PDX models, generated from B7-H3 highly-expressing human lung tissue, were subjected to ITC-6102RO treatment (Fig. 8A, B). In the 11C38 model, tumor growth was suppressed by 95.9% and 100.1% with ITC-6102RO doses of 0.3 mg/kg and 0.6 mg/kg, respectively, on day ten, accompanied by a significantly increased survival rate (Fig. 8A).