“…Up‐regulated LDL receptors have been reported in leukemia cells, on which the LDL receptor activity was 3–100 times higher than that on normal white blood cells 2. Elevated LDL receptor levels were also reported in colon, kidney, and liver tumors, as well as in other tumor cells 3–8. Because of its high expression in tumor cells, and its function as an internalizing receptor, LDL receptor becomes an attractive target for the selective delivery of antineoplastic drugs to tumors.…”