Jacob, H. J. Functional genomics and rat models. Genome Res. 9, 1013–1016 (1999).
Google Scholar
Aitman, T. J. et al. Progress and prospects in rat genetics: a community view. Nat. Genet. 40, 516–522 (2008).
Google Scholar
Li, D. et al. Heritable gene targeting in the mouse and rat using a CRISPR-Cas system. Nat. Biotechnol. 31, 681–683 (2013).
Google Scholar
Li, W., Teng, F., Li, T. & Zhou, Q. Simultaneous generation and germline transmission of multiple gene mutations in rat using CRISPR-Cas systems. Nat. Biotechnol. 31, 684–686 (2013).
Google Scholar
Kaneko, T., Sakuma, T., Yamamoto, T. & Mashimo, T. Simple knockout by electroporation of engineered endonucleases into intact rat embryos. Sci. Rep. 4, 6382 (2014).
Google Scholar
Kaneko, T. Genome editing in mouse and rat by electroporation. Methods Mol Biol. 1630, 81–89 (2017).
Google Scholar
Kaneko, T. & Tanaka, S. Improvement of genome editing by electroporation using embryos artificially removed cumulus cells in the oviducts. Biochem. Biophys. Res. Commun. 527, 1039–1042 (2020).
Google Scholar
Varisli, O., Uguz, C., Agca, C. & Agca, Y. Various physical stress factors on rat sperm motility, integrity of acrosome, and plasma membrane. J. Androl. 30, 75–86 (2009).
Google Scholar
Hirabayashi, M. et al. Offspring derived from intracytoplasmic injection of transgenic rat sperm. Transgenic Res. 11, 221–228 (2002).
Google Scholar
Said, S., Han, M. S. & Niwa, K. Development of rat oocytes following intracytoplasmic injection of sperm heads isolated from testicular and epididymal spermatozoa. Theriogenology 60, 359–369 (2003).
Google Scholar
Nakai, M. et al. Offspring derived from intracytoplasmic injection of sonicated rat sperm heads. J. Mamm. Ova Res. 22, 159–162 (2005).
Google Scholar
Kaneko, T., Kimura, S. & Nakagata, N. Offspring derived from oocytes injected with rat sperm, frozen or freeze-dried without cryoprotection. Theriogenology 68, 1017–1021 (2007).
Google Scholar
Nakagawa, Y. & Kaneko, T. Rapid and efficient production of genome-edited animals by electroporation into oocytes injected with frozen or freeze-dried sperm. Cryobiology 90, 71–74 (2019).
Google Scholar
Hirabayashi, M., Kato, M., Ito, J. & Hochi, S. Viable rat offspring derived from oocytes intracytoplasmically injected with freeze-dried sperm heads. Zygote 13, 79–85 (2005).
Google Scholar
Kaneko, T. & Serikawa, T. Successful long-term preservation of rat sperm by freeze-drying. PLoS ONE 7, e35043 (2012).
Google Scholar
Tripathi, A., Kumar, K. V. & Chaube, S. K. Meiotic cell cycle arrest in mammalian oocytes. J. Cell. Physiol. 223, 592–600 (2010).
Google Scholar
Keefer, C. L. & Schuetz, A. W. Spontaneous activation of ovulated rat oocytes during in vitro culture. J. Exp. Zool. 224, 371–377 (1982).
Google Scholar
Zernicka-Goetz, M. Spontaneous and induced activation of rat oocytes. Mol. Reprod. Dev. 28, 169–176 (1991).
Google Scholar
Chebotareva, T., Taylor, J., Mullins, J. J. & Wilmut, I. Rat eggs cannot wait: spontaneous exit from meiotic metaphase-II arrest. Mol. Reprod. Dev. 78, 798–807 (2011).
Google Scholar
Cui, W. Oocyte spontaneous activation: an overlooked cellular event that impairs female fertility in mammals. Front. Cell Dev. Biol. 9, 648057 (2021).
Google Scholar
Kato, M. et al. Strontium-induced activation regimen for rat oocytes in somatic cell nuclear transplantation. J. Reprod. Dev. 47, 407–413 (2001).
Google Scholar
Miyata, T. et al. Effect of oocyte preincubation and intra-ovarian bursa transfer on the development of oocytes following intracytoplasmic sperm injection in rats. J. Mamm. Ova Res. 24, 29–34 (2007).
Google Scholar
Josefsberg, L. B., Kaufman, O., Galiani, D., Kovo, M. & Dekel, N. Inactivation of M-phase promoting factor at exit from first embryonic mitosis in the rat is independent of cyclin B1 degradation. Biol. Reprod. 64, 871–878 (2001).
Google Scholar
Zhou, Q. et al. Generation of fertile cloned rats by regulating oocyte activation. Science 302, 1179 (2003).
Google Scholar
Ito, J. et al. Contribution of high p34cdc2 kinase activity to premature chromosome condensation of injected somatic cell nuclei in rat oocytes. Reproduction 129, 171–180 (2005).
Google Scholar
Nakajima, N., Inomata, T., Ito, J. & Kashiwazaki, N. Treatment with proteasome inhibitor MG132 during cloning improves survival and pronuclear number of reconstructed rat embryos. Cloning Stem Cells 10, 461–468 (2008).
Google Scholar
Toyoda, Y. & Chang, M. C. Fertilization of rat eggs in vitro by epididymal spermatozoa and the development of eggs following transfer. J. Reprod. Fertil. 36, 9–22 (1974).
Google Scholar
Ishibashi, I. Morphological studies on superovulated rat ova. II. Maturation and time of ovulation of oocytes in adult rats following gonadotrophin treatment. Jap. J. Anim. Reprod. 13, 109–114 (1967).
Google Scholar
Miao, Y. L., Kikuchi, K., Sun, Q. Y. & Schatten, H. Oocyte aging: cellular and molecular changes, developmental potential and reversal possibility. Hum. Reprod. Update 15, 573–585 (2009).
Google Scholar
Ross, P. J., Yabuuchi, A. & Cibelli, J. B. Oocyte spontaneous activation in different rat strains. Cloning Stem Cells 8, 275–282 (2006).
Google Scholar
Cui, W. et al. Roles of MAPK and spindle assembly checkpoint in spontaneous activation and MIII arrest of rat oocytes. PLoS ONE 7, e32044 (2012).
Google Scholar
Li, L., Zheng, P. & Dean, J. Maternal control of early mouse development. Development 137, 859–870 (2010).
Google Scholar
Mizumoto, S., Kato, Y. & Tsunoda, Y. The developmental potential of parthenogenetic and somatic cell nuclear-transferred rat oocytes in vitro. Cloning Stem Cells 10, 453–459 (2008).
Google Scholar
Sterthaus, O., Skoczylas, E., De Geyter, C., Bürki, K. & Ledermann, B. Evaluation of in vitro cultured rat oocytes, from different strains, by spindle morphology and maturation-promoting-factor activity combined with nuclear-transfer experiments. Cloning Stem Cells 11, 463–472 (2009).
Google Scholar
Kaneko, T., Kimura, S. & Nakagata, N. Importance of primary culture conditions for the development of rat ICSI embryos and long-term preservation of freeze-dried sperm. Cryobiology 58, 293–297 (2009).
Google Scholar
Miyoshi, K., Abeydeera, L. R., Okuda, K. & Niwa, K. Effects of osmolarity and amino acids in a chemically defined medium on development of rat one-cell embryos. J. Reprod. Fertil. 103, 27–32 (1995).
Google Scholar
Kaneko, T. Simple sperm preservation by freeze-drying for conserving animal strains. Methods Mol Biol. 1239, 317–329 (2015).
Google Scholar

