Skip to main content
OpenTrials
Recruiting

NCT Number: NCT05672927

Comparing Immune Response of 2 vs 3 HPV Doses (27-45 Years Old)

The goal of this clinical trial is to compare a 2-dose and 3-dose series of 9vHPV vaccine among 27-45-year-old females to assess if 2 doses elicit a noninferior immune response. Participants will be randomized 1:1 to either the 2-dose group or the 3-dose group and asked to provide 4 blood samples over a period of 12 months. All 2-dose participants will be offered a 3rd dose after the final blood draw,12 months after their initial vaccination.

Recruiting

Interested in participating?

Request Info

Key information

Conditions

Immunization Communicable Diseases DNA Virus Infections Disease Attributes Genital Diseases HPV Infection Human Papillomavirus Infections Papillomavirus Infections Pathologic Processes Pathological Conditions, Signs and Symptoms Sexually Transmitted Diseases Sexually Transmitted Diseases, Viral Tumor Virus Infections Urogenital Diseases Virus Diseases

Age range

27 year–45 year

Sex eligibility

Female

Study type

Interventional

Phase

Phase 4

Primary location

University of Texas Medical Branch

Galveston, Texas, 77555, United States

Location status: Recruiting

Location contact

Rosalina M Trujillo

CONTACT

[email protected]

409-747-5594

About this study

The investigators are studying an alternate dosing regimen of an approved drug (9vHPV vaccine) in the population for which it is approved. The vaccine is approved for individuals ages 9-45 years old and participants in this study will be 27-45 years of age. The purpose of the study is to examine the immune response of 2 doses of 9vHPV vaccine. The current recommendation is to administer the vaccine in 3 doses (administered at 0, 1-2 months and 6 months) to those 15-45 years of age, but only 2 doses (administered at 0 and 6 months) if the vaccine series is initiated before age 15. The investigators will conduct a randomized study to determine if 2 doses of elicit a similar immune response to that of a standard 3 dose series in individuals 27-45 years of age. Participants in the study group will receive 2 doses of at 0 and 6 months. Participants in the control group will receive 3 doses of 9vHPV vaccine at 0, 2 months, and 6 months. All participants (target accrual n=618) will have 5 mLs of blood drawn at 0, 1, 7, and 12 months. Following the 12-month blood draw, participants randomized to 2-doses will be offered the 3rd dose. Potential participants will be recruited through the University of Texas Medical Branch (UTMB) clinics and surrounding community, and will be screened for inclusion/exclusion criteria. Eligible patients will sign an informed written consent. At their baseline visit, participants will have their blood drawn, be randomized into either the study or control group, and receive their first dose of the HPV vaccine. All participants will receive compensation administered through a ClinCard following each of the 4 blood draws.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Females 27-45 years old.
  • Ability to give informed consent.
  • Has not received any prior doses of the HPV vaccine. This will be verified by the person and state registry (Immtrac), as well as the person's electronic medical record.
  • Reliable telephone access for the duration of the project.
  • Can read and speak in either English or Spanish.
  • Identified source of funding for vaccine such as Medicaid, private health insurance, Texas Healthy Women program, etc.
  • Reports consistent use of reliable birth control and plans to continue its use through study month 13.

Exclusion criteria

  • Currently pregnant or plans to become pregnant or donate eggs in the next 13 months. Any subjects with positive pregnancy tests at the initial visit will be disqualified from the study and advised to seek prenatal care.
  • Has an immunodeficiency or autoimmune disease such as HIV infection, lymphoma, leukemia, lupus, rheumatoid arthritis, inflammatory bowel disease, or other autoimmune condition.
  • Currently receiving treatment or medication that can suppress immune function including radiation therapy, chemotherapy, cyclosporin, leflunomide (Arava), TNF-α antagonists, monoclonal antibody therapies (including rituximab [Rituxan]), intravenous gamma globulin (IVIG), antilymphocyte sera, other therapy known to interfere with the immune response, or systemic corticosteroids (by mouth or intramuscular injection). Those using or have used steroids that are inhaled, placed in the eye, applied on the skin, or injected into the joint/soft tissue will be considered eligible for the study.
  • History of splenectomy
  • Known allergies to any vaccine components, including aluminum, yeast or Benzonase.
  • Febrile at ≥100°F in the 24 hours prior to vaccination. The patients may be rescheduled for a later date.
  • History of thrombocytopenia or any coagulation disorder that would contraindicate intramuscular injections.
  • History of >10 sexual partners in their lifetime at time of enrollment
  • Plans to move out of the Galveston/Houston area in the 13 months following study entry.

Treatment and study plan

9-valent HPV vaccine, 2 doses alternate timing

Biological

Evaluate 2 doses of the 9-valent HPV vaccine across a 12-month period following the 1st dose among 27-45-year-old females.

9-valent HPV vaccine, 3 doses standard timing

Biological

This will be the comparison group for the 2-dose group.

Primary outcomes

  1. Short-term human papillomavirus (HPV) type-specific antibody response for type HPV-6

    Time frame: Month 1

    Yes/No for seroconversion, defined as changing from seronegative (antibody titer below established threshold) to seropositive (antibody titer above established threshold) for HPV-6, measured as number of participants.

  2. Short-term human papillomavirus (HPV) type-specific antibody response for type HPV-6

    Time frame: Month 7

    Yes/No for seroconversion, defined as changing from seronegative (antibody titer below established threshold) to seropositive (antibody titer above established threshold) for HPV-6, measured as number of participants.

  3. Short-term human papillomavirus (HPV) type-specific antibody response for type HPV-6

    Time frame: Month 12

    Yes/No for seroconversion, defined as changing from seronegative (antibody titer below established threshold) to seropositive (antibody titer above established threshold) for HPV-6, measured as number of participants.

  4. Short-term HPV type-specific antibody response for type HPV-11

    Time frame: Month 1

    Yes/No for seroconversion, defined as changing from seronegative (antibody titer below established threshold) to seropositive (antibody titer above established threshold) for HPV-11, measured as number of participants.

  5. Short-term HPV type-specific antibody response for type HPV-11

    Time frame: Month 7

    Yes/No for seroconversion, defined as changing from seronegative (antibody titer below established threshold) to seropositive (antibody titer above established threshold) for HPV-11, measured as number of participants.

  6. Short-term HPV type-specific antibody response for type HPV-11

    Time frame: Month 12

    Yes/No for seroconversion, defined as changing from seronegative (antibody titer below established threshold) to seropositive (antibody titer above established threshold) for HPV-11, measured as number of participants.

  7. Short-term HPV type-specific antibody response for type HPV-16

    Time frame: Month 1

    Yes/No for seroconversion, defined as changing from seronegative (antibody titer below established threshold) to seropositive (antibody titer above established threshold) for HPV-16, measured as number of participants.

  8. Short-term HPV type-specific antibody response for type HPV-16

    Time frame: Month 7

    Yes/No for seroconversion, defined as changing from seronegative (antibody titer below established threshold) to seropositive (antibody titer above established threshold) for HPV-16, measured as number of participants.

  9. Short-term HPV type-specific antibody response for type HPV-16

    Time frame: Month 12

    Yes/No for seroconversion, defined as changing from seronegative (antibody titer below established threshold) to seropositive (antibody titer above established threshold) for HPV-16, measured as number of participants.

  10. Short-term HPV type-specific antibody response for type HPV-18

    Time frame: Month 1

    Yes/No for seroconversion, defined as changing from seronegative (antibody titer below established threshold) to seropositive (antibody titer above established threshold) for HPV-18, measured as number of participants.

  11. Short-term HPV type-specific antibody response for type HPV-18

    Time frame: Month 7

    Yes/No for seroconversion, defined as changing from seronegative (antibody titer below established threshold) to seropositive (antibody titer above established threshold) for HPV-18, measured as number of participants.

  12. Short-term HPV type-specific antibody response for type HPV-18

    Time frame: Month 12

    Yes/No for seroconversion, defined as changing from seronegative (antibody titer below established threshold) to seropositive (antibody titer above established threshold) for HPV-18, measured as number of participants.

  13. Short-term HPV type-specific antibody response for type HPV-31

    Time frame: Month 1

    Yes/No for seroconversion, defined as changing from seronegative (antibody titer below established threshold) to seropositive (antibody titer above established threshold) for HPV-31, measured as number of participants.

  14. Short-term HPV type-specific antibody response for type HPV-31

    Time frame: Month 7

    Yes/No for seroconversion, defined as changing from seronegative (antibody titer below established threshold) to seropositive (antibody titer above established threshold) for HPV-31, measured as number of participants.

  15. Short-term HPV type-specific antibody response for type HPV-31

    Time frame: Month 12

    Yes/No for seroconversion, defined as changing from seronegative (antibody titer below established threshold) to seropositive (antibody titer above established threshold) for HPV-31, measured as number of participants.

  16. Short-term HPV type-specific antibody response for type HPV-33

    Time frame: Month 1

    Yes/No for seroconversion, defined as changing from seronegative (antibody titer below established threshold) to seropositive (antibody titer above established threshold) for HPV-33, measured as number of participants.

  17. Short-term HPV type-specific antibody response for type HPV-33

    Time frame: Month 7

    Yes/No for seroconversion, defined as changing from seronegative (antibody titer below established threshold) to seropositive (antibody titer above established threshold) for HPV-33, measured as number of participants.

  18. Short-term HPV type-specific antibody response for type HPV-33

    Time frame: Month 12

    Yes/No for seroconversion, defined as changing from seronegative (antibody titer below established threshold) to seropositive (antibody titer above established threshold) for HPV-33, measured as number of participants.

  19. Short-term HPV type-specific antibody response for type HPV-45

    Time frame: Month 1

    Yes/No for seroconversion, defined as changing from seronegative (antibody titer below established threshold) to seropositive (antibody titer above established threshold) for HPV-45, measured as number of participants.

  20. Short-term HPV type-specific antibody response for type HPV-45

    Time frame: Month 7

    Yes/No for seroconversion, defined as changing from seronegative (antibody titer below established threshold) to seropositive (antibody titer above established threshold) for HPV-45, measured as number of participants.

  21. Short-term HPV type-specific antibody response for type HPV-45

    Time frame: Month 12

    Yes/No for seroconversion, defined as changing from seronegative (antibody titer below established threshold) to seropositive (antibody titer above established threshold) for HPV-45, measured as number of participants.

  22. Short-term HPV type-specific antibody response for type HPV-52

    Time frame: Month 1

    Yes/No for seroconversion, defined as changing from seronegative (antibody titer below established threshold) to seropositive (antibody titer above established threshold) for HPV-52, measured as number of participants.

  23. Short-term HPV type-specific antibody response for type HPV-52

    Time frame: Month 7

    Yes/No for seroconversion, defined as changing from seronegative (antibody titer below established threshold) to seropositive (antibody titer above established threshold) for HPV-52, measured as number of participants.

  24. Short-term HPV type-specific antibody response for type HPV-52

    Time frame: Month 12

    Yes/No for seroconversion, defined as changing from seronegative (antibody titer below established threshold) to seropositive (antibody titer above established threshold) for HPV-52, measured as number of participants.

  25. Short-term HPV type-specific antibody response for type HPV-58

    Time frame: Month 1

    Yes/No for seroconversion, defined as changing from seronegative (antibody titer below established threshold) to seropositive (antibody titer above established threshold) for HPV-58, measured as number of participants.

  26. Short-term HPV type-specific antibody response for type HPV-58

    Time frame: Month 7

    Yes/No for seroconversion, defined as changing from seronegative (antibody titer below established threshold) to seropositive (antibody titer above established threshold) for HPV-58, measured as number of participants.

  27. Short-term HPV type-specific antibody response for type HPV-58

    Time frame: Month 12

    Yes/No for seroconversion, defined as changing from seronegative (antibody titer below established threshold) to seropositive (antibody titer above established threshold) for HPV-58, measured as number of participants.

Study contacts

Contact information is provided by the study sponsor or research team.

Abbey B Berenson, MD, PhD

CONTACT

[email protected]

409-772-2417

Rosalina M Trujillo

CONTACT

[email protected]

409-747-5594

Sponsors and collaborators

Lead sponsor

The University of Texas Medical Branch, Galveston

Other

Collaborators

  • Cancer Prevention Research Institute of Texas

Registry information

Official study title

Comparison of the Immune Response After Administration of 2 vs. 3 Doses of the FDA-approved 9-Valent HPV Vaccine Among Women 27-45 Years of Age

Important dates

Study start
2023
Primary completion
2026
Study completion
2027
First posted
Jan 5, 2023
Registry last updated
Oct 6, 2025

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

Related clinical trials

Published trials that share one or more normalized conditions with this study.