Human Reproduction, Vol. 16, No. 10, 2171-2176,
October 2001
© 2001 European Society of Human Reproduction and Embryology
Effect of retinoic acid on implantation and post-implantation development of mouse embryos in vitro
1 Department of Obstetrics and Gynecology, Chang Gung Memorial Hospital, Kaohsiung, Taiwan, 2 Chang Gung University School of Medicine and 3 Department of Obstetrics and Gynecology, UCLA School of Medicine, California, USA
BACKGROUND: This study was designed to examine the embryotoxic potential of retinoic acid (RA) at the blastocyst stage and during early post-implantation development of mouse embryos in vitro. METHODS AND RESULTS: All-trans retinoic acid (t-RA) was administered to ICR mice embryos at a dose level of 0, 0.001 µmol/l, 0.1 µmol/l and 10 µmol/l throughout in-vitro culture. A total of 404 embryos was randomly assigned to all different dose groups. The percentage of embryos in later stages of development changed depending upon the dose of RA used. Exposure to 10 µmol/l of t-RA at the blastocyst stage, implanted blastocyst stage or early oocyte stage was also found to cause different degrees of retardation of embryo development and embryo death. These findings demonstrate, for the first time, that RA exerts an adverse effect on embryo growth during the early post-implantation stages of development, in comparison with day 3 to day 8 of gestation in vivo. CONCLUSIONS: Although isotretinoin (13-cis-retinoic acid) is effective for the therapy of cystic acne and other dermatological disorders, retinoid treatment should be avoided at the early post-implantation stage of gestation.
Key words: implantation/in-vitro exposure/mouse embryo development/post-implantation/retinoic acid
4 To whom correspondence should be addressed at: Department of Obstetrics and Gynecology, Chang Gung Memorial Hospital, 123, Ta-Pei Road., Niao-Sung Hsiang, Kaohsiung County, Taiwan. E-mail: huangfj{at}seed.net.tw
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