Phase I Study of West Nile Virus Vaccine
|The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.|
|ClinicalTrials.gov Identifier: NCT00300417|
Recruitment Status : Completed
First Posted : March 8, 2006
Last Update Posted : July 2, 2017
|First Submitted Date ICMJE||March 7, 2006|
|First Posted Date ICMJE||March 8, 2006|
|Last Update Posted Date||July 2, 2017|
|Study Start Date ICMJE||March 3, 2006|
|Primary Completion Date||Not Provided|
|Current Primary Outcome Measures ICMJE||Not Provided|
|Original Primary Outcome Measures ICMJE||Not Provided|
|Change History||Complete list of historical versions of study NCT00300417 on ClinicalTrials.gov Archive Site|
|Current Secondary Outcome Measures ICMJE||Not Provided|
|Original Secondary Outcome Measures ICMJE||Not Provided|
|Current Other Outcome Measures ICMJE||Not Provided|
|Original Other Outcome Measures ICMJE||Not Provided|
|Brief Title ICMJE||Phase I Study of West Nile Virus Vaccine|
|Official Title ICMJE||A Phase I Study of the Safety and Immunogenicity of a West Nile Virus Recombinant DNA Plasmid Vaccine, VRC-WNVDNA020-00-VP, in Healthy Adult Subjects|
This study will test the safety of an experimental vaccine for preventing West Nile virus infection. The virus is spread mainly by mosquito bites. Symptoms can include high fever, headache, neck stiffness, stupor, muscle weakness, vision loss, numbness and paralysis. Rarely, infection leads to permanent nerve damage and possibly death. The vaccine used in the study is made from DNA that codes for West Nile virus proteins. Injected into a muscle, the DNA instructs the body to make a small amount of West Nile virus protein. This study will see if the body creates resistance or immunity to these proteins. Participants cannot get West Nile virus from the vaccine.
Healthy normal volunteers between 18 and 65 years of age may be eligible for this study. Candidates are screened with a medical history, physical examination, and blood and urine tests for various infections and other medical problems. Women who are able to become pregnant are given a pregnancy test. Women who are pregnant or breastfeeding may not participate. Anyone who has received a vaccination for Yellow Fever or Japanese Encephalitis virus in the past may not participate in this research study.
Participants will receive three injections of the experimental vaccine, the first on the first study day (Day 0), the second on Day 28, and the third on Day 56. The injections are given with a device called Biojector® (Registered Trademark) 2000 that delivers the vaccine through the skin into the muscle without the use of a needle. On the day of each injection, subjects are given a diary card to take home for recording their temperature and any symptoms or side effects for 5 days. They return to the clinic 2 weeks after each injection, bringing the completed card with them at that time. In addition to the injections, subjects have the following tests and procedures during clinic visits:
The blood and urine tests are for health checks. Some blood samples are also used to study the immune response to the vaccine and for gene testing.
Study Design: This is a Phase I open-label study to evaluate safety, tolerability, and immunogenicity of a recombinant DNA vaccine, VRC-WNVDNA020-00-VP. The hypothesis is that this regimen will be safe for human administration and elicit a higher titer of neutralizing antibody response than a prior WNV DNA vaccine. The primary objectives are to evaluate the safety and tolerability in humans of the investigational vaccine in healthy young adults and in healthy older adults. Secondary and exploratory objectives are related to the immunogenicity of the study vaccine.
Product Description: VRC-WNVDNA020-00-VP is composed of a single closed-circular DNA plasmid that encodes the WNV viral protein precursor transmembrane (prM) and envelope (E) with a CMV/R promoter. Vaccine vials will be supplied at 4 mg/mL. Each DNA vaccination will be 1 mL of vaccine administered intramuscularly (IM) in the deltoid muscle using the Biojector 2000 Needle-Free Injection Management System (Biojector).
Subjects: A total of 30 healthy adults will be enrolled in two groups: Group 1 will be comprised of 15 healthy adults 18 to 50 years old and Group 2 will be comprised of 15 healthy adults 51 to 65 years old.
Study Plan: All subjects will receive 3 injections on the schedule shown in the schema. The protocol requires nine clinic visits and three telephone follow-up contacts.
Study Duration: 32 weeks of clinical follow up for each participant. A long-term follow-up contact at Week 52 may include interim medical history and research blood draw; or subject may opt for the long-term contact to occur by telephone, e-mail or mail for the interim medical history only.
Study Endpoints: The primary endpoint is safety and tolerability of the regimen. The secondary immunogenicity endpoints are WNV neutralizing antibody, WNV specific antibody as measured by ELISA, WNV-specific T cell responses measured by intracellular cytokine staining (ICS) assay and ELISPOT. Other immunogenicity assays through Week 32 may also be completed as exploratory evaluations, as well as from the Week 52 blood samples if collected.
|Study Type ICMJE||Interventional|
|Study Phase||Phase 1|
|Study Design ICMJE||Primary Purpose: Treatment|
|Condition ICMJE||West Nile Fever|
|Intervention ICMJE||Drug: VRC-WNVDNA020-00-VP|
|Study Arms||Not Provided|
* Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
|Recruitment Status ICMJE||Completed|
|Original Enrollment ICMJE||Same as current|
|Study Completion Date||December 28, 2007|
|Primary Completion Date||Not Provided|
|Eligibility Criteria ICMJE||
A participant must meet all of the following criteria:
No reproductive potential because of menopause (one year without menses) or because of a hysterectomy, bilateral oophorectomy, or tubal ligation,
Participant agrees to be heterosexually inactive at least 21 days prior to enrollment and through Week 32 of the study,
Participant agrees to consistently practice contraception at least 21 days prior to enrollment and through Week 32 of the study by one of the following methods:
A volunteer will be excluded if one or more of the following conditions apply.
Note: The fasting blood tests require 8 hours fast prior to the blood draw. The results used for eligibility screening must be from tests completed no more than 12 weeks (84 days) prior to day of enrollment. The individual criteria for BMI (inclusion item 9), blood pressure (exclusion item 15) and smoking history (exclusion item 23) must also be met.
|Ages||18 Years to 65 Years (Adult, Older Adult)|
|Accepts Healthy Volunteers||Yes|
|Contacts ICMJE||Contact information is only displayed when the study is recruiting subjects|
|Listed Location Countries ICMJE||United States|
|Removed Location Countries|
|NCT Number ICMJE||NCT00300417|
|Other Study ID Numbers ICMJE||060110
|Has Data Monitoring Committee||Not Provided|
|U.S. FDA-regulated Product||Not Provided|
|IPD Sharing Statement||Not Provided|
|Responsible Party||Not Provided|
|Study Sponsor ICMJE||National Institute of Allergy and Infectious Diseases (NIAID)|
|Collaborators ICMJE||Not Provided|
|Investigators ICMJE||Not Provided|
|PRS Account||National Institutes of Health Clinical Center (CC)|
|Verification Date||December 28, 2007|
ICMJE Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP