Modelling and analysis of dynamics of viral infection of cells and of interferon resistance
Interferons are active biomolecules, which help fight viral infections by spreading from infected to uninfected cells and activate effector molecules, which confer resistance from the virus on cells. We propose a new model of dynamics of viral infection, including endocytosis, cell death, production...
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| Hauptverfasser: | , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
19 March 2008
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| In: |
Journal of mathematical analysis and applications
Year: 2008, Jahrgang: 344, Heft: 2, Pages: 821-850 |
| ISSN: | 1096-0813 |
| DOI: | 10.1016/j.jmaa.2008.02.069 |
| Online-Zugang: | Resolving-System, kostenfrei, Volltext: http://dx.doi.org/10.1016/j.jmaa.2008.02.069 Verlag, kostenfrei, Volltext: http://www.sciencedirect.com/science/article/pii/S0022247X08002175 
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| Verfasserangaben: | Ph. Getto, M. Kimmel, A. Marciniak-Czochra |
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| 520 | |a Interferons are active biomolecules, which help fight viral infections by spreading from infected to uninfected cells and activate effector molecules, which confer resistance from the virus on cells. We propose a new model of dynamics of viral infection, including endocytosis, cell death, production of interferon and development of resistance. The novel element is a specific biologically justified mechanism of interferon action, which results in dynamics different from other infection models. The model reflects conditions prevailing in liquid cultures (ideal mixing), and the absence of cells or virus influx from outside. The basic model is a nonlinear system of five ordinary differential equations. For this variant, it is possible to characterise global behaviour, using a conservation law. Analytic results are supplemented by computational studies. The second variant of the model includes age-of-infection structure of infected cells, which is described by a transport-type partial differential equation for infected cells. The conclusions are: (i) If virus mortality is included, the virus becomes eventually extinct and subpopulations of uninfected and resistant cells are established. (ii) If virus mortality is not included, the dynamics may lead to extinction of uninfected cells. (iii) Switching off the interferon defense results in a decrease of the sum total of uninfected and resistant cells. (iv) Infection-age structure of infected cells may result in stabilisation or destabilisation of the system, depending on detailed assumptions. Our work seems to constitute the first comprehensive mathematical analysis of the cell-virus-interferon system based on biologically plausible hypotheses. | ||
| 650 | 4 | |a Asymptotic analysis | |
| 650 | 4 | |a Delay-differential equations | |
| 650 | 4 | |a Infection model | |
| 650 | 4 | |a Interferon signalling | |
| 650 | 4 | |a Linearised stability | |
| 650 | 4 | |a Mikhailov criterion | |
| 650 | 4 | |a Ordinary differential equations | |
| 650 | 4 | |a Structured population model | |
| 650 | 4 | |a Transport equation | |
| 650 | 4 | |a Viral infection | |
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