title: Development block of golden hamster ICSI embryos is associated with decreased expression of HDAC1, HSPA1A and MYC.
abstract: We have investigated the mechanism for embryo development block in vitro and to improve the development rate of golden hamster embryos in vitro. Intracytoplasmic sperm injection (ICSI) technique was used to produce golden hamster ICSI embryos. The changes in the histone acetylation and the expression of histone deacetylase and related genes were analyzed by immunocytochemical staining and real-time PCR both in golden hamster in vivo embryos and in ICSI embryos. Aged oocytes significantly increased the oocyte spontaneous activation rate. In vitro cultured ICSI embryos suffered from severe development block in M199TE medium. Expression of histone deacetylase 1 (HDAC1) was significantly decreased in the nuclei of the arrested ICSI 2-cell embryos, and its nuclear and cytoplasmic expression pattern was also markedly altered. The acetylation level of H4K5, however, was not significantly changed between golden hamster in vivo embryos and ICSI embryos. HSPA1A and MYC, the marker genes for zygotic genome activation (ZGA), were transcriptionally decreased in arrested ICSI 2-cell embryos. Transcription of HDAC1 was also downregulated in these embryos, whereas the mRNA expression of the proapoptotic gene, BAX, was not changed. These results indicate that the golden hamster ICSI embryo development block during ZGA is associated with decreased nuclear expression and altered expression of HDAC1. HSPA1A, MYC, and HDAC1 mRNA levels, which decrease, resulting in ZGA failure.
authors.affiliation: Jilin Provincial Key Laboratory of Animal Embryo Engineering, the Center for Animal Embryo Engineering of Jilin Province, College of Veterinary Medicine, Jilin University, Changchun, Jilin 130062, China; Department of Histology and Embryology, Jilin Medical College, Jilin, Jilin 132013, China.
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: Pan
authors.forename: Delong
authors.initials: D
authors.lastname: Kong
authors.forename: Limei
authors.initials: L
authors.lastname: Liu
authors.forename: Fei
authors.initials: F
authors.lastname: Gao
authors.forename: Xueming
authors.initials: X
authors.lastname: Zhang
authors.forename: Bo
authors.initials: B
authors.lastname: Tang
authors.forename: Ziyi
authors.initials: Z
authors.lastname: Li
mesh_terms: D000107:Acetylation; D000818:Animals; D002478:Cells, Cultured; D006224:Cricetinae; D003470:Culture Media / Q000494:pharmacology; D004622:Embryo, Mammalian / Q000166:cytology / Q000378:metabolism*; D047108:Embryonic Development / Q000187:drug effects; D005260:Female; D018840:HSP70 Heat-Shock Proteins / Q000235:genetics / Q000378:metabolism*; D056284:Histone Deacetylase 1 / Q000235:genetics / Q000378:metabolism*; D006657:Histones; D007150:Immunohistochemistry; D008297:Male; D009865:Oocytes / Q000166:cytology; D016271:Proto-Oncogene Proteins c-myc / Q000235:genetics / Q000378:metabolism*; D012333:RNA, Messenger / Q000378:metabolism; D020554:Sperm Injections, Intracytoplasmic; D051028:bcl-2-Associated X Protein / Q000235:genetics / Q000378:metabolism
chemical_list: D003470:Culture Media; D018840:HSP70 Heat-Shock Proteins; D006657:Histones; D016271:Proto-Oncogene Proteins c-myc; D012333:RNA, Messenger; D051028:bcl-2-Associated X Protein; D056284:Histone Deacetylase 1
keywords: HSPA1A; MYC; golden hamster; histone deacetylase 1; intracytoplasmic sperm injection