Clinical trial NCT01375868: Effect of Vaccination in Patients With Recurrent Respiratory Papillomatosis
Official title: Phase IIIb Study of Recombinant Tetravalent HPV Vaccine in Patients With Recurrent Respiratory Papillomatosis
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: PHASE3
Conditions: Squamous Papilloma of the Larynx
Keywords: HPV
recurrent respiratory papillomatosis
antibodies
Lead sponsor: Institute of Hematology and Blood Transfusion, Czech Republic
Sponsor class: OTHER
Collaborators: name: Medical Healthcom Prague
name: Na Homolce Hospital
First posted: 2011-06-17
Enrollment: 51
Sex: ALL
Minimum age (years): 18
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: NA
Intervention model: SINGLE_GROUP
Primary purpose: TREATMENT

Brief summary: Vaccines against human papillomaviruses are now commercially available. One of the commercial vaccine contains antigens of both LR HPV types which cause virtually all cases of RRP. Clinical trials have documented the safety and immunogenicity of this vaccine as well as its effectiveness in prevention of incident and persistent infection of the vaccinal types as well as a development of lesions caused by these types. After vaccination the antibodies level increases dramatically and the high levels of antibodies are present in the blood still after 6 years. Furthermore, the neutralization antibodies to the vaccinal antigens have been detected in the cervical mucus of vaccinated women. The preliminary data are now available showing the presence of HPV-specific antibodies in the oral cavity in women after vaccination. The level of antibodies has been dependent on time since vaccination.

Detailed description: In our previous studies we have documented that in patients with RRP the level of HPV-specific antibodies is low and increases only after numerous surgery procedures. Therefore the application of this vaccine to patients with RRP can stimulate increased level of antibodies in the blood as well as presence of virus-specific neutralization antibodies on the surface of upper aero digestive tract and neutralize viruses shed from new papillomas and in this way protect patient from spreading of the infection as well as to facilitate the decrease of load of infectious virus shed from the lesion. This can possibly lead to the inhibition of growth of the papillomatous lesion.

Eligibility criteria: Inclusion Criteria:

Patients with RRP which sign the informed consent form with both parts of the study will be enrolled.

Exclusion Criteria:

Patients who experience severe side effects of vaccination after the first or second dose will not be vaccinated with the third dose and they will be excluded from the study. Patients who will not receive all three doses within one year and 30 days will be also excluded.

Primary outcomes:
measure: occurrence or frequency of recurrences of laryngeal papillomatosis
timeFrame: 5 years
Secondary outcomes:
measure: HPV type present in the tissue
timeFrame: 2 years
measure: the presence of HPV specific antibodies
timeFrame: 5 years
Other outcomes:
Locations:
city: Prague
country: Czechia
facility: Institute of Hematology and Blood Transfusion
Study officials:
affiliation: Institute of Hematology and Blood Transfusion
name: Ruth Tachezy, PhD.
role: PRINCIPAL_INVESTIGATOR
References:
citation: Tachezy R, Hamsikova E, Valvoda J, Van Ranst M, Betka J, Burk RD, Vonka V. Antibody response to a synthetic peptide derived from the human papillomavirus type 6/11 L2 protein in recurrent respiratory papillomatosis: correlation between Southern blot hybridization, polymerase chain reaction, and serology. J Med Virol. 1994 Jan;42(1):52-9. doi: 10.1002/jmv.1890420111.
citation: Smahelova J, Hamsikova E, Ludvikova V, Vydrova J, Traboulsi J, Vencalek O, Lukes P, Tachezy R. Outcomes After Human Papillomavirus Vaccination in Patients With Recurrent Respiratory Papillomatosis: A Nonrandomized Clinical Trial. JAMA Otolaryngol Head Neck Surg. 2022 Jul 1;148(7):654-661. doi: 10.1001/jamaoto.2022.1190.