Human immunodeficiency virus type 1 Gag, Pol, and Nef antigens (HIV-1 Gag/Pol/Nef)

Human immunodeficiency virus type 1 (HIV-1) Gag, Pol, and Nef antigens are a combination of structural, enzymatic, and accessory proteins that serve as primary targets for cellular immune-based therapies and vaccines. Gag (Group-specific antigen) is a polyprotein precursor essential for viral assembly and maturation, providing the structural framework of the virion (UniProt P03367). Pol (Polymerase) encodes the critical enzymes protease, reverse transcriptase, and integrase, which are required for viral replication and the integration of the viral genome into the host cell (UniProt P03366). Nef (Negative factor) is an accessory protein that facilitates viral persistence and immune evasion by downregulating cell surface molecules such as CD4 and MHC-I (Roeth & Collins, 2006). In drug development, these antigens are typically delivered via viral vectors or DNA plasmids to stimulate robust CD8+ cytotoxic T-lymphocyte (CTL) responses capable of destroying infected cells (Buchbinder et al., 2008). Targeting these relatively conserved proteins aims to achieve a functional cure or provide broad protection against diverse HIV-1 clades by training the immune system to recognize essential viral components.

Other names

HIV-1 Gag-Pol-Nef fusion proteinHIV-1 polyprotein antigensHIV-1 Gag/Pol/Nef vaccine antigens

Induction of antigen-specific T-cell mediated immune responses, including CD8+ cytotoxic T-lymphocyte activity and CD4+ helper T-cell activation, to recognize and eliminate HIV-infected cells.