Immunogenicity of a novel DNA vaccine cassette expressing multiple human immunodeficiency virus (HIV-1) accessory genes
作者:
Velpandi Ayyavoo,
Sagar Kudchodkar,
Mathura Ramanathan,
Phong Le,
Karuppiah Muthumani,
Natesan Mani Megalai,
Tzvete Dentchev,
Limaris Santiago-Barrios,
Conjeevaram Mrinalini,
David Weiner,
期刊:
AIDS
(OVID Available online 2000)
卷期:
Volume 14,
issue 1
页码: 1-9
ISSN:0269-9370
年代: 2000
出版商: OVID
关键词: HIV-1;fusion protein;immunogen;vaccine;gene construct;immune response;T helper cell;cell-mediated response
数据来源: OVID
摘要:
ObjectiveTo develop an HIV-1 accessory gene immunogen using a DNA vaccine approach.MethodsHIV-1 accessory genesvif,vpuandnefwere modified to express under the control of a single promoter with cellular proteolytic cleavage sites between the coding sequences (VVN-P). Immune responses induced by these constructs were evaluated in mice.ResultsPDNA vaccine construct (pVVN-P) expressing Vif, Vpu and Nef was processed and the fusion protein was cleaved appropriately. Vif, Vpu and Nef as a fusion protein with proteolytic cleavage sites (VVN-P) is able to induce a significant level of cellular immune responses. We also observed that accessory genes Vif, Vpu and Nef (VVN-P) induced an effective T helper 1 proliferative response measured by cytokine production. Furthermore, expression cassette pVVN-P was able to induce cytotoxic T lymphocyte (CTL) responses against diverse HIV-1 viruses in infected target cells.ConclusionWe conclude that cell-mediated immune responses induced by accessory gene constructs from clade B may have a broader recognition of divergent HIV-1 viruses and should be further examined for both prophylactic and therapeutic vaccination schemes against HIV-1.
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