TY - JOUR
T1 - Epitope-vaccine induces high levels of ELDKWA-epitope-specific neutralizing antibody
AU - Xiao, Yi
AU - Zhao, Yingxu
AU - Lu, Yun
AU - Chen, Ying Hua
N1 - Funding Information:
This work was supported by the Ministry of Education, NSFC-39770696 and NSFC-
PY - 2000
Y1 - 2000
N2 - Based on the fact that mAb 2F5 recognizing ELDKWA-epitope on the C- domain of HIV-1 gp41 has significant neutralization potency against 90% of the investigated viruses of African, Asian, American and European strains, we attempted to characterise immunogenicity of the ELDKWA-epitope on an epitope- vaccine, and to produce ELDKWA-epitope-specific monoclonal antibodies (mAb) induced by the epitope-vaccine. The C-domain peptide (P2) and the ELDKWA- tetramer peptide [C(ELDKWAG)4] were conjugated with BSA or P24-EC (GPKEPFRDYVDRFYK, a peptide of HIV-1 gag-protein P24, proved to be a good carrier peptide to induce an immune response to the hapten on the conjugates[18])by different methods. After the vaccination course, two P2- BSA peptide-vaccines both induced a strong antibody response against the P2- peptide by about 1:12800-25600 dilution, and a weak antibody response against the ELDKWA-epitope (1:1600-3200). The P2-P24EC and P2 (conjugated with itself) peptide-vaccines could also induce a weak antibody response against the ELDKWA-epitope (1:1600-3200), while an rgp160 subunit vaccine induced a very weak antibody response (1:400). Interestingly, the ELDKWA-tetramer epitope-vaccine [C-(ELDKWAG)4-BSA] could induce a strong antibody response against the ELDKWA-epitope (1:12800-25600), i.e. It increased the level of ELDKWA-antibody eight-fold, clearly better than the P2 peptide-vaccine, and much better than the rgp160 subunit vaccine, which indicates that the immunogenicities of the ELDKWA-epitope on the ELDKWA-tetramer peptide, the C- domain peptide and rgp160 are very different. These results suggest that the ELDKWA-epitope-vaccine may be a new strategy for inducing high levels of epitope-specific neutralizing antibodies against HIV-1. Using hybridoma- technique, a mouse monoclonal antibody recognizing the ELDKWA-epitope on ELDKWA-peptide and C-domain peptide was produced by immunization with the C- (ELDKWAG)4-BSA epitope-vaccine, which indicates a new way to produce an epitope-specific mAb, namely immunization with epitope-vaccine instead of a natural or recombinant protein immunogen.
AB - Based on the fact that mAb 2F5 recognizing ELDKWA-epitope on the C- domain of HIV-1 gp41 has significant neutralization potency against 90% of the investigated viruses of African, Asian, American and European strains, we attempted to characterise immunogenicity of the ELDKWA-epitope on an epitope- vaccine, and to produce ELDKWA-epitope-specific monoclonal antibodies (mAb) induced by the epitope-vaccine. The C-domain peptide (P2) and the ELDKWA- tetramer peptide [C(ELDKWAG)4] were conjugated with BSA or P24-EC (GPKEPFRDYVDRFYK, a peptide of HIV-1 gag-protein P24, proved to be a good carrier peptide to induce an immune response to the hapten on the conjugates[18])by different methods. After the vaccination course, two P2- BSA peptide-vaccines both induced a strong antibody response against the P2- peptide by about 1:12800-25600 dilution, and a weak antibody response against the ELDKWA-epitope (1:1600-3200). The P2-P24EC and P2 (conjugated with itself) peptide-vaccines could also induce a weak antibody response against the ELDKWA-epitope (1:1600-3200), while an rgp160 subunit vaccine induced a very weak antibody response (1:400). Interestingly, the ELDKWA-tetramer epitope-vaccine [C-(ELDKWAG)4-BSA] could induce a strong antibody response against the ELDKWA-epitope (1:12800-25600), i.e. It increased the level of ELDKWA-antibody eight-fold, clearly better than the P2 peptide-vaccine, and much better than the rgp160 subunit vaccine, which indicates that the immunogenicities of the ELDKWA-epitope on the ELDKWA-tetramer peptide, the C- domain peptide and rgp160 are very different. These results suggest that the ELDKWA-epitope-vaccine may be a new strategy for inducing high levels of epitope-specific neutralizing antibodies against HIV-1. Using hybridoma- technique, a mouse monoclonal antibody recognizing the ELDKWA-epitope on ELDKWA-peptide and C-domain peptide was produced by immunization with the C- (ELDKWAG)4-BSA epitope-vaccine, which indicates a new way to produce an epitope-specific mAb, namely immunization with epitope-vaccine instead of a natural or recombinant protein immunogen.
KW - ELDKWA-epitope
KW - Epitope vaccine
KW - Immunogenicity
KW - Monoclonal antibody
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U2 - 10.3109/08820130009105143
DO - 10.3109/08820130009105143
M3 - Article
C2 - 10709845
AN - SCOPUS:0033998095
SN - 0882-0139
VL - 29
SP - 41
EP - 50
JO - Immunological Investigations
JF - Immunological Investigations
IS - 1
ER -