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DenguePhase 2NCT00370682

A Phase II Trial of a Live Attenuated Virus Tetravalent Dengue Vaccine in Healthy Adults in Thailand

A Phase 2 study testing T-DEN F17 and T-DEN F-19 in people with Dengue, run by U.S. Army Medical Research and Development Command at 1 site in Thailand.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

This descriptive study will evaluate the safety and immunogenicity of different formulations of the WRAIR dengue vaccine compared to a placebo. Read more about this study

Who is it for?
Ages 20 to 25 yearsHealthy volunteers can take part
Conditions the study is for
Dengue
What is being tested?
T-DEN F17 and T-DEN F-19
Could I receive a placebo?
Yes, some participants may receive a placebo
How many people
120 participants
Where
1 siteThailand
Study dates
Apr 2007to Feb 2008
Phase
Phase 2
Are there results?
Yes, posted in the registrySummary in the doctors' view

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 20 to 25 years
  • All sexes
  • Healthy volunteers accepted
  • Adult

Who may be able to join

  • A healthy male or female adult 20-25 years of age (≥20 years of age and ≤25 years of age) at the time of vaccination;
  • Free of obvious health problems as established by medical history and physical examination before entering into the study;
  • Written informed consent obtained from the subject;
  • Able to read the Subject Information Sheet and Consent Form;
  • Subjects who the investigator believes can and will comply with the requirements of the protocol (e.g., completion of the diary cards, return for follow-up visits) should be enrolled in the study;
  • females must be of non-childbearing potential, i.e. surgically sterilized or, if of childbearing potential, she must be abstinent or on adequate contraceptive precautions (i.e. intrauterine contraceptive device; oral contraceptives or other equivalent hormonal contraception, e.g. progestin implantable, cutaneous hormonal patch or injectable contraceptives) for 30 days prior to vaccination, have a negative pregnancy test within 48 hours prior to vaccination and must agree to continue such precautions for 60 days after completion of the vaccination series

Who cannot join

  • Pregnant or lactating female, planning to become pregnant or planning to discontinue abstinence or contraceptive precautions;
  • History of any neurological or behavioral disorder or seizures, with the exception of a single febrile seizure in childhood;
  • History of drug abuse or alcohol consumption (more than 2 drinks per day);
  • History of allergic disease/reaction likely to be exacerbated by any component of the vaccine;
  • Acute or chronic, pulmonary, cardiovascular, hepatic, renal, hematologic or endocrine functional defect, as determined by physical examination or laboratory tests;
  • Any confirmed or suspected immunosuppressive or immunodeficient condition or seropositive for HBsAg, anti-HCV or anti-HIV;
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  • Acute disease at the time of enrollment (acute disease is defined as the presence of a moderate or severe illness with or without fever);
  • Chronic hepatomegaly, right upper quadrant abdominal pain or tenderness;
  • Chronic splenomegaly, left upper quadrant abdominal pain or tenderness;
  • Hypertension; chest pain, palpitations, dizziness, shortness of breath, arrhythmias or friction rubs;
  • Use of any investigational or non-registered drug or vaccine other than the study vaccine within 30 days preceding the study vaccine (includes placebo) or planned use during the study period;
  • Planned administration of a vaccine not foreseen by the study protocol during the period starting from 30 days before the first dose of the study vaccine/placebo and ending 30 days after the second dose;
  • A planned move to a location that will prohibit participating in the trial for 9 months after the initial vaccination;
  • Chronic administration (defined as more than 14 days) of immunosuppressants or other immune-modifying drugs within 90 days preceding the first dose or planned administration during the study period. For corticosteroids, this will mean prednisone, or equivalent, 0.5 mg/kg/day. Inhaled and topical steroids are allowed;
  • Administration of immunoglobulins and/or blood products within 90 days preceding the first dose or planned administration during the study period;
  • Any chronic systemic drug therapy to be continued during the study period (except for vitamin/mineral supplements or routine treatment for gastro-esophageal reflux);
  • No easy access to a fixed or mobile telephone

Trial locations and contacts

1 site in 1 country.

Thailand1 site
  • Phramongkutklao Hospital

    Bangkok

Other trials in Thailand

About this study

Official title: Phase II, Randomized, Double-blind, Single Center, Controlled Study of Two Doses of Different Formulations of the WRAIR Live Attenuated Tetravalent Dengue Vaccine Compared to a Placebo Control, Administered on a 0-6 Month Schedule, to Healthy Adults

This descriptive study will evaluate the safety and immunogenicity of different formulations of the WRAIR dengue vaccine compared to a placebo.

Read the detailed description

Subjects will be randomized into one of three groups. One group will receive a placebo vaccine and the other two will receive different dengue vaccine formations. Each subject will receive two doses six months apart. All subjects will have 11 venipunctures during 11 visits (i.e., screening plus 10 study visits) over a period of nine months.

Conditions
Dengue
Being tested
T-DEN F17, T-DEN F-19, Placebo Comparator
Medical subject headings
Dengue

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • T-DEN F17Biological

    Also called T-DEN vaccine

    A single dose of 0.5 mL of the dengue vaccine was injected subcutaneously into the upper-outer triceps/deltoid area of the non-dominant arm at Day 0 and at 6 months.

  • T-DEN F-19Biological

    A single dose of 0.5 mL of the dengue vaccine was injected subcutaneously into the upper-outer triceps/deltoid area of the non-dominant arm at Day 0 and at 6 months.

  • Placebo ComparatorOther

    A single dose of 0.5 mL of the placebo sterile solution of buffer identical in appearance to vaccine)was injected subcutaneously into the upper-outer triceps/deltoid area of the non-dominant arm at Day 0 and at 6 months.

Study groups in NCT00370682
Study groupRoleWhat they receive
T-DEN F17ExperimentalFull Dose (0.5 mL) 0 and 6 months
Receives: Biological: T-DEN F17
T-DEN F19ExperimentalFull Dose (0.5 mL) at 0 and 6 months
Receives: Biological: T-DEN F-19
Placebo ComparatorPlacebo comparator0.5 mL sterile buffer at 0 and 6, subcutaneous injection
Receives: Other: Placebo Comparator

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Incidence of Any Grade 3 Solicited Adverse Events (AEs) Within 21 Days Follow-up After Dose 1

    Percentage of subjects with any grade 3 adverse events (AEs) within 21 days follow-up after dose 1 (0 month)

    Measured: 0-21 days after dose 1

  2. Neutralizing Antibody Geometric Mean Titer (GMT) to DEN Types 1, 2, 3 and 4; 30 and 90 Days After Dose 2

    Neutralizing antibody geometric mean titer (GMT) to DEN types 1, 2, 3 and 4 will be measured 30 and 90 days following the administration of the 2nd dose (6 month)

    Measured: 30 and 90 days after dose 2

Secondary outcomes (9)
  1. Subjects With Any Adverse Events (AEs) Within 21 Days Follow-up After Dose 2 of Study Vaccine

    Percentage of subjects with any adverse events (AEs) solicited and unsolicited reported during the 21-day post-vaccination period following dose 2

    Measured: 0-21 days after dose 2 of study vaccine

  2. Incidence of Unsolicited AEs Within 31 Days (Days 0-30) After Any Study Vaccine Dose

    Incidence of unsolicited AEs reported within the 31-day (Days 0-30) post-vaccination period for each study vaccine

    Measured: 0-30 days after each study vaccine dose

  3. Incidence of Serious Adverse Events (SAEs) Throughout the Entire Study Period

    Number of subjects experiencing serious adverse events (SAEs) throughout the entire 9 month study period

    Measured: 9 months

  4. Laboratory Values Above the Alert Values Within 31 Days (Days 0-30) After Each Vaccine Dose

    Laboratory valuesabove the alert values within 31 days (days 0-30) after each vaccine dose. Change from baseline in hematological and biochemical levels with respect to normal ranges.

    PI(D2, 5, 8, 12) = Post Dose 1, Days 2, 5, 8 and 12 PI(D5, 12,14) = Post Dose 1, Days 5, 12 and 14 PI(M1) = Post Dose 1, Month 1 PI(M6) = Post Dose 1, Month 6 PII(D2, 5, 8, 12) = Post Dose 2, Days 2, 5, 8 and 12 PII(D5, 8, 12, 14) = Post Dose 2, Days 5, 8, 12 and 14 PII(M7) = Post Dose 2, Month 7

    Measured: within 31 days after each vaccine dose

  5. Incidence of Abnormal Findings at DEN Physical Examination After Each Vaccine Dose

    Incidence of abnormal dengue examination findings reported during the 31-Day (Days 0-30) post-vaccination period, per dose

    Measured: 31 days post-vaccination per dose

  6. Incidence of Suspected and Confirmed Dengue Throughout the Entire Study Period.

    Number of subjects with incidence of suspected and confirmed dengue throughout the entire study period.

    Measured: 9 months

  7. Percentage of Subjects With Neutralizing Antibodies to Each DEN Type, After Each Dose of Study Vaccines

    Percentage of subject with Tetravalent responses for neutralizing antibodies, according to pre-vaccination dengue immune status. There was no placebo run for DEN Monovalent.

    PRE = Pre-vaccination PI(M1) = Post Dose 1, Month 1 PII(M7) = Post Dose 2, Month 7

    Measured: post dose 1 and 2

  8. Neutralizing Antibody Sero-response to Each DEN Type (Increase Neut.) Antibody From pre-to Post-vaccination, to be Determined by a Qualified Assay) After Each Dose of Study Vaccines

    Seropositivity rates for neut. antibodies according to pre-vaccination flavivirus immune status-primed/unprimed subjects.

    PRE = Pre-vaccination PI(M1) = Post Dose 1, Month 1 PII(M7) = Post Dose 2, Month 7 PII(M9) = Post Dose 2, Month 9

    Measured: 9 months

  9. Incidence of Measurable Dengue Viremia at Specified Time Points After Each Dose

    Percentage of subjects with incidence of measurable dengue viremia at specified time points after each dose.

    Negative = GEQ/uL results is equal to zero Undetermined = GEQ/uL result is below LOD Positive = GEQ/uL result is >=LOD Missing = No data PI(M1) = Post Dose 1, Month 1 PII(D2,5,8,12) = Post Dose 2, Days 2, 5,8 and 12 PII(D5,8,12,14) = Post Dose 2, Days 5, 8, 12 and 14 PII(M7) = Post Dose 2, Month 7

    Measured: within 7 months

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted1 Sep 2006 (estimated)
  2. Study startApr 2007
  3. Primary completionFeb 2008
  4. Study completionFeb 2008

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 2
Primary purpose
Prevention
Allocation
Randomised
Intervention model
Parallel groups
Masking
Double blind
Who is masked
Participant, Investigator
Enrolment
120 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT00370682
Sponsor's protocol ID
WRAIR 1281
Other IDs
Study no: 103854 (T-DEN-002), HSRRB A-13699
Status last verified
May 2017
First submitted
30 Aug 2006
Last updated
30 May 2017
Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
Individual data sharing
Yes: GSK

Publications

  • Watanaveeradej V, Gibbons RV, Simasathien S, Nisalak A, Jarman RG, Kerdpanich A, Tournay E, De La Barrerra R, Dessy F, Toussaint JF, Eckels KH, Thomas SJ, Innis BL. Safety and immunogenicity of a rederived, live-attenuated dengue virus vaccine in healthy adults living in Thailand: a randomized trial. Am J Trop Med Hyg. 2014 Jul;91(1):119-28. doi: 10.4269/ajtmh.13-0452. Epub 2014 May 27.

    PubMed 24865677

Questions about this trial

What is this clinical trial studying?

A Phase 2 study testing T-DEN F17 and T-DEN F-19 in people with Dengue, run by U.S. Army Medical Research and Development Command at 1 site in Thailand.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 6 inclusion and 17 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 30 May 2017. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in Thailand. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

Yes. Results are posted in the registry (first posted 30 May 2017). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Incidence of Any Grade 3 Solicited Adverse Events (AEs) Within 21 Days Follow-up After Dose 1 (time frame: 0-21 days after dose 1). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT00370682, which also lists 1 linked publication.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 30 May 2017.

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