ELNKWA-epitope specific antibodies induced by epitope-vaccine recognize ELDKWA- and other two neutralizing-resistant mutated epitopes on HIV-1 gp41

Xiao Nan Dong, Yi Xiao, Ying Hua Chen

Research output: Contribution to journalArticle

9 Scopus citations


Based on the fact that monoclonal antibody (mAb) 2F5 recognizing ELDKWA-epitope on HIV-1 gp41 separately or in combination with other mAbs showed potent neutralizing activity to a wide range of primary HIV-1 isolates in vivo and in vitro, but this epitope undergoes restricted mutation. ELNKWA is a neutralizing-resistant mutated epitope. We induced ELNKWA-epitope-specific polyclonal and monoclonal antibodies and studied the interaction of the antibodies with ELDKWA-epitope and other two neutralizing-resistant mutated epitopes. The candidate ELNKWA-epitope-vaccine induced a high level of antibodies to the ELNKWA-epitope-peptide. The ELNKWA-epitope-specific polyclonal antibodies bound not only the ELNKWA-, but also ELDKWA-, ELEKWA- and ELDEWA-epitope-peptides in ELISA-assay. Moreover, the antibodies also recognized four C-domain-peptides (P5, P6, P7, P8) which contain these four epitopes, respectively. Interestingly, an ELNKWA-epitope-specific monoclonal antibody (TH-Ab1) induced by the candidate ELNKWA-epitope-vaccine could also recognize the four C-domain-peptides containing ELNKWA-, ELDKWA-, ELEKWA- and ELDEWK-epitopes. These results indicate that the candidate ELNKWA-epitope-vaccine could induce high levels of antibodies, which recognize the neutralizing epitope ELDKWA and three neutralizing-resistant mutated epitopes, suggesting that the candidate ELNKWA-epitope-vaccine may help to overcome the problem of viral escape from neutralization through mutation at D or K position, and may be developed as an effective vaccine with a broad neutralizing activity against HIV-1.

Original languageEnglish (US)
Pages (from-to)149-152
Number of pages4
JournalImmunology Letters
Issue number2
Publication statusPublished - Jan 1 2001



  • ELDKWA-epitope
  • ELNKWA-epitope
  • Epitope-vaccine
  • HIV-1

ASJC Scopus subject areas

  • Immunology
  • Immunology and Allergy

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