Abstract
Uterine fluid (UF) extracellular vesicle (EV) miRNA may affect implantation and could be the potential biomarker of endometrial receptivity (ER). Ovarian stimulation (OS) could damage the ER but its mechanism is still unclear. Here, we evaluate the affections of OS on UF EV miRNA expression and implantation. Female rats were divided into three groups: natural cycle or injection with GnRH-a following HP-HMG or u-FSH. UF was collected on the 5th day of gestation. Affinity membrane columns were utilized to isolate EVs from UF, obtained during implantation flushing. The EV miRNAs were sequenced, and five of them were validated by qRT-PCR. HTR-8/Svneo cells were transfected with miR-223-3p mimic and inhibitor, followed by conducting colony formation, invasion, migration, and adhesion assays to assess the cellular functions. In OS groups, the implantation rate decreased (p < 0.05), and the pinopode was damaged in the OS groups. The EVs were isolated from UF, and the differential expression key miRNAs were involved in several regulation pathways, such as cancer, endocrine, and cell cycles, which were correlated with ER and implantation. Among the miRNAs, miR-223-5p greatly differed and was most consistent with the sequencing results, followed by miR-223-3p and miR-98-5P. miR-223-3p promoted HTR-8/SVneo cells grow and ability of invasion, migration, and adhesion. OS altered UF EVs miRNAs affecting implantation in rats, and miR-223-3p might be the key molecule.
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Data Availability
The original data presented in the study are included in the article/supplementary material. Further inquiries can be directed to the corresponding authors.
Abbreviations
- ART:
-
Artificial reproduction technology
- ER:
-
Endometrial receptivity
- WOI:
-
Window of implantation
- OS:
-
Ovarian stimulation
- UF:
-
Uterine fluid
- EV:
-
Extracellular vesicles
- MV:
-
Microvesicles
- SD rat:
-
Sprague–Dawley rat
- TEM:
-
Transmission electron microscopy
- DLS:
-
Dynamic light scattering
- qRT-PCR:
-
Quantitative reverse transcription–polymerase chain reaction
- GnRH-a:
-
Gonadotropin-releasing hormone agonist
- HP-hMG:
-
High-purity human menopausal gonadotropin
- U-FSH:
-
Urine follicle stimulation hormone
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Acknowledgements
The authors appreciate the technical expertise of the team led by Professor Wu of the Lab of Biomedical Electronic Microscopy Higher Research Center, Central South University, Central South University. We would also like to thank everyone in the Reproductive Medicine Center, Xiangya Hospital, Central South University, Changsha, Hunan, People’s Republic of China, for their kind help and encouragement.
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Y.L. was involved in study concept and supervised the project. X. H. was involved in study design, performing all experiments, data analysis, and writing manuscript. L. X. was involved in experiments. J. Z., Q. Z., and Y. W. provided experiments guide and revised manuscript and figures. All the authors listed have approved the manuscript that is enclosed and agreed to the order of authors.
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All experiments were approved by the Institutional Animal Care and Use Committee of Central South University (animal ethics number: 2020sydw0136) and were conducted in accordance with the National Institute for Health Guide for Care and Use of Laboratory Animal.
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Huang, X., Zhao, J., Zhang, Q. et al. Ovarian Stimulation Altered Uterine Fluid Extracellular Vesicles miRNA Affecting Implantation in Rats. Reprod. Sci. (2024). https://doi.org/10.1007/s43032-023-01448-w
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DOI: https://doi.org/10.1007/s43032-023-01448-w