NDLI: Regulation of embryonic size in early mouse development in vitro culture system.

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Regulation of embryonic size in early mouse development in vitro culture system.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Hisaki, Tomoka Kawai, Ikuma Sugiura, Koji Naito, Kunihiko Kano, Kiyoshi
Description	Country affiliation: Japan Author Affiliation: Hisaki T ( Laboratory of Applied Genetics,Graduate School of Agricultural and Life Science,University of Tokyo,Tokyo 113-8657,Japan.); Kawai I ( Laboratory of Applied Genetics,Graduate School of Agricultural and Life Science,University of Tokyo,Tokyo 113-8657,Japan.); Sugiura K ( Laboratory of Applied Genetics,Graduate School of Agricultural and Life Science,University of Tokyo,Tokyo 113-8657,Japan.); Naito K ( Laboratory of Applied Genetics,Graduate School of Agricultural and Life Science,University of Tokyo,Tokyo 113-8657,Japan.); Kano K ( Laboratory of Developmental Biology,Joint-Faculty of Veterinary Medicine,Yamaguchi University,Yamaguchi 753-8515,Japan.)
Abstract	Mammals self-regulate their body size throughout development. In the uterus, embryos are properly regulated to be a specific size at birth. Previously, size and cell number in aggregated embryos, which were made from two or more morulae, and half embryos, which were halved at the 2-cell stage, have been analysed in vivo in preimplantation and post-implantation development in mice. Here, we examined whether or not the mouse embryo has the capacity to self-regulate growth using an in vitro culture system. To elucidate embryonic histology, cells were counted in aggregated or half embryos in comparison with control embryos. Both double- and triple-aggregated embryos contained more cells than did control embryos during all culture periods, and the relative growth ratios showed no growth inhibition in an in vitro culture system. Meanwhile, half embryos contained fewer cells than control embryos, but the number grew throughout the culture period. Our data suggest that the growth of aggregated embryos is not affected and continues in an in vitro culture system. On the other hand, the growth of half embryos accelerates and continues in an in vitro culture system. This situation, in turn, implied that post-implantation mouse embryos might have some potential to regulate their own growth and size as seen by using an in vitro culture system without uterus factors. In conclusion, our results indicated that embryos have some ways in which to regulate their own size in mouse early development.
File Format	HTM / HTML
ISSN	09671994
Issue Number	3
Volume Number	22
e-ISSN	14698730
Journal	Zygote
Language	English
Publisher	Cambridge University Press
Publisher Date	2014-08-01
Publisher Place	Great Britain (UK)
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Embryology Embryo, Mammalian Cytology Physiology Animals Blastocyst Embryo Culture Techniques Embryonic Development Female Male Mice, Inbred Strains Morula Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Cell Biology Developmental Biology

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