Long-term Effectiveness and Immuno-persistence Study of a Recombinant Human Papillomavirus 16/18 Bivalent Vaccine in Girls Aged 9-17 Years
Overview
- Phase
- Not Applicable
- Status
- Active, not recruiting
- Sponsor
- Xiamen University
- Enrollment
- 2,188
- Locations
- 1
- Primary Endpoint
- Incidence of persistent infection, transient infection, and cervical precancerous CIN1+ lesions associated with HPV types 16 and 18
Overview
Brief Summary
The primary objective of this study is to evaluate the protective efficacy against future infections of HPV types 16/18 or related diseases and immuno-persistence (type specific IgG antibody) of the bivalent HPV vaccine in young female populations aged 9-17 years.
Detailed Description
This is a follow-up study that is based on the bridging study of a recombinant human papillomavirus 16/18 bivalent vaccine in preadolescent girls(Unique Protocol ID:HPV-PRO-006,Identifiers: NCT02562508) . This study proposes to conduct a prospective cohort study based on the cohort population from the immunobridging clinical trial of the bivalent HPV vaccine (Unique Protocol ID:HPV-PRO-006,Identifiers: NCT02562508) . By matching control groups according to factors such as age and education level, and through long-term follow-up, this research aims to elucidate the protective efficacy of the bivalent HPV vaccine against future infections of HPV types 16/18/31/33/45 or related diseases in young female populations aged 9-17 years. Additionally, the study will evaluate the persistence of vaccine-induced antibodies, investigate the potential for type replacement/competition phenomena post-vaccination and assess oral HPV infections in the cohort population.
Study Design
- Study Type
- Observational
- Observational Model
- Cohort
- Time Perspective
- Prospective
Eligibility Criteria
- Ages
- 18 Years to — (Adult, Older Adult)
- Sex
- Female
- Accepts Healthy Volunteers
- Yes
Inclusion Criteria
- •Participants must be at least 18 years old;
- •Participants who have participated in the immunobridging clinical trial of the bivalent HPV vaccine (Unique Protocol ID:HPV-PRO-006,Identifiers: NCT02562508) and have received at least one dose of the vaccine (only applicable to the vaccine group);
- •Able to understand the study procedure and have the ability to comply with the protocol requirements (e.g., collection of biological samples and regular follow-up) and sign a written informed consent form;
Exclusion Criteria
- •Participants who did not experience sexual debut;\*
- •Participants with acute cervical inflammation and acute lower genital tract infection;\*
- •Participants during menstruation, or have vaginal medication, sexual behavior within two days (48 hours) before the visit, which may affect gynecological examinations and specimens collection;\*
- •Participants in the vaccine group have used other HPV vaccine products (including both marketed and unmarketed vaccines) after participating in the immunobridging clinical trial of the bivalent HPV vaccine (Unique Protocol ID: HPV-PRO-006, Identifiers: NCT02562508); Participants in the control group have used HPV vaccine products (including both marketed and unmarketed vaccines);
- •According to the judgement of investigator, various medical, psychological, social, vocational or other factors that are not suitable for participating in the study.
- •Note: For criteria marked with an asterisk (\*), if the participant meets that exclusion criterion, it does not affect the blood sample collection.
Arms & Interventions
Vaccine group for long-term effectiveness evaluation
No intervention was implemented in this study. Participants who have participated in the immunobridging clinical trial of the bivalent HPV vaccine (Unique Protocol ID:HPV-PRO-006,Identifiers: NCT02562508) and were aged 9-17 years at the time of enrollment, and have received at least one dose of the vaccine were recruited as the vaccine group for long-term effectiveness evaluation.
Intervention: Recombinant Human Papillomavirus Bivalent (Types 16, 18) Vaccine (Escherichia coli) (Biological)
Control group for long-term effectiveness evaluation
No intervention was implemented in this study. Participants with no previous HPV vaccination history were recruited as the control group for long-term effectiveness evaluation.
Intervention: No intervention (Other)
Vaccine group for immuno-persistence evaluation
No intervention was implemented in this study. Participants who have participated in the immunobridging clinical trial of the bivalent HPV vaccine (Unique Protocol ID:HPV-PRO-006,Identifiers: NCT02562508) and were aged 9-26 years at the time of enrollment, and have received at least one dose of the vaccine were recruited as the vaccine group for immuno-persistence evaluation.
Intervention: Recombinant Human Papillomavirus Bivalent (Types 16, 18) Vaccine (Escherichia coli) (Biological)
Outcomes
Primary Outcomes
Incidence of persistent infection, transient infection, and cervical precancerous CIN1+ lesions associated with HPV types 16 and 18
Time Frame: 8-10 years after the first dose
To evaluate the efficacy of the bivalent vaccine against this outcome
Anti-HPV 16 and 18 IgG antibody seropositive rates and geometric mean concentrations
Time Frame: 9 years after the first dose
To detect the anti-HPV 16 and anti-HPV 18 type-specific IgG antibody level 9 years after the first dose
Secondary Outcomes
- Incidence of persistent infection, transient infection, and cervical precancerous CIN1+ lesions associated with HPV types 31/33/45(8-10 years after the first dose)
Investigators
Jun Zhang
professor
Xiamen University