Zebrafish models of idiopathic scoliosis link cerebrospinal fluid flow defects to spine curvature.

Zebrafish models of idiopathic scoliosis link cerebrospinal fluid flow defects to spine curvature.
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特发性脊柱侧弯的斑马鱼模型将脑脊液流缺陷与脊柱曲率联系起来。

DOI:
10.1126/science.aaf6419
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发表时间:
2016-06-10
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Ciruna B
Ciruna B
中科院分区:
其他
文献类型:
--
作者:
Grimes DT;Boswell CW;Morante NF;Henkelman RM;Burdine RD;Ciruna B

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特发性脊柱侧凸(IS)影响了全世界3%的儿童,但脊柱畸形的潜在机制仍不清楚。在这里,我们表明,ptk7突变斑马鱼,一个忠实的遗传模型的IS,表现出室管膜细胞(EC)纤毛的发展和脑脊液(CSF)流动缺陷。在运动纤毛谱系中转基因重新引入Ptk7可预防ptk7突变体的脊柱侧凸,而多个独立纤毛运动基因的突变产生IS表型。我们定义了脊柱形态发生中活动纤毛的有限发育窗口。值得注意的是,脊柱侧凸发作后纤毛运动的恢复阻断了脊柱弯曲的进展。总之,我们的研究结果表明纤毛驱动的CSF流动在脊柱发育中的关键作用,暗示CSF流动的不规则性是IS的潜在生物学原因,并提供了非侵入性治疗干预可以预防严重脊柱侧凸的原理证明。
Idiopathic scoliosis (IS) affects 3% of children worldwide, yet mechanisms underlying spinal deformity remain unknown. Here we show that ptk7 mutant zebrafish, a faithful genetic model of IS, exhibit ependymal cell (EC) cilia development and cerebrospinal fluid (CSF) flow defects. Transgenic re-introduction of Ptk7 in motile ciliated lineages prevents scoliosis in ptk7 mutants, while mutation of multiple independent cilia motility genes yield IS phenotypes. We define a finite developmental window for motile cilia in spine morphogenesis. Notably, restoration of cilia motility, after scoliosis onset, blocks spinal curve progression. Together, our results indicate a critical role for cilia-driven CSF flow in spine development, implicate irregularities in CSF flow as an underlying biological cause of IS and provide proof-of-principle that non-invasive therapeutic intervention could prevent severe scoliosis.
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