Abstract
In this study, we developed a cell-specific mRNA transfection system using streptavidin-protein A (ST-PA) fusion protein and monoclonal antibodies (mAbs). We previously reported that ST-PA fusion protein and mAb complexes can transfer certain biotinylated proteins into specific cell types. At this time, we combined anin vitrotranscribed biotinylated and self-replicating Sindbis virus genomic RNA with ST-PA fusion protein and mAbs. In the presence of cationic liposomes, to prevent RNA degradation, this complex is able to transfect a reporter gene to specific cancer cells in a mAb dose-dependent manner. Even in the absence of cationic liposomes, biotinylated mRNA, ST-PA fusion, and mAb complexes can transfer some types of cancer cell suspension cultures. This cell-specific transfection system is a novel method of introducing various mRNAs into cells that results in high levels of transient protein expression.
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