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https://www.readbyqxmd.com/read/29670510/differential-expression-of-several-mirnas-and-the-host-genes-aatk-and-dnm2-in-leukocytes-of-sporadic-als-patients
#1
Katarina Vrabec, Emanuela Boštjančič, Blaž Koritnik, Lea Leonardis, Leja Dolenc Grošelj, Janez Zidar, Boris Rogelj, Damjan Glavač, Metka Ravnik-Glavač
Genetic studies have managed to explain many cases of familial amyotrophic lateral sclerosis (ALS) through mutations in several genes. However, the cause of a majority of sporadic cases remains unknown. Recently, epigenetics, especially miRNA studies, show some promising aspects. We aimed to evaluate the differential expression of 10 miRNAs, including miR-9, miR-338, miR-638, miR-663a, miR-124a, miR-143, miR-451a, miR-132, miR-206, and let-7b, for which some connection to ALS was shown previously in ALS culture cells, animal models or patients, and in three miRNA host genes, including C1orf61 (miR-9), AATK (miR-338), and DNM2 (miR-638), in leukocyte samples of 84 patients with sporadic ALS...
2018: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/29668933/the-human-clone-st22-sccmec-iv-methicillin-resistant-staphylococcus-aureus-isolated-from-swine-herds-and-wild-primates-in-nepal-is-man-the-common-source
#2
Marilyn C Roberts, Prabhu Raj Joshi, Alexander L Greninger, Daira Melendez, Saroj Paudel, Mahesh Acharya, Nabin Kishor Bimali, Narayan P Koju, David No, Mukesh Chalise, Randall C Kyes
Swine nasal samples [n = 282] were collected from 12 randomly selected farms around Kathmandu, Nepal, from healthy animals. In addition, wild monkey (Macaca mulatta) saliva samples [n = 59] were collected near temples areas in Kathmandu using a non-invasive sampling technique. All samples were processed for MRSA using standardized selective media and conventional biochemical tests. MRSA verification was done and isolates characterized by SCCmec, multilocus sequence typing, whole genome sequencing [WGS] and antibiotic susceptibilities...
May 1, 2018: FEMS Microbiology Ecology
https://www.readbyqxmd.com/read/29652621/dose-modifying-factor-of-radiation-therapy-with-concurrent-cisplatin-treatment-in-hpv-positive-squamous-cell-carcinoma-a-preclinical-study
#3
Ajda Prevc, Simona Kranjc, Maja Cemazar, Vesna Todorovic, Bojana Zegura, Matjaz Novak, Metka Filipic, Margareta Strojan Flezar, Irena Srebotnik Kirbis, Ana Rotter, Andreja Brozic, Martina Niksic Zakelj, Mario Poljak, Lea Hosnjak, Blaz Groselj, Primoz Strojan, Gregor Sersa
Human papillomavirus (HPV) is an important etiological factor in oropharyngeal squamous cell carcinoma (SCC). Compared to HPV-negative tumors, HPV-positive oropharyngeal SCC has shown a better response to nonsurgical treatments. In this study, we determined the dose-modifying factors for HPV-positive tumors with single-dose irradiation, with or without low radiosensitizing doses of cisplatin. In vitro, we determined an increased radiosensitivity of HPV-positive SCC, which might be a consequence of HPV-induced changes in the cell cycle regulation and DNA damage response, leading to increased cell death...
April 13, 2018: Radiation Research
https://www.readbyqxmd.com/read/29618798/differential-expression-of-micrornas-and-other-small-rnas-in-muscle-tissue-of-patients-with-als-and-healthy-age-matched-controls
#4
Anja Kovanda, Lea Leonardis, Janez Zidar, Blaž Koritnik, Leja Dolenc-Groselj, Stanislava Ristic Kovacic, Tomaž Curk, Boris Rogelj
Amyotrophic lateral sclerosis is a late-onset disorder primarily affecting motor neurons and leading to progressive and lethal skeletal muscle atrophy. Small RNAs, including microRNAs (miRNAs), can serve as important regulators of gene expression and can act both globally and in a tissue-/cell-type-specific manner. In muscle, miRNAs called myomiRs govern important processes and are deregulated in various disorders. Several myomiRs have shown promise for therapeutic use in cellular and animal models of ALS; however, the exact miRNA species differentially expressed in muscle tissue of ALS patients remain unknown...
April 4, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29593560/intestinal-metagenomes-and-metabolomes-in-healthy-young-males-inactivity-and-hypoxia-generated-negative-physiological-symptoms-precede-microbial-dysbiosis
#5
Robert Šket, Tadej Debevec, Susanne Kublik, Michael Schloter, Anne Schoeller, Boštjan Murovec, Katarina Vogel Mikuš, Damjan Makuc, Klemen Pečnik, Janez Plavec, Igor B Mekjavić, Ola Eiken, Zala Prevoršek, Blaž Stres
We explored the metagenomic, metabolomic and trace metal makeup of intestinal microbiota and environment in healthy male participants during the run-in (5 day) and the following three 21-day interventions: normoxic bedrest (NBR), hypoxic bedrest (HBR) and hypoxic ambulation (HAmb) which were carried out within a controlled laboratory environment (circadian rhythm, fluid and dietary intakes, microbial bioburden, oxygen level, exercise). The fraction of inspired O2 (Fi O2 ) and partial pressure of inspired O2 (Pi O2 ) were 0...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29587369/an-scf-fbxo28-e3-ligase-protects-pancreatic-%C3%AE-cells-from-apoptosis
#6
Kanaka Durga Devi Gorrepati, Wei He, Blaz Lupse, Ting Yuan, Kathrin Maedler, Amin Ardestani
Loss of pancreatic β-cell function and/or mass is a central hallmark of all forms of diabetes but its molecular basis is incompletely understood. β-cell apoptosis contributes to the reduced β-cell mass in diabetes. Therefore, the identification of important signaling molecules that promote β-cell survival in diabetes could lead to a promising therapeutic intervention to block β-cell decline during development and progression of diabetes. In the present study, we identified F-box protein 28 (FBXO28), a substrate-recruiting component of the Skp1-Cul1-F-box (SCF) ligase complex, as a regulator of pancreatic β-cell survival...
March 24, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29524153/small-mammals-as-sentinels-of-antimicrobial-resistant-staphylococci
#7
Vladimír Kmeť, Anna Čuvalová, Michal Stanko
A total of 39 coagulase-negative staphylococci and seven Staphylococcus aureus strains were isolated from small mammal feces, i.e., the striped field mouse (Apodemus agrarius) and the yellow-necked mouse (A. flavicollis) in two sampling areas, deciduous forest and karst plains. MALDI-TOF analysis revealed five species of coagulase-negative staphylococci: S. sciuri, S. hominis, S. warneri, S. haemolyticus, and S. xylosus. All strains were susceptible to tetracycline, linezolid, vancomycin, and teicoplanin. Three MRSA strains with the mecA gene were detected...
March 9, 2018: Folia Microbiologica
https://www.readbyqxmd.com/read/29522957/protein-a-affinity-chromatography-of-chinese-hamster-ovary-cho-cell-culture-broths-containing-biopharmaceutical-monoclonal-antibody-mab-experiments-and-mechanistic-transport-binding-and-equilibrium-modeling
#8
Matic Grom, Mirijam Kozorog, Simon Caserman, Andrej Pohar, Blaž Likozar
Protein A-based affinity chromatography is a highly-efficient separation method to capture, purify and isolate biosimilar monoclonal antibodies (mAb) - an important medical product of biopharmaceutical industrial manufacturing. It is considered the most expensive step in purification downstream operations; therefore, its performance optimization offers a great cost saving in the overall production expenditure. The biochemical mixture-separating specific interaction experiments with Chinese hamster ovary (CHO) cell culture harvest, containing glycosylated extracellular immunoglobulins (Ig), were made using five different state-of-the-art commercial resins...
March 1, 2018: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/29503642/prevalence-and-genetic-basis-of-antimicrobial-resistance-in-non-aureus-staphylococci-isolated-from-canadian-dairy-herds
#9
Diego B Nobrega, Sohail Naushad, S Ali Naqvi, Larissa A Z Condas, Vineet Saini, John P Kastelic, Christopher Luby, Jeroen De Buck, Herman W Barkema
Emergence and spread of antimicrobial resistance is a major concern for the dairy industry worldwide. Objectives were to determine: (1) phenotypic and genotypic prevalence of drug-specific resistance for 25 species of non-aureus staphylococci, and (2) associations between presence of resistance determinants and antimicrobial resistance. Broth micro-dilution was used to determine resistance profiles for 1,702 isolates from 89 dairy herds. Additionally, 405 isolates were sequenced to screen for resistance determinants...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29481838/mtorc2-signaling-a-path-for-pancreatic-%C3%AE-cell-s-growth-and-function
#10
REVIEW
Ting Yuan, Blaz Lupse, Kathrin Maedler, Amin Ardestani
The mechanistic target of rapamycin (mTOR) signaling pathway is an evolutionary conserved pathway that senses signals from nutrients and growth factors to regulate cell growth, metabolism and survival. mTOR acts in two biochemically and functionally distinct complexes, mTOR complex 1 (mTORC1) and 2 (mTORC2), which differ in terms of regulatory mechanisms, substrate specificity and functional outputs. While mTORC1 signaling has been extensively studied in islet/ β-cell biology, recent findings demonstrate a distinct role for mTORC2 in the regulation of pancreatic β-cell function and mass...
February 23, 2018: Journal of Molecular Biology
https://www.readbyqxmd.com/read/29477353/full-scale-agricultural-biogas-plant-metal-content-and-process-parameters-in-relation-to-bacterial-and-archaeal-microbial-communities-over-2-5-year-span
#11
Sabina Kolbl Repinc, Robert Šket, Domen Zavec, Katarina Vogel Mikuš, Fernando G Fermoso, Blaž Stres
A start-up of 4 MW agricultural biogas plant in Vučja vas, Slovenia, was monitored from 2011 to 2014. The start-up was carried out in 3 weeks with the intake of biomass from three operating full-scale 1-2 MW donor agricultural biogas plants. The samples were taken from donor digesters and from two serial digesters during the start-up over the course of 2.5 years. Bacterial and Archaeal microbial communities progressively diverged from the composition of donor digesters during the start-up phase. The rate of change of Bacterial community decreased exponentially over the first 2...
February 21, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29426925/ageing-potentiates-diet-induced-glucose-intolerance-%C3%AE-cell-failure-and-tissue-inflammation-through-tlr4
#12
Wei He, Ting Yuan, Dolma Choezom, Hannah Hunkler, Karthika Annamalai, Blaz Lupse, Kathrin Maedler
Ageing and obesity are two major risk factors for the development of type 2 diabetes (T2D). A chronic, low-grade, sterile inflammation contributes to insulin resistance and β-cell failure. Toll-like receptor-4 (TLR4) is a major pro-inflammatory pathway; its ligands as well as downstream signals are increased systemically in patients with T2D and at-risk individuals. In the present study we investigated the combined effects of high fat/high sucrose diet (HFD) feeding, ageing and TLR4-deficiency on tissue inflammation, insulin resistance and β-cell failure...
February 9, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29418080/insights-from-ion-binding-site-network-analysis-into-evolution-and-functions-of-proteins
#13
Blaž Škrlj, Tanja Kunej, Janez Konc
Many biological phenomena can be represented as complex networks. Using a protein binding site comparison approach, we generated a network of ion binding sites on the scale of all known protein structures from the Protein Data Bank. We found that this ion binding site similarity network is scale-free, indicating a network in which a few ion binding site scaffolds are the network hubs, and these are connected to hundreds of nodes, whereas the vast majority of nodes have only a few neighbors. Enrichment and statistical analysis of the network components and communities yielded insights into underlying processes from the functional and the structural perspective...
February 8, 2018: Molecular Informatics
https://www.readbyqxmd.com/read/29402556/electrochemotherapy-as-treatment-option-for-hepatocellular-carcinoma-a-prospective-pilot-study
#14
Mihajlo Djokic, Maja Cemazar, Peter Popovic, Bor Kos, Rok Dezman, Masa Bosnjak, Martina Niksic Zakelj, Damijan Miklavcic, Stojan Potrc, Borut Stabuc, Ales Tomazic, Gregor Sersa, Blaz Trotovsek
BACKGROUND AND OBJECTIVES: Electrochemotherapy provides non-thermal ablation of cutaneous as well as deep seated tumors. Based on positive results of the treatment of colorectal liver metastases, we conducted a prospective pilot study on hepatocellular carcinomas with the aim of testing the feasibility, safety and effectiveness of electrochemotherapy. PATIENTS AND METHODS: Electrochemotherapy with bleomycin was performed on 17 hepatocellular carcinomas in 10 patients using a previously established protocol...
February 2, 2018: European Journal of Surgical Oncology
https://www.readbyqxmd.com/read/29373088/molecular-characterization-and-clonal-diversity-of-methicillin-resistant-and-susceptible-staphylococcus-aureus-isolates-of-milk-of-cows-with-clinical-mastitis-in-tunisia
#15
Amira Klibi, Ahlem Jouini, Paula Gómez, Khouloud Slimene, Sara Ceballos, Carmen Torres, Abderrazek Maaroufi
The aim of this study was to determine the genetic lineages, and the frequency of antibiotic resistance and virulence determinants in methicillin-resistant Staphylococcus aureus (MRSA) and methicillin-susceptible S. aureus (MSSA) isolates recovered from milk of cows with clinical mastitis. Three hundred milk samples from bovine with clinical mastitis were obtained from 30 dairy farms in different regions of Tunisia. Fifteen of the 300 tested samples contained S. aureus (5%), in three cases were MRSA. Isolates (one/sample) were typed (S...
January 26, 2018: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/29355699/safety-hazards-in-bacteriocinogenic-staphylococcus-strains-isolated-from-goat-and-sheep-milk
#16
Samane Rahmdel, Saeid Hosseinzadeh, Seyed Shahram Shekarforoush, Sandra Torriani, Veronica Gatto, Safoora Pashangeh
In this study, 28 bacteriocinogenic Staphylococcus strains isolated from goat and sheep milk were subjected to the PCR detection of enterotoxin genes (sea-see), enterotoxin-like toxin Q gene (selq), toxic shock syndrome toxin gene (tst1), and antibiotic resistance genes. They were also evaluated for phenotypic resistance against 10 antibiotics and hemolytic activity. The tyramine and histamine production was investigated using the agar plate assay and capillary zone electrophoretic analysis (CZE). Twenty-five isolates harbored at least one enterotoxin gene...
March 2018: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29350135/plasmid-encoded-transferable-mecb-mediated-methicillin-resistance-in-staphylococcus-aureus
#17
Karsten Becker, Sarah van Alen, Evgeny A Idelevich, Nina Schleimer, Jochen Seggewiß, Alexander Mellmann, Ursula Kaspar, Georg Peters
During cefoxitin-based nasal screening, phenotypically categorized methicillin-resistant Staphylococcus aureus (MRSA) was isolated and tested negative for the presence of the mecA and mecC genes as well as for the SCCmec-orfX junction region. The isolate was found to carry a mecB gene previously described for Macrococcus caseolyticus but not for staphylococcal species. The gene is flanked by β-lactam regulatory genes similar to mecR, mecI, and blaZ and is part of an 84.6-kb multidrug-resistance plasmid that harbors genes encoding additional resistances to aminoglycosides (aacA-aphD, aphA, and aadK) as well as macrolides (ermB) and tetracyclines (tetS)...
February 2018: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/29337343/antimicrobial-resistance-genetic-markers-in-potentially-pathogenic-gram-positive-cocci-isolated-from-brazilian-soft-cheese
#18
Juliana Alves Resende, Cláudia Oliveira Fontes, Alessandra Barbosa Ferreira-Machado, Thiago César Nascimento, Vânia Lúcia Silva, Cláudio Galuppo Diniz
Although most Brazilian dairy products meet high technological standards, there are quality issues regarding milk production, which may reduce the final product quality. Several microbial species may contaminate milk during manufacture and handling. If antimicrobial usage remains uncontrolled in dairy cattle, the horizontal transfer of antimicrobial resistance genes in foodstuffs may be of particular concern for both food producers and dairy industry. This study focused on the evaluation of putative Gram positive cocci in Minas cheese and of antimicrobial and biocide resistance genes among the isolated bacteria...
February 2018: Journal of Food Science
https://www.readbyqxmd.com/read/29326223/genome-sequence-of-a-lethal-strain-of-xylem-invading-verticillium-nonalfalfae
#19
Jernej Jakše, Vid Jelen, Sebastjan Radišek, Ronnie de Jonge, Stanislav Mandelc, Aljaž Majer, Tomaž Curk, Blaž Zupan, Bart P H J Thomma, Branka Javornik
Verticillium nonalfalfae , a soilborne vascular phytopathogenic fungus, causes wilt disease in several crop species. Of great concern are outbreaks of highly aggressive V. nonalfalfae strains, which cause a devastating wilt disease in European hops. We report here the genome sequence and annotation of V. nonalfalfae strain T2, providing genomic information that will allow better understanding of the molecular mechanisms underlying the development of highly aggressive strains.
January 11, 2018: Genome Announcements
https://www.readbyqxmd.com/read/29275961/mtorc1-signaling-a-double-edged-sword-in-diabetic-%C3%AE-cells
#20
REVIEW
Amin Ardestani, Blaz Lupse, Yoshiaki Kido, Gil Leibowitz, Kathrin Maedler
The mechanistic target of rapamycin complex 1 (mTORC1) is a central regulator of metabolic and nutrient cues that integrates environmental inputs into downstream signaling pathways to control cellular metabolism, growth, and survival. While numerous in vitro and in vivo studies reported the positive functions of mTORC1 in the regulation of β cell survival and proliferation under physiological conditions, more recent work demonstrates the opposite in the long term; this is exemplified by the constitutive inappropriate hyper-activation of mTORC1 in diabetic islets or β cells under conditions of increased β cell stress and metabolic demands...
February 6, 2018: Cell Metabolism
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