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951.
Fiannaca Antonino La Rosa Massimo La Paglia Laura Urso Alfonso 《BMC bioinformatics》2018,19(15):434-71
Background
microRNAs act as regulators of gene expression interacting with their gene targets. Current bioinformatics services, such as databases of validated miRNA-target interactions and prediction tools, usually provide interactions without any information about what tissue that interaction is more likely to appear nor information about the type of interactions, causing mRNA degradation or translation inhibition respectively.Results
In this work, we introduce miRTissue, a web application that combines validated miRNA-target interactions with statistical correlation among expression profiles of miRNAs, genes and proteins in 15 different human tissues. Validated interactions are taken from the miRTarBase database, while expression profiles are downloaded from The Cancer Genome Atlas repository. As a result, the service provides a tissue-specific characterisation of each couple of miRNA and gene together with its statistical significance (p-value). The inclusion of protein data also allows providing the type of interaction. Moreover, miRTissue offers several views for analysing interactions, focusing for example on the comparison between different cancer types or different tissue conditions. All the results are freely downloadable in the most common formats.Conclusions
miRTissue fills a gap concerning current bioinformatics services related to miRNA-target interactions because it provides a tissue-specific context to each validated interaction and the type of interaction itself. miRTissue is easily browsable allowing the user to select miRNAs, genes, cancer types and tissue conditions. The results can be sorted according to p-values to immediately identify those interactions that are more likely to occur in a given tissue. miRTissue is available at http://tblab.pa.icar.cnr.it/mirtissue.html.952.
Rosa van den Berg Sander Kooijman Raymond Noordam Ashna Ramkisoensing Gustavo Abreu-Vieira Lauren L. Tambyrajah Wieneke Dijk Philip Ruppert Isabel M. Mol Barbara Kramar Rosanna Caputo Laura Sardón Puig Evelien M. de Ruiter Jan Kroon Menno Hoekstra Ronald J. van der Sluis Onno C. Meijer Ko Willems van Dijk Patrick C.N. Rensen 《Cell reports》2018,22(13):3521-3533
953.
Single step recombinant human growth hormone (rhGH) purification from milk by peptide affinity chromatography 下载免费PDF全文
Soledad L. Saavedra María C. Martínez Ceron Silvana L. Giudicessi Guillermina Forno María Belén Bosco Mariela M. Marani Rosa Erra‐Balsells Fernando Albericio Osvaldo Cascone Silvia A. Camperi 《Biotechnology progress》2018,34(4):999-1005
Recombinant human growth hormone (rhGH) is used for the treatment of several pathologies, most of them related to growth. Although different expression systems can be used for its production, the milk from transgenic cows is one of the most interesting due to the high rhGH level achieved (5 g/L). We have designed and synthesized short peptides (9 or 10 amino acid long) using Fmoc chemistry and studied their ability to purify rhGH from milk once immobilized on an agarose support. Using spiked milk with the hormone as a sample, rhGH was purified with 88% yield and 92% purity in a single step with a fold purification of 4.5. © 2018 American Institute of Chemical Engineers Biotechnol. Prog., 34:999–1005, 2018 相似文献
954.
Epithelia and endothelia delineate tissue compartments and control their environments by regulating the passage of ions and solutes. This barrier function is essential for the development and maintenance of multicellular organisms, and its dysfunction is associated with numerous human diseases. Recent advances in biomaterials and microfabrication technologies have evolved in vitro approaches for modelling biological barriers. Current microphysiological systems have become more efficient and reliable in mimicking the cell microenvironment. Additionally, methods for the quantification of barrier permeability have long provided significant insight into their underlying mechanisms. In this review, we outline the current techniques to quantify the barrier function of engineered tissues, and we also give an overview of recent microphysiological systems of biological barriers that emulate the microenvironment and microarchitecture of native tissues. 相似文献
955.
M. Cecília Almadanim Nuno M. Gonçalves Margarida T.G. Rosa Bruno M. Alexandre André M. Cordeiro Mafalda Rodrigues Nelson J.M. Saibo Cláudio M. Soares Célia V. Romão M. Margarida Oliveira Isabel A. Abreu 《Biochimica et Biophysica Acta (BBA)/Molecular Cell Research》2018,1865(2):231-246
Plant calcium-dependent protein kinases (CDPKs) are key proteins implicated in calcium-mediated signaling pathways of a wide range of biological events in the organism. The action of each particular CDPK is strictly regulated by many mechanisms in order to ensure an accurate signal translation and the activation of the adequate response processes. In this work, we investigated the regulation of a CDPK involved in rice cold stress response, OsCPK17, to better understand its mode of action. We identified two new alternative splicing (AS) mRNA forms of OsCPK17 encoding truncated versions of the protein, missing the CDPK activation domain. We analyzed the expression patterns of all AS variants in rice tissues and examined their subcellular localization in onion epidermal cells. The results indicate that the AS of OsCPK17 putatively originates truncated forms of the protein with distinct functions, and different subcellular and tissue distributions. Additionally, we addressed the regulation of OsCPK17 by post-translational modifications in several in vitro experiments. Our analysis indicated that OsCPK17 activity depends on its structural rearrangement induced by calcium binding, and that the protein can be autophosphorylated. The identified phosphorylation sites mostly populate the OsCPK17 N-terminal domain. Exceptions are phosphosites T107 and S136 in the kinase domain and S558 in the C-terminal domain. These phosphosites seem conserved in CDPKs and may reflect a common regulatory mechanism for this protein family. 相似文献
956.
Mocelin Ricieri Marcon Matheus D’ambros Simone Herrmann Ana P. da Rosa Araujo Alex Sander Piato Angelo 《Neurochemical research》2018,43(2):458-464
Neurochemical Research - Alcohol hangover refers to unpleasant symptoms experienced as a direct consequence of a binge drinking episode. The effects observed in this condition are related to the... 相似文献
957.
Lázaro Hernández Daviel Gómez Bárbara Valle Christoph C. Tebbe Richard Trethowan Rosa Acosta Lourdes Yabor José Carlos Lorenzo 《Acta Physiologiae Plantarum》2018,40(9):163
Chemical mutagens, such as sodium azide, have attracted the interest of plant breeders. Azide creates DNA point mutations and affects plant growth and development, disturbs metabolic activity and inhibits protein and DNA replication, whereas mannitol is used to simulate drought stresses in tissue culture. To identify biochemical markers for stress tolerance, maize seeds were germinated under mannitol and sodium azide induced stress in controlled conditions for 7 days. Then levels of chlorophyll, carotenoids, phenolics and aldehydes produced were subsequently determined. Germination percentage was not affected by either mannitol or sodium azide and was always above 85%. However, total fresh weight decreased by 50% with the application of 153.4 mM mannitol and 0.26 mM azide in combination. This treatment significantly reduced plantlet growth from 0.94 g in the control to 0.53 g in the treated materials. Root weight reduced by 68.1%, cotyledons by 14.3%, stems by 65.0% and leaves by 70.0% in treated samples. The level of carotenoids in roots was the clearest biochemical indicator of stress produced by the mannitol and sodium azide treatment. Carotenoids increased from 0.01 µg g??1 fresh weight in the control to 9.03 µg g??1 fresh weight in the treated materials. A large-scale seed treatment with mannitol and sodium azide was carried out. 2296 seeds were placed in magenta containers with 153.4 mM mannitol and 0.26 mM NaN3. At 7 days of germination, the heaviest seedlings (450) (450/2296?=?20%) were transferred to soil environment. Forty-two plants (42/450?=?9.3%) were off-type phenotypes at 45 days. Genetic variants may have been obtained following the novel procedure described here which combines chronic treatment with sodium azide and selection pressure with mannitol to simulate drought conditions. 相似文献
958.
Alessandro Cresci Rosario De Rosa Silvia Fraissinet Martina Scanu Nathan F. Putman Claudio Agnisola 《Acta ethologica》2018,21(3):195-201
How animals integrate different sensory information for orientation is a complex process involving interactions between a variety of internal and external factors. Due to this complexity, each component of a suite of factors is typically studied in isolation. Here, we examine how an internal factor (personality of fish) influences the response of zebrafish (Danio rerio) to the magnetic field, while swimming in a flow chamber. Our previous work demonstrated that the orientation to the water current (rheotaxis) of zebrafish individuals is influenced by variations of the magnetic field only when fish are part of a shoal. In this study, we evaluated the rheotactic behavior of 20 fish, grouped in shoals of “proactive” or “reactive” individuals, under magnetic fields of different directions. We found that the magnetic field influenced at which water speed rheotaxis was elicited in zebrafish with “reactive” personality, but not in those with “proactive” personality. These results suggest that fish personality influences response to or weighing of sensory inputs and provides some insight on the variation in behavioral responses to environmental stimuli in both laboratory and natural settings. 相似文献
959.
A. M. Ferraris Rosa Mangerini Gian Franco Gaetani Cristina Romei Aldo Pinchera Furio Pacini 《Human genetics》1997,99(2):202-205
Multiple endocrine neoplasia type 2 (MEN 2) is a dominantly inherited cancer syndrome characterized by medullary thyroid
carcinoma (MTC) and other tumors. Since MTC can also occur in a sporadic form and as familial medullary thyroid carcinoma,
this neoplasm offers a unique opportunity to investigate the difference of origin, if any, between the sporadic and the hereditary
forms of a tumor. While sporadic malignancies have usually been found to result from a mutational event occurring at the single-cell
level and are therefore monoclonal, studies on hereditary neoplasms have been scarce and often produced conflicting results.
In order to determine the clonal origin of sporadic MTCs and of those occurring in MEN 2 syndromes we used a clonality assay
based on a polymorphic trinucleotide repeat of the X-linked human androgen-receptor gene. We found that 10 out of 11 MTCs
expressed a polyclonal pattern of X inactivation, including a significant percentage of the cases clinically defined as sporadic.
Received: 21 May 1996 / Revised: 14 August 1996 相似文献
960.
Benedetti Ettore Iacovino Rosa Pedone Carlo Rossi Filomena Saviano Michele Isernia Carla Montesarchio Daniela de Napoli Lorenzo Piccialli Gennaro 《International journal of peptide research and therapeutics》1997,4(3):129-134
Summary An N- and C-protected derivative ofhomo-β-leucine, Fmoc-homo-β-(S)-leucine methyl ester, synthesized from the corresponding proteinogenic parent α-amino acid in enantiopure form has been
fully characterized in the solid state by X-ray diffraction analysis. The crystal conformation of this new residue indicates
and extended conformation for thishomo-β-residue, with the ϕ torsion angle being more constrained than the μ and ψ angles. 相似文献