PMID- 11858878 OWN - NLM STAT- MEDLINE DCOM- 20020927 LR - 20190728 IS - 0264-410X (Print) IS - 0264-410X (Linking) VI - 20 IP - 11-12 DP - 2002 Feb 22 TI - Absence of antigenic competition in Aotus monkeys immunized with Plasmodium falciparum DNA vaccines delivered as a mixture. PG - 1675-80 AB - Aotus lemurinus lemurinus monkeys were immunized four times with one of three DNA plasmids expressing important Plasmodium falciparum blood stage vaccine candidate proteins or with a mixture containing all three vaccines. The three vaccines encoded sequences from apical merozoite antigen-1 (AMA-1), erythrocyte binding protein-175 (EBA-175) and merozoite surface protein-1 (MSP-1). Antigen-specific enzyme-linked immunosorbant assays (ELISAs) showed no significant differences in antibody titer induced to the three antigens by a single vaccine compared with the titer induced to that same antigen by the trivalent preparation. Results of immunofluorescent antibody assays against erythrocytes infected with asexual blood stage P. falciparum indicated that each of the three monovalent vaccines induced significant antibody responses to whole parasites. The trivalent vaccine mixture induced, after four immunizations, an antibody titer to whole parasites that was 3--12-fold higher than those induced by any of the single vaccines. The fourth immunization with the trivalent vaccine increased the mean antibody in IFAT by more than five-fold. FAU - Jones, Trevor R AU - Jones TR AD - Malaria Program, Naval Medical Research Center, 503 Robert Grant Avenue, Silver Spring, MD 20910, USA. jonest@mmrc.navy.mil FAU - Gramzinski, Robert A AU - Gramzinski RA FAU - Aguiar, Joao C AU - Aguiar JC FAU - Sim, B Kim Lee AU - Sim BK FAU - Narum, David L AU - Narum DL FAU - Fuhrmann, Steven R AU - Fuhrmann SR FAU - Kumar, Sanjai AU - Kumar S FAU - Obaldia, Nicanor AU - Obaldia N FAU - Hoffman, Stephen L AU - Hoffman SL LA - eng PT - Journal Article PT - Research Support, U.S. Gov't, Non-P.H.S. PL - Netherlands TA - Vaccine JT - Vaccine JID - 8406899 RN - 0 (Antibodies, Protozoan) RN - 0 (Antigens, Protozoan) RN - 0 (Carrier Proteins) RN - 0 (Malaria Vaccines) RN - 0 (Membrane Proteins) RN - 0 (Merozoite Surface Protein 1) RN - 0 (Protozoan Proteins) RN - 0 (Vaccines, DNA) RN - 0 (apical membrane antigen I, Plasmodium) RN - 0 (erythrocyte-binding antigen 175, Plasmodium) SB - IM MH - Animals MH - Antibodies, Protozoan/blood MH - Antigens, Protozoan/genetics MH - Aotus trivirgatus MH - Base Sequence MH - Carrier Proteins/genetics/immunology MH - Immunization MH - Immunization Schedule MH - Malaria Vaccines/*administration & dosage MH - Malaria, Falciparum/immunology/prevention & control MH - Membrane Proteins/genetics/immunology MH - Merozoite Surface Protein 1/genetics/immunology MH - Plasmids/genetics MH - Plasmodium falciparum/genetics/growth & development/*immunology MH - Protozoan Proteins/genetics/immunology MH - Vaccines, DNA/*administration & dosage EDAT- 2002/02/23 10:00 MHDA- 2002/09/28 04:00 CRDT- 2002/02/23 10:00 PHST- 2002/02/23 10:00 [pubmed] PHST- 2002/09/28 04:00 [medline] PHST- 2002/02/23 10:00 [entrez] AID - S0264410X01005138 [pii] AID - 10.1016/s0264-410x(01)00513-8 [doi] PST - ppublish SO - Vaccine. 2002 Feb 22;20(11-12):1675-80. doi: 10.1016/s0264-410x(01)00513-8.