Figure 2. Response of colorectal organoids to drugs. (A) Cell viability following treatment with different concentrations of chemotherapeutic agents. (B) The image and survival rate on day 3 after drug treatment. Drug-resistant organoid 126 and drug-sensitive organoid 199 showed a 59% difference in cell viability following treatment with 2 mM 5-FU, 83% difference following treatment with 10 μM cisplatin, 58% following treatment with 20 μM oxaliplatin, and 81% following treatment with 30 μM irinotecan.