Adherent cells such as mouse RAW cells or human cancer U2OS cells are beneficial to DNA transfection, with 20%-60% transfection efficiency. However, this DNA transfection is rarely used on suspension cells due to its low transfection efficiency (≤5%). We recently found a new DNA transfection method to increase the efficiency up to 13.5% in suspension cells without PMA treatment. We also found that DNA transfection of human TNFAIP1 or CXCL1 recombinant plasmid DNA in THP-1 cells induces a high level of TNF-α protein. Overall, this new method is simple yet efficient and can be used for the overexpression of DNA in suspension cells.
Keywords: Cell aggregation; DNA transfection; PMA pre-maturation; Recombinant plasmid; THP-1 suspension cells; Transfection efficiency.
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