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(A) Cytotoxicity of DOX-based combinations (DOX/TPL-1/0.05, 1/0.1, 1/0.2, 1/0.5, and 1/1) against KB cells after incubation for 48 h (n=4). (B) Plot of the combination index as the function of cell viability for KB cells treated with free DOX and free TPL combinations.
Abbreviations: DOX, doxorubicin; TPL, triptolide.
