Tumor evolution: Linear, branching, neutral or punctuated?

Tumor evolution: Linear, branching, neutral or punctuated?
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DOI:
10.1016/j.bbcan.2017.01.003
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发表时间:
2017-04
期刊:
Biochimica et biophysica acta. Reviews on cancer
影响因子:
--
通讯作者:
Navin N
Navin N
中科院分区:
其他
文献类型:
--
作者:
Davis A;Gao R;Navin N

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肿瘤内的异质性在人类癌症中已被广泛报道,但我们对这种遗传多样性如何随着时间的推移而出现的了解仍然有限。研究肿瘤进化的一个中心挑战是从癌症患者身上收集纵向样本的困难。因此,大多数研究都是从单个时间点样本推断肿瘤的进化,提供了非常间接的信息。这些数据导致了几种相互竞争的肿瘤进化模型:线性模型、分支模型、中性模型和间断模型。每个模型对突变的时机和克隆的选择做出了不同的假设,因此对癌症患者的诊断和治疗具有不同的含义。此外,新出现的证据表明,模型可能会在肿瘤进展过程中发生变化,或者同时对不同类别的突变进行操作。最后,我们讨论了支持大多数人类肿瘤是从正常组织中的单个细胞进化而来的理论的数据。本文是由Robert A.Gatenby博士编辑的题为:进化原理--癌症中的异质性?的特刊的一部分。
Intratumor heterogeneity has been widely reported in human cancers, but our knowledge of how this genetic diversity emerges over time remains limited. A central challenge in studying tumor evolution is the difficulty in collecting longitudinal samples from cancer patients. Consequently, most studies have inferred tumor evolution from single time-point samples, providing very indirect information. These data have led to several competing models of tumor evolution: linear, branching, neutral and punctuated. Each model makes different assumptions regarding the timing of mutations and selection of clones, and therefore has different implications for the diagnosis and therapeutic treatment of cancer patients. Furthermore, emerging evidence suggests that models may change during tumor progression or operate concurrently for different classes of mutations. Finally, we discuss data that supports the theory that most human tumors evolve from a single cell in the normal tissue. This article is part of a Special Issue entitled: Evolutionary principles - heterogeneity in cancer?, edited by Dr. Robert A. Gatenby.
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