Preparation, Characterization, and In Vitro and Vivo Antitumor Activity of Oridonin-Conjugated Multiwalled Carbon Nanotubes Functionalized with Carboxylic Group

Table 1

I values of various formulations of ORI on HepG-2 cells.

Formulation	I (μg/mL)
ORI-F
MWCNTs-ORI
MWCNTs-COOH

I is defined as the concentration that resulted in a 50% decrease in cell number and the results are means ± standard deviation of three independent replicates.