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Crosstalk between planar cell polarity signaling and miR-8 control of NHERF1-mediated actin reorganization.

机译:平面细胞极性信号传导与NHERF1介导的肌动蛋白重组的miR-8控制之间的串扰。

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摘要

The response to osmotic stress in developing zebrafish embryos requires proper apical patterning and trafficking of transmembrane ion transporters in ionocytes, specialized cells of the epidermis. The miR-8 family of miRNAs plays a key role in this process by precisely regulating the activity of NHERF1, a regulator of sodium hydrogen exchange that also serves as an adaptor protein linked to the actin cytoskeleton. We have discovered that NHERF1 activity is also coupled to Planar Cell Polarity (PCP) signaling in the zebrafish epidermis. Loss of NHERF1 in wild type fish disrupts actin organization but the observed defects can be largely restored when combined with mutants in the PCP pathway. We propose that proper apical patterning depends on input and coordination between PCP signaling and the response to stress.
机译:在发育中的斑马鱼胚胎中对渗透压的反应需要在根尖细胞,表皮的特殊细胞中的跨膜离子转运蛋白进行适当的根尖构图和运输。 miR-8家族的miRNA家族在此过程中起着关键作用,它可以精确调节NHERF1的活性,NHERF1是钠氢交换的调节剂,也可充当与肌动蛋白细胞骨架相连的衔接蛋白。我们已经发现,NHERF1活性还与斑马鱼表皮中的平面细胞极性(PCP)信号耦合。野生型鱼类中NHERF1的缺失会破坏肌动蛋白的组织,但与PCP途径中的突变体结合后,所观察到的缺陷可在很大程度上恢复。我们建议适当的根尖模式取决于输入和PCP信号与压力反应之间的协调。

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