Vaccine Therapy With or Without Imiquimod in Treating Patients With Grade 3 Cervical Intraepithelial Neoplasia

Cervical Cancer Clinical Trial

Official title: A Phase I Efficacy and Safety Study of HPV16-specific Therapeutic DNA-vaccinia Vaccination in Combination With Topical Imiquimod, in Patients With HPV16+ High Grade Cervical Dysplasia (CIN3)

Status Completed

Clinical Trial Summary

RATIONALE: Vaccines made from DNA or a gene-modified virus may help the body build an effective immune response to kill tumor cells. Biological therapies, such as imiquimod, may stimulate the immune system in different ways and stop tumor cells from growing. Applying topical imiquimod to the cervix may be an effective treatment for cervical intraepithelial neoplasia. Giving vaccine therapy together with imiquimod may kill more tumor cells.

PURPOSE: This phase I trial is studying the side effects and best dose of vaccine therapy and to see how well it works when given with or without imiquimod in treating patients with grade 3 cervical intraepithelial neoplasia.

Clinical Trial Description

OBJECTIVES:

Primary

• To evaluate safety, tolerability, and feasibility of pNGVL4a-Sig/E7(detox)/HSP70 DNA vaccine and TA-HPV vaccine with or without imiquimod in patients with human papillomavirus (HPV)16-positive grade 3 cervical intraepithelial neoplasia (CIN3).

Secondary

• To evaluate the effect of this regimen on histology, based on the regression of cervical intraepithelial neoplasia.

• To evaluate the feasibility and safety of study immunotherapy in these patients.

• To evaluate the quantitative changes in cervical HPV viral load in these patients following study immunotherapy.

• To evaluate changes in lesion size.

• To evaluate the cellular and humoral immune response to vaccination.

• To evaluate local tissue immune response.

• To correlate measures of immune response with clinical response.

• To correlate measures of immune response with those observed in the preclinical model.

• To evaluate if the efficacy of the prime-boost vaccination can be improved with the cervical application of imiquimod.

OUTLINE: This is a dose escalation study of TA-HPV vaccine (groups 1-3 only). Patients are assigned to 1 of 5 treatment groups.

• Groups 1-3: Patients receive pNGVL4a-Sig/E7(detox)/HSP70 DNA vaccine intramuscularly (IM) in weeks 0 and 4 and TA-HPV vaccine IM in week 8.

• Group 4: Patients receive topical imiquimod applied to the cervix once in weeks 0, 4, and 8.

• Group 5: Patients receive pNGVL4a-Sig/E7(detox)/HSP70 DNA vaccine and TA-HPV vaccine as in groups 1-3, and imiquimod as in group 4.

Patients experiencing no improvement of their lesions at week 15 undergo standard cone resection of the squamocolumnar junction. If there is either 1) regression of the size of the lesions by colposcopy and/or 2) no CIN3 lesions detected by colposcopy/biopsy and Pap smear and/or 3) significant decrease of HPV viral load, patients are followed until week 28. At that time, loop electrosurgical excision procedure (LEEP) resection is performed if there is a CIN3 lesion detected by colposcopy/biopsy or suspected by Pap smear. Patients undergoing LEEP are followed until week 32. Patients not undergoing LEEP are followed until week 41 to confirm CIN3 regression.

Blood and tissue samples are collected periodically to measure immune response via ELISA, determine viral load and identify co-infecting HPV types via reverse-line blotting, and analyze lymphocytes via flow cytometry.

PROJECTED ACCRUAL: A total of 36 patients (3 in groups 1 and 2, 12 in groups 3 and 5, and 6 in group 4) will be accrued for this study. ;

Related Conditions & MeSH terms

• Cervical Cancer
• HPV Disease
• Human Papilomavirus
• Precancerous Condition
• Precancerous Conditions
• Uterine Cervical Dysplasia
• Uterine Cervical Neoplasms

• NCT number: NCT00788164
• Study type: Interventional
• Source: Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins
• Status: Completed
• Phase: Phase 1
• Start date: November 2008
• Completion date: August 2023