The transfection was performed in 15 µ—slide eight-well plates (ibidi 80826). A total of 2–3 × 104 cells were seeded per well in 200 µL of medium. Twenty-four hours after seeding, the cells were transfected using 150 ng of DNA per expression plasmid, 0.5 µL of jetPRIME, and 15 µL of jetPRIME buffer. Twenty-four hours after transfection, the cells were washed once with PBS supplemented with MgCl2 and CaCl2 (PBS+, Dulbecco’s phosphate buffered saline, Sigma-Aldrich D8662) and immunofluorescence staining was performed.
In case of the bicistronic vector construct, cells were transfected with 200 ng plasmid DNA. 4 h after transfection, expression was induced by doxycycline (1 µg/mL final concentration) and 24 h after induction, cells were washed once with PBS+ and ICC was performed.
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