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https://www.readbyqxmd.com/read/29614691/novel-speg-mutations-in-congenital-myopathy-without-centralized-nuclei
#1
Xavière Lornage, Pascal Sabouraud, Béatrice Lannes, Dominique Gaillard, Raphaël Schneider, Jean-François Deleuze, Anne Boland, Julie Thompson, Johann Böhm, Valérie Biancalana, Jocelyn Laporte
Congenital myopathies are clinically and genetically heterogeneous, and are classified based on typical structural abnormalities on muscle sections. Recessive mutations in the striated muscle preferentially expressed protein kinase (SPEG) were recently reported in patients with centronuclear myopathy (CNM) associated in most cases with dilated cardiomyopathy. Here we report the identification of novel biallelic truncating SPEG mutations in a patient with moderate congenital myopathy without clinical and histological hallmarks of CNM and without cardiomyopathy...
March 26, 2018: Journal of Neuromuscular Diseases
https://www.readbyqxmd.com/read/29596368/uhplc-ms-metabolome-fingerprinting-the-isolation-of-main-compounds-and-antioxidant-activity-of-the-andean-species-tetraglochin-ameghinoi-speg-speg
#2
Lorena Luna, Mario J Simirgiotis, Beatriz Lima, Jorge Bórquez, Gabriela E Feresin, Alejandro Tapia
The seriated extracts of petroleum ether (PE-E), dichloromethane (DCM-E) and methanol extracts (MeOH-E) from the aerial parts of the native South American plant Tetraglochin ameghinoi (Rosaceae), were evaluated regarding their antioxidant and antibacterial activities. The antioxidant properties were evaluated by free radical scavenging methods (DPPH and TEAC), ferric-reducing antioxidant power (FRAP) and lipoperoxidation in erythrocytes (LP), while the antibacterial activity was performed against Gram-positive and Gram-negative bacteria according to the Clinical and Laboratory Standards Institute (CLSI) guidelines...
March 29, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29542040/two-new-indolyl-diketopiperazines-trypostatins-c-and-d-from-aspergillus-penicilliodes-speg
#3
Han Zhang, Hong-Tao Zhu, Dong Wang, Chong-Ren Yang, Ying-Jun Zhang
Twelve indolyl diketopiperazines 1-12 were isolated from the mycelia culture of Aspergillus penicilliodes Speg., a dominant microorganism from the post fermentation process of ripe Pu-er tea. Their structures were elucidated by extensive spectroscopic methods. Among them, trypostatins C (1) and D (2) featuring with a rare methyl vinyl ketone side chain at C-2 are new compounds, while 3 and 4 were obtained for the first time from nature source. The isolates 3-12 did not show obvious cytotoxicities against five human cancer cell lines at a concentration of 40 μM...
March 14, 2018: Natural Products and Bioprospecting
https://www.readbyqxmd.com/read/29532420/detection-of-streptococcus-pyogenes-virulence-genes-in-streptococcus-dysgalactiae-subsp-equisimilis-from-vellore-india
#4
Anshu Babbar, Andreas Itzek, Dietmar H Pieper, D Patric Nitsche-Schmitz
Streptococcus dysgalactiae subsp. equisimilis (SDSE), belonging to the group C and G streptococci, are human pathogens reported to cause clinical manifestations similar to infections caused by Streptococcus pyogenes. To scrutinize the distribution of gene coding for S. pyogenes virulence factors in SDSE, 255 isolates were collected from humans infected with SDSE in Vellore, a region in southern India, with high incidence of SDSE infections. Initial evaluation indicated SDSE isolates comprising of 82.35% group G and 17...
March 12, 2018: Folia Microbiologica
https://www.readbyqxmd.com/read/29474540/speg-deficient-skeletal-muscles-exhibit-abnormal-triad-and-defective-calcium-handling
#5
Virginia Huntoon, Jeffrey J Widrick, Colline Sanchez, Samantha M Rosen, Candice Kutchukian, Siqi Cao, Christopher R Pierson, Xiaoli Liu, Mark A Perrella, Alan H Beggs, Vincent Jacquemond, Pankaj B Agrawal
Centronuclear myopathies (CNM) are a subtype of congenital myopathies (CM) characterized by skeletal muscle weakness and an increase in the number of central myonuclei. We have previously identified three CNM probands, two with associated dilated cardiomyopathy, carrying striated preferentially expressed gene (SPEG) mutations. Currently, the role of SPEG in skeletal muscle function is unclear as constitutive SPEG-deficient mice developed severe dilated cardiomyopathy and died in-utero. We have generated a conditional Speg-KO mouse model and excised Speg by crosses with striated muscle-specific cre-expressing mice (MCK-Cre)...
February 20, 2018: Human Molecular Genetics
https://www.readbyqxmd.com/read/29281656/bark-anatomy-chemical-composition-and-ethanol-water-extract-composition-of-anadenanthera-peregrina-and-anadenanthera-colubrina
#6
Graciene S Mota, Caroline J Sartori, Isabel Miranda, Teresa Quilhó, Fábio Akira Mori, Helena Pereira
The bark of Anadenanthera peregrina (L.) Speg and Anadenanthera colubrina (Vell.) Brenan were characterized in relation to anatomical and chemical features. The barks were similar and included a thin conducting phloem, a largely dilated and sclerified non-conducting phloem, and a rhyridome with periderms with thin phellem interspersed by cortical tissues. Only small differences between species were observed that cannot be used alone for taxonomic purposes. The summative chemical composition of A. peregrina and A...
2017: PloS One
https://www.readbyqxmd.com/read/29200720/extraction-of-chelerythrine-and-its-effects-on-pathogenic-fungus-spore-germination
#7
Qinghui Wei, Min Zhao, Xiaoyan Li
Background: Chemical fungicides are widely used to control crop diseases, but these chemicals have adverse effects. They destroy the ecological environment and even have toxic effects on human beings. In this context, the development of botanical pesticides is relevant. One potential botanical pesticide is chelerythrine, a main alkaloid of Chelidonium majus L., which has high antitumor, fungistasis, and antiphlogosis bioactivity. Objective: This study was designed to present an ultrasonic extraction method for chelerythrine and spore germination experiments to inhibit pathogenic fungi...
October 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/29187844/-speg-is-required-for-intracellular-replication-of-salmonella-in-various-human-cells-and-affects-its-polyamine-metabolism-and-global-transcriptomes
#8
Shiuh-Bin Fang, Ching-Jou Huang, Chih-Hung Huang, Ke-Chuan Wang, Nai-Wen Chang, Hung-Yin Pan, Hsu-Wei Fang, Ming-Te Huang, Ching-Kuo Chen
The speG gene has been reported to regulate polyamine metabolism in Escherichia coli and Shigella , but its role in Salmonella remains unknown. Our preliminary studies have revealed that speG widely affects the transcriptomes of infected in vitro M and Caco-2 cells and that it is required for the intracellular replication of Salmonella enterica serovar Typhimurium ( S . Typhimurium) in HeLa cells. In this study, we demonstrated that speG plays a time-dependent and cell type-independent role in the intracellular replication of S ...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29148379/characterization-of-streptococcus-pyogenes-from-animal-clinical-specimens-spain
#9
Ana Isabel Vela, Pilar Villalón, Juan Antonio Sáez-Nieto, Gema Chacón, Lucas Domínguez, José Francisco Fernández-Garayzábal
Streptococcus pyogenes appears to be almost exclusively restricted to humans, with few reports on isolation from animals. We provide a detailed characterization (emm typing, pulsed-field gel electrophoresis [PFGE], and multilocus sequence typing [MLST]) of 15 S. pyogenes isolates from animals associated with different clinical backgrounds. We also investigated erythromycin resistance mechanisms and phenotypes and virulence genes. We observed 2 emm types: emm12 (11 isolates) and emm77 (4 isolates). Similarly, we observed 2 genetic linages, sequence type (ST) 26 and ST63...
December 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28828864/reconfigurable-peptide-nanotherapeutics-at-tumor-microenvironmental-ph
#10
Zeng-Ying Qiao, Wen-Jing Zhao, Yu-Juan Gao, Yong Cong, Lina Zhao, Zhiyuan Hu, Hao Wang
Peptide nanomaterials have recently attracted considerable interest in the biomedical field. However, their poor bioavailability and less powerful therapeutic efficacy hamper their further applications. Herein, we discovered reconfigurable and activated nanotherapeutics in the tumor microenvironment. Two peptides, that is, a pH-responsive peptide HLAH and a matrix metalloprotease-2 (MMP2)-sensitive peptide with a poly(ethylene glycol) (PEG) terminal were conjugated onto the hydrophobic poly(β-thioester)s backbones to gain the copolymer P-S-H...
September 13, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28826663/exercise-responsive-phosphoproteins-in-the-heart
#11
Hongbo Guo, Ruth Isserlin, Andrew Emili, Jatin G Burniston
Endurance exercise improves cardiac performance and affords protection against cardiovascular diseases but the signalling events that mediate these benefits are largely unexplored. Phosphorylation is a widely studied post-translational modification involved in intracellular signalling, and to discover novel phosphorylation events associated with exercise we have profiled the cardiac phosphoproteome response to a standardised exercise test to peak oxygen uptake (VO2peak). Male Wistar rats (346±18g) were assigned to 3 independent groups (n=6, in each) that were familiarised with running on a motorised treadmill within a metabolic chamber...
October 2017: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/28732931/ultrasound-assisted-synthesis-of-ph-responsive-nanovector-based-on-peg-chitosan-coated-magnetite-nanoparticles-for-5-fu-delivery
#12
Sepideh Khoee, Ali Saadatinia, Reza Bafkary
pH-responsive magnetic carriers at the nanoscale are one of the most important agents for the targeted treatment of cancer. In this study, Fe3 O4 nanoparticles were prepared by co-precipitation method and functionalized with three types of PEG using ultrasound waves. PEGlated particles were modified with chitosan shell through ultrasound-assisted double emulsion method. The prepared material which was used as a pH responsive carrier for pinpointed 5-FU delivery. The chemico-physical properties of prepared nanoparticles have been investigated...
November 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28720201/exposure-to-buffer-solution-alters-tendon-hydration-and-mechanics
#13
Babak N Safa, Kyle D Meadows, Spencer E Szczesny, Dawn M Elliott
A buffer solution is often used to maintain tissue hydration during mechanical testing. The most commonly used buffer solution is a physiological concentration of phosphate buffered saline (PBS); however, PBS increases the tissue's water content and decreases its tensile stiffness. In addition, solutes from the buffer can diffuse into the tissue and interact with its structure and mechanics. These bathing solution effects can confound the outcome and interpretation of mechanical tests. Potential bathing solution artifacts, including solute diffusion, and their effect on mechanical properties, are not well understood...
August 16, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28719668/epidemiology-and-distribution-of-10-superantigens-among-invasive-streptococcus-pyogenes-disease-in-germany-from-2009-to-2014
#14
Matthias Imöhl, Christina Fitzner, Stephanie Perniciaro, Mark van der Linden
A nationwide laboratory-based surveillance study of invasive S. pyogenes infections was conducted in Germany. Invasive isolates (n = 719) were obtained between 2009 and 2014. Most isolates were obtained from blood (92.1%). The proportions of isolates from cerebrospinal fluid, pleural fluid, synovial fluid and peritoneal fluid were 3.9%, 1.8%, 1.7% and 0.6%, respectively. The most common emm types were emm 1 (31.8%), emm 28 (15.4%) and emm 89 (14.5%). The most common superantigen genes (speA, speC, speG, speH, speI, speJ, speK, speL, speM, ssa) identified from S...
2017: PloS One
https://www.readbyqxmd.com/read/28680421/an-emm5-group-a-streptococcal-outbreak-among-workers-in-a-factory-manufacturing-telephone-accessories
#15
Mingliang Chen, Wenqing Wang, Lihong Tu, Yaxu Zheng, Hao Pan, Gangyi Wang, Yanxin Chen, Xi Zhang, Linying Zhu, Jian Chen, Min Chen
Ranked among the top10 infectious causes of death worldwide, group A Streptococcus (GAS) causes small- and large-scale outbreaks, depending on the trigger as transmission of a GAS strain or expansion of predominant clones. In China, GAS infections other than scarlet fever are not notifiable. In Shanghai, an epidemiological investigation was initiated after two successive severe pneumonia cases with one death in a digital factory, from where outbreaks are less widely reported. The investigation was performed using emm typing, pulsed-field gel electrophoresis (PFGE) typing, superantigen profiling, and genome analysis...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28628457/clonal-clusters-and-virulence-factors-of-group-c-and-g-streptococcus-causing-severe-infections-manitoba-canada-2012-2014
#16
Sylvain A Lother, Walter Demczuk, Irene Martin, Michael Mulvey, Brenden Dufault, Philippe Lagacé-Wiens, Yoav Keynan
The incidence of group C and G Streptococcus (GCGS) bacteremia, which is associated with severe disease and death, is increasing. We characterized clinical features, outcomes, and genetic determinants of GCGS bacteremia for 89 patients in Winnipeg, Manitoba, Canada, who had GCGS bacteremia during 2012-2014. Of the 89 patients, 51% had bacteremia from skin and soft tissue, 70% had severe disease features, and 20% died. Whole-genome sequencing analysis was performed on isolates derived from 89 blood samples and 33 respiratory sample controls: 5 closely related genetic lineages were identified as being more likely to cause invasive disease than non-clade isolates (83% vs...
July 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28624463/insights-from-genotype-phenotype-correlations-by-novel-speg-mutations-causing-centronuclear-myopathy
#17
Haicui Wang, Claudia Castiglioni, Ayşe Kaçar Bayram, Fabiana Fattori, Serdar Pekuz, Diego Araneda, Hüseyin Per, Ricardo Erazo, Hakan Gümüş, Suzan Zorludemir, Kerstin Becker, Ximena Ortega, Jorge Alfredo Bevilacqua, Enrico Bertini, Sebahattin Cirak
Centronuclear myopathies (CNM) are a clinically and genetically heterogeneous group of congenital myopathies, defined histologically by increased number of fibres with centrally located nuclei, and type I fibre predominance in muscle biopsy. Myotubular myopathy, the X-linked form of CNM caused by mutations in the phosphoinositide phosphatase MTM1, is histologically characteristic since muscle fibres resemble myotubes. Here we present two unrelated patients with CNM and typical myotubular fibres in the muscle biopsy caused by mutations in striated muscle preferentially expressed protein kinase (SPEG)...
September 2017: Neuromuscular Disorders: NMD
https://www.readbyqxmd.com/read/28542873/a-map-of-the-phosphoproteomic-alterations-that-occur-after-a-bout-of-maximal-intensity-contractions
#18
Gregory K Potts, Rachel M McNally, Rocky Blanco, Jae-Sung You, Alexander S Hebert, Michael S Westphall, Joshua J Coon, Troy A Hornberger
KEY POINTS: Mechanical signals play a critical role in the regulation of muscle mass, but the molecules that sense mechanical signals and convert this stimulus into the biochemical events that regulate muscle mass remain ill-defined. Here we report a mass spectrometry-based workflow to study the changes in protein phosphorylation that occur in mouse skeletal muscle 1 h after a bout of electrically evoked maximal-intensity contractions (MICs). Our dataset provides the first comprehensive map of the MIC-regulated phosphoproteome...
August 1, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28463694/tumor-associated-macrophage-targeted-microrna-delivery-with-dual-responsive-polypeptide-nanovectors-for-anti-cancer-therapy
#19
Lanlan Liu, Huqiang Yi, Huamei He, Hong Pan, Lintao Cai, Yifan Ma
Repolarizing Tumor-associated macrophages (TAMs) to anti-tumor M1 macrophages with microRNA (miR) is a plausible approach for cancer treatment. However, how to achieve TAM-targeted miR delivery remains a challenge. The present study generated redox/pH dual-responsive hybrid polypeptide nanovectors, which consisted of self-crosslinked redox-responsive nanoparticles based on galactose-functionalized n-butylamine-poly(l-lysine)-b-poly(l-cysteine) polypeptides (GLC) coated with DCA-grafted sheddable PEG-PLL (sPEG) copolymers...
April 25, 2017: Biomaterials
https://www.readbyqxmd.com/read/28401320/the-virulence-factors-of-group-a-streptococcus-strains-isolated-from-invasive-and-non-invasive-infections-in-polish-and-german-centres-2009-2011
#20
M Strus, P B Heczko, E Golińska, A Tomusiak, A Chmielarczyk, M Dorycka, M van der Linden, A Samet, A Piórkowska
Streptococcus pyogenes (GAS) is one of the major human pathogenic bacteria that cause a wide range of diseases. Currently, increased incidence of streptococcal invasive infections is observed worldwide. In this study, we focused on the prevalence of genes encoding superantigens and type M proteins in the population of GAS strains from invasive versus non-invasive infections. We tested 253 GAS strains: 48 strains from patients with invasive infections (18 from wound/deep skin localization, 30 from women in labour) and 205 strains from non-invasive forms (147 from common infections of the upper respiratory, 49 from the vagina of females with genital tract infections and 9 from non-invasive wound and superficial skin infections)...
September 2017: European Journal of Clinical Microbiology & Infectious Diseases
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