| Autor: |
Wikramaratna PS; Department of Zoology, University of Oxford, Oxford OX1 3PS, UK., Lourenço J; Department of Zoology, University of Oxford, Oxford OX1 3PS, UK., Klenerman P; Nuffield Department of Clinical Medicine, University of Oxford, Oxford OX3 7BN, UK., Pybus OG; Department of Zoology, University of Oxford, Oxford OX1 3PS, UK., Gupta S; Department of Zoology, University of Oxford, Oxford OX1 3PS, UK sunetra.gupta@zoo.ox.ac.uk. |
| Abstrakt: |
Despite substantial advances in our knowledge of immune responses against HIV-1 and of its evolution within the host, it remains unclear why control of the virus eventually breaks down. Here, we present a new theoretical framework for the infection dynamics of HIV-1 that combines antibody and CD8(+) T-cell responses, notably taking into account their different lifespans. Several apparent paradoxes in HIV pathogenesis and genetics of host susceptibility can be reconciled within this framework by assigning a crucial role to antibody responses in the control of viraemia. We argue that, although escape from or progressive loss of quality of CD8(+) T-cell responses can accelerate disease progression, the underlying cause of the breakdown of virus control is the loss of antibody induction due to depletion of CD4(+) T cells. Furthermore, strong antibody responses can prevent CD8(+) T-cell escape from occurring for an extended period, even in the presence of highly efficacious CD8(+) T-cell responses. |
