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https://www.readbyqxmd.com/read/28340245/unacceptable-human-leucocyte-antigens-for-organ-offers-in-the-era-of-organ-shortage-influence-on-waiting-time-before-kidney-transplantation
#1
Malte Ziemann, Nicole Heßler, Inke R König, Nils Lachmann, Andrea Dick, Vanessa Ditt, Klemens Budde, Petra Reinke, Ute Eisenberger, Barbara Suwelack, Thomas Klein, Timm H Westhoff, Wolfgang Arns, Katrin Ivens, Antje Habicht, Lutz Renders, Dirk Stippel, Dominik Bös, Florian Sommer, Siegfried Görg, Martin Nitschke, Thorsten Feldkamp, Falko M Heinemann, Reinhard Kelsch
Background.: The assignment of human leucocyte antigens (HLAs) against which antibodies are detected as unacceptable antigens (UAGs) avoids allocation of HLA- incompatible allografts. There is uncertainty as to what extent UAGs decrease the probability of receiving a kidney offer. Methods.: Kidney transplantations in 3264 patients on the waiting lists of six German transplant centres were evaluated for a period of at least 2 years. The proportion of excluded offers due to UAGs was calculated as virtual panel-reactive antibodies (vPRAs)...
March 15, 2017: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/28339553/de-and-recellularization-of-the-pig-uterus-a-bioengineering-pilot-study%C3%A2
#2
Hannes Campo, Pedro M Baptista, Nuria López-Pérez, Amparo Faus, Irene Cervelló, Carlos Simón
Absolute uterine factor infertility, or the absence of a functional uterus, has a prevalence of 3%-5% in the general population. Despite the great strides being made in reproductive medicine, patients diagnosed with absolute uterine factor infertility remain untreatable. The only available solution has been gestational surrogacy, but recently the Brannström group presented a viable alternative by reporting the first successful live birth after uterus transplantation. Similar to other transplantations, this approach has inherent limitations such as the paucity of donor organs and the need for long-term immunosuppression...
December 27, 2016: Biology of Reproduction
https://www.readbyqxmd.com/read/28338458/hepatitis-b-in-solid-organ-transplant-procedures-other-than-liver
#3
Dina Halegoua-De Marzio, Jonathan M Fenkel, Cataldo Doria
Transplant is often the best treatment available for patients with end-stage organ failure. Hepatitis B virus infection in transplant procedures other than liver is a major concern because it can be a significant cause of morbidity and mortality after transplant. Due to the increased risk of hepatic complications, such as fibrosing cholestatic hepatitis or histologic deterioration after transplant, systematic use of nucleoside or nucleotide analogues shortly before or at the time of transplant is recommended (tenofovir or entecavir are preferable to lamivudine) in all patients, whatever the baseline histologic evaluation...
April 2017: Experimental and Clinical Transplantation
https://www.readbyqxmd.com/read/28337272/cold-preservation-with-hyperbranched-polyglycerol-based-solution-improves-kidney-functional-recovery-with-less-injury-at-reperfusion-in-rats
#4
Shadan Li, Bin Liu, Qiunong Guan, Irina Chafeeva, Donald E Brooks, Christopher Yc Nguan, Jayachandran N Kizhakkedathu, Caigan Du
Minimizing donor organ injury during cold preservation (including cold perfusion and storage) is the first step to prevent transplant failure. We recently reported the advantages of hyperbranched polyglycerol (HPG) as a novel substitute for hydroxyethyl starch in UW solution for both cold heart preservation and cold kidney perfusion. This study evaluated the functional recovery of the kidney at reperfusion after cold preservation with HPG solution. The impact of HPG solution compared to conventional UW and HTK solutions on tissue weight and cell survival at 4°C was examined using rat kidney tissues and cultured human umbilical vein endothelial cells (HUVECs), respectively...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/28336748/the-sweet-side-of-ampk-signaling-regulation-of-gfat1
#5
John W Scott, Jonathan S Oakhill
Maintaining a steady balance between nutrient supply and energy demand is essential for all living organisms and is achieved through the dynamic control of metabolic processes that produce and consume adenosine-5'-triphosphate (ATP), the universal currency of energy in all cells. A key sensor of cellular energy is the adenosine-5'-monophosphate (AMP)-activated protein kinase (AMPK), which is the core component of a signaling network that regulates energy and nutrient metabolism. AMPK is activated by metabolic stresses that decrease cellular ATP, and functions to restore energy balance by orchestrating a switch in metabolism away from anabolic pathways toward energy-generating catabolic processes...
March 23, 2017: Biochemical Journal
https://www.readbyqxmd.com/read/28335208/the-influence-of-fluorination-on-nano-scale-phase-separation-and-photovoltaic-performance-of-small-molecular-pc71bm-blends
#6
Zhen Lu, Wen Liu, Jingjing Li, Tao Fang, Wanning Li, Jicheng Zhang, Feng Feng, Wenhua Li
To investigate the fluorination influence on the photovoltaic performance of small molecular based organic solar cells (OSCs), six small molecules based on 2,1,3-benzothiadiazole (BT), and diketopyrrolopyrrole (DPP) as core and fluorinated phenyl (DFP) and triphenyl amine (TPA) as different terminal units (DFP-BT-DFP, DFP-BT-TPA, TPA-BT-TPA, DFP-DPP-DFP, DFP-DPP-TPA, and TPA-DPP-TPA) were synthesized. With one or two fluorinated phenyl as the end group(s), HOMO level of BT and DPP based small molecular donors were gradually decreased, inducing high open circuit voltage for fluorinated phenyl based OSCs...
April 21, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28333889/normothermic-ex-situ-liver-preservation-the-new-gold-standard
#7
Richard W Laing, Hynek Mergental, Darius F Mirza
PURPOSE OF REVIEW: Normothermic machine perfusion of the liver (NMP-L) is a novel technology recently introduced into the practice of liver transplantation. This review recapitulates benefits of normothermic perfusion over conventional static cold storage and summarizes recent publications in this area. RECENT FINDINGS: The first clinical trials have demonstrated both safety and feasibility of NMP-L. They have shown that machine perfusion can entirely replace cold storage or be commenced following a period of cold ischaemia...
March 22, 2017: Current Opinion in Organ Transplantation
https://www.readbyqxmd.com/read/28333859/multicenter-prospective-study-for-laboratory-diagnosis-of-hhv8-infection-in-solid-organ-donors-and-transplant-recipients-and-evaluation-of-the-clinical-impact-after-transplantation
#8
Angela Chiereghin, Patrizia Barozzi, Evangelia Petrisli, Giulia Piccirilli, Liliana Gabrielli, Giovanni Riva, Leonardo Potenza, Gianni Cappelli, Nicola De Ruvo, Irene Libri, Umberto Maggiore, Maria Cristina Morelli, Luciano Potena, Paola Todeschini, Dino Gibertoni, Manuel Labanti, Gabriela Sangiorgi, Gaetano La Manna, Antonio Daniele Pinna, Mario Luppi, Tiziana Lazzarotto
BACKGROUND: We performed serological and molecular pretransplant screening in solid organ transplant (SOT) donors and recipients in north-central Italy and a surveillance program for human herpes virus 8 (HHV8) infection after transplant, aiming to establish an optimal management of HHV8 infection in SOT recipients. METHODS: For pretransplant HHV8 screening in both donors and recipients, 6 serological (4 indirect immunofluorescent assays (IFA) and 2 enzyme-linked immunosorbent assays (ELISA) - both HHV8 lytic and latent antigen-based) and 2 molecular assays were used...
March 22, 2017: Transplantation
https://www.readbyqxmd.com/read/28332729/transplantation-of-kidneys-from-hepatitis-c-positive-donors-into-hepatitis-c-virus-infected-recipients-followed-by-early-initiation-of-direct-acting-antiviral-therapy-a-single-center-retrospective-study
#9
Kalyan Ram Bhamidimarri, Marco Ladino, Fernando Pedraza, Giselle Guerra, Adela Mattiazzi, Linda Chen, Gaetano Ciancio, Warren Kupin, Paul Martin, George Burke, David Roth
The availability of direct acting antiviral agents (DAA) has transformed the treatment of hepatitis C virus (HCV) infection. The current study is a case series that reports the outcomes from a cohort of twenty-five HCV-infected ESRD patients who received a kidney from an anti-HCV-positive deceased organ donor followed by treatment with DAAs in the early post-transplant period. Time to transplantation and the efficacy of DAA therapy as measured by sustained viral response at 12 weeks were assessed. The median waiting time from original date of activation on the UNOS waiting list until transplantation was 427 days, however, the median time from entering the patient into UNet(sm) for a HCV positive offer until transplantation was only 58 days...
March 23, 2017: Transplant International: Official Journal of the European Society for Organ Transplantation
https://www.readbyqxmd.com/read/28332370/the-need-for-new-donor-stratification-to-predict-graft-survival-in-deceased-donor-kidney-transplantation
#10
Shin Seok Yang, Jaeseok Yang, Curie Ahn, Sang Il Min, Jongwon Ha, Sung Joo Kim, Jae Berm Park
PURPOSE: The aim of this study was to determine whether stratification of deceased donors by the United Network for Organ Sharing (UNOS) criteria negatively impacts graft survival. MATERIALS AND METHODS: We retrospectively reviewed deceased donor and recipient pretransplant variables of kidney transplantations that occurred between February 1995 and December 2009. We compared clinical outcomes between standard criteria donors (SCDs) and expanded criteria donors (ECDs)...
May 2017: Yonsei Medical Journal
https://www.readbyqxmd.com/read/28329707/dendritic-cells-display-subset-and-tissue-specific-maturation-dynamics-over-human-life
#11
Tomer Granot, Takashi Senda, Dustin J Carpenter, Nobuhide Matsuoka, Joshua Weiner, Claire L Gordon, Michelle Miron, Brahma V Kumar, Adam Griesemer, Siu-Hong Ho, Harvey Lerner, Joseph J C Thome, Thomas Connors, Boris Reizis, Donna L Farber
Maturation and migration to lymph nodes (LNs) constitutes a central paradigm in conventional dendritic cell (cDC) biology but remains poorly defined in humans. Using our organ donor tissue resource, we analyzed cDC subset distribution, maturation, and migration in mucosal tissues (lungs, intestines), associated lymph nodes (LNs), and other lymphoid sites from 78 individuals ranging from less than 1 year to 93 years of age. The distribution of cDC1 (CD141(hi)CD13(hi)) and cDC2 (Sirp-α(+)CD1c(+)) subsets was a function of tissue site and was conserved between donors...
March 21, 2017: Immunity
https://www.readbyqxmd.com/read/28329699/of-human-dc-migrants-and-residents
#12
Elodie Segura, Vassili Soumelis
Migration from peripheral tissues to lymph nodes is a key feature of dendritic cells (DCs), but little is known about the migration patterns of human DCs. By analyzing multiple lymphoid organs and tissues from the same donors, Granot et al. propose that the two main subsets of human DCs display different migratory capacity.
March 21, 2017: Immunity
https://www.readbyqxmd.com/read/28329348/outcome-and-treatment-of-nocardiosis-after-solid-organ-transplantation-new-insights-from-a-european-study
#13
David Lebeaux, Romain Freund, Christian van Delden, Hélène Guillot, Sierk D Marbus, Marie Matignon, Eric Van Wijngaerden, Benoit Douvry, Julien De Greef, Fanny Vuotto, Leïla Tricot, Mario Fernández-Ruiz, Jacques Dantal, Cédric Hirzel, Jean-Philippe Jais, Veronica Rodriguez-Nava, Frédérique Jacobs, Olivier Lortholary, Julien Coussement
Background: Solid organ transplant (SOT) recipients are at risk of nocardiosis, a rare opportunistic bacterial infection, but prognosis and outcome of these patients are poorly defined. Our objectives were to identify factors associated with one-year mortality after nocardiosis and describe the outcome of patients receiving short-course antibiotics (≤120 days). Methods: We analyzed data from a multicenter European case-control study that included 117 SOT recipients with nocardiosis diagnosed between 2000 and 2014...
February 4, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28329066/impact-of-donor-comorbidities-on-heart-transplant-outcomes-in-the-modern-era
#14
Julien Guihaire, Pierre Emmanuel Noly, Amandine Martin, Mathilde Rojo, Marie Aymami, Anne Ingels, Bernard Lelong, Céline Chabanne, Jean-Philippe Verhoye, Erwan Flécher
OBJECTIVES: The use of marginal donors with cardiovascular risk factors is increasing due to organ shortage but remains controversial in heart transplantation (HTx). We sought to investigate post-transplant outcomes in the recent era taking into account donor characteristics. METHODS: We reviewed 261 HTx performed in our hospital between January 1996 and March 2013. Donor characteristics were obtained from the national database. The incidence of primary graft dysfunction (PGD) and cardiac allograft vasculopathy (CAV) and overall survival were compared in 2 groups of HTx recipients: those receiving transplants from 1996 to 2004 (Group A, n =  120) and from 2005 to 2013 (Group B, n =  141)...
February 20, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/28326131/spectral-and-dft-studies-of-anion-bound-organic-receptors-time-dependent-studies-and-logic-gate-applications
#15
Srikala Pangannaya, Neethu Padinchare Purayil, Shweta Dabhi, Venu Mankad, Prafulla K Jha, Satyam Shinde, Darshak R Trivedi
New colorimetric receptors R1 and R2 with varied positional substitution of a cyano and nitro signaling unit having a hydroxy functionality as the hydrogen bond donor site have been designed, synthesized and characterized by FTIR, (1)H NMR spectroscopy and mass spectrometry. The receptors R1 and R2 exhibit prominent visual response for F(-) and AcO(-) ions allowing the real time analysis of these ions in aqueous media. The formation of the receptor-anion complexes has been supported by UV-vis titration studies and confirmed through binding constant calculations...
2017: Beilstein Journal of Organic Chemistry
https://www.readbyqxmd.com/read/28325936/in-situ-gisaxs-study-of-supramolecular-nanofibers-having-ultrafast-humidity-sensitivity
#16
Arpan Bhattacharyya, Milan K Sanyal, Umesha Mogera, Subi J George, Mrinmay K Mukhopadhyay, Santanu Maiti, Giridhar U Kulkarni
Self assembled nanofibers derived from donor-acceptor (D-A) pair of dodecyl methyl viologen (DMV) and potassium salt of coronene tetracarboxylate (CS) is an excellent material for the development of organic electronic devices particularly for ultrafast response to relative humidity (RH). Here we have presented the results of in-situ grazing incidence small angle x-ray scattering (GISAXS) measurements to understand aridity dependent self reorganization of the nanofibers. The instantaneous changes in the organization of the nanofibers was monitored with different equilibrium RH conditions...
March 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28325643/alpha-cells-the-main-source-of-il-1%C3%AE-in-human-pancreas
#17
Florence Anquetil, Somayeh Sabouri, Charles Thivolet, Teresa Rodriguez-Calvo, Jose Zapardiel-Gonzalo, Natalie Amirian, Darius Schneider, Ericka Castillo, Yasaman Lajevardi, Matthias G von Herrath
Interleukin-1β (IL-1β) is known to trigger beta cell dysfunction in vitro and could potentially play a role during the pathogenesis of type 1 diabetes and type 2 diabetes. However, several clinical trials attempting to block IL-1β function have had minimal success. We therefore re-investigated local expression of IL-1β in human diabetic and non-diabetic pancreata. We obtained pancreatic tissue sections from the Network for Pancreatic Organ Donors with Diabetes (nPOD) including non-diabetic (n = 9), non-diabetic auto-antibody positive (AAb+, n = 5), type 1 diabetes (n = 6), and type 2 diabetes (n = 6) donors...
March 18, 2017: Journal of Autoimmunity
https://www.readbyqxmd.com/read/28325045/particle-size-dependent-f%C3%A3-rster-resonance-energy-transfer-from-upconversion-nanoparticles-to-organic-dyes
#18
Verena Muhr, Christian Würth, Marco Kraft, Markus Buchner, Ute Resch-Genger, Antje J Baeumner, Thomas Hirsch
Upconversion nanoparticles (UCNPs) are attractive candidates for energy transfer-based analytical applications. In contrast to classical donor-acceptor pairs, these particles contain many emitting lanthanide ions together with numerous acceptor dye molecules at different distances to each other, strongly depending on the particle diameter. UCNPs with precisely controlled sizes between 10 and 43 nm were prepared and functionalized with rose bengal and sulforhodamine B by a ligand exchange procedure. Time-resolved studies of the upconversion luminescence of the UCNP donor revealed a considerable shortening of the donor lifetime as a clear hint for Förster resonance energy transfer (FRET)...
March 22, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28324830/chitinase-3-like-1-deficient-donor-splenocytes-accentuated-the-pathogenesis-of-acute-graft-versus-host-diseases-through-regulating-t-cell-expansion-and-type-i-inflammation
#19
Zengyao Li, Jian Gu, Jing Liu, Qin Zhu, Hao Lu, Yunjie Lu, Jianhua Rao, Ling Lu, Xuehao Wang
Acute graft-versus-host disease (aGVHD) is a major complication following transplantation, limiting the success of this therapy. Chitinase 3-like-1 (CHI3L1), a member of the glycosyl hydrolase 18 family, plays a critical role in bacterial infections, allergic disease and a variety of malignancies. Here, we investigated whether CHI3L1 could affect the pathogenesis of aGVHD in a mouse allo-HCT model. In this study, we show that CHI3L1 deficiency in donor T cells increased the severity of aGVHD through enhancing systemic and local inflammation...
March 16, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28323930/%C3%AE-cells-persist-in-t1d-pancreata-without-evidence-for-ongoing-%C3%AE-cell-turnover-or-neogenesis
#20
Carol J Lam, Daniel R Jacobson, Matthew M Rankin, Aaron R Cox, Jake A Kushner
Context: The cellular basis of persistent β-cell function in T1D remains enigmatic. No extensive quantitative β-cell studies of T1D pancreata have been performed to test for ongoing β-cell regeneration or neogenesis. Objective: We sought to determine the mechanism of β-cell persistence in T1D pancreata. Design: We studied T1D (n=47) and non-diabetic control (n=59) pancreata over a wide range of ages from the JDRF Network of Pancreatic Organ donors with Diabetes (nPOD) via high throughput microscopy...
February 27, 2017: Journal of Clinical Endocrinology and Metabolism
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