Abstract
Purpose
The effects of reciprocal transplantation of meiosis-II chromosomes between senescent and young mouse oocytes were evaluated based on pre- and post-implantation development ability of resultant embryos.
Methods
Karyoplasts including meiosis-II chromosomes of oocytes from senescent Rockefeller mouse/Ms-Rb(6, 15) females (10 to 12 months, age-related infertile mice) were transferred into cytoplasts of oocytes from young F1 females (3 to 5 months). Reconstructed oocytes were fertilized in vitro, and then the resultant embryos were cultured in vitro and transferred to recipient mice.
Results
The reconstructed oocytes that consisted of aged-karyoplasts and young-cytoplasts showed significantly improved embryonic development (from 23.2% to 30.0%) and development to term (from 6.3% to 27.1%, P < 0.05) as compared with the oocytes reconstructed from young-karyoplasts and aged-cytoplasts.
Conclusions
The present study showed successful rejuvenation for age-related infertility using transplantation of meiosis-II chromosomes in animal experimental models.
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Acknowledgement
This work was supported in part by a Grant-in-Aid for Scientific Research (No. 17580245) from the Ministry of Education, Culture, Sports, Science and Technology, Japan.
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Capsule Transplantation of meiosis-II chromosomes of senescent mouse oocytes into cytoplasts of young mouse oocytes improves subsequent embryonic and fetal development until birth.
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Mitsui, A., Yoshizawa, M., Matsumoto, H. et al. Improvement of embryonic development and production of offspring by transferring meiosis-II chromosomes of senescent mouse oocytes into cytoplasts of young mouse oocytes. J Assist Reprod Genet 26, 35–39 (2009). https://doi.org/10.1007/s10815-008-9282-6
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DOI: https://doi.org/10.1007/s10815-008-9282-6