Immune Response to Different Schedules of a Tetravalent Dengue Vaccine Given With or Without Yellow Fever Vaccine

Study Overview
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Brief Summary
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The aim of this study was to evaluate the administration of CYD dengue vaccine serotypes (1, 2, 3 and 4) following a compressed schedule in 3 different populations. Primary Objectives: To describe the humoral immune response to each of the 4 parental dengue virus serotypes at baseline and 28 days after CYD dengue vaccine Dose 3 in Group 1 (Month [M] 13) and Group 2 (M07), irrespective of whether or not Yellow Fever (YF) vaccine has been previously administered. To describe the persistence of the humoral immune response to each of the 4 parental dengue virus serotypes 6 months after CYD dengue vaccine Dose 3 in Group 1 (M18) and Group 2 (M12), irrespective of whether or not YF vaccine has been previously administered. Secondary Objective: To describe the humoral immune response to each of the 4 parental dengue virus serotypes at baseline and 28 days after CYD dengue vaccine Dose 1 and Dose 2 in Groups 1 and 2, irrespective of whether or not YF vaccine has been previously administered. To describe the humoral immune response to each of the 4 parental dengue virus serotypes at baseline and 28 days after CYD dengue Dose 1 in the combined YF-participants in Group 1 (N=60) and Group 2 (N=60), and in Group 3 (N=120). To describe by FV status at baseline the humoral immune response to each of the 4 parental dengue virus serotypes at baseline and 28 days after each injection of CYD dengue vaccine in Groups 1, 2, and 3. To describe the safety profile after each injection of CYD dengue vaccine and/or YF vaccine.

Detailed Description
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Participants were randomized to 4 different groups to receive either CYD dengue vaccine and/or YF vaccine. Participants who already received YF vaccine prior to enrolment were randomized to one of the 2 groups receiving CYD dengue vaccine alone. Participants were evaluated for immunogenicity, antibody persistence, reactogenicity and safety.

Official Title
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Evaluation of the Immune Response to Different Schedules of a Tetravalent Dengue Vaccine Administered With or Without Yellow Fever Vaccine in US Adults.

Conditions
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Dengue, Dengue Fever, Dengue Hemorrhagic Fever, Yellow Fever

Intervention / Treatment
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* Biological: Live, attenuated, recombinant dengue serotypes 1, 2, 3, and 4 virus
* Biological: Live, attenuated, recombinant dengue serotypes 1, 2, 3, and 4 virus
* Biological: Live, attenuated, recombinant dengue serotypes 1, 2, 3, and 4 virus
* Biological: Yellow Fever


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Aged >= 18 to <= 45 years on the day of inclusion Informed consent form had been signed and dated Able to attend all scheduled visits and complied with all trial procedures For participants classified as YF positive (+) to be included in Groups 1 and 2, previous vaccination (3 months to 10 years) with YF vaccine confirmed by acceptable documentation. Exclusion Criteria: Participant was pregnant, or lactating, or of childbearing potential (to be considered of non-childbearing potential, a female must be post-menopausal for at least 1 year, surgically sterile, or using an effective method of contraception or abstinence from at least 4 weeks prior to the first vaccination and until at least 4 weeks after the last vaccination) Participation in the 4 weeks preceding the first trial vaccination, or planned participation during the present trial period, in another clinical trial investigating a vaccine, drug, medical device, or medical procedure Receipt of any vaccine in the 4 weeks preceding the first trial vaccination or planned receipt of any vaccine in the 4 weeks following each trial vaccination For all participants classified as YF negative (-), any previous vaccination against Flavivirus (FV) diseases (including Japanese Encephalitis [JE], tick-borne encephalitis, and YF) For participants classified as YF+, previous vaccination against FV diseases except YF (including JE and tick-borne encephalitis) For all participants, any FV vaccination planned during the trial period outside the study protocol Receipt of immune globulins, blood or blood-derived products in the past 3 months Known or suspected congenital or acquired immunodeficiency; or receipt of immunosuppressive therapy such as anti-cancer chemotherapy or radiation therapy within the preceding 6 months; or long-term systemic corticosteroid therapy (prednisone or equivalent for more than 2 consecutive weeks within the past 3 months) Self-reported seropositivity for human immunodeficiency virus (HIV), hepatitis B, or hepatitis C Self-reported history of FV infection (e.g., JE, Dengue, YF, West Nile), confirmed either clinically or serologically Known systemic hypersensitivity to any of the vaccine components, or history of a life-threatening reaction to the vaccine(s) used in the trial or to a vaccine containing any of the same substances, including dry natural latex Deprived of freedom by an administrative or court order, or in an emergency setting, or hospitalized involuntarily Current alcohol abuse or drug addiction Chronic illness that, in the opinion of the investigator, is at a stage where it might interfere with trial conduct or completion Identified as an employee of the Investigator or study center, with direct involvement in the proposed study or other studies under the direction of that Investigator or study center, as well as family members (i.e., immediate, husband, wife and their children, adopted or natural) of the employee or the Investigator Moderate or severe acute illness/infection (according to investigator judgment) on the day of vaccination or febrile illness (temperature >= 38.0°C [>=100.4°F]). A prospective participant should not be included in the study until the condition has resolved or the febrile event has subsided Previous residence (> 12 months) in, or travel in the last 30 days to FV endemic regions History of thymic pathology (thymoma), thymectomy, or myasthenia.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 45 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Prevention
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: CYD Dengue vaccine: Group 1<br>Participants received 3 doses of CYD dengue vaccine; one each at 0, 6 and 12 months. | Biological: Live, attenuated, recombinant dengue serotypes 1, 2, 3, and 4 virus<br>* 0.5 mL, Subcutaneous<br>* Other names: CYD Dengue Vaccine;|
| Experimental: CYD Dengue vaccine: Group 2<br>Participants received 3 doses of CYD dengue vaccine; one each at 0, 2 and 6 months. | Biological: Live, attenuated, recombinant dengue serotypes 1, 2, 3, and 4 virus<br>* 0.5 mL, Subcutaneous<br>* Other names: CYD Dengue Vaccine;|
| Experimental: CYD Dengue and Yellow Fever vaccine: Group 3<br>Participants received 3 doses of CYD dengue vaccine; one each at 0, 2 and 6 months, and single dose of YF vaccine at Day 0. | Biological: Live, attenuated, recombinant dengue serotypes 1, 2, 3, and 4 virus<br>* 0.5 mL, Subcutaneous<br>* Other names: CYD Dengue Vaccine;Biological: Yellow Fever<br>* 0.5 mL, Subcutaneous<br>* Other names: YF VAX®;|
| Active Comparator: Yellow Fever vaccine: Group 4<br>Participants received single dose of YF vaccine at Day 0. | Biological: Yellow Fever<br>* 0.5 mL, Subcutaneous<br>* Other names: YF VAX®;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Geometric Mean Titers (GMTs) of Antibodies Against Each Dengue Virus Serotype Following Injection (Inj.) With CYD Dengue Vaccine Dose 3: Group 1 and Group 2 | GMTs of antibodies against each dengue virus serotype (parental strain) was assessed using the dengue plaque reduction neutralization test (PRNT). | Pre-injection 1, 28 days and 6 months post-injection 3 | 
| Percentage of Participants With Seropositivity Against Each Dengue Virus Serotype Following Injection With CYD Dengue Vaccine Dose 3: Group 1 and Group 2 | Seropositivity against each dengue virus serotypes (parental strains) was assessed using the dengue PRNT. Seropositive participants were defined as the participants with neutralizing antibody titer >=10 (1/dilution). | Pre-injection 1, 28 days and 6 months post-injection 3 | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Geometric Mean Titers of Antibodies Against Each Dengue Virus Serotype Following Injection With CYD Dengue Vaccine Dose 1 and Dose 2: Group 1 and Group 2 | GMTs of antibodies against each dengue virus serotype (parental strain) was assessed using the dengue PRNT. | Pre-injection 1 and 2 and 28 days post-injection 1 and 2 | 
| Percentage of Participants With Seropositivity Against Each Dengue Virus Serotype Following Injection With CYD Dengue Vaccine Dose 1 and Dose 2: Group 1 and Group 2 | Seropositivity against each dengue virus serotypes (parental strains) was assessed using the dengue PRNT. Seropositive participants were defined as the participants with neutralizing antibody titer >=10 (1/dilution). | Pre-injection 1 and 2 and 28 days post-injection 1 and 2 | 
| Geometric Mean Titers of Antibodies Against Each Dengue Virus Serotype Following Injection With CYD Dengue Vaccine Dose 1 In YF Non-Immune Participants: Group 1 and Group 2 (Pooled) and Group 3 | GMTs of antibodies against each dengue virus serotype (parental strain) was assessed using the dengue plaque reduction neutralization test-50 (PRNT50). Groups 1 and 2 data was reported as pooled data. YF-non immune participants were defined as participants with YF baseline titer PRNT80 < 10 (1/dilution). | Pre-injection 1 and 28 days post-injection 1 | 
| Percentage of YF Non-Immune Participants With Seropositivity Against Each Dengue Virus Serotype Following Injection With CYD Dengue Vaccine Dose 1: Group 1 and Group 2 (Pooled) and Group 3 | Seropositivity against each dengue virus serotypes (parental strains) was assessed using the dengue PRNT. Seropositive participants were defined as the participants with neutralizing antibody titer >=10 (1/dilution). Groups 1 and 2 data was reported as pooled data. YF-non immune participants were defined as participants with YF baseline titer dengue plaque reduction neutralization test-80 (PRNT80) <10 (1/dilution). | Pre-injection 1 and 28 days post-injection 1 | 
| Geometric Mean Titers of Antibodies Against Each Dengue Virus Serotype Following Each Injection With CYD Dengue Vaccine: Group 1, Group 2 and Group 3 (FV Immune Participants) | GMTs of antibodies against each dengue virus serotype (parental strain) was assessed using the dengue PRNT. FV immune participants were defined as participants with titer >= 10 (1/dilution) for at least 1 serotype with parental dengue virus strain (sera tested by PRNT) or with titer >= 10 (1/dilution) for YF virus (sera with PRNT80 result). | Pre Injection 1, 2 and 3 and 28 days post injection 1, 2 and 3 | 
| Geometric Mean Titers of Antibodies Against Each Dengue Virus Serotype Following Each Injection With CYD Dengue Vaccine: Group 1, Group 2 and Group 3 (FV Non-Immune Participants) | GMTs of antibodies against each dengue virus serotype (parental strain) was assessed using the dengue PRNT. FV non-immune participants were defined as participants with titer < 10 (1/dilution) for all serotypes with parental dengue virus strains (sera tested by PRNT) and with titer <10 (1/dilution) for YF virus (using sera with PRNT80 result). | Pre-injection 1, 2, 3 and 28 days post-injection 1, 2 and 3 | 
| Percentage of Participants With Seropositivity Against Each Dengue Virus Serotype Following Each Injection With CYD Dengue Vaccine: Group 1, Group 2 and Group 3 (FV Immune Participants) | Seropositivity against each dengue virus serotypes (parental strains) was assessed using the dengue PRNT. Seropositive participants were defined as the participants with neutralizing antibody titer >=10 (1/dilution). FV immune participants at baseline were defined as participants with titer >= 10 (1/dilution) for at least 1 serotype with parental dengue virus strain (sera tested by PRNT) or with titer >=10 (1/dilution) for YF virus (sera with PRNT80 result). | Pre-injection 1, 2, 3 and 28 days post-injection 1, 2 and 3 | 
| Percentage of Participants With Seropositivity Against Each Dengue Virus Serotype Following Each Injection With CYD Dengue Vaccine: Group 1, Group 2 and Group 3 (FV Non-Immune Participants) | Seropositivity against each dengue virus serotypes (parental strains) was assessed using the dengue PRNT. Seropositive participants were defined as the participants with neutralizing antibody titer >=10 (1/dilution). FV non-immune participants were defined as participants with titer < 10 (1/dilution) for all serotypes with parental dengue virus strains (sera tested by PRNT) and with titer <10 (1/dilution) for YF virus (using sera with PRNT80 result). | Pre injection 1, 2, 3 and 28 days post injection 1, 2 and 3 | 
| Number of Participants Reporting Solicited Injection Site Reactions (Pain, Erythema, Swelling) Following Any Vaccination With CYD Dengue Vaccine (Administered With or Without Yellow Fever Vaccine) or Yellow Fever Vaccine | Solicited injection site reactions: Pain, Erythema, and Swelling. Grade 3 reactions: Pain: significant; prevents daily activity; Erythema and Swelling: >100 mm. | Within 7 days after any injection | 
| Number of Participants Reporting Solicited Systemic Reactions (Fever, Headache, Malaise, Myalgia, Asthenia) Following Any Vaccination With CYD Dengue Vaccine (Administered With or Without Yellow Fever Vaccine) or Yellow Fever Vaccine | Solicited systemic reactions: Fever, Headache, Malaise, Myalgia, and Asthenia. Grade 3 reactions: Fever: >= 39.0°C; Headache, Malaise, Myalgia, and Asthenia: significant; prevents daily activity. | Within 14 days after any injection | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Dengue fever, Dengue Hemorrhagic Fever, CYD dengue vaccine, Yellow Fever, Flavivirus