Efficient Method for Liposome-Based Gene Transfer in Cattle Embryos.

Abstract

In vitro embryo production (IVP) in cattle is crucial for advancing genetic enhancement and preserving valuable genetic lineages, enabling precise genetic modifications and gene studies through modern techniques. Successful genetic manipulation in cattle embryos requires efficient delivery of exogenous DNA/RNA molecules. This research investigates the efficacy of a single embryo culture system for developing genetically modified zona-free (ZF) embryos and examines the use of liposome-based SAMTOR target siRNA transfer in these individually cultured ZF embryos. The findings indicated that the individual culture system resulted in increased cleavage rates, and blastocyst rates were minimally impacted. The new culture system effectively achieved SAMTOR silencing, with 8-16 cell embryos exhibiting reduction in transcript levels compared to control. Measurement of total protein content in the spent culture media was performed to validate the single-culture approach for further analytical applications. Total protein content analysis demonstrated the system's suitability for comprehensive evaluation of the embryo-media interaction, enhancing the scope for in-depth genetic research and applications. This research sheds light into an innovative method to improve genetic editing techniques in reproduction research.