Published in

American Society for Microbiology, Infection and Immunity, 11(78), p. 4601-4612, 2010

DOI: 10.1128/iai.00315-10

Links

Tools

Export citation

Search in Google Scholar

New Candidate Vaccines against Blood-Stage Plasmodium falciparum Malaria: Prime-Boost Immunization Regimens Incorporating Human and Simian Adenoviral Vectors and Poxviral Vectors Expressing an Optimized Antigen Based on Merozoite Surface Protein 1

Journal article published in 2010 by Anna L. Goodman, C. Epp, D. Moss, A. A. Holder ORCID, J. M. Wilson, G. P. Gao, C. A. Long, E. J. Remarque, A. W. Thomas, V. Ammendola, S. Colloca, M. D. J. Dicks, S. Biswas, D. Seibel, L. M. van Duivenvoorde and other authors.
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

Full text: Download

Green circle
Preprint: archiving allowed
Upload
Green circle
Postprint: archiving allowed
Upload
Orange circle
Published version: archiving restricted
Upload
Policy details
Data provided by SHERPA/RoMEO

Abstract

ABSTRACT Although merozoite surface protein 1 (MSP-1) is a leading candidate vaccine antigen for blood-stage malaria, its efficacy in clinical trials has been limited in part by antigenic polymorphism and potentially by the inability of protein-in-adjuvant vaccines to induce strong cellular immunity. Here we report the design of novel vectored Plasmodium falciparum vaccines capable of overcoming such limitations. We optimized an antigenic insert comprising the four conserved blocks of MSP-1 fused to tandemly arranged sequences that represent both allelic forms of the dimorphic 42-kDa C-terminal region. Inserts were expressed by adenoviral and poxviral vectors and employed in heterologous prime-boost regimens. Simian adenoviral vectors were used in an effort to circumvent preexisting immunity to human adenoviruses. In preclinical studies these vaccines induced potent cellular immune responses and high-titer antibodies directed against MSP-1. The antibodies induced were found to have growth-inhibitory activity against dimorphic allelic families of P. falciparum . These vectored vaccines should allow assessment in humans of the safety and efficacy of inducing strong cellular as well as cross-strain humoral immunity to P. falciparum MSP-1.