Y box-binding protein 1 regulates zebrafish folliculogenesis partly through p21-mediated control of follicle cell proliferation
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View abstract on PubMed
Summary
This summary is machine-generated.Y box-binding protein 1 (Ybx1) is essential for zebrafish ovary development. Loss of Ybx1 disrupts follicle growth by increasing the cell cycle inhibitor p21, leading to infertility.
Area Of Science
- Reproductive Biology
- Developmental Biology
- Molecular Genetics
Background
- Y box-binding protein 1 (Ybx1) is a DNA/RNA-binding protein involved in gene regulation.
- Ybx1 is abundant in early zebrafish ovarian follicles but declines during secondary growth.
- The precise role of Ybx1 in folliculogenesis remains unclear.
Purpose Of The Study
- To investigate the function of Ybx1 in zebrafish folliculogenesis.
- To elucidate the molecular mechanisms underlying Ybx1's role in ovarian development.
Main Methods
- Generation of a ybx1 mutant zebrafish using TALEN.
- Analysis of ovarian morphology and follicle development in ybx1 mutants.
- Gene expression and Western blot analyses to identify differentially expressed genes.
- CRISPR/Cas9-mediated knockout of cdkn1a (p21) in ybx1 mutants.
Main Results
- Ybx1 deficiency disrupts folliculogenesis at the previtellogenic to early vitellogenic transition, causing underdeveloped ovaries and infertility.
- Ybx1 mutant ovaries exhibit significantly increased expression of the cell cycle inhibitor cdkn1a (p21).
- Partial loss of p21 in ybx1 mutants rescues folliculogenesis and restores normal follicle cell proliferation.
Conclusions
- Ybx1 is critical for early zebrafish folliculogenesis.
- Ybx1 likely represses cdkn1a (p21) expression, thereby promoting follicle cell proliferation and development.
- Targeting Ybx1 or p21 pathways may offer insights into reproductive health and infertility treatments.
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