A West Nile Virus DNA Vaccine Utilizing a Modified Promoter Induces Neutralizing Antibody in Younger and Older Healthy Adults in a Phase I Clinical Trial
Autor: | Sarah A. Hubka, Mary E. Enama, Theodore C. Pierson, Steve Rucker, Nikkida Bundrant, Martha Nason, Richard A. Koup, Wenjuan Gu, John R. Mascola, Ingelise J. Gordon, Steevenson Nelson, Barney S. Graham, Niraj Desai, Robert T. Bailer, Julie E. Ledgerwood, Gary J. Nabel |
---|---|
Rok vydání: | 2011 |
Předmět: |
Adult
Male animal diseases viruses T-Lymphocytes Biology Antibodies Viral complex mixtures Virus DNA vaccination Young Adult Major Articles and Brief Reports Age Distribution Vaccines DNA medicine Humans Immunology and Allergy Neutralizing antibody Aged Viral Vaccine Immunogenicity ELISPOT virus diseases Viral Vaccines Middle Aged biology.organism_classification medicine.disease Antibodies Neutralizing Virology nervous system diseases Flavivirus Infectious Diseases Immunology biology.protein Female West Nile virus West Nile Fever Encephalitis |
Zdroj: | The Journal of Infectious Diseases. 203:1396-1404 |
ISSN: | 1537-6613 0022-1899 |
Popis: | Background. West Nile virus (WNV) is a flavivirus that causes meningitis and encephalitis. There are no licensed vaccines to prevent WNV in humans. The safety and immunogenicity of a first-generation WNV DNA vaccine was demonstrated in a clinical trial and a similar DNA vaccine has been licensed for use in horses. Methods. A DNA vaccine encoding the protein premembrane and the E glycoproteins of the NY99 strain of WNV under the transcriptional control of the CMV/R promoter was evaluated in an open-label study in 30 healthy adults. Half of the subjects were age 18–50 years and half were age 51–65 years. Immune responses were assessed by enzyme-linked immunosorbent assay, neutralization assays, intracellular cytokine staining, and ELISpot. Results. The 3-dose vaccine regimen was safe and well tolerated. Vaccine-induced T cell and neutralizing antibody responses were detected in the majority of subjects. The antibody responses seen in the older age group were of similar frequency, magnitude, and duration as those seen in the younger cohort. Conclusions. Neutralizing antibody responses to WNV were elicited by DNA vaccination in humans, including in older individuals, where responses to traditional vaccine approaches are often diminished. This DNA vaccine elicited T cell responses of greater magnitude when compared with an earlier-generation construct utilizing a CMV promoter. Clinical Trials Registration. {"type":"clinical-trial","attrs":{"text":"NCT00300417","term_id":"NCT00300417"}}NCT00300417. |
Databáze: | OpenAIRE |
Externí odkaz: |