Production of Cloned Pigs by Handmade Cloning

Area of Science:

• Animal Biotechnology
• Reproductive Biology
• Developmental Biology

Background:

• Somatic cell nuclear transfer (SCNT) is crucial for transgenesis in pigs, supporting xenotransplantation and disease modeling.
• Handmade cloning (HMC) is a simplified SCNT technique that bypasses the need for micromanipulators, enabling large-scale cloned embryo production.

Purpose of the Study:

• To detail an optimized handmade cloning (HMC) protocol for efficient production of cloned pigs.
• To present a refined methodology for porcine SCNT tailored to oocyte and embryo requirements.

Main Methods:

• The study describes a micromanipulator-free handmade cloning (HMC) protocol for porcine somatic cell nuclear transfer.
• Protocol optimization focused on specific porcine oocyte and embryo biological requirements.

Main Results:

• The optimized HMC protocol achieved a blastocyst rate exceeding 40%.
• High pregnancy rates (80-90%) and substantial healthy offspring (6-7 per farrowing) were observed.
• Negligible losses and malformations were reported in the cloned piglets.

Conclusions:

• Handmade cloning (HMC) provides a highly efficient and practical method for generating cloned pigs.
• This protocol facilitates advancements in porcine transgenesis for xenotransplantation and disease modeling.
• The described HMC method is suitable for large-scale production of genetically identical pigs.