A, Screening of monoclonal cells by
puromycin amino nucleoside.
(c) Transduced hAD-MSCs after
puromycin selection; abundant green cells and GFP expression exhibit high transduction level (d) FACS analysis of the transduction rate after
puromycin selection indicated that more than 90% of the cells were GFP positive.
From above, cells were co-transfected with circular TALENs and linearized pBLC-TK, plated on 6-well plates and maintained at 37[degrees]C, under
puromycin selection.
Because the lentivirus vector contains both GFP gene and
puromycin resistance gene, we used both markers for evaluation and selection of transductants.
Then,
puromycin selection was performed in the presence of 2 mg/ml
puromycin for 2 weeks.
Infected cells were selected and continously maintained in the presence of 1.5 [micro]g/mL
puromycin.
After 48 h, Hygromycin B (500 [micro]g/mL; Sigma-Aldrich), Neomycin (750 [micro]g/mL; Life Technologies), and
Puromycin (5 [micro]g/mL; Sigma-Aldrich) were added to cell cultures.
The [hUDSCs.sup.miR-375+] were exposed to 2.5 [micro]g/mL
puromycin for 3days to obtain stable transduction.
After lentivirus infection and
puromycin selection, the drug-resistant cells were obtained.