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Antigenicity and immunogenicity of RV144 vaccine AIDSVAX clade E envelope immunogen is enhanced by a gp120 N-terminal deletion.

Publication ,  Journal Article
Alam, SM; Liao, H-X; Tomaras, GD; Bonsignori, M; Tsao, C-Y; Hwang, K-K; Chen, H; Lloyd, KE; Bowman, C; Sutherland, L; Jeffries, TL; Kozink, DM ...
Published in: J Virol
February 2013

An immune correlates analysis of the RV144 HIV-1 vaccine trial revealed that antibody responses to the gp120 V1/V2 region correlated inversely with infection risk. The RV144 protein immunogens (A244-rp120 and MN-rgp120) were modified by an N-terminal 11-amino-acid deletion (Δ11) and addition of a herpes simplex virus (HSV) gD protein-derived tag (gD). We investigated the effects of these modifications on gp120 expression, antigenicity, and immunogenicity by comparing unmodified A244 gp120 with both Δ11 deletion and gD tag and with Δ11 only. Analysis of A244 gp120, with or without Δ11 or gD, demonstrated that the Δ11 deletion, without the addition of gD, was sufficient for enhanced antigenicity to gp120 C1 region, conformational V2, and V1/V2 gp120 conformational epitopes. RV144 vaccinee serum IgGs bound more avidly to A244 gp120 Δ11 than to the unmodified gp120, and their binding was blocked by C1, V2, and V1/V2 antibodies. Rhesus macaques immunized with the three different forms of A244 gp120 proteins gave similar levels of gp120 antibody titers, although higher antibody titers developed earlier in A244 Δ11 gp120-immunized animals. Conformational V1/V2 monoclonal antibodies (MAbs) gave significantly higher levels of blocking of plasma IgG from A244 Δ11 gp120-immunized animals than IgG from animals immunized with unmodified A244 gp120, thus indicating a qualitative difference in the V1/V2 antibodies induced by A244 Δ11 gp120. These results demonstrate that deletion of N-terminal residues in the RV144 A244 gp120 immunogen improves both envelope antigenicity and immunogenicity.

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Published In

J Virol

DOI

EISSN

1098-5514

Publication Date

February 2013

Volume

87

Issue

3

Start / End Page

1554 / 1568

Location

United States

Related Subject Headings

  • Virology
  • Sequence Deletion
  • Macaca mulatta
  • Humans
  • HIV Envelope Protein gp120
  • HIV Antibodies
  • Epitopes
  • Antibody Affinity
  • Animals
  • AIDS Vaccines
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Alam, S. M., Liao, H.-X., Tomaras, G. D., Bonsignori, M., Tsao, C.-Y., Hwang, K.-K., … Haynes, B. F. (2013). Antigenicity and immunogenicity of RV144 vaccine AIDSVAX clade E envelope immunogen is enhanced by a gp120 N-terminal deletion. J Virol, 87(3), 1554–1568. https://doi.org/10.1128/JVI.00718-12
Alam, S Munir, Hua-Xin Liao, Georgia D. Tomaras, Mattia Bonsignori, Chun-Yen Tsao, Kwan-Ki Hwang, Haiyan Chen, et al. “Antigenicity and immunogenicity of RV144 vaccine AIDSVAX clade E envelope immunogen is enhanced by a gp120 N-terminal deletion.J Virol 87, no. 3 (February 2013): 1554–68. https://doi.org/10.1128/JVI.00718-12.
Alam SM, Liao H-X, Tomaras GD, Bonsignori M, Tsao C-Y, Hwang K-K, et al. Antigenicity and immunogenicity of RV144 vaccine AIDSVAX clade E envelope immunogen is enhanced by a gp120 N-terminal deletion. J Virol. 2013 Feb;87(3):1554–68.
Alam, S. Munir, et al. “Antigenicity and immunogenicity of RV144 vaccine AIDSVAX clade E envelope immunogen is enhanced by a gp120 N-terminal deletion.J Virol, vol. 87, no. 3, Feb. 2013, pp. 1554–68. Pubmed, doi:10.1128/JVI.00718-12.
Alam SM, Liao H-X, Tomaras GD, Bonsignori M, Tsao C-Y, Hwang K-K, Chen H, Lloyd KE, Bowman C, Sutherland L, Jeffries TL, Kozink DM, Stewart S, Anasti K, Jaeger FH, Parks R, Yates NL, Overman RG, Sinangil F, Berman PW, Pitisuttithum P, Kaewkungwal J, Nitayaphan S, Karasavva N, Rerks-Ngarm S, Kim JH, Michael NL, Zolla-Pazner S, Santra S, Letvin NL, Harrison SC, Haynes BF. Antigenicity and immunogenicity of RV144 vaccine AIDSVAX clade E envelope immunogen is enhanced by a gp120 N-terminal deletion. J Virol. 2013 Feb;87(3):1554–1568.

Published In

J Virol

DOI

EISSN

1098-5514

Publication Date

February 2013

Volume

87

Issue

3

Start / End Page

1554 / 1568

Location

United States

Related Subject Headings

  • Virology
  • Sequence Deletion
  • Macaca mulatta
  • Humans
  • HIV Envelope Protein gp120
  • HIV Antibodies
  • Epitopes
  • Antibody Affinity
  • Animals
  • AIDS Vaccines