Identification of nucleus pulposus precursor cells and notochordal remnants in the mouse: implications for disk degeneration and chordoma formation.

Identification of nucleus pulposus precursor cells and notochordal remnants in the mouse: implications for disk degeneration and chordoma formation.
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DOI:
10.1002/dvdy.21805
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发表时间:
2008-12
影响因子:
2.5
通讯作者:
Harfe, Brian D.
Harfe, Brian D.
中科院分区:
生物学3区
文献类型:
--
作者:
Choi, Kyung-Suk;Cohn, Martin J.;Harfe, Brian D.

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髓核中一个经典的“脊索”细胞群被认为可以调节椎间盘的内稳态。然而,这些细胞的胚胎起源在近60年来一直存在争议。在这里,我们提供了第一个直接证据,证明成年小鼠髓核中的所有细胞类型都来自胚胎脊索。此外,罕见的分离胚胎脊索细胞留在脊柱中,类似于“脊索残余物”,在人类中,这被认为会导致一种罕见的迟发性癌症,称为脊索瘤。此前,这种细胞类型尚未在小鼠模型系统中被鉴定出来。在任何突变背景下,可用于绘制髓核前体细胞命运图的小鼠模型的开发和表征将有助于揭示椎间盘退变的细胞和分子机制。此外,鉴定小鼠脊索残余是建立脊索瘤体内模型的第一步。
A classically identified “notochordal” cell population in the nucleus pulposus is thought to regulate disk homeostasis. However, the embryonic origin of these cells has been under dispute for >60 years. Here we provide the first direct evidence that all cell types in the adult mouse nucleus pulposus are derived from the embryonic notochord. Additionally, rare isolated embryonic notochord cells remained in the vertebral column and resembled “notochordal remnants,” which in humans have been proposed to give rise to a rare type of late-onset cancer called chordoma. Previously, this cell type had not been identified in the mouse model system. The development and characterization of a mouse model that can be used to fate map nucleus pulposus precursor cells in any mutant background will be useful for uncovering the cellular and molecular mechanisms of disk degeneration. In addition, the identification of notochordal remnants in mice is the first step towards generating an in vivo model of chordoma.
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