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Volume 21, Issue 4
Dynamics Analysis of HIV-1 Infection Model with CTL Immune Response and Delays

Ting Guo & Fei Zhao

Int. J. Numer. Anal. Mod., 21 (2024), pp. 560-586.

Published online: 2024-06

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  • Abstract

In this paper, we rigorously analyze an HIV-1 infection model with CTL immune response and three time delays which represent the latent period, virus production period and immune response delay, respectively. We begin this model with proving the positivity and boundedness of the solution. For this model, the basic reproduction number $R_0$ and the immune reproduction number $R_1$ are identified. Moreover, we have shown that the model has three equilibria, namely the infection-free equilibrium $E_0,$ the infectious equilibrium without immune response $E_1$ and the infectious equilibrium with immune response $E_2.$ By applying fluctuation lemma and Lyapunov functionals, we have demonstrated that the global stability of $E_0$ and $E_1$ are only related to $R_0$ and $R_1.$ The local stability of the third equilibrium is obtained under four situations. Further, we give the conditions for the existence of Hopf bifurcation. Finally, some numerical simulations are carried out for illustrating the theoretical results.

  • AMS Subject Headings

92B05, 34D23

  • Copyright

COPYRIGHT: © Global Science Press

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@Article{IJNAM-21-560, author = {Guo , Ting and Zhao , Fei}, title = {Dynamics Analysis of HIV-1 Infection Model with CTL Immune Response and Delays}, journal = {International Journal of Numerical Analysis and Modeling}, year = {2024}, volume = {21}, number = {4}, pages = {560--586}, abstract = {

In this paper, we rigorously analyze an HIV-1 infection model with CTL immune response and three time delays which represent the latent period, virus production period and immune response delay, respectively. We begin this model with proving the positivity and boundedness of the solution. For this model, the basic reproduction number $R_0$ and the immune reproduction number $R_1$ are identified. Moreover, we have shown that the model has three equilibria, namely the infection-free equilibrium $E_0,$ the infectious equilibrium without immune response $E_1$ and the infectious equilibrium with immune response $E_2.$ By applying fluctuation lemma and Lyapunov functionals, we have demonstrated that the global stability of $E_0$ and $E_1$ are only related to $R_0$ and $R_1.$ The local stability of the third equilibrium is obtained under four situations. Further, we give the conditions for the existence of Hopf bifurcation. Finally, some numerical simulations are carried out for illustrating the theoretical results.

}, issn = {2617-8710}, doi = {https://doi.org/10.4208/ijnam2024-1022}, url = {http://global-sci.org/intro/article_detail/ijnam/23202.html} }
TY - JOUR T1 - Dynamics Analysis of HIV-1 Infection Model with CTL Immune Response and Delays AU - Guo , Ting AU - Zhao , Fei JO - International Journal of Numerical Analysis and Modeling VL - 4 SP - 560 EP - 586 PY - 2024 DA - 2024/06 SN - 21 DO - http://doi.org/10.4208/ijnam2024-1022 UR - https://global-sci.org/intro/article_detail/ijnam/23202.html KW - HIV-1, Delays, Stability, Hopf bifurcation, Lyapunov functionals. AB -

In this paper, we rigorously analyze an HIV-1 infection model with CTL immune response and three time delays which represent the latent period, virus production period and immune response delay, respectively. We begin this model with proving the positivity and boundedness of the solution. For this model, the basic reproduction number $R_0$ and the immune reproduction number $R_1$ are identified. Moreover, we have shown that the model has three equilibria, namely the infection-free equilibrium $E_0,$ the infectious equilibrium without immune response $E_1$ and the infectious equilibrium with immune response $E_2.$ By applying fluctuation lemma and Lyapunov functionals, we have demonstrated that the global stability of $E_0$ and $E_1$ are only related to $R_0$ and $R_1.$ The local stability of the third equilibrium is obtained under four situations. Further, we give the conditions for the existence of Hopf bifurcation. Finally, some numerical simulations are carried out for illustrating the theoretical results.

Guo , Ting and Zhao , Fei. (2024). Dynamics Analysis of HIV-1 Infection Model with CTL Immune Response and Delays. International Journal of Numerical Analysis and Modeling. 21 (4). 560-586. doi:10.4208/ijnam2024-1022
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