Differences in the B and T cell immune response to the envelope glycoprotein 130 (gp130) of the macaque strain of simian immunodeficiency virus (SIVmac), induced by immunization of rhesus macaques with virus-derived or vaccinia virus-expressed gp130.
Rhesus macaques were immunized with purified virus-derived simian immunodeficiency virus of macaques (SIVmac) 251/32H glycoprotein 130 (gp130) or primed with recombinant vaccinia virus (VV) expressing the env gene of the SIVmac BK28 clone and boosted subsequently with virus-derived gp130. High antibody titres of at least 10(4) against recombinant gp140 were induced with both vaccines. Analysis of the antibody specificity with a peptide ELISA revealed that different linear epitopes were recognized after administration of virus-derived gp130 compared with those after priming with VV. Antibodies to some epitopes (peptides 10 and 49), which were also found in SIV-infected animals, were induced with both vaccines, whereas antibodies to other regions were induced by only one vaccine preparation. The analysis of the helper T cell response revealed a poor immunogenicity of the virus-derived gp130, whereas priming with VV induced a considerable helper T cell activity in all three vaccinees after the second VV infection. Using synthetic peptides, several epitopes were identified. Our observations show that immunization with a virus-derived gp130 or live recombinant VV induces a considerably different antibody and helper T cell response. These differences in immunogenicity might have important implications for further vaccine development.
Deutsches Primatenzentrum, Abteilung für Virologie und Immunologie, Göttingen, Germany.
G
G
Voss
U
U
Dittmer
C
C
Coulibaly
B
B
Makoschey
H
H
Petry
W
W
Lüke
G
G
Hunsmann
D000595:Amino Acid Sequence; D000818:Animals; D000914:Antibodies, Viral / Q000097:blood*; D000918:Antibody Specificity; D001402:B-Lymphocytes / Q000276:immunology*; D015704:CD4 Antigens / Q000032:analysis; D002460:Cell Line; D004797:Enzyme-Linked Immunosorbent Assay; D015686:Gene Products, env; D015683:Gene Products, gag / Q000096:biosynthesis / Q000276:immunology*; D005822:Genetic Vectors; D000949:Histocompatibility Antigens Class II / Q000032:analysis; D006801:Humans; D016130:Immunophenotyping; D008213:Lymphocyte Activation; D008253:Macaca mulatta; D008969:Molecular Sequence Data; D011994:Recombinant Proteins / Q000276:immunology; D012191:Retroviridae Proteins; D015302:Simian Immunodeficiency Virus / Q000235:genetics / Q000276:immunology*; D016176:T-Lymphocyte Subsets / Q000276:immunology; D013601:T-Lymphocytes / Q000276:immunology*; D006377:T-Lymphocytes, Helper-Inducer / Q000276:immunology; D014616:Vaccinia virus / Q000235:genetics; D014759:Viral Envelope Proteins
D000914:Antibodies, Viral; D015704:CD4 Antigens; D015686:Gene Products, env; D015683:Gene Products, gag; D000949:Histocompatibility Antigens Class II; D011994:Recombinant Proteins; D012191:Retroviridae Proteins; D014759:Viral Envelope Proteins; C078684:simian immunodeficiency virus gp130