Interestingly, while the depleting of PCIF1 itself didn't induce an increase in cell apoptosis in Caki‐1 and OS‐RC‐2 (Figure S6A, Supporting Information), RCC cells with PCIF1 knockdown showed an enhanced tendency to undergo cell apoptosis when treated with sunitinib (Figure7A). The gene discussed is PCIF1; the disease is renal cell carcinoma.