OVV-01 Injection Combined With AK112 Injection for the Treatment of Patients With Advanced Soft Tissue Sarcoma (STS)

Inclusion criteria

• . Voluntarily sign the informed consent form, understand this study, and agree to comply with the protocol and complete all trial procedures;
• . Be at least 18 years of age at the time of signing the ICF, with no gender restrictions.
• . Histologically/cytologically confirmed metastatic or recurrent unresectable soft tissue sarcoma, currently failing standard therapy (disease progression, recurrence, or intolerance to treatments such as chemotherapy, radiotherapy, or targeted therapy) or lacking standard treatment options. Participants must have progressed after receiving at least two standard therapies (including but not limited to targeted therapies). Subjects must have demonstrated failure or intolerance to anthracycline-based standard chemotherapy regimens. For specific histologic subtypes lacking standard effective chemotherapy options (e.g., alveolar soft part sarcoma), subjects may have previously received targeted therapy (e.g., anti-angiogenic agents such as anlotinib, pazopanib) with failure or intolerance.
• . Subjects must have at least one measurable lesion as defined by RECIST 1.1 criteria, i.e., non-lymph node lesions with a longest diameter ≥10 mm and lymph node lesions with a shortest diameter ≥15 mm on CT or MRI. Injectable tumor lesions must be present, including superficial lesions and deep lesions amenable to injection under ultrasound/CT/or endoscopic guidance.
• . ECOG performance status of 0-2, with an estimated survival of at least 12 weeks.
• . Sufficient organ and hematopoietic function:Absolute neutrophil count (ANC) ≥ 1.5 × 10⁹/L; Platelet count ≥ 75 × 10⁹/L (no platelet transfusion or thrombopoietin (TPO) therapy within 2 weeks prior to first dose); Hemoglobin ≥ 90 g/L (no blood transfusion within 2 weeks); Serum creatinine ≤ 1.5 × upper limit of normal (ULN) or creatinine clearance (CCr) ≥ 50 mL/min; Aspartate aminotransferase (AST) and alanine aminotransferase (ALT) ≤ 3.0 × ULN; for patients with liver metastases, AST and ALT \< 5 × ULN; Serum total bilirubin (TBIL) ≤ 2 × ULN; International Normalized Ratio (INR) ≤ 1.5 × ULN, or Activated Partial Thromboplastin Time (APTT) ≤ 1.5 × ULN;