ClinicalTrials.gg
RecruitingNCT04814446VAC-WARTSUpdated Jan 23, 2025

Nonavalent HPV Vaccine in the Treatment of Difficult-to-treat Palmo-plantar Warts

A Phase 3 interventional study of Vaccination in Palmar or Plantar Warts, sponsored by Assistance Publique - Hôpitaux de Paris. Recruiting at 1 site in France. Open to participants aged 15 Years and older. Per ClinicalTrials.gov, last updated 2025-01-23.

Sponsored by Assistance Publique - Hôpitaux de Paris · Phase 3, Interventional, and Treatment

From the registry’s dates

  • Primary completion was expected by Jun 2025, 1 year 4 months ago, but the record still lists the study as recruiting.
  • Started Jun 2022; still recruiting 4 years 4 months later.
Phase
Phase 3
Study type
Interventional
Enrollment
146
Allocation
Randomized
Ages
15 Years and older
Sex
All
01

Study summary

Cutaneous viral warts are very common and are caused by the human papilloma virus (HPV). Most people experience warts in one form or another at some point in their lives. Cutaneous warts are related to different types of HPV. For the palms and soles, HPV 2 has been the most frequently found but HPV 1, 4, 27, and 57 have also been described. Our hypothesis is that vaccination by nonavalent vaccine against HPV could lead to a complete resolution of difficult-to-treat palmo-plantar warts patients of more than 15 years and 3 months of age.

Read the detailed description

The qHPV and nHPV has been used as a therapeutic approached for the treatment of cutaneous warts in case reports and some case series. Very recently, the Journal of the American Academy of Dermatology (JAAD)-the journal with the highest impact factor in the dermatological field- has published a review of all the cases reported in the scientific literature. The authors were strongly in favor of the use of the vaccine in case of difficult-to-treat warts and have highlighted the need for clinical trials. In the literature, 80 patients have been described with cutaneous warts treated by qHPV or nHPV with more than 50% of efficacy.Our hypothesis is that vaccination by nonavalent vaccine against HPV could lead to a complete resolution of difficult-to-treat palmo-plantar warts patients of more than 15 years and 3 months of age.

02

Conditions studied

  • Palmar or Plantar Warts

Browse trials for

Keywords

  • WARTS
  • Vaccine HPV
03

In context

Warts

171 studies on the registry are indexed under Warts; 35 are open to participants now.

This study's planned enrollment of 146 is above the median of 70 across 155 interventional studies indexed under Warts.

Browse Warts studies →

Lead sponsor

Assistance Publique - Hôpitaux de Paris is the lead sponsor of 3,592 studies on the registry; 1,033 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
15 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Patients of age ≥ 15 years and 3 months with palmar or plantar warts (including periungueal and back of hands or feet warts) since more than one year with:
  • ≥ 5 warts (X palmar and X plantar) or
  • ≥ 4 cm2 of Total surface involved by the warts (Y cm x Z cm).
  • Patients should have received two during the past year before inclusion, the last treatment must be at 3 weeks maximum before inclusion:
  • At total one month of application of topical salicylic acid, with minimum 3 weeks continuous.
  • At least two sprays of liquid nitrogen (two applications at the same session, or at different sessions with a few intervals).
  • Painful warts (VAS ≥ 4) or functional discomfort (Revised foot function index (RFFI) or Cochin Hand Function Scale (CHSF) or social discomfort (DLQI)).
  • No topical or systemic immunosuppresive/ immunomodulating drugs
  • Women of must have a negative pregnancy test and an effective (V1) and up the end of the vaccination period of 6 months;
  • Individuals affiliated to a social security regimen;
  • Individuals able to participate and to follow up during the study period.

Exclusion criteria

Exclusion Criteria:

  • Suspicion of COVID, with confirmation by autotest.
  • Any causes of immunosupression: organ transplant recipients, bone-marrow transplantation, immunosupressive regimens for any diseases, positivity.
  • Women or men who received HPV Vaccine previously of the study;
  • Any serious chronic or progressive disease according to the judgement of the investigator;
  • Individuals with history of known allergies/ to any component of study vaccine;
  • Individuals who have any or lymphoproliferative disorder;
  • Individuals with thrombocytopenia or coagulation disorder contre-indicating intramusculary injections;
  • Patient with anticoagulant therapy
  • Individuals with body temperature > 38.0 degrees Celsius or/and acute disease within 3 days of intended study vaccination;
  • Women who are pregnant or are breast-feeding, or are of childbearing age who have not used or do not plan to use acceptable measures, during the first 6 months ½ of the study;
  • Individuals under a measure of legal protection or unable to consent;
  • Individuals participating in any clinical trial with another product 28 days prior to first study visit or intent to participate in another clinical study at any time during the conduct of the study.
  • Participation in another interventional study involving human participants or being in the exclusion period at the end of a previous study involving human participants, if applicable
  • Patient on AME (state medical aid) (unless exemption from affiliation).
  • Patient wishing to be vaccinated with Gardasil 9® within 6 months or refusing the principle of postponing vaccination.
  • therapy including use of systemic or chronic immunosuppressant medication (more than 14 days)
Terms in these criteria, in plain language(9)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Line of therapy

A line of therapy is one course of treatment, which may combine several drugs. First-line is the first course given; second-line follows when that stops working or is not tolerated.

“Two prior lines” means two courses that count separately under the study’s rules — not simply two drugs. Ask the study team if you are unsure how yours are counted.

Childbearing potential

Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).

Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.

Contraception

Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.

Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.

HIV

The human immunodeficiency virus, which weakens the immune system.

Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.

Hypersensitivity

An allergy, or another reaction of the immune system, to a substance. “Hypersensitivity to the study drug” means a known allergic reaction to it — not every side effect a medicine can have.

Cancer (malignancy)

Malignancy means cancer. Criteria about another or earlier malignancy ask whether you have had a different cancer, usually within a set number of years.

Some are commonly allowed, such as treated skin cancers other than melanoma and early cancers removed completely — check the exceptions this study lists.

Investigational drug or device

A drug or device being studied in a clinical trial.

It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.

Immunosuppression

A weakened immune system. It can come from an illness, such as HIV or some blood cancers, or from medicines that turn the immune system down, for example after an organ transplant or for an autoimmune disease; steroids at higher doses count.

Read whether the line is about a condition or about medicines, and which medicines and doses it means.

Corticosteroids (steroids)

Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.

Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.

05

Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Double (Participant, Investigator)
Enrollment
146 participants (estimated)

Study arms

  • Experimental
    Gardasil 9®

    Nonavalent HPV vaccine

    Biological: Vaccination

  • Placebo comparator
    Placebo

    NaCl 0.9 % solution for injection

    Biological: Vaccination

Interventions

  • BiologicalVaccination

    Intramuscular injections of 0,5 ml will be administered at M0, M2 and M6

06

What researchers measure

Primary outcomes

  1. Complete remission of cutaneous warts

    Complete remission of cutaneous warts 7 months after the first injection of the vaccine

    Time frame: 7 months

Secondary outcomes

  1. Quality of Life evaluated

    Quality of Life will be evaluated with QoL Questionnaire (DLQI)

    Time frame: Inclusion, 2 months, 6 months, 7 months

  2. Pain (VAS)

    Pain will be assess using VAS

    Time frame: Inclusion, 2 months, 6 months, 7 months

  3. Functional discomfort for walking and functional disability in hands

    Functional discomfort for walking and functional disability in hands will be evaluated using the Revised Foot Function index or Cochin hand function scale respectively at M0, M2, M6, M7.

    Time frame: Inclusion, 2 months, 6 months, 7 months

  4. Partial remission of cutaneous warts

    Partial remission of cutaneous warts 7 months after the first injection of the vaccine.

    Time frame: 7 months

  5. Number of warts appeared

    Number of warts appeared at M2, M6, M7

    Time frame: Inclusion, 2 months, 6 months, 7 months

07

Study locations

1 of 1 sites recruiting
  • Hospital Cochin
    Paris, 75014, France
    Recruiting
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Started Jun 2022 (actual). Primary completion is estimated for Jun 2025, 36 months after the start.

How these figures are worked out, and which studies are left out of them.

Registered
Mar 22, 2021
First posted
Mar 24, 2021
StartActual
Jun 29, 2022
Primary completionEst.
Jun 29, 2025
CompletionEst.
Jun 29, 2026
Last update
Jan 23, 2025
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Jan 23, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT04814446
Responsible party
Sponsor
First posted
Mar 24, 2021
Start date
Jun 29, 2022
Primary completion
Jun 29, 2025 (estimated)
Completion
Jun 29, 2026 (estimated)
Last update
Jan 23, 2025

Study contacts

Johan CHANAL, Dr
Contact
johan.chanal@aphp.fr
+33 1 58 41 18 25
Olivier CHOSIDOW, Pr
Contact
olivier.chosidow@aphp.fr
+33 1 49 81 21 11
Johan CHANAL, Dr
principal investigator · Hospital Cochin
Olivier CHOSIDOW, Pr
study director · Henri Mondor University Hospital

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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