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Updated: Jun 1, 2026
09:24
Preparation of Meiotic Chromosome Spreads from Mouse Oocytes for Assessment of Synapsis and Recombination
Published on: July 18, 2025
RBM46 promotes meiotic initiation during oogenesis.
Jiawei Li1, Jun Shen2, Yanqiu Ma1
1Department of Pediatric Laboratory, The Affiliated Children's Hospital of Jiangnan University (Wuxi Children's Hospital), Wuxi, 214023, China; Wuxi Key Laboratory of Genetic and Metabolic Diseases in Children, Wuxi, 214023, China.
Biochemical and Biophysical Research Communications
|May 30, 2026
Summary
RNA binding protein RBM46 is crucial for female germ cell development, regulating meiotic initiation. Its deficiency causes meiotic arrest and apoptosis by affecting Lin28a and Mga mRNA levels.
Area of Science:
- Reproductive Biology
- Molecular Genetics
- Developmental Biology
Background:
- RNA binding protein RBM46 is part of the MEIOC-YTHDC2 complex, regulating male meiosis.
- RBM46 is essential for embryonic oocyte development, but its role in female germ cells is unclear.
Purpose of the Study:
- To investigate the function and regulatory mechanisms of RBM46 in female germ cell meiosis.
- To identify the direct targets of RBM46 in embryonic ovaries.
Main Methods:
- Analysis of RBM46-deficient mouse ovaries.
- Transcriptomic profiling (RNA-Seq) of embryonic ovaries.
- Reporter assays in HEK293T cells to study mRNA degradation.
Main Results:
- RBM46 deficiency caused meiotic arrest at leptotene and germ cell apoptosis.
- Transcriptomic analysis revealed altered expression of key genes like Stra8 and Lin28a.
- RBM46, MEIOC, and YTHDC2 co-expression induced degradation of Lin28a and Mga reporter mRNAs.
- A specific RBM46-binding motif in Lin28a 3'UTR was essential for this repression.
Conclusions:
- RBM46 plays a critical role in female germ cell meiotic initiation.
- RBM46 directly targets Lin28a and Mga transcripts for degradation, controlling meiotic progression.
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