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Zaida Ortega, María Elena Alemán, Ricardo Donate
The use of fibers into scaffolds is a way to mimic natural tissues, in which fibrils are embedded in a matrix. The use of fibers can improve the mechanical properties of the scaffolds and may act as structural support for cell growth. Also, as the morphology of fibrous scaffolds is similar to the natural extracellular matrix, cells cultured on these scaffolds tend to maintain their phenotypic shape. Different materials and techniques can be used to produce micrfibers- and nanofibers for scaffolds manufacturing; cells, in general, adhere and proliferate very well on PCL, chitosan, silk fibroin, and other nanofibers...
2018: Advances in Experimental Medicine and Biology
Matthew D Howard, John C Su, Alvin H Chong
The number of solid organ transplants has been increasing annually worldwide. Advances in transplantation surgery and community awareness of organ donation have been key contributors. Combined with increased understanding of immunosuppression, there are a growing number of solid organ transplant recipients in the community as a result of improved long-term outcomes. There remains a high incidence of deaths worldwide post-transplant due to non-melanoma skin cancer (NMSC), which has greater morbidity and mortality in this population than in the general community...
April 24, 2018: American Journal of Clinical Dermatology
Jinhui Shen, Yang Yang, Xiaoli Hou, Wenlei Zeng, Aimin Yu, Xiaowei Zhao, Xiangtai Meng
A new Darzens reaction of thioisatins and sulfonium salts has, for the first time, been reported. This reaction allows efficient access to thiochromenone derivatives in good to excellent yields under mild reaction conditions. The substrate scope includes both electron-withdrawing and electron-donating groups on both the thioisatins and sulfonium salts. Moreover, some of the synthesized thiochromenone derivatives have been found to show potent anticancer activities against six different cancer cell lines using the methylthiazoltetrazolium (MTT) assay...
April 25, 2018: Organic & Biomolecular Chemistry
Andreas Elmer, Matthias Birrer, Julius Weiss, John-David Aubert, Christian Benden, Ilhan Inci, Thorsten Krüger, Paola M Soccal, Franz F Immer
AIM: Various scoring systems aim to assess the quality of organs donated for transplantation on the basis of patient characteristics, clinical examination and laboratory results. How well such scoring systems reflect the practice in lung transplantation in Switzerland has never been studied. Therefore, we evaluated two scoring systems for their ability to predict whether or not donor lungs are accepted by the two Swiss lung transplant centres. METHODS: We retrospectively analysed patient data of adult deceased organ donors in Switzerland between 1 July 2007 and 30 June 2014...
April 24, 2018: Swiss Medical Weekly
B A Kiberd, K Doucette, A J Vinson, K K Tennankore
Currently many but not all centers transplant HCV viremic positive (+) donor kidneys into HCV+ recipients. Directed donation of HCV+ organs reduces the wait time to transplantation for HCV+ patients. Direct acting antiviral (DAA) therapy has the ability to cure HCV in virtually all infected. Some have suggested that treatment of HCV+ wait listed patients be deferred with the hope that earlier transplantation will provide better outcomes than early DAA therapy. However there are not enough organs to guarantee prompt transplantation for the current wait list of infected candidates...
April 24, 2018: American Journal of Transplantation
Xiaojie Yin, Hengqiao Chen, Chuanwei Zhi, Weiwei Sun, Li-Ping Lv, Yong Wang
Yolk-shell NiO microspheres are modified by two types of functionalized graphene quantum dots (denoted as NiO/GQDs) via a facile solvothermal treatment. The modification of GQDs on the surface of NiO greatly boosts the stability of the NiO/GQD electrode during long-term cycling. Specifically, the NiO with carboxyl-functionalized GQDs (NiO/GQDsCOOH) exhibits better performances than NiO with amino-functionalized GQDs (NiO/GQDsNH2 ). It delivers a capacity of ≈1081 mAh g-1 (NiO contribution: ≈1182 mAh g-1 ) after 250 cycles at 0...
April 24, 2018: Small
Ercan Avci
Kidney transplantation is a lifesaving medical treatment. However, very high demand for kidneys with low kidney donation causes a black market that exploits patients' desperation and donors' vulnerability. The current kidney donation programs fail to produce promising results to avoid illegal and unethical kidney trafficking and commercialism. Even though the primary goal of kidney donation is to increase the number of deceased organ donations, in some countries, like Turkey, due to religious or cultural concerns, it is impossible to supply adequate deceased kidney donations...
April 23, 2018: Developing World Bioethics
Letícia Kraft, Felipe Francisco Tuon, Victoria Stadler Tasca Ribeiro, Luciana Cristina Wollmann, Paula Hansen Suss, Marcelo Pilonetto, Francisco Diniz Affonso da Costa
Most tissue banks use the conventional method; however, the automated method has advantages over the conventional method. The aim of this study was to compare the conventional and automated methods of culture in human cardiac tissue using an artificial contamination model. Myocardial samples were contaminated with sequential concentration (104 to 10-1  CFU/mL) with Pseudomonas aeruginosa, Escherichia coli, Staphylococcus aureus and Candida albicans. Cultures were obtained from solution were the fragment was immersed and minced tissue, before and after the routine decellularization solution, with automated and conventional culture methods...
April 23, 2018: Cell and Tissue Banking
Olivier Garraud, Jean-Daniel Tissot
Blood transfusion is made possible because, in most countries and organizations, altruistic individuals voluntarily, anonymously, and generously donate (without compensation) either whole blood or separated components that are then processed and distributed by professionals, prior to being allocated to recipients in need. Being part of modern medicine, blood transfusion uses so-called standard blood components when relative to cellular fractions and fresh plasma. However, as will be discussed in this paper, strictly speaking, such so-called labile blood components are not completely standard...
2018: Frontiers in Medicine
J J Egea-Guerrero, L Martín-Villén, Z Ruiz de Azúa-López, F Maroto Monserrat, J A Sanchez-Román, F Cabeza-Cabeza
No abstract text is available yet for this article.
April 20, 2018: Medicina Intensiva
Aseem K Tiwari, Gunjan Bhardwaj, Ravi C Dara, Dinesh Arora, Geet Aggarwal, Richa Bhargava, Kaushal Madan
INTRODUCTION: Post-donation counselling informs donors of unusual test results. Timely notification and counselling regarding their Transfusion Transmitted Infection (TTI) status is necessary for early clinical intervention in the donor and reducing risk of transmission. We share our experience with respect to Hepatitis B (HBV) and Hepatitis C (HCV) positive donors who were counselled and followed-up for clinical outcome. MATERIALS AND METHODS: It was prospective 2-year study in TTI positive blood donors...
April 13, 2018: Transfusion and Apheresis Science
Amanda F Assis, Jie Li, Paula B Donate, Janaína A Dernowsek, Nancy R Manley, Geraldo A Passos
A secondary cervical thymus (CT) is present in the neck region in about 50% of human and mice. CT in mice is an independent and functional organ, which can be colonized by T lymphocyte progenitors and generate thymocytes that are selected by the T cell receptor repertoire following the positive and negative selection. However, CT and the main thoracic thymus (TT) have been shown in mice to have significant functional differences. In this study, we use transcriptional profiling to compare mRNA or miRNAs expression patterns in murine CT and TT...
April 20, 2018: Molecular Immunology
Kushan Dasgupta
This study examines challenges involved in recruiting bone marrow donors. Data comes from participant observation with a recruitment organization in the United States. Findings reveal that recruiters try to express bone marrow donation with common "gift of life" messaging, which emphasizes a singular event involving generosity. Potential recruits, however, respond by focusing on pain and time commitments. These concerns draw attention to the many stages and requirements involved in bone marrow donation and make issues of compliance salient...
April 12, 2018: Social Science & Medicine
Nina X Gu, Paul H Oyala, Jonas C Peters
Believed to accumulate on the Fe sites of the FeMo-cofactor (FeMoco) of MoFe-nitrogenase under turnover, strongly donating hydrides have been proposed to facilitate N2 binding to Fe and may also participate in the hydrogen evolution process concomitant to nitrogen fixation. Here, we report the synthesis and characterization of a thiolate-coordinated FeIII(H)(N2) complex, which releases H2 upon warming to yield an FeII-N2-FeII complex. Bimolecular reductive elimination of H2 from metal hydrides is pertinent to the hydrogen evolution processes of both enzymes and electrocatalysts, but well-defined examples are uncommon and usually observed from diamagnetic second- and third-row transition metals...
April 23, 2018: Journal of the American Chemical Society
Jessica Julia Falk, Martina Winkelmann, Dagmar Stöhr, Mira Alt, Hubert Schrezenmeier, Adalbert Krawczyk, Ramin Lotfi, Christian Sinzger
To improve the potency of anti-human cytomegalovirus (HCMV) immunoglobulin preparations, we intended to find elite neutralizers among 9000 HCMV-seropositive blood donors. We identified 2.6 % top neutralizers using a high throughput screening and further analyzed the 80 most effective plasmas for strain-independent activity. Of those, 58 were broadly neutralizing towards various HCMV strains and hence regarded "elite" neutralizers. All elite neutralizers were then analyzed concerning their effect on individual virus particles during entry...
April 19, 2018: Journal of Infectious Diseases
Macey L Henderson, Joel T Adler, Sarah E Van Pilsum Rasmussen, Alvin G Thomas, Patrick D Herron, Madeleine M Waldram, Jessica M Ruck, Tanjala S Purnell, Sandra R DiBrito, Courtenay M Holscher, Christine E Haugen, Yewande Alimi, Jonathan M Konel, Ann K Eno, Jacqueline M Garonzik Wang, Elisa J Gordon, Krista L Lentine, Randolph L Schaffer, Andrew M Cameron, Dorry L Segev
BACKGROUND: Social media platforms are increasingly used in surgery and have shown promise as effective tools to promote deceased donation and expand living donor transplantation. There is growing need to understand how social media-driven communication is perceived by providers in the field of transplantation. METHODS: We surveyed 299 members of the American Society of Transplant Surgeons (ASTS) about their use of, attitudes toward, and perceptions of social media and analyzed relationships between responses and participant characteristics...
April 21, 2018: Transplantation
Matyas Hamar, Peter Urbanellis, Moritz Johann Kaths, Dagmar Kollmann, Ivan Linares, Sujani Ganesh, Aryn Wiebe, Jun Yu Cen, Paul M Yip, Rohan John, Ana Konvalinka, Istvan Mucsi, Anand Ghanekar, Darius Bagli, David R Grant, Lisa A Robinson, Markus Selzner
BACKGROUND: Cold storage is poorly tolerated by kidney grafts retrieved after Donation after Circulatory Death (DCD). It has been determined that normothermic ex vivo kidney perfusion (NEVKP) preservation decreases injury by minimizing cold ischemic storage. The impact of NEVKP on warm ischemic injury is unknown. METHODS: We compared pig kidneys retrieved after 30minutes warm ischemia and immediate transplantation (no-preservation) with grafts that were exposed to 30min of warm ischemia plus 8hr NEVKP or plus 8hr SCS...
April 21, 2018: Transplantation
Wesley M Durand, Jillian L Peters, Adam E M Eltorai, Saisanjana Kalagara, Adena J Osband, Alan H Daniels
An increasing number of patients and families are utilizing online crowdfunding to support their medical expenses related to organ transplantation. The factors influencing the success of crowdfunding campaigns are poorly understood. Crowdfunding campaigns were abstracted from a popular crowdfunding website. Campaigns were included if they were actively accepting donations to fund medical expenses related to transplantation of selected organs. The primary outcome measure was total amount raised among successful campaigns receiving at least one donation...
April 23, 2018: Clinical Transplantation
Nishtha Saxena, Nancy Taneja, Prakriti Shome, Shalini Mani
Mitochondria are present in all human cells and vary in number from a few tens to many thousands. As they generate the majority of a cell's energy supply which power every part of our body, and hence, their number varies in different cells as per the energy requirement of the cell. Mitochondria have their own separate DNA, which carries total 13 genes. All of these 13 genes are involved in energy production. For normal functioning of cells, the mitochondria need to be healthy. Unhealthy mitochondria can cause severe medical disorders known as mitochondrial disease...
January 2018: Journal of Human Reproductive Sciences
Rabindra N Bhattacharjee, Mahms Richard-Mohamed, Qizhi Sun, Aaron Haig, Ghaleb Aboalsamh, Peter Barrett, Richard Mayer, Ibrahim Alhasan, Karen Pineda-Solis, Larry Jiang, Hajed Alharbi, Manujendra Saha, Eric Patterson, Alp Sener, Gediminas Cepinskas, Anthony M Jevnikar, Patrick P W Luke
BACKGROUND: Carbon monoxide (CO) inhalation protects organ by reducing inflammation and cell death during transplantation processes in animal model. However, using CO in clinical transplantation is difficult due to its delivery in a controlled manner. A manganese-containing CORM-401 has recently been synthesized which can efficiently deliver 3 molar equivalents of CO. We report the ability of this anti-inflammatory CORM-401 to reduce ischemia reperfusion injury associated with prolonged cold storage of renal allografts obtained from donation after cardiac death in a porcine model of transplantation...
April 19, 2018: Transplantation
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