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https://www.readbyqxmd.com/read/29323213/high-temperature-quantum-oscillations-of-the-hall-resistance-in-bulk-bi2se3
#1
Marco Busch, Olivio Chiatti, Sergio Pezzini, Steffen Wiedmann, Jaime Sánchez-Barriga, Oliver Rader, Lada V Yashina, Saskia F Fischer
Helically spin-polarized Dirac fermions (HSDF) in protected topological surface states (TSS) are of high interest as a new state of quantum matter. In three-dimensional (3D) materials with TSS, electronic bulk states often mask the transport properties of HSDF. Recently, the high-field Hall resistance and low-field magnetoresistance indicate that the TSS may coexist with a layered two-dimensional electronic system (2DES). Here, we demonstrate quantum oscillations of the Hall resistance at temperatures up to 50 K in nominally undoped bulk Bi2Se3 with a high electron density n of about 2·1019 cm-3...
January 11, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29316479/response-of-cell-lines-to-actual-and-simulated-inoculation-with-cryptosporidium-proliferans
#2
Janka Melicherová, Lada Hofmannová, Andrea Valigurová
The need for an effective treatment against cryptosporidiosis has triggered studies in the search for a working in vitro model. The peculiar niche of cryptosporidia at the brush border of host epithelial cells has been the subject of extensive debates. Despite extensive research on the invasion process, it remains enigmatic whether cryptosporidian host-parasite interactions result from an active invasion process or through encapsulation. We used HCT-8 and HT-29 cell lines for in vitro cultivation of the gastric parasite Cryptosporidium proliferans strain TS03...
December 15, 2017: European Journal of Protistology
https://www.readbyqxmd.com/read/29273317/surface-coating-affects-uptake-of-silver-nanoparticles-in-neural-stem-cells
#3
Igor M Pongrac, Lada Brkić Ahmed, Hrvoje Mlinarić, Darija Domazet Jurašin, Ivan Pavičić, Ana Marija Marjanović Čermak, Mirta Milić, Srećko Gajović, Ivana Vinković Vrček
The rapid development and widespread applications of nanotechnology necessitates the design towards safe nanoparticles. Surface structure is among the most important physicochemical characteristics of metallic nanoparticles affecting their mode of action in certain biological or environmental compartments. This study aimed to investigate how different surface coatings affect the cytotoxicity and cellular uptake of silver nanoparticles (AgNPs) in murine neural stem cells (mNSCs). Different AgNPs were prepared by stabilisation with surface coatings encompassing sodium bis(2-ethylhexyl)-sulfosuccinate (AOT), cetyltrimethylammonium bromide (CTAB), poly(vinylpyrrolidone) (PVP), poly-l-lysine (PLL), and bovine serum albumin (BSA)...
December 16, 2017: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/29244997/beliefs-and-determinants-of-use-of-traditional-complementary-alternative-medicine-in-pediatric-patients-who-undergo-treatment-for-cancer-in-south-america
#4
Valeria Rocha, Elena J Ladas, Meiko Lin, Walter Cacciavillano, Elizabeth Ginn, Kara M Kelly, Guillermo Chantada, Luis Castillo
Purpose The use of traditional complementary/alternative medicine (TCAM) among children with cancer has been well documented. South America has a rich history of traditional healers and medicinal resources; however, little is known about the use of TCAM among children with cancer. We sought to investigate patterns, beliefs, and determinants of TCAM use among South American children with cancer. Methods A cross-sectional survey was administered to 199 children treated for cancer at institutions located in Buenos Aires, Argentina, and Montevideo, Uruguay...
December 2017: Journal of Global Oncology
https://www.readbyqxmd.com/read/29244989/global-use-of-traditional-and-complementary-medicine-in-childhood-cancer-a-systematic-review
#5
Caroline Diorio, Catherine G Lam, Elena J Ladas, Festus Njuguna, Glenn M Afungchwi, Katherine Taromina, Stacey Marjerrison
Purpose Traditional and complementary medicine (T&CM) strategies are commonly used in pediatric oncology. Patterns may vary based on country income. We systematically reviewed published studies describing T&CM use among pediatric oncology patients in low-income countries (LIC/LMIC), middle-income countries (UMIC), and high-income countries (HIC). Objectives included describing estimated prevalence of use, reasons for use, perceived effectiveness, modalities used, rates of disclosure, and reporting of delayed or abandoned treatment...
December 2017: Journal of Global Oncology
https://www.readbyqxmd.com/read/29223407/stat3-mediated-epigenetic-silencing-of-foxp3-in-lada-t-cells-is-regulated-through-hdac5-and-dnmt1
#6
Can Hou, Yanjun Zhong, Zhen Wang, Zhao Ming, Gan Huang, Lin Ouyang, Yijun Li, Qianjin Lu, Zhiguang Zhou
In LADA patients, Tregs are reduced and FOXP3 is downregulated in CD4+ T cells, but the etiology remains unclear. Our study included in 20 LADA patients and 20 healthy control patients. qRT-PCR results showed that STAT3, HDAC3, HDAC5, SIRT1, DNMT1 and DNMT3b mRNAs were significantly upregulated in LADA CD4+ T cells than controls, while FOXP3 mRNA significantly decreased. p-STAT3, STAT3, DNMT1 and DNMT3b expressions were increased demonstrated by western blot. ChIP-PCR suggested that p-STAT3 binds to the Foxp3 promoter, meanwhile, histone H3 acetylation at K9 and K14 of FOXP3 promoter were significantly lower than controls...
December 6, 2017: Clinical Immunology: the Official Journal of the Clinical Immunology Society
https://www.readbyqxmd.com/read/29220505/metabolic-characteristics-of-recently-diagnosed-adult-onset-autoimmune-diabetes-mellitus
#7
Oana P Zaharia, Pavel Bobrov, Klaus Strassburger, Kálmán Bódis, Yanislava Karusheva, Michaela Scholz, Daniel F Markgraf, Volker Burkart, Nanette C Schloot, Karsten Müssig, Julia Szendroedi, Michael Roden
Context and Objective: Among patients diagnosed with type 2 diabetes, autoimmune diabetes often remains undetected. Metabolic features of these patients are insufficiently characterized at present. Design, Setting and Patients: This study compared age- and sex-matched adult (41-62 years) humans with recent-onset diabetes: patients positive for antibodies against glutamic acid decarboxylase (GAD) and/or cytoplasmic islet-cell antigen with an insulin-free period of >6 months (ab+/ins-; previously termed latent autoimmune diabetes of adults, LADA), type 1 (ab+/ins+), type 2 diabetes (ab-/ins-) and glucose-tolerant humans (controls) of the German Diabetes Study (n=41/group)...
December 6, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29217651/interleukin-18-serum-level-is-elevated-in-type-2-diabetes-and-latent-autoimmune-diabetes
#8
Emanuela Zaharieva, Zdravko Kamenov, Tsvetelina Velikova, Adelina Tsakova, Yosif El-Darawish, Haruki Okamura
BACKGROUND: Interleukin-18 (IL-18) is an inflammatory cytokine found to be elevated in obesity, metabolic syndrome and type 2 diabetes (T2D) as a part of the chronic low-grade inflammatory process in these states. The aim of the study was to evaluate the interleukin level in patients with latent autoimmune diabetes of the adults (LADA) in comparison to that in T2D subjects. MATERIALS AND METHODS: IL-18 was analyzed through Enzyme-Linked Immunosorbent Assay in 76 participants with T2D and 24 with LADA and 14 control subjects...
December 7, 2017: Endocrine Connections
https://www.readbyqxmd.com/read/29214976/stray-cats-are-more-frequently-infected-with-zoonotic-protists-than-pet-cats
#9
Martin Kvac, Lada Hofmannova, Ynes Ortega, Nikola Holubova, Michaela Horcickova, Marta Kicia, Lenka Hlaskova, Dana Kvetonova, Bohumil Sak, John McEvoy
Faecal samples were collected from cats kept as pets (n = 120) and stray cats (n = 135) in Central Europe (Czech Republic, Poland and Slovakia) and screened for the presence of Cryptosporidium spp., Giardia intestinalis (Kunstler, 1882), Encephalitozoon spp. and Enterocytozoon bieneusi Desportes, Le Charpentier, Galian, Bernard, Cochand-Priollet, Lavergne, Ravisse et Modigliani, 1985 by PCR analysis of the small-subunit of rRNA (Cryptosporidium spp. and G. intestinalis) and ITS (microsporidia) genes. Sequence analysis of targeted genes revealed the presence of C...
December 6, 2017: Folia Parasitologica
https://www.readbyqxmd.com/read/29214584/personalized-medicine-what-s-in-it-for-rare-diseases
#10
Sebastian Schee Genannt Halfmann, Laura Mählmann, Lada Leyens, Matthias Reumann, Angela Brand
Personalised Medicine has become a reality over the last years. The emergence of 'omics' and big data has started revolutionizing healthcare. New 'omics' technologies lead to a better molecular characterization of diseases and a new understanding of the complexity of diseases. The approach of PM is already successfully applied in different healthcare areas such as oncology, cardiology, nutrition and for rare diseases. However, health systems across the EU are often still promoting the 'one-size fits all' approach, even if it is known that patients do greatly vary in their molecular characteristics and response to drugs and other interventions...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29205143/epidural-abscess-imitating-recurrent-pilonidal-sinus-a-case-report
#11
C Koutserimpas, N Nikitakis, A Skarpas, M Lada, E Papachristou, G Velimezis
Pilonidal sinus or pilonidal cyst is a common benign disease, affecting mostly young working men. We present the first case of an epidural abscess imitating pilonidal sinus. A 33-year old male, suffering from previously undiagnosed and untreated diabetes mellitus (DM), presented to our emergency department (ER), one month after open surgical treatment of pilonidal sinus, due to weakness and fever. After re-operation of the pilonidal cyst and due to post-operative pus production and continuation of fever a computer tomogr aphy (CT )scan was performed revealing an epidural abscess extending from the thoracic vertebrae 12 (T-12) to the sacrococcygeal area...
May 2017: Il Giornale di Chirurgia
https://www.readbyqxmd.com/read/29199561/antifungal-antioxidative-and-genoprotective-properties-of-extracts-from-the-blushing-bracket-mushroom-daedaleopsis-confragosa-agaricomycetes
#12
Aleksandar Knežević, Mirjana Stajić, Lada Živković, Ivan Milovanović, Biljana Spremo-Potparević, Jelena Vukojević
This study aimed to evaluate the antifungal, antioxidative, and genoprotective potentials of various extracts of Daedaleopsis confragosa fruiting bodies and mycelia. The extracts exhibited weak fungistatic and an absence of any fungicidal activities against 7 important animal and human pathogens. Although mycelial extracts, especially the hot water extract, were more effective antifungal agents than basidiocarp extracts, they were significantly weaker than the commercial antimycotic ketoconazole. The tested extracts reduced DPPH radicals to various extents, depending on the material used for extraction and the solvent...
2017: International Journal of Medicinal Mushrooms
https://www.readbyqxmd.com/read/29198334/mind-and-body-practices-for-fatigue-reduction-in-patients-with-cancer-and-hematopoietic-stem-cell-transplant-recipients-a-systematic-review-and-meta-analysis
#13
REVIEW
Nathan Duong, Hailey Davis, Paula D Robinson, Sapna Oberoi, Danielle Cataudella, S Nicole Culos-Reed, Faith Gibson, Miriam Götte, Pamela Hinds, Sanne L Nijhof, Deborah Tomlinson, Patrick van der Torre, Elena Ladas, Sandra Cabral, L Lee Dupuis, Lillian Sung
PURPOSE: To determine whether non-physical activity mind and body practices reduce the severity of fatigue in patients with cancer or hematopoietic stem cell transplant (HSCT) recipients compared to control interventions. METHODS: We included randomized trials which compared non-physical activity mind and body practices compared with control interventions for the management of fatigue in cancer and HSCT patients. RESULTS: Among 55 trials (4975 patients), interventions were acupuncture or acupressure (n=12), mindfulness (n=11), relaxation techniques (n=10), massage (n=6), energy therapy (n=5), energizing yogic breathing (n=3) and others (n=8)...
December 2017: Critical Reviews in Oncology/hematology
https://www.readbyqxmd.com/read/29187800/reference-intervals-for-six-salivary-cortisol-measures-based-on-the-croatian-late-adolescence-stress-study-class
#14
Daniela Šupe-Domić, Goran Milas, Lada Stanišić, Irena Drmić Hofman, Irena Martinović Klarić
Introduction: The aim of this nested study is to provide the reference intervals for already published measurements of salivary cortisol from the Croatian Adolescence Stress Study (CLASS). Material and methods: A total of 969 individuals (372 males and 597 females) were included in the reference sample (age range: 18-21 years). Salivary cortisol concentrations were determined by the enzyme immunoassay (LUCIO-Medical ELISA Salivary Cortisol Kit, Nal von Minden, Germany) in the Department of Medical Laboratory Diagnostics, University Hospital Split...
February 15, 2018: Biochemia Medica: časopis Hrvatskoga Društva Medicinskih Biokemičara
https://www.readbyqxmd.com/read/29182633/extensive-virologic-and-immunologic-characterization-in-an-hiv-infected-individual-following-allogeneic-stem-cell-transplant-and-analytic-cessation-of-antiretroviral-therapy-a-case-study
#15
Nathan W Cummins, Stacey Rizza, Mark R Litzow, Stephane Hua, Guinevere Q Lee, Kevin Einkauf, Tae-Wook Chun, Frank Rhame, Jason V Baker, Michael P Busch, Nicolas Chomont, Patrick G Dean, Rémi Fromentin, Ashley T Haase, Dylan Hampton, Sheila M Keating, Steven M Lada, Tzong-Hae Lee, Sekar Natesampillai, Douglas D Richman, Timothy W Schacker, Stephen Wietgrefe, Xu G Yu, Joseph D Yao, John Zeuli, Mathias Lichterfeld, Andrew D Badley
BACKGROUND: Notwithstanding 1 documented case of HIV-1 cure following allogeneic stem cell transplantation (allo-SCT), several subsequent cases of allo-SCT in HIV-1 positive individuals have failed to cure HIV-1 infection. The aim of our study was to describe changes in the HIV reservoir in a single chronically HIV-infected patient on suppressive antiretroviral therapy who underwent allo-SCT for treatment of acute lymphoblastic leukemia. METHODS AND FINDINGS: We prospectively collected peripheral blood mononuclear cells (PBMCs) by leukapheresis from a 55-year-old man with chronic HIV infection before and after allo-SCT to measure the size of the HIV-1 reservoir and characterize viral phylogeny and phenotypic changes in immune cells...
November 2017: PLoS Medicine
https://www.readbyqxmd.com/read/29176754/the-o-specific-polysaccharide-lyase-from-the-phage-lka1-tailspike-reduces-pseudomonas-virulence
#16
Tomasz Olszak, Mikhail M Shneider, Agnieszka Latka, Barbara Maciejewska, Christopher Browning, Lada V Sycheva, Anneleen Cornelissen, Katarzyna Danis-Wlodarczyk, Sofya N Senchenkova, Alexander S Shashkov, Grzegorz Gula, Michal Arabski, Slawomir Wasik, Konstantin A Miroshnikov, Rob Lavigne, Petr G Leiman, Yuriy A Knirel, Zuzanna Drulis-Kawa
Pseudomonas phage LKA1 of the subfamily Autographivirinae encodes a tailspike protein (LKA1gp49) which binds and cleaves B-band LPS (O-specific antigen, OSA) of Pseudomonas aeruginosa PAO1. The crystal structure of LKA1gp49 catalytic domain consists of a beta-helix, an insertion domain and a C-terminal discoidin-like domain. The putative substrate binding and processing site is located on the face of the beta-helix whereas the C-terminal domain is likely involved in carbohydrates binding. NMR spectroscopy and mass spectrometry analyses of degraded LPS (OSA) fragments show an O5 serotype-specific polysaccharide lyase specificity...
November 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29174985/role-of-p-glycoprotein-in-deoxynivalenol-mediated-in-vitro-toxicity
#17
Lada Ivanova, Christiane Kruse Fæste, Anita Solhaug
Deoxynivalenol (DON) is the most prevalent mycotoxin produced by grain-infecting Fusarium strains and frequently occurs in small cereals all over the world. After ingestion, DON is absorbed in the gut, which leads dose-dependently to critical health effects. In the present study, we have further investigated DON's previously reported affinity to the efflux transporter P-glycoprotein (Pgp) in the apical enterocyte membrane. Interaction with Pgp was studied in human colorectal adenocarcinoma (Caco-2) cells and Madin-Darby Canine Kidney wild-type (MDCKII-wt) and Pgp-overexpressing (MDCKII-MDR1) cells in different transport and cytotoxicity experiments...
November 23, 2017: Toxicology Letters
https://www.readbyqxmd.com/read/29171766/bioanalytical-methods-for-the-detection-of-antidiabetic-drugs-a-review
#18
Mariana Millan Fachi, Letícia Paula Leonart, Flávia Lada Degaut Pontes, Raquel de Oliveira Vilhena, Letícia Bonancio Cerqueira, Roberto Pontarolo
Type 2 diabetes mellitus, a disease which prevalence has been progressively increasing worldwide, is characterized by chronic hyperglycemia resulting from the combination of inappropriate insulin secretion and/or resistance to insulin action. If left uncontrolled, diabetes is associated with complications such as dysfunction and failure of various organs, and even premature death. Along with lifestyle-modification strategies, several classes of oral antidiabetic agents can be employed for glycemic control. Thus, therapeutic drug monitoring of these drugs is essential to maintain appropriate treatment...
December 2017: Bioanalysis
https://www.readbyqxmd.com/read/29171298/anti-platelet-effects-of-vitamin-supplements-in-age-related-macular-degeneration-an-in-vitro-study
#19
Marilita M Moschos, Konstantinos Laios, Sofia Androudi, Dimitrios S Ladas, Irini P Chatziralli
OBJECTIVE: The purpose of this experimental study was to investigate the role of vitamin supplements (Ocuvite, Vitalux Omega and Nutrof Total) as possible inhibitors of the onset of Age-Related Macular Degeneration (AMD). MATERIALS AND METHODS: The anti-aggregating effect of each vitamin was determined against four accumulative factors namely, Platelet Activating Factor (PAF), Adenosine diphosphate (ADP), Thrombin Receptor-activating Peptide (TRAP) and Arachidonic Acid (AA) in the Platelet Rich Plasma (PRP) of healthy volunteers...
November 24, 2017: Cutaneous and Ocular Toxicology
https://www.readbyqxmd.com/read/29165357/new-metabolites-of-coumarin-detected-in-human-urine-using-ultra-performance-liquid-chromatography-quadrupole-time-of-flight-tandem-mass-spectrometry
#20
Letícia Paula Leonart, João Cleverson Gasparetto, Flávia Lada Degaut Pontes, Letícia Bonancio Cerqueira, Thais Martins Guimarães de Francisco, Roberto Pontarolo
Coumarin (1,2-benzopyrone) is a natural compound whose metabolism in humans was established in the 1970s. However, a new metabolite was recently identified in human plasma, indicating that the metabolism of coumarin has not been completely elucidated. To complement the knowledge of its metabolism, a rapid and sensitive method using UPLC-QTOF-MS was developed. A total of 12 metabolites was identified using MetaboLynxTM software, including eight metabolites not previously reported in human urine. The identified biotransformation included hydroxylation, glucuronidation, sulfation, methylation, and conjugation with N-acetylcysteine...
November 22, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
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