title: Associations among Sebox and other MEGs and its effects on early embryogenesis.
abstract: In a previous report, we identified Sebox as a new candidate maternal effect gene that is essential for embryonic development and primarily impacts the two-cell (2C) stage. The present study was conducted to determine the mechanism of action for Sebox in this capacity, as shown by changes in the expression levels of other known MEG mRNAs after Sebox RNA interference (RNAi) in oocytes. Sebox-knockdown metaphase II (Mll) oocytes displayed normal morphology, but among the 23 MEGs monitored, 8 genes were upregulated, and 15 genes were unchanged. We hypothesized that the perturbed gene expression of these MEGs may cause the arrest of embryo development at the 2C stage and examined the expression of several marker genes for the degradation of maternal factors and zygotic genome activation. We found that some maternal mRNAs, c-mos, Gbx2, and Gdf9, were not fully degraded in Sebox-knockdown 2C embryos, and that several zygotic genome activation markers, Mt1a, Rpl23, Ube2a and Wee1, were not fully expressed in conjunction with diminished embryonic transcriptional activity. In addition, Sebox may be involved in the formation of the subcortical maternal complex through its regulation of the upstream regulator, Figla. Therefore, we concluded that Sebox is important in preparing oocytes for embryonic development by orchestrating the expression of other important MEGs.
authors: Department of Biomedical Science, College of Life Science, CHA University, Pangyo-Ro 335, Bundang-gu, Seongnam-si, Gyeonggi-do, 463-400, Korea.
authors: Min-Woo
authors: MW
authors: Park
authors: Department of Biomedical Science, College of Life Science, CHA University, Pangyo-Ro 335, Bundang-gu, Seongnam-si, Gyeonggi-do, 463-400, Korea.
authors: Kyeoung-Hwa
authors: KH
authors: Kim
authors: Department of Biomedical Science, College of Life Science, CHA University, Pangyo-Ro 335, Bundang-gu, Seongnam-si, Gyeonggi-do, 463-400, Korea.
authors: Eun-Young
authors: EY
authors: Kim
authors: Department of Biomedical Science, College of Life Science, CHA University, Pangyo-Ro 335, Bundang-gu, Seongnam-si, Gyeonggi-do, 463-400, Korea.
authors: Su-Yeon
authors: SY
authors: Lee
authors: Department of Biomedical Science, College of Life Science, CHA University, Pangyo-Ro 335, Bundang-gu, Seongnam-si, Gyeonggi-do, 463-400, Korea.
authors: Jung-Jae
authors: JJ
authors: Ko
authors: Department of Biomedical Science, College of Life Science, CHA University, Pangyo-Ro 335, Bundang-gu, Seongnam-si, Gyeonggi-do, 463-400, Korea.
authors: Kyung-Ah
authors: KA
authors: Lee
mesh_terms: D000818:Animals; D051792:Basic Helix-Loop-Helix Proteins / Q000235:genetics; D004527:Egg Proteins / Q000235:genetics*; D047108:Embryonic Development; D005260:Female; D018507:Gene Expression Regulation, Developmental; D055785:Gene Knockdown Techniques; D005819:Genetic Markers / Q000235:genetics; D023281:Genomics; D018398:Homeodomain Proteins / Q000235:genetics / Q000378:metabolism*; D008297:Male; D051379:Mice; D008813:Mice, Inbred ICR; D011247:Pregnancy; D034622:RNA Interference; D020871:RNA Stability; D012333:RNA, Messenger / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D014158:Transcription, Genetic; D015053:Zygote / Q000378:metabolism
chemical_list: D051792:Basic Helix-Loop-Helix Proteins; D004527:Egg Proteins; D005819:Genetic Markers; D018398:Homeodomain Proteins; D012333:RNA, Messenger; C109920:Figla protein, mouse; C485871:Og9x protein, mouse