Epigenetic Characteristics of Paternal Chromatin in Interspecies Zygotes
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- BARNETOVA Irena
- Institute of Animal Science Center for Cell Therapy and Tissue Repair
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- FULKA Helena
- Institute of Animal Science Center for Cell Therapy and Tissue Repair
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- FULKA, JR Josef
- Institute of Animal Science Center for Cell Therapy and Tissue Repair
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Both the sperm and oocyte are terminally differentiated cells, but within a very short post-fertilization period, their genomes are converted into a totipotent zygote. The process of this transformation has been studied in a number of mammals as well as in the pig, for which very inconsistent results have been published. To clarify these inconsistencies, we have used the interspecies intracytoplasmic sperm injection technique for embryo production and subsequent paternal genome remodeling evaluation. First, we injected boar sperm heads into ovulated and in vitro matured mouse oocytes. The boar spermatozoa consistently decondense in ovulated oocytes and form fully developed pronuclei with demethylated DNA (5-methylcytosine; 5-MeC). Additional labeling against other histone modifications (H3/K9 dimethylation, H3/K4 trimethylation) and HP1 (Heterochromatin Protein 1) revealed similarity to those changes that are typical for natural mouse zygotes. On the other hand, no decondensation and formation of male pronuclei were observed, in spite of obvious oocyte activation, in in vitro matured oocytes. For this reason, we have evaluated the reprogramming parameters of in vitro matured mouse oocytes in more detail. In mouse zygotes (intraspecific), both pronuclei were consistently formed, but no sperm head chromatin demethylation was detected after 5-MeC labeling. Our observations suggest that porcine sperm heads are capable of undergoing active demethylation in in vivo matured mouse oocytes. On the other hand, in vitro matured oocytes possess much lower sperm remodeling capabilities. <br>
収録刊行物
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- Journal of Reproduction and Development
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Journal of Reproduction and Development 56 (6), 601-606, 2010
公益社団法人 日本繁殖生物学会
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詳細情報 詳細情報について
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- CRID
- 1390001206334976384
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- NII論文ID
- 10027730141
- 130000305987
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- NII書誌ID
- AA10936678
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- ISSN
- 13484400
- 09168818
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- NDL書誌ID
- 10931140
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 使用不可