Trophectoderm regeneration to support full-term development in the inner cell mass isolated from bovine blastocyst
抄録
Which comes first: tissue structure or cell differentiation? While different cell types establish distinct structures delineating the in- and outside of an embryo, they progressively become specified by the blastocyst stage, when two types of cell lineages are formed: inner cell mass (ICM) and trophectoderm (TE). This inside-outside aspect can be experimentally converted by the isolation of the ICM from a blastocyst, leading to a posteriori externalization of the blastomeres composing the outermost layer of the ICM. Here, we investigated the totipotency of isolated mouse and bovine ICMs to determine whether they are competent for TE regeneration. Surprisingly, a calf was generated from the bovine isolated ICM with re-formed blastocoel (re-iICM), but no mouse re-iICMs developed to term. To further explore the cause of difference in developmental competency between the mouse and bovine re-iICMs, we investigated the SOX17 protein expression that is a representative molecular marker of primitive endoderm. The localization pattern of SOX17 was totally different between mouse and bovine embryos. Particularly, the ectopic SOX17 localization in the TE might be associated with lethality of mouse re-iICMs. Meanwhile, transcriptome sequencing revealed that some of the bovine re-iICMs showed transcriptional patterns of TE-specific genes similar to those of whole blastocysts. Our findings suggest that TE regeneration competency is maintained longer in bovine ICMs than in mouse ICMs and provide evidence that the ICM/TE cell fate decision is influenced by structural determinants, including positional information of each blastomere in mammalian embryos.
収録刊行物
-
- Journal of Biological Chemistry (JBC)
-
Journal of Biological Chemistry (JBC) 294 (50), 19209-19223, 2019-12-13
American Society for Biochemistry and Molecular Biology (ASBMB)
- Tweet
キーワード
詳細情報 詳細情報について
-
- CRID
- 1050569015533517312
-
- NII論文ID
- 120006940625
-
- HANDLE
- 2115/79970
-
- ISSN
- 00219258
-
- 本文言語コード
- en
-
- 資料種別
- journal article
-
- データソース種別
-
- IRDB
- Crossref
- CiNii Articles
- KAKEN