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arXiv 1107.0641q-bio.TOcond-mat.stat-mechphysics.bio-ph
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噪声辅助的肿瘤-免疫细胞相互作用

Noise-assisted tumor-immune cells interaction

Thomas Bose, Steffen Trimper

摘要:

本文考虑了一个受噪声影响的肿瘤细胞、效应细胞和肿瘤检测细胞三态模型。结果表明,存在于所有三种细胞中的不可避免的随机力能够完全抑制肿瘤细胞的生长。尽管确定性模型没有揭示稳定的无肿瘤状态,但是与互相关函数相结合的自相关噪声可以导致肿瘤休眠状态、肿瘤进展以及肿瘤细胞的消除。自相关函数表现出有限的相关时间$τ$,而互相关函数表现出白噪声行为。这三种细胞中的每一种细胞的演化导致乘性噪声耦合。该模型的研究通过一个多变量的Fokker-Planck方程的小$τ$。系统的不同行为首先由相关时间的变化和肿瘤与肿瘤检测细胞之间的互相关强度决定。的理论模型是基于详细讨论的生物背景和结果进行了测试,使用现实的参数从实验观察。

英文摘要:

We consider a three-state model comprising tumor cells, effector cells and tumor detecting cells under the influence of noises. It is demonstrated that inevitable stochastic forces existing in all three cell species are able to suppress tumor cell growth completely. Whereas the deterministic model does not reveal a stable tumor-free state, the auto-correlated noise combined with cross-correlation functions can either lead to tumor dormant states, tumor progression as well as to an elimination of tumor cells. The auto-correlation function exhibits a finite correlation time $τ$ while the cross-correlation functions shows a white noise behavior. The evolution of each of the three kinds of cells leads to a multiplicative noise coupling. The model is investigated by means of a multivariate Fokker-Planck equation for small $τ$. The different behavior of the system is above all determined by the variation of the correlation time and the strength of the cross-correlation between tumor and tumor detecting cells. The theoretical model is based on a biological background discussed in detail and the results are tested using realistic parameters from experimental observations.

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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