Strategies for sperm chemotaxis in the siphonophores and ascidians: A numerical simulation study
Strategies for sperm chemotaxis in the siphonophores and ascidians: A numerical simulation study
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DOI：
10.2307/1543540
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发表时间：
2004-04-01
影响因子：
1.6
通讯作者：
Morisawa, M
中科院分区：
文献类型：
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作者：
Ishikawa, M;Tsutsui, H;Morisawa, M
精子向卵子的趋化游泳行为在许多物种中都有报道。然而，这些行为背后的策略却知之甚少。我们集中在两种类型的趋化性，一个在管水母和海鞘第二，然后提出了两个模型的基础上的实验数据。这两个模型都假设游动精子的路径曲率半径取决于[Ca 2 +]（i），即细胞内钙离子浓度。在管水母中的趋化性可以在一个模型中模拟，该模型假设[Ca 2 +]（i）取决于精子附近的引诱剂的局部浓度，并且瞬时高[Ca 2 +]（i）的清除需要相当长的时间。在海鞘的情况下，轨迹类似于那些在实验中可以充分模拟这个模型的一个变体，假设[Ca 2 +]（i）依赖于时间导数的引诱剂浓度。这些策略的属性和未来的问题进行了讨论，在这些模型。
Chemotactic swimming behaviors of spermatozoa toward an egg have been reported in various species. The strategies underlying these behaviors, however, are poorly understood. We focused on two types of chemotaxis, one in the siphonophores and the second in the ascidians, and then proposed two models based on experimental data. Both models assumed that the radius of the path curvature of a swimming spermatozoon depends on [Ca2+](i), the intracellular calcium concentration. The chemotaxis in the siphonophores could be simulated in a model that assumes that [Ca2+](i) depends on the local concentration of the attractant in the vicinity of the spermatozoon and that a substantial time period is required for the clearance of transient high [Ca2+](i). In the case of ascidians, trajectories similar to those in experiments could be adequately simulated by a variant of this model that assumes that [Ca2+](i) depends on the time derivative of the attractant concentration. The properties of these strategies and future problems are discussed in relation to these models.