Fig. 5
From: Dual-drug loaded nanoneedles with targeting property for efficient cancer therapy
In vitro cell viability of HeLa cells incubated with free MTX (a), NDs (b), NDs + MTX (d) and DDNDs (e) at different concentrations [(HCPT) = 0.125, 0.25, 0.5, 1.0, 2.0, and 4.0 µg/mL; (MTX) = 0.004, 0.008, 0.016, 0.032, 0.064, and 0.128 μg/mL] for 24 h. (c) The theoretical value of free MTX (a) and NDs (b). Data are presented as mean ± SD (n = 6). *P < 0.05