Abstract
Purpose
Infertility remains a human health burden globally. Only a fraction of embryos produced via assisted reproductive technologies (ARTs) develop to the blastocyst stage in vitro. lncRNA abundance changes significantly during human early embryonic development, indicating vital regulatory roles of lncRNAs in this process. The aim of this study is to obtain insights into the transcriptional basis of developmental events.
Methods
scRNA-seq data and SUPeR-seq data were used to investigate the lncRNA profiles of human preimplantation embryos. The top 50 highly expressed unique and shared lncRNAs in each stage of preimplantation development were identified. Comparative analysis of the two datasets was used to verify the consistent expression patterns of the lncRNAs. Differentially expressed lncRNAs were identified and subjected to functional enrichment analysis.
Results
The lncRNA profiles of human preimplantation embryos in the E-MTAB-3929 dataset were similar to those in the GSE71318 dataset. The ratios of overlap among the top 50 highly expressed lncRNAs between two pairs of stages (2-cell stage vs. 4-cell stage and 8-cell stage vs. morula) were aberrantly low compared with those between other stages. Each stage of preimplantation development exhibited unique and shared lncRNAs among the top 50 highly expressed lncRNAs. Among the between-group comparisons, the 2-cell stage vs. 4-cell stage showed the highest number of differentially expressed lncRNAs. Functional enrichment analysis revealed that differentially expressed lncRNAs and their associated super enhancers and RNA binding proteins (RBPs) are closely involved in regulating embryonic development. These lncRNAs could function as important cell markers for distinguishing fetal germ cells.
Conclusions
Our study paves the way for understanding the regulation of developmental events, which might be beneficial for improved reproductive outcomes.
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Data availability
All data generated or analyzed during this study are included in this published article and its supplementary information files.
Abbreviations
- ARTs :
-
Assisted reproductive technologies
- RBPs :
-
RNA binding proteins
- 2PN :
-
Two-pronuclear
- TE :
-
Trophectoderm cells
- ICM :
-
The inner cell mass
- lncRNAs :
-
Long noncoding RNAs
- MZT :
-
Maternal-to-zygotic transition
- ZGA :
-
Zygotic gene activation
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Funding
This work was supported by the Natural Science Foundation of Inner Mongolia (2020BS08002); Startup Foundation for Advanced Talents of Inner Mongolia; Program for Young Talents of Science and Technology in Universities of Inner Mongolia Autonomous Region (NJYT22014); and the Doctoral Scientific Research Foundation of the Affiliated Hospital of Inner Mongolia Medical University (NYFY BS 202111).
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XC and LZ generated the hypothesis and designed the study. LZ and HS interpreted data and prepared figures. LZ and HS prepared the first draft of the manuscript. LZ edited and prepared the final draft of the manuscript. LZ supervised the secured funding. XC supervised the overall research and interpreted results. All authors read and approved the final manuscript.
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Zhang, L., Sun, H. & Chen, X. Characterization of the long noncoding RNA transcriptome in human preimplantation embryo development. J Assist Reprod Genet 40, 2913–2923 (2023). https://doi.org/10.1007/s10815-023-02951-4
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DOI: https://doi.org/10.1007/s10815-023-02951-4