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Dose ranging of adjuvant and antigen in a cell culture H5N1 influenza vaccine: safety and immunogenicity of a phase 1/2 clinical trial.
Vaccine. 2010 Jan 08; 28(3):840-8.V

Abstract

BACKGROUND

Dose-sparing strategies and new production technologies will be necessary to produce adequate supplies of vaccines for pandemic influenza. One approach is to include adjuvant, which can reduce the amount of antigen required for immunization and stimulate cross-reactive responses to drifted variants of novel viruses. Dose-sparing studies of adjuvant, itself a finite resource, have not previously been reported for H5N1 vaccine development.

METHODOLOGY/PRINCIPAL FINDINGS

A total of 753 healthy 18-40-year-old adults were randomized to one of 12 groups (N approximately 60/group) to receive two intramuscular doses, 21 days apart, of 3.75, 7.5 or 15 microg of cell culture grown influenza A/H5N1 hemagglutinin (A/Indonesia/5/2005 (H5N1)/PR-8-IBCDC-RG2), each dose level formulated with 0%, 25%, 50% or 100% of the MF59 dose contained in licensed influenza vaccine. 752 subjects actually received one dose, and 695 a second dose. Serum hemagglutination inhibition and neutralizing antibody levels, were determined before and 21 days after each dose. Safety and reactogenicity were assessed by self-completed diary cards. Nonadjuvanted H5N1 formulations were poorly immunogenic, but antibody responses were significantly enhanced by all doses of MF59 for each antigen level. The 3.75 microg H5N1 containing 50% MF59 satisfied the European criteria for pandemic vaccine licensure. All formulations were well tolerated, although MF59 dose-dependent increases in the frequency of injection site pain were observed. The frequencies of injection site and systemic reactions were lower after receipt of the second dose of vaccine. No vaccine-related SAE was reported.

CONCLUSIONS

Dose-sparing of both antigen and adjuvant is possible without compromising immunogenicity, while improving reactogenicity and is a promising strategy that will expand the availability of vaccines for global control of pandemic influenza.

Authors+Show Affiliations

Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, USA.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Randomized Controlled Trial
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, P.H.S.

Language

eng

PubMed ID

19835829

Citation

Keitel, Wendy, et al. "Dose Ranging of Adjuvant and Antigen in a Cell Culture H5N1 Influenza Vaccine: Safety and Immunogenicity of a Phase 1/2 Clinical Trial." Vaccine, vol. 28, no. 3, 2010, pp. 840-8.
Keitel W, Groth N, Lattanzi M, et al. Dose ranging of adjuvant and antigen in a cell culture H5N1 influenza vaccine: safety and immunogenicity of a phase 1/2 clinical trial. Vaccine. 2010;28(3):840-8.
Keitel, W., Groth, N., Lattanzi, M., Praus, M., Hilbert, A. K., Borkowski, A., & Tsai, T. F. (2010). Dose ranging of adjuvant and antigen in a cell culture H5N1 influenza vaccine: safety and immunogenicity of a phase 1/2 clinical trial. Vaccine, 28(3), 840-8. https://doi.org/10.1016/j.vaccine.2009.10.019
Keitel W, et al. Dose Ranging of Adjuvant and Antigen in a Cell Culture H5N1 Influenza Vaccine: Safety and Immunogenicity of a Phase 1/2 Clinical Trial. Vaccine. 2010 Jan 8;28(3):840-8. PubMed PMID: 19835829.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Dose ranging of adjuvant and antigen in a cell culture H5N1 influenza vaccine: safety and immunogenicity of a phase 1/2 clinical trial. AU - Keitel,Wendy, AU - Groth,Nicola, AU - Lattanzi,Maria, AU - Praus,Michaela, AU - Hilbert,Anne Katrin, AU - Borkowski,Astrid, AU - Tsai,Ted F, Y1 - 2009/10/14/ PY - 2009/09/10/received PY - 2009/10/05/accepted PY - 2009/10/20/entrez PY - 2009/10/20/pubmed PY - 2010/2/4/medline SP - 840 EP - 8 JF - Vaccine JO - Vaccine VL - 28 IS - 3 N2 - BACKGROUND: Dose-sparing strategies and new production technologies will be necessary to produce adequate supplies of vaccines for pandemic influenza. One approach is to include adjuvant, which can reduce the amount of antigen required for immunization and stimulate cross-reactive responses to drifted variants of novel viruses. Dose-sparing studies of adjuvant, itself a finite resource, have not previously been reported for H5N1 vaccine development. METHODOLOGY/PRINCIPAL FINDINGS: A total of 753 healthy 18-40-year-old adults were randomized to one of 12 groups (N approximately 60/group) to receive two intramuscular doses, 21 days apart, of 3.75, 7.5 or 15 microg of cell culture grown influenza A/H5N1 hemagglutinin (A/Indonesia/5/2005 (H5N1)/PR-8-IBCDC-RG2), each dose level formulated with 0%, 25%, 50% or 100% of the MF59 dose contained in licensed influenza vaccine. 752 subjects actually received one dose, and 695 a second dose. Serum hemagglutination inhibition and neutralizing antibody levels, were determined before and 21 days after each dose. Safety and reactogenicity were assessed by self-completed diary cards. Nonadjuvanted H5N1 formulations were poorly immunogenic, but antibody responses were significantly enhanced by all doses of MF59 for each antigen level. The 3.75 microg H5N1 containing 50% MF59 satisfied the European criteria for pandemic vaccine licensure. All formulations were well tolerated, although MF59 dose-dependent increases in the frequency of injection site pain were observed. The frequencies of injection site and systemic reactions were lower after receipt of the second dose of vaccine. No vaccine-related SAE was reported. CONCLUSIONS: Dose-sparing of both antigen and adjuvant is possible without compromising immunogenicity, while improving reactogenicity and is a promising strategy that will expand the availability of vaccines for global control of pandemic influenza. SN - 1873-2518 UR - https://www.unboundmedicine.com/medline/citation/19835829/Dose_ranging_of_adjuvant_and_antigen_in_a_cell_culture_H5N1_influenza_vaccine:_safety_and_immunogenicity_of_a_phase_1/2_clinical_trial_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0264-410X(09)01534-5 DB - PRIME DP - Unbound Medicine ER -