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In previously immunized elderly adults inactivated influenza A (H1N1) virus vaccines induce poor antibody responses that are not enhanced by liposome adjuvant.
Vaccine 1995; 13(14):1330-5V

Abstract

In a randomized, double-blinded study, 77 healthy elderly seropositive volunteers (95% of whom had received influenza vaccine within the prior 5 years) were immunized with either monovalent liposome-adjuvanted or control subvirion vaccine containing inactivated influenza A/Taiwan/1/86 (H1N1) virus. The experimental vaccine was well-tolerated but elicited serologic responses that were no different in frequency or magnitude from those induced by the control vaccine. Less than 20% of subjects in either group mounted a fourfold or greater rise in antibody titer. Sixty-three elderly subjects who had participated in the liposome vaccine trial were reimmunized 18 weeks later with licensed trivalent subvirion vaccine, and their serologic responses were compared with those of 26 young adults. Significant rises in hemagglutination inhibition (HAI) antibody titers to the A/Texas/36/91 (H1N1), A/Beijing/32/92 (H3N2) and B/Panama/45/90 components occurred in 10%, 76% and 56% of elderly vaccinees, respectively, compared to 92% (p < 0.0001), 100% (p < 0.005) and 88% (p < 0.005) of young vaccines, respectively. Age differences in seroresponse rates to the H1N1 subtype antigen were significant even when comparing young and old adults with identical prevaccination HAI antibody titers. These data confirm prior observations suggesting that previously immunized elderly persons have impaired serologic responses to influenza vaccines, particularly against recently circulating H1N1 subtype antigens. It remains unclear whether liposome-adjuvanted formulations would have an advantage over conventional influenza vaccines for routine annual reimmunization of targeted populations.

Authors+Show Affiliations

VA Medical Center, Jefferson Barracks Division, St. Louis, MO 63125-4199, USA.No affiliation info availableNo affiliation info available

Pub Type(s)

Clinical Trial
Comparative Study
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

8585289

Citation

Powers, D C., et al. "In Previously Immunized Elderly Adults Inactivated Influenza a (H1N1) Virus Vaccines Induce Poor Antibody Responses That Are Not Enhanced By Liposome Adjuvant." Vaccine, vol. 13, no. 14, 1995, pp. 1330-5.
Powers DC, Hanscome PJ, Pietrobon PJ. In previously immunized elderly adults inactivated influenza A (H1N1) virus vaccines induce poor antibody responses that are not enhanced by liposome adjuvant. Vaccine. 1995;13(14):1330-5.
Powers, D. C., Hanscome, P. J., & Pietrobon, P. J. (1995). In previously immunized elderly adults inactivated influenza A (H1N1) virus vaccines induce poor antibody responses that are not enhanced by liposome adjuvant. Vaccine, 13(14), pp. 1330-5.
Powers DC, Hanscome PJ, Pietrobon PJ. In Previously Immunized Elderly Adults Inactivated Influenza a (H1N1) Virus Vaccines Induce Poor Antibody Responses That Are Not Enhanced By Liposome Adjuvant. Vaccine. 1995;13(14):1330-5. PubMed PMID: 8585289.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - In previously immunized elderly adults inactivated influenza A (H1N1) virus vaccines induce poor antibody responses that are not enhanced by liposome adjuvant. AU - Powers,D C, AU - Hanscome,P J, AU - Pietrobon,P J, PY - 1995/10/1/pubmed PY - 1995/10/1/medline PY - 1995/10/1/entrez SP - 1330 EP - 5 JF - Vaccine JO - Vaccine VL - 13 IS - 14 N2 - In a randomized, double-blinded study, 77 healthy elderly seropositive volunteers (95% of whom had received influenza vaccine within the prior 5 years) were immunized with either monovalent liposome-adjuvanted or control subvirion vaccine containing inactivated influenza A/Taiwan/1/86 (H1N1) virus. The experimental vaccine was well-tolerated but elicited serologic responses that were no different in frequency or magnitude from those induced by the control vaccine. Less than 20% of subjects in either group mounted a fourfold or greater rise in antibody titer. Sixty-three elderly subjects who had participated in the liposome vaccine trial were reimmunized 18 weeks later with licensed trivalent subvirion vaccine, and their serologic responses were compared with those of 26 young adults. Significant rises in hemagglutination inhibition (HAI) antibody titers to the A/Texas/36/91 (H1N1), A/Beijing/32/92 (H3N2) and B/Panama/45/90 components occurred in 10%, 76% and 56% of elderly vaccinees, respectively, compared to 92% (p < 0.0001), 100% (p < 0.005) and 88% (p < 0.005) of young vaccines, respectively. Age differences in seroresponse rates to the H1N1 subtype antigen were significant even when comparing young and old adults with identical prevaccination HAI antibody titers. These data confirm prior observations suggesting that previously immunized elderly persons have impaired serologic responses to influenza vaccines, particularly against recently circulating H1N1 subtype antigens. It remains unclear whether liposome-adjuvanted formulations would have an advantage over conventional influenza vaccines for routine annual reimmunization of targeted populations. SN - 0264-410X UR - https://www.unboundmedicine.com/medline/citation/8585289/In_previously_immunized_elderly_adults_inactivated_influenza_A__H1N1__virus_vaccines_induce_poor_antibody_responses_that_are_not_enhanced_by_liposome_adjuvant_ L2 - https://linkinghub.elsevier.com/retrieve/pii/0264410X9500002I DB - PRIME DP - Unbound Medicine ER -