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Updated: May 5, 2026

In Vivo Gene Delivery into Mouse Mammary Epithelial Cells Through Mammary Intraductal Injection
Published on: February 10, 2023
PhiC31 integrase-mediated genomic integration and stable gene expression in the mouse mammary gland after gene
Background:
PhiC31 integrase is capable of conferring long-term transgene expression in various transfected tissues in vivo. In the present study, we investigated the activity of phiC31 integrase in mouse mammary glands.
Methods:
The normal mouse mammary epithelial cell line HC11 was transfected with FuGENE® HD Transfection Reagent (Roche Diagnostics, Shanghai, China). Transfection of the mouse mammary gland in vivo was performed by electrotransfer. Transgene expression was detected by western blotting and an enzyme-linked immunosorbent assay. Genomic integration and integration at mpsL1 was confirmed by a nested polymerase chain reaction.
Results:
An optimal electrotransfer protocol for the lactating mouse mammary gland was attained through investigation of different voltages and pulse durations. PhiC31 integrase mediated site-specific transgene integration in HC11 cells and the mouse mammary gland. In addition, the site-specific integration occurred efficiently at the ‘hot spot’ mpsL1. Co-delivery of PhiC31 integrase enhanced and prolonged transgene expression in the mouse mammary gland.
Conclusions:
The results obtained in the present study show that the use of phiC31 integrase is a feasible and efficient method for high and stable transgene expression in the mouse mammary gland.
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