HIV-1 conserved regions in Gag, Pol, Vif, and Env (HIV-1 conserved regions)

HIV-1 conserved regions in Gag, Pol, Vif, and Env refer to specific, highly stable amino acid sequences within the HIV-1 proteome that are critical for the virus's structural integrity and replication cycle (UniProt, 2024). These regions are functionally constrained, meaning that mutations within them typically result in a significant loss of viral fitness, making them attractive targets for therapeutic vaccines and immunotherapies (Mothe et al., 2015). By directing the host's immune system, particularly CD8+ T-cells, toward these conserved epitopes, researchers aim to circumvent the virus's ability to escape immune detection through rapid mutation (Hancock et al., 2013). This strategy is central to the development of functional cure approaches, where the goal is to achieve long-term control of the virus in the absence of antiretroviral therapy (ART). Drugs and vaccines targeting these regions, such as the HTI (HIVACAT T-cell Immunogen), are currently in clinical trials to evaluate their ability to induce broad and potent T-cell responses across different HIV-1 subtypes (IrsiCaixa, 2023; ClinicalTrials.gov, 2024).

Other names

HIV-1 conserved epitopesHIV-1 conserved elements (CE)HIV-1 conserved proteomeHTI immunogen targetHIVCONSV target

Induction of broad, polyfunctional CD8+ and CD4+ T-cell responses targeting functionally constrained viral epitopes to prevent mutational escape and maintain viral suppression (Mothe et al., 2015; Borthwick et al., 2014).