Evidence for the regulation of left‐right asymmetry in Ciona intestinalis by ion flux

Evidence for the regulation of left‐right asymmetry in Ciona intestinalis by ion flux
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离子流调节海鞘左右不对称性的证据

DOI:
10.1002/dvdy.20792
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发表时间:
2006
影响因子:
2.5
通讯作者:
M. Levin
M. Levin
中科院分区:
生物学3区
文献类型:
--
作者:
S. Shimeld;M. Levin

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脊椎动物胚胎在涉及nodal和Pitx 2基因的左侧部署的保守途径的控制下发展出明显的左右不对称性。启动这些基因的不对称表达的机制尚不清楚,纤毛,离子通量和信号分子都涉及。脊椎动物与尾索动物共享脊索动物门,如海鞘。我们已经探索了离子通量在调节玻璃海鞘左右不对称性中的作用,使用一种测定法,其中左侧Ci‐Pitx表达的扰动提供了不对称性破坏的读数。我们的数据表明,奥美拉唑,它特异性地抑制H+K+ ATP酶活性,破坏玻璃海鞘中的不对称性。脊椎动物H+K+ ATP酶由α和β两个亚基组成。我们鉴定了脊椎动物H+K+ ATP酶基因的一个玻璃海鞘β直系同源物和两个玻璃海鞘α直系同源物,并表明其中一个在左侧Ci‐Pitx表达激活前不久在背侧和腹侧胚胎中线细胞中表达。此外,我们表明,奥美拉唑发挥其作用的不对称性在这一点上的发展,并另外牵连K+通道的不对称性的调节玻璃海鞘。这些实验证明了离子通量在玻璃海鞘不对称性调节中的作用,并显示了H+K+ ATP酶离子泵在此过程中保守的祖先作用。发展动力学235:1543-1553,2006年。© 2006 Wiley利斯公司
Vertebrate embryos develop distinct left‐right asymmetry under the control of a conserved pathway involving left‐sided deployment of the nodal and Pitx2 genes. The mechanism that initiates asymmetric expression of these genes is less clear, with cilia, ion flux, and signalling molecules all implicated. Vertebrates share the chordate phylum with urochordates such as the sea squirt Ciona intestinalis. We have explored the role of ion flux in regulating left‐right asymmetry in Ciona, using an assay in which perturbation of left‐sided Ci‐Pitx expression provides a read‐out for the disruption of asymmetry. Our data show that omeprazole, which specifically inhibits H+K+ATPase activity, disrupts asymmetry in Ciona. The vertebrate H+K+ATPase is composed of two subunits, α and β. We identified one Ciona β ortholog and two Ciona α orthologs of the vertebrate H+K+ATPase genes, and show that one of these is expressed in dorsal and ventral embryonic midline cells shortly before the activation of left‐sided Ci‐Pitx expression. Furthermore, we show that omeprazole exerts its effect on asymmetry at this point in development, and additionally implicate K+ channels in the regulation of asymmetry in Ciona. These experiments demonstrate a role for ion flux in the regulation of asymmetry in Ciona, and show a conserved, ancestral role for the H+K+ATPase ion pump in this process. Developmental Dynamics 235:1543–1553, 2006. © 2006 Wiley‐Liss, Inc.
DOI: 10.1152/ajprenal.00273.2001
发表时间: 2002-03-01
影响因子: 4.2
作者:
Yoder, BK;Tousson, A;Balkovetz, DF
通讯作者: Balkovetz, DF
DOI: 10.1242/dev.01772
发表时间: 2005-04-01
期刊: DEVELOPMENT
影响因子: 4.6
作者:
Kramer-Zucker, AG;Olale, F;Drummond, IA
通讯作者: Drummond, IA
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DOI: 10.1242/dev.126.21.4703
发表时间: 1999
期刊: Development (Cambridge, England)
影响因子: --
作者:
Levin,M;Mercola,M
通讯作者: Mercola,M