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https://www.readbyqxmd.com/read/29239010/silicon-containing-analogs-of-camptothecin-as-anticancer-agents
#1
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
#2
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
#3
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
#4
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
#5
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
#6
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
#7
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
https://www.readbyqxmd.com/read/29138554/characteristics-of-copd-patients-according-to-gold-classification-and-clinical-phenotypes-in-the-russian-federation-the-support-trial
#8
Vladimir Arkhipov, Daria Arkhipova, Marc Miravitlles, Andrey Lazarev, Ekaterina Stukalina
Background: The high prevalence of COPD in the Russian Federation has been demonstrated in several epidemiological studies. However, there are still no data on the clinical characteristics of these patients according to Global Initiative for Chronic Obstructive Lung Disease (GOLD) groups and phenotypes, which could provide additional understanding of the burden of COPD, routine clinical practice, and ways to improve the treatment of patients with COPD in Russia. Patients and methods: SUPPORT was an observational multicenter study designed to obtain data about the distribution of patients with previously diagnosed COPD according to the severity of bronchial obstruction, symptom severity, risk of exacerbation, COPD phenotypes, and treatment of COPD...
2017: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/29120545/-intestinal-microbiota-towards-therapeutic-applications
#9
Jacques Schrenzel, Vladimir Lazarevic
Due to technological advances in DNA sequencing, the number of microbiota studies has increased exponentially in recent years. The intestinal microbiota, characterized by high diversity and bacterial richness, received particular interest. The studies showed that the modifications of the intestinal microbiota derive from and lead to different mechanisms and explain various pathologies, including those outside the digestive system.The aim of this short article is to comment on some recent findings on the human microbiota in a clinical context...
November 8, 2017: Revue Médicale Suisse
https://www.readbyqxmd.com/read/29109403/identification-of-unusual-peptides-with-new-cys-frameworks-in-the-venom-of-the-cold-water-sea-anemone-cnidopus-japonicus
#10
Vladislav V Babenko, Alexander N Mikov, Valentin A Manuvera, Nickolay A Anikanov, Sergey I Kovalchuk, Yaroslav A Andreev, Yulia A Logashina, Daniil A Kornilov, Alexander I Manolov, Nadya P Sanamyan, Karen E Sanamyan, Elena S Kostryukova, Sergey A Kozlov, Eugene V Grishin, Vadim M Govorun, Vassili N Lazarev
Sea anemones (Actiniaria) are intensely popular objects of study in venomics. Order Actiniaria includes more than 1,000 species, thus presenting almost unlimited opportunities for the discovery of novel biologically active molecules. The venoms of cold-water sea anemones are studied far less than the venoms of tropical sea anemones. In this work, we analysed the molecular venom composition of the cold-water sea anemone Cnidopus japonicus. Two sets of NGS data from two species revealed molecules belonging to a variety of structural classes, including neurotoxins, toxin-like molecules, linear polypeptides (Cys-free), enzymes, and cytolytics...
November 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29072536/hepatitis-b-outbreak-among-men-who-have-sex-with-men-in-the-autonomous-province-of-vojvodina-serbia
#11
Predrag Duric, Smiljana Rajcevic, Svetlana Ilic, Vesna Milosevic, Katharina Hintringer, Milotka Fabri, Maja Ruzic, Vladimir Petrovic, Mladen Petrovic, Gorana Dragovac, Biljana Radosavljevic, Ivana Lazarevic, Maja Stanojevic, Martin Rusnak
No abstract text is available yet for this article.
October 26, 2017: LGBT Health
https://www.readbyqxmd.com/read/28971504/relatively-favorable-outcome-after-allogeneic-stem-cell-transplantation-for-bcr-abl1-positive-aml-a-survey-from-the-acute-leukemia-working-party-of-the-european-society-for-blood-and-marrow-transplantation-ebmt
#12
Vladimir Lj Lazarevic, Myriam Labopin, Wu Depei, Ibrahim Yakoub-Agha, Anne Huynh, Per Ljungman, Nicolaas Schaap, Jan J Cornelissen, Natacha Maillard, Pietro Pioltelli, Tobias Gedde-Dahl, Stig Lenhoff, Mohamed Houhou, Jordi Esteve, Mohamad Mohty, Arnon Nagler
The aim of the study was to assess the role of allogeneic stem cell transplantation (SCT) in patients diagnosed with BCR-ABL1-positive acute myeloid leukemia (AML). Fifty-seven patients (median age, 48 years, range: 19-67) with BCR-ABL1 positive AML undergoing SCT were identified. The majority of the patients (70%) received a TKI before the transplant. At SCT 48 patients were in CR (45 in CR1), while 9 patients were transplanted in a more advanced stage of the disease. MRD was negative (BCR-ABL1/ABL < 10(4) ) at time of SCT in 36...
October 3, 2017: American Journal of Hematology
https://www.readbyqxmd.com/read/28952164/linear-decline-of-corrected-platelet-count-increment-within-24%C3%A2-hours-after-platelet-transfusion-in-haematological-patients-a-prospective-observational-study
#13
Sigurdur Benediktsson, Vladimir Lazarevic, Lars Nilsson, Jens Kjeldsen-Kragh, Ulf Schött, Thomas Kander
OBJECTIVES: The aim of this study was to prospectively explore the detailed longitudinal development of platelet increments in patients with chemotherapy-induced bone marrow aplasia during the first 24 hours after platelet transfusion. METHODS: Patients admitted to the Haematology department during 7 months, and fulfilled inclusion criteria were divided into 4 groups: Group 1, patients with acute leukaemia; Group 2, patients after autologous stem cell transplantation (SCT); Group 3, patients after allogeneic SCT; and Group 4, patients given platelet transfusion prior to intervention...
September 26, 2017: European Journal of Haematology
https://www.readbyqxmd.com/read/28941464/glutamic-acid-as-enhancer-of-protein-synthesis-kinetics-in-hepatocytes-from-old-rats
#14
V Y Brodsky, L A Malchenko, N N Butorina, D S Lazarev Konchenko, N D Zvezdina, T K Dubovaya
Dense cultures of hepatocytes from old rats (~2 years old, body weight 530-610 g) are different from similar cultures of hepatocytes from young rats by the low amplitude of protein synthesis rhythm. Addition of glutamic acid (0.2, 0.4, or 0.6 mg/ml) into the culture medium with hepatocytes of old rats resulted in increase in the oscillation amplitudes of the protein synthesis rhythm to the level of young rats. A similar action of glutamic acid on the protein synthesis kinetics was observed in vivo after feeding old rats with glutamic acid...
August 2017: Biochemistry. Biokhimii︠a︡
https://www.readbyqxmd.com/read/28930150/detection-of-bacterial-pathogens-from-broncho-alveolar-lavage-by-next-generation-sequencing
#15
Stefano Leo, Nadia Gaïa, Etienne Ruppé, Stephane Emonet, Myriam Girard, Vladimir Lazarevic, Jacques Schrenzel
The applications of whole-metagenome shotgun sequencing (WMGS) in routine clinical analysis are still limited. A combination of a DNA extraction procedure, sequencing, and bioinformatics tools is essential for the removal of human DNA and for improving bacterial species identification in a timely manner. We tackled these issues with a broncho-alveolar lavage (BAL) sample from an immunocompromised patient who had developed severe chronic pneumonia. We extracted DNA from the BAL sample with protocols based either on sequential lysis of human and bacterial cells or on the mechanical disruption of all cells...
September 20, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28911091/a-phase-iii-trial-comparing-oral-s-1-cisplatin-and-intravenous-5-fluorouracil-cisplatin-in-patients-with-untreated-diffuse-gastric-cancer
#16
J A Ajani, M Abramov, I Bondarenko, Y Shparyk, V Gorbunova, A Hontsa, N Otchenash, M Alsina, S Lazarev, J Feliu, A Elme, V Esko, K Abdalla, U Verma, F Benedetti, T Aoyama, H Mizuguchi, L Makris, G Rosati
Background: The effect of histology-based treatment regimen on diffuse gastric adenocarcinoma has not been evaluated in clinical trials. This international phase III trial evaluated the efficacy and safety of S-1 (a contemporary oral fluoropyrimidine)/cisplatin versus 5-fluorouracil (5-FU)/cisplatin in chemotherapy-naïve patients with diffuse-type adenocarcinoma involving the gastroesophageal junction or stomach. Patients and methods: Eligibility criteria included untreated, measurable, advanced diffuse adenocarcinoma confirmed by central pathology and performance status of 0-1...
September 1, 2017: Annals of Oncology: Official Journal of the European Society for Medical Oncology
https://www.readbyqxmd.com/read/28877841/cognitive-behaviour-therapy-for-health-anxiety-in-medical-patients-champ-a-randomised-controlled-trial-with-outcomes-to-5-years
#17
Peter Tyrer, Paul Salkovskis, Helen Tyrer, Duolao Wang, Michael J Crawford, Simon Dupont, Sylvia Cooper, John Green, David Murphy, Georgina Smith, Sharandeep Bhogal, Shaeda Nourmand, Valentina Lazarevic, Gemma Loebenberg, Rachel Evered, Stephanie Kings, Antoinette McNulty, Yvonne Lisseman-Stones, Sharon McAllister, Kofi Kramo, Jessica Nagar, Steven Reid, Rahil Sanatinia, Katherine Whittamore, Gemma Walker, Aaron Philip, Hilary Warwick, Sarah Byford, Barbara Barrett
BACKGROUND: Health anxiety is an under-recognised but frequent cause of distress that is potentially treatable, but there are few studies in secondary care. OBJECTIVE: To determine the clinical effectiveness and cost-effectiveness of a modified form of cognitive-behaviour therapy (CBT) for health anxiety (CBT-HA) compared with standard care in medical outpatients. DESIGN: Randomised controlled trial. SETTING: Five general hospitals in London, Middlesex and Nottinghamshire...
September 2017: Health Technology Assessment: HTA
https://www.readbyqxmd.com/read/28862297/synthesis-antimicrobial-activity-and-in-silico-studies-on-thymol-esters
#18
Jelena Lazarević, Ana Kolarević, Aleksandra Đorđević, Gordana Stojanović, Andrija Šmelcerović, Pierangela Ciuffreda, Enzo Santaniello
Derivatisation of parent structure in terpenoids often results in enhancement of biological activity of newly obtained compounds. Thymol, a naturally occurring phenol biosynthesized through the terpene pathway, is a well known biocide with strong antimicrobial attributes and diverse therapeutic activities. We have aimed our study on a single modification of phenolic functionality in thymol in order to obtain a small focused library of twenty thymyl esters, ten of which were new compounds. All compounds were involved in in vitro antimicrobial testing...
September 2017: Acta Chimica Slovenica
https://www.readbyqxmd.com/read/28846586/performance-testing-of-selected-types-of-electronic-personal-dosimeters-in-x-and-gamma-radiation-fields
#19
Nikola Kržanović, Miloš Živanović, Olivera Ciraj-Bjelac, Đorđe Lazarević, Sandra Ćeklić, Srboljub Stanković
Electronic personal dosimeters (EPDs) are increasingly being used alongside conventional thermoluminescent dosimeters to measure the dose of legal record in terms of personal dose equivalent. Therefore, it is of great importance to execute performance tests of these dosimeters in photon fields of various energies and at various angles of incidence. This testing is done in order to simulate the behavior of these dosimeters in realistic multidirectional polyenergetic ionizing radiation fields. Tests of accuracy, linearity, energy response, and angular response have been performed on 10 EPDs from multiple manufacturers...
October 2017: Health Physics
https://www.readbyqxmd.com/read/28807496/cd4-effector-t-cell-differentiation-is-controlled-by-il-15-that-is-expressed-and-presented-in-trans
#20
Adam T Waickman, Davinna L Ligons, SuJin Hwang, Joo-Young Park, Vanja Lazarevic, Noriko Sato, Changwan Hong, Jung-Hyun Park
T cells are both producers and consumers of cytokines, and autocrine cytokine signaling plays a critical role in T cell immunity. IL-15 is a homeostatic cytokine for T cells that also controls inflammatory immune responses. An autocrine role of T cell-derived IL-15, however, remains unclear. Here we examined IL-15 expression and signaling upon effector T cell differentiation in mice, and, surprisingly, found that CD4 T cells did not express IL-15. CD4 T cells lacked Il15 gene reporter activity, did not contain IL-15 transcripts, and did not produce IL-15Rα, the proprietary IL-15 receptor required for IL-15 trans-presentation...
November 2017: Cytokine
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