9MW2821 in Combination With Toripalimab vs Standard Chemotherapy in Locally Advanced or Metastatic Urothelial Cancer

• Sign the informed consent form approved by IEC.
• Male or female subjects aged 18 to 80 years.
• ECOG status: 0 or 1.
• Histologically confirmed local advanced or metastatic urothelial cancer
• Previously untreated with local advanced or metastatic urothelial cancer
• At least one measurable lesion, according to RECIST V1.1.
• Adequate tumor tissues submitted for test
• Suitable for cisplatin/carboplatin-based chemotherapy assessed by investigator
• Life expectancy for more than 12 weeks.
• Adequate organ functions.
• Proper contraception methods.
• Willingness to follow the study procedures.

Exclusion Criteria:

• History of another malignancy within 3 years.
• History of autoimmune disease requiring systemic treatment within 2 years.
• History of clinically significant cardiac/cerebrovascular diseases or thrombosis within 6 months.
• Major surgery treated within 28 days; Any live vaccines got within 28 days; Radiotherapy or Intravesical therapy treated within 21 days; Traditional Chinese medicine or any potent CYP3A4 inducers/inhibitors taken within 14 days.
• Lots of pleural fluid and ascites, uncontrolled bone pain or spinal compression existed within 14 days; Systemic treatment with active infection within 7 days.
• Previously treated with PD-1, PD-L1, PD-L2, CTLA-4 inhibitors; Previously treated with ADCs which target Nectin-4 or are conjugated with payload MMAE; Organ transplantation or allogeneic hematopoietic stem cell transplantation in the past.
• Clinical significantly toxicity Grade ≥ 2 (except alopecia and pigmentation) related to previous treatment.
• Any situations adding the risk of severe dry eye, active keratitis or corneal ulcer, etc.
• Peripheral neuropathy Grade ≥ 2.
• Any other serious chronic or uncontrolled disease.
• Uncontrolled central nervous system metastases or carcinomatous meningitis.
• Active HBV/HCV/HIV infection, etc.
• Known allergic sensitivity to any of the ingredients of the study drug.
• History of drug abuse or mental illness.
• Other conditions unsuitable into the study.