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Preparation of Small RNA Libraries for Sequencing from Early Mouse Embryos
Published on: October 9, 2020
Determination of microRNAs in mouse preimplantation embryos by microarray
Yanhong Yang1, Wentao Bai, Liang Zhang
1Department of Obstetrics & Gynaecology, Tangdu Hospital, the Fourth Military Medical University, Xi'an, China.
Summary
This study reveals microRNA (miRNA) expression profiles in mouse embryos using high-throughput assays. miRNA quantity and stage-dependent expression increase during preimplantation development, suggesting dynamic roles in early embryogenesis.
Area of Science:
- Developmental Biology
- Genetics
- Molecular Biology
Background:
- MicroRNAs (miRNAs) are crucial regulators of gene expression.
- Understanding miRNA dynamics during early embryonic development is essential for reproductive biology.
- Previous studies have limited comprehensive profiling of miRNAs in preimplantation mouse embryos.
Purpose of the Study:
- To profile microRNA (miRNA) expression in mouse oocytes and preimplantation embryos.
- To identify novel and known miRNAs and classify their expression patterns.
- To investigate the functional implications of stage-dependent and non-stage-dependent miRNAs.
Main Methods:
- High-throughput microarray assay for miRNA expression profiling.
- Bioinformatic analysis including TargetsScan and PANTHER classification system.
- Reverse transcriptase-polymerase chain reaction (RT-PCR) for expression validation.
Main Results:
- Discovery of 97 miRNAs (43 novel, 54 known) in preimplantation mouse embryos.
- Classification of miRNAs into developmental stage-dependent and non-stage-dependent groups.
- Identification of significantly altered signaling pathways and biological processes associated with miRNA targets.
- Confirmation of dynamic miRNA synthesis and degradation, with increasing overall miRNA quantity and stage-dependent miRNA percentage during development.
Conclusions:
- Dynamic synthesis and degradation of miRNAs occur during mouse preimplantation development.
- The overall quantity and proportion of stage-dependent miRNAs increase with embryonic development.
- These findings highlight the significant and evolving role of miRNAs in regulating early mouse embryogenesis.
