3277
Lower intracellular accumulation of actinomycin D was observed in MDCKII - ABCB1 cells as compared to MDCKII - WT ( 0 . 98 nM vs . 0 . 1 nM , p < 0 . 0001 ) , which was reversed upon ABCB1 inhibition .
 actinomycin D
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 actinomycin D