FOLH1 and prostate cancer: The dual aptamer probe—an A10 aptamer for PSMA(+) prostate cancer cells, and a DUP-1 aptamer for PSMA(−) prostate cancer cells—was invented, and a drug-loaded dual aptamer complex was constructed by loading doxorubicin, an anticancer drug, onto the A10 aptamer strand (Figure 11(a)).