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FUNCTION OF THE EPH-RELATED KINASE RTK1 IN PATTERNING OF THE ZEBRAFISH FOREBRAIN

机译:EPH相关激酶RTK1在斑马鱼前脑形成过程中的作用

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EARLY during its development, the vertebrate brain is subdivided into regions that have distinct fates and correlate with the expression domains of regulatory genes(1,2), but little is known about the cell-cell interactions that establish this spatial pattern. Candidates for regulating such interactions are the Eph-related receptor tyrosine kinases (RTKs) which have spatially restricted expression in the developing brain(2-6). These RTKs may mediate cell-contact-dependent signalling by interacting with membrane-bound ligands, and have been implicated in axon repulsion(8,9) and the segmental restriction of gene expression in the hindbrain(10), but nothing is known regarding their function in the rostral neural epithelium. Here we use a dominant-negative approach in the zebrafish embryo to interfere with the function of Rtk1, an Eph-related RTK expressed in the developing diencephalon. We find that expression of a truncated receptor leads to expansion of the eye field into diencephalic territory and loss of diencephalic structures, indicating a role for Rtk1 in patterning the developing forebrain. [References: 28]
机译:在其发育的早期,脊椎动物脑被细分为具有不同命运并与调节基因的表达域相关的区域(1,2),但对建立这种空间模式的细胞间相互作用知之甚少。调节这种相互作用的候选蛋白是Eph相关受体酪氨酸激酶(RTK),在发育中的大脑中其表达受到空间限制(2-6)。这些RTKs可能通过与膜结合的配体相互作用来介导细胞接触依赖性信号传导,并参与了轴突排斥(8,9)和后脑基因表达的节段性限制(10),但关于它们的了解未知在鼻神经上皮中起作用。在这里,我们在斑马鱼胚胎中使用显性负性方法来干扰Rtk1的功能,Rtk1是在发育中的前脑中表达的Eph相关RTK。我们发现一个截短的受体的表达导致眼睛视野扩大到双脑区域和双脑结构的损失,表明Rtk1在模式发展中的前脑的作用。 [参考:28]

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