MicroRNA-451 plays a role in murine embryo implantation through targeting Ankrd46, as implicated by a microarray-based analysis
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Updated: Sep 16, 2026
Chromatin Immunoprecipitation Assay for Tissue-specific Genes using Early-stage Mouse Embryos
Published on: April 29, 2011
Zhengyu Li1, Jia Jia2, Jinhai Gou2
1Department of Gynecology and Obstetrics, West China Second University Hospital, Sichuan University, Chengdu, People's Republic of China; Sichuan Key Laboratory of Gynecologic Oncology, West China Second University Hospital, Sichuan University, Chengdu, People's Republic of China.
Objective:
To determine the potential microRNA (miRNA) regulators of embryo implantation, as a continuation of genomic and proteomic research.
Design:
Laboratory animal research.
Setting:
University hospital laboratory.
Animal(S):
Adult healthy female C57BL6/J mice (age 6-8 weeks, nonfertile, weighing 18-20 g each).
Intervention(S):
Female mice were mated naturally with fertile males to produce pregnancy. Luminal epithelium was collected by laser-capture microdissection during the implantation period. Mouse models of pseudopregnancy, delayed implantation, and artificial decidualization were established.
Main Outcome Measure(S):
The miRNA profile in luminal epithelium was clarified by microarray analysis and validated by real-time reverse transcription polymerase chain reaction (qRT-PCR) in a series of models. Target genes were predicted and confirmed by luciferase activity assay. The role of miRNA in implantation was examined by loss-of-function and gain-of-function of miRNA in vitro and in vivo.
Result(S):
A total of 29 and 15 miRNAs were up- and down-regulated, respectively, during the implantation period; 11 of these miRNAs were validated by qRT-PCR. The profile of miR-451 was clarified in a series of models. A dual-luciferase activity assay showed that Ankrd46 was a target gene of miR-451. Loss-of-function by LV-miR-451 sponge or miR-451 inhibitor led to a reduced number of embryo implantations, but had little effect on fertilization.
Conclusion(S):
miR-451 was specifically up-regulated during the implantation period, and it may play a major role in embryo implantation by targeting Ankrd46.
Insights
MicroRNA (miRNA) regulators are crucial for embryo implantation. miR-451 is upregulated during implantation and targets Ankrd46, playing a key role in this process.
Area of Science:
- Reproductive biology
- Molecular genetics
- Genomics and proteomics
Background:
- Embryo implantation is a complex process critical for successful pregnancy.
- Understanding the molecular regulators of implantation is essential for addressing infertility.
- Previous genomic and proteomic research has laid the groundwork for identifying key regulatory molecules.
Purpose of the Study:
- To identify microRNA (miRNA) regulators involved in embryo implantation.
- To investigate the role of specific miRNAs and their target genes in the implantation process.
Main Methods:
- Laboratory animal research using C57BL6/J mice.
- Collection of luminal epithelium via laser-capture microdissection.
- Microarray analysis and quantitative real-time PCR (qRT-PCR) for miRNA profiling.
- Luciferase activity assays to confirm target genes.
- In vitro and in vivo loss-of-function and gain-of-function experiments.
Main Results:
- A total of 29 miRNAs were upregulated and 15 were downregulated during embryo implantation.
- miR-451 was significantly upregulated and its expression profile was characterized.
- Ankrd46 was identified as a direct target gene of miR-451.
- Inhibition of miR-451 reduced embryo implantation rates, without affecting fertilization.
Conclusions:
- miR-451 is specifically upregulated during the implantation period.
- miR-451 plays a significant role in embryo implantation, potentially by targeting Ankrd46.
- This study identifies miR-451 as a key regulator in the complex process of embryo implantation.
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