Low frequency vibrations disrupt left-right patterning in the Xenopus embryo.

Low frequency vibrations disrupt left-right patterning in the Xenopus embryo.
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DOI:
10.1371/journal.pone.0023306
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发表时间:
2011
期刊:
影响因子:
3.7
通讯作者:
Levin M
Levin M
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Vandenberg LN;Pennarola BW;Levin M

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一致的左-右(LR)不对称在整个门的发展是生物学中的一个有趣的问题。虽然许多药理学和分子方法已经被用来探索分子机制,但事实证明,很难对功能扰动施加精确的时间控制。在这里,我们利用声学振动来扰乱非洲爪哇胚胎在严格受限的发育时期的LR模式。暴露在几个低频率下会导致三个内部器官的特异性随机化(异质性)。研究一个频率(7赫兹),我们发现两个离散的振动敏感期;在第一个时期,振动影响与诺可达唑相同的LR途径,而在第二个时期,振动影响上皮屏障的完整性;两者都是正常LR模式所必需的。我们的结果表明,低频振动破坏了早期LR通路中的两个步骤:LR轴与另两个轴的定向,以及下游LR信号对不对称器官的放大/限制。
The development of consistent left-right (LR) asymmetry across phyla is a fascinating question in biology. While many pharmacological and molecular approaches have been used to explore molecular mechanisms, it has proven difficult to exert precise temporal control over functional perturbations. Here, we took advantage of acoustical vibration to disrupt LR patterning in Xenopus embryos during tightly-circumscribed periods of development. Exposure to several low frequencies induced specific randomization of three internal organs (heterotaxia). Investigating one frequency (7 Hz), we found two discrete periods of sensitivity to vibration; during the first period, vibration affected the same LR pathway as nocodazole, while during the second period, vibration affected the integrity of the epithelial barrier; both are required for normal LR patterning. Our results indicate that low frequency vibrations disrupt two steps in the early LR pathway: the orientation of the LR axis with the other two axes, and the amplification/restriction of downstream LR signals to asymmetric organs.
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