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https://www.readbyqxmd.com/read/29449053/genetic-and-epigenetic-alterations-in-the-tumour-tumour-margins-and-normal-buccal-mucosa-of-patients-with-oral-cancer
#1
N Eljabo, N Nikolic, J Carkic, D Jelovac, M Lazarevic, N Tanic, J Milasin
Despite adequate surgical resection, oral squamous cell carcinoma (OSCC) shows a high rate of recurrence and metastasis, which could be explained by the presence of molecular alterations in seemingly normal tumour margins and the entire oral mucosa. The aims of this study were (1) to assess the presence of gene amplification (c-Myc and HER2) and promoter methylation (p14 and p16) in the tumours, tumour margins, and unaffected oral mucosa of 40 OSCC patients, and (2) to evaluate the possibility of using these alterations as prognostic markers...
February 12, 2018: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29396481/conserved-dna-methylation-signatures-in-early-maternal-separation-and-in-twins-discordant-for-co2-sensitivity
#2
Francesca Giannese, Alessandra Luchetti, Giulia Barbiera, Valentina Lampis, Claudio Zanettini, Gun Peggy Knudsen, Simona Scaini, Dejan Lazarevic, Davide Cittaro, Francesca R D'Amato, Marco Battaglia
Respiratory and emotional responses to blood-acidifying inhalation of CO2 are markers of some human anxiety disorders, and can be enhanced by repeatedly cross-fostering (RCF) mouse pups from their biological mother to unrelated lactating females. Yet, these dynamics remain poorly understood. We show RCF-associated intergenerational transmission of CO2 sensitivity in normally-reared mice descending from RCF-exposed females, and describe the accompanying alterations in brain DNA methylation patterns. These epigenetic signatures were compared to DNA methylation profiles of monozygotic twins discordant for emotional reactivity to a CO2 challenge...
February 2, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29396400/diffraction-based-hanbury-brown-and-twiss-interferometry-at-a-hard-x-ray-free-electron-laser
#3
O Yu Gorobtsov, N Mukharamova, S Lazarev, M Chollet, D Zhu, Y Feng, R P Kurta, J-M Meijer, G Williams, M Sikorski, S Song, D Dzhigaev, S Serkez, A Singer, A V Petukhov, I A Vartanyants
X-ray free-electron lasers (XFELs) provide extremely bright and highly spatially coherent x-ray radiation with femtosecond pulse duration. Currently, they are widely used in biology and material science. Knowledge of the XFEL statistical properties during an experiment may be vitally important for the accurate interpretation of the results. Here, for the first time, we demonstrate Hanbury Brown and Twiss (HBT) interferometry performed in diffraction mode at an XFEL source. It allowed us to determine the XFEL statistical properties directly from the Bragg peaks originating from colloidal crystals...
February 2, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29394490/enzymatic-and-bactericidal-activity-of-myeloperoxidase-in-conditions-of-halogenative-stress
#4
Tatyana V Vakhrusheva, Daria V Grigorieva, Irina V Gorudko, Alexey Sokolov, Valeria A Kostevich, Vassili N Lazarev, Vadim B Vasilyev, Sergey N Cherenkevich, Oleg M Panasenko
Myeloperoxidase (MPO), found mainly in neutrophils, is released in inflammation. MPO produces reactive halogen species (RHS) which are bactericidal agents. However, RHS overproduction, i.e. halogenative stress, can also damage host biomolecules, and MPO itself may be targeted by RHS. Therefore, we examined the susceptibility of MPO to inactivation by its primary products (HOCl, HOBr, HOSCN) and secondary products such as taurine monochloramine (TauCl) and monobromamine (TauBr). MPO was dose-dependently inhibited up to complete inactivity by treatment with HOCl or HOBr...
February 2, 2018: Biochemistry and Cell Biology, Biochimie et Biologie Cellulaire
https://www.readbyqxmd.com/read/29361893/discovery-of-novel-antimicrobial-peptides-a-transcriptomic-study-of-the-sea-anemone-cnidopus-japonicus
#5
Ekaterina N Grafskaia, Nadezhda F Polina, Vladislav V Babenko, Daria D Kharlampieva, Pavel A Bobrovsky, Valentin A Manuvera, Tatyana E Farafonova, Nikolay A Anikanov, Vassili N Lazarev
As essential conservative component of the innate immune systems of living organisms, antimicrobial peptides (AMPs) could complement pharmaceuticals that increasingly fail to combat various pathogens exhibiting increased resistance to microbial antibiotics. Among the properties of AMPs that suggest their potential as therapeutic agents, diverse peptides in the venoms of various predators demonstrate antimicrobial activity and kill a wide range of microorganisms. To identify potent AMPs, the study reported here involved a transcriptomic profiling of the tentacle secretion of the sea anemone Cnidopus japonicus...
January 3, 2018: Journal of Bioinformatics and Computational Biology
https://www.readbyqxmd.com/read/29352094/auditory-brainstem-function-in-microcephaly-related-to-zika-virus-infection
#6
Dimitri Marques Abramov, Tania Saad, Saint-Clair Gomes-Junior, Daniel de Souza E Silva, Izabel Araújo, Maria Elizabeth Lopes Moreira, Vladimir V Lazarev
OBJECTIVE: To study the effect of prenatal Zika virus (ZV) infection on brainstem function reflected in brainstem auditory evoked potentials (BAEPs). METHODS: In a cross-sectional study in 19 children (12 girls) with microcephaly related to ZV infection, aged between 12 and 62 weeks, the brainstem function was examined through BAEPs. The latencies of wave peaks I, III, and V of the left and right ears (n = 37) were standardized according to normative data, and compared between them by 2-tailed t test...
January 19, 2018: Neurology
https://www.readbyqxmd.com/read/29348557/sensitizing-tumor-cells-to-conventional-drugs-hsp70-chaperone-inhibitors-their-selection-and-application-in-cancer-models
#7
Vladimir F Lazarev, Dmitry V Sverchinsky, Elena R Mikhaylova, Pavel I Semenyuk, Elena Y Komarova, Sergey A Niskanen, Alina D Nikotina, Anton V Burakov, Viktor G Kartsev, Irina V Guzhova, Boris A Margulis
Hsp70 chaperone controls proteostasis and anti-stress responses in rapidly renewing cancer cells, making it an important target for therapeutic compounds. To date several Hsp70 inhibitors are presented with remarkable anticancer activity, however their clinical application is limited by the high toxicity towards normal cells. This study aimed to develop assays to search for the substances that reduce the chaperone activity of Hsp70 and diminish its protective function in cancer cells. On our mind the resulting compounds alone should be safe and function in combination with drugs widely employed in oncology...
January 18, 2018: Cell Death & Disease
https://www.readbyqxmd.com/read/29331341/effects-of-the-gut-liver-axis-on-ischemia-mediated-hepatocellular-carcinoma-recurrence-in-the-mouse-liver
#8
Lorenzo A Orci, Stéphanie Lacotte, Vaihere Delaune, Florence Slits, Graziano Oldani, Vladimir Lazarevic, Carlo Rossetti, Laura Rubbia-Brandt, Philippe Morel, Christian Toso
BACKGROUND & AIMS: There is growing evidence that liver graft ischemia-reperfusion (I/R) is a risk factor for hepatocellular carcinoma (HCC) recurrence, but the involved mechanisms are unclear. Here, we tested the hypothesis that mesenteric congestion due to portal blood flow interruption induces endotoxin-mediated Toll-Like Receptor 4 (Tlr4) engagement, resulting in elevated liver cancer burden. We also assessed the role of remote ischemic preconditioning (RIPC) in this context. METHODS: C57Bl/6j mice were exposed to standardized models of liver I/R injury and RIPC, by occluding hepatic and femoral blood vessels...
January 10, 2018: Journal of Hepatology
https://www.readbyqxmd.com/read/29319928/low-dose-rate-brachytherapy-for-prostate-cancer-outcomes-beyond-10-years-of-follow-up
#9
S Lazarev, M R Thompson, N N Stone, R G Stock
OBJECTIVES: To examine biochemical control, survival, and late morbidity with definitive low-dose-rate brachytherapy (LDR-BT) for prostate cancer patients surviving ≥10 years post-treatment. MATERIALS AND METHODS: We identified 757 men with localized prostate cancer who underwent definitive LDR-BT in the period 1990-2006 and were followed for ≥10 years at our institution. Biochemical failure-free survival (BFFS), distant metastases-free survival (DMFS), disease-specific survival (DSS), and overall survival (OS) were selected as study endpoints...
January 10, 2018: BJU International
https://www.readbyqxmd.com/read/29296851/agonistic-targeting-of-tlr1-tlr2-induces-p38-mapk-dependent-apoptosis-and-nf%C3%AE%C2%BAb-dependent-differentiation-of-aml-cells
#10
Mia Eriksson, Pablo Peña-Martínez, Ramprasad Ramakrishnan, Marion Chapellier, Carl Högberg, Gabriella Glowacki, Christina Orsmark-Pietras, Talía Velasco-Hernández, Vladimir Lj Lazarević, Gunnar Juliusson, Jörg Cammenga, James C Mulloy, Johan Richter, Thoas Fioretos, Benjamin L Ebert, Marcus Järås
Acute myeloid leukemia (AML) is associated with poor survival, and there is a strong need to identify disease vulnerabilities that might reveal new treatment opportunities. Here, we found that Toll-like receptor 1 (TLR1) and TLR2 are upregulated on primary AML CD34+CD38- cells relative to corresponding normal bone marrow cells. Activating the TLR1/TLR2 complex by the agonist Pam3CSK4 in MLL-AF9-driven human AML resulted in induction of apoptosis by p38 MAPK-dependent activation of Caspase 3 and myeloid differentiation in a NFκB-dependent manner...
October 24, 2017: Blood Advances
https://www.readbyqxmd.com/read/29261515/integrative-approach-to-psoriasis-vulgaris
#11
Milanka Ljubenovic, Viktor Lazarevic, Masa Golubovic, Ivana Binic
In this article, we present a literature review of the most popular and commonly used therapeutic procedures belonging to complementary and alternative medicine, which is part of the modern concept of integrative medicine, used in the treatment of psoriasis. Psoriasis is a chronic, systemic, inflammatory disease wherein skin changes are the most visible sign. It occurs in approximately 1% to 3% of the world population, and the National Psoriasis Foundation of the United States estimates the number of patients in the whole world at about 125 million...
December 19, 2017: Holistic Nursing Practice
https://www.readbyqxmd.com/read/29245175/development-and-testing-of-a-hybrid-measure-of-muscle-strength-in-juvenile-dermatomyositis-for-use-in-routine-care
#12
Giulia Camilla Varnier, Silvia Rosina, Cristina Ferrari, Angela Pistorio, Alessandro Consolaro, Francesca Bovis, Sara Dalprà, Clarissa Pilkington, Susan Maillard, Adele Civino, Elena Tsitsami, Jaime de Inocencio, Marija Jelusic, Jelena Vojinovic, Graciela Espada, Balahan Makay, Maria Martha Katsicas, Polixeni Pratsidou-Gertsi, Dragana Lazarevic, Anand Prahalad Rao, Denise Pires Marafon, Nicolino Ruperto, Alberto Martini, Angelo Ravelli
OBJECTIVE: To develop and test a hybrid measure of muscle strength for juvenile dermatomyositis (JDM), which is based on the combination of the Manual Muscle Testing 8 (MMT8) and the Childhood Myositis Assessment Scale (CMAS), but is more comprehensive than the former and more feasible than the latter. METHODS: The hybrid MMT/CMAS (hMC) is composed of all 8 items of the MMT8 and 3 items of the CMAS: 1) time of head lift; 2) assessment of abdominal muscles; 3) floor rise...
December 15, 2017: Arthritis Care & Research
https://www.readbyqxmd.com/read/29243131/analysis-of-variability-of-urinary-excreted-jc-virus-strains-in-patients-infected-with-hiv-and-healthy-donors
#13
Danijela Karalic, Ivana Lazarevic, Ana Banko, Maja Cupic, Djordje Jevtovic, Tanja Jovanovic
In immunocompromised individuals, especially in patients with T cell immunodeficiency, reactivation of JCPyV can cause serious life-threatening diseases. Nowadays, HIV infection is one of the most important factor for reactivation of JCPyV and the development of of the progressive multifocal leukoencephalopathy (PML). Mutations in the outer loops of the VP1 region can lead to the selection of the viral variants with changed tropism and increased pathological potential. The aims of this study were to determine sequence variation and amino acid changes within VP1 loops and the structure of non-coding control region (NCCR) of urinary excreted JCPyV isolates among HIV-infected patients and healthy donors...
December 14, 2017: Journal of Neurovirology
https://www.readbyqxmd.com/read/29239010/silicon-containing-analogs-of-camptothecin-as-anticancer-agents
#14
REVIEW
Nataliya F Lazareva, Viktor P Baryshok, Igor M Lazarev
The plant pentacyclic alkaloid camptothecin and its structural analogs were extensively studied. These compounds are interesting due to the antitumor activity associated with their ability to inhibit topoisomerase I in tumor cells. During the last decades of the 20th century, a large number of the silicon-containing camptothecins (silatecans) were synthesized. 7-tert-Butyldimethylsilyl-10-hydroxy-camptothecin (DB-67 or AR-67) has enhanced lipophilicity and demonstrates a antitumor activity superior to its carbon analog...
December 14, 2017: Archiv der Pharmazie
https://www.readbyqxmd.com/read/29217468/availability-of-hepatitis-c-diagnostics-and-therapeutics-in-european-and-eurasia-countries
#15
Hakan Leblebicioglu, Joop E Arends, Resat Ozaras, Giampaolo Corti, Lurdes Santos, Christoph Boesecke, Andrew Ustianowski, Ann-Sofi Duberg, Simona Ruta, Nermin N Salkic, Petr Husa, Ivana Lazarevic, Juan A Pineda, Natalia Yurievna Pshenichnaya, Tengiz Tsertswadze, Mojca Matičič, Edmond Puca, Gulzhan Abuova, Judit Gervain, Ramin Bayramli, Salih Ahmeti, Mairi Koulentaki, Badreddine Kilani, Adriana Vince, Francesco Negro, Mustafa Sunbul, Dominique Salmon
BACKGROUND: Treatment with direct acting antiviral agents (DAAs) has provided sustained virological response rates in >95% of patients with chronic hepatitis C virus (HCV) infection. However treatment is costly and market access, reimbursement and governmental restrictions differ among countries. We aimed to analyze these differences among European and Eurasian countries. METHODS: A survey including 20-item questionnaire was sent to experts in viral hepatitis...
December 4, 2017: Antiviral Research
https://www.readbyqxmd.com/read/29204282/in%C3%A2-vivo-selection-of-a-multidrug-resistant-aeromonas-salmonicida-during-medicinal-leech-therapy
#16
E Ruppé, A Cherkaoui, N Wagner, G C La Scala, J-Y Beaulieu, M Girard, J Frey, V Lazarevic, J Schrenzel
We report the selection in a 15-year-old boy of a multidrug-resistant, extended-spectrum β-lactamase (ESBL)-producing Aeromonas salmonicida after medicinal leech therapy that required an antibiotic prophylaxis based on piperacillin/tazobactam and cotrimoxazole. Whole genome sequencing of the strain indeed revealed 13 antibiotic resistance genes, including the ESBL CTX-M-3 and the unusual β-lactamase SCO-1.
January 2018: New Microbes and New Infections
https://www.readbyqxmd.com/read/29191917/isolated-myelosarcoma-is-characterized-by-recurrent-nfe2-mutations-and-concurrent-preleukemic-clones-in-the-bone-marrow
#17
Vladimir Lazarevic, Christina Orsmark-Pietras, Henrik Lilljebjörn, Louise Pettersson, Marianne Rissler, Anna Lübking, Mats Ehinger, Gunnar Juliusson, Thoas Fioretos
No abstract text is available yet for this article.
November 30, 2017: Blood
https://www.readbyqxmd.com/read/29191059/optimization-of-biologic-therapy-in-crohn-s-disease
#18
Mohammed Razvi, Mark Lazarev
Crohn's disease (CD) is a manifestation of inflammatory bowel disease (IBD), which can result in significant morbidity. Biologic therapy with anti-TNF medication has been effective in treating inflammation and reducing complications in CD. It is important for clinicians to have better knowledge of the various biologic therapies including mechanisms of action and optimization strategies. Areas covered: The review describes optimization of biologic therapy in CD including different mechanisms of loss of response, therapeutic drug monitoring in CD, clinical implications and management strategies which utilize drug monitoring, and areas of future development and research in optimization of biologic therapy...
November 30, 2017: Expert Opinion on Biological Therapy
https://www.readbyqxmd.com/read/29186015/establishing-genotype-to-phenotype-relationships-in-bacteria-causing-hospital-acquired-pneumonia-a-prelude-to-the-application-of-clinical-metagenomics
#19
REVIEW
Etienne Ruppé, Abdessalam Cherkaoui, Vladimir Lazarevic, Stéphane Emonet, Jacques Schrenzel
Clinical metagenomics (CMg), referred to as the application of next-generation sequencing (NGS) to clinical samples, is a promising tool for the diagnosis of hospital-acquired pneumonia (HAP). Indeed, CMg allows identifying pathogens and antibiotic resistance genes (ARGs), thereby providing the information required for the optimization of the antibiotic regimen. Hence, provided that CMg would be faster than conventional culture, the probabilistic regimen used in HAP could be tailored faster, which should lead to an expected decrease of mortality and morbidity...
November 29, 2017: Antibiotics
https://www.readbyqxmd.com/read/29171683/ptychographic-x-ray-imaging-of-colloidal-crystals
#20
Sergey Lazarev, Ilya Besedin, Alexey V Zozulya, Janne-Mieke Meijer, Dmitry Dzhigaev, Oleg Yu Gorobtsov, Ruslan P Kurta, Max Rose, Anatoly G Shabalin, Elena A Sulyanova, IvanA Zaluzhnyy, Alexey P Menushenkov, Michael Sprung, Andrei V Petukhov, Ivan A Vartanyants
Ptychographic coherent X-ray imaging is applied to obtain a projection of the electron density of colloidal crystals, which are promising nanoscale materials for optoelectronic applications and important model systems. Using the incident X-ray wavefield reconstructed by mixed states approach, a high resolution and high contrast image of the colloidal crystal structure is obtained by ptychography. The reconstructed colloidal crystal reveals domain structure with an average domain size of about 2 µm. Comparison of the domains formed by the basic close-packed structures, allows us to conclude on the absence of pure hexagonal close-packed domains and confirms the presence of random hexagonal close-packed layers with predominantly face-centered cubic structure within the analyzed part of the colloidal crystal film...
November 24, 2017: Small
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