» Articles » PMID: 11264355

Modulation of Different Human Immunodeficiency Virus Type 1 Nef Functions During Progression to AIDS

Overview
Journal J Virol
Date 2001 Mar 27
PMID 11264355
Citations 81
Authors
Affiliations
Soon will be listed here.
Abstract

The human immunodeficiency virus type 1 (HIV-1) Nef protein has several independent functions that might contribute to efficient viral replication in vivo. Since HIV-1 adapts rapidly to its host environment, we investigated if different Nef properties are associated with disease progression. Functional analysis revealed that nef alleles obtained during late stages of infection did not efficiently downmodulate class I major histocompatibility complex but were highly active in the stimulation of viral replication. In comparison, functional activity in downregulation of CD4 and enhancement of HIV-1 infectivity were maintained or enhanced after AIDS progression. Our results demonstrate that various Nef activities are modulated during the course of HIV-1 infection to maintain high viral loads at different stages of disease progression. These findings suggest that all in vitro Nef functions investigated contribute to AIDS pathogenesis and indicate that nef variants with increased pathogenicity emerge in a significant number of HIV-1-infected individuals.

Citing Articles

Nef mediates neuroimmune response, myelin impairment, and neuronal injury in EcoHIV-infected mice.

Schenck J, Clarkson-Paredes C, Pushkarsky T, Wang Y, Miller R, Bukrinsky M Life Sci Alliance. 2024; 8(2).

PMID: 39532531 PMC: 11557684. DOI: 10.26508/lsa.202402879.


HIV Productively Infects Highly Differentiated and Exhausted CD4+ T Cells During AIDS.

Faua C, Ursenbach A, Fuchs A, Caspar S, Jegou F, Ruch Y Pathog Immun. 2024; 8(2):92-114.

PMID: 38420260 PMC: 10901154. DOI: 10.20411/pai.v8i2.638.


HIV-1 subtype C Nef-mediated SERINC5 down-regulation significantly contributes to overall Nef activity.

Naicker D, Sonela N, Jin S, Mulaudzi T, Ojwach D, Reddy T Retrovirology. 2023; 20(1):3.

PMID: 37004071 PMC: 10067162. DOI: 10.1186/s12977-023-00618-7.


Nef enhances HIV-1 replication and infectivity independently of SERINC5 in CEM T cells.

Ramirez P, Vollbrecht T, Acosta F, Suarez M, Angerstein A, Wallace J Virology. 2022; 578:154-162.

PMID: 36577173 PMC: 10484624. DOI: 10.1016/j.virol.2022.12.008.


HIV-1 Nef-mediated downregulation of CD155 results in viral restriction by KIR2DL5+ NK cells.

Fittje P, Hoelzemer A, Garcia-Beltran W, Vollmers S, Niehrs A, Hagemann K PLoS Pathog. 2022; 18(6):e1010572.

PMID: 35749424 PMC: 9231786. DOI: 10.1371/journal.ppat.1010572.


References
1.
Greenough T, Brettler D, Kirchhoff F, Alexander L, Desrosiers R, OBrien S . Long-term nonprogressive infection with human immunodeficiency virus type 1 in a hemophilia cohort. J Infect Dis. 1999; 180(6):1790-802. DOI: 10.1086/315128. View

2.
Desrosiers R . Strategies used by human immunodeficiency virus that allow persistent viral replication. Nat Med. 1999; 5(7):723-5. DOI: 10.1038/10439. View

3.
Swigut T, Iafrate A, MUENCH J, Kirchhoff F, Skowronski J . Simian and human immunodeficiency virus Nef proteins use different surfaces to downregulate class I major histocompatibility complex antigen expression. J Virol. 2000; 74(12):5691-701. PMC: 112057. DOI: 10.1128/jvi.74.12.5691-5701.2000. View

4.
Iafrate A, Carl S, Bronson S, Stahl-Hennig C, Swigut T, Skowronski J . Disrupting surfaces of nef required for downregulation of CD4 and for enhancement of virion infectivity attenuates simian immunodeficiency virus replication in vivo. J Virol. 2000; 74(21):9836-44. PMC: 102020. DOI: 10.1128/jvi.74.21.9836-9844.2000. View

5.
Fultz P, McClure H, Anderson D, Switzer W . Identification and biologic characterization of an acutely lethal variant of simian immunodeficiency virus from sooty mangabeys (SIV/SMM). AIDS Res Hum Retroviruses. 1989; 5(4):397-409. DOI: 10.1089/aid.1989.5.397. View