ArticleBMC genomics2024
Molecular cloning of PRD-like homeobox genes expressed in bovine oocytes and early IVF embryos.
Article in BMC genomics, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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3 citing papers in PubMed.
- RNA sequencing of mRNA 5'-ends reveals regulators of bovine embryonic genome activation.BMC genomics · 2025Article
- Review
- Oxygen level alters energy metabolism in bovine preimplantation embryos.Scientific reports · 2025Article
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13 authors.
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Abstract
backgroundEmbryonic genome activation (EGA) is a critical step in early embryonic development, as it marks the transition from relying on maternal factors to the initiation of transcription from embryo's own genome. The factors associated with EGA are not well understood and need further investigation. PRD-like (PRDL) homeodomain transcription factors (TFs) are considered to play crucial roles in this early event during development but these TFs have evolved differently, even within mammalian lineages. Different numbers of PRDL TFs have been predicted in bovine (Bos taurus); however, their divergent evolution requires species-specific confirmation and functional investigations.
resultsIn this study, we conducted molecular cloning of mRNAs for the PRDL TFs ARGFX, DUXA, LEUTX, NOBOX, TPRX1, TPRX2, and TPRX3 in bovine oocytes or in vitro fertilized (IVF) preimplantation embryos. Our results confirmed the expression of PRDL TF genes in early bovine development at the cDNA level and uncovered their structures. For each investigated PRDL TF gene, we isolated at least one homeodomain-encoding cDNA fragment, indicative of DNA binding and thus potential role in transcriptional regulation in developing bovine embryos. Additionally, our cDNA cloning approach allowed us to reveal breed-related differences in bovine, as evidenced by the identification of a high number of single nucleotide variants (SNVs) across the PRDL class homeobox genes. Subsequently, we observed the prediction of the 9aa transactivation domain (9aaTAD) motif in the putative protein sequence of TPRX3 leading us to conduct functional analysis of this gene. We demonstrated that the TPRX3 overexpression in bovine fibroblast induces not only protein-coding genes but also short noncoding RNAs involved in splicing and RNA editing. We supported this finding by identifying a shared set of genes between our and published bovine early embryo development datasets.
conclusionsProviding full-length cDNA evidence for previously predicted homeobox genes that belong to PRDL class improves the annotation of the bovine genome. Updating the annotation with seven developmentally-important genes will enhance the accuracy of RNAseq analysis with datasets derived from bovine preimplantation embryos. In addition, the absence of TPRX3 in humans highlights the species-specific and TF-specific regulation of biological processes during early embryo development.
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