Mature HIV-like particles produced from single semliki forest virus-derived expression vector

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Title
Mature HIV-like particles produced from single semliki forest virus-derived expression vector
Author(s)
E Kim; Haryoung Poo; M H Sung; C J Kim
Bibliographic Citation
Journal of Microbiology and Biotechnology, vol. 15, no. 6, pp. 1229-1239
Publication Year
2005
Abstract
Human immunodeficiency virus-like particles (HIV-VLPs) with native conformations similar to that of the wild-type virion could be valid candidates for vaccine development. To this end, we used a Semliki Forest Virus (SFV) expression system to produce HIV-VLPs containing high quantities of native envelope proteins. Here, we described a single SFV replicon containing the HIV gagpol and env genes under the control of separate subgenomic promoters. Mature VLPs incorporating the Gag and Env proteins were detected in the supernatant of replicon-expressing cells by Western blot analysis. The HIV-VLPs showed the expected molecular density (1.14-1.18 g/ml) on a 20-60% sucrose gradient; the particles were 100-120 nm in diameter and Env proteins were observed on their surfaces by immunogold electron microscopy. RT-PCR analysis of VLP-associated RNAs in mature HIV-VLPs revealed two SFV-derived RNA species (full-length and subgenomic). Immunization studies in Balb/c mice showed that these HIV-VLPs were capable of inducing both HIV-specific antibodies and cell-mediated immune responses. Taken together, our results indicate that the SFV replicon system is useful for the production of HIV-VLPs, which may be valuable candidates for an HIV vaccine.
Keyword
HIV-1semliki forest virus vectorvaccinevirus-like praticle
ISSN
1017-7825
Publisher
Korea Soc-Assoc-Inst
Type
Article
Appears in Collections:
Division of Research on National Challenges > Infectious Disease Research Center > 1. Journal Articles
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