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Suman Lahiry, Christopher Levi, Joosup Kim, Dominique A Cadilhac, Andrew Searles
Background: In regional and rural Australia, patients experiencing ischemic stroke do not have equitable access to an intravenous recombinant tissue plasminogen activator (tPA). Although thrombolysis with tPA is a clinically proven and cost-effective treatment for eligible stroke patients, there are few economic evaluations on pre-hospital triage interventions to improve access to tPA. Aim: To describe the potential cost-effectiveness of the pre-hospital acute stroke triage (PAST) protocol implemented to provide priority transfer of appropriate patients from smaller hospitals to a primary stroke center (PSC) in regional New South Wales, Australia...
2018: Frontiers in Public Health
Eliécer E Gutiérrez, Guilherme S T Garbino
A recently proposed taxonomic classification of extant ungulates sparked a series of publications that criticize the Phylogenetic Species Concept (PSC) claiming it to be a particularly poor species concept. These opinions reiteratively stated that (1) the two fundamental elements of the "PSC", i.e., monophyly and diagnosability, do not offer objective criteria as to where the line between species should be drawn; and (2) that extirpation of populations can lead to artificial diagnosability and spurious recognitions of species...
March 8, 2018: Zoological Research
Axel Andres, Aldo Montano-Loza, Russell Greiner, Max Uhlich, Ping Jin, Bret Hoehn, David Bigam, James Andrew Mark Shapiro, Norman Mark Kneteman
Deciding who should receive a liver transplant (LT) depends on both urgency and utility. Most survival scores are validated through discriminative tests, which compare predicted outcomes between patients. Assessing post-transplant survival utility is not discriminate, but should be "calibrated" to be effective. There are currently no such calibrated models. We developed and validated a novel calibrated model to predict individual survival after LT for Primary Sclerosing Cholangitis (PSC). We applied a software tool, PSSP, to adult patients in the Scientific Registry of Transplant Recipients (n = 2769) who received a LT for PSC between 2002 and 2013; this produced a model for predicting individual survival distributions for novel patients...
2018: PloS One
Kakaraparthi Kranthiraja, Um Kanta Aryal, Vijaya Gopalan Sree, Kumarasamy Gunasekar, Changyeon Lee, Minseok Kim, Bumjoon J Kim, Myungkwan Song, Sung-Ho Jin
The ternary blend approach has the potential to enhance the power conversion efficiencies (PCEs) of polymer solar cells (PSCs) by providing complementary absorption and efficient charge generation. Unfortunately, most PSCs are processed with toxic halogenated solvents, which are harmful to human health and the environment. Herein, we report the addition of a non-fullerene electron acceptor (ITIC) to a binary blend (P1:PC71BM, PCE = 8.07%) to produce an efficient non-halogenated green solvent-processed ternary PSC system with a high PCE of 10...
March 14, 2018: ACS Applied Materials & Interfaces
Yoshihide Ueda, Toshimi Kaido, Hideaki Okajima, Koichiro Hata, Takayuki Anazawa, Atsushi Yoshizawa, Shintaro Yagi, Kojiro Taura, Toshihiko Masui, Noriyo Yamashiki, Hironori Haga, Miki Nagao, Hiroyuki Marusawa, Hiroshi Seno, Shinji Uemoto
Background: Primary sclerosing cholangitis (PSC) is a progressive cholestatic liver disease, with liver transplantation being the sole life-saving treatment for end-stage PSC-related liver disease. However, recurrence of PSC after liver transplantation is a common complication, with the risk factors for recurrence being controversial. Methods: We conducted a retrospective chart review of 45 patients who had undergone liver transplantation for PSC at our institute...
December 2017: Transplantation Direct
Mohammad Mahdi Tavakoli, Fabrizio Giordano, Shaik M Zakeeruddin, Michael Grätzel
The solar to electric power conversion efficiency (PCE) of perovskite solar cells (PSCs) has recently reached 22.7 % exceeding that of competing thin film photovoltaics and the market leader polycrystalline silicon. Further augmentation of the PCE towards the Shockley-Queisser limit of 33.5 % warrants suppression of radiationless carrier recombination by judicious engineering of the interface between the light harvesting perovskite and the charge carrier extraction layers. Here, we introduce a mesoscopic oxide double layer as electron selective contact consisting of a scaffold of TiO2 nanoparticles covered by a thin film of SnO2, either in amorphous (a-SnO2), crystalline (c-SnO2) or nanocrystalline (quantum dot) form (SnO2-NC)...
March 12, 2018: Nano Letters
Noriomi Eguchi, Ichiro Sora, Keiko Muguruma
Human brain development has generally been studied through the analysis of postmortem tissues because of limited access to fetal brain tissues. This approach, however, only provides information from the perspective of long-term development. To investigate the pathophysiology of neurodevelopmental disorders, it is necessary to understand the detailed mechanisms of human brain development. Recent advances in pluripotent stem cell (PSC) technologies enable us to establish in vitro brain models from human induced PSCs (hiPSCs), which can be used to examine the pathophysiological mechanisms of neurodevelopmental disorders...
March 7, 2018: Biochemical and Biophysical Research Communications
Mohamad A Mouchli, Siddharth Singh, Lisa Boardman, David H Bruining, Amy L Lightner, Charles B Rosen, Julie K Heimbach, Bashar Hasan, John J Poterucha, Kymberly D Watt, Sunanda V Kane, Laura E Raffals, Edward V Loftus
Background: The course of inflammatory bowel disease (IBD) after liver transplantation (LT) for primary sclerosing cholangitis (PSC) is poorly understood. We describe the natural history of established IBD after LT (including risk of disease progression, colectomy, and neoplasia) and de novo IBD. Methods: In a retrospective cohort, we identified all patients with PSC who underwent LT for advanced PSC at Mayo Clinic, Rochester, Minnesota. Risk factors were identified using multivariate Cox proportional hazard analysis...
March 7, 2018: Inflammatory Bowel Diseases
Bo Xiao, Ailing Tang, Jing Yang, Asif Mahmood, Xiangnan Sun, Erjun Zhou
We used the quinoxaline (Qx) unit to design and synthesize two non-fullerene small molecular acceptors (NFSMAs) of Qx1 and Qx1b with A2=A1-D-A1=A2 skeleton, where indacenodithiophene (IDT), Qx and rhodanine (R) were adopted as the central donor (D), bridge acceptors (A1) and terminal acceptors (A2). Qx1 and Qx1b contain the different side chains of 4-hexylphenyl and octyl in the central IDT segment in order to modify the properties of final small molecules. Both small molecules show good thermal stability, high solubility, strong and broad absorption spectra with optical bandgaps of 1...
March 9, 2018: ACS Applied Materials & Interfaces
Phillip M Pifer, Mark K Farrugia, Malcolm D Mattes
BACKGROUND: Early palliative/supportive care (PSC) consultation and advance care planning (ACP) improve outcomes for patients with incurable cancer. However, PSC is underutilized in the United States. OBJECTIVE: To examine philosophical differences among PSC, radiation oncology (RO), and medical oncology (MO) physicians in order to understand barriers to early PSC referral. DESIGN: An electronic survey collected views of a nationwide cohort of health-care professionals regarding ACP and end-of-life care...
January 1, 2018: American Journal of Hospice & Palliative Care
Sarah Keller, Annette Aigner, Roman Zenouzi, Anne C Kim, Arnoud Meijer, Sören A Weidemann, Till Krech, Ansgar W Lohse, Gerhard Adam, Christoph Schramm, Jin Yamamura
OBJECTIVE: To evaluate magnetic resonance imaging (MRI) parameters T2 signal, contrast enhancement (CE), and relative liver enhancement (RLE) of extracellular gadolinium-based contrast agent (GBCA)-enhanced MRI as a marker for hepatic fibrosis and inflammation in patients with primary sclerosing cholangitis (PSC). METHODS: 3.0-Tesla MRI scans and liver biopsies of 40 patients (41.2 ± 17.1 years) were retrospectively reviewed. Biopsies were obtained within a mean time of 54 ± 55 days to MRI scans and specimens were categorized according to Ishak modified hepatic activity index (mHAI) and Scheuer staging of fibrosis...
2018: PloS One
Christian Rupp, Alexander Rössler, Taotao Zhou, Conrad Rauber, Kilian Friedrich, Andreas Wannhoff, Karl-Heinz Weiss, Peter Sauer, Peter Schirmacher, Caner Süsal, Wolfgang Stremmel, Daniel N Gotthardt
Background: The median age of diagnosis of primary sclerosing cholangitis (PSC) is ∼30-40 years. Objective: We aimed to analyse disease progression and liver-dependent survival in patients diagnosed with PSC after 50 years of age. Methods: Patients with PSC were analysed with regard to their age at diagnosis. Patients with a first diagnosis of PSC after the age of 50 years were considered as the late-onset group. Results: A total of 32/215 (14...
March 2018: United European Gastroenterology Journal
Hella Wobser, Tanja Paur, Elisabeth Schnoy, Janine Hartl, Gabriele I Kirchner
Background: Several years ago the International Autoimmune Hepatitis Group simplified the previous revised original scoring system for diagnosis of autoimmune hepatitis (AIH) into a scoring system based on only four instead of 13 parameters. Objective: We aimed to evaluate the suitability of the simplified AIH score for diagnosis of AIH in a German cohort with chronic liver diseases. Methods: In this retrospective single-center study, we compared the accuracy of both AIH scores in 70 patients with AIH and 211 patients with chronic liver diseases (PBC ( n  = 52), PSC ( n  = 27), NASH ( n  = 67), DILI ( n  = 15), CHB/C ( n  = 50))...
March 2018: United European Gastroenterology Journal
Chung-Kai Wu, Kundan Sivashanmugan, Tzung-Fang Guo, Ten-Chin Wen
In this study, the performance and stability of inverted bulk heterojunction (BHJ) polymer solar cells (PSCs) is enhanced by doping zinc oxide (ZnO) with 0-6 wt % cetyltrimethylammonium bromide (CTAB) in the sol-gel ZnO precursor solution. The power conversion efficiency (PCE) of the optimized 3 wt % CTAB-doped ZnO PSCs was increased by 9.07%, compared to a PCE of 7.31% for the pristine ZnO device. The 0-6 wt % CTAB-doped ZnO surface roughness was reduced from 2.6 to 1 nm and the number of surface defects decreased...
March 4, 2018: Materials
Pengjun Zhao, Manhyung Han, Wenping Yin, Xing Zhao, Seul-Gi Kim, Yaping Yan, Minwoo Kim, Young Jae Song, Nam-Gyu Park, Hyun Suk Jung
Currently, the most efficient perovskite solar cells (PSCs) mainly use planar and mesoporous titanium dioxide (TiO2) as an electron-transporting-layer (ETL). However, due to its intrinsic photocatalytic properties, TiO2 can decompose perovskite absorber and lead to poor stability under solar illumination (ultraviolet light). Herein, simplified architectural ETL-free PSC with enhanced efficiency and outstanding photostability is produced by the facile deposition of Bathocuproine (BCP) interlayer. Power conversion efficiency (PCE) of ETL-free PSC improves from 15...
March 6, 2018: ACS Applied Materials & Interfaces
Urs Christen, Edith Hintermann
Autoimmune hepatitis (AIH), primary biliary cholangitis (PBC), and primary sclerosing cholangitis (PSC) are serious autoimmune liver diseases that are characterized by a progressive destruction of the liver parenchyma and/or the hepatic bile ducts and the development of chronic fibrosis. Left untreated autoimmune liver diseases are often life-threatening, and patients require a liver transplantation to survive. Thus, an early and reliable diagnosis is paramount for the initiation of a proper therapy with immunosuppressive and/or anticholelithic drugs...
2018: Frontiers in Immunology
Cathelijne W van den Berg, Laila Ritsma, M Cristina Avramut, Loes E Wiersma, Bernard M van den Berg, Daniëlle G Leuning, Ellen Lievers, Marije Koning, Jessica M Vanslambrouck, Abraham J Koster, Sara E Howden, Minoru Takasato, Melissa H Little, Ton J Rabelink
Human pluripotent stem cell (hPSC)-derived kidney organoids may facilitate disease modeling and the generation of tissue for renal replacement. Long-term application, however, will require transferability between hPSC lines and significant improvements in organ maturation. A key question is whether time or a patent vasculature is required for ongoing morphogenesis. Here, we show that hPSC-derived kidney organoids, derived in fully defined medium conditions and in the absence of any exogenous vascular endothelial growth factor, develop host-derived vascularization...
February 28, 2018: Stem Cell Reports
Xianbin Li, Qing Tian, Qijing Bo, Guangping Zhang, Wei Zheng, Yujie Wen, Yilang Tang, Chuanyue Wang
We investigated the relationship between childhood trauma (CT) and sensorimotor gating in Chinese patients diagnosed with chronic schizophrenia. Seventy-five patients were assessed with the Childhood Trauma Questionnaire-Short Form (CTQ-SF), and then the modified paradigm, perceived spatial separation-induced prepulse inhibition (PSS PPI) and the perceived spatial co-location PPI (PSC PPI or classical PPI) were applied to test sensorimotor gating. Startling stimuli (90 dB) were presented either alone or preceded by discrete prepulse stimuli of 4 dB in a background 60-dB noise level...
January 31, 2018: Psychiatry Research
Zongdong Li, Natasha M Nesbitt, Lisa E Malone, Dimitri V Gnatenko, Song Wu, Daifeng Wang, Wei Zhu, Geoffrey D Girnun, Wadie F Bahou
Bioenergetic requirements of hematopoietic stem cells (HSC) and pluripotent stem cells (PSC) vary with lineage fate, and cellular adaptations rely largely on substrate (glucose/glutamine) availability and mitochondrial function to balance TCA-derived anabolic and redox-regulated antioxidant functions.  Heme synthesis and degradation converge in a linear pathway that utilizes TCA cycle-derived carbon in cataplerotic reactions of tetrapyrrole biosynthesis, terminated by NAD(P)H-dependent biliverdin reductases (IXα, BLVRA and IXβ, BLVRB) that lead to bilirubin generation and cellular antioxidant functions...
March 2, 2018: Biochemical Journal
Jia-Jhen Kang, Tsung-Yu Yang, Yi-Kang Lan, Wei-Ru Wu, Chun-Jen Su, Shih-Chang Weng, Norifumi L Yamada, An-Chung Su, U-Ser Jeng
Cathode buffer layers (CBLs) can effectively further the efficiency of polymer solar cells (PSCs), after optimization of the active layer. Hidden between the active layer and cathode of the inverted PSC device configuration is the critical yet often unattended vertical diffusion of the active layer components across CBL. Here, a novel methodology of contrast variation with neutron and anomalous X-ray reflectivity to map the multicomponent depth compositions of inverted PSCs, covering from the active layer surface down to the bottom of the ZnO-based CBL, is developed...
March 2, 2018: Small
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