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Neutralization of genetically diverse HIV-1 strains by IgA antibodies to the gp120-CD4-binding site from long-term survivors of HIV infection.

Publication ,  Journal Article
Planque, S; Salas, M; Mitsuda, Y; Sienczyk, M; Escobar, MA; Mooney, JP; Morris, M-K; Nishiyama, Y; Ghosh, D; Kumar, A; Gao, F; Hanson, CV; Paul, S
Published in: AIDS
March 27, 2010

OBJECTIVE: To identify an HIV epitope suitable for vaccine development. DESIGN: Diverse HIV-1 strains express few structurally constant regions on their surface vulnerable to neutralizing antibodies. The mostly conserved CD4-binding site (CD4BS) of gp120 is essential for host cell binding and infection by the virus. Antibodies that recognize the CD4BS are rare, and one component of the CD4BS, the 421-433 peptide region, expresses B-cell superantigenic character, a property predicted to impair the anti-CD4BS adaptive immune response. METHODS: IgA samples purified from the plasma of patients with HIV infection were analyzed for the ability to bind synthetic mimetics containing the 416-433 gp120 region and full-length gp120. Infection of peripheral blood mononuclear cells by clinical HIV isolates was measured by p24 ELISA. RESULTS: IgA preparations from three patients with subtype B infection for 19-21 years neutralized heterologous, coreceptor CCR5-dependent subtype A, B, C, D, and AE strains with exceptional potency. The IgAs displayed specific binding of a synthetic 416-433 peptide mimetic dependent on recognition of the CD4-binding residues located in this region. Immunoadsorption, affinity chromatography, and mutation procedures indicated that HIV neutralization occurred by IgA recognition of the CD4BS. CONCLUSION: These observations identify the 421-433 peptide region as a vulnerable HIV site to which survivors of infection can produce powerful neutralizing antibodies. This indicates that the human immune system can bypass restrictions on the adaptive B cell response to the CD4BS, opening the route to targeting the 421-433 region for attaining control of HIV infection.

Duke Scholars

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Published In

AIDS

DOI

EISSN

1473-5571

Publication Date

March 27, 2010

Volume

24

Issue

6

Start / End Page

875 / 884

Location

England

Related Subject Headings

  • Virology
  • Survivors
  • Neutralization Tests
  • Humans
  • HIV-1
  • HIV Infections
  • HIV Envelope Protein gp120
  • Epitopes
  • Enzyme-Linked Immunosorbent Assay
  • CD4 Antigens
 

Citation

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MLA
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Planque, S., Salas, M., Mitsuda, Y., Sienczyk, M., Escobar, M. A., Mooney, J. P., … Paul, S. (2010). Neutralization of genetically diverse HIV-1 strains by IgA antibodies to the gp120-CD4-binding site from long-term survivors of HIV infection. AIDS, 24(6), 875–884. https://doi.org/10.1097/QAD.0b013e3283376e88
Planque, Stephanie, Maria Salas, Yukie Mitsuda, Marcin Sienczyk, Miguel A. Escobar, Jason P. Mooney, Mary-Kate Morris, et al. “Neutralization of genetically diverse HIV-1 strains by IgA antibodies to the gp120-CD4-binding site from long-term survivors of HIV infection.AIDS 24, no. 6 (March 27, 2010): 875–84. https://doi.org/10.1097/QAD.0b013e3283376e88.
Planque S, Salas M, Mitsuda Y, Sienczyk M, Escobar MA, Mooney JP, et al. Neutralization of genetically diverse HIV-1 strains by IgA antibodies to the gp120-CD4-binding site from long-term survivors of HIV infection. AIDS. 2010 Mar 27;24(6):875–84.
Planque, Stephanie, et al. “Neutralization of genetically diverse HIV-1 strains by IgA antibodies to the gp120-CD4-binding site from long-term survivors of HIV infection.AIDS, vol. 24, no. 6, Mar. 2010, pp. 875–84. Pubmed, doi:10.1097/QAD.0b013e3283376e88.
Planque S, Salas M, Mitsuda Y, Sienczyk M, Escobar MA, Mooney JP, Morris M-K, Nishiyama Y, Ghosh D, Kumar A, Gao F, Hanson CV, Paul S. Neutralization of genetically diverse HIV-1 strains by IgA antibodies to the gp120-CD4-binding site from long-term survivors of HIV infection. AIDS. 2010 Mar 27;24(6):875–884.

Published In

AIDS

DOI

EISSN

1473-5571

Publication Date

March 27, 2010

Volume

24

Issue

6

Start / End Page

875 / 884

Location

England

Related Subject Headings

  • Virology
  • Survivors
  • Neutralization Tests
  • Humans
  • HIV-1
  • HIV Infections
  • HIV Envelope Protein gp120
  • Epitopes
  • Enzyme-Linked Immunosorbent Assay
  • CD4 Antigens