A chemical genetics approach reveals H,K-ATPase-mediated membrane voltage is required for planarian head regeneration.

A chemical genetics approach reveals H,K-ATPase-mediated membrane voltage is required for planarian head regeneration.
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DOI:
10.1016/j.chembiol.2010.11.012
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发表时间:
2011-01-28
影响因子:
--
通讯作者:
Levin M
Levin M
中科院分区:
生物1区
文献类型:
--
作者:
Beane WS;Morokuma J;Adams DS;Levin M

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胚胎极性和再生生长都需要生物物理信号。利用内源性离子转运进行再生治疗将需要直接调节膜电压。在这里,我们开发了一种靶向离子转运体的药理学方法,揭示了膜电压在涡虫再生中作为前极性关键调节因子的新作用。利用高特异性抑制剂SCH-28080,我们的数据显示,H+,K+- atp酶介导的膜去极化对于前基因表达和脑诱导至关重要。伊维菌素对膜电位的不依赖于H+,K+- atp酶的操纵证实了去极化驱动头部形成,即使是在面向后的伤口。利用这种化学遗传学方法,我们证明了膜电压控制头部vs。在涡虫再生过程中。我们的数据表明,在复杂结构再生过程中,可能利用特性良好的药物(已经批准用于人类)来控制成体干细胞驱动的模式形成。
Biophysical signaling is required for both embryonic polarity and regenerative outgrowth. Exploiting endogenous ion transport for regenerative therapies will require direct regulation of membrane voltage. Here, we develop a pharmacological method to target ion transporters, uncovering a novel role for membrane voltage as a key regulator of anterior polarity in regenerating planaria. Utilizing the highly specific inhibitor, SCH-28080, our data reveal that H+,K+-ATPase-mediated membrane depolarization is essential for anterior gene expression and brain induction. H+,K+-ATPase-independent manipulation of membrane potential with ivermectin confirms that depolarization drives head formation, even at posterior-facing wounds. Using this chemical genetics approach, we demonstrate that membrane voltage controls head-vs.-tail identity during planarian regeneration. Our data suggest well-characterized drugs (already approved for human use) might be exploited to control adult stem cell-driven pattern formation during the regeneration of complex structures.
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