OH2 Oncolytic Viral Therapy in Solid Tumors

  • End date
    Apr 30, 2022
  • participants needed
  • sponsor
    Wuhan Binhui Biotechnology Co., Ltd.
Updated on 31 July 2021
measurable disease
colony stimulating factor
solid tumour


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.


This is a phase I/II study evaluating the safety and efficacy of OH2 injection in patients with malignant solid tumors.

In the phase I dose escalation part, three doses (1x10e6, 1x10e7, 1x10e8 CCID50/mL) of OH2 will be delivered intratumorally as single agent and in combination with HX008 to observe the DLTs and to identify the MTD. After the completion of phase I, the recommended dose for single agent and combination therapy will be determined for dose expansion in phase II.

The phase II part comprises of 4 cohorts. In cohort 1, patients will be treated at the recommended dose as defined in phase 1. In cohort 2, OH2 will be delivered in combination with irinotecan for the treatment of advanced gastrointestinal cancers. In cohort 3, OH2 will be injected in combination with HX008, and the first doses of the two anti-tumor agents will be administered on the same day. The treatments in cohort 4 will be identical as in cohort 3, except that the first dose of HX008 will be administered at the time of the third dose of OH2.

The biodistribution of OH2 is evaluated in the phase 1 part of the trial by detection of viral loads in the blood, urine, and saliva at different timepoints. In addition, the injection sites are swabbed for virus shedding on the next day of each dose from cycle 1-3.

Adverse events (AEs) and DLTs are graded according to the National Cancer Institute Common Terminology Criteria for Adverse Events (CTCAE) (version 5.0). Radiographic imaging studies are performed using computed tomography or magnetic resonance imaging. Measurement of cutaneous or subcutaneous lesions are conducted with calipers. Evaluation of response are performed by the investigators using both the RECIST version 1.1 and the iRECIST criteria.

Condition Gastrointestinal Neoplasm, GASTROINTESTINAL DISORDER, Neoplasm of unspecified nature of digestive system, Gastrointestinal Diseases and Disorders, Solid Tumors, Solid Tumor, Solid Neoplasm, Solid Tumour, Digestive System Neoplasms, gastrointestinal cancer, gastrointestinal cancers
Treatment OH2 injection, HX 008 injection, OH2 injection, with or without irinotecan or HX008
Clinical Study IdentifierNCT03866525
SponsorWuhan Binhui Biotechnology Co., Ltd.
Last Modified on31 July 2021


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Inclusion Criteria

Histologically or cytologically confirmed unresectable or recurrent/metastatic solid tumors
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
Measurable disease based on Response Evaluation Criteria In Solid Tumors (RECIST) 1.1
Eastern Collaborative Oncology Group (ECOG) Performance Status 1
Life expectancy >3 months
The patient must have at least one tumor site appropriate for intratumoral injection
Adequate organ function
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
Participants with a history of HSV infection must have recovered at least 3 months before the study
Willing and able to provide written informed consent and comply with the requirements of the study

Exclusion Criteria

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
Central nervous system (CNS) metastases with clinical symptoms
Active infection or an unexplained fever > 38.5C
Known Human Immunodeficiency Virus (HIV) infection, active Hepatitis B or Hepatitis C infection
Pregnant or lactating female
Patients who are receiving any other investigational agents
Known immediate or delayed hypersensitivity reaction to HSV
Previous malignancy within 5 years prior to study entry
Patients with any active autoimmune disease or history of autoimmune disease
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
Familial, sociological or geographical conditions that, in the judgment of the investigator, do not permit compliance with the protocol
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