Genetic oscillations. A Doppler effect in embryonic pattern formation.

Genetic oscillations. A Doppler effect in embryonic pattern formation.
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DOI:
10.1126/science.1253089
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发表时间:
2014-07-11
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Oates AC
Oates AC
中科院分区:
其他
文献类型:
--
作者:
Soroldoni D;Jörg DJ;Morelli LG;Richmond DL;Schindelin J;Jülicher F;Oates AC

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在胚胎发育过程中,时间和空间的线索协调产生一个分段的身体轴。据报道,在连续分割动物中,分割的节奏由周期性触发新片段形成的遗传振荡的时间尺度控制。然而,我们提出了实时测量斑马鱼胚胎中的遗传振荡,表明它们的时间尺度不足以解释分割的时间周期。第二个时间尺度,组织缩短的速率,通过多普勒效应对分割的周期做出贡献。该贡献通过跨越组织的振荡轮廓的逐渐变化来调制。我们的结论是分割的节奏是一个紧急的属性控制的时间尺度的遗传振荡,振荡配置文件的变化,和组织缩短。
During embryonic development, temporal and spatial cues are coordinated to generate a segmented body axis. In sequentially segmenting animals, the rhythm of segmentation is reported to be controlled by the time-scale of genetic oscillations that periodically trigger new segment formation. However, we present real-time measurements of genetic oscillations in zebrafish embryos showing that their time-scale is not sufficient to explain the temporal period of segmentation. A second time-scale, the rate of tissue shortening, contributes to the period of segmentation through a Doppler effect. This contribution is modulated by a gradual change in the oscillation profile across the tissue. We conclude that the rhythm of segmentation is an emergent property controlled by the time-scale of genetic oscillations, the change of oscillation profile, and tissue shortening.
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