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https://www.readbyqxmd.com/read/29043551/magi-1-expression-is-decreased-in-several-types-of-human-t-cell-leukemia-cell-lines-including-adult-t-cell-leukemia
#1
Takashi Kozakai, Masahiko Takahashi, Masaya Higuchi, Toshifumi Hara, Kousuke Saito, Yuetsu Tanaka, Masayoshi Masuko, Jun Takizawa, Hirohito Sone, Masahiro Fujii
Membrane-associated guanylate kinase with inverted orientation protein 1 (MAGI-1) is a cytoplasmic scaffold protein that interacts with various signaling molecules; it negatively controls the cell growth of various types of cells and positively controls cell-cell interaction. In T cells, MAGI-1 has been shown to inhibit Akt activity through its interaction with PTEN and MEK1. In this study we found that MAGI-1 expression is decreased in multiple (9 out of 15) human T-cell leukemia cell lines, including adult T-cell leukemia (ATL), T-cell acute lymphoblastic leukemia and chronic T-cell lymphocytic leukemia...
October 17, 2017: International Journal of Hematology
https://www.readbyqxmd.com/read/29042262/molecular-epidemiology-and-in-vitro-evidence-suggest-that-leishmania-braziliensis-strain-helps-determine-antimony-response-among-american-tegumenary-leishmaniasis-patients
#2
Silvana C Silva, Luiz Henrique Guimarães, Juliana A Silva, Viviane Magalhães, Lilian Medina, Adriano Queiroz, Paulo Roberto L Machado, Albert Schriefer
Antimony is the first line drug for treating American tegumentary leishmaniasis (ATL) in Brazil. In this country, Leishmania braziliensis causes at least three distinct forms of disease: localized cutaneous (CL), mucosal (ML) and disseminated leishmaniasis (DL). All forms can be found in Corte de Pedra, Northeast Brazil. ML and DL respond poorly to antimony, in contrast to CL. The L. braziliensis population causing ATL in Corte de Pedra is genetically very diverse, with strains of the parasite associating with the clinical form of leishmaniasis...
October 14, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28993637/htlv-1-bzip-factor-suppresses-tdp1-expression-through-inhibition-of-nrf-1-in-adult-t-cell-leukemia
#3
Yoko Takiuchi, Masayuki Kobayashi, Kohei Tada, Fumie Iwai, Maki Sakurada, Shigeki Hirabayashi, Kayoko Nagata, Kotaro Shirakawa, Keisuke Shindo, Jun-Ichirou Yasunaga, Yasuhiro Murakawa, Vinodh Rajapakse, Yves Pommier, Masao Matsuoka, Akifumi Takaori-Kondo
Adult T-cell leukemia (ATL) is an aggressive T-cell malignancy caused by human T-cell leukemia virus type 1 (HTLV-1). We recently reported that abacavir, an anti-HIV-1 drug, potently and selectively kills ATL cells. This effect was attributed to the reduced expression of tyrosyl-DNA-phosphodiesterase 1 (TDP1), a DNA repair enzyme, in ATL cells. However, the molecular mechanism underlying the downregulation of TDP1 in ATL cells remains elusive. Here we identified the core promoter of the TDP1 gene, which contains a conserved nuclear respiratory factor 1 (NRF-1) binding site...
October 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28978843/current-status-of-atl-research-efforts-for-prevention-and-precision-medicine-for-atl
#4
Toshiki Watanabe
The introduction of new agents and hematopoietic stem cell transplantation into the treatment of ATL has activated its clinical research. However, the prognosis of ATL remains poor compared with those of other leukemias and lymphomas. Thus, seemingly we have to reconsider a new strategy of ATL therapy based on its unique characteristics. HTLV-1 infection of T cells results in clonal proliferation of infected cells that accumulate genetic and epigenetic abnormalities before the onset of ATL. Therefore, the treatment strategy should include the prevention of HTLV-1 infection and ATL development in addition to precision medicine based on the stratification of ATL cases by biomarkers that discriminate clinical stages of ATL...
2017: [Rinshō Ketsueki] the Japanese Journal of Clinical Hematology
https://www.readbyqxmd.com/read/28978842/molecular-pathogenesis-and-its-therapeutic-implication-for-atl
#5
Kenji Ishitsuka
Adult T-cell leukemia/lymphoma (ATL) is a peripheral T-cell malignancy caused by human T-lymphotropic virus type I (HTLV-1). HTLV-1 related proteins Tax and HTLV-1 bZIP factor induce immortalization and transformation of HTLV-1-infected T-lymphocytes and eventually induce clonal proliferation. One of the apparent molecular features in ATL cells is abundant genomic abnormalities targeting characteristic pathways, including T-cell receptor signaling and the NF-κB pathway, G-protein coupled-receptor, including CCR4, and transcriptional regulation...
2017: [Rinshō Ketsueki] the Japanese Journal of Clinical Hematology
https://www.readbyqxmd.com/read/28978570/enhancer-profiling-identifies-critical-cancer-genes-and-characterizes-cell-identity-in-adult-t-cell-leukemia
#6
Regina Wan Ju Wong, Phuong Cao Thi Ngoc, Wei Zhong Leong, Alice Wei Yee Yam, Tinghu Zhang, Kaori Asamitsu, Shinsuke Iida, Takashi Okamoto, Ryuzo Ueda, Nathanael S Gray, Takashi Ishida, Takaomi Sanda
A number of studies have recently demonstrated that "super-enhancers", which are large cluster of enhancers typically marked by a high level of acetylation of histone H3 lysine 27 and mediator bindings, are frequently associated with genes that control and define cell identity during normal development. Super-enhancers are also often enriched at cancer genes in various malignancies. Identification of such enhancers would pinpoint critical factors that directly contribute to pathogenesis. Here, we performed enhancer profiling using primary leukemia samples from adult T-cell leukemia/lymphoma (ATL), which is a genetically heterogeneous intractable cancer...
October 4, 2017: Blood
https://www.readbyqxmd.com/read/28973318/astigmatism-and-refractive-outcome-after-late-in-the-bag-intraocular-lens-dislocation-surgery-a-randomized-clinical-trial
#7
RANDOMIZED CONTROLLED TRIAL
Olav Kristianslund, Atle Einar Østern, Liv Drolsum
Purpose: To compare surgically induced astigmatism (SIA) and refractive outcomes between two operation methods for late in-the-bag IOL dislocation. Methods: In this prospective, randomized, parallel-group clinical trial, 104 patients (eyes) were assigned to IOL repositioning by scleral suturing 1.5- to 2-mm posterior to limbus (n = 54) or IOL exchange with a retropupillar iris-claw IOL using a 5.5-mm scleral pocket incision (n = 50). The SIA was determined by vector analysis through conversion of corneal cylinders to Cartesian coordinates, and is presented as magnitude in diopters @ direction in degrees (D @ °)...
September 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28972812/antimicrobial-effects-of-three-different-treatment-modalities-on-dental-implant-surfaces
#8
Olav Inge Larsen, Morten Enersen, Anne Karin Kristoffersen, Ann Wennerberg, Dagmar F Bunæs, Stein Atle Lie, Knut N Leknes
Resolution of peri-implant inflammation and re-osseointegration of peri-implantitis affected dental implants seem to be dependent on bacterial decontamination. The aims of the this study were to evaluate the antimicrobial effects of three different instrumentations on a micro-textured dental implant surface contaminated with an avirulent or a virulent Porphyromonas gingivalis strain and to determine alterations to the implant surface following instrumentation. Forty-five dental implants (Straumann SLA) were allocated to three treatment groups: Er:YAG laser, chitosan brush, and titanium curette (10 implants each), a positive (10 implants) and a negative (five implants) control...
October 3, 2017: Journal of Oral Implantology
https://www.readbyqxmd.com/read/28969516/parents-perception-of-their-relationship-following-the-loss-of-a-child
#9
Atle Dyregrov, Kari Dyregrov
It is known that if one partner wants to talk after the loss of a child, while the other does not, the less satisfied they are with the relationship. The aim of this study was to increase our understanding of parental relationships following the loss of a child. A questionnaire on various aspects of the relationship was sent to 1,027 members of bereavement support organizations for parents who have lost children in Norway. The studied sample ( N = 285) consisted of 169 women (59.3%) and 116 men (40.7%), representing 175 couples...
November 2017: Omega
https://www.readbyqxmd.com/read/28968786/influence-of-leishmania-rna-virus-1-on-pro-inflammatory-biomarker-expression-in-a-human-macrophage-model-of-american-tegumentary-leishmaniasis
#10
Ruwandi Kariyawasam, Jugvinder Grewal, Rachel Lau, Andrew Purssell, Braulio M Valencia, Alejandro Llanos-Cuentas, Andrea K Boggild
Backgound: Species of the Leishmania Viannia subgenus harbour the double-stranded Leishmania RNA virus 1 (LRV-1), previously identified in isolates from Brazil and Peru. Higher levels of LRV-1 in metastasizing strains of L. V. guyanensis have been documented in both human and murine models, and correlated to disease severity. Methods: Expression of proinflammatory biomarkers, including IL-1β, TNF-α, CXCL10, CCL5, IL-6, and SOD, in human macrophages infected with 3 ATCC and 5 clinical isolates of L...
August 18, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28954709/visual-field-defects-following-different-resective-procedures-for-mesiotemporal-lobe-epilepsy
#11
Barbara Schmeiser, Moritz Daniel, Evangelos Kogias, Daniel Böhringer, Karl Egger, Shan Yang, Niels Alexander Foit, Andreas Schulze-Bonhage, Bernhard Jochen Steinhoff, Josef Zentner, Wolf Alexander Lagrèze, Nikolai Johannes Gross
INTRODUCTION: One of the most common side effects of mesiotemporal lobe resection in patients with medically intractable epilepsy are visual field defects (VFD). While peripheral defects usually remain unnoticed by patients, extended VFD influence daily life activities and can, in particular, affect driving regulations. This study had been designed to evaluate frequency and extent of VFD following different surgical approaches to the mesiotemporal area with respect to the ability to drive...
September 24, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28954352/-hsp90-inhibitor-17-aag-plays-an-important-role-in-jak3-stat5-signaling-pathways-in-htlv-1-infection-cell-line-hut-102
#12
Q Q Yang, H Tan, Z P Fu, Q Ma, J L Song
Objective: To analyze whether heat-shock protein 90 (HSP90) be involved in a permanently abnormal activated JAK/STAT signaling in ATL cells in vitro. Methods: The effect of 17-AAG on proliferation of ATL cell lines HUT-102 was assessed using CCK8 at different time points. Cell apoptosis was measured by flow cytometry. The specific proteins HSP90, STAT5, p-STAT5 and JAK3 were detected by Western blotting. Results: Overexpression of HSP90 in HUT-102 cell lines was disclosed (P<0.05) , and constitutive activation of JAK3/STAT5 signaling was observed in HTLV-1-infected T-cell lines but not in normal PBMCs; Treatment of ATL cell lines with 17-AAG led to reduced cell proliferation, but there was no significant change in terms of cell proliferation when the concentration of 17-AAG between 2 000-8 000 nmol/L (P>0...
August 14, 2017: Zhonghua Xue Ye Xue za Zhi, Zhonghua Xueyexue Zazhi
https://www.readbyqxmd.com/read/28954118/case-for-diagnosis-infective-dermatitis-associated-with-htlv-1-differential-diagnosis-of-atopic-dermatitis
#13
Lorena Maria Lima de Oliveira, Marcos Vilela de Souza, Antonio Carlos Martins Guedes, Marcelo Grossi Araújo
Infective dermatitis associated with HTLV-1 (IDH) is the main cutaneous marker of HTLV-1 infection. This disease occurs primarily in children and should be differentiated from other eczemas, especially from atopic dermatitis. The largest series of IDH are from Jamaica and Brazil. There are an estimated 15 to 20 million infected people in the world, and Brazil is one of the endemic regions. Studies suggest that IDH in children may be a marker for the development of T-cell leukemia/lymphoma (ATL) or myelopathy associated with HTLV-1/tropical spastic paraparesis (HAM / TSP) in adulthood...
July 2017: Anais Brasileiros de Dermatologia
https://www.readbyqxmd.com/read/28947005/a-mobile-application-to-support-collection-and-analytics-of-real-time-critical-care-data
#14
Akshay Vankipuram, Mithra Vankipuram, Vafa Ghaemmaghami, Vimla L Patel
BACKGROUND AND OBJECTIVES: Data collection, in high intensity environments, poses several challenges including the ability to observe multiple streams of information. These problems are especially evident in critical care, where monitoring of the Advanced Trauma Life Support (ATLS) protocol provides an excellent opportunity to study the efficacy of applications that allow for the rapid capture of event information, providing theoretically-driven feedback using the data. Our goal was, (a) to design and implement a way to capture data on deviation from the standard practice based on the theoretical foundation of error classification from our past research, (b) to provide a means to meaningfully visualize the collected data, and (c) to provide a proof-of-concept for this implementation, using some understanding of user experience in clinical practice...
November 2017: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/28927667/development-and-validation-of-a-tool-to-evaluate-the-evolution-of-clinical-reasoning-in-trauma-using-virtual-patients
#15
David Fleiszer, Michael L Hoover, Nancy Posel, Tarek Razek, Simon Bergman
CONTEXT: Undergraduate medical students at a large academic trauma center are required to manage a series of online virtual trauma patients as a mandatory exercise during their surgical rotation. PURPOSE: Clinical reasoning during undergraduate medical education can be difficult to assess. The purpose of the study was to determine whether we could use components of the students' virtual patient management to measure changes in their clinical reasoning over the course of the clerkship year...
September 16, 2017: Journal of Surgical Education
https://www.readbyqxmd.com/read/28920078/notch1-activation-depletes-the-pool-of-side-population-stem-cells-in-atl
#16
Xue Tao Bai, Chien-Hung Yeh, Christophe Nicot
BACKGROUND: HTLV-I infection is associated with the development of adult T-cell leukemia (ATL), a malignancy characterized by a high rate of disease relapse and poor survival. Previous studies reported the existence of side population (SP) cells in HTLV-I Tax transgenic mouse models. These studies showed that these ATL-like derived SP cells have both self-renewal and leukemia renewal capacity and represent Cancer Stem Cells (CSC)/Leukemia-Initiating Cells (LIC). Since CSC/LIC are resistant to conventional therapies, a better characterization is needed...
June 2017: Journal of Cancer Sciences
https://www.readbyqxmd.com/read/28916919/laparoscopic-liver-resection-for-metastatic-melanoma
#17
Davit L Aghayan, Airazat M Kazaryan, Åsmund Avdem Fretland, Mushegh A Sahakyan, Bård I Røsok, Bjørn Atle Bjørnbeth, Bjørn Edwin
BACKGROUND: Stage IV metastatic melanoma carries a poor prognosis. In the case of melanoma liver metastasis (MLM), surgical resection may improve survival and represents a therapeutic option, with varying levels of success. Laparoscopic liver resection (LLR) for metastatic melanoma is poorly studied. The aim of this study was to analyze the outcomes of LLR in patients with MLM. MATERIALS AND METHODS: Between April 2000 and August 2013, 11 (1 cutaneous, 9 ocular and 1 unknown primary) patients underwent LLR for MLM at Oslo University Hospital-Rikshospitalet and 13 procedures in total were carried out...
September 15, 2017: Surgical Endoscopy
https://www.readbyqxmd.com/read/28910576/impact-of-staphylococcus-aureus-regulatory-mutations-that-modulate-biofilm-formation-in-the-usa300-strain-lac-on-virulence-in-a-murine-bacteremia-model
#18
Joseph S Rom, Danielle N Atwood, Karen E Beenken, Daniel G Meeker, Allister J Loughran, Horace J Spencer, Tamara L Lantz, Mark S Smeltzer
Staphylococcus aureus causes acute and chronic forms of infection, the latter often associated with formation of a biofilm. It has previously been demonstrated that mutation of atl, codY, rot, sarA, and sigB limits biofilm formation in the USA300 strain LAC while mutation of agr, fur, and mgrA has the opposite effect. Here we used a murine sepsis model to assess the impact of these same loci in acute infection. Mutation of agr, atl, and fur had no impact on virulence, while mutation of mgrA and rot increased virulence...
September 14, 2017: Virulence
https://www.readbyqxmd.com/read/28910419/il-10-mediated-signals-act-as-a-switch-for-lymphoproliferation-in-human-t-cell-leukemia-virus-type-1-infection-by-activating-the-stat3-and-irf4-pathways
#19
Leila Sawada, Yoshiko Nagano, Atsuhiko Hasegawa, Hikari Kanai, Kai Nogami, Sayaka Ito, Tomoo Sato, Yoshihisa Yamano, Yuetsu Tanaka, Takao Masuda, Mari Kannagi
Human T-cell leukemia virus type-1 (HTLV-1) causes two distinct diseases, adult T-cell leukemia/lymphoma (ATL) and HTLV-1-associated myelopathy/tropical spastic paraparesis (HAM/TSP). Since there are no disease-specific differences among HTLV-1 strains, the etiological mechanisms separating these respective lymphoproliferative and inflammatory diseases are not well understood. In this study, by using IL-2-dependent HTLV-1-infected T-cell lines (ILTs) established from patients with ATL and HAM/TSP, we demonstrate that the anti-inflammatory cytokine IL-10 and its downstream signals potentially act as a switch for proliferation in HTLV-1-infected cells...
September 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28905463/epidemiological-and-clinical-features-of-adult-t-cell-leukemia-lymphoma-in-japan-2010-2011-a-nationwide-survey
#20
Kisato Nosaka, Masako Iwanaga, Yoshitaka Imaizumi, Kenji Ishitsuka, Kenichi Ishizawa, Yoji Ishida, Masahiro Amano, Takashi Ishida, Naokuni Uike, Atae Utsunomiya, Koichi Ohshima, Kazuhiro Kawai, Junji Tanaka, Yoshiki Tokura, Kensei Tobinai, Toshiki Watanabe, Kaoru Uchimaru, Kunihiro Tsukasaki
Adult T-cell leukemia-lymphoma (ATL) is a mature T-cell malignancy associated with human T-cell leukemia virus type 1 (HTLV-1) infection. Japan is the most endemic country for HTLV-1 and ATL in the world. Recent nationwide studies of Japanese blood donors reported that HTLV-1 carriers spread from endemic areas to non-endemic areas. Therefore, the latest information on nationwide epidemiological and clinical data for ATL is necessary to guide clinical practice. We undertook a multicenter, hospital-based survey of newly diagnosed ATL patients from 2010 to 2011...
September 14, 2017: Cancer Science
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