METTL7A improves bovine IVF embryo competence by attenuating oxidative stress

Area of Science:

• Reproductive Biology
• Molecular Biology
• Developmental Biology

Background:

• Assisted reproductive technologies like in vitro fertilization (IVF) aim to achieve pregnancy.
• Oxidative stress during in vitro embryo culture compromises embryo quality and developmental potential.
• Identifying factors that mitigate oxidative stress is crucial for improving IVF success rates.

Purpose of the Study:

• To investigate the role of methyltransferase-like protein 7A (METTL7A) in improving bovine embryo development under oxidative stress conditions.
• To elucidate the molecular mechanisms by which METTL7A influences embryonic mitochondrial function and stress response.
• To assess the potential of METTL7A as a therapeutic target for enhancing IVF embryo competence.

Main Methods:

• Overexpression of the nuclear coding gene METTL7A in bovine embryos.
• Analysis of gene expression related to mitochondrial pathways.
• Assessment of mitochondrial stress markers and DNA damage.
• Evaluation of embryo development and cell cycle progression.

Main Results:

• Exogenous METTL7A significantly improved the developmental potential of bovine embryos.
• METTL7A modulated the expression of genes involved in embryonic mitochondrial pathways.
• METTL7A alleviated mitochondrial stress and DNA damage in cultured embryos.
• METTL7A promoted cell cycle progression during embryo cleavage stages.

Conclusions:

• METTL7A plays a critical role in mitigating oxidative stress during in vitro embryo culture.
• METTL7A functions through a novel mechanism to eliminate mitochondrial stress in developing embryos.
• METTL7A represents a promising therapeutic target for enhancing the competence of IVF embryos.