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https://www.readbyqxmd.com/read/28930603/centchroman-a-safe-reversible-postcoital-contraceptive-with-curative-and-prophylactic-activity-in-many-disorders
#1
Ved P Kamboj, Suprabhat Ray, Nitya Anand
Centchroman (INN: Ormeloxifene), a reversible post-coital/weekly oral contraceptive (half-life of about 168 hours), designed and developed at CDRI, Lucknow is the only non-steroidal oral contraceptive in clinical use in the world today. Synthesized in 1967 and completing pre-clinical and clinical studies in 1989, this drug was approved for marketing in 1991, social marketing in 1995 and NFPW in April 2016. It acts by preventing implantation of blastocyst in endometrium. It is the only contraceptive which neither suppresses ovulation nor interferes with the hypothalamic-pituitary-ovarian axis...
January 1, 2018: Frontiers in Bioscience (Elite Edition)
https://www.readbyqxmd.com/read/28930172/rhein-induces-oxidative-stress-and-apoptosis-in-mouse-blastocysts-and-has-immunotoxic-effects-during-embryonic-development
#2
Chien-Hsun Huang, Wen-Hsiung Chan
Rhein, a glucoside chemical compound found in a traditional Chinese medicine derived from the roots of rhubarb, induces cell apoptosis and is considered to have high potential as an antitumor drug. Several previous studies showed that rhein can inhibit cell proliferation and trigger mitochondria-related or endoplasmic reticulum (ER) stress-dependent apoptotic processes. However, the side effects of rhein on pre- and post-implantation embryonic development remain unclear. Here, we show that rhein has cytotoxic effects on blastocyst-stage mouse embryos and induces oxidative stress and immunotoxicity in mouse fetuses...
September 20, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28929987/cell-and-genetic-predictors-of-human-blastocyst-hatching-success-in-assisted-reproduction
#3
Anastasiya G Syrkasheva, Nataliya V Dolgushina, Andrey Yu Romanov, Olga V Burmenskaya, Nataliya P Makarova, Espet O Ibragimova, Elena A Kalinina, Gennady T Sukhikh
The aim was to identify cell and genetic predictors of human blastocyst hatching success in assisted reproduction programmes via a prospective case-control study. Blastocysts, donated by couples in assisted reproduction programmes were used. Hatching success assessment was performed after 144-146 h post-fertilization. The mRNA expression levels of cathepsin V (CTSV), GATA-binding protein 3 (GATA3) and human chorionic gonadotropin beta subunit 3, 5, 7 and 8 (CGB) genes were detected by quantitative real-time polymerase chain reaction...
September 20, 2017: Zygote: the Biology of Gametes and Early Embryos
https://www.readbyqxmd.com/read/28929986/the-effect-of-temperature-on-the-initial-development-of-brycon-amazonicus-spix-agassiz-1829-as-tool-for-micromanipulation-of-embryos
#4
Regiane Cristina da Silva, Matheus Pereira Dos Santos, José Augusto Senhorini, Maria do Carmo Faria Paes, Fernanda Nogueira Valentin, Takafumi Fujimoto, Nivaldo Ferreira do Nascimento, George Shigueki Yasui, Laura Satiko Okada Nakaghi
Primordial germ cell (PGC) transplant is a promising tool in aquaculture; however, successful use of this technique requires in depth knowledge of the early stages of embryo and larval development. The aim of this study was to analyse the effect of different temperatures (22, 26, and 30°C) on the early development of B. amazonicus. The newly fertilized eggs were distributed into tanks with controlled temperature and oxygenation. Samples were collected at pre-established times and analysed under light and fluorescence microscopy...
September 20, 2017: Zygote: the Biology of Gametes and Early Embryos
https://www.readbyqxmd.com/read/28929981/the-presence-of-acylated-ghrelin-during-in-vitro-maturation-of-bovine-oocytes-induces-cumulus-cell-dna-damage-and-apoptosis-and-impairs-early-embryo-development
#5
Matias A Sirini, Juan Mateo Anchordoquy, Juan Patricio Anchordoquy, Ana M Pascua, Noelia Nikoloff, Ana Carranza, Alejandro E Relling, Cecilia C Furnus
The aim of this study was to investigate the effects of acylated ghrelin supplementation during in vitro maturation (IVM) of bovine oocytes. IVM medium was supplemented with 20, 40 or 60 pM acylated ghrelin concentrations. Cumulus expansion area and oocyte nuclear maturation were studied as maturation parameters. Cumulus-oocyte complexes (COC) were assessed with the comet, apoptosis and viability assays. The in vitro effects of acylated ghrelin on embryo developmental capacity and embryo quality were also evaluated...
September 20, 2017: Zygote: the Biology of Gametes and Early Embryos
https://www.readbyqxmd.com/read/28929977/exposure-to-follicular-fluid-during-oocyte-maturation-and-oviductal-fluid-during-post-maturation-does-not-improve-in-vitro-embryo-production-in-the-horse
#6
Cécile Douet, Olivia Parodi, Nicola Antonio Martino, Giovanni Michele Lacalandra, Michele Nicassio, Fabrice Reigner, Stefan Deleuze, Maria Elena Dell'Aquila, Ghylène Goudet
Most wild equids and many domestic horse breeds are at risk of extinction, so there is an urgent need for genome resource banking. Embryos cryopreservation allows the preservation of genetics from male and female and is the fastest method to restore a breed. In the equine, embryo production in vitro would allow the production of several embryos per cycle. Intracytoplasmic sperm injection (ICSI) is used to generate horse embryos, but it requires expensive equipment and expertise in micromanipulation, and blastocyst development rates remain low...
September 20, 2017: Zygote: the Biology of Gametes and Early Embryos
https://www.readbyqxmd.com/read/28928280/the-enigma-of-embryonic-diapause
#7
REVIEW
Marilyn B Renfree, Jane C Fenelon
Embryonic diapause - a period of embryonic suspension at the blastocyst stage - is a fascinating phenomenon that occurs in over 130 species of mammals, ranging from bears and badgers to mice and marsupials. It might even occur in humans. During diapause, there is minimal cell division and greatly reduced metabolism, and development is put on hold. Yet there are no ill effects for the pregnancy when it eventually continues. Multiple factors can induce diapause, including seasonal supplies of food, temperature, photoperiod and lactation...
September 15, 2017: Development
https://www.readbyqxmd.com/read/28927798/effect-of-charcoal-dextran-stripped-fetal-bovine-serum-on-in-vitro-development-of-bovine-embryos
#8
Ayman Mesalam, Rami Kong, Imran Khan, Mmr Chowdhury, Byung-Hyun Choi, Sung Woo Kim, Kyu-Woan Cho, Jong-In Jin, Il-Keun Kong
This study investigated the ability of charcoal:dextran stripped fetal bovine serum (CDS FBS) and heat-inactivated fetal bovine serum (HI FBS) to support in vitro development of bovine embryos. The developmental ability and quality of bovine embryos were determined by assessing their cell number, lipid content, mitochondrial activity, gene expression, and cryo-tolerance. The percentage of embryos that formed a blastocyst was significantly (P<0.05) higher in medium containing CDS FBS than in medium containing HI FBS (42...
September 16, 2017: Reproductive Biology
https://www.readbyqxmd.com/read/28927797/the-decline-of-pregnancy-rate-and-abnormal-uterine-responsiveness-of-steroid-hormones-in-aging-mice
#9
Meng-Qi Li, Mei-Nan Yao, Jia-Qi Yan, Zi-Long Li, Xiao-Wei Gu, Shuai Lin, Wei Hu, Zeng-Ming Yang
Reproductive capacity in animals and women declines with increasing age. Although ovarian aging is considered as a main cause for the decline of pregnancy rate, whether uterine aging occurs remains unclear. Even if blastocysts are transferred from young donors to older pseudopregnant recipients, the rate of implantation is still low, suggesting the occurrence of uterine aging. In this study, we compared the pregnancy rate and the uterine responsiveness of steroid hormones in ovariectomized mice at age between 2- and 12-month-old...
September 16, 2017: Reproductive Biology
https://www.readbyqxmd.com/read/28923420/high-doses-of-lipid-core-nanocapsules-do-not-affect-bovine-embryonic-development-in-vitro
#10
Caroline Lucas, Mariana Remião, Franciele Bruinsmann, Isadora Lopes, Morgana Borges, Ana Laura Feijó, Andrea Cristina Basso, Adriana Pohlmann, Silvia Guterres, Vinicius Campos, Fabiana Seixas, Tiago Collares
The improvement of in vitro embryo production by culture media supplementation has been a potential tool to increase blastocyst quality and development. Recently, lipid-core nanocapsules (LNC), which were developed for biomedical applications as a drug-delivery system, have demonstrated beneficial effects on in vitro embryo production studies. LNCs have a core composed of sorbitan monostearate dispersed in capric/caprylic triglyceride. Based on that, we firstly investigated if LNCs supplemented during in vitro oocyte maturation had affinity to the mineral oil placed over the top of the IVM media...
September 15, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28923286/abnormally-fertilized-oocytes-can-result-in-healthy-live-births-improved-genetic-technologies-for-preimplantation-genetic-testing-can-be-used-to-rescue-viable-embryos-in-in-vitro-fertilization-cycles
#11
Antonio Capalbo, Nathan Treff, Danilo Cimadomo, Xin Tao, Susanna Ferrero, Alberto Vaiarelli, Silvia Colamaria, Roberta Maggiulli, Giovanna Orlando, Catello Scarica, Richard Scott, Filippo Maria Ubaldi, Laura Rienzi
OBJECTIVE: To test whether abnormally fertilized oocyte (AFO)-derived blastocysts are diploid and can be rescued for clinical use. DESIGN: Longitudinal-cohort study from January 2015 to September 2016 involving IVF cycles with preimplantation genetic testing for aneuploidy (PGT-A). Ploidy assessment was incorporated whenever a blastocyst from a monopronuclear (1PN) or tripronuclear zygote (2PN + 1 smaller PN; 2.1 PN) was obtained. SETTING: Private IVF clinics and genetics laboratories...
September 15, 2017: Fertility and Sterility
https://www.readbyqxmd.com/read/28923285/patient-and-cycle-characteristics-predicting-high-pregnancy-rates-with-single-embryo-transfer-an-analysis-of-the-society-for-assisted-reproductive-technology-outcomes-between-2004-and-2013
#12
Jennifer Mersereau, Jamie Stanhiser, Charles Coddington, Tiffany Jones, Barbara Luke, Morton B Brown
OBJECTIVE: To analyze factors associated with high live birth rate and low multiple birth rate in fresh and frozen-thawed assisted reproductive technology (ART) cycles. DESIGN: Retrospective cohort analysis. SETTING: Not applicable. PATIENT(S): The study population included 181,523 women undergoing in vitro fertilization with autologous fresh first cycles, 27,033 with fresh first oocyte donor cycles, 37,658 with fresh second cycles, and 35,446 with frozen-thawed second cycles...
September 15, 2017: Fertility and Sterility
https://www.readbyqxmd.com/read/28922973/a-new-wnt1-cre-tomatorosa-es-cell-line-a-tool-for-studying-neural-crest-cell-integration-capacity
#13
Soledad Acuna Mendoza, Sabrina Martin, Sabine Kuchler-Bopp, Sandy Ribes, Jeremy H Thalgott, Catherine Chaussain, Sophie Creuzet, Hervé Lesot, Franck Lebrin, Anne Poliard
Neural crest (NC) cells are a migratory, multipotent population giving rise to numerous lineages in the embryo. Their plasticity renders attractive their use in tissue engineering-based therapies but further knowledge on their in vivo behaviour is required before clinical transfer may be envisioned. We here describe isolation and characterization of a new mouse ES line derived from Wnt1-CRE-R26 RosaTomatoTdv blastocyst and show that it displays the characteristics of typical ES cells. Furthermore, these cells can be efficiently directed towards a NC stem cell-like phenotype as attested by concomitant expression of NC marker genes and Tomato fluorescence...
September 19, 2017: Stem Cells and Development
https://www.readbyqxmd.com/read/28922408/the-role-of-the-pi3k-akt-signaling-pathway-in-the-developmental-competence-of-bovine-oocytes
#14
Gabriella Mamede Andrade, Juliano Coelho da Silveira, Claudia Perrini, Maite Del Collado, Samuel Gebremedhn, Dawit Tesfaye, Flávio Vieira Meirelles, Felipe Perecin
The ovarian follicle encloses oocytes in a microenvironment throughout their growth and acquisition of competence. Evidence suggests a dynamic interplay among follicular cells and oocytes, since they are constantly exchanging "messages". We dissected bovine ovarian follicles and recovered follicular cells (FCs-granulosa and cumulus cells) and cumulus-oocyte complexes (COCs) to investigate whether the PI3K-Akt signaling pathway impacted oocyte quality. Following follicle rupture, COCs were individually selected for in vitro cultures to track the follicular cells based on oocyte competence to reach the blastocyst stage after parthenogenetic activation...
2017: PloS One
https://www.readbyqxmd.com/read/28921398/preliminary-analysis-of-numerical-chromosome-abnormalities-in-reciprocal-and-robertsonian-translocation-preimplantation-genetic-diagnosis-cases-with-24-chromosomal-analysis-with-an-acgh-snp-microarray
#15
Yanxin Xie, Yanwen Xu, Jing Wang, Benyu Miao, Yanhong Zeng, Chenhui Ding, Jun Gao, Canquan Zhou
PURPOSE: The aim of this study was to determine whether an interchromosomal effect (ICE) occurred in embryos obtained from reciprocal translocation (rcp) and Robertsonian translocation (RT) carriers who were following a preimplantation genetic diagnosis (PGD) with whole chromosome screening with an aCGH and SNP microarray. We also analyzed the chromosomal numerical abnormalities in embryos with aneuploidy in parental chromosomes that were not involved with a translocation and balanced in involved parental translocation chromosomes...
September 18, 2017: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/28920413/functional-role-of-forskolin-and-pd166285-in-the-development-of-denuded-mouse-oocytes
#16
Hongguo Cao, Yani Bian, Fei Zhang, Yunshu Tang, Caixia Li, Jiemei Chen, Xiaorong Zhang
Objective: cAMP and MPF play critical roles during the maturation of mammalian oocytes. The aim of this study was to produce the offspring from denuded oocytes in mice by regulating cAMP and MPF. Methods: In this study, we used DOs at the germinal vesicle (GV) stage in mice and regulated levels of cAMP and MPF in DOs by adding Forskolin and PD166285 during in vitro maturation (IVM) without FSH and LH respectively. Results: Combined use of 50 μM Forskolin for 3 h and 2...
September 18, 2017: Asian-Australasian Journal of Animal Sciences
https://www.readbyqxmd.com/read/28919262/pdgfra-is-not-essential-for-the-derivation-and-maintenance-of-mouse-extraembryonic-endoderm-stem-cell-lines
#17
Jiangwei Lin, Mona Khan, Bolek Zapiec, Peter Mombaerts
Extraembryonic endoderm stem (XEN) cell lines can be derived and maintained in vitro and reflect the primitive endoderm lineage. Platelet-derived growth factor receptor alpha (PDGFRA) is thought to be essential for the derivation and maintenance of mouse XEN cell lines. Here, we have re-evaluated this requirement for PDGFRA. We derived multiple PDGFRA-deficient XEN cell lines from postimplantation and preimplantation embryos of a PDGFRA-GFP knockout strain. We also converted PDGFRA-deficient embryonic stem cell lines into XEN cell lines chemically by transient culturing with retinoic acid and Activin A...
September 8, 2017: Stem Cell Reports
https://www.readbyqxmd.com/read/28919260/blockage-of-the-epithelial-to-mesenchymal-transition-is-required-for-embryonic-stem-cell-derivation
#18
Mehdi Totonchi, Seyedeh-Nafiseh Hassani, Ali Sharifi-Zarchi, Natalia Tapia, Kenjiro Adachi, Julia Arand, Boris Greber, Davood Sabour, Marcos J Araúzo-Bravo, Jörn Walter, Mohammad Pakzad, Hamid Gourabi, Hans R Schöler, Hossein Baharvand
Pluripotent cells emanate from the inner cell mass (ICM) of the blastocyst and when cultivated under optimal conditions immortalize as embryonic stem cells (ESCs). The fundamental mechanism underlying ESC derivation has, however, remained elusive. Recently, we have devised a highly efficient approach for establishing ESCs, through inhibition of the MEK and TGF-β pathways. This regimen provides a platform for dissecting the molecular mechanism of ESC derivation. Via temporal gene expression analysis, we reveal key genes involved in the ICM to ESC transition...
September 6, 2017: Stem Cell Reports
https://www.readbyqxmd.com/read/28913567/two-cell-embryos-are-more-sensitive-than-blastocysts-to-ampk-dependent-suppression-of-anabolism-and-stemness-by-commonly-used-fertility-drugs-a-diet-supplement-and-stress
#19
Alan Bolnick, Mohammed Abdulhasan, Brian Kilburn, Yufen Xie, Mindie Howard, Paul Andresen, Alexandra M Shamir, Jing Dai, Elizabeth E Puscheck, Eric Secor, Daniel A Rappolee
PURPOSE: This study tests whether metformin or diet supplement BR-DIM-induced AMP-activated protein kinase (AMPK) mediated effects on development are more pronounced in blastocysts or 2-cell mouse embryos. METHODS: Culture mouse zygotes to two-cell embryos and test effects after 0.5-1 h AMPK agonists' (e.g., Met, BR-DIM) exposure on AMPK-dependent ACCser79P phosphorylation and/or Oct4 by immunofluorescence. Culture morulae to blastocysts and test for increased ACCser79P, decreased Oct4 and for AMPK dependence by coculture with AMPK inhibitor compound C (CC)...
September 15, 2017: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/28913142/day-3-embryo-transfer-versus-day-5-blastocyst-transfers-a-prospective-randomized-controlled-trial
#20
Şafak Hatırnaz, Mine Kanat Pektaş
OBJECTIVE: This study aimed to show whether transferring day 5 embryos resulted in higher implantation and pregnancy rates than transferring day 3 embryos in Turkish women undergoing an intracytoplasmic sperm injection (ICSI) cycle. MATERIALS AND METHODS: A total of 190 women who had ICSI after retrieval of more than four oocytes on the day of fertilization check were randomly assigned to undergo embryo transfer either on day 3 or day 5. RESULTS: Day 3 and day 5 transfers were statistically similar with respect to the age of woman (p=0...
June 2017: Turk J Obstet Gynecol
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