Safety and Immunogenicity of a Zika Virus DNA Vaccine, VRC-ZKADNA085-00-VP, in Healthy Adults

Sponsor

National Institute of Allergy and Infectious Diseases (NIAID) (NIH)

Overall Status

Completed

CT.gov ID

NCT02840487

Collaborator

(none)

Enrollment

Locations

Arms

31.3

Duration (Months)

26.7

Patients Per Site

0.9

Patients Per Site Per Month

Study Details

Study Description

Brief Summary

Background:

The Zika virus is passed to humans by infected mosquitos. It usually causes fever, rash, joint pain, and red eyes. Recently, some cases of microcephaly (abnormally small head) were reported in babies born to mothers infected with the Zika virus. Rare cases of a severe nerve weakness called Guillain-Barr(SqrRoot)(Copyright) syndrome were reported in some people with Zika virus infection. There is currently no cure for or vaccine against the infection. VRC-ZKADNA085-00-VP is a new vaccine that instructs the body to make a small amount of Zika virus protein. The body may use this to build an immune response.

Objective:

To see if VRC-ZKADNA085-00-VP is safe and causes any side effects.

Eligibility:

Healthy people ages 18 35

Design:

Participants will be screened through a separate protocol with:

Medical history
Physical exam
Lab and urine tests

Participants will be randomly assigned to 1 of 4 study groups. They will have about 18 clinic visits over 2 years. Most will occur in the first year, with long-term follow-up visits at months 18 and 24. Visits include a physical exam and blood and urine tests.

Participants will have vaccine injections. A high-pressure device pushes the vaccine through the skin and into the muscle of the upper arm. They will have 2-3 injections depending on their group.

Vaccine visits last 4-6 hours. Others last 1-2 hours.

Participants will keep a diary for 7 days after each injection. They will record their temperature and measure any skin changes at the injection site each day.

Participants might have extra visits and blood tests if they have health changes.

Condition or Disease	Intervention/Treatment	Phase
Prevention of Zika Infection Zika-Specific Immune Response	Biological: VRC-ZKADNA085-00-VP	Phase 1

Detailed Description

Study Design:

This is a Phase I/Ib, randomized, multicenter clinical study to evaluate the safety, tolerability, and immunogenicity of four vaccination regimens against Zika virus (ZIKV) disease. Vaccination regimens with the VRC-ZKADNA085-00-VP (ZIKV DNA) vaccine administered on Day 0 and Week 8 (Group 1); on Day 0 and Week 12 (Group 2); on Day 0, Weeks 4 and 8 (Group 3); and on Day 0, Weeks 4 and 20 (Group 4) will be tested. The primary hypothesis is that the ZIKV DNA vaccine will be safe and well tolerated in healthy adults. A secondary hypothesis is that all vaccine regimens will elicit a ZIKV-specific immune response. The primary objectives are to evaluate the safety and tolerability of the investigational vaccine regimens in healthy adults. Secondary objectives are related to the immunogenicity of the vaccination regimens.

Product Description:

The investigational VRC-ZKADNA085-00-VP vaccine was developed by the Vaccine Research Center (VRC), NIAID, and is composed of a single closed-circular DNA plasmid that encodes the wild type precursor transmembrane M (prM) and envelope (E) proteins from the H/PF/2013 strain of ZIKV. Vaccine is supplied in single dose vials at a concentration of 4 mg/mL. ZIKV DNA vaccine dose will be 4 mg administered as an intramuscular (IM) injection in the deltoid muscle.

Subjects:

Healthy adults 18 to 35 years of age.

Study Plan:

Subjects will be enrolled at up to 3 study sites, randomized equally into the 4 study groups, and will receive 2-3 vaccinations. The protocol requires up to 18 scheduled clinic visits and a telephone follow-up contact after each study injection. Solicited reactogenicity will be evaluated using a 7-day diary card. Assessment of vaccine safety will include clinical observation and monitoring of hematological and chemical parameters at clinical visits through the 44 weeks on the study.

-VRC 319 Study Schema

Group:1; Subjects*: 20; Day 0; Week 8;
Group:2; Subjects*: 20; Day 0; Week 12;
Group:3; Subjects*: 20; Day 0; Week 4; Week 8;
Group:4; Subjects*: 20; Day 0; Week 4; Week 20;
TOTAL; Subjects*: 80
Up to 120 total enrollments are permitted if additional subjects are needed for assessment of safety and immune responses.

Study Duration:

Subjects will be evaluated for safety and immune responses throughout the study for 44 weeks following the first vaccine administration and for durability of immune responses at two additional long term follow-up visits at 18 and 24 months.

Study Design

Study Type:

Interventional

Actual Enrollment :

80 participants

Allocation:

Randomized

Intervention Model:

Parallel Assignment

Masking:

None (Open Label)

Primary Purpose:

Prevention

Official Title:

VRC 319: A Phase I/Ib, Randomized Clinical Trial to Evaluate the Safety and Immunogenicity of A Zika Virus DNA Vaccine, VRC-ZKADNA085-00-VP, in Healthy Adults

Study Start Date :

Aug 2, 2016

Actual Primary Completion Date :

Mar 14, 2019

Actual Study Completion Date :

Mar 14, 2019

Arms and Interventions

Arm	Intervention/Treatment
Experimental: Group 1 ZIKV DNA vaccine administered IM at a dosage of 4mg, as two 0.5ml injections on Day 0 and Week 8.	Biological: VRC-ZKADNA085-00-VP VRC-ZKADNA085-00-VP is an investigational ZIKV DNA vaccine that is intended to prevent Zika virus infection.
Experimental: Group 2 ZIKV DNA vaccine administered IM at a dosage of 4mg, as two 0.5ml injections on Day 0 and Week 12.	Biological: VRC-ZKADNA085-00-VP VRC-ZKADNA085-00-VP is an investigational ZIKV DNA vaccine that is intended to prevent Zika virus infection.
Experimental: Group 3 ZIKV DNA vaccine administered IM at a dosage of 4mg, as two 0.5ml injections on Day 0, Week 4 and Week 8.	Biological: VRC-ZKADNA085-00-VP VRC-ZKADNA085-00-VP is an investigational ZIKV DNA vaccine that is intended to prevent Zika virus infection.
Experimental: Group 4 ZIKV DNA vaccine administered IM at a dosage of 4mg, as two 0.5ml injections on Day 0,Week 4 and Week 20.	Biological: VRC-ZKADNA085-00-VP VRC-ZKADNA085-00-VP is an investigational ZIKV DNA vaccine that is intended to prevent Zika virus infection.

Outcome Measures

Primary Outcome Measures

To evaluate the safety and tolerability of four vaccination regimens with ZIKV DNA vaccine (VRC-ZKADNA085-00-VP) administered IM at 4 mg. [Through 44 weeks of study participation]

Secondary Outcome Measures

To evaluate the magnitude and frequency of ZIKV-specific antibodyresponse as measured by neutralization assay. [Four weeks after the second and third injections for each regimen.]

Eligibility Criteria

Criteria

Ages Eligible for Study:

18 Years to 35 Years

Sexes Eligible for Study:

All

Accepts Healthy Volunteers:

INCLUSION CRITERIA:

18 to 35 years old
Available for clinic visits for 24 months after enrollment
Able to provide proof of identity to the satisfaction of the study clinician completing the enrollment process
Able and willing to complete the informed consent process
Willing to donate blood for sample storage to be used for future research
In good general health without clinically significant medical history
Physical examination and laboratory results without clinically significant findings and a Body Mass Index (BMI) less than or equal to 40 within the 56 days prior to enrollment
Agrees not to receive licensed or investigational flavivirus vaccines through 4 weeks after last study injection

INCLUSION CRITERIA - LABORATORY CRITERIA WITHIN 56 DAYS PRIOR TO ENROLLMENT:

Hemoglobin within institutional normal limits or accompanied by the site PI or designee approval
WBC and differential either within institutional normal range or accompanied by site PI or designee approval
Total lymphocyte count greater than or equal to 800 cells/mm^3
Platelets = 125,000 - 500,000/mm^3
Alanine aminotransferase (ALT) less than or equal to 1.25 x institutional upper limit of normal (ULN)
Serum creatinine less than or equal to 1.1 x institutional ULN
Negative for HIV infection by an FDA approved method of detection

INCLUSION CRITERIA - CRITERIA APPLICABLE TO WOMEN OF CHILDBEARING POTENTIAL:

Negative human chorionic gonadotropin (beta-HCG) pregnancy test (urine or serum) on day of enrollment
Agrees to use an effective means of birth control from at least 21 days prior to enrollment through 12 weeks after the last study vaccination

EXCLUSION CRITERIA - FEMALE-SPECIFIC:

Breast-feeding or planning to become pregnant while participating through 12 weeks after the last study vaccination

EXCLUSION CRITERIA - SUBJECT HAS RECEIVED ANY OF THE FOLLOWING:

More than 10 days of systemic immunosuppressive medications or cytotoxic medications within the 4 weeks prior to enrollment or any within the 14 days prior to enrollment
Blood products within 16 weeks prior to enrollment
Inactivated vaccines within 2 weeks prior to enrollment
Live attenuated vaccines within 4 weeks prior to enrollment
Investigational research products within 4 weeks prior to enrollment or planning to receive investigational products while on the study
Current allergen immunotherapy with antigen injections, unless on maintenance schedule
Current anti-TB prophylaxis or therapy

EXCLUSION CRITERIA - SUBJECT HAS A HISTORY OF ANY OF THE FOLLOWING CLINICALLY

SIGNIFICANT CONDITIONS:

Laboratory confirmed ZIKV infection by self-report
Serious reactions to vaccines that preclude receipt of study vaccinations as determined by the site investigator
Hereditary angioedema, acquired angioedema, or idiopathic forms of angioedema
Asthma that is not well controlled
Diabetes mellitus (type I or II), with the exception of gestational diabetes
Evidence of autoimmune disease or immunodeficiency
Idiopathic urticaria within the past year
Hypertension that is not well controlled
Bleeding disorder diagnosed by a doctor (e.g. factor deficiency, coagulopathy, or platelet disorder requiring special precautions) or significant bruising or bleeding difficulties with IM injections or blood draws
Malignancy that is active or history of malignancy that is likely to recur during the period of the study
Seizure disorder other than: 1) febrile seizures, 2) seizures secondary to alcohol withdrawal more than 3 years ago, or 3) seizures that have not required treatment within the last 3 years
Asplenia, functional asplenia or any condition resulting in the absence or removal of the spleen
Guillain-Barre Syndrome, Bell s palsy or similar neurological conditions
Psychiatric condition that precludes compliance with the protocol; past or present psychoses; or within 5 years prior to enrollment, a history of suicide plan or attempt
Any medical, psychiatric, social condition, occupational reason or other responsibility that, in the judgment of the investigator, is a contraindication to protocol participation or impairs a volunteer s ability to give informed consent

Contacts and Locations

Locations

	Site	City	State	Country	Postal Code
1	Hope Clinic - Emory Vaccine Ctr	Decatur	Georgia	United States	30030
2	University of Maryland Ctr. for Vaccine Development	Baltimore	Maryland	United States	21201
3	National Institutes of Health Clinical Center	Bethesda	Maryland	United States	20892