title: Comparing spatial expression dynamics of bovine blastocyst under three different procedures: in-vivo, in-vitro derived, and somatic cell nuclear transfer embryos.
abstract: There has been no work on spatiotemporal transcriptomic differences of blastocysts using in vivo- and in vitro-derived, and somatic cell nuclear transfer (SCNT) embryos. Here, we first compared the lineage-differentially transcriptomic profiles of in vivo- and in vitro-derived embryos by microarray analysis using divided into inner cell mass (ICM)-and trophectoderm (TE)-side samples, as well as those derived from SCNT in order to explore lineage-differentially expressed genes that are associated with preimplantation development in cattle. The transcriptomic profiles of the ICM-specific and TE-specific genes were similar between in vitro-derived embryos and in vivo-derived embryos, whereas SCNT embryos exhibited unusual lineage-differentially gene expression regulation at the blastocyst stage. The genes expressed in a spatiotemporal manner between developmentally normal in-vivo derived blastocysts and developmentally abnormal SCNT blastocysts might play critical roles for preimplantation development. Comparing spatial expression dynamics of bovine blastocyst under three different procedures revealed that CIITA was expressed in ICM-side samples of all the embryo types. CIITA is known as the master regulator of major histocompatibility complexes (MHC) class II genes that express in antigen-presenting cells but its biological function in preimplantation embryo is still unknown in mammals. Knockdown of CIITA expression in in vitro-derived embryos did not affect cleavage, but disrupted development of embryos into the blastocyst stage. These findings provide the novel transcriptomic information on blastocyst formation, raising the possibility that immune function-related gene directly plays important roles in bovine preimplantation development.
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Nagatomo
authors.forename: Hiroki
authors.initials: H
authors.lastname: Akizawa
authors.forename: Ayari
authors.initials: A
authors.lastname: Sada
authors.forename: Yasunori
authors.initials: Y
authors.lastname: Kishi
authors.forename: Ken-ichi
authors.initials: K
authors.lastname: Yamanaka
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Takuma
authors.forename: Keisuke
authors.initials: K
authors.lastname: Sasaki
authors.forename: Nobuhiko
authors.initials: N
authors.lastname: Yamauchi
authors.forename: Yojiro
authors.initials: Y
authors.lastname: Yanagawa
authors.forename: Masashi
authors.initials: M
authors.lastname: Nagano
authors.forename: Tomohiro
authors.initials: T
authors.lastname: Kono
authors.forename: Masashi
authors.initials: M
authors.lastname: Takahashi
authors.forename: Manabu
authors.initials: M
authors.lastname: Kawahara
mesh_terms: D000818:Animals; D001755:Blastocyst / Q000378:metabolism*; D002417:Cattle / Q000196:embryology*; D047108:Embryonic Development / Q000235:genetics; D005307:Fertilization in Vitro / Q000662:veterinary*; D018507:Gene Expression Regulation, Developmental / Q000502:physiology*; D053652:Nuclear Transfer Techniques / Q000662:veterinary*; D034622:RNA Interference; D020858:Tissue and Organ Harvesting / Q000662:veterinary; D059467:Transcriptome