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Microinjection of Medaka Embryos for use as a Model Genetic Organism
Published on: December 22, 2010
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Mep50 is essential for embryonic development in medaka fish
Qiting Yao1, Shi Duan1, Qing Yang1
1Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan 430079, China.
Gene
|March 24, 2023
Summary
The study found that Mep50 is crucial for medaka embryonic development. Disrupting Mep50 leads to non-viable offspring, increased apoptosis, and altered stem cell gene expression, highlighting Mep50
Area of Science:
- Developmental Biology
- Genetics
- Molecular Biology
Background:
- Mep50 partners with Prmt5, enhancing its activity and substrate affinity.
- Both Prmt5 and Mep50 are essential for stem cell maintenance and mammalian embryogenesis.
- The specific role of Mep50 in fish embryonic development remains largely unexplored.
Purpose of the Study:
- To investigate the function of Mep50 during embryonic development in medaka.
- To elucidate the consequences of Mep50 disruption on medaka embryogenesis.
Main Methods:
- Medaka mep50 gene was mutated using CRISPR-Cas9 genome editing technology.
- Generated homozygous mutants with deletions in mep50, leading to premature translation termination.
- Assessed embryonic viability, apoptosis levels (TUNEL assay), and gene expression (Quantitative RT-PCR for oct4, sox2, p53).
Main Results:
- Homozygous mep50 mutants produced non-viable offspring.
- Mutant embryos exhibited significantly increased apoptosis compared to wild-type embryos.
- Downregulation of stem cell markers (oct4, sox2) and upregulation of p53 were observed in mutant embryos.
Conclusions:
- Mep50 is essential for successful medaka embryonic development.
- Disruption of Mep50 severely impairs embryogenesis, likely by affecting stem cell maintenance and apoptosis regulation.
- Mep50 plays a critical role in maintaining stem cells and repressing apoptosis during medaka development.
