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arXiv 1305.3418q-bio.PE
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甲型流感病毒逃逸策略的动力学相关性

Dynamical correlations in the escape strategy of Influenza A virus

Lorenzo Taggi, Francesca Colaiori, Vittorio Loreto, Francesca Tria

摘要:

人类甲型流感病毒的演化动力学提出了一个具有挑战性的理论问题。极高的突变率使病毒在每个流行季节都能逃脱先前感染引起的宿主免疫保护。同时,在每个特定的流行季节,观察到一个单一的准种,即一组密切相关的菌株。基因(即,在序列水平)和抗原性(即,与宿主免疫反应有关)距离可以揭示这个难题。在本文中,我们介绍了一个模型,在该模型中,根据实验观察,一个简单的相互作用规则的基础上点突变之间的空间相关性动态定义的免疫空间中的序列。我们调查这个空间的静态和动态结构,并讨论它如何影响病毒-宿主相互作用的动态。有趣的是,我们在病毒进化中观察到交错的时间结构,就像在真正的流感演化动力学中一样。

英文摘要:

The evolutionary dynamics of human Influenza A virus presents a challenging theoretical problem. An extremely high mutation rate allows the virus to escape, at each epidemic season, the host immune protection elicited by previous infections. At the same time, at each given epidemic season a single quasi-species, that is a set of closely related strains, is observed. A non-trivial relation between the genetic (i.e., at the sequence level) and the antigenic (i.e., related to the host immune response) distances can shed light into this puzzle. In this paper we introduce a model in which, in accordance with experimental observations, a simple interaction rule based on spatial correlations among point mutations dynamically defines an immunity space in the space of sequences. We investigate the static and dynamic structure of this space and we discuss how it affects the dynamics of the virus-host interaction. Interestingly we observe a staggered time structure in the virus evolution as in the real Influenza evolutionary dynamics.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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