Abstract
The highly attenuated poxvirus strain modified vaccinia virus Ankara (MVA) has reached maturity as antigen delivery system and as a vaccine candidate against a broad spectrum of infectious diseases. This has been largely recognized from research on virus–host cell interactions, gene expression profiling, virus distribution and immunological studies in preclinical and clinical trials. This review includes our main contributions from the basic knowledge of the biology of the MVA vector, both in vitro and in vivo, in comparison with the attenuated NYVAC strain, to its evaluation as a vaccine candidate against HIV/AIDS in clinical trials. We will detail the generation and characterization of the recombinant poxvirus vector MVA expressing the HIV-1 Env, Gag, Pol and Nef antigens from clade B (referred as MVA-B) and review the preclinical data that supported the evaluation of MVA-B as the first in human HIV-1 prophylactic and therapeutic vaccine in Spain. In addition, we will assess the results of clinical trials and discuss the research projects we are currently working on considering the latest scientific advances in the HIV vaccine field.
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