Search Results - "First, N.L"

Gene expression in bovine nuclear transfer embryos in relation to donor cell efficiency in producing live offspring by Beyhan, Z., Forsberg, E.J., Eilertsen, K.J., Kent-First, M., First, N.L.

“…Developmental abnormalities associated with the cloning process suggest that reprogramming of donor nuclei into an embryonic state may not be fully completed…”
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Inhibition of Protein Kinases after an Induced Calcium Transient Causes Transition of Bovine Oocytes to Embryonic Cycles without Meiotic Completion by Susko-Parrish, J.L., Leibfried-Rutledge, M.L., Northey, D.L., Schutzkus, V., First, N.L.

“…We have examined the response of bovine oocytes matured in vitro for 24 hr to parthenogenic activation using compounds that increase intracellular calcium…”
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Microtubule Organization in the Cow during Fertilization, Polyspermy, Parthenogenesis, and Nuclear Transfer: The Role of the Sperm Aster by Navara, C.S., First, N.L., Schatten, G.

“…Microtubule organization in bovine oocytes during fertilization, polyspermy, parthenogenesis, and nuclear transfer is examined with the goal of understanding…”
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Relationship between the maturational state of oocytes at the time of insemination and sex ratio of subsequent early bovine embryos by Dominko, T., First, N.L.

“…The effect of maturational state of bovine oocytes at the time of insemination on early embryo development and the sex ratio of developing embryos was…”
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Aspects of follicle and oocyte stage that affect in vitro maturation and development of bovine oocytes by Arlotto, T., Schwartz, J-L., First, N.L., Leibfried-Rutledge, M.L.

“…Success of in vitro maturation (IVM) and production of bovine embryos as related to aspects of follicle source and oocyte size were evaluated. First, it was…”
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Sexual dimorphism in IVM-IVF bovine embryos produced from x and y chromosome-bearing spermatozoa sorted by high speed flow cytometry by Beyhan, Z., Johnson, L.A., First, N.L.

“…The objective of this study was to examine preimplantation development and sperm aster characteristics of bovine male and female embryos produced by using…”
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Checkpoint control of the G2/M phase transition during the first mitotic cycle in mammalian eggs by Fulka, J., First, N.L., Fulka1, J., Moor, R.M.

“…The high incidence of chromosomally abnormal human embryos is frequently assumed to be due to a lack of checkpoint controls operating during early…”
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A combination of EGF and IGF-I accelerates the progression of meiosis in bovine follicular oocytes in vitro and fetal calf serum neutrali zes the acceleration effect by Sakaguchi, M., Dominko, T., Leibfried-Rutledge, M.L., Nagai, T., First, N.L.

“…The effects of a combination of EGF and IGF-I (GFs) on the progress of meiosis and on their developmental competence were examined in cumulus-enclosed bovine…”
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Dynamics of global transcriptome in bovine matured oocytes and preimplantation embryos by Misirlioglu, M, Page, G.P, Sagirkaya, H, Kaya, A, Parrish, J.J, First, N.L, Memili, E

“…Global activation of the embryonic genome is the most critical event in early mammalian development. After fertilization, a rich supply of maternal proteins…”
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Developmental potential of bovine oocytes cultured in different maturation and culture conditions by Sagirkaya, Hakan, Misirlioglu, Muge, Kaya, Abdullah, First, Neal L., Parrish, John J., Memili, Erdogan

“…Diverse groups of chemicals in culture media are needed for successful bovine oocyte maturation and embryo development during which dramatic cytoplasmic and…”
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Zygotic and embryonic gene expression in cow: a review of timing and mechanisms of early gene expression as compared with other species by Memili, E, First, N L

“…Early embryonic development is largely dependent on maternal RNAs and proteins synthesised during oogenesis. Zygotic transcription is an essential event that…”
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Proteoglycan from bovine follicular fluid enhances an acrosome reaction in bovine spermatozoa by Lenz, R W, Ax, R L, Grimek, H J, First, N L

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Control of gene expression at the onset of bovine embryonic development by Memili, E, First, N.L

“…The objective of this study was to examine the timing and mechanisms involved in transcription initiation in bovine embryos. Transcriptional activity and its…”
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Glycosaminoglycans in bovine cumulus-oocyte complexes: morphology and chemistry by Ball, G D, Bellin, M E, Ax, R L, First, N L

“…Bovine cumulus-oocyte complexes from small (1-5 mm) follicles were cultured for 24 h in 0.25 ml minimum essential medium supplemented with 10% fetal bovine…”
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Genome-wide epigenetic alterations in cloned bovine fetuses by Cezar, G.G, Bartolomei, M.S, Forsberg, E.J, First, N.L, Bishop, M.D, Eilertsen, K.J

“…To gain a better understanding of global methylation differences associated with development of nuclear transfer (NT)-generated cattle, we analyzed the…”
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Onset of transcription in bovine oocytes and preimplantation embryos by Memili, E, Dominko, T, First, N.L

“…The transition from the maternal to embryonic control of early embryonic development (MET) in mammals is not fully understood. The objective of this study was…”
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Developmental changes in RNA polymerase II in bovine oocytes, early embryos, and effect of alpha-amanitin on embryo development by Memili, E, First, N.L

“…Development of mammalian early embryos relies on stored maternal messenger RNAs (mRNAs) that have been synthesized during oogenesis until embryonic genome…”
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Production of calves by transfer of nuclei from cultured inner cell mass cells by Sims, M, First, N.L

“…We report here the isolation and in vitro culture of bovine inner cell mass (ICM) cells and the use of ICM cells in nuclear transfer to produce totipotent…”
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Timing of meiotic progression in bovine oocytes and its effect on early embryo development by Dominko, T, First, N.L

“…This study was designed to investigate the effect of the kinetics of nuclear maturation in bovine oocytes on early embryo development and to examine whether…”
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Development of bovine embryos in vitro as affected by energy substrates by Rosenkrans, C.F. Jr, Zeng, G.Q, McNamara, G.T, Schoff, P.K, First, N.L

“…Simple media were developed to study the metabolic requirements of bovine embryos up to Day 7 (Day 0 = day of oocyte aspiration) in vitro. Embryos were derived…”
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