Oncolytic virus therapy is a kind of immunotherapy that can selectively infect and kill tumor cells without damaging normal cells. It has shown good therapeutic effects in the treatment of various types of tumors. KM1 is a genetically modified recombinant vaccinia virus, which has good therapeutic effect on many solid tumors, including ovarian cancer. This study includes Phase Ia and Phase Ib. In the Phase Ia study, subjects will receive three doses intraperitoneal infusion of KM1 followed by chemotherapy. In the Phase Ib study, subjects will receive six doses intraperitoneal infusion of KM1 preceding chemotherapy. Subjects will be followed in the study for 6 months after last dose of chemotherapy.
The purpose of this study is to determine if KM1 is well tolerated with anti-tumor activity in patients diagnosed with recurrent or refractory ovarian cancer, and explore the Recommend Phase 2 Dose (RP2D) of KM1 in the treatment of patients with recurrent or refractory ovarian cancer.