Spatial Lymphocyte Dynamics in Lymph Nodes Predicts the Cytotoxic T Cell Frequency Needed for HIV Infection ControlстатьяИсследовательская статья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 1 августа 2019 г.
Аннотация:The surveillance of host body tissues by immune cells is central for mediating their
defense function. In vivo imaging technologies have been used to quantitatively
characterize target cell scanning and migration of lymphocytes within lymph nodes
(LNs). The translation of these quantitative insights into a predictive understanding of
immune system functioning in response to various perturbations critically depends on
computational tools linking the individual immune cell properties with the emergent
behavior of the immune system. By choosing the Newtonian second lawfor the governing
equations, we developed a broadly applicable mathematical model linking individual and
coordinated T-cell behaviors. The spatial cell dynamics is described by a superposition
of autonomous locomotion, intercellular interaction, and viscous damping processes.
The model is calibrated using in vivo data on T-cell motility metrics in LNs such as the
translational speeds, turning angle speeds, andmeandering indices. Themodel is applied
to predict the impact of T-cell motility on protection against HIV infection, i.e., to estimate the threshold frequency of HIV-specific cytotoxic T cells (CTLs) that is required to detect productively infected cells before the release of viral particles starts. With this, it provides guidance for HIV vaccine studies allowing for the migration of cells in fibrotic LNs.