This trail is to evaluate the safety profile of Recombinant Nonavalent (Types 6/11/16/18/31/33/45/52/58) Human Papillomavirus (HPV) Vaccine (Escherichia Coli) in healthy Chinese women ages 20-45 and determine the optimal ratio of the antigens included in the investigational vaccine. Besides, the trail is also to demonstrate that the levels of neutralizing antibodies to vaccine HPV types 31, 33, 45, 52 and 58 elicited by the investigational vaccine with the chosen optimal antigen ratio are superior to those induced by Gardasil.
This is a single-center, blinded, randomized and Gardasil-controlled (quadrivalent HPV vaccine GARDASIL®) Phase II clinical trial. The trial will recruit a total of approximately 780 Chinese women 20-45 years of age with permanent residence. Healthy women ages 20-45 eligible for the trial will be stratified at a 1: 1 ratio into 2 age subgroups (20-30 years of age and 31-45 years of age), and each subgroup will be randomized at a 1: 1: 1 ratio to receive the mid-dosage investigational vaccine, high-dosage investigational vaccine or the positive control (quadrivalent HPV vaccine GARDASIL®), respectively. Each subject will be administered 0.5 ml of the investigational vaccine or control in accordance with a 3-dose regimen at months 0, 2 and 6. Peripheral blood samples of each subject will be collected at Day 0 (prior to dose 1), Month 7 (1 month post dose 3) to determine the levels of neutralizing antibodies and IgG antibodies to HPV types 6/11/16/18/31/33/45/52/58 in the sera. Optimal ratio of the antigens included in the investigational vaccine will be decided based on the immunogenicity and safety data from this trail.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
PREVENTION
Masking
DOUBLE
Enrollment
780
For Mid-dosage group, a 3-dose regimen administered at months 0, 2 and 6. For High-dosage group, a 3-dose regimen administered at months 0, 2 and 6.
A 3-dose regimen administered at months 0, 2 and 6.
CDC, Jiangsu Province
Nanjing, Jiangsu, China
Percentage of adverse reactions up to Day 7 after each dose of the interventions
Percentage of subjects with 1 or more injection-site or non-injection-site (systemic) adverse reactions up to Day 7 after each dose of the interventions
Time frame: 0-7 days after each immunization
To determine the optimal ratio of antigens included in the investigational vaccine
To determine the optimal ratio of antigens included in the investigational vaccine through non-inferiority analysis of the GMTs of neutralizing antibodies specific to vaccine HPV types 6, 11, 16 and 18 elicited by the investigational vaccine versus those induced by the positive control, in subjects negative for antibodies to such vaccine HPV types prior to dose 1.
Time frame: The 1st month after full immunization
Percentage of adverse events up to Day 30 after each dose of the interventions
Percentage of subjects with 1 or more injection-site or non-injection-site (systemic) adverse events up to Day 30 after each dose of the interventions
Time frame: 0-30 days after each immunization
Percentage of erious adverse events for the duration of the study
Percentage of subjects with serious adverse events for the duration of the study (from Day 1 till Month 7)
Time frame: Through study completion, an average of 7 months
To demonstrate that the levels of neutralizing antibodies
To demonstrate that the levels of neutralizing antibodies specific to vaccine HPV types 31, 33, 45, 52 and 58 elicited by the investigational vaccine with the chosen optimal antigen ratio are superior to those induced by Gardasil through assessing the GMTs of neutralizing antibodies to HPV types 31, 33, 45, 52 and 58 in the sera of the subjects who are negative for antibodies to such HPV types prior to dose 1 of the investigational vaccine in comparison with those administered Gardasil.
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Time frame: The 1st month after full immunization
To evaluate the levels of neutralizing antibodies
Subgroup Analysis: To evaluate the levels of neutralizing antibodies to each HPV type (HPV 6/11/16/18/31/33/45/52/58) at Month 7 post dose 1 among subjects who were negative for antibodies to the corresponding HPV type (HPV 6/11/16/18/31/33/45/52/58) prior to dose 1.
Time frame: The 7th month after first immunization
To evaluate the levels of IgG antibodies
Subgroup Analysis: To evaluate the levels of IgG antibodies to each HPV type (HPV 6/11/16/18/31/33/45/52/58) at Month 7 post dose 1 among subjects who were negative for antibodies to the corresponding HPV type (HPV 6/11/16/18/31/33/45/52/58) prior to dose 1.
Time frame: The 7th month after first immunization
To evaluate the rates of seropositivity
Subgroup Analysis: To evaluate the rates of seropositivity to each HPV type (HPV 6/11/16/18/31/33/45/52/58) at Month 7 post dose 1 among subjects who were negative for antibodies to the corresponding HPV type (HPV 6/11/16/18/31/33/45/52/58) prior to dose 1.
Time frame: The 7th month after first immunization
To evaluate the rates of seroconversion
Subgroup Analysis: To evaluate the rates of seroconversion to each HPV type (HPV 6/11/16/18/31/33/45/52/58) at Month 7 post dose 1 among subjects who were negative for antibodies to the corresponding HPV type (HPV 6/11/16/18/31/33/45/52/58) prior to dose 1.
Time frame: The 7th month after first immunization
To evaluate the levels of neutralizing antibodies among all subjects
To evaluate the levels of neutralizing antibodies to each HPV type (HPV 6/11/16/18/31/33/45/52/58) at Month 7 post dose 1 among all subjects.
Time frame: The 7th month after first immunization
To evaluate the levels of IgG antibodies among all subjects
To evaluate the levels of IgG antibodies to each HPV type (HPV 6/11/16/18/31/33/45/52/58) at Month 7 post dose 1 among all subjects.
Time frame: The 7th month after first immunization
To evaluate the rates of seropositivity among all subjects
To evaluate the rates of seropositivity to each HPV type (HPV 6/11/16/18/31/33/45/52/58) at Month 7 post dose 1 among all subjects.
Time frame: The 7th month after first immunization
To evaluate the rates of seroconversion among all subjects
To evaluate the rates of seroconversion to each HPV type (HPV 6/11/16/18/31/33/45/52/58) at Month 7 post dose 1 among all subjects.
Time frame: The 7th month after first immunization