Fig. 2From: Gint4.T-Modified DNA Tetrahedrons Loaded with Doxorubicin Inhibits Glioma Cell Proliferation by Targeting PDGFRβa Gel electrophoresis showed that the TDN remained stable for 24 h in complete medium at 37 °C (A); the TDN remained stable for 7 h when the concentration of foetal bovine serum was increased to 50% (B). b U87MG cells were co-cultured with the TDN at different concentrations (10–500 nM) for 24 h and 48 h. The CCK-8 assay showed that the activity of the U87MG cells was not affected, which indicated the biosafety of the TDNBack to article page