The competitive dynamics between tumor cells, a replication-competent virus and an immune response

The competitive dynamics between tumor cells, a replication-competent virus and an immune response
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肿瘤细胞、具有复制能力的病毒和免疫反应之间的竞争动态

DOI:
10.1007/s00285-004-0310-6
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发表时间:
2005-03
影响因子:
1.9
通讯作者:
Guo, Q
Guo, Q
中科院分区:
数学4区
文献类型:
--
作者:
Tao, YS;Guo, Q

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具有复制能力的病毒已被用作癌症治疗的替代治疗方法。然而,新的临床数据显示,对病毒的先天免疫反应可能会减轻治疗的影响。最近,Wein、Wu和Kirn建立了描述肿瘤细胞、具有复制能力的病毒和免疫应答之间的相互作用的模型(Cancer Research 63(2003):1317-1324)。本文的目的是从数学和生物学的角度扩展他们的模型,然后证明这个新的模型的整体存在性和唯一性的解,研究这种新的治疗癌症的动力学,并探索一个明确的阈值的强度的免疫反应控制肿瘤。我们还研究了模型的时滞版本。证明了时滞τ存在一个临界值τ 0,使得当τ>τ0时,系统存在周期解.数值模拟验证了分析结果。此外,我们数值研究的时空动力学模型。本文还讨论了免疫反应扩散性对肿瘤生长的影响。
Replication-competent viruses have been used as an alternative therapeutic approach for cancer treatment. However, new clinical data revealed an innate immune response to virus that may mitigate the effects of treatment. Recently, Wein, Wu and Kirn have established a model which describes the interaction between tumor cells, a replication-competent virus and an immune response (Cancer Research 63 (2003):1317–1324). The purpose of this paper is to extend their model from the viewpoints of mathematics and biology and then prove global existence and uniqueness of solution to this new model, to study the dynamics of this novel therapy for cancers, and to explore a explicit threshold of the intensity of the immune response for controlling the tumor. We also study a time-delayed version of the model. We analytically prove that there exists a critical valueτ0of the time-delayτsuch that the system has a periodic solution ifτ>τ0. Numerical simulations are given to verify the analytical results. Furthermore, we numerically study the spatio-temporal dynamics of the model. The effects of the diffusivity of the immune response on the tumor growth are also discussed.
DOI: --
发表时间: 1974-10
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影响因子: 4.4
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