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A phase II study to determine the efficacy and safety of Vvax001, a therapeutic Semliki Forest Virus based cancer vaccine, in patients with HPV-16 induced grade 3 cervical intraepithelial neoplasia.

A phase II study to determine the efficacy and safety of Vvax001, a therapeutic Semliki Forest Virus based cancer vaccine, in patients with HPV-16 induced grade 3 cervical intraepithelial neoplasia. - Vvax001 cancer vaccine in HPV-16 related disease.

Status
Active, not recruiting
Phases
Phase 2
Study type
Interventional
Source
NL-OMON
Registry ID
NL-OMON55191
Enrollment
18
Registered
2020-02-17
Start date
2021-03-23
Completion date
Unknown
Last updated
2025-11-03

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

cervical neoplasia / cervical cancer

Interventions

and liver function tests. Besides, a pregnancy test will be taken before each&nbsp
Patients will receive three immunizations, with an interval of 3 weeks between&nbsp
each immunization. Each vaccination will be given as two injections
1&nbsp
injection in each leg. The injections will be administered intramuscularly in&nbsp
the upper legs, preferably in the m. vastus lateralis. Patient evaluation will&nbsp
be performed before immunization and during the first follow-up visit (week 7)&nbsp
including history, physical examination, full blood count, urea, electrolytes&nbsp
vaccination. Participants may directly leave the study site after injection of&nbsp
Vvax001. Participants will be contacted by telephone 4-8 hours after&nbsp
immunization to obviate any adverse events (AE's). Peripheral blood mononuclear&nbsp
cells (PBMC) will be collected at baseline, first follow-up visit (week 7),&nbsp
colposcopy (week 9 and week 17) and at time of biopsy (week 25) to monitor&nbsp
HPV-specific immune responses. Colposcopy and digital imaging will be performed&nbsp
after immunization in week 9, in week 17 and in week 25 to monitor regression&nbsp
of the CIN lesions. If full regression of the lesion does not occur, LLETZ will&nbsp
be performed 25 weeks after the first immunization. LLETZ will also be&nbsp
performed if progression occurs (proven by biopsy) during the study. When&nbsp
complete regression of the CIN3 lesion is observed by colposcopy, a biopsy will&nbsp
be taken in week 25 to confirm regression. In this case, no LLETZ will be&nbsp

Sponsors

Universitair Medisch Centrum Groningen
Lead Sponsor

Eligibility

Age
18 Years to 99 Years

Inclusion criteria

Inclusion criteria: Adult female patients (>=18 years) who have newly been diagnosed with HPV-16  positive CIN3 lesions and have signed written informed consent according to  local guidelines. Patients of child-bearing potential should test negative  using a pregnancy test and agree to utilize effective contraception during the  entire treatment and follow-up period of the study.

Exclusion criteria

Exclusion criteria: * PAP5 lesions. * Previously undergone treatment for CIN lesions. * Adenocarcinoma in situ within CIN3 lesion * History of autoimmune disease or other systemic intercurrent disease that  might affect the immunocompetence of the patient, or current or prior use (4  weeks before start of the study) of high dose immunosuppressive therapy.  * History of a malignancy except curatively treated low-stage tumors with a  histology that can be differentiated from the cervical cancer type.  * Participation in a study with another investigational drug within 30 days  prior to the enrolment in this study.  * Clinically significant findings as judged by the investigator on  screening/study entry including those from biochemistry, haematology and  urinalysis performed at screening.  * Any condition that in the opinion of the investigator could interfere with  the conduct of the study.  * Pregnancy.

Design outcomes

Primary

MeasureTime frame
Primary study endpoint is clinical efficacy of Vvax001. To assess vaccine induced clinical responses, histology of the pre-treatment diagnostic biopsy will be compared to histology of the post- treatment therapeutic biopsy/LLETZ. A positive response is defined as a reduction from CIN3 to CIN1, or a change from CIN3 to no dysplasia.

Secondary

MeasureTime frame
Secondary endpoints are 1) the immunological activity of Vvax001 by monitoring HPV-16 E6,7-specific T-cell immune responses in peripheral blood at baseline, week 7, week 9, week 17 and week 25; 2) HPV16 clearance; and 3) potential side effects/adverse events related to Vvax001.

Countries

Netherlands

Outcome results

None listed

Source: NL-OMON (via WHO ICTRP)