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Current Estimates for HIV-1 Production Imply Rapid Viral Clearance in Lymphoid Tissues

Journal Article · · PLoS Computational Biology (Online)
 [1];  [2];  [2]
  1. Univ. of Utrecht (Netherlands). Theoretical Biology and Bioinformatics; DOE/OSTI
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Theoretical Biology and Biphysics
It has recently been estimated that a single HIV-1 infected cell produces between 103 and more than 104 viral particles over its life span. Since body-wide estimates of the ratio of free virus to productively infected cells are smaller than 103 and much smaller than 104, individual virions must be cleared rapidly. This seems difficult to reconcile with the fact that most of the total body virus is trapped on follicular dendritic cells where it can survive for many months. It has also been difficult to reconcile the vast difference in the rates at which the virus is cleared from the blood in rhesus macaques and in chronically infected patients. Here we attempt to reconcile these seemingly contradictory observations by considering the virion clearance rate in various organs and the virion exchange rates between them. The main results are that the per capita clearance rate of free virus in lymphoid tissue should be fast, the virion exchange rate between lymphoid tissue and the blood should be slow, and the comparatively slow previous estimates for the virion clearance rate from the blood correspond to the rate of virion efflux from the blood to other organs where the virus is ultimately cleared.
Research Organization:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER). Biological Systems Science Division
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1627203
Journal Information:
PLoS Computational Biology (Online), Journal Name: PLoS Computational Biology (Online) Journal Issue: 9 Vol. 6; ISSN 1553-7358
Publisher:
Public Library of ScienceCopyright Statement
Country of Publication:
United States
Language:
English

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Factors limiting the transmission of HIV mutations conferring drug resistance: fitness costs and genetic bottlenecks journal March 2012
Linking immunological and epidemiological dynamics of HIV: the case of super-infection journal December 2013
Notwithstanding Circumstantial Alibis, Cytotoxic T Cells Can Be Major Killers of HIV-1-Infected Cells journal May 2016
A hunter virus that targets both infected cells and HIV free virions: Implications for therapy journal December 2012
Immune Activation Promotes Evolutionary Conservation of T-Cell Epitopes in HIV-1 journal April 2013
Which of Our Modeling Predictions Are Robust? journal July 2012
Quantifying the Turnover of Transcriptional Subclasses of HIV-1-Infected Cells journal October 2014
Residual Viremia in Treated HIV+ Individuals journal January 2016
Modelling HIV and MTB Co-Infection Including Combined Treatment Strategies journal November 2012
Multi-dose Romidepsin Reactivates Replication Competent SIV in Post-antiretroviral Rhesus Macaque Controllers journal September 2016
Are microRNAs Important Players in HIV-1 Infection? An Update journal March 2018
Modelling the Course of an HIV Infection: Insights from Ecology and Evolution journal October 2012
Simple Mathematical Models Do Not Accurately Predict Early SIV Dynamics journal March 2015
The effect of interference on the CD8+ T cell escape rates in HIV preprint January 2014
Dynamics of HIV infection in lymphoid tissue network journal October 2015
Within-Host Viral Dynamics in a Multi-compartmental Environment journal August 2019
Human Immunodeficiency Virus Infection : from Biological Observations to Mechanistic Mathematical Modelling journal January 2012
Stochastic effects are important in intrahost HIV evolution even when viral loads are high journal October 2012
Impaired immune evasion in HIV through intracellular delays and multiple infection of cells journal April 2012
Identification of drug resistance mutations in HIV from constraints on natural evolution journal February 2016
Insight into treatment of HIV infection from viral dynamics models journal August 2018
Enhanced clearance of HIV-1-infected cells by broadly neutralizing antibodies against HIV-1 in vivo journal May 2016
From Individual Health to Community Health: Towards Multiscale Modeling of Directly Transmitted Infectious Disease Systems journal March 2019
Gene activity in primary T cells infected with HIV89.6: intron retention and induction of genomic repeats journal September 2015
Large Variations in HIV-1 Viral Load Explained by Shifting-Mosaic Metapopulation Dynamics journal October 2016
Stochastic Theory of Early Viral Infection: Continuous versus Burst Production of Virions journal February 2011
Gag-Pol Processing during HIV-1 Virion Maturation: A Systems Biology Approach journal June 2013
Hybrid Spreading Mechanisms and T Cell Activation Shape the Dynamics of HIV-1 Infection journal April 2015
Exploring an alternative explanation for the second phase of viral decay: Infection of short-lived cells in a drug-limited compartment during HAART journal July 2018
Identification of drug resistance mutations in HIV from constraints on natural evolution text January 2015

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