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https://www.readbyqxmd.com/read/29734636/a-novel-approach-to-assessing-environmental-disturbance-based-on-habitat-selection-by-zebra-fish-as-a-model-organism
#1
Cristiano V M Araújo, Daniel M Griffith, Victoria Vera-Vera, Paul Vargas Jentzsch, Laura Cervera, Beatriz Nieto-Ariza, David Salvatierra, Santiago Erazo, Rusbel Jaramillo, Luis A Ramos, Matilde Moreira-Santos, Rui Ribeiro
Aquatic ecotoxicity assays used to assess ecological risk assume that organisms living in a contaminated habitat are forcedly exposed to the contamination. This assumption neglects the ability of organisms to detect and avoid contamination by moving towards less disturbed habitats, as long as connectivity exists. In fluvial systems, many environmental parameters vary spatially and thus condition organisms' habitat selection. We assessed the preference of zebra fish (Danio rerio) when exposed to water samples from two western Ecuadorian rivers with apparently distinct disturbance levels: Pescadillo River (highly disturbed) and Oro River (moderately disturbed)...
April 1, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29651289/development-and-characterization-of-an-endotoxemia-model-in-zebra-fish
#2
Alan Y Hsu, Theodore Gurol, Tiago J P Sobreira, Sheng Zhang, Natalie Moore, Chufan Cai, Zhong-Yin Zhang, Qing Deng
Endotoxemia is a condition in which endotoxins enter the blood stream and cause systemic and sometimes lethal inflammation. Zebra fish provides a genetically tractable model organism for studying innate immunity, with additional advantages in live imaging and drug discovery. However, a bona fide endotoxemia model has not been established in zebra fish. Here, we have developed an acute endotoxemia model in zebra fish by injecting a single dose of LPS directly into the circulation. Hallmarks of human acute endotoxemia, including systemic inflammation, extensive tissue damage, circulation blockade, immune cell mobilization, and emergency hematopoiesis, were recapitulated in this model...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29651194/river-networks-as-ecological-corridors-a-coherent-ecohydrological-perspective
#3
Andrea Rinaldo, Marino Gatto, Ignacio Rodriguez-Iturbe
This paper draws together several lines of argument to suggest that an ecohydrological framework, i.e. laboratory, field and theoretical approaches focused on hydrologic controls on biota, has contributed substantially to our understanding of the function of river networks as ecological corridors. Such function proves relevant to: the spatial ecology of species; population dynamics and biological invasions; the spread of waterborne disease. As examples, we describe metacommunity predictions of fish diversity patterns in the Mississippi-Missouri basin, geomorphic controls imposed by the fluvial landscape on elevational gradients of species' richness, the zebra mussel invasion of the same Mississippi-Missouri river system, and the spread of proliferative kidney disease in salmonid fish...
February 2018: Advances in Water Resources
https://www.readbyqxmd.com/read/29626990/evaluation-of-antifungal-metabolites-activity-from-bacillus-licheniformis-oe-04-against-colletotrichum-gossypii
#4
Hafiz Husnain Nawaz, M J Nelly Rajaofera, Qiguang He, Usmani Anam, Chunhua Lin, Weiguo Miao
Anthracnose disease in the cotton plant caused by fungal pathogen Colletotrichum gossypii. It is supposed to be most critical diseases in the cotton crop as it causes infection and leads to complete damaging of the cotton crop by infecting the leaves, stems, and bolls in the field. The disease control is challenging due to the absence of an effective fungicide without damaging the farmer health and environment. So the series of experiments were designed to assess the antagonistic activity of biosurfactant released by strain Bacillus licheniformis OE-04 against the anthracnose causing agent in cotton and this strain was screened out from forty eight strain of rhizobacteria...
April 2018: Pesticide Biochemistry and Physiology
https://www.readbyqxmd.com/read/29619196/dual-targeting-of-the-cancer-antioxidant-network-with-1-4-naphthoquinone-fused-gold-i-n-heterocyclic-carbene-complexes
#5
R McCall, M Miles, P Lascuna, B Burney, Z Patel, K J Sidoran, V Sittaramane, J Kocerha, D A Grossie, J L Sessler, K Arumugam, J F Arambula
To achieve a systems-based approach to targeting the antioxidant pathway, 1,4-naphthoquinone annulated N-heterocyclic carbene (NHC) [bis(1,3-dimesityl-4,5-naphthoquino-imidazol-2-ylidene)-gold(i)] [silver(i) dichloride] ( 1 ), [bis(1,3-dimesityl-4,5-naphthoquino-imidazol-2-ylidene)-gold(i)] chloride ( 2 ), and 1,3-dimesityl-4,5-naphthoquino-imidazol-2-ylidene)-gold(i) chloride ( 3 )) were designed, synthesized, and tested for biological activity in a series of human cancer cell lines. The solution phase of complexes 1-3 were assigned using several spectroscopy techniques, including NMR spectroscopic analysis...
September 1, 2017: Chemical Science
https://www.readbyqxmd.com/read/29582431/retinal-histogenesis-in-an-altricial-avian-species-the-zebra-finch-taeniopygia-guttata-vieillot-1817
#6
Guadalupe Álvarez-Hernán, Elena Sánchez-Resino, Ismael Hernández-Núñez, Alfonso Marzal, Joaquín Rodríguez-León, Gervasio Martín-Partido, Javier Francisco-Morcillo
Comparative developmental studies have shown that the retina of altricial fish and mammals is incompletely developed at birth, and that, during the first days of life, maturation proceeds rapidly. In contrast, precocial fish and mammals are born with fully differentiated retinas. Concerning birds, knowledge about retinal development is generally restricted to a single order of precocial birds, Galliformes, due to the fact that both the chicken and the Japanese quail are considered model systems. However, comparison of embryonic pre-hatchling retinal development between altricial and precocial birds has been poorly explored...
March 26, 2018: Journal of Anatomy
https://www.readbyqxmd.com/read/29538323/synthesis-and-characterization-of-stimuli-responsive-poly-2-dimethylamino-ethylmethacrylate-grafted-chitosan-microcapsule-for-controlled-pyraclostrobin-release
#7
Chunli Xu, Lidong Cao, Pengyue Zhao, Zhaolu Zhou, Chong Cao, Feng Zhu, Fengmin Li, Qiliang Huang
Controllable pesticide release in response to environmental stimuli is highly desirable for better efficacy and fewer adverse effects. Combining the merits of natural and synthetic polymers, pH and temperature dual-responsive chitosan copolymer (CS- g -PDMAEMA) was facilely prepared through free radical graft copolymerization with 2-(dimethylamino) ethyl 2-methacrylate (DMAEMA) as the vinyl monomer. An emulsion chemical cross-linking method was used to expediently fabricate pyraclostrobin microcapsules in situ entrapping the pesticide...
March 14, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29427468/proteomic-analysis-of-ametryn-toxicity-in-zebrafish-embryos
#8
Heng-Dao Lin, Li-Sung Hsu, Chih-Ching Chien, Ssu-Ching Chen
Ametrym (AMT) is the most widely used herbicide and frequently detected in the aquatic environment. AMT also represent a potential health risk to aquatic organisms and animals, including humans. However, little data are available on their toxicity to zebrafish (Danio rerio). The aim of the present study was to evaluate the toxicological effects of AMT exposure on zebrafish embryos. In the acute toxicity test, 6 hpf embryos were exposed to various concentrations of AMT for 24 or 48 h. The results indicated that AMT induced malformation in larvae...
May 2018: Environmental Toxicology
https://www.readbyqxmd.com/read/29407944/alkylated-resveratrol-prodrugs-and-metabolites-as-potential-therapeutics-for-neurodegenerative-diseases
#9
Pablo Peñalver, Efres Belmonte-Reche, Norma Adán, Marta Caro, María Luisa Mateos-Martín, Mario Delgado, Elena González-Rey, Juan Carlos Morales
Resveratrol is a naturally occurring stilbene which has shown promising results as treatment for several neurodegenerative diseases. However, its application is limited due to its low efficacy and bioavailability. Here, we have designed and synthesized alkylated resveratrol prodrugs combining structural modification to improve antioxidant and anti-inflammatory properties and the preparation of prodrugs to extend drug bioavailability. For comparison we also studied resveratrol prodrugs and alkylated resveratrol derivatives...
February 25, 2018: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29368592/genome-wide-protein-phylogenies-for-four-african-cichlid-species
#10
Ajay Ramakrishnan Varadarajan, Rohini Mopuri, J Todd Streelman, Patrick T McGrath
BACKGROUND: The thousands of species of closely related cichlid fishes in the great lakes of East Africa are a powerful model for understanding speciation and the genetic basis of trait variation. Recently, the genomes of five species of African cichlids representing five distinct lineages were sequenced and used to predict protein products at a genome-wide level. Here we characterize the evolutionary relationship of each cichlid protein to previously sequenced animal species. RESULTS: We used the Treefam database, a set of preexisting protein phylogenies built using 109 previously sequenced genomes, to identify Treefam families for each protein annotated from four cichlid species: Metriaclima zebra, Astatotilapia burtoni, Pundamilia nyererei and Neolamporologus brichardi...
January 8, 2018: BMC Evolutionary Biology
https://www.readbyqxmd.com/read/29339327/the-chaperonin-cct-promotes-the-formation-of-fibrillar-aggregates-of-%C3%AE-tubulin
#11
Luis Pouchucq, Pablo Lobos-Ruiz, Gissela Araya, José María Valpuesta, Octavio Monasterio
The type II chaperonin CCT is involved in the prevention of the pathogenesis of numerous human misfolding disorders, as it sequesters misfolded proteins, blocks their aggregation and helps them to achieve their native state. In addition, it has been reported that CCT can prevent the toxicity of non-client amyloidogenic proteins by the induction of non-toxic aggregates, leading to new insight in chaperonin function as an aggregate remodeling factor. Here we add experimental evidence to this alternative mechanism by which CCT actively promotes the formation of conformationally different aggregates of γ-tubulin, a non-amyloidogenic CCT client protein, which are mediated by specific CCT-γ-tubulin interactions...
April 2018: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29322466/using-rt-qpcr-for-quantifying-mycobacteria-marinum-from-in-vitro-and-in-vivo-samples
#12
Han Xaio, Stephen H Gillespie
Mycobacterium marinum, the causative agent of fish tuberculosis, is rarely a human pathogen causing a chronic skin infection. It is now wildely used as a model system in animal models, especially in zebra fish model, to study the pathology of tuberculosis and as a means of screening new anti-tuberculosis agent. To facilitate such research, quantifying the viable count of M. marinum bacteria is a crucial step. The main approach used currently is still by counting the number of colony forming units (cfu), a method that has been in place for almost 100 years...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29152025/advances-in-microfluidic-devices-made-from-thermoplastics-used-in-cell-biology-and-analyses
#13
REVIEW
Elif Gencturk, Senol Mutlu, Kutlu O Ulgen
Silicon and glass were the main fabrication materials of microfluidic devices, however, plastics are on the rise in the past few years. Thermoplastic materials have recently been used to fabricate microfluidic platforms to perform experiments on cellular studies or environmental monitoring, with low cost disposable devices. This review describes the present state of the development and applications of microfluidic systems used in cell biology and analyses since the year 2000. Cultivation, separation/isolation, detection and analysis, and reaction studies are extensively discussed, considering only microorganisms (bacteria, yeast, fungi, zebra fish, etc...
September 2017: Biomicrofluidics
https://www.readbyqxmd.com/read/29127928/native-hypersaline-sulphate-reducing-bacteria-contributes-to-iron-nanoparticle-formation-in-saltpan-sediment-a-concern-for-aquaculture
#14
Kirti Ranjan Das, Meenal Kowshik, M K Praveen Kumar, Savita Kerkar, S K Shyama, Samir Mishra
A hypersaline dissimilatory sulphate reducing bacterium, strain LS4, isolated from the sediments of Ribander saltpan, Goa, India was found to produce (Fe2 O3 ) maghemite nanoparticles. The presence of maghemite nanoparticles was also detected in the same sediment. Strain LS4 was isolated anaerobically on modified Hatchikian's media at 300 psu, growing optimally at 30 °C, 150 psu salinity and pH 7.8. Based on biochemical characteristics and 16S rRNA sequence analysis, the strain LS4 belongs to genus Desulfovibrio...
January 15, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29126392/mir-17-5p-suppresses-cell-proliferation-and-invasion-by-targeting-etv1-in-triple-negative-breast-cancer
#15
Jie Li, Yuanhui Lai, Jieyi Ma, Yue Liu, Jiong Bi, Longjuan Zhang, Lianzhou Chen, Chen Yao, Weiming Lv, Guangqi Chang, Shenming Wang, Mao Ouyang, Wenjian Wang
BACKGROUND: Triple-negative breast cancer (TNBC) is the malignancy with the worst outcome among all breast cancer subtypes. We reported that ETV1 is a significant oncogene in TNBC tumourigenesis. Consequently, investigating the critical regulatory microRNAs (miRNAs) of ETV1 may be beneficial for TNBC targeted therapy. METHODS: We performed in situ hybridization (ISH) and immunohistochemistry (IHC) to detect the location of miR-17-5p and ETV1 in TNBC patient samples, respectively...
November 10, 2017: BMC Cancer
https://www.readbyqxmd.com/read/29122587/the-splicing-code
#16
REVIEW
Marco Baralle, Francisco Ernesto Baralle
This issue dedicated to the code of life tackles very challenging and open questions in Biology. The genetic code, brilliantly uncovered over 50 years ago is an example of a univocal biological code. In fact, except for very few and marginal variations, it is the same from bacteria to man, the RNA stretch: 5' GUGUUC 3' reads as the dipeptide: Val-Phe in bacteria, in yeast, in Arabidopsis, in zebra fish, in mouse and in human. A degree of ambiguity is possible if mutations are introduced in the tRNAs in a way that the anticodon reads one amino acid but the aminoacyl-transferase attaches a different one onto the tRNA...
February 2018: Bio Systems
https://www.readbyqxmd.com/read/29044046/locally-extensive-meningoencephalitis-caused-by-miamiensis-avidus-syn-philasterides-dicentrarchi-in-a-zebra-shark
#17
Wen-Ta Li, Chieh Lo, Chen-Yi Su, Hsuan Kuo, Susanne Je-Han Lin, Hui-Wei Chang, Victor Fei Pang, Chian-Ren Jeng
Scuticociliatosis, caused by ciliated protozoa in the subclass Scuticociliatia of the phylum Ciliophora, can cause fatal disease in teleost fish species. However, information on scuticociliatosis in elasmobranchs is still scarce. In this report, we describe a case of locally extensive meningoencephalitis caused by Miamiensis avidus (syn. Philasterides dicentrarchi) in a 2 yr old captive zebra shark Stegostoma fasciatum. Granulocytic meningoencephalitis was observed through histological assessment. Inflammation was confined to the ventral aspect of the brain with a large number of ciliated protozoa, transforming into non-suppurative meningitis in the lateral aspect, and gradually vanished in the dorsal aspect...
October 18, 2017: Diseases of Aquatic Organisms
https://www.readbyqxmd.com/read/29028984/a-bayesian-framework-for-the-inference-of-gene-regulatory-networks-from-time-and-pseudo-time-series-data
#18
M Sanchez-Castillo, D Blanco, I M Tienda-Luna, M C Carrion, Yufei Huang
Motivation: Molecular profiling techniques have evolved to single-cell assays, where dense molecular profiles are screened simultaneously for each cell in a population. High-throughput single-cell experiments from a heterogeneous population of cells can be experimentally and computationally sorted as a sequence of samples pseudo-temporally ordered samples. The analysis of these datasets, comprising a large number of samples, has the potential to uncover the dynamics of the underlying regulatory programmes...
March 15, 2018: Bioinformatics
https://www.readbyqxmd.com/read/28930614/inter-species-functional-interactome-of-nuclear-steroid-receptors-r1
#19
Styliani A Geronikolou, Athanasia Pavlopoulou, Christina Kanaka-Gantenbein, George Chrousos
Steroids exert their actions by binding to the glucocorticoid, mineralocorticoid, androgen, estrogen and progesterone classes of receptors. Despite an exponential increase in our knowledge of steroid receptors, their interactions with other molecules, subcellular location and functions still need further elucidation. To unravel the mechanism(s) of action of the steroid hormones, as well as the function of their cognate nuclear receptors, an interaction network was created (henceforth referred to as "R1 Interactome")- illustrating that robust interactions have been preserved in rodents, frog, zebra fish and drosophila...
January 1, 2018: Frontiers in Bioscience (Elite Edition)
https://www.readbyqxmd.com/read/28913548/changes-in-histopathology-enzyme-activities-and-the-expression-of-relevant-genes-in-zebrafish-danio-rerio-following-long-term-exposure-to-environmental-levels-of-thallium
#20
Li-Ping Hou, Yang Yang, Hu Shu, Guang-Guo Ying, Jian-Liang Zhao, Yi-Bing Chen, Yong-Heng Chen, Gui-Zhen Fang, Xin Li, Ji-Sheng Liu
Thallium is a rare-earth element, but widely distributed in water environments, posing a potential risk to our health. This study was designed to investigate the chronic effects of thallium based on physiological responses, gene expression, and changes in the activity of relevant enzymes in adult zebra fish exposed to thallium at low doses. The endpoints assessed include mRNA expression of metallothionein (MT)2 and heat shock protein HSP70; enzymatic activities of superoxide dismutase (SOD) and Na+ /K+ -ATPase; and the histopathology of gill, gonad, and liver tissues...
November 2017: Bulletin of Environmental Contamination and Toxicology
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