Search Results - "Yanagimachi, R"

The Behavior and Acrosomal Status of Mouse Spermatozoa In Vitro, and Within the Oviduct During Fertilization after Natural Mating by Hino, Toshiaki, Muro, Yuko, Tamura-Nakano, Miwa, Okabe, Masaru, Tateno, Hiroyuki, Yanagimachi, Ryuzo

“…Although 90%-100% of mouse oocytes can be fertilized in vitro with capacitated spermatozoa within 1 h after insemination, oocytes within the oviduct are…”
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Germ cells and fertilization: why I studied these topics and what I learned along the path of my study by Yanagimachi, R.

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Intracytoplasmic sperm injection in the mouse by KIMURA, Y, YANAGIMACHI, R

“…Intracytoplasmic sperm injection (ICSI) was successful in the mouse when a piezo-driven micropipette was used instead of a mechanically driven conventional…”
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Cloning: experience from the mouse and other animals by Yanagimachi, R

“…Cloning mammals has been successful for many years by splitting an early embryo or transferring embryonic cell nuclei into enucleated oocytes. Cloning is now…”
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Mouse and human spermatozoa can be freeze-dried without damaging their chromosomes by Kusakabe, H., Yanagimachi, R., Kamiguchi, Y.

“…BACKGROUND Although mouse spermatozoa can be freeze-dried without losing their reproductive capacity, the technique needs further improvements to reduce the…”
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Cloning of male mice from adult tail-tip cells by Wakayama, Teruhiko, Yanagimachi, Ryuzo

“…Cloning entire animals from adult somatic cells has recently been accomplished in sheep, mouse and cow. Thus far, all reported clones derived from adult…”
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Gonadotropin stimulation contributes to an increased incidence of epimutations in ICSI-derived mice by DE WAAL, Eric, YAMAZAKI, Yukiko, INGALE, Puraskar, BARTOLOMEI, Marisa S, YANAGIMACHI, Ryuzo, MCCARREYL, John R

“…We previously demonstrated that intracytoplasmic sperm injection (ICSI), a type of assisted reproductive technology (ART), can induce epimutations and/or…”
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Mouse oocytes injected with testicular spermatozoa or round spermatids can develop into normal offspring by Kimura, Y, Yanagimachi, R

“…Genomic imprinting occurs in both male and female gametes during gametogenesis, but the exact time when imprinting begins and ends is unknown. In the present…”
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Effect of cytokinesis inhibitors, DMSO and the timing of oocyte activation on mouse cloning using cumulus cell nuclei by Wakayama, T, Yanagimachi, R

“…Cloning methods are now well described and in almost routine use. However, the frequencies of production of live offspring from activated oocytes remain at <…”
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Full-term development of mice from enucleated oocytes injected with cumulus cell nuclei by Yanagimachi, R, Wakayama, T, Perry, A. C. F, Zuccotti, M, Johnson, K. R

“…Until recently, fertilization was the only way to produce viable mammalian offspring, a process implicitly involving male and female gametes. However,…”
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Epigenetic Instability in ES Cells and Cloned Mice by Humpherys, David, Eggan, Kevin, Akutsu, Hidenori, Hochedlinger, Konrad, Rideout, William M., Biniszkiewicz, Detlev, Yanagimachi, Ryuzo, Jaenisch, Rudolf

“…Cloning by nuclear transfer (NT) is an inefficient process in which most clones die before birth and survivors often display growth abnormalities. In an effort…”
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Production of offspring after sperm chromosome screening: an experiment using the mouse model by Watanabe, H., Kusakabe, H., Mori, H., Yanagimachi, R., Tateno, H.

“…STUDY QUESTION Is it possible to produce offspring after sperm chromosome screening? SUMMARY ANSWER It is possible to produce zygotes after examining the…”
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Intracytoplasmic sperm injection experiments using the mouse as a model by Yanagimachi, R.

“…Due to the existence of ample background information on its reproduction, embryology and genetics, the mouse is potentially an excellent animal model for…”
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Fertilization and development of mouse oocytes injected with isolated sperm heads by KURETAKE, S, KIMURA, Y, HOSHI, K, YANAGIMACHI, R

“…To determine whether spermatozoa must be structurally intact before microsurgical injection into oocytes for normal fertilization, intact spermatozoa, as well…”
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Development of normal mice from oocytes injected with secondary spermatocyte nuclei by KIMURA, Y, YANAGIMACHI, R

“…This study shows that the nucleus of the secondary spermatocyte can participate in syngamy and normal embryonic development. Spermatogenic cells were released…”
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Fertility of mammalian spermatozoa: its development and relativity by Yanagimachi, R

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X-Chromosome Inactivation in Cloned Mouse Embryos by Eggan, Kevin, Akutsu, Hidenori, Hochedlinger, Konrad, Rideout, William, Yanagimachi, Ryuzo, Jaenisch, Rudolf

“…To study whether cloning resets the epigenetic differences between the two X chromosomes of a somatic female nucleus, we monitored X inactivation in cloned…”
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Analysis of mouse oocyte activation suggests the involvement of sperm perinuclear material by KIMURA, Y, YANAGIMACHI, R, KURETAKE, S, BORTKIEWICZ, H, PERRY, A. C. F, YANAGIMACHI, H

“…The mouse oocyte can be activated by injection of a single, intact mouse spermatozoon or its isolated head. Isolated tails are unable to activate the oocyte…”
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Placentomegaly in Cloned Mouse Concepti Caused by Expansion of the Spongiotrophoblast Layer by TANAKA, Satoshi, ODA, Mayumi, TOYOSHIMA, Yasushi, WAKAYAMA, Teruhiko, TANAKA, Mika, YOSHIDA, Naoko, HATTORI, Naka, OHGANE, Jun, YANAGIMACHI, Ryuzo, SHIOTA, Kunio

“…Hypertrophic placenta, or placentomegaly, has been reported in cloned cattle and mouse concepti, although their placentation processes are quite different from…”
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A Novel Trans-Complementation Assay Suggests Full Mammalian Oocyte Activation Is Coordinately Initiated by Multiple, Submembrane Sperm Components by PERRY, A. C. F, WAKAYAMA, T, YANAGIMACHI, R

“…To initiate normal embryonic development, an egg must receive a signal to become activated at fertilization. We here report that the ability of demembranated…”
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