This is a single-center, open-label, dose-escalation, multiple-dose investigator-initiated exploratory study designed to evaluate the safety, tolerability and preliminary efficacy of tumor neoantigen-pulsed autologous dendritic cell injection (YS247) in participants with HRD-negative epithelial ovarian cancer.
Female aged 18-70 years (inclusive of cut-off values); body weight ≥45 kg.
Failed to achieve Complete Response (CR) after completion of at least first-line therapy (i.e., surgery and platinum-based chemotherapy), with abnormal CA125 levels or at least one measurable lesion confirmed by imaging assessment.
Completed genomic and transcriptomic sequencing of tumor samples, finished the analysis of genetic mutation characteristics and immune characteristics of tumor samples, and is eligible for screening of personalized tumor neoantigens.
Laboratory examinations must meet the following criteria: white blood cell count ≥4.0×10⁹/L; absolute lymphocyte count ≥1.0×10⁹/L; platelet count ≥80×10⁹/L; hemoglobin ≥9.0 g/L; aspartate aminotransferase (AST) and alanine aminotransferase (ALT) ≤2.5×Upper Limit of Normal (ULN) (≤5×ULN for patients with concurrent liver metastases); bilirubin ≤1.5×ULN (≤3×ULN for patients with Gilbert's syndrome); alkaline phosphatase (ALP) ≤2.5×ULN (≤5×ULN for patients with concurrent liver metastases); albumin ≥30 g/L; serum creatinine and/or urea <1.5 times the normal value; coagulation tests: international normalized ratio (INR) <1.7 or prolonged prothrombin time (PT) <4 seconds.
(Per interview) Allergic diathesis with hypersensitivity to two or more drugs, or known hypersensitivity to any component of the personalized neoantigen-sensitized autologous dendritic cell injection (cell cryopreservation solution CS10, human albumin, 0.9% sodium chloride injection).
(Per interview) A past or current diagnosis of Myelodysplastic Syndrome (MDS) or Acute Myeloid Leukemia (AML).
(Per interview) Patients with symptomatic, uncontrolled brain metastasis or leptomeningeal metastasis.
(Per interview) Suffering from severe or uncontrolled diseases, including but not limited to: uncontrolled ventricular arrhythmia, myocardial infarction within the recent 3 months, uncontrolled grand mal epilepsy, unstable spinal cord compression, superior vena cava syndrome, immunodeficiency (excluding splenectomy), or other diseases that the investigator deems may expose the patient to a high risk of harm.