Table 1.

Cytotoxicity of different PTX formulations in cancer cells. The RRI was calculated as IC₅₀ of PTX vs. IC₅₀ of exoPTX or Taxol

Drug	Cell Line	IC50 (ng/ml)	RRI
	3LL-M27	13.57 ± 1.33	9.32
exoPTX	MDCK wt	23.33 ± 3.77	18.38
	MDCK MDR1	187.5 ± 38.65	>53.33
	3LL-M27	23.16 ± 1.88	5.46
Taxol	MDCK wt	69.54 ± 11.5	6.17
	MDCK MDR1	1708.67 ± 299.93	>5.85
	3LL-M27	126.41 ± 31.31	1
Paclitaxel	MDCK wt	428.77 ± 63.37	1
	MDCK MDR1	>10,000