NCT03866525 OH2 Oncolytic Viral Therapy in Solid Tumors

Eligibility & Interventions

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What to Expect as a Participant

You will actively receive the study intervention — which may be a drug, biologic, device, or procedure.

Phase 1 is the earliest stage of human testing — safety and dosage are the primary focus. Visits are frequent and medical supervision is intensive. You will be among the first people to receive this treatment.

This trial targets 300 participants in total. It began in 2019-04-02 with a primary completion date of 2025-08-30.

Brief Summary

This phase I/II study evaluates the safety and efficacy of OH2 as single agent or in combination with HX008, an anti-PD-1 antibody, in patients with malignant solid tumors (gastrointestinal cancers, head and neck cancers, soft tissue sarcomas). OH2 is an oncolytic virus developed upon genetic modifications of the herpes simplex virus type 2 strain HG52, allowing the virus to selectively replicate in tumors. Meanwhile, the delivery of the gene encoding human granulocyte macrophage colony-stimulating factor (GM-CSF) may induce a more potent antitumor immune response.

Eligibility Criteria

Inclusion Criteria: 1. Histologically or cytologically confirmed unresectable or recurrent/metastatic solid tumors. 2. The patient must have failed the standard treatment (due to either disease progression or intolerable toxicity) or the standard of care had not been established for the specific condition. 3. Measurable disease based on Response Evaluation Criteria In Solid Tumors (RECIST) 1.1. 4. Eastern Collaborative Oncology Group (ECOG) Performance Status ≤ 1. 5. Life expectancy \>3 months. 6. The patient must have at least one tumor site appropriate for intratumoral injection. 7. Adequate organ function. 8. Participants of reproductive potential must be willing to use adequate contraception for the course of the study until 3 months after the last dose of any of the drugs in the study. 9. Participants with a history of HSV infection must have recovered at least 3 months before the study. 10. Willing and able to provide written informed consent and comply with the requirements of the study. Exclusion Criteria: 1. Uncontrolled concurrent illness including, but not limited to, severe cardiac disease, cerebralvascular disease, uncontrolled diabetes, uncontrolled hypertension, ongoing or active systemic infection, active peptic ulcer disease. 2. Central nervous system (CNS) metastases with clinical symptoms 3. Active infection or an unexplained fever \> 38.5°C. 4. Known Human Immunodeficiency Virus (HIV) infection, active Hepatitis B or Hepatitis C infection. 5. Pregnant or lactating female. 6. Patients who are receiving any other investigational agents. 7. Known immediate or delayed hypersensitivity reaction to HSV. 8. Previous malignancy within 5 years prior to study entry. 9. Patients with any active autoimmune disease or history of autoimmune disease. 10. Concurrent medical condition requiring the use of cortisol (\>10mg/day prednisone or equivalent dose) or other systematic immunosuppressive medications within 14 days before the study treatment, except for inhalation or topical corticosteroids no more than 10 mg/day prednisone or equivalent. 11. Familial, sociological or geographical conditions that, in the judgment of the investigator, do not permit compliance with the protocol.

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