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https://www.readbyqxmd.com/read/29187045/terminal-deoxynucleotidyl-transferase-tdt-negative-lymphoblastic-leukemia-in-pediatric-patients-incidence-and-clinical-significance
#1
Sayeeda Yasmeen, Anita Rajkumar, Heather Grossman, Arpad Szallasi
Pediatric terminal deoxynucleotidyl tranferase (TdT)-negative precursor B- or T-lymphoblastic leukemia/lymphoma (B-LL and T-LL) cases are rare and their prognostic significance remains controversial. We aimed to determine the frequency of TdT-negative B- and T-LL in the community hospital setting. Between 2005 and 2015, 43 pediatric patients were diagnosed with lymphoblastic leukemia at our institution, of which 6 (14%) were characterized as TdT-negative by flow cytometric analysis. Four of these 6 patients had B-LL and the other 2 had T-LL...
January 1, 2017: Pediatric and Developmental Pathology
https://www.readbyqxmd.com/read/29177699/a-phase-ic-study-evaluating-the-safety-tolerability-pharmacokinetics-and-cognitive-outcomes-of-bi-409306-in-patients-with-mild-to-moderate-schizophrenia
#2
David Brown, Kristen Daniels, Solen Pichereau, Michael Sand
INTRODUCTION: This randomized, double-blind, parallel-group study investigated the safety, tolerability, pharmacokinetics (PK), and cognitive outcomes of BI 409306-a selective phosphodiesterase 9A (PDE9A) inhibitor-in patients with schizophrenia. METHODS: Patients with mild-to-moderate schizophrenia were randomized (1:1:1:1) to receive BI 409306 at 25, 50, or 100 mg or placebo once daily over 14 days. The primary endpoints were safety and tolerability; the secondary endpoints were PK and cognitive outcomes...
November 24, 2017: Neurology and Therapy
https://www.readbyqxmd.com/read/29175293/depression-symptoms-and-reasons-for-gambling-sequentially-mediate-the-associations-between-insecure-attachment-styles-and-problem-gambling
#3
Matthew T Keough, Trinda L Penniston, Natalie Vilhena-Churchill, R Michael Bagby, Lena C Quilty
One of the central pathways to problem gambling (PG) is gambling to cope with negative moods, which is a cardinal feature of depression. Insecure attachment styles are also etiologically related to depression; and, therefore, by extension, those who are insecurely attached may engage in excessive gambling behaviors to cope with depression. In this study, we aimed to evaluate this and to this end predicted that depression severity and coping motives for gambling would conjointly mediate the relations between insecure attachment styles and PG...
November 14, 2017: Addictive Behaviors
https://www.readbyqxmd.com/read/29168441/detection-of-hev-specific-antibodies-in-four-non-human-primate-species-including-great-apes-from-different-zoos-in-germany
#4
C Spahr, T Knauf-Witzens, L Dähnert, M Enders, M Müller, R Johne, R G Ulrich
The hepatitis E virus (HEV) has been described in humans and various animal species in different regions of the world. However, the knowledge on natural HEV infection in non-human primates and the corresponding risk of zoonotic transmission is scarce. To determine whether primates in captivity are affected by HEV infection, we investigated 259 individual sera of clinically healthy non-human primates of 14 species from nine German zoos. Using a commercial double-antigen-sandwich ELISA and a commercial IgG ELISA, 10 animals (3·9%) reacted positive in at least one assay...
November 23, 2017: Epidemiology and Infection
https://www.readbyqxmd.com/read/29167333/authentic-patient-derived-hepatitis-c-virus-infects-and-productively-replicates-in-primary-cd4-and-cd8-t-lymphocytes-in-vitro
#5
Georgia Skardasi, Annie Y Chen, Tomasz I Michalak
Accumulated evidence indicates that immune cells can support replication of hepatitis C virus (HCV) in infected patients and in culture. However, there is a scarcity of data on the degree to which individual immune cell types support HCV propagation and on characteristics of virus assembled. We investigated the ability of authentic, patient-derived HCV to infect in vitro two closely related but functionally distinct immune cell types, CD4+ and CD8+ T lymphocytes, and assessed properties of virus produced by these cells...
November 22, 2017: Journal of Virology
https://www.readbyqxmd.com/read/29164209/tuning-the-cytotoxicity-of-ruthenium-ii-para-cymene-complexes-by-mono-substitution-at-a-triphenylphosphine-phenoxydiphenylphosphine-ligand
#6
Lorenzo Biancalana, Stefano Zacchini, Nicola Ferri, Maria Giovanna Lupo, Guido Pampaloni, Fabio Marchetti
The new complexes [RuCl2(η(6)-p-cymene)(κP-Ph2PR)] [R = 4-C6H4OSiMe2(t)Bu, 1; R = 4-C6H4Br, 2; R = OC([double bond, length as m-dash]O)CHCl2, 3; R = OPh, 4; R = O(2-C6H4SiMe2(t)Bu), 5] and [Ru(C2O4)(η(6)-p-cymene){κP-Ph2PO(2-C6H4(SiMe2(t)Bu))}], 6, were obtained in 83-98% yield from Ru(ii) arene precursors by three different synthetic strategies. The unprecedented phosphine Ph2P(O(2-C6H4SiMe2(t)Bu)) was synthesized in 86% yield from 2-C6H4Br(OSiMe2(t)Bu) and Ph2PCl, via intramolecular oxygen to carbon 1,3 migration of the silyl group (retro-Brook rearrangement)...
November 22, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29162920/the-corepressor-ncor1-regulates-the-survival-of-single-positive-thymocytes
#7
Lena Müller, Daniela Hainberger, Valentina Stolz, Patricia Hamminger, Hammad Hassan, Teresa Preglej, Nicole Boucheron, Shinya Sakaguchi, G Jan Wiegers, Andreas Villunger, Johan Auwerx, Wilfried Ellmeier
Nuclear receptor corepressor 1 (NCOR1) is a transcriptional regulator bridging repressive chromatin modifying enzymes with transcription factors. NCOR1 regulates many biological processes, however its role in T cells is not known. Here we show that Cd4-Cre-mediated deletion of NCOR1 (NCOR1 cKO(Cd4)) resulted in a reduction of peripheral T cell numbers due to a decrease in single-positive (SP) thymocytes. In contrast, double-positive (DP) thymocyte numbers were not affected in the absence of NCOR1. The reduction in SP cells was due to diminished survival of NCOR1-null postselection TCRβ(hi)CD69(+) and mature TCRβ(hi)CD69(-) thymocytes...
November 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29155103/rasgrp1-mutation-in-autoimmune-lymphoproliferative-syndrome-like-disease
#8
Huawei Mao, Wanling Yang, Sylvain Latour, Jing Yang, Sarah Winter, Jian Zheng, Ke Ni, Minmin Lv, Chenjing Liu, Hongmei Huang, Koon-Wing Chan, Pamela Pui-Wah Lee, Wenwei Tu, Alain Fischer, Yu-Lung Lau
BACKGROUND: Autoimmune lymphoproliferative syndrome (ALPS) is a genetic disorder of lymphocyte homeostasis due to impaired apoptosis. It was initially regarded as a very rare disease, but recent studies show it may be more common than previously thought. Defects in a couple of genes have been identified in a proportion of ALPS patients, but around one third of such patients remain undefined genetically. OBJECTIVE: We described two siblings presenting with ALPS-like disease...
November 15, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29143707/effect-of-multi-micronutrient-fortified-rice-on-cognitive-performance-depends-on-premix-composition-and-cognitive-function-tested-results-of-an-effectiveness-study-in-cambodian-schoolchildren
#9
Marion Fiorentino, Marlène Perignon, Khuov Kuong, Richard de Groot, Megan Parker, Kurt Burja, Marjoleine A Dijkhuizen, Sek Sokhom, Chhoun Chamnan, Jacques Berger, Frank T Wieringa
OBJECTIVE: Even though current policy is strongly focused on the crucial first '1000 days', it might be still possible to enhance cognitive function during the pre-adolescent and adolescent years by improving micronutrient status. In Cambodia, nutritional status is poor. Provision of rice fortified with micronutrients through a school meal programme (SMP) could be a cost-effective strategy to help improve health and school performance. The present study aimed to evaluate the effect of three different micronutrient-fortified rice formulations on cognitive function in Cambodian children...
November 16, 2017: Public Health Nutrition
https://www.readbyqxmd.com/read/29139200/allosteric-mechanism-of-quinoline-inhibitors-for-hiv-rt-associated-rnase-with-md-simulation-and-dynamics-fluctuation-network
#10
Yi Cai, Hao Liu, Haifeng Chen
The human immunodeficiency virus (HIV) is a retrovirus which infects T lymphocyte of human body and causes Immunodeficiency. Reverse transcriptase inhibitors (RTIs) can inhibit some functions of RT, preventing virus synthesis (double-stranded DNA), so that HIV virus replication can be reduced. Experimental results indicate a series of benzimidazole-based inhibitors which target HIV RT-associate RNase to inhibit the reverse transcription of HIV virus. However, the allosteric mechanism is still unclear. Here, molecular dynamics simulations and dynamics fluctuation network analysis were used to reveal the binding mode between the inhibitors and RT-associate RNase...
November 15, 2017: Chemical Biology & Drug Design
https://www.readbyqxmd.com/read/29128969/in-vasculitis-of-small-muscular-arteries-activation-of-vessel-infiltrating-cd8-t-cells-seems-to-be-antigen-independent
#11
Mikiko Kobayashi, Eisaku Ogawa, Ryuhei Okuyama, Hiroyuki Kanno
The etiology of polyarteritis nodosa (PAN) and localized PAN is still unknown, although a T cell-mediated immune mechanism has been considered. CD8 T cells participate not only in the antigen-dependent adaptive immune system, but also in the antigen-independent innate immune system. Non-antigen-activated CD8 T cells express a unique phenotype: granzyme B (GrB) positive /CD25 negative /programmed death-1 (PD-1) negative. The aims of this study were to assess the participation of T cells, especially innate CD8 T cells, in the development of vasculitis...
November 11, 2017: Virchows Archiv: An International Journal of Pathology
https://www.readbyqxmd.com/read/29122426/anatomical-factors-contributing-to-radial-nerve-excursion-at-the-brachium-a-cadaveric-study
#12
Wayne A Chen, T David Luo, Michael D Wigton, Zhongyu Li
PURPOSE: The radial nerve appears to be more vulnerable to injury in the brachium than the median and ulnar nerves. The underlying mechanism for this increased vulnerability is not well explained. We hypothesize that the radial nerve has less excursion than the median and ulnar nerves because it is anatomically tethered by the lateral intermuscular septum (LIS) and that elbow positioning and LIS release will improve its excursion. METHODS: Eight paired fresh-frozen cadaveric upper extremity specimens were used...
November 7, 2017: Journal of Hand Surgery
https://www.readbyqxmd.com/read/29119138/giant-positive-magnetoresistance-in-half-metallic-double-perovskite-sr2crwo6-thin-films
#13
Ji Zhang, Wei-Jing Ji, Jie Xu, Xiao-Yu Geng, Jian Zhou, Zheng-Bin Gu, Shu-Hua Yao, Shan-Tao Zhang
Magnetoresistance (MR) is the magnetic field-induced change of electrical resistance. The MR effect not only has wide applications in hard drivers and sensors but also is a long-standing scientific issue for complex interactions. Ferromagnetic/ferrimagnetic oxides generally show negative MR due to the magnetic field-induced spin order. We report the unusually giant positive MR up to 17,200% (at 2 K and 7 T) in 12-nm Sr2CrWO6 thin films, which show metallic behavior with high carrier density of up to 2.26 × 10(28) m(-3) and high mobility of 5...
November 2017: Science Advances
https://www.readbyqxmd.com/read/29116298/in-situ-effect-of-titanium-tetrafluoride-varnish-on-enamel-demineralization
#14
Adílis Kalina Alexandria, Camila Nassur, Carolina Bezerra Cavalcanti Nóbrega, Ana Maria Gondim Valença, Pedro Luiz Rosalen, Lucianne Cople Maia
The effect of a 4% titanium tetrafluoride (TiF 4 ) varnish on enamel demineralization was evaluated. Twelve volunteers participated in this double-blind, randomized crossover study. Six enamel specimens were positioned in intraoral appliances throughout four treatment stages: 4% TiF 4 varnish (experimental varnish), 5% sodium fluoride (NaF) varnish (Duraphat ® ), placebo varnish, and negative control (deionized water). After 24 h, the varnishes were removed and plaques were allowed to accumulate. A 20% sucrose solution was dripped onto enamel blocks (10x/day)...
November 6, 2017: Brazilian Oral Research
https://www.readbyqxmd.com/read/29111983/acute-flare-of-bullous-pemphigus-with-pembrolizumab-used-for-treatment-of-metastatic-urothelial-cancer
#15
Rohan Garje, Justin J Chau, Jina Chung, Karolyn Wanat, Yousef Zakharia
In the past decade, the resurgence of immunotherapy has changed the landscape of cancer therapy. Checkpoint inhibitors targeting cytotoxic T-lymphocyte antigen-4, programmed death-1 on lymphocytes, and programmed death ligand-1 on tumors cells are currently utilized in the management of several cancers. These agents are double-edged sword with the positive effect being robust antitumor response but on the other side they can throttle up the normal immunologic homeostasis in a negative way, leading to adverse autoimmune toxicities...
November 3, 2017: Journal of Immunotherapy
https://www.readbyqxmd.com/read/29105157/reduced-numbers-of-mature-medullary-thymic-epithelial-cells-in-skg-mice
#16
Robby Engelmann, Andra Biemelt, Anja Johl, Daniela Kuthning, Brigitte Müller-Hilke
Attenuated T cell receptor (TCR) signaling contributes to the susceptibility for autoimmunity as shown via mutants of PTPN22 and Zap70 genes. We here set out to investigate the effect of an attenuated TCR signal on the composition of the thymic epithelial cell (TEC) compartment. To that extent, we combined flow cytometry and histology and compared the TEC subpopulations of Zap70 wild type with SKG mutant mice. We found an increased cortical TEC compartment in SKG thymi at the expense of reduced numbers of mature medullary TECs and a 4...
November 3, 2017: Scandinavian Journal of Immunology
https://www.readbyqxmd.com/read/29099972/factors-influencing-the-cardiovascular-response-to-subanesthetic-ketamine-a-randomized-placebo-controlled-trial
#17
Thomas Liebe, Shijia Li, Anton Lord, Lejla Colic, Anna Linda Krause, Anil Batra, Moritz A Kretzschmar, Catherine M Sweeney-Reed, Gusalija Behnisch, Björn H Schott, Martin Walter
Background: The increasing use of ketamine as a potential rapid-onset antidepressant necessitates a better understanding of its effects on blood pressure and heart rate, well-known side effects at higher doses. For the subanesthetic dose used for depression, potential predictors of these cardiovascular effects are important factors influencing clinical decisions. Since ketamine influences the sympathetic nervous system, we investigated the impact of autonomic nervous system-related factors on the cardiovascular response: a genetic polymorphism in the norepinephrine transporter and gender effects...
November 1, 2017: International Journal of Neuropsychopharmacology
https://www.readbyqxmd.com/read/29099628/murine-cd8-invariant-natural-killer-t-cells-are-negatively-selected-by-cd1d-expressed-on-thymic-epithelial-cells-and-dendritic-cells
#18
Sejin Oh, Hyunji Lee, Jung Hoon Shin, Changwan Hong, Se-Ho Park
BACKGROUND: CD1d-dependent invariant natural killer (iNKT) cells are found as either CD4 single positive (SP) or CD4/CD8 double negative (DN) cells in mice. The size of the CD8(+) iNKT population is extremely small. It is known that CD1d expression on developing thymocytes is sufficient for iNKT development and co-receptor choice, which is driven by Th-POK expression. This study aimed to examine the factors involved in the CD4/CD8 co-receptor choice of iNKT cells in addition to Th-POK-driven silencing of CD8 expression...
November 3, 2017: Immunological Investigations
https://www.readbyqxmd.com/read/29096894/experimental-therapy-of-advanced-breast-cancer-targeting-nfat1-mdm2-p53-pathway
#19
Jiang-Jiang Qin, Wei Wang, Ruiwen Zhang
Advanced breast cancer, especially advanced triple-negative breast cancer, is typically more aggressive and more difficult to treat than other breast cancer phenotypes. There is currently no curable option for breast cancer patients with advanced diseases, highlighting the urgent need for novel treatment strategies. We have recently discovered that the nuclear factor of activated T cells 1 (NFAT1) activates the murine double minute 2 (MDM2) oncogene. Both MDM2 and NFAT1 are overexpressed and constitutively activated in breast cancer, particularly in advanced breast cancer, and contribute to its initiation, progression, and metastasis...
2017: Progress in Molecular Biology and Translational Science
https://www.readbyqxmd.com/read/29093152/pomalidomide-in-patients-with-interstitial-lung-disease-due-to-systemic-sclerosis-a-phase-ii-multicenter-randomized-double-blind-placebo-controlled-parallel-group-study
#20
Vivien M Hsu, Christopher P Denton, Robyn T Domsic, Daniel E Furst, Maureen Rischmueller, Marina Stanislav, Virginia D Steen, Jörg H W Distler, Shimon Korish, Alyse Cooper, Suktae Choi, Peter H Schafer, Gerald Horan, Douglas R Hough
OBJECTIVE: To evaluate the safety and efficacy of pomalidomide (POM) on forced vital capacity (FVC), modified Rodnan skin score (mRSS), and gastrointestinal (GI) symptomatology over 52 weeks of treatment in patients with interstitial lung disease due to systemic sclerosis (SSc). METHODS: Twenty-three adult patients diagnosed with SSc were randomized 1:1 POM:placebo (PBO). RESULTS: Mean change at Week 52 from baseline in predicted FVC% -5.2 and -2...
November 1, 2017: Journal of Rheumatology
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