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https://www.readbyqxmd.com/read/29324689/characterization-of-translationally-controlled-tumour-protein-from-the-sea-anemone-anemonia-viridis-and-transcriptome-wide-identification-of-cnidarian-homologues
#1
Aldo Nicosia, Carmelo Bennici, Girolama Biondo, Salvatore Costa, Marilena Di Natale, Tiziana Masullo, Calogera Monastero, Maria Antonietta Ragusa, Marcello Tagliavia, Angela Cuttitta
Gene family encoding translationally controlled tumour protein (TCTP) is defined as highly conserved among organisms; however, there is limited knowledge of non-bilateria. In this study, the first TCTP homologue from anthozoan was characterised in the Mediterranean Sea anemone, Anemonia viridis. The release of the genome sequence of Acropora digitifera, Exaiptasia pallida, Nematostella vectensis and Hydra vulgaris enabled a comprehensive study of the molecular evolution of TCTP family among cnidarians. A comparison among TCTP members from Cnidaria and Bilateria showed conserved intron exon organization, evolutionary conserved TCTP signatures and 3D protein structure...
January 11, 2018: Genes
https://www.readbyqxmd.com/read/29285938/novel-kunitz-like-peptides-discovered-in-the-zoanthid-palythoa-caribaeorum-through-transcriptome-sequencing
#2
Qiwen Liao, Shengnan Li, Shirley Weng In Siu, Binrui Yang, Chen Huang, Judy Yuet-Wa Chan, Jean-Étienne Morlighem, Clarence Tsun Ting Wong, Gandhi Radis-Baptista, Simon Ming-Yuen Lee
Palythoa caribaeorum (class Anthozoa) is a zoanthid that together jellyfishes, hydra, and sea anemones, which are venomous and predatory, belongs to the Phyllum Cnidaria. The distinguished feature in these marine animals is the cnidocytes in the body tissues, responsible for toxin production and injection that are used majorly for prey capture and defense. With exception for other anthozoans, the toxin cocktails of zoanthids have been scarcely studied and are poorly known. Here, based on the analysis of P. caribaeorum transcriptome, numerous predicted venom-featured polypeptides were identified, including allergens, neurotoxins, membrane-active and Kunitz-like peptides (PcKuz)...
December 29, 2017: Journal of Proteome Research
https://www.readbyqxmd.com/read/29282837/do-reef-corals-age
#3
John C Bythell, Barbara E Brown, Thomas B L Kirkwood
Hydra is emerging as a model organism for studies of ageing in early metazoan animals, but reef corals offer an equally ancient evolutionary perspective as well as several advantages, not least being the hard exoskeleton which provides a rich fossil record as well as a record of growth and means of ageing of individual coral polyps. Reef corals are also widely regarded as potentially immortal at the level of the asexual lineage and are assumed not to undergo an intrinsic ageing process. However, putative molecular indicators of ageing have recently been detected in reef corals...
December 28, 2017: Biological Reviews of the Cambridge Philosophical Society
https://www.readbyqxmd.com/read/29280172/modelling-the-ph-ammonia-toxicity-relationship-for-hydra-viridissima-in-soft-waters-with-low-ionic-concentrations
#4
Thomas J Mooney, Ceiwen Pease, Melanie Trenfield, Rick van Dam, Andrew J Harford
There is limited data concerning the toxicity of ammonia in fresh soft-waters. Ammonia toxicity is largely dependent on pH and temperature. The USEPA have derived equations to adjust species toxicity estimates based on changes in pH and temperature. It has been reported that the pH-ammonia toxicity relationship, derived by the USEPA, may differ in waters with low ionic concentrations due to the absence of potentially ameliorative ionic constituents. The present study aimed to assess the pH-ammonia toxicity relationship for the tropical green hydra, Hydra viridissima, across a range of pH in a natural water with low ionic content...
December 26, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/29262375/physical-mechanisms-driving-cell-sorting-in-hydra
#5
Olivier Cochet-Escartin, Tiffany T Locke, Winnie H Shi, Robert E Steele, Eva-Maria S Collins
Cell sorting, whereby a heterogeneous cell mixture organizes into distinct tissues, is a fundamental patterning process in development. Hydra is a powerful model system for carrying out studies of cell sorting in three dimensions, because of its unique ability to regenerate after complete dissociation into individual cells. The physicists Alfred Gierer and Hans Meinhardt recognized Hydra's self-organizing properties more than 40 years ago. However, what drives cell sorting during regeneration of Hydra from cell aggregates is still debated...
December 19, 2017: Biophysical Journal
https://www.readbyqxmd.com/read/29262354/sorting-things-out-cell-sorting-during-hydra-regeneration
#6
Daniel J Cohen
No abstract text is available yet for this article.
December 19, 2017: Biophysical Journal
https://www.readbyqxmd.com/read/29220192/fluidic-microactuation-of-flexible-electrodes-for-neural-recording
#7
Flavia Vitale, Daniel Vercosa, Alexander V Rodriguez, Sushma Sri Pamulapati, Frederik Seibt, Eric Lewis, Jiaxi Stephen Yan, Krishna Badhiwala, Mohammed Adnan, Gianni Royer-Carfagni, Michael Beierlein, Caleb Kemere, Matteo Pasquali, Jacob Robinson
Soft and conductive nanomaterials like carbon nanotubes, graphene, and nanowire scaffolds have expanded the family of ultra-flexible microelectrodes that can bend and flex with the natural movement of the brain, reduce the inflammatory response and improve the stability of long-term neural recordings. However, current methods to implant these highly flexible electrodes rely on temporary stiffening agents that temporarily increase the electrode size and stiffness thus aggravating neural damage during implantation, which can lead to cell loss and glial activation that persists even after the stiffening agents are removed or dissolve...
December 8, 2017: Nano Letters
https://www.readbyqxmd.com/read/29216486/the-effects-of-microplastic-on-freshwater-hydra-attenuata-feeding-morphology-reproduction
#8
Fionn Murphy, Brian Quinn
Microplastic pollution has been a growing concern in the aquatic environment for several years. The abundance of microplastics in the environment has invariably led them to interact with a variety of different aquatic species. The small size of microplastics may make them bioavailable to a great range of species however, the impact this may have is not fully understood. Much of the research on microplastic pollution has focused on the marine environment and species with little research undertaken in freshwater...
December 4, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29203218/the-modern-hydra-perioperative-stroke-and-cardiac-surgery
#9
EDITORIAL
Brent Keeling, Michael E Halkos
No abstract text is available yet for this article.
December 1, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/29198427/towards-the-identification-of-ancestrally-shared-regenerative-mechanisms-across-the-metazoa-a-transcriptomic-case-study-in-the-demosponge-halisarca-caerulea
#10
Nathan J Kenny, Jasper M de Goeij, Didier M de Bakker, Casey G Whalen, Eugene Berezikov, Ana Riesgo
Regeneration is an essential process for all multicellular organisms, allowing them to recover effectively from internal and external injury. This process has been studied extensively in a medical context in vertebrates, with pathways often investigated mechanistically, both to derive increased understanding and as potential drug targets for therapy. Several species from other parts of the metazoan tree of life, including Hydra, planarians and echinoderms, noted for their regenerative capabilities, have previously been targeted for study...
November 29, 2017: Marine Genomics
https://www.readbyqxmd.com/read/29162937/spontaneous-body-contractions-are-modulated-by-the-microbiome-of-hydra
#11
Andrea P Murillo-Rincon, Alexander Klimovich, Eileen Pemöller, Jan Taubenheim, Benedikt Mortzfeld, René Augustin, Thomas C G Bosch
Spontaneous contractile activity, such as gut peristalsis, is ubiquitous in animals and is driven by pacemaker cells. In humans, disruption of the contraction pattern leads to gastrointestinal conditions, which are also associated with gut microbiota dysbiosis. Spontaneous contractile activity is also present in animals lacking gastrointestinal tract. Here we show that spontaneous body contractions in Hydra are modulated by symbiotic bacteria. Germ-free animals display strongly reduced and less regular contraction frequencies...
November 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29158062/effect-of-change-in-fluid-status-evaluated-by-bioimpedance-techniques-on-body-composition-in-hemodialysis-patients
#12
Samer R Abbas, Stephan Thijssen, Erik L Penne, Jochen G Raimann, Li Liu, Murat H Sipahioglu, Eric Seibert, Yuedong Wang, Yuqi Chen, Qingqing Xiao, Nathan W Levin, Peter Kotanko, Fansan Zhu
OBJECTIVE: This prospective study uses calf bioimpedance spectroscopy (cBIS) to guide the attainment of dry weight (DWcBIS) in chronic hemodialysis (HD) patients. The primary aim of this study was to evaluate whether body composition is altered when fluid status is reduced to DWcBIS. METHODS: Target post-HD weight was gradually reduced from baseline (BL) until DWcBIS was achieved. DWcBIS was defined as the presence of both flattening of the curve of extracellular resistance and the attainment calf normalized resistivity in the normal range during the dialysis treatment...
November 18, 2017: Journal of Renal Nutrition
https://www.readbyqxmd.com/read/29115695/a-standardized-tri-trophic-small-scale-system-tricosm-for-the-assessment-of-stressor-induced-effects-on-aquatic-community-dynamics
#13
Verena Riedl, Annika Agatz, Rachel Benstead, Roman Ashauer
Chemical impacts on the environment are routinely assessed in single-species tests. They are employed to measure direct effects on non-target organisms but indirect effects on ecological interactions can only be detected in multi-species tests. Micro- and mesocosms are more complex and environmentally realistic, yet, they are less frequently used for environmental risk assessment because resource demand is high while repeatability and statistical power are often low. Test systems fulfilling regulatory needs (i...
November 8, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/29109978/dust-formation-and-wind-acceleration-around-the-aluminum-oxide-rich-agb-star-w-hydrae
#14
Aki Takigawa, Takafumi Kamizuka, Shogo Tachibana, Issei Yamamura
Dust grains, formed around asymptotic giant branch (AGB) stars, are accelerated by stellar radiation to drive stellar winds, which supply freshly synthesized nuclides to the Galaxy. Silicate is the dominant dust species in space, but ~40% of oxygen-rich AGB stars are thought to have comparable amounts of aluminum oxide dust. Dust formation and the wind-driving mechanism around these oxygen-rich stars, however, are poorly understood. We report on the spatial distributions of AlO and (29)SiO molecules around an aluminum oxide-rich M-type AGB star, W Hydrae, based on observations obtained with the Atacama Large Millimeter/submillimeter Array...
November 2017: Science Advances
https://www.readbyqxmd.com/read/29108673/%C3%AE-catenin-acts-in-a-position-independent-regeneration-response-in-the-simple-eumetazoan-hydra
#15
S Gufler, B Artes, H Bielen, I Krainer, M-K Eder, J Falschlunger, A Bollmann, T Ostermann, T Valovka, M Hartl, K Bister, U Technau, B Hobmayer
Wnt/β-Catenin signaling plays crucial roles in regenerative processes in eumetazoans. It also acts in regeneration and axial patterning in the simple freshwater polyp Hydra, whose morphallactic regenerative capacity is unparalleled in the animal kingdom. Previous studies have identified β-catenin as an early response gene activated within the first 30min in Hydra head regeneration. Here, we have studied the role of β-Catenin in more detail. First, we show that nuclear β-Catenin signaling is required for head and foot regeneration...
September 21, 2017: Developmental Biology
https://www.readbyqxmd.com/read/29072192/k-edge-energy-based-calibration-method-for-photon-counting-detectors
#16
Yongshuai Ge, Xu Ji, Ran Zhang, Ke Li, Guang-Hong Chen
In recent years, potential applications of energy-resolved photon counting detectors (PCDs) in the x-ray medical imaging field have been actively investigated. Unlike conventional x-ray energy integration detectors, PCDs count the number of incident x-ray photons within certain energy windows. For PCDs, the interactions between x-ray photons and photoconductor generate electronic voltage pulse signals. The pulse height of each signal is proportional to the energy of the incident photons. By comparing the pulse height with the preset energy threshold values, x-ray photons with specific energies are recorded and sorted into different energy bins...
October 26, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29046551/population-extinctions-can-increase-metapopulation-persistence
#17
Jeremy W Fox, David Vasseur, Morgan Cotroneo, Lilian Guan, Franz Simon
Metapopulations persist when local populations are rapidly recolonized following local extinctions. Such persistence requires asynchrony; simultaneous crashes of all populations would leave no source of recolonization. We show theoretically and experimentally that catastrophic population extinctions themselves can promote metapopulation persistence, by preventing spatial synchrony and thus enhancing recolonization. We refer to this behaviour as the 'spatial hydra effect': as with the mythical hydra that grows two new heads when one is removed, extinctions can increase recolonization...
September 2017: Nature Ecology & Evolution
https://www.readbyqxmd.com/read/29024273/the-first-brain-species-comparisons-and-evolutionary-implications-for-the-enteric-and-central-nervous-systems
#18
REVIEW
J B Furness, M J Stebbing
BACKGROUND: The enteric nervous system (ENS) and the central nervous system (CNS) of mammals both contain integrative neural circuitry and similarities between them have led to the ENS being described as the brain in the gut. PURPOSE: To explore relationships between the ENS and CNS across the animal kingdom. We found that an ENS occurs in all animals investigated, including hydra, echinoderms and hemichordates that do not have a CNS. The general form of the ENS, which consists of plexuses of neurons intrinsic to the gut wall and an innervation that controls muscle movements, is similar in species as varied and as far apart as hydra, sea cucumbers, annelid worms, octopus and humans...
October 11, 2017: Neurogastroenterology and Motility: the Official Journal of the European Gastrointestinal Motility Society
https://www.readbyqxmd.com/read/28988849/oxygen-metabolism-and-regeneration-lessons-from-mice
#19
REVIEW
Ellen Heber-Katz
The discovery that the Murphy Roths Large (MRL) mouse strain is a fully competent, epimorphic tissue regenerator, proved that the machinery of regeneration was preserved through evolution from hydra, to salamanders, to mammals. Such concepts have allowed translation of the biology of amphibians, and their ability to regenerate, to a mammalian context. We identified the ancient hypoxia-inducible factor (HIF)-1α pathway, operating through prolyl hydroxylase domain proteins (PHDs), as a central player in mouse regeneration...
November 2017: Trends in Molecular Medicine
https://www.readbyqxmd.com/read/28971724/multiplexed-nanomedicine-for-brain-tumors-nanosized-hercules-to-tame-our-lernaean-hydra-inside
#20
Wojciech K Panek, Omar F Khan, Dou Yu, Maciej S Lesniak
No abstract text is available yet for this article.
October 3, 2017: Nanomedicine
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