) Gram-negative bacilli (GNB), as they are frequently exposed to antibiotics and the healthcare setting, and are regulary subject to invasive procedures. Nevertheless, no recommendations concerning prevention and treatment are available. A panel of experts revised the available evidence; this document summarizes their recommendations: (1) it is important to characterize the isolate's phenotypic and genotypic resistance profile; (2) overall, donor colonization should not constitute a contraindication to transplantation, although active infected kidney and lung grafts should be avoided; (3) recipient colonization is associated with an increased risk of infection, but is not a contraindication to transplantation; (4) different surgical prophylaxis regimens are not recommended for patients colonized with carbapenem-resistant GNB; (5) timely detection of carriers, contact isolation precautions, hand hygiene compliance and antibiotic control policies are important preventive measures; (6) there is not sufficient data to recommend intestinal decolonization; (7) colonized lung transplant recipients could benefit from prophylactic inhaled antibiotics, specially for Pseudomonas aeruginosa; (8) colonized SOT recipients should receive an empirical treatment which includes active antibiotics, and directed therapy should be adjusted according to susceptibility study results and the severity of the infection...
July 26, 2017: Transplantation Reviews
https://www.readbyqxmd.com/read/28810723/graft-survival-of-pediatric-kidney-transplant-recipients-selected-for-de-novo-steroid-avoidance-a-propensity-score-matched-study
#19
Edward J Nehus, Chunyan Liu, Bo Lu, Maurizio Macaluso, Mi-Ok Kim
Background: Steroid-avoidance protocols have gained popularity in pediatric kidney transplant recipients at low immunologic risk. The long-term safety of steroid avoidance in children with immunologic risk factors remains unknown. Methods: Pediatric kidney transplant recipients from 2004 to 2014 in the Organ Procurement and Transplantation Network database who received tacrolimus and mycophenolate immunosuppression were investigated. Propensity score matching was used to compare graft survival in 1624 children who received steroid avoidance with 1624 children who received steroid-based immunosuppression...
August 1, 2017: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/28809971/construction-of-a-superior-visible-light-driven-photocatalyst-based-on-a-c3n4-active-centre-photoelectron-shift-platform-electron-withdrawing-unit-triadic-structure-covalent-organic-framework
#20
Sijing He, Qinfeng Rong, Hongyun Niu, Yaqi Cai
Herein, three functional factors inducing photocatalytic ability were artfully integrated into a covalent organic framework (COF), where triazine units served as photoactive centers, cyclic ketone units served as electron-withdrawing moieties, and the conjugated structure served as a photoelectron shift platform. This COF with segregated donor-acceptor alignments exhibits an excellent visible-light photocatalytic capacity for the decomposition of organic pollutants.
August 15, 2017: Chemical Communications: Chem Comm
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