They further showed that increased sensitivity of KMH2 cells to Adriamycin® toxicity by siRNA silencing of ABCC1. Prompted by this finding, we assessed for expression of five ABC transporters, ABCG2, ABCB1, ABCC1, ABCC2, and ABCC3, in untreated CHL tumor specimens. This evidence concerns the gene ABCC1 and classic Hodgkin lymphoma.