Overcoming Barriers in Porcine SCNT: A Comprehensive Review of Developmental Challenges and Innovations

Area of Science:

• Reproductive Biology
• Developmental Biology
• Genetics

Background:

• Porcine somatic cell nuclear transfer (SCNT) is vital for biomedical research, agriculture, and xenotransplantation.
• SCNT-derived embryos have lower developmental potential and higher abnormality rates than in vivo fertilized embryos, limiting applications.
• Defects stem from incomplete epigenetic reprogramming, telomere issues, mitochondrial dysfunction, and technical damage.

Purpose of the Study:

• To critically review porcine SCNT research, linking biological mechanisms to developmental defects.
• To establish a conceptual framework for understanding and improving SCNT embryo development.
• To highlight pig-specific factors influencing SCNT outcomes.

Main Methods:

• Integrated literature review of porcine SCNT studies.
• Analysis of biological mechanisms underlying developmental anomalies.
• Evaluation of diagnostic and therapeutic strategies.

Main Results:

• Incomplete epigenetic reprogramming is the primary barrier to successful porcine SCNT.
• Multiple factors interact to disrupt gene expression and embryonic lineage commitment.
• Existing diagnostic and therapeutic approaches have limitations.

Conclusions:

• Understanding the interplay of epigenetic, mitochondrial, and technical factors is crucial for advancing porcine SCNT.
• Addressing pig-specific biological features is key to overcoming developmental barriers.
• Further research is needed to refine SCNT techniques and improve embryo development for practical applications.