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https://www.readbyqxmd.com/read/28640859/toxic-effects-of-atrazine-on-porcine-oocytes-and-possible-mechanisms-of-action
#1
Bao Yuan, Shuang Liang, Yong-Xun Jin, Ming-Jun Zhang, Jia-Bao Zhang, Nam-Hyung Kim
Because atrazine is a widely used herbicide, its adverse effects on the reproductive system have been extensively researched. In this study, we investigated the effects of atrazine exposure on porcine oocyte maturation and the possible mechanisms. Our results showed that the rates of oocyte maturation significantly decreased after treatment with 200 μM atrazine in vitro. Atrazine treatment resulted in abnormal spindle morphology but did not affect actin distribution. Atrazine exposure not only triggered a DNA damage response but also decreased MPF levels in porcine oocytes...
2017: PloS One
https://www.readbyqxmd.com/read/28637295/inhibition-of-polyamine-synthesis-causes-entry-of-the-mouse-blastocyst-into-embryonic-diapause1
#2
Jane C Fenelon, Bruce D Murphy
Embryonic diapause is a common reproductive strategy amongst mammals, requiring an intimate cross-talk between the endometrium and the blastocyst. To date, the precise molecular signals responsible are unknown in the mouse or any other mammal. Previous studies in the mink implicate polyamines as major regulators of the control of diapause. In the mouse, inhibiting the rate-limiting enzyme of polyamine synthesis, ornithine decarboxylase (ODC1) during early pregnancy largely prevents implantation, but the fate of the non-implanted embryos is unknown...
June 16, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/28633287/genetic-diseases-and-aneuploidies-can-be-detected-with-a-single-blastocyst-biopsy-a-successful-clinical-approach
#3
Maria Giulia Minasi, Francesco Fiorentino, Alessandra Ruberti, Anil Biricik, Elisabetta Cursio, Ettore Cotroneo, Maria Teresa Varricchio, Matteo Surdo, Francesca Spinella, Ermanno Greco
STUDY QUESTION: Can simultaneous detection of aneuploidies and genetic diseases or chromosomal aberrations in blastocysts reduce the chance of transferring embryos with low implantation potential, guaranteeing good clinical outcomes? SUMMARY ANSWER: The screening for chromosomal aneuploidies revealed that 50.6% of blastocysts diagnosed free of genetic disease or balanced, were aneuploid, therefore avoiding the transfer of blastocysts potentially resulting in implantation failures, miscarriages, or in some cases, in health affected live births...
June 12, 2017: Human Reproduction
https://www.readbyqxmd.com/read/28632762/dot1l-inhibitor-improves-early-development-of-porcine-somatic-cell-nuclear-transfer-embryos
#4
Jia Tao, Yu Zhang, Xiaoyuan Zuo, Renyun Hong, Hui Li, Xing Liu, Weiping Huang, Zubing Cao, Yunhai Zhang
Incomplete epigenetic reprogramming of the genome of donor cells causes poor early and full-term developmental efficiency of somatic cell nuclear transfer (SCNT) embryos. Previous research indicate that inhibition of the histone H3 K79 methyltransferase DOT1L, using a selective pharmacological inhibitor EPZ004777 (EPZ), significantly improved reprogramming efficiency during the generation of mouse induced pluripotent stem cells. However, the roles of DOT1L in porcine nuclear transfer-mediated cellular reprogramming are not yet known...
2017: PloS One
https://www.readbyqxmd.com/read/28630431/role-of-methionine-adenosyltransferase-2a-in-bovine-preimplantation-development-and-its-associated-genomic-regions
#5
Shuntaro Ikeda, Ryouka Kawahara-Miki, Hisataka Iwata, Miki Sugimoto, Shinichi Kume
Methionine adenosyltransferase (MAT) is involved in folate-mediated one-carbon metabolism, which is essential for preimplantation embryos in terms of both short-term periconceptional development and long-term phenotypic programming beyond the periconceptional period. Here, our immunofluorescence analysis of bovine oocytes and preimplantation embryos revealed the consistent expression of MAT2A (the catalytic subunit of the ubiquitously expressed-type of MAT isozyme) during this period. Addition of the MAT2A inhibitor FIDAS to the culture media of bovine preimplantation embryos reduced their blastocyst development, revealing the particular importance of MAT2A in successful blastocyst development...
June 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28630101/oviduct-extracellular-vesicles-protein-content-and-their-role-during-oviduct-embryo-cross-talk
#6
Carmen Alminana, Emilie Corbin, Guillaume Tsikis, Agostinho S Alcantara-Neto, Valérie Labas, Karine Reynaud, Laurent Galio, Rustem Uzbekov, Anastasiia S Garanina, Xavier Druart, Pascal Mermillod
Successful pregnancy requires an appropriate communication between the mother and the embryo. Recently, exosomes and microvesicles, both membrane-bound extracellular vesicles (EVs) present in the oviduct fluid have been proposed as key modulators of this unique cross-talk. However, little is known about their content and their role during oviduct-embryo dialogue. Given the known differences in secretions by in vivo and in vitro oviduct epithelial cells (OEC), we aimed at deciphering the oviduct EVs protein content from both sources...
June 19, 2017: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/28629378/microrna-130b-is-involved-in-bovine-granulosa-and-cumulus-cells-function-oocyte-maturation-and-blastocyst-formation
#7
Pritam Bala Sinha, Dawit Tesfaye, Franca Rings, Munir Hossien, Michael Hoelker, Eva Held, Christaine Neuhoff, Ernst Tholen, Karl Schellander, Dessie Salilew-Wondim
BACKGROUND: Oocyte maturation and preimplantation embryo development are controlled by array of genes that are post-transcriptionally regulated by microRNAs. With respect to this, previously, we identified altered expression of microRNA-130b (miR-130b) during oocyte maturation. Here, we aimed to investigate the role of miR-130b in bovine granulosa and cumulus cell function, oocyte maturation and preimplantation embryo development using gain- and loss-of- function approach. METHODS: For this study, the granulosa cells, cumulus cells and the oocytes were collected from ovaries obtained from slaughterhouse...
June 19, 2017: Journal of Ovarian Research
https://www.readbyqxmd.com/read/28628221/influence-of-radiofrequency-electromagnetic-waves-from-3rd-generation-cellular-phones-on-fertilization-and-embryo-development-in-mice
#8
Satoshi Suzuki, Miho Okutsu, Ryota Suganuma, Hiromi Komiya, Setsu Nakatani-Enomoto, Shunsuke Kobayashi, Yoshikazu Ugawa, Hiroyuki Tateno, Keiya Fujimori
The purpose of this study was to evaluate the effects of 3rd-generation (3G) cellular phone radiofrequency-electromagnetic wave (RF-EMW) exposure on fertilization and embryogenesis in mice. Oocytes and spermatozoa were exposed to 3G cellular phone RF-EMWs, 1.95 GHz wideband code division multiple access, at a specific absorption rate of 2 mW/g for 60 min, or to sham exposure. After RF-EMW exposure, in vitro fertilization and intracytoplasmic sperm injection were performed. Rates of fertilization, embryogenesis (8-cell embryo, blastocyst), and chromosome aberration were compared between the combined spermatozoa and oocyte groups: both exposed, both non-exposed, one exposed, and the other non-exposed...
June 19, 2017: Bioelectromagnetics
https://www.readbyqxmd.com/read/28627630/gene-expression-profiling-of-human-blastocysts-from-in%C3%A2-vivo-and-rescue-ivm-with-or-without-melatonin-treatment
#9
Yan Hao, Zhiguo Zhang, Dan Han, Yunxia Cao, Ping Zhou, Zhaolian Wei, Mingrong Lv, Dawei Chen
To evaluate the effect of melatonin supplementation in maturation medium for human 'rescue IVM' and investigate differences in transcriptomic profile of blastocysts developed from oocytes matured in vitro with/without melatonin treatment and in vivo, a total of 314 GV oocytes and 320 MI oocytes were collected from 200 patients younger than 35 years old undergoing ICSI cycle. The oocytes were randomly distributed in the control group (no melatonin) and four other groups of varying melatonin concentrations (10‑11, 10‑9, 10‑7, 10‑5 mol/l)...
June 9, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28627518/the-unique-immunological-and-microbial-aspects-of-pregnancy
#10
REVIEW
Gil Mor, Paulomi Aldo, Ayesha B Alvero
The comparison of the immunological state of pregnancy to an immunosuppressed host-graft model continues to lead research and clinical practice to ill-defined approaches. This Review discusses recent evidence that supports the idea that immunological responses at the receptive maternal-fetal interface are not simply suppressed but are instead highly dynamic. We discuss the crucial role of trophoblast cells in shaping not only the way in which immune cells respond to the invading blastocyst but also how they collectively react to external stimuli...
June 19, 2017: Nature Reviews. Immunology
https://www.readbyqxmd.com/read/28626751/feeder-cell-type-affects-the-growth-of-in-vitro-cultured-bovine-trophoblast-cells
#11
Islam M Saadeldin, Ahmed Abdelfattah-Hassan, Ayman Abdel-Aziz Swelum
Trophectoderm cells are the foremost embryonic cells to differentiate with prospective stem-cell properties. In the current study, we aimed at improving the current approach for trophoblast culture by using granulosa cells as feeders. Porcine granulosa cells (PGCs) compared to the conventional mouse embryonic fibroblasts (MEFs) were used to grow trophectoderm cells from hatched bovine blastocysts. Isolated trophectoderm cells were monitored and displayed characteristic epithelial/cuboidal morphology. The isolated trophectoderm cells expressed mRNA of homeobox protein (CDX2), cytokeratin-8 (KRT8), and interferon tau (IFNT)...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28625759/predictive-value-of-serum-hcg-concentrations-in-pregnancies-achieved-after-single-fresh-or-vitrified-warmed-blastocyst-transfer
#12
Galia Oron, Tal Shavit, Efrat Esh-Broder, Son Weon-Young, Togas Tulandi, Hananel Holzer
Possible differences between serum HCG levels in pregnancies achieved after transfer of a single fresh or a vitrified-warmed blastocyst were evaluated. Out of 1130 single blastocyst transfers resulting in positive HCG results, 789 were single fresh blastocyst transfers and 341 single vitrified-warmed blastocyst transfers. The initial serum HCG levels of 869 clinical intrauterine pregnancies were evaluated, 638 after the transfer of a single fresh blastocysts and 231 after the transfer of a single vitrified-warmed blastocysts...
May 30, 2017: Reproductive Biomedicine Online
https://www.readbyqxmd.com/read/28625274/beneficial-effects-of-melatonin-on-in-vitro-embryo-production-from-juvenile-goat-oocytes
#13
Sandra Soto-Heras, Montserrat Roura, Maria G Catalá, Irene Menéndez-Blanco, Dolors Izquierdo, Ali A Fouladi-Nashta, Maria T Paramio
Melatonin is a universal antioxidant that improves in vitro embryo production in several species. The aims of this study were to determine the melatonin concentration in the ovarian follicular fluid (FF) of juvenile goats and the effect of melatonin during in vitro maturation (IVM) on embryo development. The FF melatonin concentration was 0.57--1.07×10-9 M, increasing with follicular diameter. Oocytes were matured, fertilised and cultured under conventional conditions. Blastocyst development, embryo quality and levels of reactive oxygen species (ROS) and reduced glutathione were assessed...
June 19, 2017: Reproduction, Fertility, and Development
https://www.readbyqxmd.com/read/28621329/single-cell-multi-omics-sequencing-of-mouse-early-embryos-and-embryonic-stem-cells
#14
Fan Guo, Lin Li, Jingyun Li, Xinglong Wu, Boqiang Hu, Ping Zhu, Lu Wen, Fuchou Tang
Single-cell epigenome sequencing techniques have recently been developed. However, the combination of different layers of epigenome sequencing in an individual cell has not yet been achieved. Here, we developed a single-cell multi-omics sequencing technology (single-cell COOL-seq) that can analyze the chromatin state/nucleosome positioning, DNA methylation, copy number variation and ploidy simultaneously from the same individual mammalian cell. We used this method to analyze the reprogramming of the chromatin state and DNA methylation in mouse preimplantation embryos...
June 16, 2017: Cell Research
https://www.readbyqxmd.com/read/28619101/in-vitro-production-of-bovine-embryos-derived-from-individual-donors-in-the-corral-%C3%A2-dish
#15
Maaike Catteeuw, Eline Wydooghe, Erik Mullaart, Hiemke M Knijn, Ann Van Soom
BACKGROUND: Since the identity of the embryo is of outmost importance during commercial in vitro embryo production, bovine oocytes and embryos have to be cultured strictly per donor. Due to the rather low yield of oocytes collected after ovum pick-up (OPU) per individual cow, oocyte maturation and embryo culture take place in small groups, which is often associated with inferior embryo development. The objective of this study was to improve embryonic development in small donor groups by using the Corral(®) dish...
June 15, 2017: Acta Veterinaria Scandinavica
https://www.readbyqxmd.com/read/28617821/supplementation-with-small-extracellular-vesicles-from-ovarian-follicular-fluid-during-in-vitro-production-modulates-bovine-embryo-development
#16
Juliano C da Silveira, Gabriella M Andrade, Maite Del Collado, Rafael V Sampaio, Juliano R Sangalli, Luciano A Silva, Fábio V L Pinaffi, Izabelle B Jardim, Marcelo C Cesar, Marcelo F G Nogueira, Aline S M Cesar, Luiz L Coutinho, Rinaldo W Pereira, Felipe Perecin, Flávio V Meirelles
Pregnancy success results from the interaction of multiple factors, among them are folliculogenesis and early embryonic development. Failure during these different processes can lead to difficulties in conception. Alternatives to overcome these problems are based on assisted reproductive techniques. Extracellular vesicles are cell-secreted vesicles present in different body fluids and contain bioactive materials, such as messenger RNA, microRNAs (miRNAs), and proteins. Thus, our hypothesis is that extracellular vesicles from follicular fluid from 3-6 mm ovarian follicles can modulate bovine embryo development in vitro...
2017: PloS One
https://www.readbyqxmd.com/read/28609472/no-evidence-for-genome-editing-in-mouse-zygotes-and-hek293t-human-cell-line-using-the-dna-guided-natronobacterium-gregoryi-argonaute-ngago
#17
Nay Chi Khin, Jenna L Lowe, Lora M Jensen, Gaetan Burgio
A recently published research article reported that the extreme halophile archaebacterium Natronobacterium gregoryi Argonaute enzyme (NgAgo) could cleave the cellular DNA under physiological temperature conditions in cell line and be implemented as an alternative to CRISPR/Cas9 genome editing technology. We assessed this claim in mouse zygotes for four loci (Sptb, Tet-1, Tet-2 and Tet-3) and in the human HEK293T cell line for the EMX1 locus. Over 100 zygotes were microinjected with nls-NgAgo-GK plasmid provided from Addgene and various concentrations of 5'-phosphorylated guide DNA (gDNA) from 2...
2017: PloS One
https://www.readbyqxmd.com/read/28609368/derivation-and-characterization-of-a-pig-embryonic-stem-cell-derived-exocrine-pancreatic-cell-line
#18
Neil C Talbot, Amy E Shannon, Caitlin E Phillips, Wesley M Garrett
OBJECTIVES: The aim of this study was to identify an epithelial cell line isolated from the spontaneous differentiation of totipotent pig epiblast cells. METHODS: PICM-31 and its colony-cloned derivative cell line, PICM-31A, were established from the culture and differentiation of an epiblast mass isolated from an 8-day-old pig blastocyst. The cell lines were analyzed by transmission electron microscopy, marker gene expression, and mass spectroscopy-based proteomics...
July 2017: Pancreas
https://www.readbyqxmd.com/read/28608468/toll-like-receptor4-as-a-modulator-of-fertilization-and-subsequent-pre-implantation-development-following-in-vitro-maturation-in-mice
#19
Sara Hosseini, Maryam Dehghani-Mohammadabadi, Marefat Ghafarri Novin, Mostafa Haji Molla Hoseini, Ehsan Arefian, Samira Mohammadi Yeganeh, Mohammad Salehi
PROBLEM: The use of in vitro maturation (IVM) as an alternative approach to the conventional assisted reproductive technique in clinical practice is limited due to low fertilization rate. The expression of Toll-like receptors (TLRs) as members of an innate immune system in cumulus cells are thought to affect fertilization. This study was aimed to evaluate the effect of IVM on TLR4 gene expression and fertilization rate in oocytes derived from IVM in comparison with in vivo matured one...
June 13, 2017: American Journal of Reproductive Immunology: AJRI
https://www.readbyqxmd.com/read/28605413/acute-bovine-viral-diarrhoea-virus-infection-inhibits-expression-of-interferon-tau-stimulated-genes-in-bovine-endometrium
#20
Zhangrui Cheng, Latta Chauhan, Amy Teresa Barry, Ayimuguli Abudureyimu, Chike F Oguejiofor, Xing Chen, D Claire Wathes
Bovine viral diarrhoea virus (BVDV) can evade host detection by down-regulation of interferon signalling pathways. Infection of cows with non-cytopathic (ncp) BVDV can cause early embryonic mortality. Upregulation of type I interferon stimulated genes (ISGs) by blastocyst-secreted interferon tau (IFNT) is a crucial component of the maternal recognition of pregnancy (MRP) in ruminants. This study investigated the potential of acute BVDV infection to disrupt MRP by modulating endometrial ISG expression. Endometrial cells from 10 BVDV-free cows were cultured and treated with 0 or 100 ng/ml IFNT for 24 h in the absence or presence of ncpBVDV infection to yield 4 treatment groups: CONT, ncpBVDV, IFNT or ncpBVDV+IFNT...
June 12, 2017: Biology of Reproduction
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