A delay-differential equation model of HIV infection of CD4+ T-cells

Rebecca V. Culshaw, Shigui Ruan

Research output: Contribution to journalArticle

360 Citations (Scopus)

Abstract

A.S. Perelson, D.E. Kirschner and R. De Boer (Math. Biosci. 114 (1993) 81) proposed an ODE model of cell-free viral spread of human immunodeficiency virus (HIV) in a well-mixed compartment such as the bloodstream. Their model consists of four components: uninfected healthy CD4+ T-cells, latently infected CD4+ T-cells, actively infected CD4+ T-cells, and free virus. This model has been important in the field of mathematical modeling of HIV infection and many other models have been proposed which take the model of Perelson, Kirschner and De Boer as their inspiration, so to speak (see a recent survey paper by A.S. Perelson and P.W. Nelson (SIAM Rev. 41 (1999) 3- 44)). We first simplify their model into one consisting of only three components: the healthy CD4+ T-cells, infected CD4+ T-cells, and free virus and discuss the existence and stability of the infected steady state. Then, we introduce a discrete time delay to the model to describe the time between infection of a CD4+ T-cell and the emission of viral particles on a cellular level (see A.V.M. Herz, S. Bonhoeffer, R.M. Anderson, R.M. May, M.A. Nowak [Proc. Nat. Acad. Sci. USA 93 (1996) 7247]). We study the effect of the time delay on the stability of the endemically infected equilibrium, criteria are given to ensure that the infected equilibrium is asymptotically stable for all delay. Numerical simulations are presented to illustrate the results. (C) 2000 Elsevier Science Inc.

Original languageEnglish (US)
Pages (from-to)27-39
Number of pages13
JournalMathematical Biosciences
Volume165
Issue number1
DOIs
StatePublished - May 2000
Externally publishedYes

Fingerprint

T-cells
HIV infections
Virus Diseases
human immunodeficiency virus
Delay Differential Equations
Viruses
Virus
Infection
Differential equations
T-lymphocytes
HIV
T-Lymphocytes
Time delay
Model
virus
viruses
Human immunodeficiency virus
Virion
Human
infection

Keywords

  • Characteristic equation
  • HIV infection
  • Intercellular delay
  • Stability
  • Steady state

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Ecology, Evolution, Behavior and Systematics

Cite this

A delay-differential equation model of HIV infection of CD4+ T-cells. / Culshaw, Rebecca V.; Ruan, Shigui.

In: Mathematical Biosciences, Vol. 165, No. 1, 05.2000, p. 27-39.

Research output: Contribution to journalArticle

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