Virus Diseases Clinical Trial
Official title:
A Phase III Randomized Blinded Study to Evaluate SYN023 Compared to Human Rabies Immune Globulin in Post Exposure Prophylaxis of Rabies in Adults With Category III Rabies Exposure Risks
This is a Phase 3, blinded, randomized study of SYN023 compared to a China licensed Human Rabies Immunoglobulin (a Rabies immune globulin from human sources, HRIG) for the prevention of rabies as part of post-exposure prophylaxis (PEP). The trial will enroll the World Health Organization (WHO) Category III rabies exposure subjects. The subject's death and rabies data will be reviewed by Data and safety monitoring board (DSMB) to confirm the safety. Besides, rabies vaccine would be administered after Study Drug in each group. This trial is proposed to further the licensure of SYN023 to provide an effective PEP alternative available to those exposed persons who need such a product. A placebo-controlled rabies trial is unethical thus HRIG is selected as the control group. Rabies immune globulin from equine and human sources (HRIG) have been evaluated in many trials and HRIG is the standard of care in China.
This is a Phase 3, randomized, blinded, and active controlled study of SYN023 compared with a China licensed HRIG for PEP of patients who have been confirmed to have met all inclusion/exclusion criteria for their treatment group. 1000 patients aged 18 and above with the World Health Organization (WHO) Category III rabies exposure should be enrolled as planned and randomly assigned to the experimental group and the control group based on a ratio of 3: 1 through on-site stratification as part of PEP. All subjects should receive wound infiltration injection of SYN023 or HRIG on Study Day 1 (wound conditions should be described and recorded before injection, including diameter, depth, expansion treatment, etc.), and should also simultaneously receive intramuscular injection of one dose of the freeze-dried rabies vaccine for human use (Vero cells) into the deltoid muscle. In accordance with the Essen Scheme, each subject also needs to receive one dose of the freeze-dried rabies vaccine for human use (Vero cells) on Study Days 4, 8, 15, and 29 respectively. 3.0 mL of venous blood samples should be collected 8 times from each subject prior to administration and on Study Day 4, 8, 15, 43, 99, 183, and 365 post administration of study drug. Relevant information should be collected from the subjects through follow-up visits, such as occurrence of rabies and survival conditions. RVNA should be assayed through rapid fluorescence focus inhibition test (RFFIT). Local adverse events related to the SYN023 injection sites and injection sites of the first dose and second dose of rabies vaccine, and systemic adverse events (AE) other than injection sites should be collected within 7 days after administration; local adverse events related to the injection sites of the third dose, fourth dose and fifth dose of rabies vaccine, and systemic adverse events (AE) other than the injection sites should be collected 7 days after administration. In addition, all adverse events occurring within 43 days after administration should be collected, and pregnancy conditions in 6 months after administration and all serious adverse events (SAE) occurring during the study period should be collected. ;
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