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https://www.readbyqxmd.com/read/27936201/sterol-o-acyltransferase-2-contributes-to-the-yolk-cholesterol-trafficking-during-zebrafish-embryogenesis
#1
Nai-Yun Chang, Yen-Ju Chan, Shih-Torng Ding, Yen-Hua Lee, Wei-Chun HuangFu, I-Hsuan Liu
To elucidate whether Sterol O-acyltransferase (Soat) mediates the absorption and transportation of yolk lipids to the developing embryo, zebrafish soat1 and soat2 were cloned and studied. In the adult zebrafish, soat1 was detected ubiquitously while soat2 mRNA was detected specifically in the liver, intestine, brain and testis. Whole mount in situ hybridization demonstrated that both soat1 and soat2 expressed in the yolk syncytial layer, hatching gland and developing cardiovascular as well as digestive systems, suggesting that Soats may play important roles in the lipid trafficking and utilization during embryonic development...
2016: PloS One
https://www.readbyqxmd.com/read/27934721/galaxy-formation-through-cosmic-recycling
#2
Nina Hatch
No abstract text is available yet for this article.
December 2, 2016: Science
https://www.readbyqxmd.com/read/27933254/characterization-of-a-novel-hatching-enzyme-purified-from-starfish-asterina-pectinifera
#3
Ji Hoon Choi, Sang Moo Kim
Hatching enzyme is a protease which can degrade the membrane of egg. In this study, a hatching enzyme was purified from starfish (Asterina pectinifera) with 6.34 fold of purification rate, 5.04 % of yield, and 73.87 U/mg of specific activity. The molecular weight of starfish hatching enzyme was 86 kDa, which was reduced to 62 kDa after removal of N-linked oligosaccharides. The optimal pH and temperature of the hatching enzyme activity were pH 7.0 and 40 °C, respectively, while those of stability were pH 8 and 20 °C...
2016: SpringerPlus
https://www.readbyqxmd.com/read/27932040/embryonic-exposure-to-model-naphthenic-acids-delays-growth-and-hatching-in-the-pond-snail-lymnaea-stagnalis
#4
Christina U Johnston, Lindsay N Clothier, Dean M Quesnel, Lisa M Gieg, Gordon Chua, Petra M Hermann, Willem C Wildering
Naphthenic acids (NAs), a class of structurally diverse carboxylic acids with often complex ring structures and large aliphatic tail groups, are important by-products of many petrochemical processes including the oil sands mining activity of Northern Alberta. While it is evident that NAs have both acute and chronic harmful effects on many organisms, many aspects of their toxicity remain to be clarified. Particularly, while substantive data sets have been collected on NA toxicity in aquatic prokaryote and vertebrate model systems, to date, nothing is known about the toxic effects of these compounds on the embryonic development of aquatic invertebrate taxa, including freshwater mollusks...
December 5, 2016: Chemosphere
https://www.readbyqxmd.com/read/27928001/the-male-handicap-male-biased-mortality-explains-skewed-sex-ratios-in-brown-trout-embryos
#5
P Morán, L Labbé, C Garcia de Leaniz
Juvenile sex ratios are often assumed to be equal for many species with genetic sex determination, but this has rarely been tested in fish embryos due to their small size and absence of sex-specific markers. We artificially crossed three populations of brown trout and used a recently developed genetic marker for sexing the offspring of both pure and hybrid crosses. Sex ratios (SR = proportion of males) varied widely one month after hatching ranging from 0.15 to 0.90 (mean = 0.39 ± 0.03). Families with high survival tended to produce balanced or male-biased sex ratios, but SR was significantly female-biased when survival was low, suggesting that males sustain higher mortality during development...
December 2016: Biology Letters
https://www.readbyqxmd.com/read/27925269/lifecycle-exposure-of-fathead-minnows-to-environmentally-relevant-concentrations-of-the-%C3%AE-blocker-drug-propranolol
#6
Joanne L Parrott, Vimal K Balakrishnan
Propranolol is a human pharmaceutical β-blocker that has been detected in municipal wastewater effluents at ng/L to low µg/L. To assess the potential of this compound to affect fish, fathead minnow (Pimephales promelas) were exposed for a lifecycle in a flow-through system to nominal propranolol concentrations of 0.87, 8.7, 87, 870 and 8,700 ng/L. Measured propranolol concentrations were below detection for the two lowest exposure concentrations, and were 76, 580, and 7,800 ng/L for the three highest exposure concentrations...
December 7, 2016: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/27925067/piper-aduncum-against-haemonchus-contortus-isolates-cross-resistance-and-the-research-of-natural-bioactive-compounds
#7
Yousmel Alemán Gaínza, Rafaela Regina Fantatto, Francisco Celio Maia Chaves, Humberto Ribeiro Bizzo, Sérgio Novita Esteves, Ana Carolina de Souza Chagas
The anthelminthic activity of the essential oil (EO) of Piper aduncum L. was tested in vitro on eggs and larvae of resistant (Embrapa2010) and susceptible (McMaster) isolates of Haemonchus contortus. The EO was obtained by steam distillation and its components identified by chromatography. EO concentrations of 12.5 to 0.02 mg/mL were used in the egg hatch test (EHT) and concentrations of 3.12 to 0.01 mg/mL in the larval development test (LDT). Inhibition concentrations (IC) were determined by the SAS Probit procedure, and significant differences assessed by ANOVA followed by Tukey's test...
December 1, 2016: Revista Brasileira de Parasitologia Veterinária, Brazilian Journal of Veterinary Parasitology
https://www.readbyqxmd.com/read/27923182/sociodemographic-lifestyle-and-psychosocial-determinants-of-hair-cortisol-in-a-south-london-community-sample
#8
Susanne Fischer, Roman Duncko, Stephani L Hatch, Andrew Papadopoulos, Laura Goodwin, Souci Frissa, Matthew Hotopf, Anthony J Cleare
OBJECTIVE: Hypothalamic-pituitary-adrenal (HPA) measures are crucial for research into stress and stress-related disorders. Most HPA measures fluctuate depending on diurnal rhythms and state confounders. Hair cortisol concentrations (HCC) are less susceptible to such fluctuations, but less is known about trait-like confounders. Using a community sample, we tested the relationship between HCC and a range of variables including demographic variables, hair treatment, and medication, as well as psychosocial variables, namely childhood trauma, critical life events, and depressive symptoms...
November 17, 2016: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/27921089/effect-of-l-carnitine-on-in-vitro-developmental-rate-the-zona-pellucida-and-hatching-of-blastocysts-and-their-cell-numbers-in-mouse-embryos
#9
Nasrin Khanmohammadi, Mansoureh Movahedin, Manouchehr Safari, Hamid Reza Sameni, Behpour Yousefi, Behnaz Jafari, Sam Zarbakhsh
: L-carnitine (LC) is an antioxidant with the ability to promote the growth in vitro embryo. OBJECTIVE: The goal was to evaluate the effect of LC on some indicators of embryo development and blastocyst quality including zona pellucid (ZP) thickness, the hatching of blastocysts and their cell numbers. MATERIALS AND METHODS: Mouse embryos were randomly divided into five groups and incubated with different concentrations of LC (I; 0, II; 0.5, III; 1, IV; 2 and V; 4 mg/ml) from 2-cell to hatched blastocyst...
October 2016: International Journal of Reproductive Biomedicine (Yazd, Iran)
https://www.readbyqxmd.com/read/27920949/development-of-olfactory-epithelium-and-associated-structures-in-the-green-iguana-iguana-iguana-light-and-scanning-electron-microscopic-study
#10
Olga Sapoznikov, Petr Cizek, Frantisek Tichy
The ontogenesis of the nasal cavity has been described in many mammalian species. The situation is different with reptiles, despite the fact that they have become relatively common as pets. In this study we focused on the ontogenesis of the olfactory epithelium, as well as other types of epithelia in the nasal cavity of pre-hatched green iguanas (Iguana iguana). Collection of samples began from day 67 of incubation and continued every four days until hatching. Microscopic examination revealed that significant morphological changes in the nasal cavity began approximately at day 91 of ontogenesis...
2016: PeerJ
https://www.readbyqxmd.com/read/27920797/genome-wide-association-study-for-identifying-loci-that-affect-fillet-yield-carcass-and-body-weight-traits-in-rainbow-trout-oncorhynchus-mykiss
#11
Dianelys Gonzalez-Pena, Guangtu Gao, Matthew Baranski, Thomas Moen, Beth M Cleveland, P Brett Kenney, Roger L Vallejo, Yniv Palti, Timothy D Leeds
Fillet yield (FY, %) is an economically-important trait in rainbow trout aquaculture that affects production efficiency. Despite that, FY has received little attention in breeding programs because it is difficult to measure on a large number of fish and cannot be directly measured on breeding candidates. The recent development of a high-density SNP array for rainbow trout has provided the needed tool for studying the underlying genetic architecture of this trait. A genome-wide association study (GWAS) was conducted for FY, body weight at 10 (BW10) and 13 (BW13) months post-hatching, head-off carcass weight (CAR), and fillet weight (FW) in a pedigreed rainbow trout population selectively bred for improved growth performance...
2016: Frontiers in Genetics
https://www.readbyqxmd.com/read/27920198/effects-of-breeder-age-strain-and-eggshell-temperature-on-nutrient-metabolism-of-broiler-embryos
#12
A Nangsuay, R Meijerhof, I van den Anker, M J W Heetkamp, B Kemp, H van den Brand
Breeder age and broiler strain influence the availability of nutrients and oxygen through yolk size and eggshell conductance, and the effects of these egg characteristics on nutrient metabolism might be influenced by eggshell temperature (EST). This study aims to determine effects of breeder age, strain, and EST on nutrient metabolism of embryos. A study was designed as a 2 × 2 × 2 factorial arrangement using four batches of in total 4,464 hatching eggs of 2 flock ages at 29 to 30 wk (young) and 54 to 55 wk (old) of Ross 308 and Cobb 500...
December 5, 2016: Poultry Science
https://www.readbyqxmd.com/read/27920196/regulation-of-turkey-myogenic-satellite-cell-migration-by-micrornas-mir-128-and-mir-24
#13
S G Velleman, R L Harding
Myogenic satellite cells are an adult stem cell responsible for all post-hatch muscle growth in poultry. As a stem cell population, satellite cells are highly heterogeneous, but the origin of this heterogeneity remains unclear. Heterogeneity is, in part, regulated by gene expression. One method of endogenous gene regulation that may contribute to heterogeneity is microRNAs (miRNAs). Two miRNAs previously shown to regulate poultry myogenic satellite cell proliferation and differentiation, miR-128 and miR-24, were studied to determine if they also affected satellite cell migration...
December 5, 2016: Poultry Science
https://www.readbyqxmd.com/read/27920191/effect-of-in-ovo-injection-of-raffinose-on-growth-performance-and-gut-health-parameters-of-broiler-chicken
#14
J D Berrocoso, R Kida, A K Singh, Y S Kim, R Jha
The effects of in ovo injection of raffinose (RFO) as a prebiotic on growth performance, relative weight of proventriculus, gizzard, drumstick and breast muscles, and ileum mucosa morphology were examined in Cobb 500 broilers. A total of 240 fertilized eggs were divided into 4 groups: a non-injected with intact shell and 3 levels of RFO solution (1.5, 3.0, and 4.5 mg in 0.2 mL of an aqueous diluents). The RFO solution was injected into the air sac on d 12 of incubation. In total 144 birds were fed a standard diet and management and sacrificed at d 21 post hatch for collection of samples...
December 5, 2016: Poultry Science
https://www.readbyqxmd.com/read/27920190/evaluation-of-chlorine-dioxide-based-product-as-a-hatchery-sanitizer
#15
P Maharjan, S Cox, U Gadde, F D Clark, K Bramwell, S E Watkins
Formaldehyde is commonly used to overcome contaminants introduced by hatching eggs or water supply in the hatcher cabinets. However, health risks associated with its use make economical alternatives important. This project evaluated a chlorine dioxide based product (CDBP) (0.3% concentrate) as a hatchery sanitizer in decontaminating microbial populations on the shell surface of hatching eggs (>18 d old), as well as its impact on hatchability and chick performance. Hatchers (0.20 m(2)) designed to hold approximately 50 eggs and equipped with circulation fans, heaters, and thermostats were used for the evaluation...
December 5, 2016: Poultry Science
https://www.readbyqxmd.com/read/27919701/evaluation-of-the-neurotoxic-effects-of-chronic-embryonic-exposure-with-inorganic-mercury-on-motor-and-anxiety-like-responses-in-zebrafish-danio-rerio-larvae
#16
Noraini Abu Bakar, Nurul Syafida Asma' Mohd Sata, Nurul Farhana Ramlan, Wan Norhamidah Wan Ibrahim, Syaizwan Zahmir Zulkifli, Che Azurahanim Che Abdullah, Mohammad Noor Amal Azmai
Chronic exposure to mercury (Hg) can lead to cumulative impairments in motor and cognitive functions including alteration in anxiety responses. Although several risk factors have been identified in recent year, little is known about the environmental factors that either due exposure toward low level of inorganic mercury that may led to the developmental disorders. The present study investigated the effects of embryonic exposure of mercury chloride on motor function and anxiety-like behavior. The embryo exposed to 6 different concentrations of HgCl2 (7...
December 2, 2016: Neurotoxicology and Teratology
https://www.readbyqxmd.com/read/27918418/insecticide-effect-of-zeolites-on-the-tomato-leafminer-tuta-absoluta-lepidoptera-gelechiidae
#17
Caroline De Smedt, Veerle Van Damme, Patrick De Clercq, Pieter Spanoghe
(1) Background: The tomato leafminer Tuta absoluta (Lepidoptera: Gelechiidae) is a key tomato insect pest. At present, it is considered to be a serious threat in various countries in Europe, North Africa, and Middle East. The extensive use and the developed resistance of T. absoluta to spinosad causes some concern, which leads to the need for alternative products. (2) Materials and Methods: Several laboratory experiments were conducted to investigate the ovicidal properties of a zeolite particle film on T. absoluta...
December 2, 2016: Insects
https://www.readbyqxmd.com/read/27918367/intracranial-complications-from-temporal-bone-cystic-angiomatosis
#18
Michael J Bauschard, Jonathan L Hatch, Luis Enrique R Liogier-Weyback, W Alexander Vandergrift, Theodore R McRackan
No abstract text is available yet for this article.
December 1, 2016: Otology & Neurotology
https://www.readbyqxmd.com/read/27917321/effects-of-arachidonic-acid-supplementation-in-maturation-diet-on-female-reproductive-performance-and-larval-quality-of-giant-river-prawn-macrobrachium-rosenbergii
#19
Chanpim Kangpanich, Jarunan Pratoomyot, Nisa Siranonthana, Wansuk Senanan
The giant river prawn (Macrobrachium rosenbergii) is one of the most farmed freshwater crustaceans in the world. Its global production has been stalling in the past decade due to the inconsistent quality of broodstock and hatchery-produced seeds. A better understanding of the role of nutrition in maturation diets will help overcome some of the production challenges. Arachidonic acid (20:4 n-6, ARA) is a fatty acid precursor of signaling molecules important for crustacean reproduction, prostaglandins E and F of the series II (PGE2 and PGF2α), and is often lacking in maturation diets of shrimp and prawns...
2016: PeerJ
https://www.readbyqxmd.com/read/27915140/two-zinc-aminoclays-in-vitro-cytotoxicity-assessment-in-hela-cells-and-in-vivo-embryotoxicity-assay-in-zebrafish
#20
Hang-Suk Chun, Duckshin Park, Song Eun Lim, Kwang-Hun Jeong, Ji-Seon Park, Han-Jin Park, Shinyoung Kang, Kyoung Suk Kang, Hyun Gyu Park, Ha-Rim An, Yun Suk Huh, Young-Chul Lee
Two zinc-aminoclays [ZnACs] with functionalized primary amines [(-CH2)3NH2] were prepared by a simple sol-gel reaction using cationic metal precursors of ZnCl2 and Zn(NO3)2 with 3-aminopropyl triethoxysilane [APTES] under ambient conditions. Due to the facile interaction of heavy metals with primary amine sites and Zn-related intrinsic antimicrobial activity, toxicity assays of ZnACs nanoparticles (NPs) prior to their environmental and human-health applications are essential. However, such reports remain rare...
December 1, 2016: Ecotoxicology and Environmental Safety
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