Abstract
HIV-1 exploits the cellular machinery to replicate in the host cells by targeting a wide range of host factors at different stages of its life cycle. HIV-1 also induces detrimental effects in the infected and uninfected bystander cells resulting in dysregulation including interference in immune effector functions. The latter is specifically linked to the immune evasion strategies of the virus. In addition to the essential roles of structural proteins (Gag, Pol & Env), HIV-1 encoded auxiliary proteins such as Nef, Vif, Vpu, and Vpr through their interaction with the host cellular partners facilitate viral replication and dissemination. HIV-1 Vpr, a virion-associated molecule, has been implicated to play a role in the early events in virus life cycle. Vpr is a pleiotropic protein that exerts a range of effects including inhibition of cell proliferation, induction of apoptosis and modulation of a number of immune molecules. These functions could be in part responsible for Vpr induced immune evasion and virus replication. Appreciating this view is the genetic variation in vpr gene reflected in the form of polymorphisms at the amino acid level that may contribute to the potential CTL escape of the virus. It is likely that Vpr mediated dysregulation of host immune response contributes, in part, to the progression of disease. This review focuses on the recent advances regarding HIV-1 Vpr mediated immunopathogenesis and the mechanistic insight from in vitro and in vivo studies.
Keywords: HIV-1 Vpr, immunopathogenesis, dendritic cells, T cells, NK cells, immune function
Current HIV Research
Title: HIV-1 Mediated Immune Pathogenesis: Spotlight on the Role of Viral Protein R (VPR)
Volume: 7 Issue: 2
Author(s): Biswanath Majumder, Narasimhan J. Venkatachari, Alagarsamy Srinivasan and Velpandi Ayyavoo
Affiliation:
Keywords: HIV-1 Vpr, immunopathogenesis, dendritic cells, T cells, NK cells, immune function
Abstract: HIV-1 exploits the cellular machinery to replicate in the host cells by targeting a wide range of host factors at different stages of its life cycle. HIV-1 also induces detrimental effects in the infected and uninfected bystander cells resulting in dysregulation including interference in immune effector functions. The latter is specifically linked to the immune evasion strategies of the virus. In addition to the essential roles of structural proteins (Gag, Pol & Env), HIV-1 encoded auxiliary proteins such as Nef, Vif, Vpu, and Vpr through their interaction with the host cellular partners facilitate viral replication and dissemination. HIV-1 Vpr, a virion-associated molecule, has been implicated to play a role in the early events in virus life cycle. Vpr is a pleiotropic protein that exerts a range of effects including inhibition of cell proliferation, induction of apoptosis and modulation of a number of immune molecules. These functions could be in part responsible for Vpr induced immune evasion and virus replication. Appreciating this view is the genetic variation in vpr gene reflected in the form of polymorphisms at the amino acid level that may contribute to the potential CTL escape of the virus. It is likely that Vpr mediated dysregulation of host immune response contributes, in part, to the progression of disease. This review focuses on the recent advances regarding HIV-1 Vpr mediated immunopathogenesis and the mechanistic insight from in vitro and in vivo studies.
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Cite this article as:
Majumder Biswanath, Venkatachari J. Narasimhan, Srinivasan Alagarsamy and Ayyavoo Velpandi, HIV-1 Mediated Immune Pathogenesis: Spotlight on the Role of Viral Protein R (VPR), Current HIV Research 2009; 7 (2) . https://dx.doi.org/10.2174/157016209787581445
DOI https://dx.doi.org/10.2174/157016209787581445 |
Print ISSN 1570-162X |
Publisher Name Bentham Science Publisher |
Online ISSN 1873-4251 |
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The development of a safe and effective vaccine that impedes HIV-1 transmission and/or limits the severity of infection remains a public health priority. The HIV-1/AIDS pandemic continues to have a disproportionate impact on vulnerable and under-served communities in the USA and globally. In the USA, minority communities that have relatively ...read more
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