A new epitope presenting system displays a HIV-1 V3 loop sequence and induces neutralizing antibodies

Eduardo A. Scodeller, Sergio G. Tisminetzky, Fabiola Porro, Monica Schiappacassi, Anita De Rossi, Luigi Chiecco-Bianchi, Francisco E. Baralle

Research output: Contribution to journalArticlepeer-review


The principal neutralizing domain, IGPGRAF sequence, from the V3-loop of HIV-1 was inserted in two positions on the surface of the protein that makes up the capside shell of the insect Flock House Virus. The hybrid proteins were expressed in insect cells via recombinant baculoviruses. Three different hybrids were used as immunogens: two with a single copy of the insert in different positions of the carrier protein and a third with two copies of the insert at the same positions as before. All hybrid proteins induced strong and broad specific immune response in guinea pigs against different V3-loop sequences. However, only one of the hybrid proteins was able to induce a strong neutralizing response against MN and IIIB HIV-1 isolates. Our results demonstrate that a very short peptide sequence of HIV-1 cna constitute a valuable immunogen able to induce a neutralizing response if presented to the immune system in the context of the FHV capsomer structure.

Original languageEnglish
Pages (from-to)1233-1239
Number of pages7
Issue number13
Publication statusPublished - 1995


  • Flock House Virus
  • HIV-1 V3 loop epitope
  • neutralizing antibodies

ASJC Scopus subject areas

  • Molecular Medicine
  • Immunology and Microbiology(all)
  • Infectious Diseases
  • Public Health, Environmental and Occupational Health
  • veterinary(all)
  • Immunology
  • Microbiology
  • Virology


Dive into the research topics of 'A new epitope presenting system displays a HIV-1 V3 loop sequence and induces neutralizing antibodies'. Together they form a unique fingerprint.

Cite this