AR and chondrosarcoma: We then pretreated chondrosarcoma cell lines JJ012 and SW1353 with different concentrations of exogenous recombinant AR and found that AR effectively and dose-dependently promoted cell viability in the presence of cisplatin (Figure 1C and Supplementary Figure 1), confirming that AR increases levels of cisplatin resistance in JJ012 and SW1353 cells.