F-spondin/spon1b expression patterns in developing and adult zebrafish.

F-spondin/spon1b expression patterns in developing and adult zebrafish.
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DOI:
10.1371/journal.pone.0037593
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发表时间:
2012
期刊:
影响因子:
3.7
通讯作者:
Zhdanova IV
Zhdanova IV
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Akle V;Guelin E;Yu L;Brassard-Giordano H;Slack BE;Zhdanova IV

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F-响应蛋白是一种细胞外基质蛋白,在胚胎形态发生和中枢神经系统发育中起重要作用,但它在生命后期的存在和作用仍很大程度上尚不清楚。我们获得了一种转基因斑马鱼,其中GFP在F-Spin1b启动子的控制下表达,并将其与互补技术相结合,对F-Spinin在发育中和成年脑以及外周的表达模式进行了详细的表征。我们发现,F-pondin经常与形成长神经束的结构有关,包括视网膜神经节细胞、嗅球、缰核和内侧纵束核(NMLF)。F-pondin的表达与成体神经发生区一致,在接触脑脊液的分泌型神经元中大量表达,尤其是在下丘脑。使用这个新的转基因模型还揭示了F-pondin在周围中枢神经系统中的表达模式,特别是在肠道神经元中,以及参与成年斑马鱼活跃图案或增殖的外围组织中,包括斑马鱼鳍的内骨骼和不断再生的咽齿。此外,成年斑马鱼切断鳍后尾鳍再生的模式与胚泡中F-Respondin的表达有关,胚泡是组织重建的关键增殖区。综上所述,这些发现表明,在发育中的脊椎动物和成年脊椎动物的中枢神经系统和外围,F-spinin起着重要的作用。
F-spondin, an extracellular matrix protein, is an important player in embryonic morphogenesis and CNS development, but its presence and role later in life remains largely unknown. We generated a transgenic zebrafish in which GFP is expressed under the control of the F-spondin (spon1b) promoter, and used it in combination with complementary techniques to undertake a detailed characterization of the expression patterns of F-spondin in developing and adult brain and periphery. We found that F-spondin is often associated with structures forming long neuronal tracts, including retinal ganglion cells, the olfactory bulb, the habenula, and the nucleus of the medial longitudinal fasciculus (nMLF). F-spondin expression coincides with zones of adult neurogenesis and is abundant in CSF-contacting secretory neurons, especially those in the hypothalamus. Use of this new transgenic model also revealed F-spondin expression patterns in the peripheral CNS, notably in enteric neurons, and in peripheral tissues involved in active patterning or proliferation in adults, including the endoskeleton of zebrafish fins and the continuously regenerating pharyngeal teeth. Moreover, patterning of the regenerating caudal fin following fin amputation in adult zebrafish was associated with F-spondin expression in the blastema, a proliferative region critical for tissue reconstitution. Together, these findings suggest major roles for F-spondin in the CNS and periphery of the developing and adult vertebrate.
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