Phase II Study of Treatment for HPV16+ ASC-US, ASC-H and LSIL

Phase 2

Terminated

• Conditions: ASC-H; ASC-US; LSIL
• Interventions: Biological: PVX-2; Other: Placebo

• Registration Number: NCT03911076
• Lead Sponsor: PapiVax Biotech, Inc.

Brief Summary

* To evaluate the safety and tolerability of the dual IM pNGVL4a Sig/E7(detox)/HSP70 DNA and single IM TA-CIN immunization regimen

* To evaluate the efficacy of dual IM pNGVL4a-Sig/E7(detox)/HSP70 DNA and single IM TA-CIN immunization regimen on Human Papillomavirus (HPV) 16 clearance by Month 6

Detailed Description

Patients with human papillomavirus type 16 (HPV16) infection and low-grade cervical dysplasia \[low-grade squamous intraepithelial lesion (LSIL)/CIN1\] or atypical squamous cells \[atypical squamous cells of undetermined significance (ASC-US)/atypical squamous cells- cannot exclude high-grade squamous intraepithelial lesion (ASC-H)\] require active surveillance for disease progression. A safe and effective immunotherapy to clear HPV16 is an unmet medical need. This study (NCT03911076) is a randomized double-blind, placebo-controlled phase II trial of PVX2 \[vaccination twice with HPV16-targeting pNGVL4a-Sig/E7(detox)/HSP70 plasmid and once with the HPV16 L2E7E6 fusion protein "TA-CIN"\] as immunotherapy for patients with HPV16+ ASC-US, ASC-H, or LSIL/CIN1. The primary objective of this cohort is to determine the safety and tolerability of PVX2 in three monthly immunizations. Subjects are confirmed to have HPV16 infection and LSIL/CIN1, ASC-US, or ASC-H. Adverse events are evaluated using Common Terminology Criteria for Adverse Events v5.0. HPV typing by HPV16 18/45 Aptima Assay is performed at baseline, month 6, and month 12, with simultaneous cytology analysis. Cervical biopsies and endocervical curettage are performed at baseline and month 6. In a safety run-in cohort 12 eligible patients are enrolled prior to the randomized phase.

Study Timeline

• Study First Submitted: 2019-04-05
• Study First Submitted QC: 2019-04-09
• Study First Posted: 2019-04-10
• Study Start: 2019-05-22
• Primary Completion: 2022-06-08
• Study Completion: 2022-06-08
• Status Verified: 2024-06
• Last Update Submitted: 2024-06-13
• Last Update Posted: 2024-06-17

Recruitment & Eligibility

• Status: TERMINATED
• Sex: Female
• Target Recruitment: 16

Inclusion Criteria

1. Female subjects age 25-70 years with confirmation of ASC-US, ASC-H, or LSIL by liquid-based cytology
2. HIV uninfected
3. Patients whose cytologic specimen is HPV16+ by Aptima HPV 16 18/45 Genotype Assay
4. Body Mass Index ≤ 32 kg/m2
5. Hepatitis B surface antigen negative
6. Anti-hepatitis C virus antibody (anti-HCV) negative or negative HCV PCR if anti-HCV positive
7. Patients who are able and willing to comply with all study procedures and voluntarily sign an informed consent form, and with anticipated availability for the planned follow-up period of one year
8. Patients who are of childbearing potential agree to remain sexually abstinent, use methods of contraception (e.g. oral contraception, barrier methods, spermicide, intrauterine device (IUD)), or have a partner who is sterile (i.e., vasectomy) through 6 months.
9. Patients must have adequate organ function at the time of enrollment as defined by the following parameters: white blood cell count >3,000/mcL; lymphocyte number >500/mcL; absolute neutrophil count >1,000/mcL; platelets >90,000/mcL; hemoglobin >9 g/dL; total bilirubin <3 X the institutional limit of normal; aspartate aminotransferase (AST [SGOT]) / alanine aminotransferase (ALT [SGPT]) <3 X the institutional limit of normal; creatinine <2.5X the institutional limit of normal.
10. Histologic diagnosis of <CIN2 upon screening colposcopic examination with mandatory ECC, and cervical biopsy(ies) as clinically indicated.

Exclusion Criteria

1. Patients who are attempting pregnancy within 6 months, pregnant, or breastfeeding.
2. Patients with immunodeficiency, or treatment with immunosuppressive medications
3. Administration of any blood product within 3 months of enrollment.
4. Administration of any licensed vaccine within 2 weeks of enrollment (4weeks for measles vaccine)
5. Participation in a study with an investigational compound or device within 30 days of signing informed consent.
6. History of seizures (unless seizure free for 5 years)
7. Patients with positive serological test for human immunodeficiency virus (HIV).
8. Previous cancer history within the past 5 years.
9. Patients who have had chemotherapy, radiation, biological cancer therapy, or other investigational agents within 28 days prior to the first dose of study drug.
10. Patients who have had surgery within 28 days, excluding minor procedures (dental work, skin biopsy, etc).
11. Patients with an uncontrolled intercurrent illness including, but not limited to, ongoing, or active infection, symptomatic congestive heart failure, unstable angina pectoris, cardiac arrhythmia, or psychiatric illness/social situations that would limit compliance with study requirements.
12. Patients who have an active autoimmune disease (e.g., rheumatoid arthritis, systemic lupus erythematosus (SLE), ulcerative colitis, Crohn's Disease, multiple sclerosis (MS), ankylosing spondylitis).
13. Patients with a recognized immunodeficiency disease including cellular immunodeficiencies, hypogammaglobulinemia, or dysgammaglobulinemia; patients who have acquired, hereditary, or congenital immunodeficiencies; patients being chronically treated with immunosuppressive drugs such as cyclosporin, adrenocorticotropic hormone (ACTH), or systemic corticosteroids
14. Previous cervical conization or LEEP procedure or previous total hysterectomy due to cervical lesions at enrollment.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
PVX-2	PVX-2	Prime: 3 mg pNGVL4a-Sig/E7(detox)/HSP70 DNA Boost: 0.1 mg TA-CIN protein
Placebo	Placebo	Prime: PBS (Phosphate Buffered Saline) Boost: PGC (Phosphate Glycine Cysteine Buffer)

Primary Outcome Measures

Name	Time	Method
Incidence of Treatment-Emergent Adverse Events as assessed by CTCAE v5.0	12 months	To evaluate the safety and tolerability of the dual IM pNGVL4a Sig/E7(detox)/HSP70 DNA and single IM TA-CIN immunization regimen
Percent of patients that have cleared HPV16 at Month 6	6 months	To evaluate the efficacy of dual IM pNGVL4a-Sig/E7(detox)/HSP70 DNA and single IM TA-CIN immunization regimen on Human Papillomavirus (HPV) 16 clearance by Month 6

Secondary Outcome Measures

Name	Time	Method
Percent of patients that have normal cytology at Month 6	6 months	To evaluate the efficacy of dual IM pNGVL4a-Sig/E7(detox)/HSP70 DNA and single IM TA-CIN immunization regimen on regression to cytology with no evidence of intraepithelial lesion or malignancy (NILM) at Month 6
Percent of patients that have cleared HPV16 at Month 12	12 months	To evaluate the efficacy of dual IM pNGVL4a-Sig/E7(detox)/HSP70 DNA and single IM TA-CIN immunization regimen on maintenance of Human Papillomavirus (HPV) 16 clearance by Month 12

Trial Locations

Locations (6)

Corpus Christi Women's Clinic (Elligo Health Research, Inc.); 🇺🇸 Corpus Christi, Texas, United States

Obstetrics & Gynecology Associates, Inc.; 🇺🇸 Fairfield, Ohio, United States

Health Awareness, Inc.; 🇺🇸 Port Saint Lucie, Florida, United States

MacArthur Medical Center; 🇺🇸 Irving, Texas, United States

University Hospital, Rutgers New Jersey Medical School; 🇺🇸 Newark, New Jersey, United States

Austin Area Obstetrics, Gynecology, and Fertility; 🇺🇸 Austin, Texas, United States