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Production of mouse offspring from zygotes fertilized with freeze-dried spermatids

Mouse cloning by nuclear transfer using freeze-drying (FD) somatic cells is now possible, but the success rate is significantly lower than that of FD spermatozoa. Because spermatozoa, unlike somatic cells, are haploid cells with hardened nuclei due to protamine, the factors responsible for their tol...

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Autores principales: Wakayama, Sayaka, Ito, Daiyu, Ooga, Masatoshi, Wakayama, Teruhiko
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9626645/
https://www.ncbi.nlm.nih.gov/pubmed/36319672
http://dx.doi.org/10.1038/s41598-022-22850-5
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author Wakayama, Sayaka
Ito, Daiyu
Ooga, Masatoshi
Wakayama, Teruhiko
author_facet Wakayama, Sayaka
Ito, Daiyu
Ooga, Masatoshi
Wakayama, Teruhiko
author_sort Wakayama, Sayaka
collection PubMed
description Mouse cloning by nuclear transfer using freeze-drying (FD) somatic cells is now possible, but the success rate is significantly lower than that of FD spermatozoa. Because spermatozoa, unlike somatic cells, are haploid cells with hardened nuclei due to protamine, the factors responsible for their tolerance to FD treatment remain unclear. In this study, we attempt to produce offspring from FD spermatid, a haploid sperm progenitor cell whose nuclei, like somatic cells, have not yet been replaced by protamine. We developed a method for collecting FD spermatids from testicular suspension. Despite the significantly lower success rate than that of FD spermatozoa, healthy offspring were obtained when FD spermatids were injected into oocytes. Offspring were also obtained from FD spermatids derived from immature male mice that had not yet produced spermatozoa. These results suggest that nuclear protaminization, rather than haploid nuclei, is one of the key processes responsible for tolerance to FD treatment.
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spelling pubmed-96266452022-11-03 Production of mouse offspring from zygotes fertilized with freeze-dried spermatids Wakayama, Sayaka Ito, Daiyu Ooga, Masatoshi Wakayama, Teruhiko Sci Rep Article Mouse cloning by nuclear transfer using freeze-drying (FD) somatic cells is now possible, but the success rate is significantly lower than that of FD spermatozoa. Because spermatozoa, unlike somatic cells, are haploid cells with hardened nuclei due to protamine, the factors responsible for their tolerance to FD treatment remain unclear. In this study, we attempt to produce offspring from FD spermatid, a haploid sperm progenitor cell whose nuclei, like somatic cells, have not yet been replaced by protamine. We developed a method for collecting FD spermatids from testicular suspension. Despite the significantly lower success rate than that of FD spermatozoa, healthy offspring were obtained when FD spermatids were injected into oocytes. Offspring were also obtained from FD spermatids derived from immature male mice that had not yet produced spermatozoa. These results suggest that nuclear protaminization, rather than haploid nuclei, is one of the key processes responsible for tolerance to FD treatment. Nature Publishing Group UK 2022-11-01 /pmc/articles/PMC9626645/ /pubmed/36319672 http://dx.doi.org/10.1038/s41598-022-22850-5 Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Wakayama, Sayaka
Ito, Daiyu
Ooga, Masatoshi
Wakayama, Teruhiko
Production of mouse offspring from zygotes fertilized with freeze-dried spermatids
title Production of mouse offspring from zygotes fertilized with freeze-dried spermatids
title_full Production of mouse offspring from zygotes fertilized with freeze-dried spermatids
title_fullStr Production of mouse offspring from zygotes fertilized with freeze-dried spermatids
title_full_unstemmed Production of mouse offspring from zygotes fertilized with freeze-dried spermatids
title_short Production of mouse offspring from zygotes fertilized with freeze-dried spermatids
title_sort production of mouse offspring from zygotes fertilized with freeze-dried spermatids
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9626645/
https://www.ncbi.nlm.nih.gov/pubmed/36319672
http://dx.doi.org/10.1038/s41598-022-22850-5
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