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https://www.readbyqxmd.com/read/28550411/isolation-characterization-and-expression-of-proto-oncogene-cmyc-in-large-yellow-croaker-larimichthys-crocea
#1
Yonghua Jiang, Kunhuang Han, Shihai Chen, Yilei Wang, Ziping Zhang
cMyc is a vital transcription factor that involves in the regulation of cell proliferation, growth, differentiation, and apoptosis. In the present study, cMyc in Larimichthys crocea (Lc-cMyc) was cloned and analyzed for investigating its function. The full-length cDNA of Lc-cMyc was 2089 bp encoding a 440-amino-acid protein (Lc-cMyc). Lc-cMyc had the characteristic helix-loop-helix-leucine-zipper (HLH-LZ) DNA-binding domain and highly conservative in evolution. The expression of Lc-cMyc was detected by quantitative real-time PCR (qRT-PCR) and in situ hybridization, respectively...
May 27, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/28550373/black-carp-vasa-identifies-embryonic-and-gonadal-germ-cells
#2
Ting Xue, Miao Yu, Qihua Pan, Yizhou Wang, Jian Fang, Lingyu Li, Yu Deng, Kai Chen, Qian Wang, Tiansheng Chen
Identification of molecular markers is an essential step in the study of germ cells. Vasa is an RNA helicase and a well-known germ cell marker that plays a crucial role in germ cell development. Here, we identified the Vasa homolog termed Mpvasa as the first germ cell marker in black carp (Mylopharyngodon piceus). First, a 2819-bp full-length Mpvasa complementary DNA (cDNA) was cloned by PCR using degenerated primers of conserved sequences and gene-specific primers. The Mpvasa cDNA sequence encodes a 637-amino acid protein that contains eight conserved characteristic motifs of the DEAD box protein family, and shares high identity to grass carp (81%) and zebrafish (74%) vasa homologs...
May 26, 2017: Development Genes and Evolution
https://www.readbyqxmd.com/read/28548684/origins-of-anterior-posterior-polarity-by-localized-activation-of-disheveled
#3
Jeff Chieh-Fu Peng, Lingyu Wang, Athula H Wikramanayake
Most animal eggs have a primordial polarity, termed the animal-vegetal (AV) axis, that frequently predicts the anterior-posterior (AP) axis of the embryo and adult. Transformation of the AV polarity of the egg to the AP polarity of the embryo in many species is mediated by the localized activation of canonical Wnt (cWnt) signaling in vegetal blastomeres by maternal determinants. In the sea urchin egg, cWnt signal transduction is facilitated by localized "activation" of the Disheveled protein, a central regulator of Wnt signaling...
May 26, 2017: Molecular Reproduction and Development
https://www.readbyqxmd.com/read/28548038/marek-s-disease-virus-infection-of-phagocytes-a-de-novo-in-vitro-infection-model
#4
Pankaj Chakraborty, Lonneke Vervelde, Robert G Dalziel, Peter S Wasson, Venugopal Nair, Bernadette M Dutia, Pete Kaiser
Marek's disease virus (MDV) is an alphaherpesvirus that induces T-cell lymphomas in chickens. Natural infections in vivo are caused by the inhalation of infected poultry house dust and it is presumed that MDV infection is initiated in the macrophages from where the infection is passed to B cells and activated T cells. Virus can be detected in B and T cells and macrophages in vivo, and both B and T cells can be infected in vitro. However, attempts to infect macrophages in vitro have not been successful. The aim of this study was to develop a model for infecting phagocytes [macrophages and dendritic cells (DCs)] with MDV in vitro and to characterize the infected cells...
May 26, 2017: Journal of General Virology
https://www.readbyqxmd.com/read/28544900/kinetics-of-glucocorticoid-exposure-in-developing-zebrafish-a-tracer-study
#5
Peter Johannes Steenbergen, Nabila Bardine, Faiza Sharif
In the current study the dynamics of glucocorticoid uptake by zebrafish chorionated embryos from the surrounding medium were studied, using 2.5 μM cortisol or dexamethasone solutions complemented with their tritiated variant. We measured the uptake of radioactive cortisol by embryos during a 1 h submersion. Interestingly, the signal in chorionated embryos was 85% (exposure: 1-2 hpf) or 78% (exposure: 48-49 hpf) of the signal present in an equal volume medium. By comparing embryos measured without chorion, we found that 18-20% of the radioactivity present in chorionated embryos is actually bound to the chorion or located in the perivitelline space...
May 12, 2017: Chemosphere
https://www.readbyqxmd.com/read/28542562/identification-and-characteristics-of-extracellular-vesicles-from-bovine-blastocysts-produced-in-vitro
#6
Edwin A Mellisho, Alejandra E Velásquez, María J Nuñez, Joel G Cabezas, Juan A Cueto, Claudio Fader, Fidel O Castro, Lleretny Rodríguez-Álvarez
Extracellular vesicles (EVs) have been identified within different body fluids and cell culture media. However, there is very little information on the secretion of these vesicles during early embryonic development. The aims of this work were first to demonstrate the secretion of extracellular vesicles by pre-implantation bovine embryos and second to identify and characterize the population of EVs secreted by bovine blastocysts during the period from day seven to nine of embryo culture and its correlation with further embryo development up to day 11...
2017: PloS One
https://www.readbyqxmd.com/read/28542524/ectopically-expressed-slc34a2a-sense-antisense-transcripts-cause-a-cerebellar-phenotype-in-zebrafish-embryos-depending-on-rna-complementarity-and-dicer
#7
Monica J Piatek, Victoria Henderson, Amy Fearn, Bill Chaudhry, Andreas Werner
Natural antisense transcripts (NATs) are complementary to protein coding genes and potentially regulate their expression. Despite widespread occurrence of NATs in the genomes of higher eukaryotes, their biological role and mechanism of action is poorly understood. Zebrafish embryos offer a unique model system to study sense-antisense transcript interplay at whole organism level. Here, we investigate putative antisense transcript-mediated mechanisms by ectopically co-expressing the complementary transcripts during early zebrafish development...
2017: PloS One
https://www.readbyqxmd.com/read/28540574/diagnosis-and-management-of-heterotopic-pregnancy-following-embryo-transfer-clinical-analysis-of-55-cases-from-a-single-institution
#8
Jiangtao Lyu, Hong Ye, Weihua Wang, Yi Lin, Wenjie Sun, Li Lei, Lijuan Hao
OBJECTIVE: The aims of this study were to summarize the clinical features of patients with heterotopic pregnancy (HP) following embryo transfer (ET) and explore the risk factors for miscarriage after surgery. METHODS: All patients with HP following ET treated by surgery between August 2014 and August 2015 in Chongqing Health Center for Women and Children were retrospectively reviewed. RESULTS: Fifty-five patients were identified, including 40 with tubal HP, 9 interstitial HP and 6 cornual HP...
May 24, 2017: Archives of Gynecology and Obstetrics
https://www.readbyqxmd.com/read/28540311/impacts-of-anti-dsdna-antibody-on-in-vitro-fertilization-embryo-transfer-and-frozen-thawed-embryo-transfer
#9
Jiao Fan, Yiping Zhong, Cuina Chen
Our purpose is to explore whether anti-dsDNA antibody, which was demonstrated to enter living cells and induced apoptosis, could adversely affect reproductive outcomes. A total of 259 women receiving the in vitro fertilization-embryo transfer (IVF) cycle were enrolled in this study, including 52 women with positive ANA and anti-dsDNA (ANA+/anti-dsDNA+ group), 86 women with positive ANA and negative anti-dsDNA (ANA+/anti-dsDNA- group), and 121 women with negative ANA and anti-dsDNA (ANA-/anti-dsDNA- group). 136 nonpregnant women among 259 patients in the IVF-ET cycle were enrolled in the hormone replacement therapy frozen-thawed embryo transfer (HRT-TET) cycle...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/28538658/seed-coating-increases-seed-moisture-uptake-and-restricts-embryonic-oxygen-availability-in-germinating-cereal-seeds
#10
Linda Gorim, Folkard Asch
Seed coating is a technology to improve germination and homogenize stand establishment. Although coating often results in lower germination rates, seeds that do germinate grow more vigorously and show strongly reduced respiratory losses during reserve mobilization. We hypothesize that the higher mobilization efficiency is due to a shift in the enzymatic cleavage of sucrose from invertase to sucrose synthase in the embryonic tissue caused by a reduced oxygen availability induced by oversaturation with water caused by the coating during early germination...
May 24, 2017: Biology
https://www.readbyqxmd.com/read/28537496/feeder-free-derivation-of-na%C3%A3-ve-human-pluripotent-stem-cells
#11
Emily Ward, Kirk Twaroski, Jakub Tolar
Human pluripotent stem cells (HPSCs) cultured in conditions that maintain pluripotency via FGF and TGFβ signaling have been described as being in a primed state. These cells have been shown to exhibit characteristics more closely related to mouse epiblast-derived stem cells than to so called naïve mouse PSCs said to possess a more ground state pluripotency that mimics the early mouse embryo inner cell mass. Initial attempts to create culture conditions favorable for generation of naïve HPSCs from primed HPSCs has required the use of mouse embryonic fibroblasts as a feeder layer to support this transition...
May 24, 2017: Stem Cells and Development
https://www.readbyqxmd.com/read/28537237/-comparative-results-of-preimplantation-genetic-screening-by-array-comparative-genomic-hybridization-and-new-generation-sequencing
#12
N V Aleksandrova, E S Shubina, A N Ekimov, T A Kodyleva, I S Mukosey, N P Makarova, E V Kulakova, L A Levkov, I Yu Barkov, D Yu Trofimov, G T Sukhikh
Aneuploidies as quantitative chromosome abnormalities are a main cause of failed development of morphologically normal embryos, implantation failures, and early reproductive losses. Preimplantation genetic screening (PGS) allows a preselection of embryos with a normal karyotype, thus increasing the implantation rate and reducing the frequency of early pregnancy loss after IVF. Modern PGS technologies are based on a genome-wide analysis of the embryo. The first pilot study in Russia was performed to assess the possibility of using semiconductor new-generation sequencing (NGS) as a PGS method...
March 2017: Molekuliarnaia Biologiia
https://www.readbyqxmd.com/read/28536295/papers-of-note-in-science356-6339
#13
Annalisa M VanHook
This week's articles identify a repulsive guidance system that controls the recruitment of T cells to germinal centers; a mechanism for controlling the transfer of nutrients from the placenta to early mouse embryos; and the subcellular location of calcium dynamics in astrocytes.
May 23, 2017: Science Signaling
https://www.readbyqxmd.com/read/28536000/an-analysis-of-myod-dependent-transcription-using-crispr-cas9-gene-targeting-in-xenopus-tropicalis-embryos
#14
Caitlin McQueen, Mary Elizabeth Pownall
Myogenic regulatory factors (MRFs) are known to have essential roles in both the establishment and differentiation of the skeletal muscle cell lineage. MyoD is expressed early in the Xenopus mesoderm where it is present and active several hours before the activation of muscle differentiation genes. Previous studies in cultured cells and in Xenopus laevis have identified sets of genes that require MyoD prior to differentiation of skeletal muscle. Here we report results from experiments using CRISPR/Cas9 to target the MyoD gene in the diploid frog Xenopus tropicalis, that are analysed by RNA-seq at gastrula stages...
May 20, 2017: Mechanisms of Development
https://www.readbyqxmd.com/read/28534463/gene-expression-analysis-of-bovine-embryonic-disc-trophoblast-and-parietal-hypoblast-at-the-start-of-gastrulation
#15
Peter L Pfeffer, Craig S Smith, Paul Maclean, Debra K Berg
In cattle early gastrulation-stage embryos (Stage 5), four tissues can be discerned: (i) the top layer of the embryonic disc consisting of embryonic ectoderm (EmE); (ii) the bottom layer of the disc consisting of mesoderm, endoderm and visceral hypoblast (MEH); (iii) the trophoblast (TB); and (iv) the parietal hypoblast. We performed microsurgery followed by RNA-seq to analyse the transcriptome of these four tissues as well as a developmentally earlier pre-gastrulation embryonic disc. The cattle EmE transcriptome was similar at Stages 4 and 5, characterised by the OCT4/SOX2/NANOG pluripotency network...
May 23, 2017: Zygote: the Biology of Gametes and Early Embryos
https://www.readbyqxmd.com/read/28534051/cooling-strategies-for-brazilian-flounder-paralichthys-orbignyanus-embryos
#16
A S Varela, T F Cardoso, E Fernandes E Silva, K L Goularte, M H Okamoto, L A Sampaio, R D Jardim, C D Corcini
BACKGROUND: Paralichthys orbignyanus is the species of the greatest potential for marine and estuarine fish farming in southern Brazil. Consequently, embryo cryopreservation becomes an important tool for increasing their production. OBJECTIVE: To evaluate the effects of cooling protocols on the viability of embryos of P. orbignyanus at two stages of development (neurula and early differentiation of the tail). MATERIALS AND METHODS: Control embryos were maintained at 23 degree C and treated embryos were cooled to 15 degree C, 10 degree C and 5 degree C at rapid, moderate and slow cooling rates...
March 2017: Cryo Letters
https://www.readbyqxmd.com/read/28533980/mitochondrial-complex-i-deficiency-leads-to-the-retardation-of-early-embryonic-development-in-ndufs4-knockout-mice
#17
Mei Wang, Ya-Ping Huang, Han Wu, Ke Song, Cong Wan, A-Ni Chi, Ya-Mei Xiao, Xiao-Yang Zhao
BACKGROUND: The NDUFS4 gene encodes an 18-kD subunit of mitochondria complex I, and mutations in this gene lead to the development of a severe neurodegenerative disease called Leigh syndrome (LS) in humans. To investigate the disease phenotypes and molecular mechanisms of Leigh syndrome, the Ndufs4 knockout (KO) mouse has been widely used as a novel animal model. Because the homozygotes cannot survive beyond child-bearing age, whether Ndufs4 and mitochondrial complex I influence early embryonic development remains unknown...
2017: PeerJ
https://www.readbyqxmd.com/read/28532837/interleukin-1%C3%AE-system-in-the-oviducts-of-pigs-during-the-oestrous-cycle-and-early-pregnancy
#18
M Martyniak, A Franczak, G Kotwica
Interleukin-1β (IL-1β) acts throughout the IL-1β system, which contains IL-1β and the IL-1β receptor (IL-1R), accessory protein (IL-1RacP), and receptor antagonist (IL-1Ra). In pigs, the expression of the members of the IL-1β system was documented in uterine tissues during the oestrous cycle and early pregnancy, as well as in embryos harvested during the peri-implantation period. In the oviducts of non-gravid and gravid pigs, the expression of the IL-1β system is unknown. Thus, in this study, the expression of the IL-1β system was examined in porcine oviducts harvested on days 2-3 to 18-20 of the oestrous cycle and on days 2-3 to 15-16 of pregnancy...
July 1, 2017: Theriogenology
https://www.readbyqxmd.com/read/28532827/hepatoma-derived-growth-factor-protein-quantification-in-uterine-fluid-gene-expression-in-endometrial-cell-culture-and-effects-on-in%C3%A2-vitro-embryo-development-pregnancy-and-birth
#19
E Gómez, S Carrocera, D Martin, M J Sánchez-Calabuig, A Gutiérrez-Adán, A Murillo, M Muñoz
Hepatoma-derived growth factor (HDGF) is present in the endometrium of cows and other mammals. Recombinant HDGF (rHDGF) improves bovine blastocyst development in vitro. However, specific culture conditions and essential aspects of HDGF uterine physiology are yet unknown. In this work we quantified total HDGF protein in uterine fluid (UF) by multiple reaction monitoring (MRM), and analyzed effects of rHDGF on specific embryonic stages with Day-6 bovine embryos cultured in vitro with and without BSA, and on pregnancy viability and calf phenotypes after embryo transfer to recipients...
July 1, 2017: Theriogenology
https://www.readbyqxmd.com/read/28529830/adp-ribosyl-cyclases-regulate-early-development-of-the-sea-urchin
#20
Latha Ramakrishnan, Kevin Uhlinger, Leslie Dale, Amro Hamdoun, Sandip Patel
ADP-ribosyl cyclases are multifunctional enzymes involved in the metabolism of nucleotide derivatives necessary for Ca(2+) signalling such as cADPR and NAADP. Although Ca(2+) signalling is a critical regulator of early development, little is known of the role of ADP-ribosyl cyclases during embryogenesis. Here we analyze the expression, activity and function of ADP-ribosyl cyclases in the embryo of the sea urchin - a key organism for study of both Ca(2+) signalling and embryonic development. ADP-ribosyl cyclase isoforms (SpARC1-4) showed unique changes in expression during early development...
June 1, 2016: Messenger
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