Spindle checkpoint proteins control entry into anaphase and chromosome segregation. As a member of spindle checkpoint proteins, MAD2 takes a central role in the regulation of anaphase onset and genome integrity. Here, we used MAD2 siRNA transfection approach to study MAD2 functions during mouse oocyte meiotic maturation in vitro. Real-time PCR and laser scanning confocal microscopy showed that we successfully downregulated MAD2 transcript and protein expression. We further demonstrated that MAD2 downregulation resulted in a shortened duration of meiosis I and meiotic spindle abnormality, suggesting the function of MAD2 in mouse oocyte meiotic maturation. We also showed that MAD2 interference to some extent decreased GVBD rate, but increased apoptosis in mouse oocytes. In conclusion, our study shows that siRNA transfection is an effective tool to study MAD2 functions, and our results provide further evidence for the role of MAD2 as a spindle checkpoint protein in mouse oocytes.
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http://dx.doi.org/10.1002/mrd.20552 | DOI Listing |
Cell Biosci
December 2024
Assisted Reproduction Unit, Department of Obstetrics and Gynecology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, 310016, China.
Background: Oocyte maturation defect (OMD) and early embryonic arrest result in female infertility. Previous studies have linked biallelic mutations in the PATL2 gene to OMD, yet the underlying mechanism remains largely unknown.
Results: This study uncovers three novel mutations (c.
Fundam Res
November 2024
State Key Laboratory of Natural and Biomimetic Drugs, Department of Molecular and Cellular Pharmacology, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing 100191, China.
The approval of Epidiolex, an anti-epileptic drug containing cannabidiol (CBD) as its active component, has brought hope to patients with refractory epilepsy. However, the anti-seizure effect of full-spectrum hemp extract (HE), a CBD-enriched hemp oil, remains unclear. In this study, we investigated the anti-seizure effect of HE using drug-induced seizure models.
View Article and Find Full Text PDFF S Sci
December 2024
The Ronald O. Perelman and Claudia Cohen Center for Reproductive Medicine, Weill Cornell Medicine, New York, NY, 10021, USA. Electronic address:
Objective: To introduce an innovative non-contact method for denudation process of cumulus-oocyte complexes (COCs) for intracytoplasmic sperm injection (ICSI).
Design: We designed and fabricated novel acousto-hydrodynamic tweezers (AHT) to perform contactless denudation and tested them in mouse model. Cumulus removal efficiency, preimplantation development and live birth were assessed and compared to conventional manual pipetting denudation.
J Ovarian Res
December 2024
TCM Gynecology Department, Hangzhou Hospital of Traditional Chinese Medicine, NO.453 Ti Yuchang Road, Hangzhou, 310007, Zhejiang, China.
Objective: He Shi Yu Lin Formula (HSYLF) is a clinically proven prescription for treating premature ovarian insufficiency (POI), and has shown a good curative effect. However, its molecular mechanisms are unclear. This study aimed to investigate the molecular mechanisms of HSYLF and clarify how network pharmacology analysis guides the design of animal experiments, including the selection of effective treatment doses and key targets, to ensure the relevance of the experimental results.
View Article and Find Full Text PDFSci Rep
December 2024
Centre of Excellence in Clinical Embryology, Department of Reproductive Science, Kasturba Medical College, Manipal. Manipal Academy of Higher Education, Manipal, 576 104, India.
Cyclophosphamide (CY) exposure is known to affect the ovary and impair fertility. Clinically, treatment is generally given over multiple doses, but research models have generally used single doses. The relative effects of administering multiple small doses of CY in the prepubertal period are not elucidated.
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