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Embryo viability

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https://www.readbyqxmd.com/read/28545340/optimized-methods-for-rapidly-dissecting-spinal-cords-and-harvesting-spinal-motor-neurons-with-high-survival-and-purity-from-rats-at-different-embryonic-stages
#1
Shudong Chen, Ruimin Tian, Hui Li, Meihui Chen, Hu Zhang, Dingkun Lin
STUDY DESIGN: Experimental study, protocol optimization. OBJECTIVES: To investigate and compare the isolation of spinal motor neurons from embryonic rats at different embryonic stages, and develop optimized methods for rapidly dissecting spinal cords and harvesting spinal motor neurons with high survival and purity. SETTING: Guangdong Provincial Academy of Chinese Medical Sciences, Guangzhou, China. METHODS: Embryonic rats at different embryonic stages (12-18 days) were used to isolate spinal motor neurons...
May 25, 2017: Journal of Spinal Cord Medicine
https://www.readbyqxmd.com/read/28534597/metabolomics-for-improving-pregnancy-outcomes-in-women-undergoing-assisted-reproductive-technologies
#2
REVIEW
Charalampos S Siristatidis, Eleni Sertedaki, Dennis Vaidakis
BACKGROUND: In order to overcome the low effectiveness of assisted reproductive technologies (ART) and the high incidence of multiple births, metabolomics is proposed as a non-invasive method to assess oocyte quality, embryo viability, and endometrial receptivity, and facilitate a targeted subfertility treatment. OBJECTIVES: To evaluate the effectiveness and safety of metabolomic assessment of oocyte quality, embryo viability, and endometrial receptivity for improving live birth or ongoing pregnancy rates in women undergoing ART, compared to conventional methods of assessment...
May 23, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28534057/the-effect-of-thawing-protocols-on-follicle-conservation-in-human-ovarian-tissue-cryopreservation
#3
T Morewood, N Getreu, B Fuller, J Morris, P Hardiman
BACKGROUND: Ovarian tissue cryopreservation has the potential to improve fertility preservation for a growing number of patients undergoing sterilising therapy, particularly where oocyte or embryo cryopreservation is not suitable. However, its success is limited by significant follicular apoptosis upon thawing, and there is wide variation in thawing protocols used with little evidence of efficacy. OBJECTIVE: To determine the best warming rates to maintain tissue viability...
March 2017: Cryo Letters
https://www.readbyqxmd.com/read/28534051/cooling-strategies-for-brazilian-flounder-paralichthys-orbignyanus-embryos
#4
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/28533817/mosaicism-for-structural-non-centromeric-autosomal-rearrangements-in-disease-defined-carriers-sex-differences-in-the-rearrangements-profile-and-maternal-age-distributions
#5
REVIEW
Natalia V Kovaleva, Philip D Cotter
BACKGROUND: Mosaicism for an autosomal structural rearrangement (Rea) associated with clinical manifestation of chromosomal imbalance is rare. Consequently, there is a lack of basic epidemiological characterization of this kind of mosaicism, such as population rate, cytogenetic profile of Reas involved, maternal age distribution, and sex (male to female) ratio among Rea carriers. The objectives of the present study were: (i) determination of the Rea profile in clinically affected individuals, (ii) comparative analysis of the cytogenetic profile and involvement of single chromosomes to rearrangements in affected and previously reported asymptomatic carriers, (iii) analysis of the male/female ratio in carriers of various types of Rea, and, (iv) examination of parental ages distributions according to carriers' sex...
2017: Molecular Cytogenetics
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
#6
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/28529323/an-immunogenic-phenotype-in-paternal-antigen-specific-cd8-t-cells-at-embryo-implantation-elicits-later-fetal-loss-in-mice
#7
Lachlan M Moldenhauer, Kerrilyn R Diener, John D Hayball, Sarah A Robertson
Central to pregnancy success is a state of T cell tolerance to paternal antigens, which is initiated at conception. The role and regulation of specific phenotypes of CD8(+) T cells in mediating pregnancy tolerance is not clear. This study aimed to investigate the impact on pregnancy outcome of altering the cytokine environment during maternal CD8(+) T cell priming in early pregnancy. Transgenic Act-mOVA male mice were mated to C57BL/6 (B6) females to generate fetuses expressing ovalbumin (OVA) as a model paternal antigen...
May 22, 2017: Immunology and Cell Biology
https://www.readbyqxmd.com/read/28522515/embryo-viability-relies-on-placental-repression
#8
EDITORIAL
Beverly A Purnell
No abstract text is available yet for this article.
May 19, 2017: Science
https://www.readbyqxmd.com/read/28522314/relationship-of-antral-follicular-blood-flow-velocity-to-superovulatory-responses-in-ewes
#9
M E F Oliveira, P M Bartlewski, N Jankowski, L C Padilha-Nakaghi, L G Oliveira, S D Bicudo, J F Fonseca, W R R Vicente
The aim of this study was to examine the association between antral follicular blood flow velocity and the response of ewes to hormonal ovarian superstimulation. Ten Santa Inês ewes were subjected to a short- (7days; Group 1) or long-term (13days; Group 2) progesterone (CIDR(®); InterAg, Hamilton, New Zealand) priming, and a superovulatory treatment with porcine follicle-stimulating hormone (pFSH; Folltropin(®)-V; Bioniche Animal Health, Belleville, ON, Canada), given twice daily for four consecutive days in decreasing doses and initiated four or ten days after CIDR insertion, respectively...
April 24, 2017: Animal Reproduction Science
https://www.readbyqxmd.com/read/28520897/alpha-linolenic-acid-protects-the-developmental-capacity-of-bovine-cumulus-oocyte-complexes-matured-under-lipotoxic-conditions-in-vitro
#10
W F A Marei, J De Bie, O Mohey-Elsaeed, E Wydooghe, P E J Bols, J L M R Leroy
Elevated concentrations of free fatty acids (FFAs), predominantly palmitic, stearic and oleic acids (PSO), exert detrimental effects on oocyte developmental competence. This study examined the effects of omega-3 alpha-linolenic acid (ALA) during in vitro oocyte maturation (IVM) in the presence of PSO on subsequent embryo development and quality, and the cellular mechanisms that might be involved. Bovine cumulus oocyte complexes (COCs) were supplemented during IVM with ALA (50 μM), PSO (425 μM), or PSO+ALA...
May 18, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/28513911/sperm-capacitation-pretreatment-positively-impacts-bovine-intracytoplasmic-sperm-injection
#11
L Águila, F Zambrano, M E Arias, Felmer R
The efficiency of intracytoplasmic sperm injection (ICSI) in bovines is low compared to other species due in part to inadequate egg activation and sperm nucleus decondensation after injection. We hypothesized that this low efficiency is due to the lack of complete sperm capacitation, so we evaluated the effects of isobutylmethylxanthine (IBMX) and methyl-β-cyclodextrin (MβCD) on bovine sperm capacitation and on the preimplantation developmental potential of bovine embryos generated by ICSI. Treatment with IBMX and MβCD decreased sperm viability (between 13 to 30%); nevertheless, 0...
May 17, 2017: Molecular Reproduction and Development
https://www.readbyqxmd.com/read/28499799/mouse%C3%A2-rat-aggregation-chimaeras-can-develop-to-adulthood
#12
Katarzyna Bożyk, Katarzyna Gilecka, Monika Humięcka, Marcin Szpila, Aneta Suwińska, Andrzej K Tarkowski
In order to examine interactions between cells originating from different species during embryonic development we constructed interspecific mouse↔rat chimaeras by aggregation of 8-cell embryos. Embryos of both species expressed different fluorescent markers (eGFP and DsRed), which enabled us to follow the fate of both components from the moment of aggregation until adulthood. We revealed that in majority of embryos the blastocyst cavity appeared inside the group of rat cells, while the mouse component was allocated to the deeper layer of the inner cell mass and to the polar trophectoderm...
May 9, 2017: Developmental Biology
https://www.readbyqxmd.com/read/28490953/determination-of-seed-viability-of-eight-wild-saudi-arabian-species-by-germination-and-x-ray-tests
#13
Turki A Al-Turki, Carol C Baskin
Our purpose was to evaluate the usefulness of the germination vs. the X-ray test in determining the initial viability of seeds of eight wild species (Salvia spinosa, Salvia aegyptiaca, Ochradenus baccatus, Ochradenus arabicus, Suaeda aegyptiaca, Suaeda vermiculata, Prosopisfarcta and Panicumturgidum) from Saudi Arabia. Several days were required to determine viability of all eight species via germination tests, while immediate results on filled/viable seeds were obtained with the X-ray test. Seeds of all the species, except Sa...
May 2017: Saudi Journal of Biological Sciences
https://www.readbyqxmd.com/read/28487025/mouse-prolyl-oligopeptidase-plays-a-role-in-trophoblast-stem-cell-differentiation-into-trophoblast-giant-cell-and-spongiotrophoblast
#14
Yuki Maruyama, Shin Matsubara, Atsushi P Kimura
INTRODUCTION: Prolyl oligopeptidase (prolyl endopeptidase, Prep), a multifunctional protease hydrolyzing -Pro-X- peptide bonds, is highly expressed in the mouse placenta, but the function during development is not known. We explored the possibility of Prep's involvement in placental differentiation. METHODS: We cultured trophoblast stem cells (TSCs) derived from the E6.5 mouse embryo and investigated the detailed expression pattern of Prep during their differentiation...
May 2017: Placenta
https://www.readbyqxmd.com/read/28470453/the-effect-of-follicle-size-and-homogeneity-of-follicular-development-on-the-morphokinetics-of-human-embryos
#15
Semra Kahraman, Caroline Pirkevi Cetinkaya, Murat Cetinkaya, Hakan Yelke, Yesim Kumtepe Colakoglu, Melih Aygun, Markus Montag
PURPOSE: Our aim was to investigate follicular size (large, ≥17 mm and small, <17 mm) at the time of OPU and homogeneity of follicular development (homogenous development: follicles being present in a homogenous spread of all sizes; heterogeneous: a predominance of small and large follicles) by analysing the morphokinetics of embryo development. METHODS: In this prospective cohort study, 2526 COCs belonging to 187 patients were cultured to day 5. Embryos were evaluated morphokinetically...
May 4, 2017: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/28464358/mir-1297-regulates-neural-stem-cell-differentiation-and-viability-through-controlling-hes1-expression
#16
Jiaolin Zheng, Dan Yi, Xiaodong Shi, Huaizhang Shi
OBJECTIVES: Neural stem cells (NSCs) are self-renewing, undifferentiated and multipotent precursors that can generate neuronal and glial lineages. MicroRNAs (miRNAs) are small non-coding RNAs that act crucial roles in cell proliferation, differentiation and migration. However, the role of miR-1297 in the development of NSCs is still unknown. MATERIALS AND METHODS: Primary NSCs were isolated from rat's embryos. The expression of miR-1297 and Hes1 were measured by qRT-PCR...
May 2, 2017: Cell Proliferation
https://www.readbyqxmd.com/read/28460682/role-of-the-calcium-sensing-receptor-casr-in-bovine-gametes-and-during-in%C3%A2-vitro-fertilization
#17
Beatriz Macías-García, Graça Lopes, Antonio Rocha, Lauro González-Fernández
Calcium Sensing Receptor (CaSR) is a G-protein coupled receptor which senses extracellular calcium and activates diverse intracellular pathways. The objective of our work was to demonstrate the presence of CaSR in bovine gametes and its possible role in fertilization and embryo development. The location of CaSR was demonstrated by immunofluorescence in bovine gametes; additionally bovine sperm were incubated with 5, 10 and 15 μM of the specific CaSR inhibitor NPS2143 in a Tyrode's Albumin Lactate Pyruvate medium (4 h)...
June 2017: Theriogenology
https://www.readbyqxmd.com/read/28449966/environmental-concentrations-of-cocaine-and-its-main-metabolites-modulated-antioxidant-response-and-caused-cyto-genotoxic-effects-in-zebrafish-embryo-cells
#18
Marco Parolini, Anna Ghilardi, Camilla Della Torre, Stefano Magni, Laura Prosperi, Matteo Calvagno, Luca Del Giacco, Andrea Binelli
Illicit drugs have been recently identified as a serious environmental problem because of the growing evidence regarding their occurrence in aquatic environment and potential toxicity towards non-target organisms. Among them, cocaine (COC) and its main metabolites, namely benzoylecgonine (BE) and ecgonine methyl ester (EME), are commonly measured in freshwaters worldwide at levels that might cause diverse sub-lethal effects to aquatic organisms. Thus, the present study was aimed at investigating the potential adverse effects induced by the exposure to environmental concentrations (0...
April 24, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28441729/the-influence-of-hydroxyapatite-nanoparticle-morphology-on-embryonic-development-in-a-zebrafish-exposure-model
#19
Shiuli Pujari-Palmer, Xi Lu, Marjam Karlsson Ott
Nanomaterials are used in many different industries such as cosmetics, food, clothing, and electronics. There is increasing concern that exposure to nanoparticles (NPs) during pregnancy can adversely affect fetal development. It is well known that the size, charge, and chemistry of a nanoparticle can modulate embryological development. The role that particle morphology plays on early development, however, is still widely unknown. The present study aims to investigate the effect of hydroxyapatite nanoparticle (HANP) morphology on embryological development in a zebrafish exposure model...
April 22, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28432496/reproductive-effects-of-life-cycle-exposure-to-difenoconazole-on-female-marine-medaka-oryzias-melastigma
#20
Xiaocui Dong, Zhenghong Zuo, Jiaojiao Guo, Hongbin Li, Lemeng Zhang, Meng Chen, Zhibin Yang, Chonggang Wang
Difenoconazole (DFZ) is a widely used triazole fungicide which has been detected in some estuaries and embayments. This study was conducted to investigate the effects of DFZ on ovarian development in female marine medaka (Oryzias melastigma). After 180 days exposure of the embryo to DFZ (0, 1, 10, 100 and 1000 ng/L), the gonadosomatic index and percentage of mature oocytes produced were significantly reduced in the 1, 10 and 100 ng/L treatments but not the 1000 ng/L treatment compared to the control, thus exhibiting a U-shaped dose response curve...
April 21, 2017: Ecotoxicology
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