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Pediatr Infect Dis J. 2013 Oct;32(10):1102-9. doi: 10.1097/INF.0b013e31829b8022.

Safety and immunogenicity of a recombinant tetravalent dengue vaccine in 9-16 year olds: a randomized, controlled, phase II trial in Latin America.

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1
From the *Centro de Investigaciones Epidemiológicas, Universidad Industrial de Santander, Bucaramanga, Colombia; †Organización para el Desarrollo y la Investigación Salud en Honduras, Tegucigalpa, Honduras; ‡Instituto Nacional de Pediatría, Unidad de Apoyo a la Investigación Clínica, Mexico City, Mexico; §Sanofi Pasteur, Swiftwater, PA; ¶Sanofi Pasteur, Montevideo, Uruguay; ‖Sanofi Pasteur, Bogota, Colombia; and **Sanofi Pasteur, Mexico City, Mexico.

Abstract

BACKGROUND:

The dengue virus is a member of the Flavivirus (FV) genus, which also includes the yellow fever virus. Dengue disease is caused by any 1 of 4 dengue virus serotypes and is a serious public health concern in Latin America. This study evaluated the safety and immunogenicity of a candidate recombinant, live-attenuated, tetravalent dengue vaccine (CYD-TDV) in 9-16 year olds in Latin America.

METHODS:

In this randomized, blinded, controlled study, volunteers received either 3 doses of CYD-TDV (n = 401) or placebo as first and second injection and tetanus/diphtheria/acellular pertussis vaccine as third injection (n = 199) at 0, 6 and 12 months. Adverse events were documented. Plaque reduction neutralization test antibody titers against the 4 CYD-TDV parental strains were measured before and 28 days after each dose. Seropositivity was defined as antibody titers ≥10 1/dil.

RESULTS:

The number of adverse reactions decreased after each successive CYD-TDV dose. After each CYD-TDV dose, antibody titers against all 4 serotypes were higher than baseline and respective predose titers. After the third dose of CYD-TDV, 100%, 98.6% and 93.4% of participants were seropositive for at least 2, at least 3 or all 4 serotypes, respectively. Higher antibody titers were observed in participants in the CYD-TDV group who were FV-seropositive at baseline compared with those who were FV-seronegative.

CONCLUSIONS:

CYD-TDV had a favorable safety profile and elicited antibody responses against all 4 dengue virus serotypes in 9-16 year olds in Latin America. These findings support the continued development of CYD-TDV.

TRIAL REGISTRATION:

ClinicalTrials.gov NCT00993447.

PMID:
24067553
DOI:
10.1097/INF.0b013e31829b8022
[Indexed for MEDLINE]
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