Clinical trial NCT00551915: A Study of the Safety and Tolerability of V419 in Healthy Infants at 2,4, 6 and 12 to 14 Months of Age (V419-003)
Official title: Safety, Tolerability, and Immunogenicity of 3 Different Formulations of a Liquid Hexavalent Combination Vaccine, HR5I When Administered to Healthy Hepatitis B Vaccine-Naive Infants at 2, 4, 6, and 12-14 Months of Age
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: PHASE2
Conditions: Bacterial Infections; Virus Diseases
Lead sponsor: Merck Sharp & Dohme LLC
Sponsor class: INDUSTRY
First posted: 2007-10-31
Enrollment: 756
Sex: ALL
Minimum age (years): 6
Maximum age (years): 9
Standard ages: CHILD
Accepts healthy volunteers: yes
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: PREVENTION

Brief summary: The purpose of this study is to evaluate the safety, tolerability and immunogenicity of 3 formulations of the HR5I vaccine (Haemophilus influenzae type b conjugate, recombinant hepatitis B surface antigen, diphtheria, tetanus, 5-component acellular pertussis, and inactivated poliovirus Types 1, 2, and 3). The primary hypothesis is that at least 1 of the 3 formulations of HR5I administered as a primary series at 2, 4, and 6 months of age will be acceptable (similar to targeted rates) with respect to Postdose 3 antibody responses to all antigens.

Detailed description: Participants will be randomized into 4 arms:

AR51 (12, 10): arm receiving vaccine formulation containing 12 mcg of polyribosylribitol phosphate (PRP) conjugated to tetanus toxoid (PRP-T) and 10 mcg of Hepatitis B surface antigen (HBsAg)

PR51 (3, 10): arm receiving vaccine formulation containing 3 mcg of polyribosylribitol phosphate conjugated to the outer membrane protein complex of Neisseria meningitides (PRP-OMPC) and 10 mcg of HBsAg

PR51 (6, 10): arm receiving vaccine formulation containing 6 mcg of PRP-OMPC and 10 mcg of HBsAg

PENTACEL™ + RECOMBIVAX HB™: open-label control group receiving PENTACEL™ (licensed vaccine for diphtheria, tetanus, pertussis, poliomyelitis, and invasive disease due to Haemophilus influenzae type b) and RECOMBIVAX HB™ (licensed vaccine for hepatitis)

Eligibility criteria: Inclusion Criteria:

* Healthy infants 2 months of age who have not received prior vaccinations for Haemophilus influenzae type b (Hib), hepatitis B, Diptheria/Pertussis/Tetanus (DPT), or Polio

Exclusion Criteria:

* HIV infection in participant (child/mother)
* Documented HBsAg seropositivity in the participant (child or mother)
* History of invasive Hib disease, hepatitis B, diphtheria, tetanus, pertussis, or poliovirus infection
* History of seizure disorder
* Underlying medical conditions such as inborn errors of metabolism, failure to thrive, or any major congenital abnormalities requiring surgery
* Prior or anticipated receipt of immune globulin, blood, or blood products
* Known hypersensitivity to any component of the investigational or marketed vaccines being administered in this protocol
* Any history or condition that would exclude the participant from receiving any vaccine administered under this protocol based on the contraindications that appear in the package circulars for each component of these vaccines
* Any condition that, in the opinion of the investigator, is not stable or may interfere with the evaluation of the study objectives

Primary outcomes:
measure: Percentage of participants with level of anti-PRP antibodies >1.0 μg/mL at the Postdose 3 time point
timeFrame: At 7 months of age (1 month after 3rd vaccination)
measure: Percentage of participants with level of anti-HBsAg antibodies ≥10 mIU/L at the Postdose 3 time point
timeFrame: At 7 months of age (1 month after 3rd vaccination)
measure: Percentage of participants with a ≥4-fold rise in levels of antibodies to pertussis antigens at the Postdose 3 time point
timeFrame: At 7 months of age (1 month after 3rd vaccination)
measure: Percentage of participants with level of anti-diphtheria antibodies ≥0.01 IU/mL at the Postdose 3 time point
timeFrame: At 7 months of age (1 month after 3rd vaccination)
measure: Percentage of participants with level of anti-tetanus antibodies ≥0.01 IU/mL at the Postdose 3 time point
timeFrame: At 7 months of age (1 month after 3rd vaccination)
measure: Percentage of participants with neutralizing anti-poliovirus type antibodies at ≥1:8 dilution at the Postdose 3 time point
timeFrame: At 7 months of age (1 month after 3rd vaccination)
Secondary outcomes:
measure: Percentage of participants with level of anti-PRP antibodies >1.0 μg/mL at the Postdose 2 time point
timeFrame: At 6 months of age (2 months after 2nd vaccination)
measure: Percentage of participants with level of anti-HBsAg antibodies ≥10 mIU/L at the Postdose 2 time point
timeFrame: At 6 months of age (2 months after 2nd vaccination)
measure: Percentage of participants with a ≥4-fold rise in level of antibodies to pertussis antigens at the Postdose 2 time point
timeFrame: At 6 months of age (2 months after 2nd vaccination)
measure: Percentage of participants with level of anti-diphtheria antibodies ≥0.01 IU/mL at the Postdose 2 time point
timeFrame: At 6 months of age (2 months after 2nd vaccination)
measure: Percentage of participants with level of anti-tetanus antibodies ≥0.01 IU/mL at the Postdose 2 time point
timeFrame: At 6 months of age (2 months after 2nd vaccination)
measure: Percentage of participants with neutralizing anti-poliovirus type antibodies at ≥1:8 dilution at the Postdose 2 time point
timeFrame: At 6 months of age (2 months after 2nd vaccination)
measure: Number of participants with at least 1 adverse event (AE)
timeFrame: From 1st vaccination up to 14 days following last vaccination (up to 14.5 months)
measure: Number of participants who discontinued study treatment due to an AE
timeFrame: From 1st vaccination up to 14 days following last vaccination (up to 14.5 months)
Other outcomes:
Locations:
Study officials:
affiliation: Merck Sharp & Dohme LLC
name: Medical Monitor
role: STUDY_DIRECTOR
References:
citation: Diaz-Mitoma F, Halperin SA, Tapiero B, Hoffenbach A, Zappacosta PS, Radley D, Bradshaw S, Martin JC, Boslego JW, Hesley TM, Bhuyan PK, Silber JL. Safety and immunogenicity of three different formulations of a liquid hexavalent diphtheria-tetanus-acellular pertussis-inactivated poliovirus-Haemophilus influenzae b conjugate-hepatitis B vaccine at 2, 4, 6 and 12-14 months of age. Vaccine. 2011 Feb 1;29(6):1324-31. doi: 10.1016/j.vaccine.2010.11.053. Epub 2010 Dec 4.