miRNA regulation of Sdf1 chemokine signaling provides genetic robustness to germ cell migration.

miRNA regulation of Sdf1 chemokine signaling provides genetic robustness to germ cell migration.
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DOI:
10.1038/ng.758
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发表时间:
2011-03
期刊:
影响因子:
30.8
通讯作者:
Giraldez, Antonio J.
Giraldez, Antonio J.
中科院分区:
生物学1区
文献类型:
--
作者:
Staton, Alison A.;Knaut, Holger;Giraldez, Antonio J.

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microRNA 作为遗传变阻器来控制基因输出。基于它们作为调节剂的作用,人们推测 microRNA 可以促进发育并提供遗传稳健性。在这里,我们发现了 microRNA 趋化因子信号传导的新调控层,它赋予原始生殖细胞 (PGC) 迁移的遗传鲁棒性。在斑马鱼中,PGC 由配体 Sdf1a 引导至性腺,配体 Sdf1a 受隔离受体 Cxcr7b 调节。我们发现 miR-430 调节 sdf1a- 和 cxcr7-mRNA。使用目标保护器,我们证明了 miR-430 介导的内源 sdf1a 和 cxcr7b 调节(i)通过清除先前表达域中的 mRNA 来促进 sdf1a 的动态表达,(ii)调节诱饵受体 Cxcr7b 的水平以避免 Sdf1a 的过度消耗,以及(iii)缓冲趋化因子信号成分基因剂量的变化,以确保准确的 PGC 迁移。我们的结果表明,失去 microRNA 介导的调节可能会暴露出缓冲的遗传损伤,从而导致发育缺陷。
microRNAs function as genetic rheostats to control gene output. Based on their role as modulators, it has been postulated that microRNAs canalize development and provide genetic robustness. Here, we uncover a novel regulatory layer of chemokine signaling by microRNAs that confers genetic robustness on primordial-germ-cell (PGC) migration. In zebrafish, PGCs are guided to the gonad by the ligand Sdf1a, which is regulated by sequestration receptor Cxcr7b. We find that miR-430 regulates sdf1a- and cxcr7-mRNAs. Using Target Protectors, we demonstrate that miR-430-mediated regulation of endogenous sdf1a and cxcr7b (i) facilitates dynamic expression of sdf1a by clearing its mRNA from previous expression domains, (ii) modulates the levels of the decoy receptor Cxcr7b to avoid excessive depletion of Sdf1a and (iii) buffers against variation in gene dosage of chemokine signaling components to ensure accurate PGC migration. Our results indicate that losing microRNA-mediated regulation can expose otherwise buffered genetic lesions leading to developmental defects.
DOI: 10.1126/science.1122689
发表时间: 2006-04-07
期刊: SCIENCE
影响因子: 56.9
作者:
Giraldez, AJ;Mishima, Y;Schier, AF
通讯作者: Schier, AF
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发表时间: 2002-12-10
影响因子: 11.1
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影响因子: --
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通讯作者: Gutierrez-Ramos JC
DOI: 10.1038/35065016
发表时间: 2001-03-01
期刊: NATURE
影响因子: 64.8
作者:
Müller, A;Homey, B;Zlotnik, A
通讯作者: Zlotnik, A