Clinical trial NCT06915779: Long Term Follow-up of HPV Vaccine in HIV (CTN 236)
Official title: Long Term Follow-up Study of CTN 236 - A Study of an HPV VLP Vaccine in a Cohort of HIV Positive Girls and Women
Study type: OBSERVATIONAL
Overall status: COMPLETED
Conditions: Cervical Cancer
Human Papillomavirus Infection
Human Immunodeficiency Virus
Cervical Dysplasia
Genital Warts
Keywords: HPV
HPV Vaccine
HIV
Women
Genital Warts
Cervical Cancer
Lead sponsor: University of British Columbia
Sponsor class: OTHER
Collaborators: name: CIHR Canadian HIV Trials Network
name: Women's Health Research Institute of British Columbia
name: Canadian Institutes of Health Research (CIHR)
name: BC Women's Hospital & Health Centre
name: Merck Canada Inc.
name: University Health Network, Toronto
name: McGill University
name: University of Saskatoon
name: British Columbia Centre for Disease Control
name: Vaccine Evaluation Center, Canada
name: British Columbia Cancer Agency
First posted: 2025-04-08
Enrollment: 241
Sex: FEMALE
Minimum age (years): 11
Maximum age (years): 60
Standard ages: CHILD
ADULT
Accepts healthy volunteers: no
Observational model: COHORT
Time perspective: PROSPECTIVE
Sampling method: NON_PROBABILITY_SAMPLE
Study population: HIV positive girls and women (greater than, or equal to, age 11) attending the HIV treatment clinics in each of the 13 sites across Canada and who have enrolled in the original study, "A Study of an HPV VLP Vaccine in a Cohort of HIV Positive Girls and Women (CTN 236)" and received at least one dose of the quadrivalent HPV vaccine, will be offered participation in the study.

Brief summary: The purpose of this extension study is to determine whether HPV antibody levels in HIV-positive girls and women will decline more rapidly and more significantly than in HIV-negative girls and women and if this decline is determined by HIV parameters.

Detailed description: Study hypothesis: HPV antibody levels in HIV-positive girls and women will decline more rapidly and more significantly than in HIV-negative girls and women and that this decline will be determined by HIV parameters.

Girls and women living with HIV (greater than, or equal to, age 11) attending the HIV treatment clinics in each of the 13 sites across Canada and who enrolled in and received at least one dose of quadrivalent HPV vaccine as part of "A Study of an HPV VLP Vaccine in a Cohort of HIV Positive Girls and Women (CTN 236)" will be offered participation in this long term follow-up study.

OBJECTIVES

Primary:

To measure the antibody response to each genotype contained in the qHPV vaccine to 96 months post first dose of quadrivalent HPV vaccine.

Secondary:

1. To determine the incidence rate and nature of 'breakthrough' HPV incidence and persistent (2 sequential positive HPV DNA in \> 6 months) infections of vaccine - non-vaccine-containing high-risk types;
2. To determine the incidence rate of cervical dysplasia (LSIL or greater) and/or vulvar and vaginal dysplasia associated HPV genotypes (both with and without vaccine types; and
3. To determine the incidence rate of external genital warts.

Exploratory:

1. To examine the relationship between HSV-2 serostatus and peak HPV antibody response as well as HPV incidence and persistent infections; and
2. To relate vaginal microbiome profiles to HPV acquisition/persistence and cervical dysplasia.

STUDY DESIGN Phase 3, longitudinal, multi-center, 13 sites, girls and women living with HIV aged 11 years of age and older, received one plus dose of quadrivalent HPV vaccine in the precursor study.

STUDY VISITS 3 possible visits over a total of 5 years

* Visit 8 (month 36)
* Visit 9 (month 48)
* Visit 10 (month 60)
* Visit 11 (month 72)\*
* Visit 12 (month 84)\*
* Visit 13 (month 96)\*

STUDY PROCEDURES:

Informed consent, Medical history, Height \& weight, Cervical cytology and HPV DNA (liquid prep method), Gynecological swab for vaginal microbiota, Serology for HPV antibodies, Serology for HSV-2, Lower Urinary Tract Symptoms Survey (at one time-point only for participants 18 years of age and older).

NOTE: Girls who are pre-menarchal and not sexually active will not be asked to undergo any genital examinations or sampling until they become menarchal and sexually active.

DATA COLLECTION Consent and source document templates will be provided by the Study Coordinating Center. Source data will be transferred to paper case report forms and sent to the Study Coordinating Center/CTN where it will be entered into an electronic database.

PRIMARY ENDPOINT The primary endpoint of this study will be the HPV antibody GMT for each of the 4 types contained in the GARDASIL™ vaccine up to month 96 after receiving at least one dose of the vaccine.

SECONDARY ENDPOINTS Incidence rates of: 1) breakthrough incidents and persistent HPV infections; 2) cervical dysplasia; 3) external genital warts

Eligibility criteria: Inclusion Criteria:

* Enrolled in CTN 236 study, phase 1
* Able to give fully informed consent or assent

Exclusion Criteria:

* Did not receive at least one vaccination via CTN 236, phase 1
* Cannot provide fully informed consent or assent

Primary outcomes:
measure: Primary Objective
timeFrame: 96 month post-vaccination regimen
Secondary outcomes:
measure: Secondary Objective #1
timeFrame: 96 month post-vaccination regimen
measure: Secondary Objective #2
timeFrame: 96 month post-vaccination regimen
measure: Secondary Objective #3
timeFrame: 96 month post-vaccination regimen
Other outcomes:
measure: Exploratory Objective #1
timeFrame: 96 month post-vaccination regimen
measure: Exploratory Objective #2
timeFrame: 96 month post-vaccination regimen
Locations:
city: Vancouver
country: Canada
facility: Oak Tree Clinic, BC Women's Hospital & Health Centre
state: British Columbia
city: Vancouver
country: Canada
facility: AIDS Research Program & the John Ruedy Immunodeficience Clinic, St. Paul's Hospital
state: British Columbia
city: Hamilton
country: Canada
facility: Hamilton Health Sciences
state: Ontario
city: Kingston
country: Canada
facility: Infection & Immunology Clinic, Hotel Dieu
state: Ontario
city: Ottawa
country: Canada
facility: Children's Hospital of Eastern Ontario (CHEO)
state: Ontario
city: Toronto
country: Canada
facility: St. Michael's Hospital
state: Ontario
city: Toronto
country: Canada
facility: The Hospital for Sick Children
state: Ontario
city: Toronto
country: Canada
facility: Maple Leaf Research
state: Ontario
city: Toronto
country: Canada
facility: Toronto General Hospital
state: Ontario
city: Windsor
country: Canada
facility: HIV Care Program
state: Ontario
city: Montréal
country: Canada
facility: Centre de maternal et infantile sur le sida, CHU Sainte Justine
state: Quebec
city: Montréal
country: Canada
facility: Chronic Viral Illness Service, Hopital Royal Victoria (McGill University)
state: Quebec
city: Québec City
country: Canada
facility: CHUL and Mother-Child Center Soleil, Centre de Recherche en Infectiologie CHU de Quebec, (Universite Laval)
state: Quebec
Study officials:
affiliation: Dept. OB/GYN, University of British Columbia
name: Deborah M Money, MD, FRCSC
role: PRINCIPAL_INVESTIGATOR
References: