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Completed

NCT Number: NCT03342898

Immunogenicity and Safety of Tetravalent Dengue Vaccine (TDV) Administered With a Yellow Fever Vaccine in Adults

The main purpose of this study is to assess the immunogenicity and safety of the concomitant and sequential administration of yellow fever (YF) vaccine and tetravalent dengue vaccine (TDV) in healthy participants aged 18 to 60 years living in country non-endemic for both dengue and YF.

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Key information

Conditions

Dengue Arbovirus Infections Flaviviridae Infections Flavivirus Infections Hemorrhagic Fevers, Viral Infections Mosquito-Borne Diseases RNA Virus Infections Vector Borne Diseases Virus Diseases

Age range

18 year–60 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 3

Primary location

Coastal Clinical Research Inc, Mobile, Alabama, United States

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About this study

The vaccine tested in this study is TDV also known as TAK-003 (DENVax). TDV with concomitant and sequential administration of yellow fever (YF-17D) vaccine will be tested to assess immunogenicity and safety in healthy adult participants in non-endemic area(s) for both dengue and YF.

The study will enroll 900 healthy participants. Participants will be randomized to 3 groups in 1:1:1 ratio and will be administered concomitantly and sequentially. The 3 groups are:

  • Group 1: YF-17D vaccine + placebo concomitantly administered on Day 1, first dose of TDV administered on Day 90 and second dose of TDV administered on Day 180.
  • Group 2: first dose of TDV + placebo concomitantly administered on Day 1, second dose of TDV administered on Day 90 and YF-17D vaccine administered on Day 180.
  • Group 3: first dose of TDV + YF-17D vaccine concomitantly administered on Day 1, second dose of TDV administered on Day 90 and placebo administered on Day 180.

This multi-center trial will be conducted in the United States. The overall time to participate in this study is 360 days. Participants will make multiple visits to the clinic with a 6-month follow up including a final visit at Day 360 for a follow-up assessment.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Is aged 18 to 60 years inclusive, at the time of randomization.
  • Is in good health at the time of entry into the trial as determined by medical history, physical examination (including vital signs), and the clinical judgment of the Investigator.

Exclusion criteria

  • Has an elevated oral temperature ≥ 38°C (100.4°F) within 3 days of the intended date of vaccination.
  • Has contraindications, warnings and/or precautions to vaccination with the YF-17D vaccine as specified within the product information (especially history of thymus dysfunction).
  • Female participant who are pregnant or breastfeeding
  • Has any history of progressive or severe neurologic disorder, seizure disorder or neuro-inflammatory disease (e.g., Guillain-Barre syndrome) or suspected impairment/alteration of immune function.
  • Has body mass index (BMI) greater than or equal to 35 kg/m^2 (=weight in kg/[height in meters^2]).
  • Is intent to travel to dengue or YF endemic countries during the trial period.
  • Has received any other vaccines within 14 days (for inactivated vaccines) or 28 days (for live vaccines) prior to enrollment in this trial or who are planning to receive any non-trial vaccine within 28 days of trial vaccine administration.
  • Has previous and planned vaccination (during the trial conduct), against any flavivirus including dengue, YF, Japanese encephalitis (JE) or tick-borne encephalitis viruses.
  • Has previous participation in any clinical trial of a dengue or other flavivirus (e.g., West Nile [WN] virus) candidate vaccine, except for participants who received placebo in those trials.
  • Has a current or previous infection with a flavivirus such as dengue, Zika, YF, JE, WN fever, or Saint Louis encephalitis viruses and participants with a history of prolonged (≥1 year) habitation in a dengue endemic area.

Treatment and study plan

YF-17D

Biological

YF-17D SC injection.

TDV

Biological

TDV SC injection.

Other names: TAK-003, DENVax

Placebo

Drug

Normal Saline (0.9% NaCl) SC injection.

Primary outcomes

  1. Percentage of Participants Who Are YF and Dengue Virus (DENV)-Naive at Baseline and Are Seroprotected Against YF on Day 30 as Measured by Plaque Reduction Neutralization Test (PRNT)

    Time frame: Day 30

    Seroprotection was defined as reciprocal anti-YF neutralizing antibody titer ≥10. Immunological naivety to YF and DENV was defined as Baseline reciprocal neutralizing antibody titers <10 for YF and for the 4 dengue serotypes. The 95% CI was calculated using exact Clopper-Pearson method.

Secondary outcomes

  1. Geometric Mean Titers (GMTs) of Neutralizing Antibodies for Each of the 4 Dengue Serotypes on Days 30, 90, 120, 180 and 210 in Participants YF and DENV-naive at Baseline

    Time frame: Pre-second and -third vaccination (Days 90 and 180, respectively); and 1 month post -first, second, and third vaccination (Days 30, 120, and 210, respectively)

    GMTs of neutralizing antibodies was measured by microneutralization test 50% [MNT50] for each of the 4 dengue serotypes. The 4 DENV serotypes are DENV-1, DENV-2, DENV-3 and DENV-4.

  2. Percentage of Participants Who Are Seropositive for Each of the 4 Dengue Serotypes on Days 30, 90, 120, 180 and 210 in Participants YF and DENV-naive at Baseline

    Time frame: Pre-second and -third vaccination (Days 90 and 180, respectively); and 1-month post -first, -second, and -third vaccination (Days 30, 120, and 210, respectively)

    Seropositivity rate was defined as the percentage of seropositive participants as derived from the titers of dengue-neutralizing antibodies. Seropositivity was defined as a reciprocal neutralizing titer ≥10. Seropositivity for each dengue serotype were analyzed and was summarized as: DENV-1, DENV-2, DENV-3, and DENV-4.

  3. Percentage of Participants Who Are Seropositive for Multiple (2, 3 or 4) Dengue Serotypes on Days 30, 90, 120, 180 and 210 in Participants YF and DENV-naive at Baseline

    Time frame: Pre-second and -third vaccination (Days 90 and 180, respectively); and 1-month post -first, second, and -third vaccination (Days 30, 120, and 210, respectively)

    Seropositivity rate was defined as the percentage of seropositive participants, as derived from the titers of dengue-neutralizing antibodies. Seropositivity was defined as a reciprocal neutralizing titer ≥10. Seropositivity for multiple dengue serotypes were summarized in the following categories: at least bivalent, at least trivalent and tetravalent.

  4. Percentage of YF and DENV-naive Participants at Baseline Who Are Seroprotected Against YF on Day 210 as Measured by PRNT

    Time frame: 1-month post third vaccination (Day 210)

    Seroprotection was defined as reciprocal anti-YF neutralizing antibody titer ≥10.

  5. Geometric Mean Titers (GMTs) of Anti-YF Neutralizing Antibodies at Day 30 in Participants YF and DENV-Naive at Baseline

    Time frame: 1-month post-first vaccination (Day 30)

    Geometric mean titers of YF neutralizing antibodies was measured by plaque reduction neutralization test.

  6. Geometric Mean Titers (GMTs) of Anti-YF Neutralizing Antibodies at Day 210 in Participants YF and DENV-Naive at Baseline

    Time frame: 1-month post-third vaccination (Day 210)

    Geometric mean titers of YF neutralizing antibodies was measured by plaque reduction neutralization test.

  7. Percentage of Participants With Solicited Local (Injection Site) Adverse Events (AEs) Following Each Vaccination Dose by Severity

    Time frame: Within 7 Days of each Vaccination (day of vaccination + 6 days)

    An AE is defined as any untoward medical occurrence in a clinical investigation participant administered a trial vaccine; it does not necessarily have to have a causal relationship with trial vaccine administration. Solicited local injection site AEs recorded from participant's-diary. Severity grade at injection site for pain: Grade 0 (No Pain), 1 (did not interfere with daily activity), 2 (interference with daily activity with or without treatment) and 3 (prevents daily activity with or without treatment). For erythema: grade 0 (<25 mm), 1 (>25-≤50 mm), 2 (>50-≤100 mm) and 3 (>100 mm). For swelling: grade 0 (<25 mm), 1 (>25-≤50 mm), 2 (>50-≤100 mm) and 3 (>100 mm). Percentages were rounded off for each category. For the first vaccination (Vac.) YF is given in Arm 1 (A1) and TDV is given in Arm 2 (A2). A1 = YF for Group 1, Placebo for Group 2, and YF for Group 3; A2 = Placebo for Group 1, TDV for Group 2, and TDV for Group 3.

  8. Percentage of Participants With Solicited Systemic Adverse Events Following Each Vaccination Dose by Severity

    Time frame: Within 14 Days of each Vaccination (day of vaccination + 13 days)

    Solicited systemic AEs (fever, headache, asthenia, malaise, and myalgia) recorded from participant's-diary. Severity grades for headache are grade 0 (none), 1 (mild: no interference with daily activity), 2 (moderate: interference with daily activity with or without treatment) and 3 (severe: prevents normal activity with or without treatment). Severity grades for asthenia, malaise and myalgia is grade 0 (none), 1 (mild: no interference with daily activity), 2 (moderate: interference with daily activity), 3 (severe: prevents daily activity). Fever is defined as greater than or equal to 38º C or 100.4º C. Fever was excluded from the overall count as no severity grading was applied for it. Percentages were rounded off for each category.

  9. Percentage of Participants With Any Unsolicited Adverse Events (AEs)

    Time frame: Within 28 days (day of vaccination + 27 days) after each vaccination

    An AE is defined as any untoward medical occurrence in a clinical investigation participant administered a trial vaccine; it does not necessarily have to have a causal relationship with trial vaccine administration.

  10. Percentage of Participants With Medically Attended Adverse Events (MAAEs)

    Time frame: From first vaccination (Day 1) through end of study (Day 360)

    MAAEs are defined as AEs leading to an unscheduled visit to or by a healthcare professional including visits to an emergency department, but not fulfilling seriousness criteria.

  11. Percentage of Participants With Serious Adverse Events (SAEs)

    Time frame: From first vaccination (Day 1) through end of study (Day 360)

    An SAE is defined as any untoward medical occurrence that results in death, is life-threatening, requires inpatient hospitalization or prolongation of existing hospitalization, results in persistent or significant disability/incapacity, leads to a congenital anomaly/birth defect in the offspring of a participant, is an important medical event that may require intervention to prevent any of the above mentioned criteria and/or may expose the subject to danger, even though the event is not immediately life threatening or fatal or does not result in hospitalization.

Sponsors and collaborators

Lead sponsor

Takeda

Industry

Registry information

Official study title

A Randomized, Observer-Blind, Placebo-Controlled, Phase 3 Trial to Investigate the Immunogenicity and Safety of a Tetravalent Dengue Vaccine Candidate and a Yellow Fever YF-17D Vaccine Administered Concomitantly and Sequentially in Healthy Subjects Aged 18 to 60 Years in Non-Endemic Country(Ies)

Important dates

Study start
2018
Primary completion
2018
Study completion
2019
First posted
Nov 17, 2017
Registry last updated
Oct 8, 2020

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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