This is a two-stage phase I clinical trial with oncolytic viruses BS-006 in recurrent or metastasis cervical cancer patients who failed in second line treatment.
This trial includes accelerated dose-escalation stage and dose-expansion stage. An engineered modification oncolytic viruses, BS-006, derived from type II herpes simplex virus strain are planed to be injected into the tumor every two weeks until disease progression or unacceptable toxicity or withdrawn of consent or no lesion suitable for injection or death. In dose-escalation stage, there are three dose levels (1 million, 10 millions, 100 millions 50 % cell culture infectious dose (CCID50)/ml) . Treatment dose will escalate to next higher level if no dose limiting toxicity happens for one time of injection in 3 subjects. Maximal tolerable dose is defined as the highest dose with no more than one dose limiting toxicity and is recommended for dose expansion stage. In dose-expansion stage, 15 subjects will be enrolled. BS-006 viruses will be injected into proper tumor lesions every 2 weeks until disease progression or unacceptable toxicity or withdrawn of consent or no lesion suitable for injection or death. Radiology assessment will repeat every 6 weeks. Dose interruption, not reduction, is permitted in this stage.
Study Type
INTERVENTIONAL
Allocation
NON_RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
18
BS-006 is an engineered recombinant type II herpes simplex virus (HSV2) designed and produced by Wuhan Binhui Biopharmaceutical Co., Ltd. It was derived from HSV2 strain HG52. ICP34.5 and ICP47 genes were deleted to ensure abortive infection and immune destruction in normal cells. Bispecific T cell engager of anti-CD3 antibody and anti-PD-L1 antibody were constructed and inserted into HG52 strain genome.
Zhongnan Hospital of Wuhan University
Wuhan, Hubei, China
RECRUITINGMaximal tolerable dose
The dose level at which there is no more than one DLT happens in dose-escalation stage
Time frame: 2 months after initiation of enrollment
Rate and grade of adverse events
The incidence of adverse events and severity graded according to CTCAE 5.0
Time frame: From enrollment to 90 days after last treatment of all subjects
Cope numbers of BS-006
Detection of BS-006 virus copy numbers in urine, stool, saliva, blood and wiper of injection point and perineum
Time frame: 1 hours predose and 0.5 hours post-dose for first three doses and 1 hours predose ever after
Tumor response rate
Tumor change assessed by investigator according to RECIST 1.1
Time frame: Up to 2 years
Abscopal effect rate
Rate of subjects who showed tumor shrinkage for any untreated lesion
Time frame: Up to 2 years
Progression free survival rate
Proportion of participants without tumor recurrence or death
Time frame: Up to 2 years
Overall survival rate
Proportion of survival participants
Time frame: Up to 2 years
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