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https://www.readbyqxmd.com/read/27899605/poly-a-specific-ribonuclease-regulates-the-processing-of-small-subunit-rrnas-in-human-cells
#1
Hideaki Ishikawa, Harunori Yoshikawa, Keiichi Izumikawa, Yutaka Miura, Masato Taoka, Yuko Nobe, Yoshio Yamauchi, Hiroshi Nakayama, Richard J Simpson, Toshiaki Isobe
Ribosome biogenesis occurs successively in the nucleolus, nucleoplasm, and cytoplasm. Maturation of the ribosomal small subunit is completed in the cytoplasm by incorporation of a particular class of ribosomal proteins and final cleavage of 18S-E pre-rRNA (18S-E). Here, we show that poly(A)-specific ribonuclease (PARN) participates in steps leading to 18S-E maturation in human cells. We found PARN as a novel component of the pre-40S particle pulled down with the pre-ribosome factor LTV1 or Bystin. Reverse pull-down analysis revealed that PARN is a constitutive component of the Bystin-associated pre-40S particle...
November 28, 2016: Nucleic Acids Research
https://www.readbyqxmd.com/read/27895308/epigenetic-inhibition-of-mir-663b-by-long-non-coding-rna-hotair-promotes-pancreatic-cancer-cell-proliferation-via-up-regulation-of-insulin-like-growth-factor-2
#2
Huihua Cai, Yong An, Xuemin Chen, Donglin Sun, Tongbing Chen, Yan Peng, Feng Zhu, Yong Jiang, Xiaozhou He
Pancreatic cancer is one of the most deadly cancers with a poor prognosis. Although microRNAs are involving in the carcinogenesis and development of pancreatic cancer, little information is known regarding the role of miR-663b in pancreatic cancer. In this study, the expression of miR-663b in pancreatic cancer cells was down-regulated by hypermethylation in its putative promoter region, and overexpression of miR-663b repressed cell proliferation, invasion and migration, and induced apoptosis in pancreatic cancer cells...
November 22, 2016: Oncotarget
https://www.readbyqxmd.com/read/27893747/analysis-of-the-function-of-apoptosis-during-imaginal-wing-disc-regeneration-in-drosophila-melanogaster
#3
Sandra Diaz-Garcia, Sara Ahmed, Antonio Baonza
Regeneration is the ability that allows organisms to replace missing organs or lost tissue after injuries. This ability requires the coordinated activity of different cellular processes, including programmed cell death. Apoptosis plays a key role as a source of signals necessary for regeneration in different organisms. The imaginal discs of Drosophila melanogaster provide a particularly well-characterised model system for studying the cellular and molecular mechanisms underlying regeneration. Although it has been shown that signals produced by apoptotic cells are needed for homeostasis and regeneration of some tissues of this organism, such as the adult midgut, the contribution of apoptosis to disc regeneration remains unclear...
2016: PloS One
https://www.readbyqxmd.com/read/27893630/a-comprehensive-in-vitro-comparison-of-preparation-techniques-for-fat-grafting
#4
Libor Streit, Josef Jaros, Veronika Sedlakova, Miroslava Sedlackova, Lubos Drazan, Michal Svoboda, Jakub Pospisil, Tomas Vyska, Jiri Vesely, Ales Hampl
BACKGROUND: Lipomodelling is a technique that uses patient's own fat for tissue regeneration and augmentation. The extent of regenerative effect is reported to be determined by the numbers of adipose tissue-derived stem cells (ASCs) and the viability of cells in processed adipose tissue, which, together with other factors, influence the degree of graft retention. This study addresses whether differences exist in properties of fat graft obtained by three commonly used techniques. METHODS: Adipose tissue harvested from the hypo-gastric regions of 14 patients was processed by decantation, centrifugation, and membrane-based tissue filtration...
November 21, 2016: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/27876947/a-survey-on-parasites-of-long-eared-hedgehog-hemiechinus-auritus-in-northeast-of-iran
#5
Ali Moshaverinia, Hassan Borji, Mehrab Kameli, Sara Ghabdian, Reza Ghanei
As there appeared to be no data available on parasite infection of Hedgehogs in the region and considering the potential threat of Hedgehogs for animal and public health, the present study was carried out using biological samples and necropsy findings collected from long-eared hedgehog captured in Mashhad city in the northeast of Iran. During the study 23 dead hedgehogs were collected randomly from different regions of Mashhad County. Following autopsy of these animals, observation for enteric parasites was carefully done...
December 2016: Journal of Parasitic Diseases: Official Organ of the Indian Society for Parasitology
https://www.readbyqxmd.com/read/27876612/lethal-distemper-in-badgers-meles-meles-following-epidemic-in-dogs-and-wolves
#6
Daria Di Sabatino, Gabriella Di Francesco, Guendalina Zaccaria, Daniela Malatesta, Luca Brugnola, Maurilia Marcacci, Ottavio Portanti, Fabrizio De Massis, Giovanni Savini, Liana Teodori, Enzo Ruggieri, Iolanda Mangone, Pietro Badagliacca, Alessio Lorusso
Canine distemper virus (CDV) represents an important conservation threat to many wild carnivores. A large distemper epidemic sustained by an Arctic-lineage strain occurred in Italy in 2013, mainly in the Abruzzi region, causing overt disease in domestic and shepherd dogs, Apennine wolves (Canis lupus) and other wild carnivores. Two badgers were collected by the end of September 2015 in a rural area of the Abruzzi region and were demonstrated to be CDV-positive by real time RT-PCR and IHC in several tissues...
October 27, 2016: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/27871132/aspergillus-penicillioides-differentiation-and-cell-division-at-0-585-water-activity
#7
Andrew Stevenson, Philip G Hamill, Callum J O'Kane, Gerhard Kminek, John D Rummel, Mary A Voytek, Jan Dijksterhuis, John E Hallsworth
Water availability acts as the most-stringent constraint for life on Earth. Thus, understanding the water relations of microbial extremophiles is imperative to our ability to increase agricultural productivity (e.g., by enhancing the processing and turnover of dead organic matter in soils of arid regions); reduce human exposure to mycotoxins in buildings and our food-supply chain; prevent the spoilage of foods/animal feeds, books, museum specimens and artworks; and better control microbiology of industrial fermentations...
November 21, 2016: Environmental Microbiology
https://www.readbyqxmd.com/read/27862555/genomic-epidemiology-of-cryptococcus-yeasts-identifies-adaptation-to-environmental-niches-underpinning-infection-across-an-african-hiv-aids-cohort
#8
Mathieu Vanhove, Mathew A Beale, Johanna Rhodes, Duncan Chanda, Shabir Lakhi, Geoffrey Kwenda, Sile Molloy, Natasha Karunaharan, Neil Stone, Thomas S Harrison, Tihana Bicanic, Matthew C Fisher
Emerging infections caused by fungi have become a widely recognized global phenomenon and are causing an increasing burden of disease. Genomic techniques are providing new insights into the structure of fungal populations, revealing hitherto undescribed fine-scale adaptations to environments and hosts that govern their emergence as infections. Cryptococcal meningitis is a neglected tropical disease that is responsible for a large proportion of AIDS-related deaths across Africa; however, the ecological determinants that underlie a patient's risk of infection remain largely unexplored...
October 19, 2016: Molecular Ecology
https://www.readbyqxmd.com/read/27858515/eif4b-stimulates-eif4a-atpase-and-unwinding-activities-by-direct-interaction-through-its-7-repeats-region
#9
Alexandra Zoi Andreou, Ulf Harms, Dagmar Klostermeier
Eukaryotic translation initiation starts with binding of the eIF4F complex to the 5'-m7G cap of the mRNA. Recruitment of the 43S pre-initiation complex (PIC), formed by the 40S ribosomal subunit and other translation initiation factors, leads to formation of the 48S PIC that then scans the 5'-untranslated region (5'-UTR) towards the start codon. The eIF4F complex consists of eIF4E, the cap binding protein, eIF4A, a DEAD-box RNA helicase that is believed to unwind secondary structures in the 5'UTR during scanning, and eIF4G, a scaffold protein that binds to both eIF4E and eIF4A...
November 18, 2016: RNA Biology
https://www.readbyqxmd.com/read/27856637/tgf-%C3%AE-smad3-pathway-stimulates-sphingosine-1-phosphate-receptor-3-expression-implication-of-sphingosine-1-phosphate-receptor-3-in-lung-adenocarcinoma-progression
#10
Jiawei Zhao, Jingjing Liu, Jen-Fu Lee, Wenliang Zhang, Mustapha Kandouz, Garrett C VanHecke, Shiyou Chen, Young-Hoon Ahn, Fulvio Lonardo, Menq-Jer Lee
Previously, we showed that levels of sphingosine-1-phosphate receptor 3 (S1PR3) are increased in a panel of cultured human lung adenocarcinoma cell lines, and that S1PR3-mediated signaling pathways regulate proliferation, soft agar growth, and invasion of human lung adenocarcinoma cells in vitro. In the present study, we examine S1PR3 levels in human lung adenocarcinoma specimens. cDNA array and tumor microarray analysis shows that mRNA and protein levels of S1PR3 are significantly increased in human lung adenocarcinomas, compared to normal lung epithelial cells...
November 17, 2016: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/27848157/competition-for-dead-trees-between-humans-and-aye-ayes-daubentonia-madagascariensis-in-central-eastern-madagascar
#11
Rose T Miller, Jean-Luc Raharison, Mitchell T Irwin
The destruction and degradation of forest habitats are major threats to the sustainability of lemur populations in Madagascar. Madagascan landscapes often contain forest fragments that represent refuges for native fauna, while also being used for firewood and timber by local human populations. As undisturbed forest becomes increasingly scarce, understanding resource competition between humans and wildlife in disturbed habitats will be increasingly important. We tested the hypothesis that Malagasy and aye-ayes (Daubentonia madagascariensis) compete for the limited number of dead trees in rainforest fragments at Tsinjoarivo, Madagascar...
November 15, 2016: Primates; Journal of Primatology
https://www.readbyqxmd.com/read/27834329/epidemiology-risk-factors-of-scrub-typhus-in-south-india
#12
George M Varghese, Deepa Raj, Mark R Francis, Rajiv Sarkar, Paul Trowbridge, Jayaprakash Muliyil
BACKGROUND & OBJECTIVES: Scrub typhus is a major public health threat in South and Southeastern Asian countries including India. Understanding local patterns of disease and factors that place individuals at risk is pivotal to future preventive measures against scrub typhus. The primary aim of this study was to identify specific epidemiological and geographical factors associated with an increased risk of developing scrub typhus in this region. METHODS: We mapped 709 patients from Tamil Nadu, Andhra Pradesh and Telangana who were admitted to the Christian Medical College (CMC) Hospital, Vellore, Tamil Nadu, India, for the period 2006-2011, assessed seasonality using monthly counts of scrub typhus cases, and conducted a case-control study among a subset of patients residing in Vellore...
July 2016: Indian Journal of Medical Research
https://www.readbyqxmd.com/read/27823995/analysis-of-in-hospital-neonatal-death-in-the-tertiary-neonatal-intensive-care-unit-in-china-a-multicenter-retrospective-study
#13
Chen-Hong Wang, Li-Zhong Du, Xiao-Lu Ma, Li-Ping Shi, Xiao-Mei Tong, Hong Liu, Guo-Fang Ding, Bin Yi, Xin-Nian Pan, Dan-Ni Zhong, Ling Liu, Mei Li, Cui-Qing Liu, Shi-Wen Xia, Hong-Yun Wang, Ling He, Kun Liang, Xiao-Yu Zhou, Shu-Ping Han, Qin Lyu, Yin-Ping Qiu, Ruo-Bing Shan, De-Zhi Mu, Xiao-Hong Liu, Si-Qi Zhuang, Jing Guo, Li Liu, Jia-Jun Zhu, Hong Xiong
BACKGROUND: Globally, the proportion of child deaths that occur in the neonatal period remains a high level of 37-41%. Differences of cause in neonate death exist in different regions as well as in different economic development countries. The specific aim of this study was to investigate the causes, characteristics, and differences of death in neonates during hospitalization in the tertiary Neonatal Intensive Care Unit (NICU) of China. METHODS: All the dead neonates admitted to 26 NICUs were included between January l, 2011, and December 31, 2011...
2016: Chinese Medical Journal
https://www.readbyqxmd.com/read/27821408/a-novel-translational-control-mechanism-involving-rna-structures-within-coding-sequences
#14
Jennifer Jungfleisch, Danny D Nedialkova, Ivan Dotu, Katherine E Sloan, Neus Martinez-Bosch, Lukas Brüning, Emanuele Raineri, Pilar Navarro, Markus T Bohnsack, Sebastian A Leidel, Juana Diez
The impact of RNA structures in coding sequences (CDS) within mRNAs is poorly understood. Here we identify a novel and highly conserved mechanism of translational control involving RNA structures within coding sequences and the DEAD-box helicase Dhh1. Using yeast genetics and genome-wide ribosome profiling analyses we show that this mechanism, initially derived from studies of the Brome Mosaic virus RNA genome, extends to yeast and human mRNAs highly enriched in membrane and secreted proteins. All Dhh1-dependent mRNAs, viral and cellular, share key common features...
November 7, 2016: Genome Research
https://www.readbyqxmd.com/read/27813083/dbpa-is-a-region-specific-rna-helicase
#15
Anthony F T Moore, Riley C Gentry, Eda Koculi
DbpA is a DEAD-box RNA helicase implicated in RNA structural rearrangements in the peptidyl transferase center. DbpA contains an RNA binding domain, responsible for tight binding of DbpA to hairpin 92 of 23S ribosomal RNA, and a RecA-like catalytic core responsible for double-helix unwinding. It is not known if DbpA unwinds only the RNA helices that are part of a specific RNA structure, or if DbpA unwinds any RNA helices within the catalytic core's grasp. In other words, it is not known if DbpA is a site-specific enzyme or region-specific enzyme...
November 4, 2016: Biopolymers
https://www.readbyqxmd.com/read/27812070/the-global-polio-eradication-initiative-gpei-in-pakistan
#16
Nighat Jahan Nadeem
The Global Polio Eradication Initiative (GPEI) has significantly reduced the worldwide incidence of poliomyelitis. However, polio remains endemic in Pakistan which poses a threat to the success of the GPEI. Issues faced by Pakistan relate to politics, terrorism, war, natural disasters, funding constraints, misconceptions and inadequate infrastructure. These contribute in hampering the aims of the GPEI and allow the deadly poliovirus to maintain its reservoir in Pakistan. Until polio is completely eradicated, all countries remain at risk of its re-emergence and this is of grave concern as potentially it could reverse the polio-free certified status of a whole World Health Organisation (WHO) region...
November 2016: JPMA. the Journal of the Pakistan Medical Association
https://www.readbyqxmd.com/read/27809401/lagged-cumulative-spruce-budworm-defoliation-affects-the-risk-of-fire-ignition-in-ontario-canada
#17
Patrick M A James, Louis-Etienne Robert, B M Wotton, David L Martell, Richard A Fleming
Detailed understanding of forest disturbance interactions is needed for effective forecasting, modelling, and management. Insect outbreaks are a significant forest disturbance that alters forest structure as well as the distribution and connectivity of combustible fuels at broad spatial scales. The effect of insect outbreaks on fire activity is an important but contentious issue with significant policy consequences. The eastern spruce budworm (Choristoneura fumiferana) is a native defoliating insect in eastern North America whose periodic outbreaks create large patches of dead fir and spruce trees...
November 3, 2016: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/27805998/big-children-or-little-adults-a-statewide-analysis-of-adolescent-isolated-severe-traumatic-brain-injury-outcomes-at-pediatric-versus-adult-trauma-centers
#18
Brian W Gross, Mathew M Edavettal, Alan D Cook, Cole D Rinehart, Caitlin A Lynch, Eric H Bradburn, Daniel Wu
BACKGROUND: The appropriate managing center for adolescent trauma patients is debated. We sought to determine whether outcome differences existed for adolescent severe traumatic brain injury (sTBI) patients treated at pediatric versus adult trauma centers. We hypothesized that no difference in mortality, functional status at discharge (FSD) or overall complication rate would be observed between center types. METHODS: All adolescent trauma patients (aged 15-17 years) presenting with isolated sTBI (head Abbreviated Injury Scale [AIS] score ≥3; all other AIS body region scores ≤2) to accredited level I-II trauma centers in Pennsylvania from 2003-2015 were extracted from the Pennsylvania Trauma Outcome Study database...
October 31, 2016: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/27795409/structural-biology-of-the-arterivirus-nsp11-endoribonucleases
#19
Manfeng Zhang, Xiaorong Li, Zengqin Deng, Zhenhang Chen, Yang Liu, Yina Gao, Wei Wu, Zhongzhou Chen
: Endoribonuclease (NendoU) is unique and conserved as a major genetic marker in nidoviruses that infect vertebrate hosts. Arterivirus non-structural protein (nsp) 11 was shown to have NendoU activity and play essential roles in the viral life cycle. Here, we report three crystal structures of porcine reproductive and respiratory syndrome virus (PRRSV) and equine arteritis virus (EAV) nsp11 mutants. The structures of arterivirus nsp11 contain two conserved compact domains: N-terminal domain (NTD) and C-terminal domain (CTD)...
October 19, 2016: Journal of Virology
https://www.readbyqxmd.com/read/27793833/drh1-a-p68-related-rna-helicase-is-required-for-chromosome-breakage-in-tetrahymena
#20
Stephen L McDaniel, Erica Zweifel, Peter K W Harris, Meng-Chao Yao, Eric S Cole, Douglas L Chalker
The p68 DEAD box helicases comprise a widely conserved protein family involved in a large range of biological processes including transcription, splicing, and translation. The genome of the ciliate Tetrahymena thermophila encodes two p68-like helicases, DRH1 and LIA2 We show that DRH1 is essential for growth and completion of development. In growing cells, Drh1p is excluded from the nucleus and accumulates near cortical basal bodies. In contrast, during sexual reproduction, this protein localizes to meiotic micronuclei, initially in punctate foci in regions where centromeres and telomeres are known to reside and later in post-zygotic differentiating somatic macronuclei...
October 28, 2016: Biology Open
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